reactos/base/applications/paint/history.c

   1 /*
   2  * PROJECT:     PAINT for ReactOS
   3  * LICENSE:     LGPL
   4  * FILE:        history.c
   5  * PURPOSE:     Undo and redo functionality
   6  * PROGRAMMERS: Benedikt Freisen
   7  */
   8
   9 /* INCLUDES *********************************************************/
  10
  11 #include <windows.h>
  12 #include "globalvar.h"
  13 #include "dib.h"
  14 #include "definitions.h"
  15
  16 /* FUNCTIONS ********************************************************/
  17
  18 extern void updateCanvasAndScrollbars(void);
  19
  20 void setImgXYRes(int x, int y)
  21 {
  22     if ((imgXRes!=x)||(imgYRes!=y))
  23     {
  24         imgXRes = x;
  25         imgYRes = y;
  26         updateCanvasAndScrollbars();
  27     }
  28 }
  29
  30 void newReversible()
  31 {
  32     DeleteObject(hBms[(currInd+1)%4]);
  33     hBms[(currInd+1)%4] = CopyImage( hBms[currInd], IMAGE_BITMAP, 0, 0, LR_COPYRETURNORG);
  34     currInd = (currInd+1)%4;
  35     if (undoSteps<3) undoSteps++;
  36     redoSteps = 0;
  37     SelectObject(hDrawingDC, hBms[currInd]);
  38     imgXRes = GetDIBWidth(hBms[currInd]);
  39     imgYRes = GetDIBHeight(hBms[currInd]);
  40 }
  41
  42 void undo()
  43 {
  44     if (undoSteps>0)
  45     {
  46         ShowWindow(hSelection, SW_HIDE);
  47         currInd = (currInd+3)%4;
  48         SelectObject(hDrawingDC, hBms[currInd]);
  49         undoSteps--;
  50         if (redoSteps<3) redoSteps++;
  51         setImgXYRes(GetDIBWidth(hBms[currInd]), GetDIBHeight(hBms[currInd]));
  52     }
  53 }
  54
  55 void redo()
  56 {
  57     if (redoSteps>0)
  58     {
  59         ShowWindow(hSelection, SW_HIDE);
  60         currInd = (currInd+1)%4;
  61         SelectObject(hDrawingDC, hBms[currInd]);
  62         redoSteps--;
  63         if (undoSteps<3) undoSteps++;
  64         setImgXYRes(GetDIBWidth(hBms[currInd]), GetDIBHeight(hBms[currInd]));
  65     }
  66 }
  67
  68 void resetToU1()
  69 {
  70     DeleteObject(hBms[currInd]);
  71     hBms[currInd] = CopyImage( hBms[(currInd+3)%4], IMAGE_BITMAP, 0, 0, LR_COPYRETURNORG);
  72     SelectObject(hDrawingDC, hBms[currInd]);
  73     imgXRes = GetDIBWidth(hBms[currInd]);
  74     imgYRes = GetDIBHeight(hBms[currInd]);
  75 }
  76
  77 void clearHistory()
  78 {
  79     undoSteps = 0;
  80     redoSteps = 0;
  81 }
  82
  83 void insertReversible(HBITMAP hbm)
  84 {
  85     DeleteObject(hBms[(currInd+1)%4]);
  86     hBms[(currInd+1)%4] = hbm;
  87     currInd = (currInd+1)%4;
  88     if (undoSteps<3) undoSteps++;
  89     redoSteps = 0;
  90     SelectObject(hDrawingDC, hBms[currInd]);
  91     setImgXYRes(GetDIBWidth(hBms[currInd]), GetDIBHeight(hBms[currInd]));
  92 }
  93
  94 void cropReversible(int x, int y)//FIXME: This function is broken
  95 {
  96     HBITMAP oldBitmap;
  97     HPEN oldPen;
  98     HBRUSH oldBrush;
  99
 100     SelectObject(hDrawingDC, hBms[currInd]);
 101     DeleteObject(hBms[(currInd+1)%4]);
 102     hBms[(currInd+1)%4] = CreateDIBWithProperties(x, y);
 103     currInd = (currInd+1)%4;
 104     if (undoSteps<3) undoSteps++;
 105     redoSteps = 0;
 106
 107     oldBitmap = SelectObject(hSelDC, hBms[currInd]);
 108     oldPen = SelectObject(hSelDC, CreatePen(PS_SOLID, 1, bgColor));
 109     oldBrush = SelectObject(hSelDC, CreateSolidBrush(bgColor));
 110     Rectangle(hSelDC, 0, 0, x, y);
 111     DeleteObject(SelectObject(hSelDC, oldBrush));
 112     DeleteObject(SelectObject(hSelDC, oldPen));
 113     BitBlt(hDrawingDC, 0, 0, imgXRes, imgYRes, hSelDC, 0, 0, SRCCOPY);
 114     SelectObject(hDrawingDC, SelectObject(hSelDC, oldBitmap));
 115
 116     setImgXYRes(x, y);
 117 }