package CFClient::UI;

use utf8;
use strict;

use Scalar::Util ();
use List::Util ();

use CFClient;
use CFClient::Texture;

our ($FOCUS, $HOVER, $GRAB); # various widgets

our $LAYOUT;
our $ROOT;
our $TOOLTIP;
our $BUTTON_STATE;

our %WIDGET; # all widgets, weak-referenced

sub get_layout {
   my $layout;

   for (grep { $_->{name} } values %WIDGET) {
      my $win = $layout->{$_->{name}} = { };
      
      $win->{x} = ($_->{x} + $_->{w} * 0.5) / $::WIDTH   if $_->{x} =~ /^[0-9.]+$/;
      $win->{y} = ($_->{y} + $_->{h} * 0.5) / $::HEIGHT  if $_->{y} =~ /^[0-9.]+$/;
      $win->{w} = $_->{w} / $::WIDTH                     if defined $_->{w};
      $win->{h} = $_->{h} / $::HEIGHT                    if defined $_->{h};

      $win->{show} = $_->{visible} && $_->{is_toplevel};
   }

   $layout
}

sub set_layout {
   my ($layout) = @_;

   $LAYOUT = $layout;
}

sub check_tooltip {
   return if $ENV{CFPLUS_DEBUG} & 8;

   if (!$GRAB) {
      for (my $widget = $HOVER; $widget; $widget = $widget->{parent}) {
         if (length $widget->{tooltip}) {
            if ($TOOLTIP->{owner} != $widget) {
               $TOOLTIP->hide;

               $TOOLTIP->{owner} = $widget;

               my $tip = $widget->{tooltip};

               $tip = $tip->($widget) if CODE:: eq ref $tip;
               
               $TOOLTIP->set_tooltip_from ($widget);
               $TOOLTIP->show;
            }

            return;
         }
      }
   }

   $TOOLTIP->hide;
   delete $TOOLTIP->{owner};
}

# class methods for events
sub feed_sdl_key_down_event { 
   $FOCUS->emit (key_down => $_[0])
      if $FOCUS;
}

sub feed_sdl_key_up_event {
   $FOCUS->emit (key_up => $_[0])
      if $FOCUS;
}

sub feed_sdl_button_down_event {
   my ($ev) = @_;
   my ($x, $y) = ($ev->{x}, $ev->{y});

   if (!$BUTTON_STATE) {
      my $widget = $ROOT->find_widget ($x, $y);

      $GRAB = $widget;
      $GRAB->update if $GRAB;

      check_tooltip;
   }

   $BUTTON_STATE |= 1 << ($ev->{button} - 1);

   $GRAB->emit (button_down => $ev, $GRAB->coord2local ($x, $y))
      if $GRAB;
}

sub feed_sdl_button_up_event {
   my ($ev) = @_;
   my ($x, $y) = ($ev->{x}, $ev->{y});

   my $widget = $GRAB || $ROOT->find_widget ($x, $y);

   $BUTTON_STATE &= ~(1 << ($ev->{button} - 1));

   $GRAB->emit (button_up => $ev, $GRAB->coord2local ($x, $y))
      if $GRAB;

   if (!$BUTTON_STATE) {
      my $grab = $GRAB; undef $GRAB;
      $grab->update if $grab;
      $GRAB->update if $GRAB;

      check_tooltip;
   }
}

sub feed_sdl_motion_event {
   my ($ev) = @_;
   my ($x, $y) = ($ev->{x}, $ev->{y});

   my $widget = $GRAB || $ROOT->find_widget ($x, $y);

   if ($widget != $HOVER) {
      my $hover = $HOVER; $HOVER = $widget;

      $hover->update if $hover && $hover->{can_hover};
      $HOVER->update if $HOVER && $HOVER->{can_hover};

      check_tooltip;
   }

   $HOVER->emit (mouse_motion => $ev, $HOVER->coord2local ($x, $y))
      if $HOVER;
}

# convert position array to integers
sub harmonize {
   my ($vals) = @_;

   my $rem = 0;

   for (@$vals) {
      my $i = int $_ + $rem;
      $rem += $_ - $i;
      $_ = $i;
   }
}

sub full_refresh {
   # make a copy, otherwise for complains about freed values.
   my @widgets = values %WIDGET;

   $_->update
      for @widgets;
}

sub reconfigure_widgets {
   # make a copy, otherwise C<for> complains about freed values.
   my @widgets = values %WIDGET;

   $_->reconfigure
      for @widgets;
}

# call when resolution changes etc.
sub rescale_widgets {
   my ($sx, $sy) = @_;

   for my $widget (values %WIDGET) {
      if ($widget->{is_toplevel}) {
         $widget->{x} += int $widget->{w} * 0.5 if $widget->{x} =~ /^[0-9.]+$/;
         $widget->{y} += int $widget->{h} * 0.5 if $widget->{y} =~ /^[0-9.]+$/;

         $widget->{x}       = int 0.5 + $widget->{x}        * $sx if $widget->{x} =~ /^[0-9.]+$/;
         $widget->{w}       = int 0.5 + $widget->{w}        * $sx if exists $widget->{w};
         $widget->{force_w} = int 0.5 + $widget->{force_w}  * $sx if exists $widget->{force_w};
         $widget->{y}       = int 0.5 + $widget->{y}        * $sy if $widget->{y} =~ /^[0-9.]+$/;
         $widget->{h}       = int 0.5 + $widget->{h}        * $sy if exists $widget->{h};
         $widget->{force_h} = int 0.5 + $widget->{force_h}  * $sy if exists $widget->{force_h};

         $widget->{x} -= int $widget->{w} * 0.5 if $widget->{x} =~ /^[0-9.]+$/;
         $widget->{y} -= int $widget->{h} * 0.5 if $widget->{y} =~ /^[0-9.]+$/;

      }
   }

   reconfigure_widgets;
}

#############################################################################

package CFClient::UI::Base;

use strict;

use CFClient::OpenGL;

sub new {
   my $class = shift;

   my $self = bless {
      x          => "center",
      y          => "center",
      z          => 0,
      w          => undef,
      h          => undef,
      can_events => 1,
      @_
   }, $class;

   Scalar::Util::weaken ($CFClient::UI::WIDGET{$self+0} = $self);

   for (keys %$self) {
      if (/^on_(.*)$/) {
         $self->connect ($1 => delete $self->{$_});
      }
   }

   if (my $layout = $CFClient::UI::LAYOUT->{$self->{name}}) {
      $self->{x}       = $layout->{x} * $CFClient::UI::ROOT->{alloc_w} if exists $layout->{x};
      $self->{y}       = $layout->{y} * $CFClient::UI::ROOT->{alloc_h} if exists $layout->{y};
      $self->{force_w} = $layout->{w} * $CFClient::UI::ROOT->{alloc_w} if exists $layout->{w};
      $self->{force_h} = $layout->{h} * $CFClient::UI::ROOT->{alloc_h} if exists $layout->{h};

      $self->{x} -= $self->{force_w} * 0.5 if exists $layout->{x};
      $self->{y} -= $self->{force_h} * 0.5 if exists $layout->{y};

      $self->show if $layout->{show};
   }

   $self
}

sub destroy {
   my ($self) = @_;

   $self->hide;
   %$self = ();
}

sub show {
   my ($self) = @_;

   return if $self->{parent};

   $CFClient::UI::ROOT->add ($self);
}

sub set_visible {
   my ($self) = @_;

   return if $self->{visible};

   $self->{root}    = $self->{parent}{root};
   $self->{visible} = $self->{parent}{visible} + 1;

   $self->emit (visibility_change => 1);

   $self->realloc if !exists $self->{req_w};

   $_->set_visible for $self->children;
}

sub set_invisible {
   my ($self) = @_;

   return unless $self->{visible};

   $_->set_invisible for $self->children;

   delete $self->{root};
   delete $self->{visible};

   undef $GRAB  if $GRAB  == $self;
   undef $HOVER if $HOVER == $self;

   CFClient::UI::check_tooltip
      if $TOOLTIP->{owner} == $self;

   $self->focus_out;

   $self->emit (visibility_change => 0);
}

sub set_visibility {
   my ($self, $visible) = @_;

   return if $self->{visible} == $visible;

   $visible ? $self->hide
            : $self->show;
}

sub toggle_visibility {
   my ($self) = @_;

   $self->{visible}
      ? $self->hide
      : $self->show;
}

sub hide {
   my ($self) = @_;

   $self->set_invisible;

   $self->{parent}->remove ($self)
      if $self->{parent};
}

sub move_abs {
   my ($self, $x, $y, $z) = @_;

   $self->{x} = List::Util::max 0, int $x;
   $self->{y} = List::Util::max 0, int $y;
   $self->{z} = $z if defined $z;

   $self->update;
}

sub set_size {
   my ($self, $w, $h) = @_;

   $self->{force_w} = $w;
   $self->{force_h} = $h;

   $self->realloc;
}

sub size_request {
   require Carp;
   Carp::confess "size_request is abstract";
}

sub configure {
   my ($self, $x, $y, $w, $h) = @_;

   if ($self->{aspect}) {
      my ($ow, $oh) = ($w, $h);

      $w = List::Util::min $w, int $h * $self->{aspect};
      $h = List::Util::min $h, int $w / $self->{aspect};

      # use alignment to adjust x, y

      $x += int 0.5 * ($ow - $w);
      $y += int 0.5 * ($oh - $h);
   }

   if ($self->{x} ne $x || $self->{y} ne $y) {
      $self->{x} = $x;
      $self->{y} = $y;
      $self->update;
   }

   if ($self->{alloc_w} != $w || $self->{alloc_h} != $h) {
      return unless $self->{visible};

      $self->{alloc_w} = $w;
      $self->{alloc_h} = $h;

      $self->{root}{size_alloc}{$self+0} = $self;
   }
}

sub size_allocate {
   # nothing to be done
}

sub children {
   # nop
}

sub visible_children {
   $_[0]->children
}

sub set_max_size {
   my ($self, $w, $h) = @_;

   delete $self->{max_w}; $self->{max_w} = $w if $w;
   delete $self->{max_h}; $self->{max_h} = $h if $h;
}

sub set_tooltip {
   my ($self, $tooltip) = @_;

   $tooltip =~ s/^\s+//;
   $tooltip =~ s/\s+$//;

   return if $self->{tooltip} eq $tooltip;

   $self->{tooltip} = $tooltip;

   if ($CFClient::UI::TOOLTIP->{owner} == $self) {
      delete $CFClient::UI::TOOLTIP->{owner};
      CFClient::UI::check_tooltip;
   }
}

# translate global coordinates to local coordinate system
sub coord2local {
   my ($self, $x, $y) = @_;

   $self->{parent}->coord2local ($x  - $self->{x}, $y - $self->{y})
}

# translate local coordinates to global coordinate system
sub coord2global {
   my ($self, $x, $y) = @_;

   $self->{parent}->coord2global ($x + $self->{x}, $y + $self->{y})
}

sub focus_in {
   my ($self) = @_;

   return if $FOCUS == $self;
   return unless $self->{can_focus};

   my $focus = $FOCUS; $FOCUS = $self;

   $self->_emit (focus_in => $focus);

   $focus->update if $focus;
   $FOCUS->update;
}

sub focus_out {
   my ($self) = @_;

   return unless $FOCUS == $self;

   my $focus = $FOCUS; undef $FOCUS;

   $self->_emit (focus_out => $focus);

   $focus->update if $focus; #?

   $::MAPWIDGET->focus_in #d# focus mapwidget if no other widget has focus
      unless $FOCUS;
}

sub mouse_motion { 0 }
sub button_up    { 0 }
sub key_down     { 0 }
sub key_up       { 0 }

sub button_down {
   my ($self, $ev, $x, $y) = @_;

   $self->focus_in;

   0
}

sub find_widget {
   my ($self, $x, $y) = @_;

   return () unless $self->{can_events};

   return $self
      if $x >= $self->{x} && $x < $self->{x} + $self->{w}
          && $y >= $self->{y} && $y < $self->{y} + $self->{h};

   ()
}

sub set_parent {
   my ($self, $parent) = @_;

   Scalar::Util::weaken ($self->{parent} = $parent);
   $self->set_visible if $parent->{visible};
}

sub connect {
   my ($self, $signal, $cb) = @_;

   push @{ $self->{signal_cb}{$signal} }, $cb;
}

sub _emit {
   my ($self, $signal, @args) = @_;

   List::Util::sum map $_->($self, @args), @{$self->{signal_cb}{$signal} || []}
}

sub emit {
   my ($self, $signal, @args) = @_;

   $self->_emit ($signal, @args)
      || $self->$signal (@args);
}

sub visibility_change {
   #my ($self, $visible) = @_;
}

sub realloc {
   my ($self) = @_;

   if ($self->{visible}) {
      return if $self->{root}{realloc}{$self+0};

      $self->{root}{realloc}{$self+0} = $self;
      $self->{root}->update;
   } else {
      delete $self->{req_w};
      delete $self->{req_h};
   }
}

sub update {
   my ($self) = @_;

   $self->{parent}->update
      if $self->{parent};
}

sub reconfigure {
   my ($self) = @_;

   $self->realloc;
   $self->update;
}

# using global variables seems a bit hacky, but passing through all drawing
# functions seems pointless.
our ($draw_x, $draw_y, $draw_w, $draw_h); # screen rectangle being drawn

sub draw {
   my ($self) = @_;

   return unless $self->{h} && $self->{w};

   # update screen rectangle
   local $draw_x = $draw_x + $self->{x};
   local $draw_y = $draw_y + $self->{y};
   local $draw_w = $draw_x + $self->{w};
   local $draw_h = $draw_y + $self->{h};

   # skip widgets that are entirely outside the drawing area
   return if ($draw_x + $self->{w} < 0) || ($draw_x >= $draw_w)
          || ($draw_y + $self->{h} < 0) || ($draw_y >= $draw_h);

   glPushMatrix;
   glTranslate $self->{x}, $self->{y}, 0;
   $self->_draw;
   glPopMatrix;

   if ($self == $HOVER && $self->{can_hover}) {
      my ($x, $y) = @$self{qw(x y)};

      glColor 1, 0.8, 0.5, 0.2;
      glEnable GL_BLEND;
      glBlendFunc GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA;
      glBegin GL_QUADS;
      glVertex $x             , $y;
      glVertex $x + $self->{w}, $y;
      glVertex $x + $self->{w}, $y + $self->{h};
      glVertex $x             , $y + $self->{h};
      glEnd;
      glDisable GL_BLEND;
   }

   if ($ENV{CFPLUS_DEBUG} & 1) {
      glPushMatrix;
      glColor 1, 1, 0, 1;
      glTranslate $self->{x} + 0.375, $self->{y} + 0.375;
      glBegin GL_LINE_LOOP;
      glVertex 0             , 0;
      glVertex $self->{w} - 1, 0;
      glVertex $self->{w} - 1, $self->{h} - 1;
      glVertex 0             , $self->{h} - 1;
      glEnd;
      glPopMatrix;
      #CFClient::UI::Label->new (w => $self->{w}, h => $self->{h}, text => $self, fontsize => 0)->_draw;
   }
}

sub _draw {
   my ($self) = @_;

   warn "no draw defined for $self\n";
}

sub DESTROY {
   my ($self) = @_;

   delete $WIDGET{$self+0};
   #$self->deactivate;
}

#############################################################################

package CFClient::UI::DrawBG;

our @ISA = CFClient::UI::Base::;

use strict;
use CFClient::OpenGL;

sub new {
   my $class = shift;

   # range [value, low, high, page]

   $class->SUPER::new (
      #bg        => [0, 0, 0, 0.2],
      #active_bg => [1, 1, 1, 0.5],
      @_
   )
}

sub _draw {
   my ($self) = @_;

   my $color = $FOCUS == $self && $self->{active_bg}
             ? $self->{active_bg}
             : $self->{bg};

   if ($color && (@$color < 4 || $color->[3])) {
      my ($w, $h) = @$self{qw(w h)};

      glEnable GL_BLEND;
      glBlendFunc GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA;
      glColor @$color;

      glBegin GL_QUADS;
      glVertex 0 , 0;
      glVertex 0 , $h;
      glVertex $w, $h;
      glVertex $w, 0;
      glEnd;

      glDisable GL_BLEND;
   }
}

#############################################################################

package CFClient::UI::Empty;

our @ISA = CFClient::UI::Base::;

sub new {
   my ($class, %arg) = @_;
   $class->SUPER::new (can_events => 0, %arg);
}

sub size_request {
   my ($self) = @_;

   ($self->{w} + 0, $self->{h} + 0)
}

sub draw { }

#############################################################################

package CFClient::UI::Container;

our @ISA = CFClient::UI::Base::;

sub new {
   my ($class, %arg) = @_;

   my $children = delete $arg{children};

   my $self = $class->SUPER::new (
      children   => [],
      can_events => 0,
      %arg,
   );

   $self->add (@$children)
      if $children;

   $self
}

sub add {
   my ($self, @widgets) = @_;

   $_->set_parent ($self)
      for @widgets;

   use sort 'stable';

   $self->{children} = [
      sort { $a->{z} <=> $b->{z} }
         @{$self->{children}}, @widgets
   ];

   $self->realloc;
}

sub children {
   @{ $_[0]{children} }
}

sub remove {
   my ($self, $child) = @_;

   delete $child->{parent};
   $child->hide;

   $self->{children} = [ grep $_ != $child, @{ $self->{children} } ];

   $self->realloc;
}

sub clear {
   my ($self) = @_;

   my $children = delete $self->{children};
   $self->{children} = [];

   for (@$children) {
      delete $_->{parent};
      $_->hide;
   }

   $self->realloc;
}

sub find_widget {
   my ($self, $x, $y) = @_;

   $x -= $self->{x};
   $y -= $self->{y};

   my $res;

   for (reverse $self->visible_children) {
      $res = $_->find_widget ($x, $y)
         and return $res;
   }

   $self->SUPER::find_widget ($x + $self->{x}, $y + $self->{y})
}

sub _draw {
   my ($self) = @_;

   $_->draw for @{$self->{children}};
}

#############################################################################

package CFClient::UI::Bin;

our @ISA = CFClient::UI::Container::;

sub new {
   my ($class, %arg) = @_;

   my $child = (delete $arg{child}) || new CFClient::UI::Empty::;

   $class->SUPER::new (children => [$child], %arg)
}

sub add {
   my ($self, $child) = @_;

   $self->{children} = [];
   
   $self->SUPER::add ($child);
}

sub remove {
   my ($self, $widget) = @_;

   $self->SUPER::remove ($widget);

   $self->{children} = [new CFClient::UI::Empty]
      unless @{$self->{children}};
}

sub child { $_[0]->{children}[0] }

sub size_request {
   $_[0]{children}[0]->size_request
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   $self->{children}[0]->configure (0, 0, $w, $h);
}

#############################################################################

# back-buffered drawing area

package CFClient::UI::Window;

our @ISA = CFClient::UI::Bin::;

use CFClient::OpenGL;

sub new {
   my ($class, %arg) = @_;

   my $self = $class->SUPER::new (%arg);
}

sub update {
   my ($self) = @_;

   $ROOT->on_post_alloc ($self => sub { $self->render_child });
   $self->SUPER::update;
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   $self->SUPER::size_allocate ($w, $h);
   $self->update;
}

sub _render {
   my ($self) = @_;

   $self->{children}[0]->draw;
}

sub render_child {
   my ($self) = @_;

   $self->{texture} = new_from_opengl CFClient::Texture $self->{w}, $self->{h}, sub {
      glClearColor 0, 0, 0, 0;
      glClear GL_COLOR_BUFFER_BIT;

      {
         package CFClient::UI::Base;

         ($draw_x, $draw_y, $draw_w, $draw_h) =
            (0, 0, $self->{w}, $self->{h});
      }

      $self->_render;
   };
}

sub _draw {
   my ($self) = @_;

   my ($w, $h) = @$self{qw(w h)};

   my $tex = $self->{texture}
      or return;

   glEnable GL_TEXTURE_2D;
   glTexEnv GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE;
   glColor 1, 1, 1, 1;

   $tex->draw_quad_alpha_premultiplied (0, 0, $w, $h);

   glDisable GL_TEXTURE_2D;
}

#############################################################################

package CFClient::UI::ViewPort;

our @ISA = CFClient::UI::Window::;

sub new {
   my $class = shift;

   $class->SUPER::new (
      scroll_x => 0,
      scroll_y => 1,
      @_,
   )
}

sub size_request {
   my ($self) = @_;

   my ($w, $h) = @{$self->child}{qw(req_w req_h)};

   $w = 10 if $self->{scroll_x};
   $h = 10 if $self->{scroll_y};

   ($w, $h)
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   my $child = $self->child;

   $w = $child->{req_w} if $self->{scroll_x} && $child->{req_w};
   $h = $child->{req_h} if $self->{scroll_y} && $child->{req_h};

   $self->child->configure (0, 0, $w, $h);
   $self->update;
}

sub set_offset {
   my ($self, $x, $y) = @_;

   $self->{view_x} = int $x;
   $self->{view_y} = int $y;

   $self->update;
}

# hmm, this does not work for topleft of $self... but we should not ask for that
sub coord2local {
   my ($self, $x, $y) = @_;

   $self->SUPER::coord2local ($x + $self->{view_x}, $y + $self->{view_y})
}

sub coord2global {
   my ($self, $x, $y) = @_;

   $x = List::Util::min $self->{w}, $x - $self->{view_x};
   $y = List::Util::min $self->{h}, $y - $self->{view_y};

   $self->SUPER::coord2global ($x, $y)
}

sub find_widget {
   my ($self, $x, $y) = @_;

   if (   $x >= $self->{x} && $x < $self->{x} + $self->{w}
       && $y >= $self->{y} && $y < $self->{y} + $self->{h}
   ) {
       $self->child->find_widget ($x + $self->{view_x}, $y + $self->{view_y})
   } else {
      $self->CFClient::UI::Base::find_widget ($x, $y)
   }
}

sub _render {
   my ($self) = @_;

   local $CFClient::UI::Base::draw_x = $CFClient::UI::Base::draw_x - $self->{view_x};
   local $CFClient::UI::Base::draw_y = $CFClient::UI::Base::draw_y - $self->{view_y};

   CFClient::OpenGL::glTranslate -$self->{view_x}, -$self->{view_y};

   $self->SUPER::_render;
}

#############################################################################

package CFClient::UI::ScrolledWindow;

our @ISA = CFClient::UI::HBox::;

sub new {
   my ($class, %arg) = @_;

   my $child = delete $arg{child};

   my $self;

   my $slider = new CFClient::UI::Slider
      vertical   => 1,
      range      => [0, 0, 1, 0.01], # HACK fix
      on_changed => sub {
         $self->{vp}->set_offset (0, $_[1]);
      },
   ;

   $self = $class->SUPER::new (
      vp     => (new CFClient::UI::ViewPort expand => 1),
      slider => $slider,
      %arg,
   );

   $self->SUPER::add ($self->{vp}, $self->{slider});
   $self->add ($child) if $child;

   $self
}

sub add {
   my ($self, $widget) = @_;

   $self->{vp}->add ($self->{child} = $widget);
}

sub update {
   my ($self) = @_;

   $self->SUPER::update;

   # todo: overwrite size_allocate of child
   my $child = $self->{vp}->child;
   $self->{slider}->set_range ([$self->{slider}{range}[0], 0, $child->{h}, $self->{vp}{h}, 1]);
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   $self->SUPER::size_allocate ($w, $h);

   my $child = $self->{vp}->child;
   $self->{slider}->set_range ([$self->{slider}{range}[0], 0, $child->{h}, $self->{vp}{h}, 1]);
}

#TODO# update range on size_allocate depending on child
# update viewport offset on scroll

#############################################################################

package CFClient::UI::Frame;

our @ISA = CFClient::UI::Bin::;

use CFClient::OpenGL;

sub new {
   my $class = shift;

   $class->SUPER::new (
      bg => undef,
      @_,
   )
}

sub _draw {
   my ($self) = @_;

   if ($self->{bg}) {
      my ($w, $h) = @$self{qw(w h)};

      glEnable GL_BLEND;
      glBlendFunc GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA;
      glColor @{ $self->{bg} };

      glBegin GL_QUADS;
      glVertex 0 , 0;
      glVertex 0 , $h;
      glVertex $w, $h;
      glVertex $w, 0;
      glEnd;

      glDisable GL_BLEND;
   }

   $self->SUPER::_draw;
}

#############################################################################

package CFClient::UI::FancyFrame;

our @ISA = CFClient::UI::Bin::;

use CFClient::OpenGL;

my $bg = 
      new_from_file CFClient::Texture CFClient::find_rcfile "d1_bg.png",
         mipmap => 1, wrap => 1;

my @border = 
      map { new_from_file CFClient::Texture CFClient::find_rcfile $_, mipmap => 1 }
         qw(d1_border_top.png d1_border_right.png d1_border_left.png d1_border_bottom.png);

sub new {
   my ($class, %arg) = @_;

   my $title = delete $arg{title};

   my $self = $class->SUPER::new (
      bg          => [1, 1, 1, 1],
      border_bg   => [1, 1, 1, 1],
      border      => 0.6,
      can_events  => 1,
      min_w       => 16,
      min_h       => 16,
      %arg,
   );

   $self->{title} = new CFClient::UI::Label
      align    => 0,
      valign   => 1,
      text     => $title,
      fontsize => $self->{border}
         if defined $title;

   $self
}

sub add {
   my ($self, @widgets) = @_;

   $self->SUPER::add (@widgets);
   $self->CFClient::UI::Container::add ($self->{title}) if $self->{title};
}

sub border {
   int $_[0]{border} * $::FONTSIZE
}

sub size_request {
   my ($self) = @_;

   $self->{title}->size_request
      if $self->{title};

   my ($w, $h) = $self->SUPER::size_request;

   (
      $w + $self->border * 2,
      $h + $self->border * 2,
   )
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   if ($self->{title}) {
      $self->{title}{w} = $w;
      $self->{title}{h} = $h;
      $self->{title}->size_allocate ($w, $h);
   }

   my $border = $self->border;

   $h -= List::Util::max 0, $border * 2;
   $w -= List::Util::max 0, $border * 2;
   
   $self->child->configure ($border, $border, $w, $h);
}

sub button_down {
   my ($self, $ev, $x, $y) = @_;

   my ($w, $h) = @$self{qw(w h)};
   my $border = $self->border;

   my $lr = ($x >= 0 && $x < $border) || ($x > $w - $border && $x < $w);
   my $td = ($y >= 0 && $y < $border) || ($y > $h - $border && $y < $h);

   if ($lr & $td) {
      my ($wx, $wy) = ($self->{x}, $self->{y});
      my ($ox, $oy) = ($ev->{x}, $ev->{y});
      my ($bw, $bh) = ($self->{w}, $self->{h});

      my $mx = $x < $border;
      my $my = $y < $border;

      $self->{motion} = sub {
         my ($ev, $x, $y) = @_;

         my $dx = $ev->{x} - $ox;
         my $dy = $ev->{y} - $oy;

         $self->{force_w} = $bw + $dx * ($mx ? -1 : 1);
         $self->{force_h} = $bh + $dy * ($my ? -1 : 1);

         $self->move_abs ($wx + $dx * $mx, $wy + $dy * $my);
         $self->realloc;
      };

   } elsif ($lr ^ $td) {
      my ($ox, $oy) = ($ev->{x}, $ev->{y});
      my ($bx, $by) = ($self->{x}, $self->{y});

      $self->{motion} = sub {
         my ($ev, $x, $y) = @_;

         ($x, $y) = ($ev->{x}, $ev->{y});

         $self->move_abs ($bx + $x - $ox, $by + $y - $oy);
         # HACK: the next line is required to enforce placement
         $self->{parent}->size_allocate ($self->{parent}{w}, $self->{parent}{h});
      };
   } else {
      return 0;
   }

   1
}

sub button_up {
   my ($self, $ev, $x, $y) = @_;

   !!delete $self->{motion}
}

sub mouse_motion {
   my ($self, $ev, $x, $y) = @_;

   $self->{motion}->($ev, $x, $y) if $self->{motion};

   !!$self->{motion}
}

sub _draw {
   my ($self) = @_;

   my $child = $self->{children}[0];

   my ($w,  $h ) = ($self->{w}, $self->{h});
   my ($cw, $ch) = ($child->{w}, $child->{h});

   glEnable GL_TEXTURE_2D;
   glTexEnv GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE;

   my $border = $self->border;

   glColor @{ $self->{border_bg} };
   $border[0]->draw_quad_alpha (0, 0, $w, $border);
   $border[1]->draw_quad_alpha (0, $border, $border, $ch);
   $border[2]->draw_quad_alpha ($w - $border, $border, $border, $ch);
   $border[3]->draw_quad_alpha (0, $h - $border, $w, $border);

   if (@{$self->{bg}} < 4 || $self->{bg}[3]) {
      glColor @{ $self->{bg} };

      # TODO: repeat texture not scale
      # solve this better(?)
      $bg->{s} = $cw / $bg->{w};
      $bg->{t} = $ch / $bg->{h};
      $bg->draw_quad_alpha ($border, $border, $cw, $ch);
   }

   glDisable GL_TEXTURE_2D;

   $child->draw;

   if ($self->{title}) {
      glTranslate 0, $border - $self->{h};
      $self->{title}->_draw;
   }
}

#############################################################################

package CFClient::UI::Table;

our @ISA = CFClient::UI::Base::;

use List::Util qw(max sum);

use CFClient::OpenGL;

sub new {
   my $class = shift;

   $class->SUPER::new (
      col_expand => [],
      @_,
   )
}

sub children {
   grep $_, map @$_, grep $_, @{ $_[0]{children} }
}

sub add {
   my ($self, $x, $y, $child) = @_;

   $child->set_parent ($self);
   $self->{children}[$y][$x] = $child;

   $self->realloc;
}

# TODO: move to container class maybe? send children a signal on removal?
sub clear {
   my ($self) = @_;

   my @children = $self->children;
   delete $self->{children};
   
   for (@children) {
      delete $_->{parent};
      $_->hide;
   }

   $self->realloc;
}

sub get_wh {
   my ($self) = @_;

   my (@w, @h);

   for my $y (0 .. $#{$self->{children}}) {
      my $row = $self->{children}[$y]
         or next;

      for my $x (0 .. $#$row) {
         my $widget = $row->[$x]
            or next;
         my ($w, $h) = @$widget{qw(req_w req_h)};

         $w[$x] = max $w[$x], $w;
         $h[$y] = max $h[$y], $h;
      }
   }

   (\@w, \@h)
}

sub size_request {
   my ($self) = @_;

   my ($ws, $hs) = $self->get_wh;

   (
      (sum @$ws),
      (sum @$hs),
   )
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   my ($ws, $hs) = $self->get_wh;

   my $req_w = (sum @$ws) || 1;
   my $req_h = (sum @$hs) || 1;

   # TODO: nicer code && do row_expand
   my @col_expand = @{$self->{col_expand}};
   @col_expand = (1) x @$ws unless @col_expand;
   my $col_expand = (sum @col_expand) || 1;

   # linearly scale sizes
   $ws->[$_] += $col_expand[$_] / $col_expand * ($w - $req_w) for 0 .. $#$ws;
   $hs->[$_] *= 1 * $h / $req_h for 0 .. $#$hs;

   CFClient::UI::harmonize $ws;
   CFClient::UI::harmonize $hs;

   my $y;

   for my $r (0 .. $#{$self->{children}}) {
      my $row = $self->{children}[$r]
         or next;

      my $x = 0;
      my $row_h = $hs->[$r];
      
      for my $c (0 .. $#$row) {
         my $col_w = $ws->[$c];

         if (my $widget = $row->[$c]) {
            $widget->configure ($x, $y, $col_w, $row_h);
         }

         $x += $col_w;
      }

      $y += $row_h;
   }

}

sub find_widget {
   my ($self, $x, $y) = @_;

   $x -= $self->{x};
   $y -= $self->{y};

   my $res;

   for (grep $_, map @$_, grep $_, @{ $self->{children} }) {
      $res = $_->find_widget ($x, $y)
         and return $res;
   }

   $self->SUPER::find_widget ($x + $self->{x}, $y + $self->{y})
}

sub _draw {
   my ($self) = @_;

   for (grep $_, @{$self->{children}}) {
      $_->draw for grep $_, @$_;
   }
}

#############################################################################

package CFClient::UI::Box;

our @ISA = CFClient::UI::Container::;

sub size_request {
   my ($self) = @_;

   $self->{vertical}
      ?  (
            (List::Util::max map $_->{req_w}, @{$self->{children}}),
            (List::Util::sum map $_->{req_h}, @{$self->{children}}),
         )
      :  (
            (List::Util::sum map $_->{req_w}, @{$self->{children}}),
            (List::Util::max map $_->{req_h}, @{$self->{children}}),
         )
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   my $space = $self->{vertical} ? $h : $w;
   my $children = $self->{children};

   my @req;

   if ($self->{homogeneous}) {
      @req = ($space / (@$children || 1)) x @$children;
   } else {
      @req = map $_->{$self->{vertical} ? "req_h" : "req_w"}, @$children;
      my $req = List::Util::sum @req;

      if ($req > $space) {
         # ah well, not enough space
         $_ *= $space / $req for @req;
      } else {
         my $expand = (List::Util::sum map $_->{expand}, @$children) || 1;
         
         $space = ($space - $req) / $expand; # remaining space to give away

         $req[$_] += $space * $children->[$_]{expand}
            for 0 .. $#$children;
      }
   }

   CFClient::UI::harmonize \@req;

   my $pos = 0;
   for (0 .. $#$children) {
      my $alloc = $req[$_];
      $children->[$_]->configure ($self->{vertical} ? (0, $pos, $w, $alloc) : ($pos, 0, $alloc, $h));

      $pos += $alloc;
   }

   1
}

#############################################################################

package CFClient::UI::HBox;

our @ISA = CFClient::UI::Box::;

sub new {
   my $class = shift;

   $class->SUPER::new (
      vertical => 0,
      @_,
   )
}

#############################################################################

package CFClient::UI::VBox;

our @ISA = CFClient::UI::Box::;

sub new {
   my $class = shift;

   $class->SUPER::new (
      vertical => 1,
      @_,
   )
}

#############################################################################

package CFClient::UI::Label;

our @ISA = CFClient::UI::DrawBG::;

use CFClient::OpenGL;

sub new {
   my ($class, %arg) = @_;

   my $self = $class->SUPER::new (
      fg         => [1, 1, 1],
      #bg        => none
      #active_bg => none
      #font      => default_font
      #text      => initial text
      #markup    => initial narkup
      #max_w     => maximum pixel width
      ellipsise  => 3, # end
      layout     => (new CFClient::Layout),
      fontsize   => 1,
      align      => -1,
      valign     => -1,
      padding_x  => 2,
      padding_y  => 2,
      can_events => 0,
      %arg
   );

   if (exists $self->{template}) {
      my $layout = new CFClient::Layout;
      $layout->set_text (delete $self->{template});
      $self->{template} = $layout;
   }

   if (exists $self->{markup}) {
      $self->set_markup (delete $self->{markup});
   } else {
      $self->set_text (delete $self->{text});
   }

   $self
}

sub escape($) {
   local $_ = $_[0];

   s/&/&amp;/g;
   s/>/&gt;/g;
   s/</&lt;/g;

   $_
}

sub update {
   my ($self) = @_;

   delete $self->{texture};
   $self->SUPER::update;
}

sub set_text {
   my ($self, $text) = @_;

   return if $self->{text} eq "T$text";
   $self->{text} = "T$text";

   $self->{layout} = new CFClient::Layout if $self->{layout}->is_rgba;
   $self->{layout}->set_text ($text);

   $self->realloc;
   $self->update;
}

sub set_markup {
   my ($self, $markup) = @_;

   return if $self->{text} eq "M$markup";
   $self->{text} = "M$markup";

   my $rgba = $markup =~ /span.*(?:foreground|background)/;

   $self->{layout} = new CFClient::Layout $rgba if $self->{layout}->is_rgba != $rgba;
   $self->{layout}->set_markup ($markup);

   $self->realloc;
   $self->update;
}

sub size_request {
   my ($self) = @_;

   $self->{layout}->set_font ($self->{font}) if $self->{font};
   $self->{layout}->set_width ($self->{max_w} || -1);
   $self->{layout}->set_ellipsise ($self->{ellipsise});
   $self->{layout}->set_single_paragraph_mode ($self->{ellipsise});
   $self->{layout}->set_height ($self->{fontsize} * $::FONTSIZE);

   my ($w, $h) = $self->{layout}->size;

   if (exists $self->{template}) {
      $self->{template}->set_font ($self->{font}) if $self->{font};
      $self->{template}->set_height ($self->{fontsize} * $::FONTSIZE);

      my ($w2, $h2) = $self->{template}->size;

      $w = List::Util::max $w, $w2;
      $h = List::Util::max $h, $h2;
   }

   ($w, $h)
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   delete $self->{ox};

   delete $self->{texture}
      unless $w >= $self->{req_w} && $self->{old_w} >= $self->{req_w};
}

sub set_fontsize {
   my ($self, $fontsize) = @_;

   $self->{fontsize} = $fontsize;
   delete $self->{texture};

   $self->realloc;
}

sub _draw {
   my ($self) = @_;

   $self->SUPER::_draw; # draw background, if applicable

   my $tex = $self->{texture} ||= do {
      $self->{layout}->set_foreground (@{$self->{fg}});
      $self->{layout}->set_font ($self->{font}) if $self->{font};
      $self->{layout}->set_width ($self->{w});
      $self->{layout}->set_ellipsise ($self->{ellipsise});
      $self->{layout}->set_single_paragraph_mode ($self->{ellipsise});
      $self->{layout}->set_height ($self->{fontsize} * $::FONTSIZE);

      new_from_layout CFClient::Texture $self->{layout}
   };

   unless (exists $self->{ox}) {
      $self->{ox} = int ($self->{align} < 0 ? $self->{padding_x}
                       : $self->{align} > 0 ? $self->{w} - $tex->{w} - $self->{padding_x}
                       :                      ($self->{w} - $tex->{w}) * 0.5);

      $self->{oy} = int ($self->{valign} < 0 ? $self->{padding_y}
                       : $self->{valign} > 0 ? $self->{h} - $tex->{h} - $self->{padding_y}
                       :                       ($self->{h} - $tex->{h}) * 0.5);
   };

   glEnable GL_TEXTURE_2D;
   glTexEnv GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE;

   if ($tex->{format} == GL_ALPHA) {
      glColor @{$self->{fg}};
      $tex->draw_quad_alpha ($self->{ox}, $self->{oy});
   } else {
      $tex->draw_quad_alpha_premultiplied ($self->{ox}, $self->{oy});
   }

   glDisable GL_TEXTURE_2D;
}

#############################################################################

package CFClient::UI::EntryBase;

our @ISA = CFClient::UI::Label::;

use CFClient::OpenGL;

sub new {
   my $class = shift;

   $class->SUPER::new (
      fg         => [1, 1, 1],
      bg         => [0, 0, 0, 0.2],
      active_bg  => [1, 1, 1, 0.5],
      active_fg  => [0, 0, 0],
      can_hover  => 1,
      can_focus  => 1,
      valign     => 0,
      can_events => 1,
      #text      => ...
      @_
   )
}

sub _set_text {
   my ($self, $text) = @_;

   delete $self->{cur_h};

   return if $self->{text} eq $text;

   $self->{last_activity} = $::NOW;
   $self->{text} = $text;

   $text =~ s/./*/g if $self->{hidden};
   $self->{layout}->set_text ("$text ");

   $self->_emit (changed => $self->{text});
   $self->update;
}

sub set_text {
   my ($self, $text) = @_;

   $self->{cursor} = length $text;
   $self->_set_text ($text);

   $self->realloc;
}

sub get_text {
   $_[0]{text}
}

sub size_request {
   my ($self) = @_;

   my ($w, $h) = $self->SUPER::size_request;

   ($w + 1, $h) # add 1 for cursor
}

sub key_down {
   my ($self, $ev) = @_;

   my $mod = $ev->{mod};
   my $sym = $ev->{sym};
   my $uni = $ev->{unicode};

   my $text = $self->get_text;

   if ($uni == 8) {
      substr $text, --$self->{cursor}, 1, "" if $self->{cursor};
   } elsif ($uni == 127) {
      substr $text, $self->{cursor}, 1, "";
   } elsif ($sym == CFClient::SDLK_LEFT) {
      --$self->{cursor} if $self->{cursor};
   } elsif ($sym == CFClient::SDLK_RIGHT) {
      ++$self->{cursor} if $self->{cursor} < length $self->{text};
   } elsif ($sym == CFClient::SDLK_HOME) {
      $self->{cursor} = 0;
   } elsif ($sym == CFClient::SDLK_END) {
      $self->{cursor} = length $text;
   } elsif ($uni == 27) {
      $self->_emit ('escape');
   } elsif ($uni) {
      substr $text, $self->{cursor}++, 0, chr $uni;
   } else {
      return 0;
   }

   $self->_set_text ($text);

   $self->realloc;

   1
}

sub focus_in {
   my ($self) = @_;

   $self->{last_activity} = $::NOW;

   $self->SUPER::focus_in;
}

sub button_down {
   my ($self, $ev, $x, $y) = @_;

   $self->SUPER::button_down ($ev, $x, $y);

   my $idx = $self->{layout}->xy_to_index ($x, $y);

   # byte-index to char-index
   my $text = $self->{text};
   utf8::encode $text;
   $self->{cursor} = length substr $text, 0, $idx;

   $self->_set_text ($self->{text});
   $self->update;
   
   1
}

sub mouse_motion {
   my ($self, $ev, $x, $y) = @_;
#   printf "M %d,%d %d,%d\n", $ev->motion_x, $ev->motion_y, $x, $y;#d#

   0
}

sub _draw {
   my ($self) = @_;

   local $self->{fg} = $self->{fg};

   if ($FOCUS == $self) {
      glColor @{$self->{active_bg}};
      $self->{fg} = $self->{active_fg};
   } else {
      glColor @{$self->{bg}};
   }

   glEnable GL_BLEND;
   glBlendFunc GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA;
   glBegin GL_QUADS;
   glVertex 0         , 0;
   glVertex 0         , $self->{h};
   glVertex $self->{w}, $self->{h};
   glVertex $self->{w}, 0;
   glEnd;
   glDisable GL_BLEND;

   $self->SUPER::_draw;

   #TODO: force update every cursor change :(
   if ($FOCUS == $self && (($::NOW - $self->{last_activity}) & 1023) < 600) {

      unless (exists $self->{cur_h}) {
         my $text = substr $self->{text}, 0, $self->{cursor};
         utf8::encode $text;

         @$self{qw(cur_x cur_y cur_h)} = $self->{layout}->cursor_pos (length $text)
      }

      glColor @{$self->{fg}};
      glBegin GL_LINES;
      glVertex $self->{cur_x} + $self->{ox}, $self->{cur_y} + $self->{oy};
      glVertex $self->{cur_x} + $self->{ox}, $self->{cur_y} + $self->{oy} + $self->{cur_h};
      glEnd;
   }
}

package CFClient::UI::Entry;

our @ISA = CFClient::UI::EntryBase::;

use CFClient::OpenGL;

sub key_down {
   my ($self, $ev) = @_;

   my $sym = $ev->{sym};

   if ($sym == 13) {
      unshift @{$self->{history}},
         my $txt = $self->get_text;
      $self->{history_pointer} = -1;
      $self->{history_saveback} = '';
      $self->_emit (activate => $txt);
      $self->update;

   } elsif ($sym == CFClient::SDLK_UP) {
      if ($self->{history_pointer} < 0) {
         $self->{history_saveback} = $self->get_text;
      }
      if (@{$self->{history} || []} > 0) {
         $self->{history_pointer}++;
         if ($self->{history_pointer} >= @{$self->{history} || []}) {
            $self->{history_pointer} = @{$self->{history} || []} - 1;
         }
         $self->set_text ($self->{history}->[$self->{history_pointer}]);
      }

   } elsif ($sym == CFClient::SDLK_DOWN) {
      $self->{history_pointer}--;
      $self->{history_pointer} = -1 if $self->{history_pointer} < 0;

      if ($self->{history_pointer} >= 0) {
         $self->set_text ($self->{history}->[$self->{history_pointer}]);
      } else {
         $self->set_text ($self->{history_saveback});
      }

   } else {
      return $self->SUPER::key_down ($ev)
   }

   1
}

#############################################################################

package CFClient::UI::Button;

our @ISA = CFClient::UI::Label::;

use CFClient::OpenGL;

my @tex =
      map { new_from_file CFClient::Texture CFClient::find_rcfile $_, mipmap => 1 }
         qw(b1_button_active.png);

sub new {
   my $class = shift;

   $class->SUPER::new (
      padding_x  => 4,
      padding_y  => 4,
      fg         => [1, 1, 1],
      active_fg  => [0, 0, 1],
      can_hover  => 1,
      align      => 0,
      valign     => 0,
      can_events => 1,
      @_
   )
}

sub activate { }

sub button_up {
   my ($self, $ev, $x, $y) = @_;

   $self->emit ("activate")
      if $x >= 0 && $x < $self->{w}
         && $y >= 0 && $y < $self->{h};

   1
}

sub _draw {
   my ($self) = @_;

   local $self->{fg} = $self->{fg};

   if ($GRAB == $self) {
      $self->{fg} = $self->{active_fg};
   }

   glEnable GL_TEXTURE_2D;
   glTexEnv GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE;
   glColor 0, 0, 0, 1;

   $tex[0]->draw_quad_alpha (0, 0, $self->{w}, $self->{h});

   glDisable GL_TEXTURE_2D;

   $self->SUPER::_draw;
}

#############################################################################

package CFClient::UI::CheckBox;

our @ISA = CFClient::UI::DrawBG::;

my @tex =
      map { new_from_file CFClient::Texture CFClient::find_rcfile $_, mipmap => 1 }
         qw(c1_checkbox_bg.png c1_checkbox_active.png);

use CFClient::OpenGL;

sub new {
   my $class = shift;

   $class->SUPER::new (
      padding_x => 2,
      padding_y => 2,
      fg        => [1, 1, 1],
      active_fg => [1, 1, 0],
      bg        => [0, 0, 0, 0.2],
      active_bg => [1, 1, 1, 0.5],
      state     => 0,
      can_hover => 1,
      @_
   )
}

sub size_request {
   my ($self) = @_;

   (6) x 2
}

sub button_down {
   my ($self, $ev, $x, $y) = @_;

   if ($x >= $self->{padding_x} && $x < $self->{w} - $self->{padding_x}
       && $y >= $self->{padding_y} && $y < $self->{h} - $self->{padding_y}) {
      $self->{state} = !$self->{state};
      $self->_emit (changed => $self->{state});
   } else {
      return 0
   }

   1
}

sub _draw {
   my ($self) = @_;

   $self->SUPER::_draw;

   glTranslate $self->{padding_x} + 0.375, $self->{padding_y} + 0.375, 0;

   my ($w, $h) = @$self{qw(w h)};

   my $s = List::Util::min $w - $self->{padding_x} * 2, $h - $self->{padding_y} * 2;

   glColor @{ $FOCUS == $self ? $self->{active_fg} : $self->{fg} };

   my $tex = $self->{state} ? $tex[1] : $tex[0];

   glEnable GL_TEXTURE_2D;
   $tex->draw_quad_alpha (0, 0, $s, $s);
   glDisable GL_TEXTURE_2D;
}

#############################################################################

package CFClient::UI::Image;

our @ISA = CFClient::UI::Base::;

use CFClient::OpenGL;
use Carp qw/confess/;

our %loaded_images;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (can_events => 0, @_);

   $self->{image} or confess "Image has 'image' not set. This is a fatal error!";

   $loaded_images{$self->{image}} ||=
      new_from_file CFClient::Texture CFClient::find_rcfile $self->{image}, mipmap => 1;

   my $tex = $self->{tex} = $loaded_images{$self->{image}};

   Scalar::Util::weaken $loaded_images{$self->{image}};

   $self->{aspect} = $tex->{w} / $tex->{h};

   $self
}

sub size_request {
   my ($self) = @_;

   ($self->{tex}->{w}, $self->{tex}->{h})
}

sub _draw {
   my ($self) = @_;

   my $tex = $self->{tex};

   my ($w, $h) = ($self->{w}, $self->{h});

   if ($self->{rot90}) {
      glRotate 90, 0, 0, 1;
      glTranslate 0, -$self->{w}, 0;

      ($w, $h) = ($h, $w);
   }

   glEnable GL_TEXTURE_2D;
   glTexEnv GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE;

   $tex->draw_quad_alpha (0, 0, $w, $h);

   glDisable GL_TEXTURE_2D;
}

#############################################################################

package CFClient::UI::VGauge;

our @ISA = CFClient::UI::Base::;

use List::Util qw(min max);

use CFClient::OpenGL;

my %tex = (
   food => [
      map { new_from_file CFClient::Texture CFClient::find_rcfile $_, mipmap => 1 }
         qw/g1_food_gauge_empty.png g1_food_gauge_full.png/
   ],
   grace => [
      map { new_from_file CFClient::Texture CFClient::find_rcfile $_, mipmap => 1 }
         qw/g1_grace_gauge_empty.png g1_grace_gauge_full.png g1_grace_gauge_overflow.png/
   ],
   hp => [
      map { new_from_file CFClient::Texture CFClient::find_rcfile $_, mipmap => 1 }
         qw/g1_hp_gauge_empty.png g1_hp_gauge_full.png/
   ],
   mana => [
      map { new_from_file CFClient::Texture CFClient::find_rcfile $_, mipmap => 1 }
         qw/g1_mana_gauge_empty.png g1_mana_gauge_full.png g1_mana_gauge_overflow.png/
   ],
);

# eg. VGauge->new (gauge => 'food'), default gauge: food
sub new {
   my $class = shift;

   my $self = $class->SUPER::new (
      type  => 'food',
      @_
   );

   $self->{aspect} = $tex{$self->{type}}[0]{w} / $tex{$self->{type}}[0]{h};

   $self
}

sub size_request {
   my ($self) = @_;

   #my $tex = $tex{$self->{type}}[0];
   #@$tex{qw(w h)}
   (0, 0)
}

sub set_max {
   my ($self, $max) = @_;

   return if $self->{max_val} == $max;

   $self->{max_val} = $max;
   $self->update;
}

sub set_value {
   my ($self, $val, $max) = @_;

   $self->set_max ($max)
      if defined $max;

   return if $self->{val} == $val;

   $self->{val} = $val;
   $self->update;
}

sub _draw {
   my ($self) = @_;

   my $tex = $tex{$self->{type}};
   my ($t1, $t2, $t3) = @$tex;

   my ($w, $h) = ($self->{w}, $self->{h});

   if ($self->{vertical}) {
      glRotate 90, 0, 0, 1;
      glTranslate 0, -$self->{w}, 0;

      ($w, $h) = ($h, $w);
   }

   my $ycut = $self->{val} / ($self->{max_val} || 1);

   my $ycut1 = max 0, min 1, $ycut;
   my $ycut2 = max 0, min 1, $ycut - 1;

   my $h1 = $self->{h} * (1 - $ycut1);
   my $h2 = $self->{h} * (1 - $ycut2);

   glEnable GL_BLEND;
   glBlendFunc GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA;
   glEnable GL_TEXTURE_2D;
   glTexEnv GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE;

   glBindTexture GL_TEXTURE_2D, $t1->{name};
   glBegin GL_QUADS;
   glTexCoord 0       , 0;                       glVertex 0 , 0;
   glTexCoord 0       , $t1->{t} * (1 - $ycut1); glVertex 0 , $h1;
   glTexCoord $t1->{s}, $t1->{t} * (1 - $ycut1); glVertex $w, $h1;
   glTexCoord $t1->{s}, 0;                       glVertex $w, 0;
   glEnd;

   my $ycut1 = List::Util::min 1, $ycut;
   glBindTexture GL_TEXTURE_2D, $t2->{name};
   glBegin GL_QUADS;
   glTexCoord 0       , $t2->{t} * (1 - $ycut1); glVertex 0 , $h1;
   glTexCoord 0       , $t2->{t} * (1 - $ycut2); glVertex 0 , $h2;
   glTexCoord $t2->{s}, $t2->{t} * (1 - $ycut2); glVertex $w, $h2;
   glTexCoord $t2->{s}, $t2->{t} * (1 - $ycut1); glVertex $w, $h1;
   glEnd;

   if ($t3) {
      glBindTexture GL_TEXTURE_2D, $t3->{name};
      glBegin GL_QUADS;
      glTexCoord 0       , $t3->{t} * (1 - $ycut2); glVertex 0 , $h2;
      glTexCoord 0       , $t3->{t};                glVertex 0 , $self->{h};
      glTexCoord $t3->{s}, $t3->{t};                glVertex $w, $self->{h};
      glTexCoord $t3->{s}, $t3->{t} * (1 - $ycut2); glVertex $w, $h2;
      glEnd;
   }

   glDisable GL_BLEND;
   glDisable GL_TEXTURE_2D;
}

#############################################################################

package CFClient::UI::Gauge;

our @ISA = CFClient::UI::VBox::;

sub new {
   my ($class, %arg) = @_;

   my $self = $class->SUPER::new (
      tooltip    => $arg{type},
      can_hover  => 1,
      can_events => 1,
      %arg,
   );

   $self->add ($self->{value} = new CFClient::UI::Label valign => +1, align => 0, template => "999");
   $self->add ($self->{gauge} = new CFClient::UI::VGauge type => $self->{type}, expand => 1, can_hover => 1);
   $self->add ($self->{max}   = new CFClient::UI::Label valign => -1, align => 0, template => "999");

   $self
}

sub set_fontsize {
   my ($self, $fsize) = @_;

   $self->{value}->set_fontsize ($fsize);
   $self->{max}  ->set_fontsize ($fsize);
}

sub set_max {
   my ($self, $max) = @_;

   $self->{gauge}->set_max ($max);
   $self->{max}->set_text ($max);
}

sub set_value {
   my ($self, $val, $max) = @_;

   $self->set_max ($max)
      if defined $max;

   $self->{gauge}->set_value ($val, $max);
   $self->{value}->set_text ($val);
}

#############################################################################

package CFClient::UI::Slider;

use strict;

use CFClient::OpenGL;

our @ISA = CFClient::UI::DrawBG::;

my @tex =
      map { new_from_file CFClient::Texture CFClient::find_rcfile $_ }
         qw(s1_slider.png s1_slider_bg.png);

sub new {
   my $class = shift;

   # range [value, low, high, page, unit]

   # TODO: 0-width page
   # TODO: req_w/h are wrong with vertical
   # TODO: calculations are off
   my $self = $class->SUPER::new (
      fg        => [1, 1, 1],
      active_fg => [0, 0, 0],
      bg        => [0, 0, 0, 0.2],
      active_bg => [1, 1, 1, 0.5],
      range     => [0, 0, 100, 10, 0],
      min_w     => $::WIDTH / 80,
      min_h     => $::WIDTH / 80,
      vertical  => 0,
      can_hover => 1,
      inner_pad => 0.02,
      @_
   );

   $self->set_value ($self->{range}[0]);
   $self->update;

   $self
}

sub changed { }

sub set_range {
   my ($self, $range) = @_;

   ($range, $self->{range}) = ($self->{range}, $range);

   $self->update
      if "@$range" ne "@{$self->{range}}";
}

sub set_value {
   my ($self, $value) = @_;

   my ($old_value, $lo, $hi, $page, $unit) = @{$self->{range}};

   $hi = $lo + 1 if $hi <= $lo;

   $page = $hi - $lo if $page > $hi - $lo;

   $value = $lo         if $value < $lo;
   $value = $hi - $page if $value > $hi - $page;

   $value = $lo + $unit * int +($value - $lo + $unit * 0.5) / $unit
      if $unit;

   @{$self->{range}} = ($value, $lo, $hi, $page, $unit);

   if ($value != $old_value) {
      $self->_emit (changed => $value);
      $self->update;
   }
}

sub size_request {
   my ($self) = @_;

   ($self->{req_w}, $self->{req_h})
}

sub button_down {
   my ($self, $ev, $x, $y) = @_;

   $self->SUPER::button_down ($ev, $x, $y);

   $self->{click} = [$self->{range}[0], $self->{vertical} ? $y : $x];
   
   $self->mouse_motion ($ev, $x, $y)
}

sub mouse_motion {
   my ($self, $ev, $x, $y) = @_;

   if ($GRAB == $self) {
      my ($x, $w) = $self->{vertical} ? ($y, $self->{h}) : ($x, $self->{w});

      my (undef, $lo, $hi, $page) = @{$self->{range}};

      $x = ($x - $self->{click}[1]) / ($w * $self->{scale});

      $self->set_value ($self->{click}[0] + $x * ($hi - $page - $lo));
   } else {
      return 0;
   }

   1
}

sub update {
   my ($self) = @_;

   delete $self->{knob_w};
   $self->SUPER::update;
}

sub _draw {
   my ($self) = @_;

   unless ($self->{knob_w}) {
      $self->set_value ($self->{range}[0]);

      my ($value, $lo, $hi, $page) = @{$self->{range}};
      my $range = ($hi - $page - $lo) || 1e-100;

      my $knob_w = List::Util::min 1, $page / ($hi - $lo) || 0.1;

      $self->{offset} = List::Util::max $self->{inner_pad}, $knob_w * 0.5;
      $self->{scale} = 1 - 2 * $self->{offset} || 1e-100;

      $value = ($value - $lo) / $range;
      $value = $value * $self->{scale} + $self->{offset};

      $self->{knob_x} = $value - $knob_w * 0.5;
      $self->{knob_w} = $knob_w;
   }

   $self->SUPER::_draw ();

   glScale $self->{w}, $self->{h};

   if ($self->{vertical}) {
      # draw a vertical slider like a rotated horizontal slider
 
      glTranslate 1, 0, 0;
      glRotate 90, 0, 0, 1;
   }

   my $fg = $FOCUS == $self ? $self->{active_fg} : $self->{fg};
   my $bg = $FOCUS == $self ? $self->{active_bg} : $self->{bg};

   glEnable GL_TEXTURE_2D;
   glTexEnv GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE;

   # draw background
   $tex[1]->draw_quad_alpha (0, 0, 1, 1);

   # draw handle
   $tex[0]->draw_quad_alpha ($self->{knob_x}, 0, $self->{knob_w}, 1);

   glDisable GL_TEXTURE_2D;
}

#############################################################################

package CFClient::UI::ValSlider;

our @ISA = CFClient::UI::HBox::;

sub new {
   my ($class, %arg) = @_;

   my $range = delete $arg{range};

   my $self = $class->SUPER::new (
      slider     => (new CFClient::UI::Slider expand => 1, range => $range),
      entry      => (new CFClient::UI::Label text => "", template => delete $arg{template}),
      to_value   => sub { shift },
      from_value => sub { shift },
      %arg,
   );

   $self->{slider}->connect (changed => sub {
      my ($self, $value) = @_;
      $self->{parent}{entry}->set_text ($self->{parent}{to_value}->($value));
      $self->{parent}->emit (changed => $value);
   });

#   $self->{entry}->connect (changed => sub {
#      my ($self, $value) = @_;
#      $self->{parent}{slider}->set_value ($self->{parent}{from_value}->($value));
#      $self->{parent}->emit (changed => $value);
#   });

   $self->add ($self->{slider}, $self->{entry});

   $self->{slider}->emit (changed => $self->{slider}{range}[0]);

   $self
}

sub set_range { shift->{slider}->set_range (@_) }
sub set_value { shift->{slider}->set_value (@_) }

#############################################################################

package CFClient::UI::TextView;

our @ISA = CFClient::UI::HBox::;

use CFClient::OpenGL;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (
      fontsize   => 1,
      can_events => 0,
      #font      => default_font
      @_,
                 
      layout     => (new CFClient::Layout 1),
      par        => [],
      height     => 0,
      children   => [
         (new CFClient::UI::Empty expand => 1),
         (new CFClient::UI::Slider vertical => 1),
      ],
   );

   $self->{children}[1]->connect (changed => sub { $self->update });

   $self
}

sub set_fontsize {
   my ($self, $fontsize) = @_;

   $self->{fontsize} = $fontsize;
   $self->reflow;
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   $self->SUPER::size_allocate ($w, $h);

   $self->{layout}->set_font ($self->{font}) if $self->{font};
   $self->{layout}->set_height ($self->{fontsize} * $::FONTSIZE);
   $self->{layout}->set_width ($self->{children}[0]{w});

   $self->reflow;
}

sub text_size {
   my ($self, $text, $indent) = @_;

   my $layout = $self->{layout};

   $layout->set_height ($self->{fontsize} * $::FONTSIZE);
   $layout->set_width ($self->{children}[0]{w} - $indent);
   $layout->set_markup ($text);
   
   $layout->size
}

sub reflow {
   my ($self) = @_;

   $self->{need_reflow}++;
   $self->update;
}

sub set_offset {
   my ($self, $offset) = @_;

   # todo: base offset on lines or so, not on pixels
   $self->{children}[1]->set_value ($offset);
}

sub clear {
   my ($self) = @_;

   $self->{par} = [];
   $self->{height} = 0;
   $self->{children}[1]->set_range ([0, 0, 0, 1, 1]);
}

sub add_paragraph {
   my ($self, $color, $text, $indent) = @_;

   for my $line (split /\n/, $text) {
      my ($w, $h) = $self->text_size ($line);
      $self->{height} += $h;
      push @{$self->{par}}, [$w + $indent, $h, $color, $indent, $line];
   }

   $self->{children}[1]->set_range ([$self->{height}, 0, $self->{height}, $self->{h}, 1]);
}

sub update {
   my ($self) = @_;

   $self->SUPER::update;

   return unless $self->{h} > 0;

   delete $self->{texture};

   $ROOT->on_post_alloc ($self, sub {
      my ($W, $H) = @{$self->{children}[0]}{qw(w h)};

      if (delete $self->{need_reflow}) {
         my $height = 0;

         my $layout = $self->{layout};

         $layout->set_height ($self->{fontsize} * $::FONTSIZE);

         for (@{$self->{par}}) {
            if (1 || $_->[0] >= $W) { # TODO: works,but needs reconfigure etc. support
               $layout->set_width ($W - $_->[3]);
               $layout->set_markup ($_->[4]);
               my ($w, $h) = $layout->size;
               $_->[0] = $w + $_->[3];
               $_->[1] = $h;
            }

            $height += $_->[1];
         }

         $self->{height} = $height;

         $self->{children}[1]->set_range ([$height, 0, $height, $H, 1]);
         
         delete $self->{texture};
      }

      $self->{texture} ||= new_from_opengl CFClient::Texture $W, $H, sub {
         glClearColor 0.5, 0.5, 0.5, 0;
         glClear GL_COLOR_BUFFER_BIT;

         my $top = int $self->{children}[1]{range}[0];

         my $y0 = $top;
         my $y1 = $top + $H;

         my $y = 0;

         my $layout = $self->{layout};

         $layout->set_font ($self->{font}) if $self->{font};

         glEnable GL_BLEND;
         #TODO# not correct in windows where rgba is forced off
         glBlendFunc GL_ONE, GL_ONE_MINUS_SRC_ALPHA;

         for my $par (@{$self->{par}}) {
            my $h = $par->[1];

            if ($y0 < $y + $h && $y < $y1) {
               $layout->set_foreground (@{ $par->[2] });
               $layout->set_width ($W - $par->[3]);
               $layout->set_markup ($par->[4]);

               my ($w, $h, $data, $format, $internalformat) = $layout->render;

               glRasterPos $par->[3], $y - $y0;
               glDrawPixels $w, $h, $format, GL_UNSIGNED_BYTE, $data;
            }

            $y += $h;
         }

         glDisable GL_BLEND;
      };
   });
}

sub _draw {
   my ($self) = @_;

   glEnable GL_TEXTURE_2D;
   glTexEnv GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE;
   glColor 1, 1, 1, 1;
   $self->{texture}->draw_quad_alpha (0, 0, $self->{children}[0]{w}, $self->{children}[0]{h});
   glDisable GL_TEXTURE_2D;

   $self->{children}[1]->draw;

}

#############################################################################

package CFClient::UI::Animator;

use CFClient::OpenGL;

our @ISA = CFClient::UI::Bin::;

sub moveto {
   my ($self, $x, $y) = @_;

   $self->{moveto} = [$self->{x}, $self->{y}, $x, $y];
   $self->{speed}  = 0.001;
   $self->{time}   = 1;
   
   ::animation_start $self;
}

sub animate {
   my ($self, $interval) = @_;

   $self->{time} -= $interval * $self->{speed};
   if ($self->{time} <= 0) {
      $self->{time} = 0;
      ::animation_stop $self;
   }

   my ($x0, $y0, $x1, $y1) = @{$self->{moveto}};
      
   $self->{x} = $x0 * $self->{time} + $x1 * (1 - $self->{time});
   $self->{y} = $y0 * $self->{time} + $y1 * (1 - $self->{time});
}

sub _draw {
   my ($self) = @_;

   glPushMatrix;
   glRotate $self->{time} * 1000, 0, 1, 0;
   $self->{children}[0]->draw;
   glPopMatrix;
}

#############################################################################

package CFClient::UI::Flopper;

our @ISA = CFClient::UI::Button::;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (
      state       => 0,
      on_activate => \&toggle_flopper,
      @_
   );

   $self
}

sub toggle_flopper {
   my ($self) = @_;

   $self->{other}->toggle_visibility;
}

#############################################################################

package CFClient::UI::Tooltip;

our @ISA = CFClient::UI::Bin::;

use CFClient::OpenGL;

sub new {
   my $class = shift;

   $class->SUPER::new (
      @_,
      can_events => 0,
   )
}

sub set_tooltip_from {
   my ($self, $widget) = @_;

   my $tooltip = $widget->{tooltip};

   if ($ENV{CFPLUS_DEBUG} & 2) {
      $tooltip .= "\n\n" . (ref $widget) . "\n"
                . "$widget->{x} $widget->{y} $widget->{w} $widget->{h}\n"
                . "req $widget->{req_w} $widget->{req_h}\n"
                . "visible $widget->{visible}";
   }

   $self->add (new CFClient::UI::Label
      markup    => $tooltip,
      max_w     => ($widget->{tooltip_width} || 0.25) * $::WIDTH,
      fontsize  => 0.8,
      fg        => [0, 0, 0, 1],
      ellipsise => 0,
      font      => ($widget->{tooltip_font} || $::FONT_PROP),
   );
}

sub size_request {
   my ($self) = @_;

   my ($w, $h) = @{$self->child}{qw(req_w req_h)};

   ($w + 4, $h + 4)
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   $self->SUPER::size_allocate ($w - 4, $h - 4);
}

sub visibility_change {
   my ($self, $visible) = @_;

   return unless $visible;

   $self->{root}->on_post_alloc ("move_$self" => sub {
      my $widget = $self->{owner}
         or return;

      my ($x, $y) = $widget->coord2global ($widget->{w}, 0);

      ($x, $y) = $widget->coord2global (-$self->{w}, 0)
         if $x + $self->{w} > $::WIDTH;

      $self->move_abs ($x, $y);
   });
}

sub _draw {
   my ($self) = @_;

   glTranslate 0.375, 0.375;

   my ($w, $h) = @$self{qw(w h)};

   glColor 1, 0.8, 0.4;
   glBegin GL_QUADS;
   glVertex 0 , 0;
   glVertex 0 , $h;
   glVertex $w, $h;
   glVertex $w, 0;
   glEnd;
   
   glColor 0, 0, 0;
   glBegin GL_LINE_LOOP;
   glVertex 0 , 0;
   glVertex 0 , $h;
   glVertex $w, $h;
   glVertex $w, 0;
   glEnd;
   
   glTranslate 2 - 0.375, 2 - 0.375;

   $self->SUPER::_draw;
}

#############################################################################

package CFClient::UI::Face;

our @ISA = CFClient::UI::Base::;

use CFClient::OpenGL;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (
      aspect     => 1,
      can_events => 0,
      @_,
   );

   if ($self->{anim} && $self->{animspeed}) {
      Scalar::Util::weaken (my $widget = $self);

      $self->{timer} = Event->timer (
         at       => $self->{animspeed} * int $::NOW / $self->{animspeed},
         hard     => 1,
         interval => $self->{animspeed},
         cb       => sub {
            ++$widget->{frame};
            $widget->update;
         },
      );
   }
   
   $self
}

sub size_request {
   (32, 8)
}

sub update {
   my ($self) = @_;

   return unless $self->{visible};

   $self->SUPER::update;
}

sub _draw {
   my ($self) = @_;

   return unless $::CONN;

   my $face;

   if ($self->{frame}) {
      my $anim = $::CONN->{anim}[$self->{anim}];

      $face = $anim->[ $self->{frame} % @$anim ]
         if $anim && @$anim;
   }
   
   my $tex = $::CONN->{texture}[$::CONN->{faceid}[$face || $self->{face}]];

   if ($tex) {
      glEnable GL_TEXTURE_2D;
      glTexEnv GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE;
      glColor 1, 1, 1, 1;
      $tex->draw_quad_alpha (0, 0, $self->{w}, $self->{h});
      glDisable GL_TEXTURE_2D;
   }
}

sub DESTROY {
   my ($self) = @_;

   $self->{timer}->cancel
      if $self->{timer};

   $self->SUPER::DESTROY;
}

#############################################################################

package CFClient::UI::Buttonbar;

our @ISA = CFClient::UI::HBox::;

# TODO: should actualyl wrap buttons and other goodies.

#############################################################################

package CFClient::UI::Menu;

our @ISA = CFClient::UI::FancyFrame::;

use CFClient::OpenGL;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (
      items => [],
      z     => 100,
      @_,
   );

   $self->add ($self->{vbox} = new CFClient::UI::VBox);

   for my $item (@{ $self->{items} }) {
      my ($widget, $cb) = @$item;

      # handle various types of items, only text for now
      if (!ref $widget) {
         $widget = new CFClient::UI::Label
            can_hover  => 1,
            can_events => 1,
            text       => $widget;
      }

      $self->{item}{$widget} = $item;

      $self->{vbox}->add ($widget);
   }

   $self
}

# popup given the event (must be a mouse button down event currently)
sub popup {
   my ($self, $ev) = @_;

   $self->_emit ("popdown");

   # maybe save $GRAB? must be careful about events...
   $GRAB = $self;
   $self->{button} = $ev->{button};

   $self->show;
   $self->move_abs ($ev->{x} - $self->{w} * 0.5, $ev->{y} - $self->{h} * 0.5);
}

sub mouse_motion {
   my ($self, $ev, $x, $y) = @_;

   # TODO: should use vbox->find_widget or so
   $HOVER = $ROOT->find_widget ($ev->{x}, $ev->{y});
   $self->{hover} = $self->{item}{$HOVER};

   0
}

sub button_up {
   my ($self, $ev, $x, $y) = @_;

   if ($ev->{button} == $self->{button}) {
      undef $GRAB;
      $self->hide;

      $self->_emit ("popdown");
      $self->{hover}[1]->() if $self->{hover};
   } else {
      return 0
   }

   1
}

#############################################################################

package CFClient::UI::Multiplexer;

our @ISA = CFClient::UI::Container::;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (
      @_,
   );

   $self->{current} = $self->{children}[0]
      if @{ $self->{children} };

   $self
}

sub add {
   my ($self, @widgets) = @_;

   $self->SUPER::add (@widgets);

   $self->{current} = $self->{children}[0]
      if @{ $self->{children} };
}

sub set_current_page {
   my ($self, $page_or_widget) = @_;

   my $widget = ref $page_or_widget
                   ? $page_or_widget
                   : $self->{children}[$page_or_widget];

   $self->{current} = $widget;
   $self->{current}->configure (0, 0, $self->{w}, $self->{h});

   $self->_emit (page_changed => $self->{current});

   $self->realloc;
}

sub visible_children {
   $_[0]{current}
}

sub size_request {
   my ($self) = @_;

   $self->{current}->size_request
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   $self->{current}->configure (0, 0, $w, $h);
}

sub _draw {
   my ($self) = @_;

   $self->{current}->draw;
}

#############################################################################

package CFClient::UI::Notebook;

our @ISA = CFClient::UI::VBox::;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (
      buttonbar   => (new CFClient::UI::Buttonbar),
      multiplexer => (new CFClient::UI::Multiplexer expand => 1),
      # filter => # will be put between multiplexer and $self
      @_,
   );
   
   $self->{filter}->add ($self->{multiplexer}) if $self->{filter};
   $self->SUPER::add ($self->{buttonbar}, $self->{filter} || $self->{multiplexer});

   $self
}

sub add {
   my ($self, $title, $widget, $tooltip) = @_;

   Scalar::Util::weaken $self;

   $self->{buttonbar}->add (new CFClient::UI::Button
      markup      => $title,
      tooltip     => $tooltip,
      on_activate => sub { $self->set_current_page ($widget) },
   );

   $self->{multiplexer}->add ($widget);
}

sub set_current_page {
   my ($self, $page) = @_;

   $self->{multiplexer}->set_current_page ($page);
   $self->_emit (page_changed => $self->{multiplexer}{current});
}

#############################################################################

package CFClient::UI::Statusbox;

our @ISA = CFClient::UI::VBox::;

sub new {
   my $class = shift;

   $class->SUPER::new (
      fontsize => 0.8,
      @_,
   )
}

sub reorder {
   my ($self) = @_;
   my $NOW = time;

   while (my ($k, $v) = each %{ $self->{item} }) {
      delete $self->{item}{$k} if $v->{timeout} < $NOW;
   }

   my @widgets;

   my @items = sort {
                  $a->{pri} <=> $b->{pri}
                     or $b->{id} <=> $a->{id}
               } values %{ $self->{item} };

   my $count = 10 + 1;
   for my $item (@items) {
      last unless --$count;

      push @widgets, $item->{label} ||= do {
         # TODO: doesn't handle markup well (read as: at all)
         my $short = $item->{count} > 1
                     ? "<b>$item->{count} ×</b> $item->{text}"
                     : $item->{text};

         for ($short) {
            s/^\s+//;
            s/\s+/ /g;
         }

         new CFClient::UI::Label
            markup        => $short,
            tooltip       => $item->{tooltip},
            tooltip_font  => $::FONT_PROP,
            tooltip_width => 0.67,
            fontsize      => $item->{fontsize} || $self->{fontsize},
            max_w         => $::WIDTH * 0.44,
            fg            => $item->{fg},
            can_events    => 1,
            can_hover     => 1
      };
   }

   $self->clear;
   $self->SUPER::add (reverse @widgets);
}

sub add {
   my ($self, $text, %arg) = @_;

   $text =~ s/^\s+//;
   $text =~ s/\s+$//;

   return unless $text;

   my $timeout = time + ((delete $arg{timeout}) || 60);

   my $group = exists $arg{group} ? $arg{group} : ++$self->{id};

   if (my $item = $self->{item}{$group}) {
      if ($item->{text} eq $text) {
         $item->{count}++;
      } else {
         $item->{count} = 1;
         $item->{text} = $item->{tooltip} = $text;
      }
      $item->{id} = ++$self->{id};
      $item->{timeout} = $timeout;
      delete $item->{label};
   } else {
      $self->{item}{$group} = {
         id       => ++$self->{id},
         text     => $text,
         timeout  => $timeout,
         tooltip  => $text,
         fg       => [0.8, 0.8, 0.8, 0.8],
         pri      => 0,
         count    => 1,
         %arg,
      };
   }

   $self->reorder;
}

sub reconfigure {
   my ($self) = @_;

   delete $_->{label}
      for values %{ $self->{item} || {} };

   $self->reorder;
   $self->SUPER::reconfigure;
}

#############################################################################

package CFClient::UI::Inventory;

our @ISA = CFClient::UI::ScrolledWindow::;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (
      child => (new CFClient::UI::Table col_expand => [0, 1, 0]),
      @_,
   );

   $self
}

sub set_items {
   my ($self, $items) = @_;

   $self->{child}->clear;
   return unless $items;

   my @items = sort {
      ($a->{type} <=> $b->{type})
         or ($a->{name} cmp $b->{name})
   } @$items;

   $self->{real_items} = \@items;

   my $row = 0;
   for my $item (@items) {
      CFClient::Item::update_widgets $item;

      $self->{child}->add (0, $row, $item->{face_widget});
      $self->{child}->add (1, $row, $item->{desc_widget});
      $self->{child}->add (2, $row, $item->{weight_widget});

      $row++;
   }
}

#############################################################################

package CFClient::UI::BindEditor;

our @ISA = CFClient::UI::FancyFrame::;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (binding => [], commands => [], @_);

   $self->add (my $vb = new CFClient::UI::VBox);


   $vb->add ($self->{rec_btn} = new CFClient::UI::Button
      text => "start recording",
      tooltip => "Start/Stops recording of actions."
                ."All subsequent actions after the recording started will be captured."
                ."The actions are displayed after the record was stopped."
                ."To bind the action you have to click on the 'Bind' button",
      on_activate => sub {
         unless ($self->{recording}) {
            $self->start;
         } else {
            $self->stop;
         }
      });

   $vb->add (new CFClient::UI::Label text => "Actions:");
   $vb->add ($self->{cmdbox} = new CFClient::UI::VBox);

   $vb->add (new CFClient::UI::Label text => "Bound to: ");
   $vb->add (my $hb = new CFClient::UI::HBox);
   $hb->add ($self->{keylbl} = new CFClient::UI::Label expand => 1);
   $hb->add (new CFClient::UI::Button
      text => "bind",
      tooltip => "This opens a query where you have to press the key combination to bind the recorded actions",
      on_activate => sub {
         $self->ask_for_bind;
      });

   $vb->add (my $hb = new CFClient::UI::HBox);
   $hb->add (new CFClient::UI::Button
      text => "ok",
      expand => 1,
      tooltip => "This closes the binding editor and saves the binding",
      on_activate => sub {
         $self->hide;
         $self->commit;
      });

   $hb->add (new CFClient::UI::Button
      text => "cancel",
      expand => 1,
      tooltip => "This closes the binding editor without saving",
      on_activate => sub {
         $self->hide;
         $self->{binding_cancel}->()
            if $self->{binding_cancel};
      });

   $self->update_binding_widgets;

   $self
}

sub commit {
   my ($self) = @_;
   my ($mod, $sym, $cmds) = $self->get_binding;
   if ($sym != 0 && @$cmds > 0) {
      $::STATUSBOX->add ("Bound actions to '".CFClient::Binder::keycombo_to_name ($mod, $sym)
                        ."'. Don't forget 'Save Config'!");
      $self->{binding_change}->($mod, $sym, $cmds)
         if $self->{binding_change};
   } else {
      $::STATUSBOX->add ("No action bound, no key or action specified!");
      $self->{binding_cancel}->()
         if $self->{binding_cancel};
   }
}

sub start {
   my ($self) = @_;

   $self->{rec_btn}->set_text ("stop recording");
   $self->{recording} = 1;
   $self->clear_command_list;
   $::CONN->start_record if $::CONN;
}

sub stop {
   my ($self) = @_;

   $self->{rec_btn}->set_text ("start recording");
   $self->{recording} = 0;

   my $rec;
   $rec = $::CONN->stop_record if $::CONN;
   return unless ref $rec eq 'ARRAY';
   $self->set_command_list ($rec);
}


sub ask_for_bind_and_commit {
   my ($self) = @_;
   $self->ask_for_bind (1);
}

sub ask_for_bind {
   my ($self, $commit) = @_;

   CFClient::Binder::open_binding_dialog (sub {
      my ($mod, $sym) = @_;
      $self->{binding} = [$mod, $sym];  # XXX: how to stop that memleak?
      $self->update_binding_widgets;
      $self->commit if $commit;
   });
}

# $mod and $sym are the modifiers and key symbol
# $cmds is a array ref of strings (the commands)
# $cb is the callback that is executed on OK
# $ccb is the callback that is executed on CANCEL and 
# when the binding was unsuccessful on OK
sub set_binding {
   my ($self, $mod, $sym, $cmds, $cb, $ccb) = @_;

   $self->clear_command_list;
   $self->{recording} = 0;
   $self->{rec_btn}->set_text ("start recording");

   $self->{binding} = [$mod, $sym];
   $self->{commands} = $cmds;

   $self->{binding_change} = $cb;
   $self->{binding_cancel} = $ccb;

   $self->update_binding_widgets;
}

# this is a shortcut method that asks for a binding
# and then just binds it.
sub do_quick_binding {
   my ($self, $cmds) = @_;
   $self->set_binding (undef, undef, $cmds, sub {
      $::CFG->{bindings}->{$_[0]}->{$_[1]} = $_[2];
   });
   $self->ask_for_bind (1);
}

sub update_binding_widgets {
   my ($self) = @_;
   my ($mod, $sym, $cmds) = $self->get_binding;
   $self->{keylbl}->set_text (CFClient::Binder::keycombo_to_name ($mod, $sym));
   $self->set_command_list ($cmds);
}

sub get_binding {
   my ($self) = @_;
   return (
      $self->{binding}->[0],
      $self->{binding}->[1],
      [ grep { defined $_ } @{$self->{commands}} ]
   );
}

sub clear_command_list {
   my ($self) = @_;
   $self->{cmdbox}->clear ();
}

sub set_command_list {
   my ($self, $cmds) = @_;

   $self->{cmdbox}->clear ();
   $self->{commands} = $cmds;

   my $idx = 0;

   for (@$cmds) {
      $self->{cmdbox}->add (my $hb = new CFClient::UI::HBox);

      my $i = $idx;
      $hb->add (new CFClient::UI::Label text => $_);
      $hb->add (new CFClient::UI::Button
         text => "delete",
         tooltip => "Deletes the action from the record",
         on_activate => sub {
            $self->{cmdbox}->remove ($hb);
            $cmds->[$i] = undef;
         });


      $idx++
   }
}

#############################################################################

package CFClient::UI::SpellList;

our @ISA = CFClient::UI::Table::;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (
      binding  => [],
      commands => [],
      @_,
   )
}

# XXX: Do sorting? Argl...
sub add_spell {
   my ($self, $spell) = @_;
   $self->{spells}->{$spell->{name}} = $spell;

   $self->add (0, $self->{tbl_idx},   new CFClient::UI::Face
      face => $spell->{face},
      can_hover => 1,
      can_events => 1,
      tooltip => $spell->{message});

   $self->add (1, $self->{tbl_idx},   new CFClient::UI::Label
      text => $spell->{name},
      can_hover => 1,
      can_events => 1,
      tooltip => $spell->{message},
      expand => 1);

   $self->add (2, $self->{tbl_idx},   new CFClient::UI::Label
      text => (sprintf "lvl: %2d sp: %2d dmg: %2d",
                 $spell->{level}, ($spell->{mana} || $spell->{grace}), $spell->{damage}),
      expand => 1);

   $self->add (3, $self->{tbl_idx}++, new CFClient::UI::Button
      text => "bind to key",
      on_activate => sub { $::BIND_EDITOR->do_quick_binding (["cast $spell->{name}"]) });
}

sub rebuild_spell_list {
   my ($self) = @_;
   $self->{tbl_idx} = 0;
   $self->add_spell ($_) for values %{$self->{spells}};
}

sub remove_spell {
   my ($self, $spell) = @_;
   delete $self->{spells}->{$spell->{name}};
   $self->rebuild_spell_list;
}

#############################################################################

package CFClient::UI::Root;

our @ISA = CFClient::UI::Container::;

use CFClient::OpenGL;

sub new {
   my $class = shift;

   my $self = $class->SUPER::new (
      visible => 1,
      @_,
   );

   Scalar::Util::weaken ($self->{root} = $self);

   $self
}

sub size_request {
   my ($self) = @_;

   ($self->{w}, $self->{h})
}

sub _to_pixel {
   my ($coord, $size, $max) = @_;

   $coord =
      $coord eq "center" ? ($max - $size) * 0.5
    : $coord eq "max"    ? $max
    :                      $coord;

   $coord = 0            if $coord < 0;
   $coord = $max - $size if $coord > $max - $size;

   int $coord + 0.5
}

sub size_allocate {
   my ($self, $w, $h) = @_;

   for my $child ($self->children) {
      my ($X, $Y, $W, $H) = @$child{qw(x y req_w req_h)};

      $X = $child->{force_x} if exists $child->{force_x};
      $Y = $child->{force_y} if exists $child->{force_y};

      $X = _to_pixel $X, $W, $self->{w};
      $Y = _to_pixel $Y, $H, $self->{h};

      $child->configure ($X, $Y, $W, $H);
   }
}

sub coord2local {
   my ($self, $x, $y) = @_;

   ($x, $y)
}

sub coord2global {
   my ($self, $x, $y) = @_;

   ($x, $y)
}

sub update {
   my ($self) = @_;

   $::WANT_REFRESH++;
}

sub add {
   my ($self, @children) = @_;

   $_->{is_toplevel} = 1
      for @children;

   $self->SUPER::add (@children);
}

sub remove {
   my ($self, @children) = @_;

   $self->SUPER::remove (@children);

   delete $self->{is_toplevel}
      for @children;

   while (@children) {
      my $w = pop @children;
      push @children, $w->children;
      $w->set_invisible;
   }
}

sub on_refresh {
   my ($self, $id, $cb) = @_;

   $self->{refresh_hook}{$id} = $cb;
}

sub on_post_alloc {
   my ($self, $id, $cb) = @_;

   $self->{post_alloc_hook}{$id} = $cb;
}

sub draw {
   my ($self) = @_;

   while ($self->{refresh_hook}) {
      $_->()
         for values %{delete $self->{refresh_hook}};
   }

   if ($self->{realloc}) {
      my %queue;
      my @queue;
      my $widget;

      outer:
      while () {
         if (my $realloc = delete $self->{realloc}) {
            for $widget (values %$realloc) {
               $widget->{visible} or next; # do not resize invisible widgets

               $queue{$widget+0}++ and next; # duplicates are common

               push @{ $queue[$widget->{visible}] }, $widget;
            }
         }

         while () {
            @queue or last outer;

            $widget = pop @{ $queue[-1] || [] }
               and last;
            
            pop @queue;
         }

         delete $queue{$widget+0};

         my ($w, $h) = $widget->size_request;

         $w = List::Util::max $widget->{min_w}, $w + $widget->{padding_x} * 2;
         $h = List::Util::max $widget->{min_h}, $h + $widget->{padding_y} * 2;

         $w = $widget->{force_w} if exists $widget->{force_w};
         $h = $widget->{force_h} if exists $widget->{force_h};

         if ($widget->{req_w} != $w || $widget->{req_h} != $h
             || delete $widget->{force_realloc}) {
            $widget->{req_w} = $w;
            $widget->{req_h} = $h;

            $self->{size_alloc}{$widget+0} = $widget;

            if (my $parent = $widget->{parent}) {
               $self->{realloc}{$parent+0} = $parent
                  unless $queue{$parent+0};

               $parent->{force_size_alloc} = 1;
               $self->{size_alloc}{$parent+0} = $parent;
            }
         }

         delete $self->{realloc}{$widget+0};
       }
   }

   while (my $size_alloc = delete $self->{size_alloc}) {
      my @queue = sort { $b->{visible} <=> $a->{visible} }
                       values %$size_alloc;

      while () {
         my $widget = pop @queue || last;

         my ($w, $h) = @$widget{qw(alloc_w alloc_h)};

         $w = 0 if $w < 0;
         $h = 0 if $h < 0;

         $w = int $w + 0.5;
         $h = int $h + 0.5;

         if ($widget->{w} != $w || $widget->{h} != $h || delete $widget->{force_size_alloc}) {
            $widget->{old_w} = $widget->{w};
            $widget->{old_h} = $widget->{h};

            $widget->{w} = $w;
            $widget->{h} = $h;

            $widget->emit (size_allocate => $w, $h);
         }
      }
   }

   while ($self->{post_alloc_hook}) {
      $_->()
         for values %{delete $self->{post_alloc_hook}};
   }


   glViewport 0, 0, $::WIDTH, $::HEIGHT;
   glClearColor +($::CFG->{fow_intensity}) x 3, 1;
   glClear GL_COLOR_BUFFER_BIT;

   glMatrixMode GL_PROJECTION;
   glLoadIdentity;
   glOrtho 0, $::WIDTH, $::HEIGHT, 0, -10000, 10000;
   glMatrixMode GL_MODELVIEW;
   glLoadIdentity;

   {
      package CFClient::UI::Base;

      ($draw_x, $draw_y, $draw_w, $draw_h) =
         (0, 0, $self->{w}, $self->{h});
   }

   $self->_draw;
}

#############################################################################

package CFClient::UI;

$ROOT = new CFClient::UI::Root;
$TOOLTIP = new CFClient::UI::Tooltip z => 900;

1