Handle tap gestures in desktop media picker's source list

chrome/browser/ui/views/desktop_media_picker_views.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 "chrome/browser/media/desktop_media_picker.h"
 
 #include "base/callback.h"
 #include "chrome/browser/media/desktop_media_list.h"
 #include "chrome/browser/media/desktop_media_list_observer.h"
 #include "chrome/browser/ui/ash/ash_util.h"
 #include "components/web_modal/web_contents_modal_dialog_host.h"
 #include "components/web_modal/web_contents_modal_dialog_manager.h"
 #include "components/web_modal/web_contents_modal_dialog_manager_delegate.h"
 #include "content/public/browser/browser_thread.h"
 #include "grit/generated_resources.h"
 #include "ui/aura/window_tree_host.h"
 #include "ui/base/l10n/l10n_util.h"
+#include "ui/events/event_constants.h"
 #include "ui/events/keycodes/keyboard_codes.h"
 #include "ui/gfx/canvas.h"
 #include "ui/native_theme/native_theme.h"
 #include "ui/views/background.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/scroll_view.h"
 #include "ui/views/layout/box_layout.h"
 #include "ui/views/layout/layout_constants.h"
 #include "ui/views/widget/widget.h"
@@ skipping 62 matching lines @@
 
   // views::View interface.
   virtual const char* GetClassName() const OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual views::View* GetSelectedViewForGroup(int group) OVERRIDE;
   virtual bool IsGroupFocusTraversable() const OVERRIDE;
   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
   virtual void OnFocus() OVERRIDE;
   virtual void OnBlur() OVERRIDE;
   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
+  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
  private:
   DesktopMediaListView* parent_;
   DesktopMediaID source_id_;
 
   views::ImageView* image_view_;
   views::Label* label_;
 
   bool selected_;
 
@@ skipping 219 matching lines @@
 bool DesktopMediaSourceView::OnMousePressed(const ui::MouseEvent& event) {
   if (event.GetClickCount() == 1) {
     RequestFocus();
   } else if (event.GetClickCount() == 2) {
     RequestFocus();
     parent_->OnDoubleClick();
   }
   return true;
 }
 
+void DesktopMediaSourceView::OnGestureEvent(ui::GestureEvent* event) {
+  if (event->type() == ui::ET_GESTURE_TAP &&
+      event->details().tap_count() == 2) {
+    RequestFocus();
+    parent_->OnDoubleClick();
+    event->SetHandled();
+    return;
+  }
+
+  // Detect tap gesture using ET_GESTURE_TAP_DOWN so the view also gets focused
+  // on the long tap (when the tap gesture starts).
+  if (event->type() == ui::ET_GESTURE_TAP_DOWN) {
+    RequestFocus();
+    event->SetHandled();
+  }
+}
+
 DesktopMediaListView::DesktopMediaListView(
     DesktopMediaPickerDialogView* parent,
     scoped_ptr<DesktopMediaList> media_list)
     : parent_(parent),
       media_list_(media_list.Pass()) {
   media_list_->SetThumbnailSize(gfx::Size(kThumbnailWidth, kThumbnailHeight));
 }
 
 DesktopMediaListView::~DesktopMediaListView() {}
 
@@ skipping 329 matching lines @@
       base::Bind(callback_, source));
   callback_.Reset();
 }
 
 }  // namespace
 
 // static
 scoped_ptr<DesktopMediaPicker> DesktopMediaPicker::Create() {
   return scoped_ptr<DesktopMediaPicker>(new DesktopMediaPickerViews());
 }