Implement learn more bubble on views.

chrome/browser/ui/views/autofill/tooltip_icon.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/ui/views/autofill/tooltip_icon.h"
 
+#include "base/basictypes.h"
+#include "base/timer/timer.h"
+#include "chrome/browser/ui/views/autofill/info_bubble.h"
 #include "grit/theme_resources.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/views/bubble/bubble_frame_view.h"
 
-TooltipIcon::TooltipIcon(const base::string16& tooltip) : tooltip_(tooltip) {
-  SetImage(ui::ResourceBundle::GetSharedInstance().GetImageNamed(
-      IDR_AUTOFILL_TOOLTIP_ICON).ToImageSkia());
+namespace autofill {
+
+namespace {
+
+// An info bubble with some extra positioning magic for tooltip icons.
+class TooltipBubble : public InfoBubble {
+ public:
+  TooltipBubble(views::View* anchor, const base::string16& message)
+      : InfoBubble(anchor, message) {}
+  virtual ~TooltipBubble() {}
+
+ protected:
+  // InfoBubble:
+  virtual gfx::Rect GetAnchorRect() OVERRIDE {
+    gfx::Size pref_size = anchor()->GetPreferredSize();
+    gfx::Point origin = anchor()->GetBoundsInScreen().CenterPoint();
+    origin.Offset(-pref_size.width() / 2, -pref_size.height() / 2);
+    return gfx::Rect(origin, pref_size);
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TooltipBubble);
+};
+
+}  // namespace
+
+TooltipIcon::TooltipIcon(const base::string16& tooltip)
+    : tooltip_(tooltip),
+      bubble_(NULL) {
+  ChangeImageTo(IDR_AUTOFILL_TOOLTIP_ICON);
 }
 
-TooltipIcon::~TooltipIcon() {}
+TooltipIcon::~TooltipIcon() {
+  HideBubble();
+}
 
-bool TooltipIcon::GetTooltipText(const gfx::Point& p,
-                                 base::string16* tooltip) const {
-  *tooltip = tooltip_;
-  return !tooltip_.empty();
+// static
+const char TooltipIcon::kViewClassName[] = "autofill/TooltipIcon";
+
+const char* TooltipIcon::GetClassName() const {
+  return TooltipIcon::kViewClassName;
 }
+
+void TooltipIcon::OnMouseEntered(const ui::MouseEvent& event) {
+  ChangeImageTo(IDR_AUTOFILL_TOOLTIP_ICON_H);
+  ShowBubble();
+}
+
+void TooltipIcon::OnMouseExited(const ui::MouseEvent& event) {
+  ChangeImageTo(IDR_AUTOFILL_TOOLTIP_ICON);
+  hide_timer_.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(250), this,
+                    &TooltipIcon::HideBubble);
+}
+
+void TooltipIcon::ChangeImageTo(int idr) {
+  ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
+  SetImage(rb.GetImageNamed(idr).ToImageSkia());
+}
+
+void TooltipIcon::ShowBubble() {
+  if (bubble_) {
+    hide_timer_.Stop();
+  } else {
+    bubble_ = new TooltipBubble(this, tooltip_);
+    bubble_->Show();
+  }
+}
+
+void TooltipIcon::HideBubble() {
+  if (bubble_) {
+    bubble_->Hide();
+    bubble_ = NULL;
+  }
+}
+
+}  // namespace autofill