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#ifndef NMVTKVIEWCOMMANDCONTROLLER_H
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#define NMVTKVIEWCOMMANDCONTROLLER_H
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#include "nmRender_global.h"
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#include <QFlags>
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#include <QObject>
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#include <QString>
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class QAction;
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class QMenu;
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class QToolBar;
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class nmWxVTKRenderContainerWidget;
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/**
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* @brief 管理单个渲染容器的通用视图命令。
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*
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* 每个命令只创建一个 QAction，工具栏和右键菜单共享该对象。控制器及其
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* QAction 均由所属容器独占，不保存任何业务状态。
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*/
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class NM_RENDER_EXPORT nmVTKViewCommandController : public QObject
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{
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Q_OBJECT
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public:
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enum ViewCommand
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{
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ViewCommand_ZoomIn = 0x0001,
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ViewCommand_ZoomOut = 0x0002,
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ViewCommand_Fit = 0x0004,
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ViewCommand_Top = 0x0008,
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ViewCommand_Front = 0x0010,
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ViewCommand_Right = 0x0020,
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ViewCommand_Isometric = 0x0040,
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ViewCommand_ResetRotationCenter = 0x0080,
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ViewCommand_SaveImage = 0x0100,
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ViewCommand_CopyImage = 0x0200,
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ViewCommand_Print = 0x0400,
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ViewCommand_PrintPreview = 0x0800
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};
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Q_DECLARE_FLAGS(ViewCommands, ViewCommand)
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/**
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* @param pContainer 非所有权指针，用作命令接收者且必须比本对象存活更久。
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* @param pParent Qt 所有权父对象，通常与 pContainer 为同一对象。
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*/
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explicit nmVTKViewCommandController(
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nmWxVTKRenderContainerWidget* pContainer,
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QObject* pParent = NULL);
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virtual ~nmVTKViewCommandController();
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/** @brief 设置当前视图对外提供的命令集合。 */
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void setCapabilities(ViewCommands eCommands);
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/** @brief 返回当前命令集合。 */
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ViewCommands getCapabilities() const;
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/** @brief 返回长期持有的 QAction；调用方不得删除或修改其父对象。 */
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QAction* getAction(ViewCommand eCommand) const;
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/** @brief 将已启用的导航和复制动作加入工具栏，不创建新 QAction。 */
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void populateToolBar(QToolBar* pToolBar) const;
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/** @brief 按统一顺序构造右键菜单，并同步请求业务层追加扩展动作。 */
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void populateContextMenu(QMenu* pMenu) const;
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/** @brief 就绪状态启用命令，空、错误和加载状态统一禁用命令。 */
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void setViewAvailable(bool bAvailable);
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bool isViewAvailable() const;
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signals:
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/** @brief 在视图命令和打印命令之间同步追加业务 QAction。 */
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void contextMenuAboutToShow(QMenu* pMenu) const;
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private:
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Q_DISABLE_COPY(nmVTKViewCommandController)
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enum { ViewCommandCount = 12 };
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QAction* createAction(ViewCommand eCommand,
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const QString& sText,
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const QString& sIconFile,
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const char* pSlot);
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int actionIndex(ViewCommand eCommand) const;
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bool supports(ViewCommand eCommand) const;
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void updateActionStates();
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nmWxVTKRenderContainerWidget* m_pContainer; ///< 非所有权命令接收者。
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QAction* m_pActions[ViewCommandCount]; ///< 本对象通过 Qt 父子关系拥有。
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ViewCommands m_eCapabilities;
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bool m_bViewAvailable;
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};
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Q_DECLARE_OPERATORS_FOR_FLAGS(nmVTKViewCommandController::ViewCommands)
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#endif // NMVTKVIEWCOMMANDCONTROLLER_H
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