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 <windows.h>
  12 #include <commctrl.h>
  13 #include <tchar.h>
  14 #include "globalvar.h"
  15 #include "drawing.h"
  16 #include "history.h"
  17 #include "mouse.h"
  18 #include "dib.h"
  19
  20 /* FUNCTIONS ********************************************************/
  21
  22 LPCTSTR cursors[9] = { IDC_SIZEALL, IDC_SIZENWSE, IDC_SIZENS, IDC_SIZENESW,
  23     IDC_SIZEWE, IDC_SIZEWE, IDC_SIZENESW, IDC_SIZENS, IDC_SIZENWSE
  24 };
  25
  26 BOOL moving = FALSE;
  27 int action = 0;
  28 short xPos;
  29 short yPos;
  30 short xFrac;
  31 short yFrac;
  32
  33 int
  34 identifyCorner(short x, short y, short w, short h)
  35 {
  36     if (y < 3)
  37     {
  38         if (x < 3)
  39             return 1;
  40         if ((x < w / 2 + 2) && (x >= w / 2 - 1))
  41             return 2;
  42         if (x >= w - 3)
  43             return 3;
  44     }
  45     if ((y < h / 2 + 2) && (y >= h / 2 - 1))
  46     {
  47         if (x < 3)
  48             return 4;
  49         if (x >= w - 3)
  50             return 5;
  51     }
  52     if (y >= h - 3)
  53     {
  54         if (x < 3)
  55             return 6;
  56         if ((x < w / 2 + 2) && (x >= w / 2 - 1))
  57             return 7;
  58         if (x >= w - 3)
  59             return 8;
  60     }
  61     return 0;
  62 }
  63
  64 LRESULT CALLBACK
  65 SelectionWinProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
  66 {
  67     switch (message)
  68     {
  69         case WM_PAINT:
  70         {
  71             if (!moving)
  72             {
  73                 HDC hDC = GetDC(hwnd);
  74                 DefWindowProc(hwnd, message, wParam, lParam);
  75                 SelectionFrame(hDC, 1, 1, rectSel_dest[2] * zoom / 1000 + 5,
  76                                rectSel_dest[3] * zoom / 1000 + 5);
  77                 ReleaseDC(hwnd, hDC);
  78             }
  79             break;
  80         }
  81         case WM_LBUTTONDOWN:
  82             xPos = LOWORD(lParam);
  83             yPos = HIWORD(lParam);
  84             SetCapture(hwnd);
  85             if (action != 0)
  86                 SetCursor(LoadCursor(NULL, cursors[action]));
  87             moving = TRUE;
  88             break;
  89         case WM_MOUSEMOVE:
  90             if (moving)
  91             {
  92                 TCHAR sizeStr[100];
  93                 int xDelta;
  94                 int yDelta;
  95                 resetToU1();
  96                 xFrac += (short)LOWORD(lParam) - xPos;
  97                 yFrac += (short)HIWORD(lParam) - yPos;
  98                 if (zoom < 1000)
  99                 {
 100                     xDelta = xFrac * 1000 / zoom;
 101                     xFrac = 0;
 102                     yDelta = yFrac * 1000 / zoom;
 103                     yFrac = 0;
 104                 }
 105                 else
 106                 {
 107                     xDelta = xFrac * 1000 / zoom;
 108                     xFrac -= (xFrac * 1000 / zoom) * zoom / 1000;
 109                     yDelta = yFrac * 1000 / zoom;
 110                     yFrac -= (yFrac * 1000 / zoom) * zoom / 1000;
 111                 }
 112                 switch (action)
 113                 {
 114                     case 0:
 115                         rectSel_dest[0] += xDelta;
 116                         rectSel_dest[1] += yDelta;
 117                         break;
 118                     case 1:
 119                         rectSel_dest[0] += xDelta;
 120                         rectSel_dest[1] += yDelta;
 121                         rectSel_dest[2] -= xDelta;
 122                         rectSel_dest[3] -= yDelta;
 123                         break;
 124                     case 2:
 125                         rectSel_dest[1] += yDelta;
 126                         rectSel_dest[3] -= yDelta;
 127                         break;
 128                     case 3:
 129                         rectSel_dest[2] += xDelta;
 130                         rectSel_dest[1] += yDelta;
 131                         break;
 132                     case 4:
 133                         rectSel_dest[0] += xDelta;
 134                         rectSel_dest[2] -= xDelta;
 135                         break;
 136                     case 5:
 137                         rectSel_dest[2] += xDelta;
 138                         break;
 139                     case 6:
 140                         rectSel_dest[0] += xDelta;
 141                         rectSel_dest[2] -= xDelta;
 142                         rectSel_dest[3] += yDelta;
 143                         break;
 144                     case 7:
 145                         rectSel_dest[3] += yDelta;
 146                         break;
 147                     case 8:
 148                         rectSel_dest[2] += xDelta;
 149                         rectSel_dest[3] += yDelta;
 150                         break;
 151                 }
 152
 153                 _stprintf(sizeStr, _T("%d x %d"), rectSel_dest[2], rectSel_dest[3]);
 154                 SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) sizeStr);
 155
 156                 if (action != 0)
 157                     StretchBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0, GetDIBWidth(hSelBm), GetDIBHeight(hSelBm), SRCCOPY);
 158                 else
 159                 if (transpBg == 0)
 160                     MaskBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3],
 161                             hSelDC, 0, 0, hSelMask, 0, 0, MAKEROP4(SRCCOPY, SRCAND));
 162                 else
 163                 {
 164                     HBITMAP tempMask;
 165                     HBRUSH oldBrush;
 166                     HDC tempDC;
 167                     tempMask = CreateBitmap(rectSel_dest[2], rectSel_dest[3], 1, 1, NULL);
 168                     oldBrush = SelectObject(hSelDC, CreateSolidBrush(bgColor));
 169                     tempDC = CreateCompatibleDC(hSelDC);
 170                     SelectObject(tempDC, tempMask);
 171                     MaskBlt(tempDC, 0, 0, rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0, hSelMask, 0, 0,
 172                             MAKEROP4(NOTSRCCOPY, BLACKNESS));
 173                     DeleteDC(tempDC);
 174                     DeleteObject(SelectObject(hSelDC, oldBrush));
 175
 176                     MaskBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3],
 177                             hSelDC, 0, 0, tempMask, 0, 0, MAKEROP4(SRCCOPY, SRCAND));
 178                     DeleteObject(tempMask);
 179                 }
 180                 SendMessage(hImageArea, WM_PAINT, 0, 0);
 181                 xPos = LOWORD(lParam);
 182                 yPos = HIWORD(lParam);
 183                 //SendMessage(hwnd, WM_PAINT, 0, 0);
 184             }
 185             else
 186             {
 187                 int w = rectSel_dest[2] * zoom / 1000 + 6;
 188                 int h = rectSel_dest[3] * zoom / 1000 + 6;
 189                 xPos = LOWORD(lParam);
 190                 yPos = HIWORD(lParam);
 191                 SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) NULL);
 192                 action = identifyCorner(xPos, yPos, w, h);
 193                 if (action != 0)
 194                     SetCursor(LoadCursor(NULL, cursors[action]));
 195             }
 196             break;
 197         case WM_LBUTTONUP:
 198             if (moving)
 199             {
 200                 moving = FALSE;
 201                 ReleaseCapture();
 202                 if (action != 0)
 203                 {
 204                     HDC hTempDC;
 205                     HBITMAP hTempBm;
 206                     hTempDC = CreateCompatibleDC(hSelDC);
 207                     hTempBm = CreateDIBWithProperties(rectSel_dest[2], rectSel_dest[3]);
 208                     SelectObject(hTempDC, hTempBm);
 209                     SelectObject(hSelDC, hSelBm);
 210                     StretchBlt(hTempDC, 0, 0, rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0,
 211                                GetDIBWidth(hSelBm), GetDIBHeight(hSelBm), SRCCOPY);
 212                     DeleteObject(hSelBm);
 213                     hSelBm = hTempBm;
 214                     hTempBm = CreateBitmap(rectSel_dest[2], rectSel_dest[3], 1, 1, NULL);
 215                     SelectObject(hTempDC, hTempBm);
 216                     SelectObject(hSelDC, hSelMask);
 217                     StretchBlt(hTempDC, 0, 0, rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0,
 218                                GetDIBWidth(hSelMask), GetDIBHeight(hSelMask), SRCCOPY);
 219                     DeleteObject(hSelMask);
 220                     hSelMask = hTempBm;
 221                     SelectObject(hSelDC, hSelBm);
 222                     DeleteDC(hTempDC);
 223                 }
 224                 placeSelWin();
 225                 ShowWindow(hSelection, SW_HIDE);
 226                 ShowWindow(hSelection, SW_SHOW);
 227             }
 228             break;
 229         default:
 230             return DefWindowProc(hwnd, message, wParam, lParam);
 231     }
 232
 233     return 0;
 234 }