| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: reparent.cpp |
| 3 | // Purpose: wxWindow |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 2002-03-09 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | // ============================================================================ |
| 13 | // declarations |
| 14 | // ============================================================================ |
| 15 | |
| 16 | // ---------------------------------------------------------------------------- |
| 17 | // headers |
| 18 | // ---------------------------------------------------------------------------- |
| 19 | |
| 20 | #ifdef __GNUG__ |
| 21 | #pragma implementation "reparent.h" |
| 22 | #endif |
| 23 | |
| 24 | #include "wx/x11/reparent.h" |
| 25 | |
| 26 | #if !wxUSE_NANOX |
| 27 | |
| 28 | #include "wx/evtloop.h" |
| 29 | #include "wx/log.h" |
| 30 | #include "wx/app.h" |
| 31 | #include "wx/timer.h" |
| 32 | |
| 33 | #include "wx/x11/private.h" |
| 34 | #include "X11/Xatom.h" |
| 35 | |
| 36 | /* |
| 37 | |
| 38 | Adapted from code by Mike Yang, as follows. |
| 39 | |
| 40 | From: Mike Yang (mikey@eukanuba.wpd.sgi.com) |
| 41 | Subject: Re: Wrapping new widget around existing windows |
| 42 | Newsgroups: comp.windows.x |
| 43 | View: Complete Thread (17 articles) | Original Format |
| 44 | Date: 1991-08-09 09:45:48 PST |
| 45 | |
| 46 | |
| 47 | Enough people asked, so here's my test program which reparents another |
| 48 | window. It's a single file (reparent.c), and will work with Motif or |
| 49 | Xaw. Xaw users should comment out the "#define MOTIF" line. |
| 50 | |
| 51 | The reparent program first prompts for the application name of the |
| 52 | client that it will reparent. If you're going to start the |
| 53 | application override_redirect (e.g. -xrm "*overrideRedirect: true"), |
| 54 | then this name is ignored and the first override_redirect window is |
| 55 | assumed to be the one. |
| 56 | |
| 57 | Input focus is supposed to be correctly handled, as is resizing with |
| 58 | window manager hints. If you have input focus problems, try launching |
| 59 | your application override_redirect instead. This method is preferred |
| 60 | anyway, since you can map it off-screen and then avoid the "window |
| 61 | flash" effect as the application's top-level window is reparented. |
| 62 | |
| 63 | ----------------------------------------------------------------------- |
| 64 | Mike Yang Silicon Graphics, Inc. |
| 65 | mikey@sgi.com 415/335-1786 |
| 66 | |
| 67 | |
| 68 | ------------------------------- cut here ------------------------------ |
| 69 | */ |
| 70 | |
| 71 | /* |
| 72 | |
| 73 | Copyright 1991 by Mike Yang, mikey@sgi.com, Silicon Graphics, Inc. |
| 74 | |
| 75 | Permission to use, copy, modify, distribute, and sell this software and its |
| 76 | documentation for any purpose is hereby granted without fee, provided that |
| 77 | the above copyright notice appear in all copies and that both that |
| 78 | copyright notice and this permission notice appear in supporting |
| 79 | documentation, and that the name of SGI not be used in advertising or |
| 80 | publicity pertaining to distribution of the software without specific, |
| 81 | written prior permission. SGI makes no representations about the |
| 82 | suitability of this software for any purpose. It is provided "as is" |
| 83 | without express or implied warranty. |
| 84 | |
| 85 | */ |
| 86 | |
| 87 | /* |
| 88 | * wxAdoptedWindow |
| 89 | */ |
| 90 | |
| 91 | wxAdoptedWindow::wxAdoptedWindow() |
| 92 | { |
| 93 | } |
| 94 | |
| 95 | wxAdoptedWindow::wxAdoptedWindow(WXWindow window) |
| 96 | { |
| 97 | m_mainWindow = window; |
| 98 | } |
| 99 | |
| 100 | wxAdoptedWindow::~wxAdoptedWindow() |
| 101 | { |
| 102 | } |
| 103 | /* |
| 104 | * wxReparenter |
| 105 | */ |
| 106 | |
| 107 | static bool Xerror; |
| 108 | static Atom WM_STATE = 0; |
| 109 | bool wxReparenter::sm_done = FALSE; |
| 110 | wxAdoptedWindow* wxReparenter::sm_toReparent = NULL; |
| 111 | wxWindow* wxReparenter::sm_newParent = NULL; |
| 112 | wxString wxReparenter::sm_name; |
| 113 | bool wxReparenter::sm_exactMatch = FALSE; |
| 114 | |
| 115 | static int |
| 116 | ErrorHandler(Display* dpy, XErrorEvent* event) |
| 117 | { |
| 118 | Xerror = True; |
| 119 | return False; |
| 120 | } |
| 121 | |
| 122 | // We assume that toReparent has had its X window set |
| 123 | // appropriately. |
| 124 | bool wxReparenter::Reparent(wxWindow* newParent, wxAdoptedWindow* toReparent) |
| 125 | { |
| 126 | XWindowAttributes xwa; |
| 127 | Window *children; |
| 128 | unsigned int numchildren, each; |
| 129 | Window returnroot, returnparent; |
| 130 | XErrorHandler old; |
| 131 | int parentOffset = 0; |
| 132 | |
| 133 | old = XSetErrorHandler(ErrorHandler); |
| 134 | XReparentWindow( wxGlobalDisplay(), |
| 135 | (Window) toReparent->GetMainWindow(), |
| 136 | (Window) newParent->GetMainWindow(), |
| 137 | 0, 0); |
| 138 | |
| 139 | if (!XQueryTree( wxGlobalDisplay(), |
| 140 | (Window) toReparent->GetMainWindow(), |
| 141 | &returnroot, &returnparent, |
| 142 | &children, &numchildren) || Xerror) |
| 143 | { |
| 144 | XSetErrorHandler(old); |
| 145 | return TRUE; |
| 146 | } |
| 147 | |
| 148 | if (numchildren > 0) |
| 149 | { |
| 150 | // TEST: see if we can get away with reparenting just |
| 151 | // first one |
| 152 | if (numchildren > 1) |
| 153 | { |
| 154 | wxLogDebug(wxT("Found %d, but only reparenting 1 child."), numchildren); |
| 155 | numchildren = 1; |
| 156 | } |
| 157 | wxLogDebug(wxT("Reparenting %d children."), numchildren); |
| 158 | /* Stacking order is preserved since XQueryTree returns its children in |
| 159 | bottommost to topmost order |
| 160 | */ |
| 161 | for (each=0; each<numchildren; each++) |
| 162 | { |
| 163 | XGetWindowAttributes( wxGlobalDisplay(), |
| 164 | children[each], &xwa); |
| 165 | fprintf(stderr, |
| 166 | "Reparenting child at offset %d and position %d, %d.\n", |
| 167 | parentOffset, parentOffset+xwa.x, parentOffset+xwa.y); |
| 168 | XReparentWindow( wxGlobalDisplay(), |
| 169 | children[each], (Window) newParent->GetMainWindow(), |
| 170 | xwa.x, xwa.y); |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | XSetErrorHandler(old); |
| 175 | return TRUE; |
| 176 | } |
| 177 | |
| 178 | // Wait for an appropriate window to be created. |
| 179 | // If exactMatch is FALSE, a substring match is OK. |
| 180 | // If windowName is empty, then wait for the next overrideRedirect window. |
| 181 | bool wxReparenter::WaitAndReparent(wxWindow* newParent, wxAdoptedWindow* toReparent, |
| 182 | const wxString& windowName, |
| 183 | bool exactMatch) |
| 184 | { |
| 185 | sm_newParent = newParent; |
| 186 | sm_toReparent = toReparent; |
| 187 | sm_exactMatch = exactMatch; |
| 188 | sm_name = windowName; |
| 189 | |
| 190 | Display* display = wxGlobalDisplay(); |
| 191 | XSelectInput(display, |
| 192 | RootWindowOfScreen(DefaultScreenOfDisplay(display)), |
| 193 | SubstructureNotifyMask); |
| 194 | |
| 195 | if (!WM_STATE) |
| 196 | WM_STATE = XInternAtom(display, "WM_STATE", False); |
| 197 | |
| 198 | #ifdef __WXDEBUG__ |
| 199 | if (!windowName.IsEmpty()) |
| 200 | wxLogDebug(_T("Waiting for window %s"), windowName.c_str()); |
| 201 | #endif |
| 202 | |
| 203 | sm_done = FALSE; |
| 204 | |
| 205 | wxEventLoop eventLoop; |
| 206 | while (!sm_done) |
| 207 | { |
| 208 | if (eventLoop.Pending()) |
| 209 | { |
| 210 | XEvent xevent; |
| 211 | XNextEvent(display, & xevent); |
| 212 | if (!wxTheApp->ProcessXEvent((WXEvent*) & xevent)) |
| 213 | { |
| 214 | // Do the local event processing |
| 215 | ProcessXEvent((WXEvent*) & xevent); |
| 216 | } |
| 217 | } |
| 218 | else |
| 219 | { |
| 220 | #if wxUSE_TIMER |
| 221 | wxTimer::NotifyTimers(); |
| 222 | wxTheApp->SendIdleEvents(); |
| 223 | #endif |
| 224 | } |
| 225 | } |
| 226 | return TRUE; |
| 227 | } |
| 228 | |
| 229 | bool wxReparenter::ProcessXEvent(WXEvent* event) |
| 230 | { |
| 231 | XEvent* xevent = (XEvent*) event; |
| 232 | Window client; |
| 233 | |
| 234 | if (!sm_done) |
| 235 | { |
| 236 | if (xevent->type == MapNotify) |
| 237 | { |
| 238 | wxLogDebug(_T("Window was mapped")); |
| 239 | } |
| 240 | |
| 241 | if (xevent->type == MapNotify && !xevent->xmap.override_redirect && |
| 242 | (client = (Window) FindAClientWindow((WXWindow) xevent->xmap.window, sm_name))) |
| 243 | { |
| 244 | wxLogDebug(_T("Found a client window, about to reparent")); |
| 245 | wxASSERT(sm_toReparent->GetParent() == NULL); |
| 246 | |
| 247 | sm_toReparent->SetHandle((WXWindow) client); |
| 248 | sm_newParent->AddChild(sm_toReparent); |
| 249 | sm_done = Reparent(sm_newParent, sm_toReparent); |
| 250 | return sm_done; |
| 251 | } else if (xevent->type == MapNotify && |
| 252 | xevent->xmap.override_redirect && |
| 253 | xevent->xmap.window) |
| 254 | { |
| 255 | wxLogDebug(_T("Found an override redirect window, about to reparent")); |
| 256 | sm_toReparent->SetHandle((WXWindow) xevent->xmap.window); |
| 257 | sm_newParent->AddChild(sm_toReparent); |
| 258 | wxASSERT(sm_toReparent->GetParent() == NULL); |
| 259 | |
| 260 | sm_done = Reparent(sm_newParent, sm_toReparent); |
| 261 | return sm_done; |
| 262 | } |
| 263 | } |
| 264 | return FALSE; |
| 265 | } |
| 266 | |
| 267 | WXWindow wxReparenter::FindAClientWindow(WXWindow window, const wxString& name) |
| 268 | { |
| 269 | int rvalue, i; |
| 270 | Atom actualtype; |
| 271 | int actualformat; |
| 272 | unsigned long nitems, bytesafter; |
| 273 | unsigned char *propreturn; |
| 274 | Window *children; |
| 275 | unsigned int numchildren; |
| 276 | Window returnroot, returnparent; |
| 277 | Window result = 0; |
| 278 | XErrorHandler old; |
| 279 | char *clientName; |
| 280 | |
| 281 | Xerror = False; |
| 282 | old = XSetErrorHandler(ErrorHandler); |
| 283 | rvalue = XGetWindowProperty((Display*) wxGetDisplay(), |
| 284 | (Window) window, WM_STATE, |
| 285 | 0, 1, False, |
| 286 | AnyPropertyType, &actualtype, &actualformat, |
| 287 | &nitems, &bytesafter, &propreturn); |
| 288 | XSetErrorHandler(old); |
| 289 | if (!Xerror && rvalue == Success && actualtype != None) |
| 290 | { |
| 291 | if (rvalue == Success) |
| 292 | { |
| 293 | XFree((char *) propreturn); |
| 294 | } |
| 295 | XFetchName((Display*) wxGetDisplay(), (Window) window, &clientName); |
| 296 | |
| 297 | wxString str1(name); |
| 298 | wxString str2(clientName); |
| 299 | str1.Lower(); |
| 300 | str2.Lower(); |
| 301 | |
| 302 | bool matches; |
| 303 | if (sm_exactMatch) |
| 304 | matches = (name == clientName); |
| 305 | else |
| 306 | matches = (str1.Contains(str2) || str2.Contains(str1)); |
| 307 | |
| 308 | XFree(clientName); |
| 309 | |
| 310 | if (matches) |
| 311 | return (WXWindow) window; |
| 312 | else |
| 313 | return NULL; |
| 314 | } |
| 315 | |
| 316 | old = XSetErrorHandler(ErrorHandler); |
| 317 | if (!XQueryTree((Display*) wxGetDisplay(), (Window) window, &returnroot, &returnparent, |
| 318 | &children, &numchildren) || Xerror) { |
| 319 | XSetErrorHandler(old); |
| 320 | return NULL; |
| 321 | } |
| 322 | XSetErrorHandler(old); |
| 323 | |
| 324 | result = 0; |
| 325 | for (i=0; i<(int)numchildren && !result ;i++) { |
| 326 | result = (Window) FindAClientWindow((WXWindow) children[i], name); |
| 327 | } |
| 328 | if (numchildren) { |
| 329 | XFree((char *) children); |
| 330 | } return (WXWindow) result; |
| 331 | } |
| 332 | |
| 333 | #endif |