source/frontend/widgets/ledbutton.cpp

   1 /*
   2  * LED Button, a custom Qt4 widget
   3  * Copyright (C) 2011-2013 Filipe Coelho <falktx@falktx.com>
   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 as
   7  * published by the Free Software Foundation; either version 2 of
   8  * the License, or 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. See the
  13  * GNU General Public License for more details.
  14  *
  15  * For a full copy of the GNU General Public License see the doc/GPL.txt file.
  16  */
  17
  18 #include "ledbutton.hpp"
  19
  20 #include <QtGui/QPainter>
  21 #include <QtGui/QPaintEvent>
  22
  23 LEDButton::LEDButton(QWidget* parent):
  24     QPushButton(parent),
  25     fColor(OFF),
  26     fLastColor(OFF),
  27     fPixmapRect(0, 0, 0, 0)
  28 {
  29     setCheckable(true);
  30     setText("");
  31
  32     setColor(BLUE);
  33
  34     // matching fLastColor
  35     fPixmap.load(":/scalable/led_off.svg");
  36 }
  37
  38 void LEDButton::setColor(Color color)
  39 {
  40     fColor = color;
  41     int size = 14;
  42
  43     fPixmapRect = QRectF(0, 0, size, size);
  44
  45     setMinimumSize(size, size);
  46     setMaximumSize(size, size);
  47 }
  48
  49 void LEDButton::paintEvent(QPaintEvent* event)
  50 {
  51     QPainter painter(this);
  52     event->accept();
  53
  54     if (isChecked())
  55     {
  56         if (fLastColor != fColor)
  57         {
  58             switch (fColor)
  59             {
  60             case OFF:
  61                 fPixmap.load(":/scalable/led_off.svg");
  62                 break;
  63             case BLUE:
  64                 fPixmap.load(":/scalable/led_blue.svg");
  65                 break;
  66             case GREEN:
  67                 fPixmap.load(":/scalable/led_green.svg");
  68                 break;
  69             case RED:
  70                 fPixmap.load(":/scalable/led_red.svg");
  71                 break;
  72             case YELLOW:
  73                 fPixmap.load(":/scalable/led_yellow.svg");
  74                 break;
  75             default:
  76                 return;
  77             }
  78
  79             fLastColor = fColor;
  80         }
  81     }
  82     else if (fLastColor != OFF)
  83     {
  84         fPixmap.load(":/scalable/led_off.svg");
  85         fLastColor = OFF;
  86     }
  87
  88     painter.drawPixmap(fPixmapRect, fPixmap, fPixmapRect);
  89 }