Allow dialogs to use a custom View as their title.

ui/views/bubble/bubble_frame_view.h

 // 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.
 
 #ifndef UI_VIEWS_BUBBLE_BUBBLE_FRAME_VIEW_H_
 #define UI_VIEWS_BUBBLE_BUBBLE_FRAME_VIEW_H_
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
+#include "ui/gfx/font_list.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/views/controls/button/button.h"
+#include "ui/views/controls/label.h"
 #include "ui/views/window/non_client_view.h"
 
-namespace gfx {
-class FontList;
-}
-
 namespace views {
 
-class Label;
 class BubbleBorder;
 class ImageView;
 
 // The non-client frame view of bubble-styled widgets.
 class VIEWS_EXPORT BubbleFrameView : public NonClientFrameView,
                                      public ButtonListener {
  public:
   // Internal class name.
   static const char kViewClassName[];
 
   BubbleFrameView(const gfx::Insets& title_margins,
                   const gfx::Insets& content_margins);
   ~BubbleFrameView() override;
 
+  static std::unique_ptr<Label> CreateDefaultTitleLabel(
+      const base::string16& title_text);
+
   // Creates a close button used in the corner of the dialog.
   static Button* CreateCloseButton(ButtonListener* listener);
 
   // NonClientFrameView:
   gfx::Rect GetBoundsForClientView() const override;
   gfx::Rect GetWindowBoundsForClientBounds(
       const gfx::Rect& client_bounds) const override;
   bool GetClientMask(const gfx::Size& size, gfx::Path* path) const override;
   int NonClientHitTest(const gfx::Point& point) override;
   void GetWindowMask(const gfx::Size& size, gfx::Path* window_mask) override;
   void ResetWindowControls() override;
   void UpdateWindowIcon() override;
   void UpdateWindowTitle() override;
   void SizeConstraintsChanged() override;
 
-  // Set the FontList to be used for the title of the bubble.
-  // Caller must arrange to update the layout to have the call take effect.
-  void SetTitleFontList(const gfx::FontList& font_list);
+  // Sets a custom view to be the dialog title instead of the |default_title_|
+  // label. If there is an existing title view it will be deleted.
+  void SetTitleView(std::unique_ptr<View> title_view);
 
   // View:
   const char* GetClassName() const override;
   gfx::Insets GetInsets() const override;
   gfx::Size CalculatePreferredSize() const override;
   gfx::Size GetMinimumSize() const override;
   gfx::Size GetMaximumSize() const override;
   void Layout() override;
   void OnPaint(gfx::Canvas* canvas) override;
   void PaintChildren(const ui::PaintContext& context) override;
   void OnThemeChanged() override;
   void OnNativeThemeChanged(const ui::NativeTheme* theme) override;
   void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) override;
 
   // ButtonListener:
   void ButtonPressed(Button* sender, const ui::Event& event) override;
 
   // Use bubble_border() and SetBubbleBorder(), not border() and SetBorder().
   BubbleBorder* bubble_border() const { return bubble_border_; }
   void SetBubbleBorder(std::unique_ptr<BubbleBorder> border);
 
+  const View* title() const {
+    return custom_title_ ? custom_title_ : default_title_;
+  }
+  View* title() {
+    return const_cast<View*>(
+        static_cast<const BubbleFrameView*>(this)->title());

[Peter Kasting, 2017/06/27 01:13:18]

Nit: I kinda wonder whether just duplicating the const version might be better
since it's shorter and more readable.  I mean, I know it's duplicated, but...

[Bret, 2017/06/27 23:21:42]

I would if it were a totally trivial getter, but I think this is okay.

+  }
+
   gfx::Insets content_margins() const { return content_margins_; }
 
   void SetFootnoteView(View* view);
 
   // Given the size of the contents and the rect to point at, returns the bounds
   // of the bubble window. The bubble's arrow location may change if the bubble
   // does not fit on the monitor and |adjust_if_offscreen| is true.
   gfx::Rect GetUpdatedWindowBounds(const gfx::Rect& anchor_rect,
                                    const gfx::Size& client_size,
                                    bool adjust_if_offscreen);
@@ skipping 31 matching lines @@
 
   // The bubble border.
   BubbleBorder* bubble_border_;
 
   // Margins around the title label.
   gfx::Insets title_margins_;
 
   // Margins between the content and the inside of the border, in pixels.
   gfx::Insets content_margins_;
 
-  // The optional title icon, title, and (x) close button.
+  // The optional title icon.
   views::ImageView* title_icon_;
-  Label* title_;
+
+  // One of these fields is used as the dialog title. If SetTitleView is called
+  // the custom title view is stored in |custom_title_| and this class assumes
+  // ownership. Otherwise |default_title_| is used.
+  Label* default_title_;
+  View* custom_title_;
+
+  // The optional close button (the X).
   Button* close_;
 
   // A view to contain the footnote view, if it exists.
   View* footnote_container_;
 
   // Whether the close button was clicked.
   bool close_button_clicked_;
 
   DISALLOW_COPY_AND_ASSIGN(BubbleFrameView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_BUBBLE_BUBBLE_FRAME_VIEW_H_