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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.
#include "chrome/browser/gtk/custom_button.h"
#include "app/l10n_util.h"
#include "app/resource_bundle.h"
#include "app/theme_provider.h"
#include "base/basictypes.h"
#include "base/gfx/gtk_util.h"
#include "chrome/browser/gtk/gtk_theme_provider.h"
#include "chrome/common/notification_service.h"
#include "grit/theme_resources.h"
CustomDrawButtonBase::CustomDrawButtonBase(GtkThemeProvider* theme_provider,
int normal_id, int active_id, int highlight_id, int depressed_id)
: paint_override_(-1),
normal_id_(normal_id),
active_id_(active_id),
highlight_id_(highlight_id),
depressed_id_(depressed_id),
theme_provider_(theme_provider) {
if (theme_provider) {
// Load images by pretending that we got a BROWSER_THEME_CHANGED
// notification.
theme_provider->InitThemesFor(this);
registrar_.Add(this,
NotificationType::BROWSER_THEME_CHANGED,
NotificationService::AllSources());
} else {
// Load the button images from the resource bundle.
ResourceBundle& rb = ResourceBundle::GetSharedInstance();
pixbufs_[GTK_STATE_NORMAL] =
normal_id ? rb.GetRTLEnabledPixbufNamed(normal_id) : NULL;
pixbufs_[GTK_STATE_ACTIVE] =
active_id ? rb.GetRTLEnabledPixbufNamed(active_id) : NULL;
pixbufs_[GTK_STATE_PRELIGHT] =
highlight_id ? rb.GetRTLEnabledPixbufNamed(highlight_id) : NULL;
pixbufs_[GTK_STATE_SELECTED] = NULL;
pixbufs_[GTK_STATE_INSENSITIVE] =
depressed_id ? rb.GetRTLEnabledPixbufNamed(depressed_id) : NULL;
}
}
CustomDrawButtonBase::~CustomDrawButtonBase() {
}
gboolean CustomDrawButtonBase::OnExpose(GtkWidget* widget, GdkEventExpose* e) {
GdkPixbuf* pixbuf = pixbufs_[paint_override_ >= 0 ?
paint_override_ : GTK_WIDGET_STATE(widget)];
// Fall back to the default image if we don't have one for this state.
if (!pixbuf)
pixbuf = pixbufs_[GTK_STATE_NORMAL];
if (!pixbuf)
return FALSE;
cairo_t* cairo_context = gdk_cairo_create(GDK_DRAWABLE(widget->window));
cairo_translate(cairo_context, widget->allocation.x, widget->allocation.y);
// The widget might be larger than the pixbuf. Paint the pixbuf flush with the
// start of the widget (left for LTR, right for RTL).
int pixbuf_width = gdk_pixbuf_get_width(pixbuf);
int widget_width = widget->allocation.width;
int x = gtk_widget_get_direction(widget) == GTK_TEXT_DIR_RTL ?
widget_width - pixbuf_width : 0;
gdk_cairo_set_source_pixbuf(cairo_context, pixbuf, x, 0);
cairo_paint(cairo_context);
cairo_destroy(cairo_context);
return TRUE;
}
void CustomDrawButtonBase::Observe(NotificationType type,
const NotificationSource& source, const NotificationDetails& details) {
DCHECK(theme_provider_);
DCHECK(NotificationType::BROWSER_THEME_CHANGED == type);
// TODO(tc): Add GetRTLEnabledPixbufNamed to ThemeProviderGtk.
pixbufs_[GTK_STATE_NORMAL] =
normal_id_ ? theme_provider_->GetPixbufNamed(normal_id_) : NULL;
pixbufs_[GTK_STATE_ACTIVE] =
active_id_ ? theme_provider_->GetPixbufNamed(active_id_) : NULL;
pixbufs_[GTK_STATE_PRELIGHT] =
highlight_id_ ? theme_provider_->GetPixbufNamed(highlight_id_) : NULL;
pixbufs_[GTK_STATE_SELECTED] = NULL;
pixbufs_[GTK_STATE_INSENSITIVE] =
depressed_id_ ? theme_provider_->GetPixbufNamed(depressed_id_) : NULL;
}
CustomDrawButton::CustomDrawButton(int normal_id, int active_id,
int highlight_id, int depressed_id, const char* stock_id)
: button_base_(NULL, normal_id, active_id, highlight_id, depressed_id),
gtk_stock_name_(stock_id),
has_expose_signal_handler_(false) {
Init();
// Initialize the theme stuff with no theme_provider.
SetBrowserTheme(NULL);
}
CustomDrawButton::CustomDrawButton(GtkThemeProvider* theme_provider,
int normal_id, int active_id, int highlight_id, int depressed_id,
const char* stock_id)
: button_base_(theme_provider, normal_id, active_id, highlight_id,
depressed_id),
gtk_stock_name_(stock_id),
has_expose_signal_handler_(false) {
Init();
theme_provider->InitThemesFor(this);
registrar_.Add(this,
NotificationType::BROWSER_THEME_CHANGED,
NotificationService::AllSources());
}
CustomDrawButton::~CustomDrawButton() {
widget_.Destroy();
}
void CustomDrawButton::Init() {
widget_.Own(gtk_button_new());
GTK_WIDGET_UNSET_FLAGS(widget_.get(), GTK_CAN_FOCUS);
}
void CustomDrawButton::Observe(NotificationType type,
const NotificationSource& source, const NotificationDetails& details) {
DCHECK(NotificationType::BROWSER_THEME_CHANGED == type);
GtkThemeProvider* provider = static_cast<GtkThemeProvider*>(
Source<GtkThemeProvider>(source).ptr());
SetBrowserTheme(provider);
}
void CustomDrawButton::SetPaintOverride(GtkStateType state) {
button_base_.set_paint_override(state);
gtk_widget_queue_draw(widget_.get());
}
void CustomDrawButton::UnsetPaintOverride() {
button_base_.set_paint_override(-1);
gtk_widget_queue_draw(widget_.get());
}
// static
gboolean CustomDrawButton::OnCustomExpose(GtkWidget* widget,
GdkEventExpose* e,
CustomDrawButton* button) {
return button->button_base_.OnExpose(widget, e);
}
// static
CustomDrawButton* CustomDrawButton::CloseButton() {
CustomDrawButton* button =
new CustomDrawButton(IDR_CLOSE_BAR, IDR_CLOSE_BAR_P,
IDR_CLOSE_BAR_H, 0, NULL);
return button;
}
void CustomDrawButton::SetBrowserTheme(GtkThemeProvider* theme_provider) {
if (theme_provider && theme_provider->UseGtkTheme() && gtk_stock_name_) {
gtk_button_set_image(
GTK_BUTTON(widget_.get()),
gtk_image_new_from_stock(gtk_stock_name_, GTK_ICON_SIZE_BUTTON));
gtk_widget_set_size_request(widget_.get(), -1, -1);
gtk_widget_set_app_paintable(widget_.get(), FALSE);
gtk_widget_set_double_buffered(widget_.get(), TRUE);
if (has_expose_signal_handler_)
gtk_signal_disconnect_by_data(GTK_OBJECT(widget_.get()), this);
has_expose_signal_handler_ = false;
} else {
gtk_widget_set_size_request(widget_.get(),
gdk_pixbuf_get_width(button_base_.pixbufs(0)),
gdk_pixbuf_get_height(button_base_.pixbufs(0)));
gtk_widget_set_app_paintable(widget_.get(), TRUE);
// We effectively double-buffer by virtue of having only one image...
gtk_widget_set_double_buffered(widget_.get(), FALSE);
g_signal_connect(G_OBJECT(widget_.get()), "expose-event",
G_CALLBACK(OnCustomExpose), this);
has_expose_signal_handler_ = true;
}
}
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