cppconsui/ColorPickerPalette.cpp

   1 // Copyright (C) 2012 Mark Pustjens <pustjens@dds.nl>
   2 // Copyright (C) 2012-2015 Petr Pavlu <setup@dagobah.cz>
   3 //
   4 // This file is part of CenterIM.
   5 //
   6 // CenterIM is free software; you can redistribute it and/or modify
   7 // it under the terms of the GNU General Public License as published by
   8 // the Free Software Foundation; either version 2 of the License, or
   9 // (at your option) any later version.
  10 //
  11 // CenterIM is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15 //
  16 // You should have received a copy of the GNU General Public License
  17 // along with CenterIM.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 /// @file
  20 /// ColorPickerPalette class implementation.
  21 ///
  22 /// @ingroup cppconsui
  23
  24 #include "ColorPickerPalette.h"
  25
  26 #include "ColorScheme.h"
  27
  28 #include <algorithm>
  29
  30 #define GRAYSCALE_START 232
  31 #define GRAYSCALE_END 255
  32
  33 namespace CppConsUI {
  34
  35 ColorPickerPalette::ColorPickerPalette(int default_color, int flags)
  36   : Container(0, 0)
  37 {
  38   if (flags == (FLAG_HIDE_ANSI | FLAG_HIDE_GRAYSCALE | FLAG_HIDE_COLORCUBE)) {
  39     // Show at least ANSI colors.
  40     flags = FLAG_HIDE_GRAYSCALE | FLAG_HIDE_COLORCUBE;
  41   }
  42
  43   if (Curses::getColorCount() < 256)
  44     flags |= (FLAG_HIDE_GRAYSCALE | FLAG_HIDE_COLORCUBE);
  45
  46   if (!(flags & FLAG_HIDE_ANSI)) {
  47     // Default 16 colors.
  48     addAnsi(default_color);
  49   }
  50
  51   if (!(flags & FLAG_HIDE_GRAYSCALE)) {
  52     // Grayscale ladder.
  53     addGrayscale(default_color);
  54   }
  55
  56   if (!(flags & FLAG_HIDE_COLORCUBE)) {
  57     // 6x6x6 color cube.
  58     addColorCube(default_color);
  59   }
  60 }
  61
  62 void ColorPickerPalette::onSelectColor(Button &activator)
  63 {
  64   ColorPickerPaletteButton *button =
  65     dynamic_cast<ColorPickerPaletteButton *>(&activator);
  66   assert(button != nullptr);
  67
  68   signal_color_selected(*this, button->getColor());
  69 }
  70
  71 void ColorPickerPalette::addButton(int x, int y, int color, int default_color)
  72 {
  73   auto button = new ColorPickerPaletteButton(color);
  74   button->signal_activate.connect(
  75     sigc::mem_fun(this, &ColorPickerPalette::onSelectColor));
  76   addWidget(*button, x, y);
  77
  78   if (color == default_color)
  79     button->grabFocus();
  80 }
  81
  82 void ColorPickerPalette::addAnsi(int default_color)
  83 {
  84   int w, h, x, y;
  85
  86   // Resize the ColorPickerPalette.
  87   w = getWidth();
  88   h = y = getHeight();
  89
  90   // There are 8 ANSI colors, or 16 when bright colors are supported.
  91   w = std::max(w, Curses::NUM_DEFAULT_COLORS);
  92   h += 2;
  93
  94   resize(w, h);
  95
  96   // Add the color picker buttons, in two lines.
  97   // @todo Support terms with only 8 colors.
  98   int half = Curses::NUM_DEFAULT_COLORS / 2;
  99   for (x = 0; x < Curses::NUM_DEFAULT_COLORS; ++x)
 100     if (x < half) {
 101       // The first line.
 102       addButton(x * 2, y, x, default_color);
 103     }
 104     else {
 105       // The second line.
 106       addButton((x - half) * 2, y + 1, x, default_color);
 107     }
 108 }
 109
 110 void ColorPickerPalette::addGrayscale(int default_color)
 111 {
 112   int w, h, x, y, color;
 113
 114   // Resize the ColorPickerPalette.
 115   w = getWidth();
 116   h = getHeight();
 117
 118   // Add space between this and previous section.
 119   if (h != 0)
 120     ++h;
 121
 122   y = h;
 123   w = std::max(w, (GRAYSCALE_END - GRAYSCALE_START + 1) * 2);
 124   h = h + 1;
 125
 126   resize(w, h);
 127
 128   // Add the color picker buttons.
 129   for (color = GRAYSCALE_START, x = 0; color <= GRAYSCALE_END; ++color, x += 2)
 130     addButton(x, y, color, default_color);
 131
 132   addButton(x, y, Curses::Color::WHITE, default_color);
 133 }
 134
 135 void ColorPickerPalette::addColorCube(int default_color)
 136 {
 137   int w, h, x, y;
 138
 139   // Resize the ColorPickerPalette.
 140   w = getWidth();
 141   h = getHeight();
 142
 143   // Add space between this and previous section.
 144   if (h != 0)
 145     ++h;
 146
 147   y = h;
 148
 149   w = std::max(w, (6 * 6 * 2) + 5);
 150   h = h + 6;
 151
 152   resize(w, h);
 153
 154   // Add the color picker buttons.
 155   x = 0;
 156   for (int g = 0; g < 6; ++g) {
 157     for (int r = 0; r < 6; ++r) {
 158       for (int b = 0; b < 6; ++b) {
 159         addButton(x, y, 16 + (r * 36) + (g * 6) + b, default_color);
 160         x += 2;
 161       }
 162
 163       ++x;
 164     }
 165
 166     ++y;
 167     x = 0;
 168   }
 169 }
 170
 171 ColorPickerPalette::ColorPickerPaletteButton::ColorPickerPaletteButton(
 172   int color)
 173   : Button(2, 1, ""), color_(color)
 174 {
 175 }
 176
 177 int ColorPickerPalette::ColorPickerPaletteButton::draw(
 178   Curses::ViewPort area, Error &error)
 179 {
 180   ColorScheme::Color c(Curses::Color::BLACK, color_);
 181   int attrs;
 182   if (COLORSCHEME->getColorPair(c, &attrs, error) != 0)
 183     return error.getCode();
 184
 185   if (has_focus_) {
 186     DRAW(area.attrOn(Curses::Attr::REVERSE, error));
 187     DRAW(area.addString(0, 0, "@@", error));
 188     DRAW(area.attrOff(Curses::Attr::REVERSE, error));
 189   }
 190   else
 191     DRAW(area.fill(attrs, 0, 0, 2, 1, error));
 192
 193   return 0;
 194 }
 195
 196 } // namespace CppConsUI
 197
 198 // vim: set tabstop=2 shiftwidth=2 textwidth=80 expandtab: