base/applications/paint/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 "globalvar.h"
  13 #include "drawing.h"
  14 #include "history.h"
  15 #include "mouse.h"
  16 #include "dib.h"
  17
  18 /* FUNCTIONS ********************************************************/
  19
  20 LPCTSTR cursors[9] = { IDC_SIZEALL, IDC_SIZENWSE, IDC_SIZENS, IDC_SIZENESW,
  21     IDC_SIZEWE, IDC_SIZEWE, IDC_SIZENESW, IDC_SIZENS, IDC_SIZENWSE
  22 };
  23
  24 BOOL moving = FALSE;
  25 int action = 0;
  26 short xPos;
  27 short yPos;
  28 short xFrac;
  29 short yFrac;
  30
  31 int
  32 identifyCorner(short x, short y, short w, short h)
  33 {
  34     if (y < 3)
  35     {
  36         if (x < 3)
  37             return 1;
  38         if ((x < w / 2 + 2) && (x >= w / 2 - 1))
  39             return 2;
  40         if (x >= w - 3)
  41             return 3;
  42     }
  43     if ((y < h / 2 + 2) && (y >= h / 2 - 1))
  44     {
  45         if (x < 3)
  46             return 4;
  47         if (x >= w - 3)
  48             return 5;
  49     }
  50     if (y >= h - 3)
  51     {
  52         if (x < 3)
  53             return 6;
  54         if ((x < w / 2 + 2) && (x >= w / 2 - 1))
  55             return 7;
  56         if (x >= w - 3)
  57             return 8;
  58     }
  59     return 0;
  60 }
  61
  62 LRESULT CALLBACK
  63 SelectionWinProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
  64 {
  65     switch (message)
  66     {
  67         case WM_PAINT:
  68         {
  69             if (!moving)
  70             {
  71                 HDC hDC = GetDC(hwnd);
  72                 DefWindowProc(hwnd, message, wParam, lParam);
  73                 SelectionFrame(hDC, 1, 1, rectSel_dest[2] * zoom / 1000 + 5,
  74                                rectSel_dest[3] * zoom / 1000 + 5);
  75                 ReleaseDC(hwnd, hDC);
  76             }
  77             break;
  78         }
  79         case WM_LBUTTONDOWN:
  80             xPos = LOWORD(lParam);
  81             yPos = HIWORD(lParam);
  82             SetCapture(hwnd);
  83             if (action != 0)
  84                 SetCursor(LoadCursor(NULL, cursors[action]));
  85             moving = TRUE;
  86             break;
  87         case WM_MOUSEMOVE:
  88             if (moving)
  89             {
  90                 int xDelta;
  91                 int yDelta;
  92                 resetToU1();
  93                 xFrac += (short)LOWORD(lParam) - xPos;
  94                 yFrac += (short)HIWORD(lParam) - yPos;
  95                 if (zoom < 1000)
  96                 {
  97                     xDelta = xFrac * 1000 / zoom;
  98                     xFrac = 0;
  99                     yDelta = yFrac * 1000 / zoom;
 100                     yFrac = 0;
 101                 }
 102                 else
 103                 {
 104                     xDelta = xFrac * 1000 / zoom;
 105                     xFrac -= (xFrac * 1000 / zoom) * zoom / 1000;
 106                     yDelta = yFrac * 1000 / zoom;
 107                     yFrac -= (yFrac * 1000 / zoom) * zoom / 1000;
 108                 }
 109                 switch (action)
 110                 {
 111                     case 0:
 112                         rectSel_dest[0] += xDelta;
 113                         rectSel_dest[1] += yDelta;
 114                         break;
 115                     case 1:
 116                         rectSel_dest[0] += xDelta;
 117                         rectSel_dest[1] += yDelta;
 118                         rectSel_dest[2] -= xDelta;
 119                         rectSel_dest[3] -= yDelta;
 120                         break;
 121                     case 2:
 122                         rectSel_dest[1] += yDelta;
 123                         rectSel_dest[3] -= yDelta;
 124                         break;
 125                     case 3:
 126                         rectSel_dest[2] += xDelta;
 127                         rectSel_dest[1] += yDelta;
 128                         break;
 129                     case 4:
 130                         rectSel_dest[0] += xDelta;
 131                         rectSel_dest[2] -= xDelta;
 132                         break;
 133                     case 5:
 134                         rectSel_dest[2] += xDelta;
 135                         break;
 136                     case 6:
 137                         rectSel_dest[0] += xDelta;
 138                         rectSel_dest[2] -= xDelta;
 139                         rectSel_dest[3] += yDelta;
 140                         break;
 141                     case 7:
 142                         rectSel_dest[3] += yDelta;
 143                         break;
 144                     case 8:
 145                         rectSel_dest[2] += xDelta;
 146                         rectSel_dest[3] += yDelta;
 147                         break;
 148                 }
 149
 150                 if (action != 0)
 151                     StretchBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0, GetDIBWidth(hSelBm), GetDIBHeight(hSelBm), SRCCOPY);
 152                 else
 153                 if (transpBg == 0)
 154                     MaskBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3],
 155                             hSelDC, 0, 0, hSelMask, 0, 0, MAKEROP4(SRCCOPY, SRCAND));
 156                 else
 157                 {
 158                     HBITMAP tempMask;
 159                     HBRUSH oldBrush;
 160                     HDC tempDC;
 161                     tempMask = CreateBitmap(rectSel_dest[2], rectSel_dest[3], 1, 1, NULL);
 162                     oldBrush = SelectObject(hSelDC, CreateSolidBrush(bgColor));
 163                     tempDC = CreateCompatibleDC(hSelDC);
 164                     SelectObject(tempDC, tempMask);
 165                     MaskBlt(tempDC, 0, 0, rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0, hSelMask, 0, 0,
 166                             MAKEROP4(NOTSRCCOPY, BLACKNESS));
 167                     DeleteDC(tempDC);
 168                     DeleteObject(SelectObject(hSelDC, oldBrush));
 169
 170                     MaskBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3],
 171                             hSelDC, 0, 0, tempMask, 0, 0, MAKEROP4(SRCCOPY, SRCAND));
 172                     DeleteObject(tempMask);
 173                 }
 174                 SendMessage(hImageArea, WM_PAINT, 0, 0);
 175                 xPos = LOWORD(lParam);
 176                 yPos = HIWORD(lParam);
 177                 //SendMessage(hwnd, WM_PAINT, 0, 0);
 178             }
 179             else
 180             {
 181                 int w = rectSel_dest[2] * zoom / 1000 + 6;
 182                 int h = rectSel_dest[3] * zoom / 1000 + 6;
 183                 xPos = LOWORD(lParam);
 184                 yPos = HIWORD(lParam);
 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 }