base/applications/mspaint/selection.c

   1 /*
   2  * PROJECT:     PAINT for ReactOS
   3  * LICENSE:     LGPL
   4  * FILE:        base/applications/paint/selection.c
   5  * PURPOSE:     Window procedure of the selection window
   6  * PROGRAMMERS: Benedikt Freisen
   7  */
   8
   9 /* INCLUDES *********************************************************/
  10
  11 #include "precomp.h"
  12
  13 /* FUNCTIONS ********************************************************/
  14
  15 LPCTSTR cursors[9] = { IDC_SIZEALL, IDC_SIZENWSE, IDC_SIZENS, IDC_SIZENESW,
  16     IDC_SIZEWE, IDC_SIZEWE, IDC_SIZENESW, IDC_SIZENS, IDC_SIZENWSE
  17 };
  18
  19 BOOL moving = FALSE;
  20 int action = 0;
  21 short xPos;
  22 short yPos;
  23 short xFrac;
  24 short yFrac;
  25
  26 int
  27 identifyCorner(short x, short y, short w, short h)
  28 {
  29     if (y < 3)
  30     {
  31         if (x < 3)
  32             return 1;
  33         if ((x < w / 2 + 2) && (x >= w / 2 - 1))
  34             return 2;
  35         if (x >= w - 3)
  36             return 3;
  37     }
  38     if ((y < h / 2 + 2) && (y >= h / 2 - 1))
  39     {
  40         if (x < 3)
  41             return 4;
  42         if (x >= w - 3)
  43             return 5;
  44     }
  45     if (y >= h - 3)
  46     {
  47         if (x < 3)
  48             return 6;
  49         if ((x < w / 2 + 2) && (x >= w / 2 - 1))
  50             return 7;
  51         if (x >= w - 3)
  52             return 8;
  53     }
  54     return 0;
  55 }
  56
  57 LRESULT CALLBACK
  58 SelectionWinProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
  59 {
  60     switch (message)
  61     {
  62         case WM_PAINT:
  63         {
  64             if (!moving)
  65             {
  66                 HDC hDC = GetDC(hwnd);
  67                 DefWindowProc(hwnd, message, wParam, lParam);
  68                 SelectionFrame(hDC, 1, 1, rectSel_dest[2] * zoom / 1000 + 5,
  69                                rectSel_dest[3] * zoom / 1000 + 5);
  70                 ReleaseDC(hwnd, hDC);
  71             }
  72             break;
  73         }
  74         case WM_LBUTTONDOWN:
  75             xPos = LOWORD(lParam);
  76             yPos = HIWORD(lParam);
  77             SetCapture(hwnd);
  78             if (action != 0)
  79                 SetCursor(LoadCursor(NULL, cursors[action]));
  80             moving = TRUE;
  81             break;
  82         case WM_MOUSEMOVE:
  83             if (moving)
  84             {
  85                 TCHAR sizeStr[100];
  86                 int xDelta;
  87                 int yDelta;
  88                 resetToU1();
  89                 xFrac += (short)LOWORD(lParam) - xPos;
  90                 yFrac += (short)HIWORD(lParam) - yPos;
  91                 if (zoom < 1000)
  92                 {
  93                     xDelta = xFrac * 1000 / zoom;
  94                     xFrac = 0;
  95                     yDelta = yFrac * 1000 / zoom;
  96                     yFrac = 0;
  97                 }
  98                 else
  99                 {
 100                     xDelta = xFrac * 1000 / zoom;
 101                     xFrac -= (xFrac * 1000 / zoom) * zoom / 1000;
 102                     yDelta = yFrac * 1000 / zoom;
 103                     yFrac -= (yFrac * 1000 / zoom) * zoom / 1000;
 104                 }
 105                 switch (action)
 106                 {
 107                     case 0:
 108                         rectSel_dest[0] += xDelta;
 109                         rectSel_dest[1] += yDelta;
 110                         break;
 111                     case 1:
 112                         rectSel_dest[0] += xDelta;
 113                         rectSel_dest[1] += yDelta;
 114                         rectSel_dest[2] -= xDelta;
 115                         rectSel_dest[3] -= yDelta;
 116                         break;
 117                     case 2:
 118                         rectSel_dest[1] += yDelta;
 119                         rectSel_dest[3] -= yDelta;
 120                         break;
 121                     case 3:
 122                         rectSel_dest[2] += xDelta;
 123                         rectSel_dest[1] += yDelta;
 124                         break;
 125                     case 4:
 126                         rectSel_dest[0] += xDelta;
 127                         rectSel_dest[2] -= xDelta;
 128                         break;
 129                     case 5:
 130                         rectSel_dest[2] += xDelta;
 131                         break;
 132                     case 6:
 133                         rectSel_dest[0] += xDelta;
 134                         rectSel_dest[2] -= xDelta;
 135                         rectSel_dest[3] += yDelta;
 136                         break;
 137                     case 7:
 138                         rectSel_dest[3] += yDelta;
 139                         break;
 140                     case 8:
 141                         rectSel_dest[2] += xDelta;
 142                         rectSel_dest[3] += yDelta;
 143                         break;
 144                 }
 145
 146                 _stprintf(sizeStr, _T("%d x %d"), rectSel_dest[2], rectSel_dest[3]);
 147                 SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) sizeStr);
 148
 149                 if (action != 0)
 150                     StretchBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0, GetDIBWidth(hSelBm), GetDIBHeight(hSelBm), SRCCOPY);
 151                 else
 152                 if (transpBg == 0)
 153                     MaskBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3],
 154                             hSelDC, 0, 0, hSelMask, 0, 0, MAKEROP4(SRCCOPY, SRCAND));
 155                 else
 156                 {
 157                     HBITMAP tempMask;
 158                     HBRUSH oldBrush;
 159                     HDC tempDC;
 160                     tempMask = CreateBitmap(rectSel_dest[2], rectSel_dest[3], 1, 1, NULL);
 161                     oldBrush = SelectObject(hSelDC, CreateSolidBrush(bgColor));
 162                     tempDC = CreateCompatibleDC(hSelDC);
 163                     SelectObject(tempDC, tempMask);
 164                     MaskBlt(tempDC, 0, 0, rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0, hSelMask, 0, 0,
 165                             MAKEROP4(NOTSRCCOPY, BLACKNESS));
 166                     DeleteDC(tempDC);
 167                     DeleteObject(SelectObject(hSelDC, oldBrush));
 168
 169                     MaskBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3],
 170                             hSelDC, 0, 0, tempMask, 0, 0, MAKEROP4(SRCCOPY, SRCAND));
 171                     DeleteObject(tempMask);
 172                 }
 173                 SendMessage(hImageArea, WM_PAINT, 0, 0);
 174                 xPos = LOWORD(lParam);
 175                 yPos = HIWORD(lParam);
 176                 //SendMessage(hwnd, WM_PAINT, 0, 0);
 177             }
 178             else
 179             {
 180                 int w = rectSel_dest[2] * zoom / 1000 + 6;
 181                 int h = rectSel_dest[3] * zoom / 1000 + 6;
 182                 xPos = LOWORD(lParam);
 183                 yPos = HIWORD(lParam);
 184                 SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) NULL);
 185                 action = identifyCorner(xPos, yPos, w, h);
 186                 if (action != 0)
 187                     SetCursor(LoadCursor(NULL, cursors[action]));
 188             }
 189             break;
 190         case WM_LBUTTONUP:
 191             if (moving)
 192             {
 193                 moving = FALSE;
 194                 ReleaseCapture();
 195                 if (action != 0)
 196                 {
 197                     HDC hTempDC;
 198                     HBITMAP hTempBm;
 199                     hTempDC = CreateCompatibleDC(hSelDC);
 200                     hTempBm = CreateDIBWithProperties(rectSel_dest[2], rectSel_dest[3]);
 201                     SelectObject(hTempDC, hTempBm);
 202                     SelectObject(hSelDC, hSelBm);
 203                     StretchBlt(hTempDC, 0, 0, rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0,
 204                                GetDIBWidth(hSelBm), GetDIBHeight(hSelBm), SRCCOPY);
 205                     DeleteObject(hSelBm);
 206                     hSelBm = hTempBm;
 207                     hTempBm = CreateBitmap(rectSel_dest[2], rectSel_dest[3], 1, 1, NULL);
 208                     SelectObject(hTempDC, hTempBm);
 209                     SelectObject(hSelDC, hSelMask);
 210                     StretchBlt(hTempDC, 0, 0, rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0,
 211                                GetDIBWidth(hSelMask), GetDIBHeight(hSelMask), SRCCOPY);
 212                     DeleteObject(hSelMask);
 213                     hSelMask = hTempBm;
 214                     SelectObject(hSelDC, hSelBm);
 215                     DeleteDC(hTempDC);
 216                 }
 217                 placeSelWin();
 218                 ShowWindow(hSelection, SW_HIDE);
 219                 ShowWindow(hSelection, SW_SHOW);
 220             }
 221             break;
 222         default:
 223             return DefWindowProc(hwnd, message, wParam, lParam);
 224     }
 225
 226     return 0;
 227 }