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/* text.cc |
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* This file is part of NDK++ library |
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* Copyright (c) 2003,2004 by Stanislav Ievlev |
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* |
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* This file is covered by the GNU Library General Public License, |
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* which should be included with libndk as the file COPYING. |
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*/ |
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#include <ndk/color.hh> |
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#include <ndk/packer.hh> |
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#include <ndk/palette.hh> |
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#include <ndk/text.hh> |
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|
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#include <ndk/pen.hh> |
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|
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using ndk::text; |
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|
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text::text (std::string const &title, ndk::panel *parent, wrap_type wrapping) |
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: ndk::frame (title, parent) |
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, x_ (0) |
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, y_ (0) |
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, wrapping_ (wrapping) |
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{ |
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pen pen (pad_); |
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|
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pen.fill (palette::instance ().find (colors::label)->second); |
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|
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events ()->on_keyboard (slot (&text::at_keyboard, this)); |
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} |
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|
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void |
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text::add_text (color c, std::string const &str) |
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{ |
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bool at_bottom = y_ + height () >= pad_.height (); |
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|
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/* calculate new height */ |
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pad_.resize ( wrapping_ == wrap |
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? width () - 2 |
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: std::max (pad_.width (), string_width (str) + 1) |
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, std::max (height (), pen (pad_).y () + string_height (str)) |
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); |
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ndk::pen pen (pad_); |
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pen.set_color (c); |
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pen.write (str); /* add next text to the pad */ |
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|
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if (at_bottom) |
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while (down ()) |
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; |
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} |
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|
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void |
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text::draw () /**< draw frame on the panel */ |
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{ |
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frame::draw (); |
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pad_.draw (*this, x_, y_); /* draw pad content in the viewport */ |
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} |
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|
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bool |
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text::right () |
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{ |
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if (x_ + width () < pad_.width () - 1) |
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{ |
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++x_; |
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draw (); |
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return true; |
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} |
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return false; |
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} |
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|
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bool |
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text::left () |
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{ |
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if (x_ > 0) |
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{ |
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--x_; |
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draw (); |
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return true; |
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} |
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return false; |
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} |
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|
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bool |
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text::down () |
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{ |
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if (y_ + height () < pad_.height ()) |
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{ |
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++y_; |
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draw (); |
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return true; |
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} |
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return false; |
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} |
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|
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bool |
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text::up () |
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{ |
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if (y_ > 0) |
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{ |
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--y_; |
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draw (); |
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return true; |
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} |
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return false; |
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} |
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|
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ndk::event::result |
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text::at_keyboard (keyboard const &ev) |
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{ |
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switch (ev.code ()) |
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{ |
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case key::right: |
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case key::l: |
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right (); |
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break; |
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case key::left: |
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case key::h: |
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left (); |
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break; |
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case key::up: |
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case key::k: |
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up (); |
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break; |
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case key::down: |
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case key::j: |
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down (); |
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break; |
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default: |
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return event::ignored; |
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} |
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|
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pen (*this).commit (); |
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emit (changed); |
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|
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return event::accepted; |
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} |
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|
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int |
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text::string_height (std::string const &str) /**< @return number of strings */ |
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{ |
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int count = 0; |
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|
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if (wrapping_ == wrap) |
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/* in wrap mode we need additional recalculations of the string height */ |
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count = str.length () / width () + (str.length () % width () != 0 ? 1 : 0); |
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else |
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/* not wrap mode: only calculate number of '\n' */ |
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count = std::count (str.begin (), str.end (), '\n'); |
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|
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/* we also need an additional space below if line have '\n' at the end */ |
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if (*(str.end () - 1) == '\n') |
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++count; /* grow width if nesessary */ |
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return count; |
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} |
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|
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int |
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text::string_width (std::string const &str) /**< @return maximum string length */ |
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{ |
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std::string::const_iterator beg = str.begin (); |
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std::string::const_iterator end = str.end (); |
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ptrdiff_t max_len = 0; |
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bool need_fix = true; |
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|
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do |
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{ |
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std::string::const_iterator curr (std::find (beg, str.end (), '\n')); |
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max_len = std::max (max_len, |
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std::distance (beg, curr) + ((need_fix) ? pen (pad_).x () : 0)); |
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beg = (curr == end) ? curr : (curr + 1); |
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need_fix = false; |
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} |
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while (beg != end); |
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|
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return max_len; |
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} |
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|
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void |
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text::resize (int w, int h) |
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{ |
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frame::resize (w, h); |
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/* grow size of the text if we need it */ |
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pad_.resize (std::max (pad_.width (), w + 1), std::max (pad_.height (), h)); |
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} |
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|
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void |
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text::clear () |
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{ |
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pen (pad_).clear (); |
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x_ = 0; |
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y_ = 0; |
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/* truncate buffer to viewport size */ |
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pad_.resize (this->width (), this->height ()); |
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draw (); |
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} |
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|
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void |
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text::set_text (color c, std::string const &str) |
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{ |
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clear (); |
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add_text (c, str); |
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draw (); |
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} |
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|
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int |
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text::length () const |
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{ |
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return pad_.height (); |
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} |
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|
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int |
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text::last_line () const |
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{ |
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return y_ + height (); |
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} |
