窗体部件之自定义PushButton

pushbutton.cpp

#include "pushbutton.h"#include <QPainter>#include <QMouseEvent>#include <QFontMetrics>#include <QLabel>PushButton::PushButton(QString normal, QString hover, QString pressed, QWidget *parent) :    QPushButton(parent){    buttonState = Normal;    normalPixmap.load(normal);    hoverPixmap.load(hover);    pressPixmap.load(pressed);    this->setFixedSize(normalPixmap.size());    this->setContentsMargins(0, 0, 0, 0);}PushButton::PushButton(QString background, QWidget *parent) :    QPushButton(parent){    buttonState = Normal;    normalPixmap.load(background);    hoverPixmap.load(background);    pressPixmap.load(background);    this->setFixedSize(normalPixmap.size());    this->setContentsMargins(0, 0, 0, 0);}void PushButton::paintEvent(QPaintEvent *){    QPainter painter(this);    switch(buttonState)    {    case Normal:        painter.drawPixmap(this->rect(), normalPixmap);        break;    case Hover:        painter.drawPixmap(this->rect(), hoverPixmap);        break;    case Pressed:        painter.drawPixmap(this->rect(), pressPixmap);    }    painter.drawText(this->rect(), Qt::AlignCenter, this->text());}void PushButton::enterEvent(QEvent *){    buttonState = Hover;    update();}void PushButton::leaveEvent(QEvent *){    buttonState = Normal;    update();}void PushButton::mousePressEvent(QMouseEvent *e){    if(e->button() == Qt::LeftButton)    {        buttonState = Pressed;        update();    }}bool isOnPushButton(const QPoint &point, const PushButton *pushButton){    if(point.x() < 0 || point.x() > pushButton->width() ||            point.y() < 0 || point.y() > pushButton->height())    {        return false;    }    return true;}void PushButton::mouseReleaseEvent(QMouseEvent *e){    if(e->button() == Qt::LeftButton)    {        //判断鼠标抬起时是否在PushButton之上        if(isOnPushButton(e->pos(), this))        {            emit clicked();        }        buttonState = Hover;        update();    }}

另外一种用图片组分割的方法设置样式表

QPushButton
{
border-image: url(:/images/9d.png) 0 354 0 0;
}
QPushButton:hover
{
border-image:url(:/images/9d.png) 0 236 0 118;
}
QPushButton:pressed
{
border-image:url(:/images/9d.png) 0 118 0 236;
}