窗體可以設置爲圖片的形狀
如下:
其實就是將窗體設置一個遮罩,此遮罩設爲圖片的遮罩即可
這裏還涉及到一些Event的函數重載,具體看代碼。
頭文件:
#include <QtGui/QWidget>
#include <QLabel>
#include <QPixmap>
class Widget : public QWidget
{
Q_OBJECT
public:
Widget(QWidget *parent = 0);
~Widget();
protected:
//這裏的三個函數都是重載函數,可以響應響應的事件
void mousePressEvent(QMouseEvent *);
void mouseMoveEvent(QMouseEvent *);
void paintEvent(QPaintEvent *);//這個在窗口需要重繪的時候自動調用
private slots:
void showtime();
private:
QPoint dragPosition;
QLabel *l;
QPixmap pix;
};
源文件:
#include "widget.h"
#include <QMouseEvent>
#include <QPainter>
#include <QBitmap>
#include <QGridLayout>
#include <QTimer>
#include <QTime>
Widget::Widget(QWidget *parent)
: QWidget(parent)
{
setWindowFlags(Qt::FramelessWindowHint);
QPalette p=palette();
p.setColor(QPalette::WindowText,Qt::green);
setPalette(p);
l=new QLabel;
QTime time=QTime::currentTime();
QGridLayout *mainLayout=new QGridLayout(this);
mainLayout->addWidget(l,0,0,Qt::AlignHCenter);
pix.load("qq.png",0,Qt::AvoidDither|Qt::ThresholdDither|Qt::ThresholdAlphaDither);
resize(pix.size());
setMask(QBitmap(pix.mask()));
QTimer *timer=new QTimer;
connect(timer,SIGNAL(timeout()),this,SLOT(showtime()));
timer->start(10);
}
Widget::~Widget()
{
}
void Widget::showtime()
{
QTime time=QTime::currentTime();
l->setText(time.toString("A hh:mm:ss"));
}
void Widget::mousePressEvent(QMouseEvent *event)
{
if(event->button()==Qt::LeftButton)
{
dragPosition=event->globalPos()-frameGeometry().topLeft();
event->accept();
}
else if(event->button()==Qt::RightButton)
{
close();
}
}
void Widget::mouseMoveEvent(QMouseEvent *event)
{
move(event->globalPos()-dragPosition);
event->accept();
}
void Widget::paintEvent(QPaintEvent *event)
{
QPainter painter(this);
painter.drawPixmap(0,0,QPixmap("qq.png"));
}
下面三個函數是響應各個事件的
前面兩個爲了實現可拖動,時鐘程序也用了
後面那個爲了顯示圖片
可以看到,程序被拖動到了右邊。