Activate the currently selected process when the user double clicks the task manager treeview.

BUG=11392
TEST=Open the task manager and double click different processes.  Those tabs should be activated.
Review URL: http://codereview.chromium.org/155098

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@19980 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/gtk/task_manager_gtk.cc

@@ -59,7 +59,6 @@ TaskManagerColumn TaskManagerResourceIDToColumnID(int id) {
 }
 
 int TaskManagerColumnIDToResourceID(int id) {
-  printf("id: %d\n", id);
   switch (id) {
     case kTaskManagerPage:
       return IDS_TASK_MANAGER_PAGE_COLUMN;
@@ -326,6 +325,8 @@ void TaskManagerGtk::Init() {
   gtk_tree_view_set_headers_clickable(GTK_TREE_VIEW(treeview_), TRUE);
   gtk_tree_view_set_grid_lines(GTK_TREE_VIEW(treeview_),
                                GTK_TREE_VIEW_GRID_LINES_HORIZONTAL);
+  g_signal_connect(G_OBJECT(treeview_), "button-press-event",
+                   G_CALLBACK(OnButtonPressEvent), this);
   g_signal_connect(G_OBJECT(treeview_), "button-release-event",
                    G_CALLBACK(OnButtonReleaseEvent), this);
   gtk_widget_add_events(treeview_,
@@ -468,6 +469,17 @@ void TaskManagerGtk::ShowContextMenu() {
   menu_controller_->RunMenu();
 }
 
+void TaskManagerGtk::ActivateFocusedTab() {
+  GtkTreeSelection* selection = gtk_tree_view_get_selection(
+      GTK_TREE_VIEW(treeview_));
+
+  // If the user has just double clicked, only one item is selected.
+  GtkTreeModel* model;
+  GList* selected = gtk_tree_selection_get_selected_rows(selection, &model);
+  int row = GetRowNumForPath(reinterpret_cast<GtkTreePath*>(selected->data));
+  task_manager_->ActivateProcess(row);
+}
+
 // static
 void TaskManagerGtk::OnResponse(GtkDialog* dialog, gint response_id,
                                 TaskManagerGtk* task_manager) {
@@ -500,6 +512,16 @@ void TaskManagerGtk::OnSelectionChanged(GtkTreeSelection* selection,
                                     kTaskManagerResponseKill, sensitive);
 }
 
+// static
+gboolean TaskManagerGtk::OnButtonPressEvent(GtkWidget* widget,
+                                            GdkEventButton* event,
+                                            TaskManagerGtk* task_manager) {
+  if (event->type == GDK_2BUTTON_PRESS)
+    task_manager->ActivateFocusedTab();
+
+  return FALSE;
+}
+
 // static
 gboolean TaskManagerGtk::OnButtonReleaseEvent(GtkWidget* widget,
                                               GdkEventButton* event,

chrome/browser/gtk/task_manager_gtk.h

@@ -52,6 +52,9 @@ class TaskManagerGtk : public TaskManagerModelObserver {
   // Opens the context menu used to select the task manager columns.
   void ShowContextMenu();
 
+  // Activates the tab associated with the focused row.
+  void ActivateFocusedTab();
+
   // response signal handler that notifies us of dialog responses.
   static void OnResponse(GtkDialog* dialog, gint response_id,
                          TaskManagerGtk* task_manager);
@@ -60,6 +63,10 @@ class TaskManagerGtk : public TaskManagerModelObserver {
   static void OnSelectionChanged(GtkTreeSelection* selection,
                                  TaskManagerGtk* task_manager);
 
+  // button-press-event handler that activates a process on double-click.
+  static gboolean OnButtonPressEvent(GtkWidget* widget, GdkEventButton* event,
+                                     TaskManagerGtk* task_manager);
+
   // button-release-event handler that opens the right-click context menu.
   static gboolean OnButtonReleaseEvent(GtkWidget* widget, GdkEventButton* event,
                                        TaskManagerGtk* task_manager);