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最新推荐文章于 2025-05-13 14:38:00 发布

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#ifndef MYBUTTON_H
#define MYBUTTON_H

#include <<span style="font-family: Arial, Helvetica, sans-serif;">QPushButton</span><span style="font-family: Arial, Helvetica, sans-serif;">></span>

class MyButton : public QPushButton
{
    Q_OBJECT
public:
    explicit MyButton(QWidget *parent = 0);
    MyButton(const QString& text, QWidget* parent = 0);

    QRect _rect;
    QString _text;
    bool _pressed;
    void mousePressEvent(QMouseEvent *);
    void mouseReleaseEvent(QMouseEvent *);

    void paintEvent(QPaintEvent *);

signals:
    void clicked();

public slots:

};

#endif // MYBUTTON_H

#include "MyButton.h"
#include <QPainter>
#include <QMouseEvent>
MyButton::MyButton(QWidget *parent) :
    QWidget(parent), _rect(0, 0, size().widht, size().height), _text(QString())
{
    _pressed = false;

   
}

MyButton::MyButton(const QString &text, QWidget *parent):
    QWidget(parent), _text(text), _rect(0, 0, 100, 30)
{
    _pressed = false;
    this->setGeometry(_rect);
}

void MyButton::mousePressEvent(QMouseEvent *)
{
    _pressed = true;
    update();
}

void MyButton::mouseReleaseEvent(QMouseEvent *ev)
{
    _pressed = false;
    update();

    if(_rect.contains(ev->pos()))
        emit clicked();
    // callback handler
}
void MyButton::paintEvent(QPaintEvent *)
{
    QPainter p(this);
    if(_pressed)
        p.setBrush(Qt::yellow);
    else
        p.setBrush(Qt::darkGray);
    p.drawRect(_rect);
    p.drawText(_rect, _text, QTextOption(Qt::AlignCenter));
}

完毕

学无止尽只能学个思想先后续看需要学习