Status Panel Touch Feedback

ash/system/tray/tray_popup_item_container.cc

+// Copyright (c) 2014 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/system/tray/tray_popup_item_container.h"
+
+#include "ash/system/tray/tray_constants.h"
+#include "base/command_line.h"
+#include "ui/base/ui_base_switches_util.h"
+#include "ui/gfx/canvas.h"
+#include "ui/views/border.h"
+#include "ui/views/layout/box_layout.h"
+
+namespace ash {
+
+TrayPopupItemContainer::TrayPopupItemContainer(views::View* view,
+                                               bool change_background,
+                                               bool draw_border)
+    : active_(false),
+      change_background_(change_background) {
+  set_notify_enter_exit_on_child(true);
+  if (draw_border) {
+    SetBorder(
+        views::Border::CreateSolidSidedBorder(0, 0, 1, 0, kBorderLightColor));
+  }
+  views::BoxLayout* layout = new views::BoxLayout(
+      views::BoxLayout::kVertical, 0, 0, 0);
+  layout->SetDefaultFlex(1);
+  SetLayoutManager(layout);
+  SetPaintToLayer(view->layer() != NULL);
+  if (view->layer())
+    SetFillsBoundsOpaquely(view->layer()->fills_bounds_opaquely());
+  AddChildView(view);
+  SetVisible(view->visible());
+}
+
+TrayPopupItemContainer::~TrayPopupItemContainer() {
+}
+
+void TrayPopupItemContainer::SetActive(bool active) {
+  if (!change_background_ || active_ == active)
+    return;
+  active_ = active;
+  SchedulePaint();
+}
+
+void TrayPopupItemContainer::ChildVisibilityChanged(View* child) {
+  if (visible() == child->visible())
+    return;
+  SetVisible(child->visible());
+  PreferredSizeChanged();
+}
+
+void TrayPopupItemContainer::ChildPreferredSizeChanged(View* child) {
+  PreferredSizeChanged();
+}
+
+void TrayPopupItemContainer::OnMouseEntered(const ui::MouseEvent& event) {
+  SetActive(true);
+}
+
+void TrayPopupItemContainer::OnMouseExited(const ui::MouseEvent& event) {
+  SetActive(false);
+}
+
+void TrayPopupItemContainer::OnGestureEvent(ui::GestureEvent* event) {
+  if (!switches::IsTouchFeedbackEnabled())
+    return;
+  if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
+    SetActive(true);
+  } else if (event->type() == ui::ET_GESTURE_TAP_CANCEL ||
+             event->type() == ui::ET_GESTURE_TAP) {
+    SetActive(false);
+  }
+}
+
+void TrayPopupItemContainer::OnPaintBackground(gfx::Canvas* canvas) {
+  if (child_count() == 0)
+    return;
+
+  views::View* view = child_at(0);
+  if (!view->background()) {
+    canvas->FillRect(gfx::Rect(size()), (active_) ? kHoverBackgroundColor
+                                                  : kBackgroundColor);
+  }
+}
+
+}  // namespace ash