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// Copyright 2013 The Chromium Authors
// 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_
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