自定义不规则形状窗体实现-优快云博客

本文链接：https://blog.youkuaiyun.com/yudiyanwang/article/details/53439902

本文介绍如何创建一个不规则形状的窗体，通过QPixmap加载图像并设置遮罩，实现窗体跟随鼠标拖动，并在鼠标右键点击时关闭窗体。代码中详细展示了鼠标事件处理和绘图事件的方法。

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#ifndef WIDGET_H
#define WIDGET_H

#include 
   
   
    
    
#include 
    
    
     
     
#include 
     
     
      
      
#include 
      
      
       
       
#include 
       
       
         #include 
        
          class Widget : public QWidget { Q_OBJECT public: Widget(QWidget *parent = 0); ~Widget(); protected: void mousePressEvent(QMouseEvent *event); void mouseMoveEvent(QMouseEvent *evnet); void paintEvent(QPaintEvent *); private: QPoint dragPosition; }; #endif // WIDGET_H #include "widget.h" Widget::Widget(QWidget *parent) : QWidget(parent) { QPixmap pix; pix.load(":/20.png"); resize(pix.size()); setMask(QBitmap(pix.mask())); //重点在这里 } Widget::~Widget() { } void Widget::mousePressEvent(QMouseEvent *event) { if(event->button() == Qt::LeftButton) { dragPosition = event->globalPos() - frameGeometry().topLeft(); event->accept(); } if(event->button() == Qt::RightButton) { close(); } } void Widget::mouseMoveEvent(QMouseEvent *event) { if(event->buttons() & Qt::LeftButton) { move(event->globalPos() - dragPosition); event->accept(); } } void Widget::paintEvent(QPaintEvent *) { QPainter painter(this); painter.drawPixmap(0,0,QPixmap(":/20.png")); } #include "widget.h" #include 
         
           int main(int argc, char *argv[]) { QApplication a(argc, argv); Widget w; w.show(); return a.exec(); }

不规则的窗体