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//
// "$Id$"
//
// Grab/release code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2010 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
#include <config.h>
#include <FL/Fl.H>
#include <FL/x.H>
////////////////////////////////////////////////////////////////
// "Grab" is done while menu systems are up. This has several effects:
// Events are all sent to the "grab window", which does not even
// have to be displayed (and in the case of Fl_Menu.cxx it isn't).
// The system is also told to "grab" events and send them to this app.
// This also modifies how Fl_Window::show() works, on X it turns on
// override_redirect, it does similar things on WIN32.
extern void fl_fix_focus(); // in Fl.cxx
#ifdef WIN32
// We have to keep track of whether we have captured the mouse, since
// MSWindows shows little respect for this... Grep for fl_capture to
// see where and how this is used.
extern HWND fl_capture;
#endif
#ifdef __APPLE__
extern void *fl_capture;
#endif
void Fl::grab(Fl_Window* win) {
if (win) {
if (!grab_) {
#ifdef WIN32
SetActiveWindow(fl_capture = fl_xid(first_window()));
SetCapture(fl_capture);
#elif defined(__APPLE__)
fl_capture = Fl_X::i(first_window())->xid;
Fl_X::i(first_window())->set_key_window();
#else
XGrabPointer(fl_display,
fl_xid(first_window()),
1,
ButtonPressMask|ButtonReleaseMask|
ButtonMotionMask|PointerMotionMask,
GrabModeAsync,
GrabModeAsync,
None,
0,
fl_event_time);
XGrabKeyboard(fl_display,
fl_xid(first_window()),
1,
GrabModeAsync,
GrabModeAsync,
fl_event_time);
#endif
}
grab_ = win;
} else {
if (grab_) {
#ifdef WIN32
fl_capture = 0;
ReleaseCapture();
#elif defined(__APPLE__)
fl_capture = 0;
#else
XUngrabKeyboard(fl_display, fl_event_time);
XUngrabPointer(fl_display, fl_event_time);
// this flush is done in case the picked menu item goes into
// an infinite loop, so we don't leave the X server locked up:
XFlush(fl_display);
#endif
grab_ = 0;
fl_fix_focus();
}
}
}
//
// End of "$Id$".
//
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