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// Copyright (c) 2010 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 VIEWS_CONTROLS_NATIVE_HOST_VIEW_GTK_H_
#define VIEWS_CONTROLS_NATIVE_HOST_VIEW_GTK_H_
#pragma once
#include <gtk/gtk.h>
#include <string>
#include "base/logging.h"
#include "gfx/rect.h"
#include "views/controls/native/native_view_host_wrapper.h"
namespace views {
class View;
class WidgetGtk;
// Note that the NativeViewHostGtk assumes ownership of the GtkWidget attached
// to it for the duration of its attachment. This is so the NativeViewHostGtk
// can safely reparent the GtkWidget in multiple passes without having to worry
// about the GtkWidget's refcnt falling to 0.
class NativeViewHostGtk : public NativeViewHostWrapper {
public:
explicit NativeViewHostGtk(NativeViewHost* host);
virtual ~NativeViewHostGtk();
// Overridden from NativeViewHostWrapper:
virtual void NativeViewAttached();
virtual void NativeViewDetaching(bool destroyed);
virtual void AddedToWidget();
virtual void RemovedFromWidget();
virtual void InstallClip(int x, int y, int w, int h);
virtual bool HasInstalledClip();
virtual void UninstallClip();
virtual void ShowWidget(int x, int y, int w, int h);
virtual void HideWidget();
virtual void SetFocus();
private:
// Create and Destroy the GtkFixed that performs clipping on our hosted
// GtkWidget. |needs_window| is true when a clip is installed and implies the
// fixed is backed by a X Window which actually performs the clipping.
// It's kind of retarded that Gtk/Cairo doesn't clip painting of child windows
// regardless of whether or not there's an X Window. It's not that hard.
void CreateFixed(bool needs_window);
// Destroys the GtkFixed that performs clipping on our hosted GtkWidget.
void DestroyFixed();
WidgetGtk* GetHostWidget() const;
// Returns the descendant of fixed_ that has focus, or NULL if focus is not
// on a descendant of fixed_.
GtkWidget* GetFocusedDescendant();
// Invoked from the 'destroy' signal.
static void CallDestroy(GtkObject* object, NativeViewHostGtk* host);
// Invoked from the 'focus-in-event' signal.
static gboolean CallFocusIn(GtkWidget* widget,
GdkEventFocus* event,
NativeViewHostGtk* button);
// Our associated NativeViewHost.
NativeViewHost* host_;
// Have we installed a region on the gfx::NativeView used to clip to only the
// visible portion of the gfx::NativeView ?
bool installed_clip_;
// The installed clip rect. InstallClip doesn't actually perform the clipping,
// a call to ShowWidget will.
gfx::Rect installed_clip_bounds_;
// Signal handle id for 'destroy' signal.
gulong destroy_signal_id_;
// Signal handle id for 'focus-in-event' signal.
gulong focus_signal_id_;
// The GtkFixed that contains the attached gfx::NativeView (used for
// clipping).
GtkWidget* fixed_;
DISALLOW_COPY_AND_ASSIGN(NativeViewHostGtk);
};
} // namespace views
#endif // VIEWS_CONTROLS_NATIVE_HOST_VIEW_GTK_H_
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