Re-implement form validation message UI with native widgets (Views)

chrome/browser/ui/views/validation_message_bubble_delegate.cc

+// Copyright (c) 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/validation_message_bubble_delegate.h"
+
+#include "grit/theme_resources.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/views/controls/image_view.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/widget/widget.h"
+
+// static
+const int ValidationMessageBubbleDelegate::kWindowMinWidth = 64;
+// static
+const int ValidationMessageBubbleDelegate::kWindowMaxWidth = 256;
+static const int kPadding = 0;

[Nico, 2013/05/02 16:52:30]

fyi: const has implicit internal linkage, so there's no need to explicitly write
"static" before it (or put it in an unnamed namespace).

+static const int kIconTextMargin = 8;
+static const int kTextVerticalMargin = 4;
+
+ValidationMessageBubbleDelegate::ValidationMessageBubbleDelegate(
+    const gfx::Rect& anchor_in_screen,
+    const string16& main_text,
+    const string16& sub_text,
+    Observer* observer)
+    : observer_(observer), width_(0), height_(0) {
+  set_use_focusless(true);
+  set_arrow(views::BubbleBorder::TOP_LEFT);
+  set_anchor_rect(anchor_in_screen);
+
+  ResourceBundle& bundle = ResourceBundle::GetSharedInstance();
+  views::ImageView* icon = new views::ImageView();
+  icon->SetImage(*bundle.GetImageSkiaNamed(IDR_INPUT_ALERT));
+  gfx::Size size = icon->GetPreferredSize();
+  icon->SetBounds(kPadding, kPadding, size.width(), size.height());
+  AddChildView(icon);
+
+  views::Label* label = new views::Label(main_text);
+  label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
+  label->SetFont(bundle.GetFont(ResourceBundle::MediumFont));
+  label->set_directionality_mode(views::Label::AUTO_DETECT_DIRECTIONALITY);
+  int text_start_x = kPadding + size.width() + kIconTextMargin;
+  int min_available = kWindowMinWidth - text_start_x - kPadding;
+  int max_available = kWindowMaxWidth - text_start_x - kPadding;
+  int label_width = label->GetPreferredSize().width();
+  label->SetMultiLine(true);
+  AddChildView(label);
+
+  views::Label* sub_label = NULL;
+  if (!sub_text.empty()) {
+    sub_label = new views::Label(sub_text);
+    sub_label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
+    sub_label->set_directionality_mode(
+        views::Label::AUTO_DETECT_DIRECTIONALITY);
+    label_width = std::max(label_width, sub_label->GetPreferredSize().width());
+    sub_label->SetMultiLine(true);
+    AddChildView(sub_label);
+  }
+
+  if (label_width < min_available)
+    label_width = min_available;
+  else if (label_width > max_available)
+    label_width = max_available;
+  label->SetBounds(text_start_x, kPadding,
+                   label_width, label->GetHeightForWidth(label_width));
+  int content_bottom = kPadding + label->height();
+
+  if (sub_label) {
+    sub_label->SetBounds(text_start_x,
+                         content_bottom + kTextVerticalMargin,
+                         label_width,
+                         sub_label->GetHeightForWidth(label_width));
+    content_bottom += kTextVerticalMargin + sub_label->height();
+  }
+
+  width_ = text_start_x + label_width + kPadding;
+  height_ = content_bottom + kPadding;
+}
+
+ValidationMessageBubbleDelegate::~ValidationMessageBubbleDelegate() {}
+
+void ValidationMessageBubbleDelegate::Hide() {
+  GetWidget()->Hide();
+  observer_ = NULL;
+}
+
+gfx::Size ValidationMessageBubbleDelegate::GetPreferredSize() {
+  return gfx::Size(width_, height_);
+}
+
+void ValidationMessageBubbleDelegate::DeleteDelegate() {
+  delete this;
+}
+
+void ValidationMessageBubbleDelegate::WindowClosing() {
+  if (observer_ != NULL)
+    observer_->WindowClosing();
+}