133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
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/**
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* @file WorkflowGraphicsView.h
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* @brief 工作流场景视口
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* @date 2011-09-13
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*/
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#ifndef PAI_FRAME_WORKFLOWWIDGET_WORKFLOWGRAPHICSVIEW_H
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#define PAI_FRAME_WORKFLOWWIDGET_WORKFLOWGRAPHICSVIEW_H
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#include <QGraphicsView>
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class QGraphicsItem;
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namespace pai
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{
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namespace graphics2d
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{
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/**
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* @class WorkflowGraphicsView
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* @brief 工作流编辑的视图区
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*/
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class WorkflowGraphicsView : public QGraphicsView
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{
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Q_OBJECT
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public:
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/**
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* @brief 构造函数
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* @param[in] pScene 场景
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* @param[in] pParent 父亲
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*/
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WorkflowGraphicsView(QGraphicsScene *pScene, QWidget *pParent = NULL);
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/**
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* @brief 析构函数
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*/
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virtual ~WorkflowGraphicsView();
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/**
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* @brief 设置场景是否处于只读状态
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* @param[in] readonly 只读标志
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*/
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void SetScenceReadOnly(bool readonly);
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protected:
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/**
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* @brief 重载菜单相关事件，只读情况下忽略该事件。
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* @param[in] pEvent 菜单事件
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*/
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virtual void contextMenuEvent(QContextMenuEvent *pEvent);
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/**
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* @brief 重载拖放相关事件，只读情况下忽略该事件。
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* @param[in] pEvent 放下事件
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*/
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void dropEvent(QDropEvent *pEvent);
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/**
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* @brief 重载拖放相关事件，只读情况下忽略该事件。
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* @param[in] pEvent 拖拽进入事件
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*/
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void dragEnterEvent(QDragEnterEvent *pEvent);
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/**
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* @brief 重载拖放相关事件，只读情况下忽略该事件。
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* @param[in] pEvent 拖拽离开事件
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*/
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void dragLeaveEvent(QDragLeaveEvent *pEvent);
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/**
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* @brief 重载拖放相关事件，只读情况下忽略该事件。
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* @param[in] pEvent 拖拽移动事件
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*/
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void dragMoveEvent(QDragMoveEvent *pEvent);
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/**
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* @brief 重载按键相关事件，只读情况下忽略该事件。
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* @param[in] pEvent 键盘按压事件
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*/
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void keyPressEvent(QKeyEvent *pEvent);
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/**
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* @brief 重载按键相关事件，只读情况下忽略该事件。
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* @param[in] pEvent 键盘释放事件
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*/
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void keyReleaseEvent(QKeyEvent *pEvent);
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/**
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* @brief 重载按键相关事件，只读情况下忽略该事件。
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* @param[in] pEvent 鼠标按压事件
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*/
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void mousePressEvent(QMouseEvent *pEvent);
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/**
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* @brief 重载按键相关事件，只读情况下忽略该事件。
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* @param[in] pEvent 鼠标释放事件
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*/
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void mouseReleaseEvent(QMouseEvent *pEvent);
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/**
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* @brief 重载按键相关事件，只读情况下忽略该事件。
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* @param[in] pEvent 键盘移动事件
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*/
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void mouseMoveEvent(QMouseEvent *pEvent);
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/**
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* @brief 焦点移入相关事件。
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* @param[in] pEvent 焦点进入事件
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*/
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void focusInEvent(QFocusEvent *pEvent);
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private:
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/**
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* @brief 计算自适应的场景布大小
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* @return 合适的大小
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*/
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QRectF CalculateAdaptiveSceneRect();
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private slots:
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/**
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* @brief 使得Item居中显示
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* @param[in] pItem 居中的item
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*/
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void slotItemNeedCenterOn(QGraphicsItem *pItem);
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private:
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bool m_SceneReadOnly; ///< 配置场景是否只读
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QGraphicsItem *m_pEnsureVisibleItem; ///< 暂存确保可见的item
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};
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}
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}
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#endif ///< PAI_FRAME_WORKFLOWWIDGET_WORKFLOWGRAPHICSVIEW_H
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