QT学习之路 - Graphics View Framework（30）

930阅读　0评论2011-07-22　001xiaofei
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工程代码： 30.rar  
http://devbean.blog.51cto.com/448512/241186


  1. #include <QApplication>
  2. #include <QWidget>
  3. #include <QPainter>
  4. #include <QGraphicsScene>
  5. #include <QGraphicsView>

  7. class DrawApp : public QWidget
  8. {
  9. public:
  10.     DrawApp();
  11. protected: //重写 事件函数
  12.     void paintEvent(QPaintEvent *event);
  13. };

  15. DrawApp::DrawApp()
  16. {

  18. }

  20. void DrawApp::paintEvent(QPaintEvent *event)
  21. {
  22.     QPainter painter(this);
  23.     painter.drawLine(10,10,150,300);
  24. }

  26. int main(int argc, char *argv[])
  27. {
  28.     QApplication app(argc, argv);
  29.     QGraphicsScene *scene = new QGraphicsScene;
  30.     scene->addLine(10,10,150,300);
  31.     QGraphicsView *view = new QGraphicsView(scene);
  32.     view->resize(500,500);
  33.     view->setWindowTitle("Graphics View");
  34.     view->show();

  36.     DrawApp *da = new DrawApp;
  37.     da->resize(500,500);
  38.     da->setWindowTitle("Qwidget");
  39.     da->show();

  41.     return app.exec();
  42. }
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