#include "Common.h"

/// <summary>
/// 用于显示Pou界面的鸟瞰图
/// </summary>
class WindowAppPouNavView : public QGraphicsView
{
    Q_OBJECT
public:

    WindowAppPouNavView(QWidget *parent = nullptr);

    // 绑定对应的视图
    void setMainView(QGraphicsView *mainView);
    // 设置透明度
    void setOpacity(qreal opacity, bool animated = true);

public slots:

    // 刷新界面（暂未使用）
    void updateMainViewportRegion();

private:

    void mousePressEvent(QMouseEvent * event) override;
    void mouseMoveEvent(QMouseEvent * event) override;
    void mouseReleaseEvent(QMouseEvent * event) override;

    void wheelEvent(QWheelEvent *event) override;
    void paintEvent(QPaintEvent *event) override;

private:

	// 初始化界面风格
	void initStyle();

private:

    bool                                m_mouseDown = false;
    QPolygon                            m_viewportRegion;
    QGraphicsView *                     m_mainView = nullptr;

	/// <summary>
    /// 用于辅助设定透明渐变效果的类（内部类）
    /// </summary>
	class OpacityHelper : QObject
	{
	public:
		OpacityHelper(QWidget* parent);

		void setOpacity(qreal opacity, bool animated = true);

	protected:

		// 窗体透明效果
		QGraphicsOpacityEffect* m_opacityFx;
		// 透明的动画效果
		QPropertyAnimation* m_opacityAnimation;
	};

	OpacityHelper*                      m_opacityHelper = nullptr;
};