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selection.c
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00001 /* 00002 * PROJECT: PAINT for ReactOS 00003 * LICENSE: LGPL 00004 * FILE: base/applications/paint/selection.c 00005 * PURPOSE: Window procedure of the selection window 00006 * PROGRAMMERS: Benedikt Freisen 00007 */ 00008 00009 /* INCLUDES *********************************************************/ 00010 00011 #include "precomp.h" 00012 00013 /* FUNCTIONS ********************************************************/ 00014 00015 LPCTSTR cursors[9] = { IDC_SIZEALL, IDC_SIZENWSE, IDC_SIZENS, IDC_SIZENESW, 00016 IDC_SIZEWE, IDC_SIZEWE, IDC_SIZENESW, IDC_SIZENS, IDC_SIZENWSE 00017 }; 00018 00019 BOOL moving = FALSE; 00020 int action = 0; 00021 short xPos; 00022 short yPos; 00023 short xFrac; 00024 short yFrac; 00025 00026 int 00027 identifyCorner(short x, short y, short w, short h) 00028 { 00029 if (y < 3) 00030 { 00031 if (x < 3) 00032 return 1; 00033 if ((x < w / 2 + 2) && (x >= w / 2 - 1)) 00034 return 2; 00035 if (x >= w - 3) 00036 return 3; 00037 } 00038 if ((y < h / 2 + 2) && (y >= h / 2 - 1)) 00039 { 00040 if (x < 3) 00041 return 4; 00042 if (x >= w - 3) 00043 return 5; 00044 } 00045 if (y >= h - 3) 00046 { 00047 if (x < 3) 00048 return 6; 00049 if ((x < w / 2 + 2) && (x >= w / 2 - 1)) 00050 return 7; 00051 if (x >= w - 3) 00052 return 8; 00053 } 00054 return 0; 00055 } 00056 00057 LRESULT CALLBACK 00058 SelectionWinProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) 00059 { 00060 switch (message) 00061 { 00062 case WM_PAINT: 00063 { 00064 if (!moving) 00065 { 00066 HDC hDC = GetDC(hwnd); 00067 DefWindowProc(hwnd, message, wParam, lParam); 00068 SelectionFrame(hDC, 1, 1, rectSel_dest[2] * zoom / 1000 + 5, 00069 rectSel_dest[3] * zoom / 1000 + 5); 00070 ReleaseDC(hwnd, hDC); 00071 } 00072 break; 00073 } 00074 case WM_LBUTTONDOWN: 00075 xPos = LOWORD(lParam); 00076 yPos = HIWORD(lParam); 00077 SetCapture(hwnd); 00078 if (action != 0) 00079 SetCursor(LoadCursor(NULL, cursors[action])); 00080 moving = TRUE; 00081 break; 00082 case WM_MOUSEMOVE: 00083 if (moving) 00084 { 00085 TCHAR sizeStr[100]; 00086 int xDelta; 00087 int yDelta; 00088 resetToU1(); 00089 xFrac += (short)LOWORD(lParam) - xPos; 00090 yFrac += (short)HIWORD(lParam) - yPos; 00091 if (zoom < 1000) 00092 { 00093 xDelta = xFrac * 1000 / zoom; 00094 xFrac = 0; 00095 yDelta = yFrac * 1000 / zoom; 00096 yFrac = 0; 00097 } 00098 else 00099 { 00100 xDelta = xFrac * 1000 / zoom; 00101 xFrac -= (xFrac * 1000 / zoom) * zoom / 1000; 00102 yDelta = yFrac * 1000 / zoom; 00103 yFrac -= (yFrac * 1000 / zoom) * zoom / 1000; 00104 } 00105 switch (action) 00106 { 00107 case 0: 00108 rectSel_dest[0] += xDelta; 00109 rectSel_dest[1] += yDelta; 00110 break; 00111 case 1: 00112 rectSel_dest[0] += xDelta; 00113 rectSel_dest[1] += yDelta; 00114 rectSel_dest[2] -= xDelta; 00115 rectSel_dest[3] -= yDelta; 00116 break; 00117 case 2: 00118 rectSel_dest[1] += yDelta; 00119 rectSel_dest[3] -= yDelta; 00120 break; 00121 case 3: 00122 rectSel_dest[2] += xDelta; 00123 rectSel_dest[1] += yDelta; 00124 break; 00125 case 4: 00126 rectSel_dest[0] += xDelta; 00127 rectSel_dest[2] -= xDelta; 00128 break; 00129 case 5: 00130 rectSel_dest[2] += xDelta; 00131 break; 00132 case 6: 00133 rectSel_dest[0] += xDelta; 00134 rectSel_dest[2] -= xDelta; 00135 rectSel_dest[3] += yDelta; 00136 break; 00137 case 7: 00138 rectSel_dest[3] += yDelta; 00139 break; 00140 case 8: 00141 rectSel_dest[2] += xDelta; 00142 rectSel_dest[3] += yDelta; 00143 break; 00144 } 00145 00146 _stprintf(sizeStr, _T("%d x %d"), rectSel_dest[2], rectSel_dest[3]); 00147 SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) sizeStr); 00148 00149 if (action != 0) 00150 StretchBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0, GetDIBWidth(hSelBm), GetDIBHeight(hSelBm), SRCCOPY); 00151 else 00152 if (transpBg == 0) 00153 MaskBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3], 00154 hSelDC, 0, 0, hSelMask, 0, 0, MAKEROP4(SRCCOPY, SRCAND)); 00155 else 00156 { 00157 HBITMAP tempMask; 00158 HBRUSH oldBrush; 00159 HDC tempDC; 00160 tempMask = CreateBitmap(rectSel_dest[2], rectSel_dest[3], 1, 1, NULL); 00161 oldBrush = SelectObject(hSelDC, CreateSolidBrush(bgColor)); 00162 tempDC = CreateCompatibleDC(hSelDC); 00163 SelectObject(tempDC, tempMask); 00164 MaskBlt(tempDC, 0, 0, rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0, hSelMask, 0, 0, 00165 MAKEROP4(NOTSRCCOPY, BLACKNESS)); 00166 DeleteDC(tempDC); 00167 DeleteObject(SelectObject(hSelDC, oldBrush)); 00168 00169 MaskBlt(hDrawingDC, rectSel_dest[0], rectSel_dest[1], rectSel_dest[2], rectSel_dest[3], 00170 hSelDC, 0, 0, tempMask, 0, 0, MAKEROP4(SRCCOPY, SRCAND)); 00171 DeleteObject(tempMask); 00172 } 00173 SendMessage(hImageArea, WM_PAINT, 0, 0); 00174 xPos = LOWORD(lParam); 00175 yPos = HIWORD(lParam); 00176 //SendMessage(hwnd, WM_PAINT, 0, 0); 00177 } 00178 else 00179 { 00180 int w = rectSel_dest[2] * zoom / 1000 + 6; 00181 int h = rectSel_dest[3] * zoom / 1000 + 6; 00182 xPos = LOWORD(lParam); 00183 yPos = HIWORD(lParam); 00184 SendMessage(hStatusBar, SB_SETTEXT, 2, (LPARAM) NULL); 00185 action = identifyCorner(xPos, yPos, w, h); 00186 if (action != 0) 00187 SetCursor(LoadCursor(NULL, cursors[action])); 00188 } 00189 break; 00190 case WM_LBUTTONUP: 00191 if (moving) 00192 { 00193 moving = FALSE; 00194 ReleaseCapture(); 00195 if (action != 0) 00196 { 00197 HDC hTempDC; 00198 HBITMAP hTempBm; 00199 hTempDC = CreateCompatibleDC(hSelDC); 00200 hTempBm = CreateDIBWithProperties(rectSel_dest[2], rectSel_dest[3]); 00201 SelectObject(hTempDC, hTempBm); 00202 SelectObject(hSelDC, hSelBm); 00203 StretchBlt(hTempDC, 0, 0, rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0, 00204 GetDIBWidth(hSelBm), GetDIBHeight(hSelBm), SRCCOPY); 00205 DeleteObject(hSelBm); 00206 hSelBm = hTempBm; 00207 hTempBm = CreateBitmap(rectSel_dest[2], rectSel_dest[3], 1, 1, NULL); 00208 SelectObject(hTempDC, hTempBm); 00209 SelectObject(hSelDC, hSelMask); 00210 StretchBlt(hTempDC, 0, 0, rectSel_dest[2], rectSel_dest[3], hSelDC, 0, 0, 00211 GetDIBWidth(hSelMask), GetDIBHeight(hSelMask), SRCCOPY); 00212 DeleteObject(hSelMask); 00213 hSelMask = hTempBm; 00214 SelectObject(hSelDC, hSelBm); 00215 DeleteDC(hTempDC); 00216 } 00217 placeSelWin(); 00218 ShowWindow(hSelection, SW_HIDE); 00219 ShowWindow(hSelection, SW_SHOW); 00220 } 00221 break; 00222 default: 00223 return DefWindowProc(hwnd, message, wParam, lParam); 00224 } 00225 00226 return 0; 00227 }
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