Qt 自定义PushButton

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功能：鼠标弹起并在按键区域内时，按键响应。并实现normal、hover、pressed效果，PushButton大小默认为传入图片大小。

源码：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);}PushButton::~PushButton(){}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 PushButton::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();    }}

.h文件

#ifndef PUSHBUTTON_H#define PUSHBUTTON_H#include <QPushButton>#define Normal 0#define Hover 1#define Pressed 2class QPixmap;class PushButton : public QPushButton{    //Q_OBJECTpublic:    explicit PushButton(QString normal, QString hover, QString pressed, QWidget *parent=0);    explicit PushButton(QString background, QWidget *parent=0);    ~PushButton();    bool isOnPushButton(const QPoint &point, const PushButton *pushButton);protected:    void paintEvent(QPaintEvent *);    void enterEvent(QEvent *);    void leaveEvent(QEvent *);    void mousePressEvent(QMouseEvent *e);    void mouseReleaseEvent(QMouseEvent *e);    //void loadPixmap(QString path);private:    char buttonState;    QPixmap normalPixmap;    QPixmap hoverPixmap;    QPixmap pressPixmap;};#endif // PUSHBUTTON_H

效果：

eg:

PushButton *xxx = new PushButton(":/image/contact.png",":/image/cut-the-rope.png",":/image/drop.png",this);

以上留存...

出处:Qt 自定义PushButton

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