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// Copyright (c) 2009 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 CHROME_BROWSER_GTK_CUSTOM_BUTTON_H_
#define CHROME_BROWSER_GTK_CUSTOM_BUTTON_H_
#include <gtk/gtk.h>
#include <string>
#include "base/gfx/rect.h"
#include "base/scoped_ptr.h"
#include "chrome/common/notification_observer.h"
#include "chrome/common/notification_registrar.h"
#include "chrome/common/owned_widget_gtk.h"
class ThemeProvider;
// These classes implement two kinds of custom-drawn buttons. They're
// used on the toolbar and the bookmarks bar.
// CustomDrawButtonBase provides the base for building a custom drawn button.
// It handles managing the pixbufs containing all the static images used to draw
// the button. It also manages painting these pixbufs.
class CustomDrawButtonBase : public NotificationObserver {
public:
// If the images come from ResourceBundle rather than the theme provider,
// pass in NULL for |theme_provider|.
CustomDrawButtonBase(ThemeProvider* theme_provider,
int normal_id,
int active_id,
int highlight_id,
int depressed_id);
~CustomDrawButtonBase();
GdkPixbuf* pixbufs(int i) const { return pixbufs_[i]; }
gboolean OnExpose(GtkWidget* widget, GdkEventExpose* e);
void set_paint_override(int state) { paint_override_ = state; }
// Provide NotificationObserver implementation.
virtual void Observe(NotificationType type,
const NotificationSource& source,
const NotificationDetails& details);
private:
// We store one GdkPixbuf* for each possible state of the button;
// INSENSITIVE is the last available state;
GdkPixbuf* pixbufs_[GTK_STATE_INSENSITIVE + 1];
// If non-negative, the state to paint the button.
int paint_override_;
// We need to remember the image ids that the user passes in and the theme
// provider so we can reload images if the user changes theme.
int normal_id_;
int active_id_;
int highlight_id_;
int depressed_id_;
ThemeProvider* theme_provider_;
// Used to listen for theme change notifications.
NotificationRegistrar registrar_;
DISALLOW_COPY_AND_ASSIGN(CustomDrawButtonBase);
};
// CustomDrawButton is a plain button where all its various states are drawn
// with static images. In GTK rendering mode, it will show the standard button
// with GTK |stock_id|.
class CustomDrawButton {
public:
// The constructor takes 4 resource ids. If a resource doesn't exist for a
// button, pass in 0.
CustomDrawButton(int normal_id,
int active_id,
int highlight_id,
int depressed_id,
const char* stock_id);
// Same as above, but uses themed (and possibly tinted) images.
CustomDrawButton(ThemeProvider* theme_provider,
int normal_id,
int active_id,
int highlight_id,
int depressed_id,
const char* stock_id);
~CustomDrawButton();
void Init();
GtkWidget* widget() const { return widget_.get(); }
gfx::Rect bounds() const {
return gfx::Rect(widget_->allocation.x,
widget_->allocation.y,
widget_->allocation.width,
widget_->allocation.height);
}
int width() const { return widget_->allocation.width; }
int height() const { return widget_->allocation.height; }
// Sets properties on the GtkButton returned by widget(). By default, the
// button is very boring. This will either give it an image from the
// |gtk_stock_name_| if |use_gtk| is true or will use the chrome frame
// images.
void SetUseSystemTheme(bool use_gtk);
// Set the state to draw. We will paint the widget as if it were in this
// state.
void SetPaintOverride(GtkStateType state);
// Resume normal drawing of the widget's state.
void UnsetPaintOverride();
// Returns a standard close button.
static CustomDrawButton* CloseButton();
private:
// Callback for custom button expose, used to draw the custom graphics.
static gboolean OnCustomExpose(GtkWidget* widget,
GdkEventExpose* e,
CustomDrawButton* obj);
// The actual button widget.
OwnedWidgetGtk widget_;
CustomDrawButtonBase button_base_;
// The stock icon name.
const char* gtk_stock_name_;
// Whether we have an expose signal handler we may need to remove.
bool has_expose_signal_handler_;
DISALLOW_COPY_AND_ASSIGN(CustomDrawButton);
};
#endif // CHROME_BROWSER_GTK_CUSTOM_BUTTON_H_
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