DrawingWindow.cpp

   1 #include "DrawingWindow.h"
   2 #include <QPainter>
   3 #include <QPaintEvent>
   4
   5 #include <iostream>
   6
   7 DrawingWindow::DrawingWindow(DrawingArea &a)
   8     : QWidget()
   9     , drawingArea(a)
  10     , pixmap(a.size())
  11 {
  12     initialize();
  13 }
  14
  15 DrawingWindow::DrawingWindow(QWidget *parent, DrawingArea &a)
  16     : QWidget(parent)
  17     , drawingArea(a)
  18     , pixmap(a.size())
  19 {
  20     initialize();
  21 }
  22
  23 DrawingWindow::DrawingWindow(QWidget *parent, Qt::WindowFlags flags,
  24                              DrawingArea &a)
  25     : QWidget(parent, flags)
  26     , drawingArea(a)
  27     , pixmap(a.size())
  28 {
  29     initialize();
  30 }
  31
  32 void DrawingWindow::paintEvent(QPaintEvent *ev)
  33 {
  34     QRect rect = ev->rect();
  35     drawingArea.lock();
  36     if (drawingArea.isDirty()) {
  37         QPainter pixmapPainter(&pixmap);
  38         pixmapPainter.drawImage(drawingArea.getDirtyRect(),
  39                                 drawingArea.getImage(),
  40                                 drawingArea.getDirtyRect());
  41         drawingArea.setClean();
  42         rect |= drawingArea.getDirtyRect();
  43     }
  44     drawingArea.unlock();
  45     QPainter painter(this);
  46     painter.drawPixmap(0, 0, pixmap);
  47 }
  48
  49 void DrawingWindow::timerEvent(QTimerEvent *ev)
  50 {
  51     if (ev->timerId() == timer.timerId()) {
  52         update();
  53     } else {
  54         QWidget::timerEvent(ev);
  55     }
  56 }
  57
  58 void DrawingWindow::initialize()
  59 {
  60     setFocusPolicy(Qt::StrongFocus);
  61     setFixedSize(drawingArea.getImage().size());
  62     setAttribute(Qt::WA_OpaquePaintEvent);
  63     timer.start(50, this);
  64 }