Qt实现贴边隐藏qt,c++终曲-

类似于qq，当窗口移动到桌面上边缘时，鼠标离开窗口，窗口将会自动向上隐藏，当鼠标回到靠边的位置，窗口又显示出来。

• 先看效果图：
  

代码如下 ：

• widget.h

#ifndef WIDGET_H #define WIDGET_H #include <QWidget> enum HIDEPOSATION//隐藏位置 {     HP_None = 0,     HP_Top = 1,     HP_Left = 2,     HP_Right = 3 }; class Widget : public QWidget {     Q_OBJECT  public: Widget(QWidget *parent = nullptr); bool isWindowInScreen(QPoint pos); void hideWindow(); void showWindow(); protected: void mousePressEvent(QMouseEvent *event) override; void mouseReleaseEvent(QMouseEvent *event) override; void mouseMoveEvent(QMouseEvent *event) override; void enterEvent(QEvent *event) override; void leaveEvent(QEvent *event) override; private: int m_screenWidth; bool m_isLMousePress;     QPoint m_relativePos;     HIDEPOSATION m_hp; }; #endif // WIDGET_H 

• widget.cpp

#include "widget.h" #include <QMouseEvent> #include <QPropertyAnimation> #include <QApplication> #include <QScreen>  Widget::Widget(QWidget *parent) : QWidget(parent) , m_isLMousePress(false) , m_relativePos(0,0) { //获取桌面宽度     QRect rect = QGuiApplication::primaryScreen()->geometry();     m_screenWidth = rect.width(); setWindowFlags(Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint); resize(450,650); } //判断当前鼠标位置，并根据位置确定信息 bool Widget::isWindowInScreen(QPoint pos) { if(pos.x()<5){         m_hp = HP_Left; return false; } else if(pos.x()>m_screenWidth-5){         m_hp = HP_Right; return false; } else if(pos.y()<5){         m_hp = HP_Top; return false; } else{         m_hp = HP_None; return true; } } //隐藏窗口的动画 void Widget::hideWindow() {     QPropertyAnimation * animation = new QPropertyAnimation(this, "geometry");     animation->setStartValue(QRect(x(),y(),width(),height())); if(m_hp == HP_Top)         animation->setEndValue(QRect(x(),2-height(),width(),height())); else if(m_hp == HP_Left)         animation->setEndValue(QRect(2-width(),y(),width(),height())); else if(m_hp == HP_Right)         animation->setEndValue(QRect(m_screenWidth-2,y(),width(),height()));     animation->setDuration(250);     animation->start(); } //显示窗口的动画 void Widget::showWindow() {     QPropertyAnimation * animation = new QPropertyAnimation(this, "geometry");     animation->setStartValue(QRect(x(),y(),width(),height())); if(m_hp == HP_Top)         animation->setEndValue(QRect(x(),0,width(),height())); else if(m_hp == HP_Left)         animation->setEndValue(QRect(0,y(),width(),height())); else if(m_hp == HP_Right)         animation->setEndValue(QRect(m_screenWidth-width(),y(),width(),height()));     animation->setDuration(250);     animation->start(); } void Widget::mousePressEvent(QMouseEvent *event) { if(event->button() == Qt::LeftButton) {         m_isLMousePress = true;         m_relativePos = event->globalPos() - pos();//记录相对位置 } } void Widget::mouseReleaseEvent(QMouseEvent *event) { Q_UNUSED(event)     m_isLMousePress = false; } void Widget::mouseMoveEvent(QMouseEvent *event) { if(m_isLMousePress && isWindowInScreen(event->globalPos())) move(event->globalPos()-m_relativePos);//实现无边框移动 else if(m_isLMousePress && !isWindowInScreen(event->globalPos())) { //特殊位置，移动规则不同 int x = event->globalPos().x(); int y = event->globalPos().y(); if(m_hp == HP_Top)//比如当前鼠标位置为屏幕最上面时，将纵坐标拉至鼠标处，此后只改变横坐标 move(x-m_relativePos.x(),y); else if(m_hp == HP_Left) move(x,y-m_relativePos.y()); else if(m_hp == HP_Right) move(x-width(),y-m_relativePos.y()); } } void Widget::enterEvent(QEvent *event) { Q_UNUSED(event) if(m_hp != HP_None) showWindow(); } void Widget::leaveEvent(QEvent *event) { Q_UNUSED(event) if(m_hp != HP_None) hideWindow(); }