From f9039b2ae21988783feae9b362818e7923e82d14 Mon Sep 17 00:00:00 2001
From: Michael R Sweet <michael.r.sweet@gmail.com>
Date: Tue, 6 Oct 1998 18:21:25 +0000
Subject: Initial revision

git-svn-id: file:///fltk/svn/fltk/trunk@2 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 src/Fl_Menu_Window.cxx | 130 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)
 create mode 100644 src/Fl_Menu_Window.cxx

(limited to 'src/Fl_Menu_Window.cxx')

diff --git a/src/Fl_Menu_Window.cxx b/src/Fl_Menu_Window.cxx
new file mode 100644
index 000000000..f74db6ea2
--- /dev/null
+++ b/src/Fl_Menu_Window.cxx
@@ -0,0 +1,130 @@
+// Fl_Menu_Window.H
+
+// This is the window type used by Fl_Menu to make the pop-ups.
+// It draws in the overlay planes if possible.
+
+// Also here is the implementation of the mouse & keyboard grab,
+// which are used so that clicks outside the program's windows
+// can be used to dismiss the menus.
+
+#include <config.h>
+#include <FL/Fl.H>
+#include <FL/x.H>
+#include <FL/fl_draw.H>
+#include <FL/Fl_Menu_Window.H>
+
+// WIN32 note: HAVE_OVERLAY is false
+#if HAVE_OVERLAY
+extern XVisualInfo *fl_find_overlay_visual();
+extern XVisualInfo *fl_overlay_visual;
+extern Colormap fl_overlay_colormap;
+extern unsigned long fl_transparent_pixel;
+static GC gc;	// the GC used by all X windows
+extern uchar fl_overlay; // changes how fl_color(x) works
+#endif
+
+#include <stdio.h>
+
+void Fl_Menu_Window::show() {
+#if HAVE_OVERLAY
+  if (!shown() && overlay() && fl_find_overlay_visual()) {
+    XInstallColormap(fl_display, fl_overlay_colormap);
+    fl_background_pixel = int(fl_transparent_pixel);
+    Fl_X::make_xid(this, fl_overlay_visual, fl_overlay_colormap);
+    fl_background_pixel = -1;
+  } else
+#endif
+    Fl_Single_Window::show();
+}
+
+void Fl_Menu_Window::flush() {
+#if HAVE_OVERLAY
+  if (!fl_overlay_visual || !overlay()) {Fl_Single_Window::flush(); return;}
+  Fl_X *i = Fl_X::i(this);
+  fl_window = i->xid;
+  if (!gc) gc = XCreateGC(fl_display, i->xid, 0, 0);
+  fl_gc = gc;
+  fl_overlay = 1;
+  fl_clip_region(i->region); i->region = 0;
+  draw();
+  fl_overlay = 0;
+#else
+  Fl_Single_Window::flush();
+#endif
+}
+
+void Fl_Menu_Window::erase() {
+#if HAVE_OVERLAY
+  if (!gc || !shown()) return;
+//XSetForeground(fl_display, gc, 0);
+//XFillRectangle(fl_display, fl_xid(this), gc, 0, 0, w(), h());
+  XClearWindow(fl_display, fl_xid(this));
+#endif
+}
+
+// Fix the colormap flashing on Maximum Impact Graphics by erasing the
+// menu before unmapping it:
+void Fl_Menu_Window::hide() {
+  erase();
+  Fl_Single_Window::hide();
+}
+
+Fl_Menu_Window::~Fl_Menu_Window() {
+  hide();
+}
+
+////////////////////////////////////////////////////////////////
+// "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.C it isn't).
+// Under X override_redirect and save_under is done to new windows.
+// The system is also told to "grab" events and send them to this app.
+
+extern void fl_fix_focus();
+#ifdef WIN32
+HWND fl_capture; // for some reason we must keep forcing it back on!
+#endif
+
+void Fl::grab(Fl_Window& w) {
+  grab_ = &w;
+  fl_fix_focus();
+#ifdef WIN32
+  // this seems to have no effect...
+  SetCapture(fl_capture = fl_xid(first_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
+}
+
+void Fl::release() {
+  grab_ = 0;
+  fl_fix_focus();
+#ifdef WIN32
+  fl_capture = 0;
+  ReleaseCapture();
+#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
+  return;
+}
+
+// end of Fl_Menu_Window.C
-- 
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