src/chrome/browser/ui/gtk/back_forward_button_gtk.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/gtk/back_forward_button_gtk.h"
   6
   7 #include <gtk/gtk.h>
   8
   9 #include "base/bind.h"
  10 #include "base/message_loop/message_loop.h"
  11 #include "chrome/app/chrome_command_ids.h"
  12 #include "chrome/browser/profiles/profile.h"
  13 #include "chrome/browser/ui/browser.h"
  14 #include "chrome/browser/ui/browser_commands.h"
  15 #include "chrome/browser/ui/gtk/event_utils.h"
  16 #include "chrome/browser/ui/gtk/gtk_theme_service.h"
  17 #include "chrome/browser/ui/gtk/gtk_util.h"
  18 #include "chrome/browser/ui/gtk/menu_gtk.h"
  19 #include "chrome/browser/ui/toolbar/back_forward_menu_model.h"
  20 #include "grit/generated_resources.h"
  21 #include "grit/theme_resources.h"
  22 #include "ui/base/l10n/l10n_util.h"
  23
  24 // The time in milliseconds between when the user clicks and the menu appears.
  25 static const int kMenuTimerDelay = 500;
  26
  27 BackForwardButtonGtk::BackForwardButtonGtk(Browser* browser, bool is_forward)
  28     : browser_(browser),
  29       is_forward_(is_forward),
  30       weak_factory_(this) {
  31   int normal, pushed, hover, disabled, tooltip;
  32   const char* stock;
  33   if (is_forward) {
  34     normal = IDR_FORWARD;
  35     pushed = IDR_FORWARD_P;
  36     hover = IDR_FORWARD_H;
  37     disabled = IDR_FORWARD_D;
  38     tooltip = IDS_TOOLTIP_FORWARD;
  39     stock = GTK_STOCK_GO_FORWARD;
  40   } else {
  41     normal = IDR_BACK;
  42     pushed = IDR_BACK_P;
  43     hover = IDR_BACK_H;
  44     disabled = IDR_BACK_D;
  45     tooltip = IDS_TOOLTIP_BACK;
  46     stock = GTK_STOCK_GO_BACK;
  47   }
  48   button_.reset(new CustomDrawButton(
  49       GtkThemeService::GetFrom(browser_->profile()),
  50       normal, pushed, hover, disabled, stock, GTK_ICON_SIZE_SMALL_TOOLBAR));
  51   gtk_widget_set_tooltip_text(widget(),
  52                               l10n_util::GetStringUTF8(tooltip).c_str());
  53   menu_model_.reset(new BackForwardMenuModel(browser, is_forward ?
  54       BackForwardMenuModel::FORWARD_MENU :
  55       BackForwardMenuModel::BACKWARD_MENU));
  56
  57   g_signal_connect(widget(), "clicked",
  58                    G_CALLBACK(OnClickThunk), this);
  59   g_signal_connect(widget(), "button-press-event",
  60                    G_CALLBACK(OnButtonPressThunk), this);
  61   gtk_widget_add_events(widget(), GDK_POINTER_MOTION_MASK);
  62   g_signal_connect(widget(), "motion-notify-event",
  63                    G_CALLBACK(OnMouseMoveThunk), this);
  64
  65   // Popup the menu as left-aligned relative to this widget rather than the
  66   // default of right aligned.
  67   g_object_set_data(G_OBJECT(widget()), "left-align-popup",
  68                     reinterpret_cast<void*>(true));
  69
  70   gtk_util::SetButtonTriggersNavigation(widget());
  71 }
  72
  73 BackForwardButtonGtk::~BackForwardButtonGtk() {
  74 }
  75
  76 void BackForwardButtonGtk::StoppedShowing() {
  77   button_->UnsetPaintOverride();
  78 }
  79
  80 bool BackForwardButtonGtk::AlwaysShowIconForCmd(int command_id) const {
  81   return true;
  82 }
  83
  84 void BackForwardButtonGtk::ShowBackForwardMenu(int button, guint32 event_time) {
  85   menu_.reset(new MenuGtk(this, menu_model_.get()));
  86   button_->SetPaintOverride(GTK_STATE_ACTIVE);
  87   menu_->PopupForWidget(widget(), button, event_time);
  88 }
  89
  90 void BackForwardButtonGtk::OnClick(GtkWidget* widget) {
  91   weak_factory_.InvalidateWeakPtrs();
  92
  93   chrome::ExecuteCommandWithDisposition(
  94       browser_,
  95       is_forward_ ? IDC_FORWARD : IDC_BACK,
  96       event_utils::DispositionForCurrentButtonPressEvent());
  97 }
  98
  99 gboolean BackForwardButtonGtk::OnButtonPress(GtkWidget* widget,
 100                                              GdkEventButton* event) {
 101   if (event->button == 3)
 102     ShowBackForwardMenu(event->button, event->time);
 103
 104   if (event->button != 1)
 105     return FALSE;
 106
 107   y_position_of_last_press_ = static_cast<int>(event->y);
 108   base::MessageLoop::current()->PostDelayedTask(
 109       FROM_HERE,
 110       base::Bind(&BackForwardButtonGtk::ShowBackForwardMenu,
 111                  weak_factory_.GetWeakPtr(),
 112                  event->button,
 113                  event->time),
 114       base::TimeDelta::FromMilliseconds(kMenuTimerDelay));
 115   return FALSE;
 116 }
 117
 118 gboolean BackForwardButtonGtk::OnMouseMove(GtkWidget* widget,
 119                                            GdkEventMotion* event) {
 120   // If we aren't waiting to show the back forward menu, do nothing.
 121   if (!weak_factory_.HasWeakPtrs())
 122     return FALSE;
 123
 124   // We only count moves about a certain threshold.
 125   GtkSettings* settings = gtk_widget_get_settings(widget);
 126   int drag_min_distance;
 127   g_object_get(settings, "gtk-dnd-drag-threshold", &drag_min_distance, NULL);
 128   if (event->y - y_position_of_last_press_ < drag_min_distance)
 129     return FALSE;
 130
 131   // We will show the menu now. Cancel the delayed event.
 132   weak_factory_.InvalidateWeakPtrs();
 133   ShowBackForwardMenu(/* button */ 1, event->time);
 134   return FALSE;
 135 }