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70 lines
1.8 KiB
C++
70 lines
1.8 KiB
C++
#pragma once
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#include "ZxPolicy.h"
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class IxGridAlign;
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/// 策略：图件控制点
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/// 通常是在图件激活时, 显示一些控制点和辅助线, 拖动控制点可调节图件形状.
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class I_PLOTBASE_EXPORT ZxHandlePolicy : public ZxPolicy
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{
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public:
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ZxHandlePolicy();
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/// 获取指定位置的控制点id.
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/// 即鼠标为于pt处, 调用这个函数可判断鼠标下面是哪个控制点.
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/// @param pt 指定位置.
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/// @param fHandleSize 控制点的参考尺寸, 随着视图的缩放变化.
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/// @return 控制点id, 0表示pt不在控制点上
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virtual int getHandleId(const QPointF& pt, double fHandleSize);
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/// 开始移动控制点
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virtual void onBeginMove(int handle, const QPointF& pt);
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/// 控制点移动
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virtual void onMove(int handle, const QPointF& pt);
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/// 停止移动控制点
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virtual void onEndMove(int handle, const QPointF& pt);
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/// 左键在控制点处按下
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virtual void onLeftDown(int handle, const QPointF& pt);
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// 左键在控制点处抬起
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virtual void onLeftUp(int handle, const QPointF& pt);
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/// 左键单击控制点
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virtual void onLeftClick(int handle, const QPointF& pt);
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/// 左键双击控制点
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virtual void onLeftDoubleClick(int handle, const QPointF& pt);
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/// 获取控制点的光标形状
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virtual QCursor getCursor(int handle);
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virtual void onPaint(QPainter* painter, const ZxPaintParam& param);
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/// 刷新编辑区域, 包括整个图件的区域、控制点和辅助线
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virtual void update();
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/// 返回Policy的边框
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virtual QRectF getBounds() const;
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QPointF calcSnapPos(const QPointF& pt) const;
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protected:
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// virtual void onAddToEdit();
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// virtual void onRemoveFromEdit();
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friend class ZxEdit;
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int m_nActiveHandle;
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IxGridAlign* getSnapGrid() const;
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};
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