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[wxWidgets.git] / src / generic / laywin.cpp
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a6d70308 1/////////////////////////////////////////////////////////////////////////////
80fdcdb9 2// Name: src/generic/laywin.cpp
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3// Purpose: Implements a simple layout algorithm, plus
4// wxSashLayoutWindow which is an example of a window with
5// layout-awareness (via event handlers). This is suited to
6// IDE-style window layout.
7// Author: Julian Smart
8// Modified by:
9// Created: 04/01/98
a6d70308 10// Copyright: (c) Julian Smart
65571936 11// Licence: wxWindows licence
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12/////////////////////////////////////////////////////////////////////////////
13
14// For compilers that support precompilation, includes "wx/wx.h".
15#include "wx/wxprec.h"
16
17#ifdef __BORLANDC__
18#pragma hdrstop
19#endif
20
21#ifndef WX_PRECOMP
04dbb646 22 #include "wx/frame.h"
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23#endif
24
25#include "wx/laywin.h"
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26#include "wx/mdi.h"
27
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28
29IMPLEMENT_DYNAMIC_CLASS(wxQueryLayoutInfoEvent, wxEvent)
30IMPLEMENT_DYNAMIC_CLASS(wxCalculateLayoutEvent, wxEvent)
31
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32wxDEFINE_EVENT( wxEVT_QUERY_LAYOUT_INFO, wxQueryLayoutInfoEvent );
33wxDEFINE_EVENT( wxEVT_CALCULATE_LAYOUT, wxCalculateLayoutEvent );
82a5f02c 34
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35
36// ----------------------------------------------------------------------------
37// wxSashLayoutWindow
38// ----------------------------------------------------------------------------
39
88ac883a 40#if wxUSE_SASH
a6d70308 41IMPLEMENT_CLASS(wxSashLayoutWindow, wxSashWindow)
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42BEGIN_EVENT_TABLE(wxSashLayoutWindow, wxSashWindow)
43 EVT_CALCULATE_LAYOUT(wxSashLayoutWindow::OnCalculateLayout)
44 EVT_QUERY_LAYOUT_INFO(wxSashLayoutWindow::OnQueryLayoutInfo)
45END_EVENT_TABLE()
46
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47bool wxSashLayoutWindow::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos,
48 const wxSize& size, long style, const wxString& name)
49{
50 return wxSashWindow::Create(parent, id, pos, size, style, name);
51}
52
53void wxSashLayoutWindow::Init()
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54{
55 m_orientation = wxLAYOUT_HORIZONTAL;
56 m_alignment = wxLAYOUT_TOP;
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57#ifdef __WXMAC__
58 MacSetClipChildren( true ) ;
59#endif
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60}
61
2243eed5 62// This is the function that wxLayoutAlgorithm calls to ascertain the window
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63// dimensions.
64void wxSashLayoutWindow::OnQueryLayoutInfo(wxQueryLayoutInfoEvent& event)
65{
341287bf 66 // int flags = event.GetFlags();
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67 int requestedLength = event.GetRequestedLength();
68
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69 event.SetOrientation(m_orientation);
70 event.SetAlignment(m_alignment);
71
72 if (m_orientation == wxLAYOUT_HORIZONTAL)
73 event.SetSize(wxSize(requestedLength, m_defaultSize.y));
74 else
75 event.SetSize(wxSize(m_defaultSize.x, requestedLength));
76}
77
78// Called by parent to allow window to take a bit out of the
79// client rectangle, and size itself if not in wxLAYOUT_QUERY mode.
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80
81void wxSashLayoutWindow::OnCalculateLayout(wxCalculateLayoutEvent& event)
82{
83 wxRect clientSize(event.GetRect());
84
85 int flags = event.GetFlags();
86
87 if (!IsShown())
88 return;
89
90 // Let's assume that all windows stretch the full extent of the window in
91 // the direction of that window orientation. This will work for non-docking toolbars,
92 // and the status bar. Note that the windows have to have been created in a certain
93 // order to work, else you might get a left-aligned window going to the bottom
94 // of the window, and the status bar appearing to the right of it. The
95 // status bar would have to be created after or before the toolbar(s).
96
97 wxRect thisRect;
98
99 // Try to stretch
100 int length = (GetOrientation() == wxLAYOUT_HORIZONTAL) ? clientSize.width : clientSize.height;
101 wxLayoutOrientation orient = GetOrientation();
102
103 // We assume that a window that says it's horizontal, wants to be stretched in that
104 // direction. Is this distinction too fine? Do we assume that any horizontal
105 // window needs to be stretched in that direction? Possibly.
106 int whichDimension = (GetOrientation() == wxLAYOUT_HORIZONTAL) ? wxLAYOUT_LENGTH_X : wxLAYOUT_LENGTH_Y;
107
108 wxQueryLayoutInfoEvent infoEvent(GetId());
109 infoEvent.SetEventObject(this);
110 infoEvent.SetRequestedLength(length);
111 infoEvent.SetFlags(orient | whichDimension);
112
113 if (!GetEventHandler()->ProcessEvent(infoEvent))
114 return;
115
116 wxSize sz = infoEvent.GetSize();
117
118 if (sz.x == 0 && sz.y == 0) // Assume it's invisible
119 return;
120
121 // Now we know the size it wants to be. We wish to decide where to place it, i.e.
122 // how it's aligned.
123 switch (GetAlignment())
124 {
125 case wxLAYOUT_TOP:
126 {
127 thisRect.x = clientSize.x; thisRect.y = clientSize.y;
128 thisRect.width = sz.x; thisRect.height = sz.y;
129 clientSize.y += thisRect.height;
130 clientSize.height -= thisRect.height;
131 break;
132 }
133 case wxLAYOUT_LEFT:
134 {
135 thisRect.x = clientSize.x; thisRect.y = clientSize.y;
136 thisRect.width = sz.x; thisRect.height = sz.y;
137 clientSize.x += thisRect.width;
138 clientSize.width -= thisRect.width;
139 break;
140 }
141 case wxLAYOUT_RIGHT:
142 {
143 thisRect.x = clientSize.x + (clientSize.width - sz.x); thisRect.y = clientSize.y;
144 thisRect.width = sz.x; thisRect.height = sz.y;
145 clientSize.width -= thisRect.width;
146 break;
147 }
148 case wxLAYOUT_BOTTOM:
149 {
150 thisRect.x = clientSize.x; thisRect.y = clientSize.y + (clientSize.height - sz.y);
151 thisRect.width = sz.x; thisRect.height = sz.y;
152 clientSize.height -= thisRect.height;
153 break;
154 }
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155 case wxLAYOUT_NONE:
156 {
88ac883a 157 break;
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158 }
159
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160 }
161
162 if ((flags & wxLAYOUT_QUERY) == 0)
163 {
164 // If not in query mode, resize the window.
165 // TODO: add wxRect& form to wxWindow::SetSize
17a1ebd1 166 wxSize sz2 = GetSize();
f6bcfd97 167 wxPoint pos = GetPosition();
a6d70308 168 SetSize(thisRect.x, thisRect.y, thisRect.width, thisRect.height);
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169
170 // Make sure the sash is erased when the window is resized
17a1ebd1 171 if ((pos.x != thisRect.x || pos.y != thisRect.y || sz2.x != thisRect.width || sz2.y != thisRect.height) &&
f6bcfd97 172 (GetSashVisible(wxSASH_TOP) || GetSashVisible(wxSASH_RIGHT) || GetSashVisible(wxSASH_BOTTOM) || GetSashVisible(wxSASH_LEFT)))
ca65c044 173 Refresh(true);
f6bcfd97 174
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175 }
176
177 event.SetRect(clientSize);
178}
88ac883a 179#endif // wxUSE_SASH
a6d70308 180
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181
182// ----------------------------------------------------------------------------
183// wxLayoutAlgorithm
184// ----------------------------------------------------------------------------
a6d70308 185
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186#if wxUSE_MDI_ARCHITECTURE
187
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188// Lays out windows for an MDI frame. The MDI client area gets what's left
189// over.
2243eed5 190bool wxLayoutAlgorithm::LayoutMDIFrame(wxMDIParentFrame* frame, wxRect* r)
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191{
192 int cw, ch;
193 frame->GetClientSize(& cw, & ch);
194
195 wxRect rect(0, 0, cw, ch);
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196 if (r)
197 rect = * r;
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198
199 wxCalculateLayoutEvent event;
200 event.SetRect(rect);
201
222ed1d6 202 wxWindowList::compatibility_iterator node = frame->GetChildren().GetFirst();
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203 while (node)
204 {
b1d4dd7a 205 wxWindow* win = node->GetData();
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206
207 event.SetId(win->GetId());
208 event.SetEventObject(win);
209 event.SetFlags(0); // ??
210
211 win->GetEventHandler()->ProcessEvent(event);
212
b1d4dd7a 213 node = node->GetNext();
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214 }
215
216 wxWindow* clientWindow = frame->GetClientWindow();
217
218 rect = event.GetRect();
219
220 clientWindow->SetSize(rect.x, rect.y, rect.width, rect.height);
221
ca65c044 222 return true;
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223}
224
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225#endif // wxUSE_MDI_ARCHITECTURE
226
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227bool wxLayoutAlgorithm::LayoutFrame(wxFrame* frame, wxWindow* mainWindow)
228{
229 return LayoutWindow(frame, mainWindow);
230}
231
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232// Layout algorithm for any window. mainWindow gets what's left over.
233bool wxLayoutAlgorithm::LayoutWindow(wxWindow* parent, wxWindow* mainWindow)
a6d70308 234{
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235 // Test if the parent is a sash window, and if so,
236 // reduce the available space to allow space for any active edges.
237
238 int leftMargin = 0, rightMargin = 0, topMargin = 0, bottomMargin = 0;
88ac883a 239#if wxUSE_SASH
345c78ca 240 if (wxDynamicCast(parent, wxSashWindow))
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241 {
242 wxSashWindow* sashWindow = (wxSashWindow*) parent;
243
244 leftMargin = sashWindow->GetExtraBorderSize();
245 rightMargin = sashWindow->GetExtraBorderSize();
246 topMargin = sashWindow->GetExtraBorderSize();
247 bottomMargin = sashWindow->GetExtraBorderSize();
248
249 if (sashWindow->GetSashVisible(wxSASH_LEFT))
250 leftMargin += sashWindow->GetDefaultBorderSize();
251 if (sashWindow->GetSashVisible(wxSASH_RIGHT))
252 rightMargin += sashWindow->GetDefaultBorderSize();
253 if (sashWindow->GetSashVisible(wxSASH_TOP))
254 topMargin += sashWindow->GetDefaultBorderSize();
255 if (sashWindow->GetSashVisible(wxSASH_BOTTOM))
256 bottomMargin += sashWindow->GetDefaultBorderSize();
257 }
88ac883a 258#endif // wxUSE_SASH
f9b1708c 259
a6d70308 260 int cw, ch;
f9b1708c 261 parent->GetClientSize(& cw, & ch);
a6d70308 262
f9b1708c 263 wxRect rect(leftMargin, topMargin, cw - leftMargin - rightMargin, ch - topMargin - bottomMargin);
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264
265 wxCalculateLayoutEvent event;
266 event.SetRect(rect);
267
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268 // Find the last layout-aware window, so we can make it fill all remaining
269 // space.
ca65c044 270 wxWindow *lastAwareWindow = NULL;
222ed1d6 271 wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst();
b1d4dd7a 272
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273 while (node)
274 {
b1d4dd7a 275 wxWindow* win = node->GetData();
a6d70308 276
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277 if (win->IsShown())
278 {
279 wxCalculateLayoutEvent tempEvent(win->GetId());
280 tempEvent.SetEventObject(win);
281 tempEvent.SetFlags(wxLAYOUT_QUERY);
282 tempEvent.SetRect(event.GetRect());
283 if (win->GetEventHandler()->ProcessEvent(tempEvent))
284 lastAwareWindow = win;
285 }
286
b1d4dd7a 287 node = node->GetNext();
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288 }
289
8c023dee 290 // Now do a dummy run to see if we have any space left for the final window (fail if not)
b1d4dd7a 291 node = parent->GetChildren().GetFirst();
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292 while (node)
293 {
b1d4dd7a 294 wxWindow* win = node->GetData();
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295
296 // If mainWindow is NULL and we're at the last window,
297 // skip this, because we'll simply make it fit the remaining space.
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298 if (win->IsShown() && (win != mainWindow) && (mainWindow != NULL || win != lastAwareWindow))
299 {
300 event.SetId(win->GetId());
301 event.SetEventObject(win);
302 event.SetFlags(wxLAYOUT_QUERY);
303
304 win->GetEventHandler()->ProcessEvent(event);
305 }
306
b1d4dd7a 307 node = node->GetNext();
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308 }
309
310 if (event.GetRect().GetWidth() < 0 || event.GetRect().GetHeight() < 0)
ca65c044 311 return false;
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312
313 event.SetRect(rect);
314
b1d4dd7a 315 node = parent->GetChildren().GetFirst();
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316 while (node)
317 {
b1d4dd7a 318 wxWindow* win = node->GetData();
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319
320 // If mainWindow is NULL and we're at the last window,
321 // skip this, because we'll simply make it fit the remaining space.
322 if (win->IsShown() && (win != mainWindow) && (mainWindow != NULL || win != lastAwareWindow))
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323 {
324 event.SetId(win->GetId());
325 event.SetEventObject(win);
326 event.SetFlags(0); // ??
a6d70308 327
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328 win->GetEventHandler()->ProcessEvent(event);
329 }
a6d70308 330
b1d4dd7a 331 node = node->GetNext();
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332 }
333
334 rect = event.GetRect();
335
44c4a334 336 if (mainWindow)
d11bb14f 337 mainWindow->SetSize(rect.x, rect.y, wxMax(0, rect.width), wxMax(0, rect.height));
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338 else if (lastAwareWindow)
339 {
340 // Fit the remaining space
d11bb14f 341 lastAwareWindow->SetSize(rect.x, rect.y, wxMax(0, rect.width), wxMax(0, rect.height));
2f82899b 342 }
a6d70308 343
ca65c044 344 return true;
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345}
346