77 lines
2.4 KiB
C++
77 lines
2.4 KiB
C++
#ifndef _SELTRACK_H_
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#define _SELTRACK_H_
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// This file defines the class used to handle the selection rectangle
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// complete with resize handles
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BOOL InitSelectionTracking();
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void CleanupSelectionTracking();
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/////////////////////////////////////////////////////////////////////////////
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// CSelectionTracker - simple rectangular tracking rectangle w/resize handles
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class CSelectionTracker
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{
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public:
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// Constructor / Destructor
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CSelectionTracker();
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virtual ~CSelectionTracker();
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BOOL Init(); // You must call Init after construction
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// Style Flags
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enum StyleFlags
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{
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solidLine = 1, dottedLine = 2, hatchedBorder = 4,
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resizeInside = 8, resizeOutside = 16, hatchInside = 32,
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lineSelection = 64
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};
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// Hit-Test codes
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enum TrackerHit
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{
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hitNothing = -1,
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hitTopLeft = 0, hitTopRight = 1, hitBottomRight = 2, hitBottomLeft = 3,
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hitTop = 4, hitRight = 5, hitBottom = 6, hitLeft = 7, hitMiddle = 8
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};
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// Attributes
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UINT m_uStyle; // current state
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CRect m_rect; // current position (always in pixels)
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CSize m_sizeMin; // minimum X and Y size during track operation
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int m_nHandleSize; // size of resize handles (default from WIN.INI)
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// Operations
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void Draw(HDC hdc) const;
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void GetTrueRect(LPRECT lpTrueRect) const;
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BOOL SetCursor(HWND hwnd, LPARAM lParam) const;
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BOOL Track(HWND hwnd, CPoint point, BOOL bAllowInvert = FALSE,
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HWND hwndClipTo = NULL);
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BOOL TrackRubberBand(HWND hwnd, CPoint point, BOOL bAllowInvert = TRUE);
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int HitTest(CPoint point) const;
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int NormalizeHit(int nHandle) const;
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private:
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BOOL _bAllowInvert; // flag passed to Track or TrackRubberBand
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CRect _rectLast;
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CSize _sizeLast;
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CSize _sizeMin;
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BOOL _bErase; // TRUE if _DrawTrackerRect is called for erasing
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BOOL _bFinalErase; // TRUE if _DragTrackerRect called for final erase
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// implementation helpers
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void _DrawTrackerRect(LPCRECT lpRect, HWND hwndClipTo, HDC hdc, HWND hwnd);
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void _AdjustRect(int nHandle, LPRECT lpRect);
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void _OnChangedRect(const CRect& rectOld);
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UINT _GetHandleMask() const;
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int _HitTestHandles(CPoint point) const;
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void _GetHandleRect(int nHandle, CRect* pHandleRect) const;
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void _GetModifyPointers(int nHandle, int** ppx, int** ppy, int* px, int*py);
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int _GetHandleSize(LPCRECT lpRect = NULL) const;
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BOOL _TrackHandle(int nHandle, HWND hwnd, CPoint point, HWND hwndClipTo);
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void _DrawDragRect(HDC hdc, LPCRECT lpRect, SIZE size, LPCRECT lpRectLast, SIZE sizeLast);
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};
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#endif
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