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527f2f9057
* Create a branch for some evul shell experiments. svn path=/branches/shell-experiments/; revision=61927
133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/*
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* PROJECT: PAINT for ReactOS
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* LICENSE: LGPL
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* FILE: base/applications/paint/history.c
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* PURPOSE: Undo and redo functionality
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* PROGRAMMERS: Benedikt Freisen
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*/
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/* INCLUDES *********************************************************/
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#include "precomp.h"
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/* FUNCTIONS ********************************************************/
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extern void updateCanvasAndScrollbars(void);
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void
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setImgXYRes(int x, int y)
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{
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if ((imgXRes != x) || (imgYRes != y))
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{
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imgXRes = x;
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imgYRes = y;
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updateCanvasAndScrollbars();
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}
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}
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void
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newReversible()
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{
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DeleteObject(hBms[(currInd + 1) % HISTORYSIZE]);
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hBms[(currInd + 1) % HISTORYSIZE] = CopyImage(hBms[currInd], IMAGE_BITMAP, 0, 0, LR_COPYRETURNORG);
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currInd = (currInd + 1) % HISTORYSIZE;
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if (undoSteps < HISTORYSIZE - 1)
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undoSteps++;
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redoSteps = 0;
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SelectObject(hDrawingDC, hBms[currInd]);
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imgXRes = GetDIBWidth(hBms[currInd]);
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imgYRes = GetDIBHeight(hBms[currInd]);
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imageSaved = FALSE;
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}
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void
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undo()
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{
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if (undoSteps > 0)
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{
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ShowWindow(hSelection, SW_HIDE);
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currInd = (currInd + HISTORYSIZE - 1) % HISTORYSIZE;
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SelectObject(hDrawingDC, hBms[currInd]);
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undoSteps--;
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if (redoSteps < HISTORYSIZE - 1)
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redoSteps++;
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setImgXYRes(GetDIBWidth(hBms[currInd]), GetDIBHeight(hBms[currInd]));
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}
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}
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void
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redo()
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{
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if (redoSteps > 0)
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{
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ShowWindow(hSelection, SW_HIDE);
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currInd = (currInd + 1) % HISTORYSIZE;
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SelectObject(hDrawingDC, hBms[currInd]);
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redoSteps--;
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if (undoSteps < HISTORYSIZE - 1)
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undoSteps++;
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setImgXYRes(GetDIBWidth(hBms[currInd]), GetDIBHeight(hBms[currInd]));
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}
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}
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void
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resetToU1()
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{
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DeleteObject(hBms[currInd]);
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hBms[currInd] =
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CopyImage(hBms[(currInd + HISTORYSIZE - 1) % HISTORYSIZE], IMAGE_BITMAP, 0, 0, LR_COPYRETURNORG);
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SelectObject(hDrawingDC, hBms[currInd]);
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imgXRes = GetDIBWidth(hBms[currInd]);
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imgYRes = GetDIBHeight(hBms[currInd]);
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}
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void
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clearHistory()
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{
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undoSteps = 0;
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redoSteps = 0;
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}
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void
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insertReversible(HBITMAP hbm)
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{
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DeleteObject(hBms[(currInd + 1) % HISTORYSIZE]);
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hBms[(currInd + 1) % HISTORYSIZE] = hbm;
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currInd = (currInd + 1) % HISTORYSIZE;
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if (undoSteps < HISTORYSIZE - 1)
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undoSteps++;
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redoSteps = 0;
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SelectObject(hDrawingDC, hBms[currInd]);
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setImgXYRes(GetDIBWidth(hBms[currInd]), GetDIBHeight(hBms[currInd]));
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}
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void
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cropReversible(int width, int height, int xOffset, int yOffset)
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{
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HDC hdc;
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HPEN oldPen;
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HBRUSH oldBrush;
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SelectObject(hDrawingDC, hBms[currInd]);
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DeleteObject(hBms[(currInd + 1) % HISTORYSIZE]);
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hBms[(currInd + 1) % HISTORYSIZE] = CreateDIBWithProperties(width, height);
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currInd = (currInd + 1) % HISTORYSIZE;
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if (undoSteps < HISTORYSIZE - 1)
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undoSteps++;
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redoSteps = 0;
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hdc = CreateCompatibleDC(hDrawingDC);
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SelectObject(hdc, hBms[currInd]);
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oldPen = SelectObject(hdc, CreatePen(PS_SOLID, 1, bgColor));
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oldBrush = SelectObject(hdc, CreateSolidBrush(bgColor));
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Rectangle(hdc, 0, 0, width, height);
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BitBlt(hdc, -xOffset, -yOffset, imgXRes, imgYRes, hDrawingDC, 0, 0, SRCCOPY);
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DeleteObject(SelectObject(hdc, oldBrush));
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DeleteObject(SelectObject(hdc, oldPen));
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DeleteDC(hdc);
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SelectObject(hDrawingDC, hBms[currInd]);
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setImgXYRes(width, height);
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}
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