3 * Copyright (C) 1998, 1999, 2000, 2001 ReactOS Team
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * PROJECT: ReactOS user32.dll
22 * FILE: lib/user32/windows/input.c
24 * PROGRAMMER: Casper S. Hornstrup (chorns@users.sourceforge.net)
26 * 09-05-2001 CSH Created
29 /* INCLUDES ******************************************************************/
35 /* FUNCTIONS *****************************************************************/
41 CopyRect(LPRECT lprcDst, CONST RECT *lprcSrc)
43 if(lprcDst == NULL || lprcSrc == NULL)
60 if ((lprc1->left == lprc2->left)
61 && (lprc1->top == lprc2->top)
62 && (lprc1->right == lprc2->right)
63 && (lprc1->bottom == lprc2->bottom))
67 /* TODO: return the correct error code. */
68 SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
77 InflateRect(LPRECT rect, int dx, int dy)
91 IntersectRect(LPRECT lprcDst,
95 if (IsRectEmpty(lprcSrc1) || IsRectEmpty(lprcSrc2) ||
96 lprcSrc1->left >= lprcSrc2->right ||
97 lprcSrc2->left >= lprcSrc1->right ||
98 lprcSrc1->top >= lprcSrc2->bottom ||
99 lprcSrc2->top >= lprcSrc1->bottom)
101 SetRectEmpty(lprcDst);
104 lprcDst->left = max(lprcSrc1->left, lprcSrc2->left);
105 lprcDst->right = min(lprcSrc1->right, lprcSrc2->right);
106 lprcDst->top = max(lprcSrc1->top, lprcSrc2->top);
107 lprcDst->bottom = min(lprcSrc1->bottom, lprcSrc2->bottom);
116 IsRectEmpty(CONST RECT *lprc)
118 return((lprc->left >= lprc->right) || (lprc->top >= lprc->bottom));
126 OffsetRect(LPRECT rect, int dx, int dy)
143 PtInRect(CONST RECT *lprc, POINT pt)
145 return((pt.x >= lprc->left) && (pt.x < lprc->right) &&
146 (pt.y >= lprc->top) && (pt.y < lprc->bottom));
150 SetRect(LPRECT lprc, int xLeft, int yTop, int xRight, int yBottom)
154 lprc->right = xRight;
155 lprc->bottom = yBottom;
164 SetRectEmpty(LPRECT lprc)
166 lprc->left = lprc->right = lprc->top = lprc->bottom = 0;
175 SubtractRect(LPRECT lprcDst, CONST RECT *lprcSrc1, CONST RECT *lprcSrc2)
179 if(lprcDst == NULL || lprcSrc1 == NULL || lprcSrc2 == NULL)
182 CopyRect(lprcDst, lprcSrc1);
184 if(!IntersectRect(&tempRect, lprcSrc1, lprcSrc2))
187 if(lprcDst->top == tempRect.top && lprcDst->bottom == tempRect.bottom)
189 if(lprcDst->left == tempRect.left)
190 lprcDst->left = tempRect.right;
191 else if(lprcDst->right == tempRect.right)
192 lprcDst->right = tempRect.left;
194 else if(lprcDst->left == tempRect.left && lprcDst->right == tempRect.right)
196 if(lprcDst->top == tempRect.top)
197 lprcDst->top = tempRect.bottom;
198 else if(lprcDst->right == tempRect.right)
199 lprcDst->right = tempRect.left;
210 UnionRect(LPRECT lprcDst, CONST RECT *lprcSrc1, CONST RECT *lprcSrc2)
212 if (IsRectEmpty(lprcSrc1))
214 if (IsRectEmpty(lprcSrc2))
216 SetRectEmpty(lprcDst);
221 *lprcDst = *lprcSrc2;
226 if (IsRectEmpty(lprcSrc2))
228 *lprcDst = *lprcSrc1;
232 lprcDst->left = min(lprcSrc1->left, lprcSrc2->left);
233 lprcDst->top = min(lprcSrc1->top, lprcSrc2->top);
234 lprcDst->right = max(lprcSrc1->right, lprcSrc2->right);
235 lprcDst->bottom = max(lprcSrc1->bottom, lprcSrc2->bottom);