Qt的右下角彈出框、歡迎討論

本例子主要使用QPropertyAnimation作為動畫類。

直接上程式碼、註釋應該很清楚了、

main.cpp

#include <QtGui/QApplication>
#include "dialog.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    Dialog w;
    w.show();
    
    return a.exec();
}

#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>
#include <QDesktopWidget>
#include <QPropertyAnimation>
#include <QPoint>
#include <QTimer>

namespace Ui {
class Dialog;
}

class Dialog : public QDialog
{
    Q_OBJECT
    
public:
    explicit Dialog(QWidget *parent = 0);
    ~Dialog();
    
private:
    Ui::Dialog *ui;
    QDesktopWidget desktop;
    QPropertyAnimation* animation;
    QTimer *remainTimer;

    void showAnimation();
private slots:
    void closeAnimation();
    void clearAll();
};

#endif // DIALOG_H
 

#include "dialog.h"
#include "ui_dialog.h"
#include <QDebug>

Dialog::Dialog(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog)
{
    ui->setupUi(this);
    this->setWindowFlags(Qt::FramelessWindowHint); //隱藏選單欄
    this->move((desktop.availableGeometry().width()-this->width()),desktop.availableGeometry().height());//初始化位置到右下角
    showAnimation(); //開始顯示右下角彈出框
}

Dialog::~Dialog()
{
    delete ui;
}
//彈出動畫
void Dialog::showAnimation(){
    //顯示彈出框動畫
    animation=new QPropertyAnimation(this,"pos");
    animation->setDuration(2000);
    animation->setStartValue(QPoint(this->x(),this->y()));
    animation->setEndValue(QPoint((desktop.availableGeometry().width()-this->width()),(desktop.availableGeometry().height()-this->height())));
    animation->start();

    //設定彈出框顯示2秒、在彈回去
    remainTimer=new QTimer();
    connect(remainTimer,SIGNAL(timeout()),this,SLOT(closeAnimation()));
    remainTimer->start(4000);//彈出動畫2S,停留2S回去
}
//關閉動畫
void Dialog::closeAnimation(){
    //清除Timer指標和訊號槽
    remainTimer->stop();
    disconnect(remainTimer,SIGNAL(timeout()),this,SLOT(closeAnimation()));
    delete remainTimer;
    remainTimer=NULL;
    //彈出框回去動畫
    animation->setStartValue(QPoint(this->x(),this->y()));
    animation->setEndValue(QPoint((desktop.availableGeometry().width()-this->width()),desktop.availableGeometry().height()));
    animation->start();
    //彈回動畫完成後清理動畫指標
    connect(animation,SIGNAL(finished()),this,SLOT(clearAll()));
}
//清理動畫指標
void Dialog::clearAll(){
    disconnect(animation,SIGNAL(finished()),this,SLOT(clearAll()));
    delete animation;
    animation=NULL;
}