Qt 图片随窗口改变

兼容适配 软件兼容
1 


#include <QApplication>
#include <QWidget>
#include <QPainter>
#include <QBrush>
#include <QPicture>
#include <QFont>
#include <QtGui>

class PainterWidget: public QWidget
{
  protected:
   void paintEvent(QPaintEvent *);

};

void PainterWidget::paintEvent(QPaintEvent *event)
{

 

   /************************
   图片随窗体改变而改变
   ************************/


   QLabel *label = new QLabel;
   label->setPixmap(QPixmap("c:/painterwidget/images/house.png"));
   label->setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored); //忽视初始图片值
   label->setScaledContents(true);  //设置可改变的内容

   QScrollArea *scroll=new QScrollArea;

   scroll->setWidgetResizable(true);


   scroll->setWidget(label);

   QHBoxLayout *main=new QHBoxLayout;
   main->addWidget(scroll);
   setLayout(main);


}

int main(int argc,char **argv)
{
  QApplication app(argc,argv);
  PainterWidget pWidget;
  pWidget.resize(400,400);
  pWidget.show();

  return app.exec();
}