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