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cbc63d876c
- Stamp the image of the selection when the user clicks on the selection while holding down the Ctrl key. - Draw the image of the selection continuously when the user starts dragging the selection while holding down the Shift key. CORE-19094
54 lines
1.6 KiB
C++
54 lines
1.6 KiB
C++
/*
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* PROJECT: PAINT for ReactOS
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* LICENSE: LGPL-2.0-or-later (https://spdx.org/licenses/LGPL-2.0-or-later)
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* PURPOSE: Undo and redo functionality
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* COPYRIGHT: Copyright 2015 Benedikt Freisen <b.freisen@gmx.net>
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*/
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#pragma once
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/* HISTORYSIZE = number of possible undo-steps + 1 */
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#define HISTORYSIZE 11
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class ImageModel
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{
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public:
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ImageModel();
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virtual ~ImageModel();
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HDC GetDC();
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BOOL CanUndo() const { return m_undoSteps > 0; }
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BOOL CanRedo() const { return m_redoSteps > 0; }
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void PushImageForUndo(HBITMAP hbm = NULL);
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void ResetToPrevious(void);
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void Undo(BOOL bClearRedo = FALSE);
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void Redo(void);
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void ClearHistory(void);
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void Crop(int nWidth, int nHeight, int nOffsetX = 0, int nOffsetY = 0);
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void SaveImage(LPCTSTR lpFileName);
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BOOL IsImageSaved() const;
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void StretchSkew(int nStretchPercentX, int nStretchPercentY, int nSkewDegX = 0, int nSkewDegY = 0);
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int GetWidth() const;
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int GetHeight() const;
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HBITMAP CopyBitmap();
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HBITMAP LockBitmap();
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void UnlockBitmap(HBITMAP hbmLocked);
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void InvertColors();
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void FlipHorizontally();
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void FlipVertically();
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void RotateNTimes90Degrees(int iN);
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void Clamp(POINT& pt) const;
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void NotifyImageChanged();
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BOOL IsBlackAndWhite();
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void PushBlackAndWhite();
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void SelectionClone(BOOL bUndoable = TRUE);
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protected:
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HDC m_hDrawingDC; // The device context for this class
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int m_currInd; // The current index in m_hBms
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int m_undoSteps; // The undo-able count
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int m_redoSteps; // The redo-able count
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HBITMAP m_hBms[HISTORYSIZE]; // A rotation buffer of HBITMAPs
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HGDIOBJ m_hbmOld;
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};
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