QPushButton 控制两种状态

【1】Custom.cpp

 #include "CustomButton.h"

 CustomButton::CustomButton(QWidget* parent)
     : QPushButton(parent)
     , m_bCheckState(false)
 {
     setFixedSize(, );
     setFlat(true);
 }

 void CustomButton::mousePressEvent(QMouseEvent *event)
 {
     if (m_bCheckState)
     {
         m_bCheckState = false;
         setStyleSheet("QPushButton{background-image:url(:/new/image/mute.png);border:none;}");
     }
     else
     {
         m_bCheckState = true;
         setStyleSheet("QPushButton{background-image:url(:/new/image/unmute.png);border:none;}");
     }

     return QPushButton::mousePressEvent(event);
 }

【2】Custom.h

 #ifndef CUSTOMBUTTON_H
 #define CUSTOMBUTTON_H

 #include <QPushButton>

 class CustomButton : public QPushButton
 {
 public:
     CustomButton(QWidget* parent = Q_NULLPTR);

 protected:
     void mousePressEvent(QMouseEvent* event);

 private:
     bool m_bCheckState;
 };

 #endif // CUSTOMBUTTON_H

【3】pro

#-------------------------------------------------
#
# Project created by QtCreator
#
#-------------------------------------------------

QT       += core gui

greaterThan(QT_MAJOR_VERSION, ): QT += widgets

TARGET = TestState
TEMPLATE = app

# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked as deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS

# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.

SOURCES += main.cpp\
        widget.cpp \
    CustomButton.cpp

HEADERS  += widget.h \
    CustomButton.h

FORMS    += widget.ui

RESOURCES += \
    image.qrc

【4】其他默认文件

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