QT自定义标题栏

效果

1、自定义标题栏

2、QT自带标题栏

自定义标题栏类的代码

1、ui界面

2、.h

#include <QWidget>
#include <QEvent>
#include <QDockWidget>
#include <QMouseEvent>

namespace Ui {
class mTitleBar;
}

class mTitleBar : public QWidget
{
    //Q_OBJECT
public:
    explicit mTitleBar(QString title,QWidget *parent = nullptr);
    ~mTitleBar();
    void mousePressEvent(QMouseEvent *event);
    void mouseMoveEvent(QMouseEvent *event);
    void mouseReleaseEvent(QMouseEvent *event);

private:
    Ui::mTitleBar *ui;
    bool            mPressBool;
    QPoint          mouseStartPoint;
    QPoint          mwindowTopLeftPoint;
    QDockWidget*    mpDockMouse;

};
           

3、.cpp

#include "mtitlebar.h"
#include "ui_mtitlebar.h"
#include <QDockWidget>
#include <QWidget>
//构造函数
mTitleBar::mTitleBar(QString title,QWidget *parent) :
    QWidget(parent),
    ui(new Ui::mTitleBar)
{
 	ui->setupUi(this);
    mpDockMouse = new QDockWidget(this);
    mpDockMouse->hide();
    ui->label->setText(title);
    //囗:最大化/恢复
    connect(ui->pushButton, &QPushButton::clicked, [=]
    {
        mpDockMouse = qobject_cast<QDockWidget*>(parentWidget());
        if (mpDockMouse != nullptr)
        {
            if(mpDockMouse->isMaximized())  //显示原来的大小
            {
                mpDockMouse->showNormal();
            }
            else //最大化
            {
                mpDockMouse->showMaximized();
            }

        }
    });
    //× 关闭
    connect(ui->pushButton2, &QPushButton::clicked, [=]
    {
        mpDockMouse = qobject_cast<QDockWidget*>(parentWidget());
        if (mpDockMouse != nullptr)
        {
            mpDockMouse->close();
        }
    });
    //- 最小化
    connect(ui->pushButton3, &QPushButton::clicked, [=]
    {
        mpDockMouse = qobject_cast<QDockWidget*>(parentWidget());
//        mpDockMouse->showMinimized();
        mpDockMouse->hide();


    });
}
           

//鼠标事件
void mTitleBar::mousePressEvent(QMouseEvent *event)
{

    if(event->button() == Qt::LeftButton)
    {
        mPressBool = true;
        //获得鼠标的初始位置
        mouseStartPoint = event->globalPos();
        //获得窗口的初始位置
        mpDockMouse = qobject_cast<QDockWidget*>(parentWidget());
        mwindowTopLeftPoint = mpDockMouse->frameGeometry().topLeft();

    }
}

void mTitleBar::mouseMoveEvent(QMouseEvent *event)
{
    if(mPressBool)
    {
        //获得鼠标移动的距离
        QPoint distance = event->globalPos() - mouseStartPoint;
        //改变窗口的位置
        mpDockMouse = qobject_cast<QDockWidget*>(parentWidget());
        mpDockMouse->move(mwindowTopLeftPoint + distance);
    }
}

void mTitleBar::mouseReleaseEvent(QMouseEvent *event)
{
    if(event->button() == Qt::LeftButton)
    {
        mPressBool = false;
    }
}
           

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提取码：wzds

自定义标题栏