Implements a zoom icon in the Omnibox for Views.

chrome/browser/ui/views/location_bar/zoom_bubble_view.cc

+// Copyright (c) 2012 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/ui/views/location_bar/zoom_bubble_view.h"
+
+#include "base/bind.h"
+#include "base/message_loop.h"
+#include "grit/generated_resources.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/views/layout/fill_layout.h"
+
+namespace {
+
+// The number of milliseconds the bubble should stay on the screen for if it
+// will autoclose.
+const int kBubbleCloseDelay = 400;
+
+}
+
+// Singleton instance.
+ZoomBubbleView* ZoomBubbleView::zoom_bubble_ = NULL;
+
+// Declared in browser_dialogs.h..
+namespace browser {
+
+void ShowZoomBubbleView(views::View* anchor_view,
+                        int zoom_percent,
+                        bool autoclose) {
+  ZoomBubbleView::ShowBubble(anchor_view, zoom_percent, autoclose);
+}
+
+void HideZoomBubbleView() {
+  ZoomBubbleView::CloseBubble();
+}
+
+bool IsZoomBubbleViewShowing() {
+  return ZoomBubbleView::IsShowing();
+}
+
+}
+
+// static
+void ZoomBubbleView::ShowBubble(views::View* anchor_view,
+                                int zoom_percent,
+                                bool autoclose) {
+  if (IsShowing())
+    CloseBubble();
+
+  zoom_bubble_ = new ZoomBubbleView(anchor_view, zoom_percent, autoclose);
+  views::BubbleDelegateView::CreateBubble(zoom_bubble_);
+  zoom_bubble_->Show();
+}
+
+// static
+void ZoomBubbleView::CloseBubble() {
+  if (IsShowing())
+    zoom_bubble_->Close();
+}
+
+// static
+bool ZoomBubbleView::IsShowing() {
+  return zoom_bubble_ != NULL;
+}
+
+void ZoomBubbleView::WindowClosing() {
+  DCHECK(zoom_bubble_ == this);
+  zoom_bubble_ = NULL;
+}
+
+void ZoomBubbleView::Init() {
+  SetLayoutManager(new views::FillLayout());
+  zoom_percent_label_ = new views::Label(
+      l10n_util::GetStringFUTF16Int(IDS_ZOOM_PERCENT, zoom_percent_));
+  AddChildView(zoom_percent_label_);
+
+  if (autoclose_)
+    MessageLoop::current()->PostDelayedTask(
+        FROM_HERE,
+        base::Bind(&ZoomBubbleView::Close, factory_.GetWeakPtr()),
+        kBubbleCloseDelay);
+}
+
+ZoomBubbleView::ZoomBubbleView(views::View* anchor_view,
+                               int zoom_percent,
+                               bool autoclose)
+  : BubbleDelegateView(anchor_view, views::BubbleBorder::TOP_RIGHT),
+    ALLOW_THIS_IN_INITIALIZER_LIST(factory_(this)),
+    zoom_percent_(zoom_percent),
+    autoclose_(autoclose),
+    zoom_percent_label_(NULL) {
+  set_use_focusless(autoclose);
+}
+
+ZoomBubbleView::~ZoomBubbleView() {
+}
+
+void ZoomBubbleView::Close() {
+  GetWidget()->Close();
+}