QT-Qt图片按钮类

main.cpp

#include "mainwindow.h"

#include <QApplication>

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

TImageButton.h

#ifndef TIMAGEBUTTON_H
#define TIMAGEBUTTON_H

#include <QPushButton>
#include <QMouseEvent>
#include <QPainter>

class TImageButton : public QPushButton
{
    Q_OBJECT
public:
    TImageButton(QWidget *parent, QString normal, QString hover, QString lighted);
    ~TImageButton();
    void SetLighted(bool value);
public:
    void paintEvent(QPaintEvent* pEvent);
    void mousePressEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);
    void enterEvent(QEvent *e);
    void leaveEvent(QEvent *e);
protected:
    bool m_bLighted;
    bool m_bMouseIN;
    bool m_bLeftDown;
    QPixmap m_pHover;
    QPixmap m_pNormal;
    QPixmap m_pLighted;
    QString m_sHover;
    QString m_sNormal;
    QString m_sLighted;

};

#endif // TIMAGEBUTTON_H

TImageButton.cpp

#include "TImageButton.h"


TImageButton::TImageButton(QWidget *parent, QString normal, QString hover, QString lighted)
    :QPushButton(parent),
    m_bMouseIN(false),
    m_bLeftDown(false),
    m_bLighted(false)
{
    m_sNormal = normal;
    m_sHover = hover;
    m_sLighted = lighted;

    QImage *image = new QImage;
    image->load(m_sNormal);
    m_pNormal = QPixmap::fromImage(*image);
    QImage *image2 = new QImage;
    image2->load(m_sHover);
    m_pHover = QPixmap::fromImage(*image2);
    QImage *image3 = new QImage;
    image3->load(m_sLighted);
    m_pLighted = QPixmap::fromImage(*image3);

    this->setFixedWidth(m_pNormal.width());
    this->setFixedHeight(m_pNormal.height());
}

TImageButton::~TImageButton()
{

}

void TImageButton::SetLighted(bool value)
{
    if(value != m_bLighted)
    {
        m_bLighted=value;
        repaint();
    }
}

void TImageButton::paintEvent(QPaintEvent *pEvent)
{
    QPixmap* pPixmap;
    if(m_bLighted || m_bLeftDown)
        pPixmap=&m_pLighted;
    else
    {
        if(m_bMouseIN)
            pPixmap=&m_pHover;
        else
            pPixmap=&m_pNormal;
    }
    QPainter painter;
    painter.begin(this);
    if(pPixmap)
        painter.drawPixmap(rect(),*pPixmap);
    if(text().count() > 0)
        painter.drawText(rect(),Qt::AlignCenter,text());
    painter.end();
}

void TImageButton::mousePressEvent(QMouseEvent *e)
{
    if(e->button()==Qt::LeftButton)
        {
            m_bLeftDown=true;
            repaint();
        }
    QPushButton::mousePressEvent(e);
}

void TImageButton::mouseReleaseEvent(QMouseEvent *e)
{
    if(e->button()==Qt::LeftButton)
    {
        m_bLeftDown=false;
        repaint();
    }
    QPushButton::mouseReleaseEvent(e);
}

void TImageButton::enterEvent(QEvent *e)
{
    m_bMouseIN=true;
    repaint();
}

void TImageButton::leaveEvent(QEvent *e)
{
    m_bMouseIN=false;
    repaint();
}

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QHBoxLayout>
#include <QDialog>

#include "TImageButton.h"

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();

private:
    Ui::MainWindow *ui;

    QHBoxLayout *m_pHBoxLayout;
    TImageButton *m_pImageButton;

private slots:
    void on_bu();
};
#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    resize(400, 300);
    setWindowTitle(QStringLiteral("Qt图片按钮类"));

    m_pHBoxLayout = new QHBoxLayout(this);
    m_pImageButton = new TImageButton(this, ":/new/prefix1/A.png", ":/new/prefix1/B.png", ":/new/prefix1/C.png");
    m_pHBoxLayout->addWidget(m_pImageButton);
    // 设置显示内容，如果图片代文字的话就不需要这一行代码。
    m_pImageButton->setText(QString::fromLocal8Bit("123as"));
    // 设置字体为黑色，如果图片代文字的话就不需要这一行代码。
    m_pImageButton->setStyleSheet("color: rgb(0, 0, 0);");
    connect(m_pImageButton, &QPushButton::clicked, this, &MainWindow::on_bu);
    ui->centralwidget->setLayout(m_pHBoxLayout);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_bu()
{
    QDialog *odia = new QDialog;
    QHBoxLayout *ohb = new QHBoxLayout;
    QPushButton *obu = new QPushButton;
    obu->setText("OK");
    ohb->addWidget(obu);
    odia->setLayout(ohb);
    odia->show();
}

#ifndefMAINWINDOW_H

#defineMAINWINDOW_H

#include<QMainWindow>

#include<QHBoxLayout>

#include<QDialog>

#include"TImageButton.h"

QT_BEGIN_NAMESPACE

namespaceUi{classMainWindow;}

QT_END_NAMESPACE

classMainWindow:publicQMainWindow

{

Q_OBJECT

public:

MainWindow(QWidget*parent=nullptr);

~MainWindow();

private:

Ui::MainWindow*ui;

QHBoxLayout*m_pHBoxLayout;

TImageButton*m_pImageButton;

privateslots:

voidon_bu();

};

#endif//MAINWINDOW_H