components/web_modal/modal_dialog_host.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_WEB_MODAL_MODAL_DIALOG_HOST_H_
   6 #define COMPONENTS_WEB_MODAL_MODAL_DIALOG_HOST_H_
   7
   8 #include "ui/gfx/native_widget_types.h"
   9
  10 namespace gfx {
  11 class Point;
  12 class Size;
  13 }  // namespace gfx
  14
  15 namespace web_modal {
  16
  17 // Observer to be implemented to update modal dialogs when the host indicates
  18 // their position needs to be changed.
  19 class ModalDialogHostObserver {
  20  public:
  21   virtual ~ModalDialogHostObserver();
  22
  23   virtual void OnPositionRequiresUpdate() = 0;
  24   virtual void OnHostDestroying() = 0;
  25 };
  26
  27 // Interface for supporting positioning of modal dialogs over a window/widget.
  28 class ModalDialogHost {
  29  public:
  30   virtual ~ModalDialogHost();
  31
  32   // Returns the view against which the dialog is positioned and parented.
  33   virtual gfx::NativeView GetHostView() const = 0;
  34   // Gets the position for the dialog in coordinates relative to the host view.
  35   virtual gfx::Point GetDialogPosition(const gfx::Size& size) = 0;
  36
  37   // Add/remove observer.
  38   virtual void AddObserver(ModalDialogHostObserver* observer) = 0;
  39   virtual void RemoveObserver(ModalDialogHostObserver* observer) = 0;
  40 };
  41
  42 }  // namespace web_modal
  43
  44 #endif  // COMPONENTS_WEB_MODAL_MODAL_DIALOG_HOST_H_