// 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. #ifndef COMPONENTS_WEB_MODAL_MODAL_DIALOG_HOST_H_ #define COMPONENTS_WEB_MODAL_MODAL_DIALOG_HOST_H_ #include "components/web_modal/web_modal_export.h" #include "ui/gfx/native_widget_types.h" namespace gfx { class Point; class Size; } // namespace gfx namespace web_modal { // Observer to be implemented to update modal dialogs when the host indicates // their position needs to be changed. class WEB_MODAL_EXPORT ModalDialogHostObserver { public: virtual ~ModalDialogHostObserver(); virtual void OnPositionRequiresUpdate() = 0; // The host must call this method on each observer before destruction. virtual void OnHostDestroying() = 0; }; // Interface for supporting positioning of modal dialogs over a window/widget. class WEB_MODAL_EXPORT ModalDialogHost { public: virtual ~ModalDialogHost(); // Returns the view against which the dialog is positioned and parented. virtual gfx::NativeView GetHostView() const = 0; // Gets the position for the dialog in coordinates relative to the host view. virtual gfx::Point GetDialogPosition(const gfx::Size& size) = 0; // Returns whether a dialog currently about to be shown should be activated. virtual bool ShouldActivateDialog() const; // Add/remove observer. The host must implement these methods, store the // observers in a list, and call OnHostDestroying() on each before host // destruction. See https://crbug.com/1170577 virtual void AddObserver(ModalDialogHostObserver* observer) = 0; virtual void RemoveObserver(ModalDialogHostObserver* observer) = 0; }; } // namespace web_modal #endif // COMPONENTS_WEB_MODAL_MODAL_DIALOG_HOST_H_