Qt C++ 实现无边框窗口

Qt C++ 实现无边框窗口

// widget.h
#ifndef WIDGET_H
#define WIDGET_H

#include <QDebug>
#include <QHBoxLayout>
#include <QMouseEvent>
#include <QPushButton>
#include <QString>
#include <QWidget>

#define PADDING 6

enum Location {
    TOP,
    BOTTOM,
    LEFT,
    RIGHT,
    TOP_LEFT,
    TOP_RIGHT,
    BOTTOM_LEFT,
    BOTTOM_RIGHT,
    CENTER
};

class Widget : public QWidget {
    Q_OBJECT

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

protected:
    void mousePressEvent(QMouseEvent* event);
    void mouseMoveEvent(QMouseEvent* event);
    void mouseReleaseEvent(QMouseEvent* event);

private:
    void setCursorShape(const QPoint& point);

private:
    // 左键有没有按下
    bool isLeftPressed;
    // 鼠标按下的位置 偏移
    QPoint mouseOffset;
    Location location;
};
#endif  // WIDGET_H

// widget.cpp
#include "widget.h"

Widget::Widget(QWidget* parent) : QWidget(parent) {
    // 设置窗口的宽高
    this->setMinimumWidth(500);
    this->setMinimumHeight(300);

    // 设置背景色
    this->setStyleSheet("background: #303030");

    // 添加两个按钮 - 水平布局
    QHBoxLayout* layout = new QHBoxLayout(this);
    layout->setSpacing(10);
    layout->setContentsMargins(10, 10, 10, 10);

    QPushButton* btn1 = new QPushButton("确定");
    QPushButton* btn2 &#