1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
|
// ResizableLayout.cpp: implementation of the CResizableLayout class.
//
/////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2000-2002 by Paolo Messina
// (http://www.geocities.com/ppescher - ppescher@yahoo.com)
//
// The contents of this file are subject to the Artistic License (the "License").
// You may not use this file except in compliance with the License.
// You may obtain a copy of the License at:
// http://www.opensource.org/licenses/artistic-license.html
//
// If you find this code useful, credits would be nice!
//
/////////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "commctrl.h"
#include "ResizableLayout.h"
#include "ResizableMsgSupport.inl"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
// In August 2002 Platform SDK, some guy at MS thought it was time to
// add the missing symbol BS_TYPEMASK, but forgot its original meaning
// and so now he's telling us not to use that symbol because its
// value is likely to change in the future SDK releases, including all
// the BS_* style bits in the mask, not just the button's type as the
// symbol's name suggests. So now we're forced to use another symbol!
#define _BS_TYPEMASK 0x0000000FL
void CResizableLayout::AddAnchor(HWND hWnd, CSize sizeTypeTL, CSize sizeTypeBR)
{
CWnd* pParent = GetResizableWnd();
// child window must be valid
ASSERT(::IsWindow(hWnd));
// must be child of parent window
// ASSERT(::IsChild(pParent->GetSafeHwnd(), hWnd));
// top-left anchor must be valid
ASSERT(sizeTypeTL != NOANCHOR);
// get control's window class
CString sClassName;
GetClassName(hWnd, sClassName.GetBufferSetLength(MAX_PATH), MAX_PATH);
sClassName.ReleaseBuffer();
// get parent window's rect
CRect rectParent;
GetTotalClientRect(&rectParent);
// and child control's rect
CRect rectChild;
::GetWindowRect(hWnd, &rectChild);
::MapWindowPoints(NULL, pParent->m_hWnd, (LPPOINT)&rectChild, 2);
// adjust position, if client area has been scrolled
rectChild.OffsetRect(-rectParent.TopLeft());
// go calculate margins
CSize sizeMarginTL, sizeMarginBR;
if (sizeTypeBR == NOANCHOR)
sizeTypeBR = sizeTypeTL;
// calculate margin for the top-left corner
sizeMarginTL.cx = rectChild.left - rectParent.Width() * sizeTypeTL.cx / 100;
sizeMarginTL.cy = rectChild.top - rectParent.Height() * sizeTypeTL.cy / 100;
// calculate margin for the bottom-right corner
sizeMarginBR.cx = rectChild.right - rectParent.Width() * sizeTypeBR.cx / 100;
sizeMarginBR.cy = rectChild.bottom - rectParent.Height() * sizeTypeBR.cy / 100;
// prepare the structure
LayoutInfo layout(hWnd, sizeTypeTL, sizeMarginTL,
sizeTypeBR, sizeMarginBR, sClassName);
// initialize resize properties (overridable)
InitResizeProperties(layout);
// must not be already there!
// (this is probably due to a duplicate call to AddAnchor)
POSITION pos;
ASSERT(!m_mapLayout.Lookup(hWnd, pos));
// add to the list and the map
pos = m_listLayout.AddTail(layout);
m_mapLayout.SetAt(hWnd, pos);
}
void CResizableLayout::AddAnchorCallback(UINT nCallbackID)
{
// one callback control cannot rely upon another callback control's
// size and/or position (they're updated all together at the end)
// it can however use a non-callback control, which is updated before
// add to the list
LayoutInfo layout;
layout.nCallbackID = nCallbackID;
m_listLayoutCB.AddTail(layout);
}
BOOL CResizableLayout::ArrangeLayoutCallback(CResizableLayout::LayoutInfo& /*layout*/)
{
ASSERT(FALSE);
// must be overridden, if callback is used
return FALSE; // no output data
}
void CResizableLayout::ArrangeLayout()
{
// common vars
UINT uFlags;
LayoutInfo layout;
CRect rectParent, rectChild;
GetTotalClientRect(&rectParent); // get parent window's rect
int count = m_listLayout.GetCount();
int countCB = m_listLayoutCB.GetCount();
// reposition child windows
HDWP hdwp = ::BeginDeferWindowPos(count + countCB);
POSITION pos = m_listLayout.GetHeadPosition();
while (pos != NULL)
{
// get layout info
layout = m_listLayout.GetNext(pos);
// calculate new child's position, size and flags for SetWindowPos
CalcNewChildPosition(layout, rectParent, rectChild, uFlags);
// only if size or position changed
if ((uFlags & (SWP_NOMOVE|SWP_NOSIZE)) != (SWP_NOMOVE|SWP_NOSIZE))
{
hdwp = ::DeferWindowPos(hdwp, layout.hWnd, NULL, rectChild.left,
rectChild.top, rectChild.Width(), rectChild.Height(), uFlags);
}
}
// for callback items you may use GetAnchorPosition to know the
// new position and size of a non-callback item after resizing
pos = m_listLayoutCB.GetHeadPosition();
while (pos != NULL)
{
// get layout info
layout = m_listLayoutCB.GetNext(pos);
// request layout data
if (!ArrangeLayoutCallback(layout))
continue;
// calculate new child's position, size and flags for SetWindowPos
CalcNewChildPosition(layout, rectParent, rectChild, uFlags);
// only if size or position changed
if ((uFlags & (SWP_NOMOVE|SWP_NOSIZE)) != (SWP_NOMOVE|SWP_NOSIZE))
{
hdwp = ::DeferWindowPos(hdwp, layout.hWnd, NULL, rectChild.left,
rectChild.top, rectChild.Width(), rectChild.Height(), uFlags);
}
}
// finally move all the windows at once
::EndDeferWindowPos(hdwp);
}
void CResizableLayout::ClipChildWindow(const CResizableLayout::LayoutInfo& layout,
CRgn* pRegion)
{
// obtain window position
CRect rect;
::GetWindowRect(layout.hWnd, &rect);
::MapWindowPoints(NULL, GetResizableWnd()->m_hWnd, (LPPOINT)&rect, 2);
// use window region if any
CRgn rgn;
rgn.CreateRectRgn(0,0,0,0);
switch (::GetWindowRgn(layout.hWnd, rgn))
{
case COMPLEXREGION:
case SIMPLEREGION:
rgn.OffsetRgn(rect.TopLeft());
break;
default:
rgn.SetRectRgn(&rect);
}
// get the clipping property
BOOL bClipping = layout.properties.bAskClipping ?
LikesClipping(layout) : layout.properties.bCachedLikesClipping;
// modify region accordingly
if (bClipping)
pRegion->CombineRgn(pRegion, &rgn, RGN_DIFF);
else
pRegion->CombineRgn(pRegion, &rgn, RGN_OR);
}
void CResizableLayout::GetClippingRegion(CRgn* pRegion)
{
CWnd* pWnd = GetResizableWnd();
// System's default clipping area is screen's size,
// not enough for max track size, for example:
// if screen is 1024 x 768 and resizing border is 4 pixels,
// maximized size is 1024+4*2=1032 x 768+4*2=776,
// but max track size is 4 pixels bigger 1036 x 780 (don't ask me why!)
// So, if you resize the window to maximum size, the last 4 pixels
// are clipped out by the default clipping region, that gets created
// as soon as you call clipping functions (my guess).
// reset clipping region to the whole client area
CRect rect;
pWnd->GetClientRect(&rect);
pRegion->CreateRectRgnIndirect(&rect);
// clip only anchored controls
LayoutInfo layout;
POSITION pos = m_listLayout.GetHeadPosition();
while (pos != NULL)
{
// get layout info
layout = m_listLayout.GetNext(pos);
if (::IsWindowVisible(layout.hWnd))
ClipChildWindow(layout, pRegion);
}
pos = m_listLayoutCB.GetHeadPosition();
while (pos != NULL)
{
// get layout info
layout = m_listLayoutCB.GetNext(pos);
// request data
if (!ArrangeLayoutCallback(layout))
continue;
if (::IsWindowVisible(layout.hWnd))
ClipChildWindow(layout, pRegion);
}
// fix for RTL layouts (1 pixel of horz offset)
if (pWnd->GetExStyle() & 0x00400000L/*WS_EX_LAYOUTRTL*/)
pRegion->OffsetRgn(-1,0);
}
void CResizableLayout::EraseBackground(CDC* pDC)
{
HWND hWnd = GetResizableWnd()->GetSafeHwnd();
// retrieve the background brush
HBRUSH hBrush = NULL;
// is this a dialog box?
// (using class atom is quickier than using the class name)
ATOM atomWndClass = (ATOM)::GetClassLong(hWnd, GCW_ATOM);
if (atomWndClass == (ATOM)0x8002)
{
// send a message to the dialog box
hBrush = (HBRUSH)::SendMessage(hWnd, WM_CTLCOLORDLG,
(WPARAM)pDC->GetSafeHdc(), (LPARAM)hWnd);
}
else
{
// take the background brush from the window's class
#ifdef _WIN64
hBrush = (HBRUSH)::GetClassLongPtr(hWnd, GCLP_HBRBACKGROUND);
#else
hBrush = (HBRUSH)::GetClassLongPtr(hWnd, GCL_HBRBACKGROUND);
#endif
}
// fill the clipped background
CRgn rgn;
GetClippingRegion(&rgn);
::FillRgn(pDC->GetSafeHdc(), rgn, hBrush);
}
// support legacy code (will disappear in future versions)
void CResizableLayout::ClipChildren(CDC* pDC)
{
CRgn rgn;
GetClippingRegion(&rgn);
// the clipping region is in device units
rgn.OffsetRgn(-pDC->GetWindowOrg());
pDC->SelectClipRgn(&rgn);
}
void CResizableLayout::GetTotalClientRect(LPRECT lpRect)
{
GetResizableWnd()->GetClientRect(lpRect);
}
BOOL CResizableLayout::NeedsRefresh(const CResizableLayout::LayoutInfo& layout,
const CRect& rectOld, const CRect& rectNew)
{
if (layout.bMsgSupport)
{
REFRESHPROPERTY refresh;
refresh.rcOld = rectOld;
refresh.rcNew = rectNew;
if (Send_NeedsRefresh(layout.hWnd, &refresh))
return refresh.bNeedsRefresh;
}
int nDiffWidth = (rectNew.Width() - rectOld.Width());
int nDiffHeight = (rectNew.Height() - rectOld.Height());
// is the same size?
if (nDiffWidth == 0 && nDiffHeight == 0)
return FALSE;
// optimistic, no need to refresh
BOOL bRefresh = FALSE;
// window classes that need refresh when resized
if (layout.sWndClass == WC_STATIC)
{
DWORD style = ::GetWindowLong(layout.hWnd, GWL_STYLE);
switch (style & SS_TYPEMASK)
{
case SS_LEFT:
case SS_CENTER:
case SS_RIGHT:
// word-wrapped text
bRefresh = bRefresh || (nDiffWidth != 0);
// vertically centered text
if (style & SS_CENTERIMAGE)
bRefresh = bRefresh || (nDiffHeight != 0);
break;
case SS_LEFTNOWORDWRAP:
// text with ellipsis
if (style & SS_ELLIPSISMASK)
bRefresh = bRefresh || (nDiffWidth != 0);
// vertically centered text
if (style & SS_CENTERIMAGE)
bRefresh = bRefresh || (nDiffHeight != 0);
break;
case SS_ENHMETAFILE:
case SS_BITMAP:
case SS_ICON:
// images
case SS_BLACKFRAME:
case SS_GRAYFRAME:
case SS_WHITEFRAME:
case SS_ETCHEDFRAME:
// and frames
bRefresh = TRUE;
break;
}
}
// window classes that don't redraw client area correctly
// when the hor scroll pos changes due to a resizing
BOOL bHScroll = FALSE;
if (layout.sWndClass == WC_LISTBOX)
bHScroll = TRUE;
// fix for horizontally scrollable windows
if (bHScroll && (nDiffWidth > 0))
{
// get max scroll position
SCROLLINFO info;
info.cbSize = sizeof(SCROLLINFO);
info.fMask = SIF_PAGE | SIF_POS | SIF_RANGE;
if (::GetScrollInfo(layout.hWnd, SB_HORZ, &info))
{
// subtract the page size
info.nMax -= __max(info.nPage-1,0);
}
// resizing will cause the text to scroll on the right
// because the scrollbar is going beyond the right limit
if ((info.nMax > 0) && (info.nPos + nDiffWidth > info.nMax))
{
// needs repainting, due to horiz scrolling
bRefresh = TRUE;
}
}
return bRefresh;
}
BOOL CResizableLayout::LikesClipping(const CResizableLayout::LayoutInfo& layout)
{
if (layout.bMsgSupport)
{
CLIPPINGPROPERTY clipping;
if (Send_LikesClipping(layout.hWnd, &clipping))
return clipping.bLikesClipping;
}
DWORD style = ::GetWindowLong(layout.hWnd, GWL_STYLE);
// skip windows that wants background repainted
if (layout.sWndClass == TOOLBARCLASSNAME && (style & TBSTYLE_TRANSPARENT))
return FALSE;
else if (layout.sWndClass == WC_BUTTON)
{
CRect rect;
switch (style & _BS_TYPEMASK)
{
case BS_GROUPBOX:
return FALSE;
case BS_OWNERDRAW:
// ownerdraw buttons must return correct hittest code
// to notify their transparency to the system and this library
::GetWindowRect(layout.hWnd, &rect);
if ( HTTRANSPARENT == ::SendMessage(layout.hWnd,
WM_NCHITTEST, 0, MAKELPARAM(rect.left, rect.top)) )
return FALSE;
break;
}
return TRUE;
}
else if (layout.sWndClass == WC_STATIC)
{
switch (style & SS_TYPEMASK)
{
case SS_LEFT:
case SS_CENTER:
case SS_RIGHT:
case SS_SIMPLE:
case SS_LEFTNOWORDWRAP:
// text
case SS_BLACKRECT:
case SS_GRAYRECT:
case SS_WHITERECT:
// filled rects
case SS_ETCHEDHORZ:
case SS_ETCHEDVERT:
// etched lines
case SS_BITMAP:
// bitmaps
return TRUE;
break;
case SS_ICON:
case SS_ENHMETAFILE:
if (style & SS_CENTERIMAGE)
return FALSE;
return TRUE;
break;
default:
return FALSE;
}
}
// assume the others like clipping
return TRUE;
}
void CResizableLayout::CalcNewChildPosition(const CResizableLayout::LayoutInfo& layout,
const CRect &rectParent, CRect &rectChild, UINT& uFlags)
{
CWnd* pParent = GetResizableWnd();
::GetWindowRect(layout.hWnd, &rectChild);
::MapWindowPoints(NULL, pParent->m_hWnd, (LPPOINT)&rectChild, 2);
CRect rectNew;
// calculate new top-left corner
rectNew.left = layout.sizeMarginTL.cx + rectParent.Width() * layout.sizeTypeTL.cx / 100;
rectNew.top = layout.sizeMarginTL.cy + rectParent.Height() * layout.sizeTypeTL.cy / 100;
// calculate new bottom-right corner
rectNew.right = layout.sizeMarginBR.cx + rectParent.Width() * layout.sizeTypeBR.cx / 100;
rectNew.bottom = layout.sizeMarginBR.cy + rectParent.Height() * layout.sizeTypeBR.cy / 100;
// adjust position, if client area has been scrolled
rectNew.OffsetRect(rectParent.TopLeft());
// get the refresh property
BOOL bRefresh = layout.properties.bAskRefresh ?
NeedsRefresh(layout, rectChild, rectNew) : layout.properties.bCachedNeedsRefresh;
// set flags
uFlags = SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREPOSITION;
if (bRefresh)
uFlags |= SWP_NOCOPYBITS;
if (rectNew.TopLeft() == rectChild.TopLeft())
uFlags |= SWP_NOMOVE;
if (rectNew.Size() == rectChild.Size())
uFlags |= SWP_NOSIZE;
// update rect
rectChild = rectNew;
}
void CResizableLayout::InitResizeProperties(CResizableLayout::LayoutInfo &layout)
{
// check if custom window supports this library
// (properties must be correctly set by the window)
layout.bMsgSupport = Send_QueryProperties(layout.hWnd, &layout.properties);
// default properties
if (!layout.bMsgSupport)
{
// clipping property is assumed as static
layout.properties.bAskClipping = FALSE;
layout.properties.bCachedLikesClipping = LikesClipping(layout);
// refresh property is assumed as dynamic
layout.properties.bAskRefresh = TRUE;
}
}
|