Fleshes out the tooltip implementation for views on Gtk. It doesn't...

views/widget/widget_gtk.cc

 // 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 "views/widget/widget_gtk.h"
 
 #include "app/drag_drop_types.h"
 #include "app/gfx/path.h"
 #include "app/os_exchange_data.h"
 #include "app/os_exchange_data_provider_gtk.h"
@@ skipping 269 matching lines @@
                    G_CALLBACK(CallDragLeave), this);
   g_signal_connect(G_OBJECT(window_contents_), "drag_data_get",
                    G_CALLBACK(CallDragDataGet), this);
   g_signal_connect(G_OBJECT(window_contents_), "drag_end",
                    G_CALLBACK(CallDragEnd), this);
   g_signal_connect(G_OBJECT(window_contents_), "drag_failed",
                    G_CALLBACK(CallDragFailed), this);
 
   tooltip_manager_.reset(new TooltipManagerGtk(this));
 
+  // Register for tooltips.
+  g_object_set(G_OBJECT(window_contents_), "has-tooltip", TRUE, NULL);
+  g_signal_connect(G_OBJECT(window_contents_), "query_tooltip",
+                   G_CALLBACK(CallQueryTooltip), this);
+
   if (type_ == TYPE_CHILD) {
     if (parent) {
       WidgetGtk* parent_widget = GetViewForNative(parent);
       parent_widget->AddChild(widget_);
       parent_widget->PositionChild(widget_, bounds.x(), bounds.y(),
                                    bounds.width(), bounds.height());
     }
   } else {
     if (bounds.width() > 0 && bounds.height() > 0)
       gtk_window_resize(GTK_WINDOW(widget_), bounds.width(), bounds.height());
@@ skipping 361 matching lines @@
 }
 
 gboolean WidgetGtk::OnEnterNotify(GtkWidget* widget, GdkEventCrossing* event) {
   return false;
 }
 
 gboolean WidgetGtk::OnLeaveNotify(GtkWidget* widget, GdkEventCrossing* event) {
   last_mouse_event_was_move_ = false;
   if (!has_capture_ && !is_mouse_down_)
     root_view_->ProcessOnMouseExited();
-  return true;
+  return false;
 }
 
 gboolean WidgetGtk::OnKeyPress(GtkWidget* widget, GdkEventKey* event) {
   KeyEvent key_event(event, false);
   return root_view_->ProcessKeyEvent(key_event);
 }
 
 gboolean WidgetGtk::OnKeyRelease(GtkWidget* widget, GdkEventKey* event) {
   KeyEvent key_event(event, false);
   return root_view_->ProcessKeyEvent(key_event);
 }
 
+gboolean WidgetGtk::OnQueryTooltip(gint x,
+                                   gint y,
+                                   gboolean keyboard_mode,
+                                   GtkTooltip* tooltip) {
+  return tooltip_manager_->ShowTooltip(x, y, keyboard_mode, tooltip);
+}
+
 gboolean WidgetGtk::OnGrabBrokeEvent(GtkWidget* widget, GdkEvent* event) {
   HandleGrabBroke();
   return false;  // To let other widgets get the event.
 }
 
 void WidgetGtk::OnGrabNotify(GtkWidget* widget, gboolean was_grabbed) {
   gtk_grab_remove(window_contents_);
   HandleGrabBroke();
 }
 
@@ skipping 271 matching lines @@
 }
 
 gboolean WidgetGtk::CallKeyRelease(GtkWidget* widget, GdkEventKey* event) {
   WidgetGtk* widget_gtk = GetViewForNative(widget);
   if (!widget_gtk)
     return false;
 
   return widget_gtk->OnKeyRelease(widget, event);
 }
 
+// static
+gboolean WidgetGtk::CallQueryTooltip(GtkWidget* widget,
+                                     gint x,
+                                     gint y,
+                                     gboolean keyboard_mode,
+                                     GtkTooltip* tooltip,
+                                     WidgetGtk* host) {
+  return host->OnQueryTooltip(x, y, keyboard_mode, tooltip);
+}
+
 gboolean WidgetGtk::CallScroll(GtkWidget* widget, GdkEventScroll* event) {
   WidgetGtk* widget_gtk = GetViewForNative(widget);
   if (!widget_gtk)
     return false;
 
   return widget_gtk->OnScroll(widget, event);
 }
 
 gboolean WidgetGtk::CallVisibilityNotify(GtkWidget* widget,
                                          GdkEventVisibility* event) {
@@ skipping 86 matching lines @@
 
 // static
 Widget* Widget::CreateTransparentPopupWidget(bool delete_on_destroy) {
   WidgetGtk* popup = new WidgetGtk(WidgetGtk::TYPE_POPUP);
   popup->set_delete_on_destroy(delete_on_destroy);
   popup->MakeTransparent();
   return popup;
 }
 
 }  // namespace views