2 * Scroll windows and DCs
4 * Copyright David W. Metcalfe, 1993
5 * Alex Korobka 1995,1996
18 #include "sysmetrics.h"
21 /*************************************************************************
22 * ScrollWindow16 (USER.61)
24 void WINAPI ScrollWindow16(HWND16 hwnd, INT16 dx, INT16 dy, const RECT16 *rect,
25 const RECT16 *clipRect )
27 RECT32 rect32, clipRect32;
29 if (rect) CONV_RECT16TO32( rect, &rect32 );
30 if (clipRect) CONV_RECT16TO32( clipRect, &clipRect32 );
31 ScrollWindow32( hwnd, dx, dy, rect ? &rect32 : NULL,
32 clipRect ? &clipRect32 : NULL );
35 /*************************************************************************
36 * ScrollWindow32 (USER32.450)
38 * FIXME: verify clipping region calculations
40 BOOL32 WINAPI ScrollWindow32( HWND32 hwnd, INT32 dx, INT32 dy,
41 const RECT32 *rect, const RECT32 *clipRect )
44 HRGN32 hrgnUpdate,hrgnClip;
46 HWND32 hCaretWnd = CARET_GetHwnd();
47 WND* wndScroll = WIN_FindWndPtr( hwnd );
49 TRACE(scroll,"hwnd=%04x, dx=%d, dy=%d, lpRect =%p clipRect=%i,%i,%i,%i\n",
51 clipRect ? clipRect->left : 0,
52 clipRect ? clipRect->top : 0,
53 clipRect ? clipRect->right : 0,
54 clipRect ? clipRect->bottom : 0 );
56 if ( !wndScroll || !WIN_IsWindowDrawable( wndScroll, TRUE ) ) return TRUE;
58 if ( !rect ) /* do not clip children */
60 GetClientRect32(hwnd, &rc);
61 hrgnClip = CreateRectRgnIndirect32( &rc );
63 if ((hCaretWnd == hwnd) || IsChild32(hwnd,hCaretWnd))
64 HideCaret32(hCaretWnd);
67 hdc = GetDCEx32(hwnd, hrgnClip, DCX_CACHE | DCX_CLIPSIBLINGS);
68 DeleteObject32( hrgnClip );
70 else /* clip children */
72 CopyRect32(&rc, rect);
74 if (hCaretWnd == hwnd) HideCaret32(hCaretWnd);
77 hdc = GetDCEx32( hwnd, 0, DCX_CACHE | DCX_USESTYLE );
81 GetClientRect32(hwnd, &cliprc);
83 CopyRect32(&cliprc, clipRect);
85 hrgnUpdate = CreateRectRgn32( 0, 0, 0, 0 );
86 ScrollDC32( hdc, dx, dy, &rc, &cliprc, hrgnUpdate, NULL );
87 ReleaseDC32(hwnd, hdc);
89 if( !rect ) /* move child windows and update region */
93 if( wndScroll->hrgnUpdate > 1 )
94 OffsetRgn32( wndScroll->hrgnUpdate, dx, dy );
96 for (wndPtr = wndScroll->child; wndPtr; wndPtr = wndPtr->next)
97 SetWindowPos32(wndPtr->hwndSelf, 0, wndPtr->rectWindow.left + dx,
98 wndPtr->rectWindow.top + dy, 0,0, SWP_NOZORDER |
99 SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOREDRAW |
103 PAINT_RedrawWindow( hwnd, NULL, hrgnUpdate, RDW_ALLCHILDREN |
104 RDW_INVALIDATE | RDW_ERASE | RDW_ERASENOW, RDW_C_USEHRGN );
106 DeleteObject32( hrgnUpdate );
111 pt.x += dx; pt.y += dy;
112 SetCaretPos32(pt.x, pt.y);
113 ShowCaret32(hCaretWnd);
119 /*************************************************************************
120 * ScrollDC16 (USER.221)
122 BOOL16 WINAPI ScrollDC16( HDC16 hdc, INT16 dx, INT16 dy, const RECT16 *rect,
123 const RECT16 *cliprc, HRGN16 hrgnUpdate,
126 RECT32 rect32, clipRect32, rcUpdate32;
129 if (rect) CONV_RECT16TO32( rect, &rect32 );
130 if (cliprc) CONV_RECT16TO32( cliprc, &clipRect32 );
131 ret = ScrollDC32( hdc, dx, dy, rect ? &rect32 : NULL,
132 cliprc ? &clipRect32 : NULL, hrgnUpdate, &rcUpdate32 );
133 if (rcUpdate) CONV_RECT32TO16( &rcUpdate32, rcUpdate );
138 /*************************************************************************
139 * ScrollDC32 (USER32.449)
141 * Both 'rc' and 'prLClip' are in logical units but update info is
142 * returned in device coordinates.
144 BOOL32 WINAPI ScrollDC32( HDC32 hdc, INT32 dx, INT32 dy, const RECT32 *rc,
145 const RECT32 *prLClip, HRGN32 hrgnUpdate,
151 DC *dc = (DC *)GDI_GetObjPtr(hdc, DC_MAGIC);
153 TRACE(scroll,"%04x %d,%d hrgnUpdate=%04x rcUpdate = %p cliprc = (%d,%d-%d,%d), rc=(%d,%d-%d,%d)\n",
154 (HDC16)hdc, dx, dy, hrgnUpdate, rcUpdate,
155 prLClip ? prLClip->left : 0, prLClip ? prLClip->top : 0, prLClip ? prLClip->right : 0, prLClip ? prLClip->bottom : 0,
156 rc ? rc->left : 0, rc ? rc->top : 0, rc ? rc->right : 0, rc ? rc->bottom : 0 );
158 if ( !dc || !hdc ) return FALSE;
161 TRACE(scroll,"\t[wndOrgX=%i, wndExtX=%i, vportOrgX=%i, vportExtX=%i]\n",
162 dc->wndOrgX, dc->wndExtX, dc->vportOrgX, dc->vportExtX );
163 TRACE(scroll,"\t[wndOrgY=%i, wndExtY=%i, vportOrgY=%i, vportExtY=%i]\n",
164 dc->wndOrgY, dc->wndExtY, dc->vportOrgY, dc->vportExtY );
167 /* compute device clipping region */
171 else /* maybe we should just return FALSE? */
172 GetClipBox32( hdc, &rClip );
175 IntersectRect32(&rClip,&rClip,prLClip);
177 if( rClip.left >= rClip.right || rClip.top >= rClip.bottom )
179 GDI_HEAP_UNLOCK( hdc );
184 IntersectVisRect( hdc, rClip.left, rClip.top,
185 rClip.right, rClip.bottom );
188 /* translate coordinates */
190 ldx = dx * dc->wndExtX / dc->vportExtX;
191 ldy = dy * dc->wndExtY / dc->vportExtY;
194 dest.x = (src.x = rClip.left) + ldx;
196 src.x = (dest.x = rClip.left) - ldx;
199 dest.y = (src.y = rClip.top) + ldy;
201 src.y = (dest.y = rClip.top) - ldy;
205 if( rClip.right - rClip.left > ldx &&
206 rClip.bottom - rClip.top > ldy )
208 ldx = rClip.right - rClip.left - ldx;
209 ldy = rClip.bottom - rClip.top - ldy;
211 if (!BitBlt32( hdc, dest.x, dest.y, ldx, ldy,
212 hdc, src.x, src.y, SRCCOPY))
214 GDI_HEAP_UNLOCK( hdc );
219 /* restore clipping region */
221 RestoreVisRgn( hdc );
224 /* compute update areas */
226 if ( (hrgnUpdate || rcUpdate) && dc->w.hVisRgn )
228 HRGN32 hrgn = (hrgnUpdate) ? hrgnUpdate : CreateRectRgn32( 0,0,0,0 );
231 LPtoDP32( hdc, (LPPOINT32)&rClip, 2 );
232 OffsetRect32( &rClip, dc->w.DCOrgX, dc->w.DCOrgY );
233 hrgnClip = CreateRectRgnIndirect32( &rClip );
235 CombineRgn32( hrgn, dc->w.hVisRgn, hrgnClip, RGN_AND );
236 OffsetRgn32( hrgn, dx, dy );
237 CombineRgn32( hrgn, dc->w.hVisRgn, hrgn, RGN_DIFF );
238 CombineRgn32( hrgn, hrgn, hrgnClip, RGN_AND );
239 OffsetRgn32( hrgn, -dc->w.DCOrgX, -dc->w.DCOrgY );
241 if( rcUpdate ) GetRgnBox32( hrgnUpdate, rcUpdate );
243 if (!hrgnUpdate) DeleteObject32( hrgn );
244 DeleteObject32( hrgnClip );
247 GDI_HEAP_UNLOCK( hdc );
252 /*************************************************************************
253 * ScrollWindowEx16 (USER.319)
255 INT16 WINAPI ScrollWindowEx16( HWND16 hwnd, INT16 dx, INT16 dy,
256 const RECT16 *rect, const RECT16 *clipRect,
257 HRGN16 hrgnUpdate, LPRECT16 rcUpdate,
260 RECT32 rect32, clipRect32, rcUpdate32;
263 if (rect) CONV_RECT16TO32( rect, &rect32 );
264 if (clipRect) CONV_RECT16TO32( clipRect, &clipRect32 );
265 ret = ScrollWindowEx32( hwnd, dx, dy, rect ? &rect32 : NULL,
266 clipRect ? &clipRect32 : NULL, hrgnUpdate,
267 (rcUpdate) ? &rcUpdate32 : NULL, flags );
268 if (rcUpdate) CONV_RECT32TO16( &rcUpdate32, rcUpdate );
272 /*************************************************************************
275 static BOOL32 SCROLL_FixCaret(HWND32 hWnd, LPRECT32 lprc, UINT32 flags)
277 HWND32 hCaret = CARET_GetHwnd();
282 CARET_GetRect( &rc );
283 if( hCaret == hWnd ||
284 (flags & SW_SCROLLCHILDREN && IsChild32(hWnd, hCaret)) )
288 pt.x = rc.left; pt.y = rc.top;
289 MapWindowPoints32( hCaret, hWnd, (LPPOINT32)&rc, 2 );
290 if( IntersectRect32(lprc, lprc, &rc) )
293 lprc->left = pt.x; lprc->top = pt.y;
301 /*************************************************************************
302 * ScrollWindowEx32 (USER32.451)
304 * NOTE: Use this function instead of ScrollWindow32
306 INT32 WINAPI ScrollWindowEx32( HWND32 hwnd, INT32 dx, INT32 dy,
307 const RECT32 *rect, const RECT32 *clipRect,
308 HRGN32 hrgnUpdate, LPRECT32 rcUpdate,
311 INT32 retVal = NULLREGION;
312 BOOL32 bCaret = FALSE, bOwnRgn = TRUE;
314 WND* wnd = WIN_FindWndPtr( hwnd );
316 if( !wnd || !WIN_IsWindowDrawable( wnd, TRUE )) return ERROR;
318 if (rect == NULL) GetClientRect32(hwnd, &rc);
321 if (clipRect) IntersectRect32(&cliprc,&rc,clipRect);
324 if (!IsRectEmpty32(&cliprc) && (dx || dy))
328 BOOL32 bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE));
329 HRGN32 hrgnClip = CreateRectRgnIndirect32(&cliprc);
331 TRACE(scroll,"%04x, %d,%d hrgnUpdate=%04x rcUpdate = %p \
332 cliprc = (%d,%d-%d,%d), rc=(%d,%d-%d,%d) %04x\n",
333 (HWND16)hwnd, dx, dy, hrgnUpdate, rcUpdate,
334 clipRect?clipRect->left:0, clipRect?clipRect->top:0, clipRect?clipRect->right:0, clipRect?clipRect->bottom:0,
335 rect?rect->left:0, rect?rect->top:0, rect ?rect->right:0, rect ?rect->bottom:0, (UINT16)flags );
338 bCaret = SCROLL_FixCaret(hwnd, &rc, flags);
340 if( hrgnUpdate ) bOwnRgn = FALSE;
341 else if( bUpdate ) hrgnUpdate = CreateRectRgn32( 0, 0, 0, 0 );
343 hDC = GetDCEx32( hwnd, hrgnClip, DCX_CACHE | DCX_USESTYLE |
344 ((flags & SW_SCROLLCHILDREN) ? DCX_NOCLIPCHILDREN : 0) );
345 if( (dc = (DC *)GDI_GetObjPtr(hDC, DC_MAGIC)) )
347 wnd->pDriver->pScrollWindow(wnd,dc,dx,dy,&cliprc,bUpdate);
349 if( dc->w.hVisRgn && bUpdate )
351 OffsetRgn32( hrgnClip, dc->w.DCOrgX, dc->w.DCOrgY );
352 CombineRgn32( hrgnUpdate, dc->w.hVisRgn, hrgnClip, RGN_AND );
353 OffsetRgn32( hrgnUpdate, dx, dy );
354 CombineRgn32( hrgnUpdate, dc->w.hVisRgn, hrgnUpdate, RGN_DIFF );
355 CombineRgn32( hrgnUpdate, hrgnUpdate, hrgnClip, RGN_AND );
356 OffsetRgn32( hrgnUpdate, -dc->w.DCOrgX, -dc->w.DCOrgY );
358 if( rcUpdate ) GetRgnBox32( hrgnUpdate, rcUpdate );
360 ReleaseDC32(hwnd, hDC);
361 GDI_HEAP_UNLOCK( hDC );
364 if( wnd->hrgnUpdate > 1 )
366 if( rect || clipRect )
368 if( (CombineRgn32( hrgnClip, hrgnClip,
369 wnd->hrgnUpdate, RGN_AND ) != NULLREGION) )
371 CombineRgn32( wnd->hrgnUpdate, wnd->hrgnUpdate, hrgnClip, RGN_DIFF );
372 OffsetRgn32( hrgnClip, dx, dy );
373 CombineRgn32( wnd->hrgnUpdate, wnd->hrgnUpdate, hrgnClip, RGN_OR );
377 OffsetRgn32( wnd->hrgnUpdate, dx, dy );
380 if( flags & SW_SCROLLCHILDREN )
384 for( w = wnd->child; w; w = w->next )
386 CONV_RECT16TO32( &w->rectWindow, &r );
387 if( !clipRect || IntersectRect32(&r, &r, &cliprc) )
388 SetWindowPos32(w->hwndSelf, 0, w->rectWindow.left + dx,
389 w->rectWindow.top + dy, 0,0, SWP_NOZORDER |
390 SWP_NOSIZE | SWP_NOACTIVATE | SWP_NOREDRAW |
395 if( flags & (SW_INVALIDATE | SW_ERASE) )
396 PAINT_RedrawWindow( hwnd, NULL, hrgnUpdate, RDW_INVALIDATE | RDW_ERASE |
397 ((flags & SW_ERASE) ? RDW_ERASENOW : 0) | ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0 ), 0 );
401 SetCaretPos32( rc.left + dx, rc.top + dy );
405 if( bOwnRgn && hrgnUpdate ) DeleteObject32( hrgnUpdate );
406 DeleteObject32( hrgnClip );