Implements a zoom icon in the Omnibox for Views.

chrome/browser/ui/views/location_bar/zoom_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_view.h"
+
+#include "chrome/browser/ui/views/browser_dialogs.h"
+#include "chrome/browser/ui/views/location_bar/zoom_bubble_view.h"
+#include "chrome/browser/ui/view_ids.h"
+#include "grit/generated_resources.h"
+#include "grit/theme_resources_standard.h"
+#include "ui/base/accessibility/accessible_view_state.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/resource/resource_bundle.h"
+
+ZoomView::ZoomView()
+    // Initially set the icon state to the plus icon even if it should be
+    // something else so that the location bar's layout can account for the
+    // width needed to display it.
+    : zoom_icon_state_(ZoomController::ZOOM_PLUS_ICON),
+      zoom_percent_(100) {
+  set_id(VIEW_ID_ZOOM_BUTTON);
+  set_accessibility_focusable(true);
+
+  Update();
+}
+
+ZoomView::~ZoomView() {
+}
+
+void ZoomView::SetZoomIconState(ZoomController::ZoomIconState zoom_icon_state) {
+  if (zoom_icon_state == zoom_icon_state_)
+    return;
+
+  zoom_icon_state_ = zoom_icon_state;
+  Update();
+}
+
+void ZoomView::SetZoomIconTooltipPercent(int zoom_percent) {
+  if (zoom_percent == zoom_percent_)
+    return;
+
+  zoom_percent_ = zoom_percent;
+  Update();
+}
+
+void ZoomView::Update() {
+  switch (zoom_icon_state_) {
+    case ZoomController::NONE:
+      SetVisible(false);
+      browser::HideZoomBubbleView();
+      break;
+    case ZoomController::ZOOM_PLUS_ICON:
+      SetVisible(true);
+      SetTooltipText(
+          l10n_util::GetStringFUTF16Int(IDS_TOOLTIP_ZOOM, zoom_percent_));
+      SetImage(ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
+          IDR_ZOOM_PLUS));
+      break;
+    case ZoomController::ZOOM_MINUS_ICON:
+      SetVisible(true);
+      SetTooltipText(
+          l10n_util::GetStringFUTF16Int(IDS_TOOLTIP_ZOOM, zoom_percent_));
+      SetImage(ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
+          IDR_ZOOM_MINUS));
+      break;
+    default:
+      NOTREACHED();
+  }
+}
+
+void ZoomView::GetAccessibleState(ui::AccessibleViewState* state) {
+  state->name = l10n_util::GetStringUTF16(IDS_ACCNAME_ZOOM);
+  state->role = ui::AccessibilityTypes::ROLE_PUSHBUTTON;
+}
+
+bool ZoomView::GetTooltipText(const gfx::Point& p, string16* tooltip) const {
+  // Don't show tooltip if the zoom bubble is displayed.
+  if (browser::IsZoomBubbleViewShowing())
+    return false;
+
+  return ImageView::GetTooltipText(p, tooltip);
+}
+
+bool ZoomView::OnMousePressed(const views::MouseEvent& event) {
+  // Do nothing until mouse is released.
+  return true;
+}
+
+void ZoomView::OnMouseReleased(const views::MouseEvent& event) {
+  if (event.IsOnlyLeftMouseButton() && HitTest(event.location()))
+    browser::ShowZoomBubbleView(this, zoom_percent_, false);
+}
+
+bool ZoomView::OnKeyPressed(const views::KeyEvent& event) {
+  if (event.key_code() == ui::VKEY_SPACE ||
+      event.key_code() == ui::VKEY_RETURN) {
+    browser::ShowZoomBubbleView(this, zoom_percent_, false);
+    return true;
+  }
+  return false;
+}