28.开始画面和异形窗口

开始画面

 1 #include "widget.h"
 2 #include <QApplication>
 3 #include <QSplashScreen>
 4 
 5 int main(int argc, char *argv[])
 6 {
 7     QApplication a(argc, argv);
 8     QPixmap pix("16.png");
 9     QSplashScreen splash(pix);
10     splash.show();
11 
12     a.processEvents();
13     Widget w;
14     w.show();
15 
16     return a.exec();
17 }

异形窗口

widget.h

 1 #ifndef WIDGET_H
 2 #define WIDGET_H
 3 
 4 #include <QWidget>
 5 
 6 namespace Ui {
 7 class Widget;
 8 }
 9 
10 class Widget : public QWidget
11 {
12     Q_OBJECT
13 
14 public:
15     explicit Widget(QWidget *parent = 0);
16     ~Widget();
17     void paintEvent(QPaintEvent *);
18 
19 private:
20     Ui::Widget *ui;
21 };
22 
23 #endif // WIDGET_H

widget.cpp

 1 #include "widget.h"
 2 #include "ui_widget.h"
 3 #include <QPixmap>
 4 #include <QBitmap>
 5 #include <QPainter>
 6 
 7 Widget::Widget(QWidget *parent) :
 8     QWidget(parent),
 9     ui(new Ui::Widget)
10 {
11    // ui->setupUi(this);
12     QPixmap pix;
13     pix.load("16.png",0,Qt::AvoidDither | Qt::ThresholdAlphaDither|Qt::ThresholdDither);
14     resize(pix.size());
15     setMask(QBitmap(pix.mask()));//初始化
16 }
17 
18 Widget::~Widget()
19 {
20     delete ui;
21 }
22 
   //创建绘画事件
23 void Widget::paintEvent(QPaintEvent *)
24 {
25     QPainter painter(this);
26     painter.drawPixmap(0,0,QPixmap("16.png"));
27 }