Add double click and tap handler to minimize attached panels.

BUG=246603
TEST=Open a panel (i.e. hangouts) and double click and tap on header. Panel should minimize.

Review URL: https://chromiumcodereview.appspot.com/17175019

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@207949 0039d316-1c4b-4281-b951-d872f2087c98

ash/ash.gyp

@@ -412,6 +412,8 @@
         'wm/panels/panel_frame_view.h',
         'wm/panels/panel_layout_manager.cc',
         'wm/panels/panel_layout_manager.h',
+        'wm/panels/panel_window_event_handler.cc',
+        'wm/panels/panel_window_event_handler.h',
         'wm/panels/panel_window_resizer.cc',
         'wm/panels/panel_window_resizer.h',
         'wm/partial_screenshot_view.cc',

ash/root_window_controller.cc

@@ -27,6 +27,7 @@
 #include "ash/wm/boot_splash_screen.h"
 #include "ash/wm/dock/docked_window_layout_manager.h"
 #include "ash/wm/panels/panel_layout_manager.h"
+#include "ash/wm/panels/panel_window_event_handler.h"
 #include "ash/wm/property_util.h"
 #include "ash/wm/root_window_layout_manager.h"
 #include "ash/wm/screen_dimmer.h"
@@ -289,7 +290,7 @@ void RootWindowController::InitForPrimaryDisplay() {
   panel_layout_manager_ =
       new internal::PanelLayoutManager(panel_container);
   panel_container_handler_.reset(
-      new ToplevelWindowEventHandler(panel_container));
+      new PanelWindowEventHandler(panel_container));
   panel_container->SetLayoutManager(panel_layout_manager_);
 
   // TODO(stevenjb/oshima): Remove this call to CreateLauncher() and call

ash/wm/panels/panel_window_event_handler.cc

+// Copyright 2013 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 "ash/wm/panels/panel_window_event_handler.h"
+
+#include "ui/aura/client/aura_constants.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_delegate.h"
+#include "ui/base/events/event.h"
+#include "ui/base/hit_test.h"
+
+namespace ash {
+namespace internal {
+
+PanelWindowEventHandler::PanelWindowEventHandler(aura::Window* owner)
+    : ToplevelWindowEventHandler(owner) {
+}
+
+PanelWindowEventHandler::~PanelWindowEventHandler() {
+}
+
+void PanelWindowEventHandler::OnMouseEvent(ui::MouseEvent* event) {
+  aura::Window* target = static_cast<aura::Window*>(event->target());
+  if (event->type() == ui::ET_MOUSE_PRESSED &&
+      event->flags() & ui::EF_IS_DOUBLE_CLICK &&
+      target->delegate()->GetNonClientComponent(event->location()) ==
+          HTCAPTION) {
+    target->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MINIMIZED);
+    return;
+  }
+  ToplevelWindowEventHandler::OnMouseEvent(event);
+}
+
+void PanelWindowEventHandler::OnGestureEvent(ui::GestureEvent* event) {
+  aura::Window* target = static_cast<aura::Window*>(event->target());
+  if (event->type() == ui::ET_GESTURE_TAP &&
+      event->details().tap_count() == 2 &&
+      target->delegate()->GetNonClientComponent(event->location()) ==
+          HTCAPTION) {
+    target->SetProperty(aura::client::kShowStateKey, ui::SHOW_STATE_MINIMIZED);
+    event->StopPropagation();
+    return;
+  }
+  ToplevelWindowEventHandler::OnGestureEvent(event);
+}
+
+}  // namespace internal
+}  // namespace ash

ash/wm/panels/panel_window_event_handler.h

+// Copyright 2013 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 ASH_WM_PANELS_PANEL_WINDOW_EVENT_HANDLER_H_
+#define ASH_WM_PANELS_PANEL_WINDOW_EVENT_HANDLER_H_
+
+#include "ash/wm/toplevel_window_event_handler.h"
+
+namespace aura {
+class Window;
+}
+
+namespace ash {
+namespace internal {
+
+// PanelWindowEventHandler minimizes panels when the user double clicks or
+// double taps on the panel header.
+class PanelWindowEventHandler : public ToplevelWindowEventHandler {
+ public:
+  explicit PanelWindowEventHandler(aura::Window* owner);
+  virtual ~PanelWindowEventHandler();
+
+  // TopLevelWindowEventHandler:
+  virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(PanelWindowEventHandler);
+};
+
+}  // namespace internal
+}  // namespace ash
+
+#endif  // ASH_WM_PANELS_PANEL_WINDOW_EVENT_HANDLER_H_