A non-GTK version of menus for touchui.

base/message_pump_glib.h

 // Copyright (c) 2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_MESSAGE_PUMP_GLIB_H_
 #define BASE_MESSAGE_PUMP_GLIB_H_
 #pragma once
 
 #include "base/message_pump.h"
 #include "base/observer_list.h"
@@ skipping 74 matching lines @@
   void RemoveObserver(Observer* observer);
 
   // Dispatch an available GdkEvent. Essentially this allows a subclass to do
   // some task before/after calling the default handler (EventDispatcher).
   virtual void DispatchEvents(GdkEvent* event);
 
  protected:
   // Returns the dispatcher for the current run state (|state_->dispatcher|).
   Dispatcher* GetDispatcher();
 
- private:
   // We may make recursive calls to Run, so we save state that needs to be
   // separate between them in this structure type.
-  struct RunState;
+  struct RunState {

[rjkroege, 2010/11/23 23:38:54]

why did you have to move this into the include? It could be a separate class?

[sadrul, 2010/11/24 00:55:21]

the |should_quit| needs to be set from inside MessagePumpGlibX, i.e. it needs to
be able to see |should_quit|. So the definition of the struct (which was already
declared inside MessagePumpGlib) needed to move into here.

+    Delegate* delegate;
+    Dispatcher* dispatcher;
 
+    // Used to flag that the current Run() invocation should return ASAP.
+    bool should_quit;
+
+    // Used to count how many Run() invocations are on the stack.
+    int run_depth;
+
+    // This keeps the state of whether the pump got signaled that there was new
+    // work to be done. Since we eat the message on the wake up pipe as soon as
+    // we get it, we keep that state here to stay consistent.
+    bool has_work;
+  };
+
+  RunState* state_;
+
+ private:
   // Invoked from EventDispatcher. Notifies all observers we're about to
   // process an event.
   void WillProcessEvent(GdkEvent* event);
 
   // Invoked from EventDispatcher. Notifies all observers we processed an
   // event.
   void DidProcessEvent(GdkEvent* event);
 
   // Callback prior to gdk dispatching an event.
   static void EventDispatcher(GdkEvent* event, void* data);
 
-  RunState* state_;
-
   // This is a GLib structure that we can add event sources to.  We use the
   // default GLib context, which is the one to which all GTK events are
   // dispatched.
   GMainContext* context_;
 
   // This is the time when we need to do delayed work.
   TimeTicks delayed_work_time_;
 
   // The work source.  It is shared by all calls to Run and destroyed when
   // the message pump is destroyed.
@@ skipping 10 matching lines @@
 
   // List of observers.
   ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(MessagePumpForUI);
 };
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_PUMP_GLIB_H_