Qt模仿Visual Studio停靠窗口效果

#pragma once
#include <QWidget>
#include <QPaintEvent>
#include "QWHDockWidget.h"
class QMainWindow;
class QTabWidget;
class QDockWidget;
class QSplitter;
class QWHTabWidgetMask : public QWidget
{
	Q_OBJECT
public:
	enum Area
	{
		None,Top, Right, Bottom, Left, TopMore, RightMore, BottomMore, LeftMore, Center, TopMost, RightMost, BottomMost, LeftMost
	};
	QWHTabWidgetMask();
	~QWHTabWidgetMask();
	static QWHTabWidgetMask *getInstance();
	// 设置程序主窗口
	void setMainWindow(QMainWindow *mainWindow);
	// 创建停靠窗口
	QWHDockWidget *createDockWidget(QWHDockWidget::AreaMode areaMode, const QString &windowTitle = "");
	// 创建分裂器（水平分裂）
	QSplitter *createSplitter();
	// 创建分裂器（由参数orientation决定分裂方向）
	QSplitter *createSplitter(Qt::Orientation orientation);
	// 设置程序主分裂器
	void setMainSplitter(QSplitter *splitter);
	// 设置目标窗口（接收方）
	void setTargetWidget(QTabWidget *widget);
	// 设置当前页索引（鼠标移入当前页 或 鼠标移入中心方向标）
	void setCurTabIndex(int index);
	// 设置鼠标按下的停靠窗口（准备移动的窗口）
	void setMousePressed(QWHDockWidget *moveDockWidget);
	// 设置鼠标释放
	void setMouseReleased();
	// 获取停靠窗口推荐最小尺寸
	QSize minimumSizeHint() const override;
	// 获取鼠标按下的停靠窗口（准备移动或正在移动的窗口）
	QDockWidget *moveDockWidget();
	// 获取程序主分裂器
	QSplitter *mainSplitter();
	// 获取程序主窗口
	QMainWindow *mainWindow();
protected:
	void paintEvent(QPaintEvent *event);
private:
	// 获取指定索引的边界路径
	QPainterPath tabWidgetBorderPath(QTabWidget *tabWidget, int tabIndex);
	// 绘制主停靠窗口的指示器
	void drawMainDockIndicator();
	// 绘制次停靠窗口的指示器
	void drawMinorDockIndicator();
	// 检查鼠标所在方向标区域
	Area checkArea(QPoint globalPos);
signals:
	// 创建停靠窗口
	void dockWidgetAdded(QWHDockWidget *newDockWidget);
private:
	QMainWindow *m_mainWindow;
	QSplitter *m_mainSplitter;
	QWHDockWidget *m_moveDockWidget;
	QTabWidget *m_targetWidget;
	QList<QWHDockWidget *> m_listDockWidgets;
	int m_tabIndex;
	QColor m_borderColor;
	QColor m_bgColor;
	QRect m_centerRect;	// 中心矩形
	QRect m_topRect, m_rightRect, m_bottomRect, m_leftRect;	// 四个方位矩形（紧挨着中心矩形）
	QRect m_topMoreRect, m_rightMoreRect, m_bottomMoreRect, m_leftMoreRect;	// 更加靠边四个方位矩形（紧挨着四个方位矩形）
	QRect m_topMostRect, m_rightMostRect, m_bottomMostRect, m_leftMostRect;	// 最靠边四个方向矩形（紧挨着主窗口四边）
	QPixmap m_centerPixmap;
	QPixmap m_topPixmap, m_rightPixmap, m_bottomPixmap, m_leftPixmap;
	QPixmap m_topMostPixmap, m_rightMostPixmap, m_bottomMostPixmap, m_leftMostPixmap;
	QPixmap m_centerPixmapHover;
	QPixmap m_topPixmapHover, m_rightPixmapHover, m_bottomPixmapHover, m_leftPixmapHover;
	QPixmap m_topMostPixmapHover, m_rightMostPixmapHover, m_bottomMostPixmapHover, m_leftMostPixmapHover;
};

TestVSWindow::TestVSWindow(QWidget *parent)
    : QMainWindow(parent)
{
    ui.setupUi(this);
	QWHTabWidgetMask::getInstance()->setMainWindow(this);
	
	// 测试左侧停靠窗体
	QWHDockWidget *dockWidget = QWHTabWidgetMask::getInstance()->createDockWidget(QWHDockWidget::Mode_Minor, "总tab");
	QSplitter *splitter = QWHTabWidgetMask::getInstance()->createSplitter();
	splitter->addWidget(dockWidget);
	dockWidget->setFloating(false);
	
	QWidget *widget1 = new QWidget();
	widget1->setMinimumSize(200, 100);
	widget1->setStyleSheet("background-color: green;");
	dockWidget->tabWidget()->addTab(widget1, "第一页");
	QWidget *widget2 = new QWidget();
	widget2->setMinimumSize(200, 100);
	widget2->setStyleSheet("background-color: green;");
	dockWidget->tabWidget()->addTab(widget2, "第二页");
	QWidget *widget3 = new QWidget();
	widget3->setMinimumSize(200, 100);
	widget3->setStyleSheet("background-color: green;");
	dockWidget->tabWidget()->addTab(widget3, "第三页");
	// 测试中间停靠窗体
	QWHDockWidget *dockWidgetCenter = QWHTabWidgetMask::getInstance()->createDockWidget(QWHDockWidget::Mode_Main, "总tabCenter");
	splitter->addWidget(dockWidgetCenter);
	dockWidgetCenter->setFloating(false);
	
	QWidget *widgetCenter1 = new QWidget();
	widgetCenter1->setMinimumSize(200, 100);
	widgetCenter1->setStyleSheet("background-color: rgb(255, 174, 201);");
	dockWidgetCenter->tabWidget()->addTab(widgetCenter1, "第一页Center");
	QWidget *widgetCenter2 = new QWidget();
	widgetCenter2->setMinimumSize(200, 100);
	widgetCenter2->setStyleSheet("background-color: rgb(255, 174, 201);");
	dockWidgetCenter->tabWidget()->addTab(widgetCenter2, "第二页Center");
	QWidget *widgetCenter3 = new QWidget();
	widgetCenter3->setMinimumSize(200, 100);
	widgetCenter3->setStyleSheet("background-color: rgb(255, 174, 201);");
	dockWidgetCenter->tabWidget()->addTab(widgetCenter3, "第三页Center");
	// 测试右侧停靠窗体
	QWHDockWidget *dockWidget2 = QWHTabWidgetMask::getInstance()->createDockWidget(QWHDockWidget::Mode_Minor, "总tab2");
	splitter->addWidget(dockWidget2);
	dockWidget2->setFloating(false);
	QWidget *widget12 = new QWidget();
	widget12->setMinimumSize(200, 100);
	widget12->setStyleSheet("background-color: gray;");
	dockWidget2->tabWidget()->addTab(widget12, "第一页2");
	QWidget *widget22 = new QWidget();
	widget22->setMinimumSize(200, 100);
	widget22->setStyleSheet("background-color: gray;");
	dockWidget2->tabWidget()->addTab(widget22, "第二页2");
	QWidget *widget32 = new QWidget();
	widget32->setMinimumSize(200, 100);
	widget32->setStyleSheet("background-color: gray;");
	dockWidget2->tabWidget()->addTab(widget32, "第三页2");
	QWHTabWidgetMask::getInstance()->setMainSplitter(splitter);
}