views: add Harmony dialog width support

ui/views/window/dialog_delegate.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_WINDOW_DIALOG_DELEGATE_H_
 #define UI_VIEWS_WINDOW_DIALOG_DELEGATE_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/strings/string16.h"
@@ skipping 14 matching lines @@
 //
 //  DialogDelegate is an interface implemented by objects that wish to show a
 //  dialog box Window. The window that is displayed uses this interface to
 //  determine how it should be displayed and notify the delegate object of
 //  certain events.
 //
 ///////////////////////////////////////////////////////////////////////////////
 class VIEWS_EXPORT DialogDelegate : public ui::DialogModel,
                                     public WidgetDelegate {
  public:
+  enum DialogWidth {
+    DIALOG_WIDTH_DEFAULT,
+    DIALOG_WIDTH_SMALL,
+    DIALOG_WIDTH_MEDIUM,
+    DIALOG_WIDTH_LARGE,
+  };
+
   DialogDelegate();
   ~DialogDelegate() override;
 
   // Creates a widget at a default location.
   static Widget* CreateDialogWidget(WidgetDelegate* delegate,
                                     gfx::NativeWindow context,
                                     gfx::NativeView parent);
 
   // Returns the dialog widget InitParams for a given |context| or |parent|.
   // If |bounds| is not empty, used to initially place the dialog, otherwise
@@ skipping 35 matching lines @@
   // gesture. By default, this calls Accept() if the only button in the dialog
   // is Accept, Cancel() otherwise. This function should return true if the
   // window can be closed after it returns, or false if it must remain open.
   virtual bool Close();
 
   // Updates the properties and appearance of |button| which has been created
   // for type |type|. Override to do special initialization above and beyond
   // the typical.
   virtual void UpdateButton(LabelButton* button, ui::DialogButton type);
 
+  // Returns the dialog width this dialog should use, or DIALOG_WIDTH_DEFAULT
+  // for the default width. This value is only honored when MD secondary UI is
+  // enabled.
+  virtual DialogWidth GetDefaultDialogWidth() const;

[Evan Stade, 2016/09/28 16:14:37]

nit: I don't think you need "Default" in this fn name.

[Elly Fong-Jones, 2016/09/28 18:44:09]

Done.

+
   // Overridden from ui::DialogModel:
   int GetDialogButtons() const override;
   int GetDefaultDialogButton() const override;
   bool ShouldDefaultButtonBeBlue() const override;
   base::string16 GetDialogButtonLabel(ui::DialogButton button) const override;
   bool IsDialogButtonEnabled(ui::DialogButton button) const override;
 
   // Overridden from WidgetDelegate:
   View* GetInitiallyFocusedView() override;
   DialogDelegate* AsDialogDelegate() override;
@@ skipping 36 matching lines @@
   // Overridden from DialogDelegate:
   void DeleteDelegate() override;
   Widget* GetWidget() override;
   const Widget* GetWidget() const override;
   View* GetContentsView() override;
 
   // Overridden from View:
   void GetAccessibleState(ui::AXViewState* state) override;
   void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) override;
+  gfx::Size GetPreferredSize() const override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DialogDelegateView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_WINDOW_DIALOG_DELEGATE_H_