94 lines
2.8 KiB
C++
94 lines
2.8 KiB
C++
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//
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// "$Id: Fl_grab.cxx,v 1.1 1999/02/03 08:43:33 bill Exp $"
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//
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// Grab/release code for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-1999 by Bill Spitzak and others.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems to "fltk-bugs@easysw.com".
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//
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#include <config.h>
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#include <FL/Fl.H>
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#include <FL/x.H>
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////////////////////////////////////////////////////////////////
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// "Grab" is done while menu systems are up. This has several effects:
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// Events are all sent to the "grab window", which does not even
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// have to be displayed (and in the case of Fl_Menu.C it isn't).
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// The system is also told to "grab" events and send them to this app.
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// This also modifies how Fl_Window::show() works, on X it turns on
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// override_redirect, it does similar things on WIN32.
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extern void fl_send_extra_move(); // in Fl.cxx
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#ifdef WIN32
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// We have to keep track of whether we have captured the mouse, since
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// MSWindows shows little respect for this... Grep for fl_capture to
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// see where and how this is used.
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extern HWND fl_capture;
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#endif
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void Fl::grab(Fl_Window* w) {
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if (w) {
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if (!grab_) {
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#ifdef WIN32
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SetActiveWindow(fl_capture = fl_xid(first_window()));
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SetCapture(fl_capture);
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#else
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XGrabPointer(fl_display,
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fl_xid(first_window()),
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1,
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ButtonPressMask|ButtonReleaseMask|
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ButtonMotionMask|PointerMotionMask,
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GrabModeAsync,
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GrabModeAsync,
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None,
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0,
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fl_event_time);
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XGrabKeyboard(fl_display,
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fl_xid(first_window()),
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1,
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GrabModeAsync,
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GrabModeAsync,
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fl_event_time);
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#endif
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}
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grab_ = w;
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} else {
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if (grab_) {
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#ifdef WIN32
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fl_capture = 0;
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ReleaseCapture();
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#else
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XUngrabKeyboard(fl_display, fl_event_time);
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XUngrabPointer(fl_display, fl_event_time);
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// this flush is done in case the picked menu item goes into
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// an infinite loop, so we don't leave the X server locked up:
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XFlush(fl_display);
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#endif
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grab_ = 0;
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fl_send_extra_move();
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}
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}
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}
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//
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// End of "$Id: Fl_grab.cxx,v 1.1 1999/02/03 08:43:33 bill Exp $".
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//
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