174 lines
7.6 KiB
C
174 lines
7.6 KiB
C
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#ifndef __ZOOMWND_H_
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#define __ZOOMWND_H_
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#define ZW_DRAWCOMPLETE (WM_USER+99) // PRIVATE
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#define ZW_BACKDRAWCOMPLETE (WM_USER+100) // PRIVATE
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// messages for the Preview Window
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#define IV_SETIMAGEDATA (WM_USER+101)
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#define IV_SCROLL (WM_USER+102)
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#define IV_SETOPTIONS (WM_USER+104)
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#define IV_ONCHANGENOTIFY (WM_USER+106)
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#define IV_ISAVAILABLE (WM_USER+107)
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typedef struct
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{
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LONG x;
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LONG y;
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LONG cx;
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LONG cy;
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} PTSZ;
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class CPreviewWnd;
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class CZoomWnd : public CWindowImpl<CZoomWnd>
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{
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public:
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enum MODE { MODE_PAN, MODE_ZOOMIN, MODE_ZOOMOUT, MODE_NOACTION };
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// public accessor functions
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void ZoomIn(); // Does a zoom in, handles contraints
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void ZoomOut(); // does a zoom out, handles boundry conditions and constraints
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void ActualSize(); // show image at full size (crop if needed)
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void BestFit(); // show full image in window (scale down if needed)
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BOOL IsBestFit() { return m_fBestFit; }
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void SetImageData(CDecodeTask * pImageData, BOOL bUpdate=TRUE); // used to set an image for display
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HRESULT PrepareImageData(CDecodeTask * pImageData); // Draw an image in the back buffer
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void SetPalette( HPALETTE hpal ); // If in palette mode, set this to the palette to use
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void StatusUpdate( int iStatus ); // used to set m_iStrID to display correct status message
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void Zoom( WPARAM wParam, LPARAM lParam );
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BOOL SetMode( MODE modeNew );
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BOOL ScrollBarsPresent();
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BOOL SetScheduler(IShellTaskScheduler * pTaskScheduler);
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int QueryStatus() { return m_iStrID; }
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// Annotation Functions
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void GetVisibleImageWindowRect(LPRECT prectImage);
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void GetImageFromWindow(LPPOINT ppoint, int cSize);
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void GetWindowFromImage(LPPOINT ppoint, int cSize);
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CAnnotationSet* GetAnnotations() { return &m_Annotations; }
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void CommitAnnotations();
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DWORD GetBackgroundColor();
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CZoomWnd(CPreviewWnd *pPreview);
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~CZoomWnd();
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DECLARE_WND_CLASS( TEXT("ShImgVw:CZoomWnd") );
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protected:
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BEGIN_MSG_MAP(CZoomWnd)
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MESSAGE_HANDLER(WM_CREATE, OnCreate)
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MESSAGE_HANDLER(WM_LBUTTONDOWN, OnMouseDown)
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MESSAGE_HANDLER(WM_MBUTTONDOWN, OnMouseDown)
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MESSAGE_HANDLER(WM_LBUTTONDBLCLK, OnMouseDown)
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MESSAGE_HANDLER(WM_ERASEBKGND, OnEraseBkgnd)
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MESSAGE_HANDLER(WM_LBUTTONUP, OnMouseUp)
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MESSAGE_HANDLER(WM_MBUTTONUP, OnMouseUp)
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MESSAGE_HANDLER(WM_MOUSEMOVE, OnMouseMove)
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MESSAGE_HANDLER(WM_SETCURSOR, OnSetCursor)
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MESSAGE_HANDLER(WM_KEYDOWN, OnKeyDown)
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MESSAGE_HANDLER(WM_KEYUP, OnKeyUp)
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MESSAGE_HANDLER(WM_PAINT, OnPaint)
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MESSAGE_HANDLER(WM_SIZE, OnSize)
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MESSAGE_HANDLER(WM_SETFOCUS, OnSetFocus)
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MESSAGE_HANDLER(WM_HSCROLL, OnScroll)
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MESSAGE_HANDLER(WM_VSCROLL, OnScroll)
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MESSAGE_HANDLER(WM_MOUSEWHEEL, OnWheelTurn)
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MESSAGE_HANDLER(ZW_DRAWCOMPLETE, OnDrawComplete)
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MESSAGE_HANDLER(ZW_BACKDRAWCOMPLETE, OnBackDrawComplete)
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MESSAGE_HANDLER(WM_DESTROY, OnDestroy)
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END_MSG_MAP()
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// message handlers
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LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnEraseBkgnd(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnPaint(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnSize(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnKeyDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnKeyUp(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnMouseMove(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnMouseDown(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnMouseUp(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnSetCursor(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnSetFocus(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnWheelTurn(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnDrawComplete(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnBackDrawComplete(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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LRESULT OnDestroy(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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public:
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// This is lazy. These are used by CPreview so I made them public when they probably shouldn't be.
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LRESULT OnScroll(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
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int m_cxImage; // width of bitmap referenced by m_pImageData
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int m_cyImage; // height of bitmap referenced by m_pImageData
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float m_cxImgPhys; // actual width of the image in inches
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float m_cyImgPhys; // actual height of the image in inches
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int m_cxImgPix; // width of the image in screen pixels
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int m_cyImgPix; // height of the image in screen pixels
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float m_imgDPIx;
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float m_imgDPIy;
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float m_winDPIx;
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float m_winDPIy;
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protected:
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BOOL m_fBestFit; // True if we are in Bets Fit mode
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CDecodeTask * m_pImageData;// Handle to a IShellImageData object with render info
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int m_cxCenter; // point to center on relative to image
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int m_cyCenter; // point to center on relative to image
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int m_cxVScroll; // width of a scroll bar
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int m_cyHScroll; // height of a scroll bar
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int m_cxWindow; // width of our client area + scroll width if scroll bar is visible
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int m_cyWindow; // height of our client area + scroll height if scroll bar is visible
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float m_cxWinPhys; // actual width of the client area in inches
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float m_cyWinPhys; // actual height of the client in inches
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int m_xPosMouse; // used to track mouse movement when dragging the LMB
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int m_yPosMouse; // used to track mouse movement when dragging the LMB
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MODE m_modeDefault; // The zoom or pan mode when the shift key isn't pressed
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PTSZ m_ptszDest; // the point and size of the destination rectangle (window coordinates)
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RECT m_rcCut; // the rectangle of the part of the image that will be visible (image coordinates)
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RECT m_rcBleed; // the rectangle adjusted for pixelation effects (window coordinates)
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BOOL m_fPanning; // true when we are panning (implies left mouse button is down)
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BOOL m_fCtrlDown; // a mode modifier ( zoom <=> pan ), true if Ctrl Key is down
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BOOL m_fShiftDown; // a mode modifier ( zoom in <=> zoom out), true if Shift Key is down
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BOOL m_fTimerReady; // reset each time SetImageData is called, unset when timer is reset after OnDrawComplete
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int m_iStrID; // string to display when no bitmap available
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BOOL m_fFoundBackgroundColor;
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DWORD m_dwBackgroundColor;
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HPALETTE m_hpal;
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CPreviewWnd *m_pPreview; // do not delete this
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CAnnotationSet m_Annotations;
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Buffer * m_pFront;
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Buffer * m_pBack;
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UINT m_iIndex; // Index corresponding to the back buffer.
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IShellTaskScheduler * m_pTaskScheduler;
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// protected methods
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void AdjustRectPlacement(); // applies constraints for centering, ensureinging maximum visibility, etc
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void CalcCut(); // calculates the cut region that will be visible after a zoom
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void CalcCut(PTSZ ptszDest, int cxImage, int cyImage, RECT &rcCut, RECT &rcBleed);
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void GetPTSZForBestFit(int cxImgPix, int cyImgPix, float cxImgPhys, float cyImgPhys, PTSZ &ptszDest);
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void SetScrollBars(); // ensures scroll bar state is correct. Used after window resize or zoom.
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HRESULT PrepareDraw(); // draw the image in the background thread
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void FlushDrawMessages(); // remove any pending draw tasks and messages
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BOOL SwitchBuffers(UINT iIndex);
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void _UpdatePhysicalSize();
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};
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#include "prevwnd.h"
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#endif
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