src/widgets.cpp

   1 /*
   2 Copyright (C) 2004-2011 Parallel Realities
   3 Copyright (C) 2011-2015 Perpendicular Dimensions
   4
   5 This program is free software; you can redistribute it and/or
   6 modify it under the terms of the GNU General Public License
   7 as published by the Free Software Foundation; either version 2
   8 of the License, or (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  13
  14 See the GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20 */
  21
  22 #include "widgets.h"
  23
  24 /**
  25 * Draws the options for a radio button widget with the currently selected
  26 * option highlighted
  27 * @param widget The radio button widget
  28 * @param maxWidth The width of the largest widget (used for spacing)
  29 */
  30 void drawOptions(Widget *widget, int maxWidth)
  31 {
  32         int x = widget->x + maxWidth + 55;
  33
  34         int count = 0;
  35
  36         char *c = widget->options;
  37
  38         SDL_Surface *text;
  39
  40         while (*c)
  41         {
  42                 char token[100];
  43                 unsigned int token_len;
  44
  45                 char *eow = strchr (c, '|');
  46                 if (!eow)
  47                         eow = strchr (c, 0);
  48
  49                 token_len = eow - c;
  50                 if (token_len > sizeof (token) - 1)
  51                         token_len = sizeof (token) - 1;
  52                 memcpy (token, c, token_len);
  53                 token [token_len] = 0;
  54
  55                 c = eow;
  56                 if (*c)
  57                         c++;
  58
  59                 if (widget->enabled)
  60                 {
  61                         graphics.setFontColor(0xff, 0xff, 0xff, 0x00, 0x00, 0x00);
  62                         if (count == *widget->value)
  63                                 graphics.setFontColor(0x00, 0x00, 0x00, 0x00, 0xff, 0x00);
  64                 }
  65                 else
  66                 {
  67                         graphics.setFontColor(0x77, 0x77, 0x77, 0x00, 0x00, 0x00);
  68                 }
  69
  70                 text = graphics.getString(token, false);
  71
  72                 if ((widget->enabled) && (count == *widget->value))
  73                         graphics.drawWidgetRect(x, widget->y, text->w, text->h);
  74
  75                 graphics.blit(text, x, widget->y, graphics.screen, false);
  76
  77                 x += text->w + 25;
  78                 count++;
  79         }
  80 }
  81
  82 /**
  83 * Draws a horizontal slider widget with its current value
  84 * used to fill the bar
  85 * @param widget The slider widget
  86 * @param maxWidth The width of the largest widget (used for spacing)
  87 */
  88 void drawSlider(Widget *widget, int maxWidth)
  89 {
  90         int x = widget->x + maxWidth + 50;
  91
  92         if (widget->enabled)
  93         {
  94                 graphics.drawRect(x, widget->y, 300, 18, graphics.white, graphics.screen);
  95         }
  96         else
  97         {
  98                 graphics.drawRect(x, widget->y, 300, 18, graphics.grey, graphics.screen);
  99         }
 100
 101         graphics.drawRect(x + 1, widget->y + 1, 298, 16, graphics.black, graphics.screen);
 102
 103         float width = 296.00 / widget->max;
 104
 105         width *= *widget->value;
 106
 107         if (widget->enabled)
 108         {
 109                 graphics.drawRect(x + 2, widget->y + 2, (int)width, 14, graphics.green, graphics.screen);
 110         }
 111         else
 112         {
 113                 graphics.drawRect(x + 2, widget->y + 2, (int)width, 14, graphics.darkGreen, graphics.screen);
 114         }
 115
 116 }
 117
 118 /**
 119 * Draws a widget used to represent joypad buttons. A widget with a value of
 120 * -1000 or less appears as ...
 121 * @param widget The Joypad Button widget
 122 */
 123 void drawJoypadButtonOption(Widget *widget)
 124 {
 125         graphics.setFontColor(0xff, 0xff, 0xff, 0x00, 0x00, 0x00);
 126
 127         int x = 300;
 128
 129         char text[25];
 130         text[0] = 0;
 131
 132         // joysticks have a button 0 so we can't
 133         // do the same thing as the keyboard(!)
 134         if (*widget->value <= -1000)
 135         {
 136                 snprintf(text, sizeof text, "...");
 137         }
 138         else if (*widget->value == -2)
 139         {
 140                 snprintf(text, sizeof text, "N/A");
 141         }
 142         else
 143         {
 144                 snprintf(text, sizeof text, "Button #%d", *widget->value);
 145         }
 146
 147         graphics.drawString(text, x, widget->y, TXT_LEFT, graphics.screen);
 148 }
 149
 150 /**
 151 * Draws a widget used to represent a key based on the widget's current value
 152 * @param widget The Widget
 153 */
 154 void drawKeyOption(Widget *widget)
 155 {
 156         graphics.setFontColor(0xff, 0xff, 0xff, 0x00, 0x00, 0x00);
 157
 158         int x = 300;
 159
 160         graphics.drawString(Keyboard::translateKey(*widget->value),
 161                             x, widget->y, TXT_LEFT, graphics.screen);
 162 }
 163
 164 /**
 165 * Creates an image for the specified image. The text colour and background
 166 * colour as set depending on the status of the widget
 167 * @param widget The Widget to create the image for
 168 */
 169 void generateWidgetImage(Widget *widget)
 170 {
 171         if (widget == engine.highlightedWidget)
 172         {
 173                 graphics.setFontColor(0x00, 0x00, 0x00, 0x00, 0xff, 0x00);
 174         }
 175         else
 176         {
 177                 if (widget->enabled)
 178                 {
 179                         graphics.setFontColor(0xff, 0xff, 0xff, 0x00, 0x00, 0x00);
 180                 }
 181                 else
 182                 {
 183                         graphics.setFontColor(0x77, 0x77, 0x77, 0x00, 0x00, 0x00);
 184                 }
 185         }
 186
 187         widget->image = graphics.getString(widget->label, false);
 188 }
 189
 190 /**
 191 * Draws all the widgets in their specified positions. Widgets that
 192 * have no image have an image created for them. Invisible widgets
 193 * are not drawn.
 194 */
 195 void drawWidgets()
 196 {
 197         graphics.setFontSize(0);
 198
 199         Widget *widget = (Widget*)engine.widgetList.getHead();
 200
 201         int maxWidth = 0;
 202
 203         while (widget->next != NULL)
 204         {
 205                 widget = (Widget*)widget->next;
 206
 207                 if (widget->image == NULL)
 208                 {
 209                         generateWidgetImage(widget);
 210                 }
 211
 212                 maxWidth = max(maxWidth, widget->image->w);
 213         }
 214
 215         widget = (Widget*)engine.widgetList.getHead();
 216
 217         while (widget->next != NULL)
 218         {
 219                 widget = (Widget*)widget->next;
 220
 221                 if (!widget->visible)
 222                 {
 223                         continue;
 224                 }
 225
 226                 if ((!widget->value) && (widget->type != WG_LABEL))
 227                 {
 228                         debug(("WARNING: Widget variable for '%s' not set!\n", widget->name));
 229                         continue;
 230                 }
 231
 232                 if (widget->x == -1)
 233                 {
 234                         widget->x = (640 - widget->image->w) / 2;
 235                 }
 236
 237                 if (widget == engine.highlightedWidget)
 238                 {
 239                         graphics.drawWidgetRect(widget->x, widget->y, widget->image->w, widget->image->h);
 240                 }
 241                 else
 242                 {
 243                         graphics.drawRect(widget->x - 3, widget->y - 2, widget->image->w + 6, widget->image->h + 4, graphics.black, graphics.screen);
 244                 }
 245
 246                 graphics.blit(widget->image, widget->x, widget->y, graphics.screen, false);
 247
 248                 switch (widget->type)
 249                 {
 250                         case WG_RADIO:
 251                                 drawOptions(widget, maxWidth);
 252                                 break;
 253                         case WG_SLIDER:
 254                         case WG_SMOOTH_SLIDER:
 255                                 drawSlider(widget, maxWidth);
 256                                 break;
 257                         case WG_KEYBOARD:
 258                                 drawKeyOption(widget);
 259                                 break;
 260                         case WG_JOYPAD:
 261                                 drawJoypadButtonOption(widget);
 262                                 break;
 263                 }
 264
 265                 widget->changed = false;
 266         }
 267 }