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// Copyright (c) 2011 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_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
#define UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
#include "ui/gfx/native_widget_types.h"
#include "ui/views/views_export.h"
namespace views {
class NativeViewHost;
// An interface that implemented by an object that wraps a gfx::NativeView on
// a specific platform, used to perform platform specific operations on that
// native view when attached, detached, moved and sized.
class VIEWS_EXPORT NativeViewHostWrapper {
public:
virtual ~NativeViewHostWrapper() {}
// Called at the end of NativeViewHost::Attach, allowing the wrapper to
// perform platform-specific operations that need to occur to complete
// attaching the gfx::NativeView.
virtual void AttachNativeView() = 0;
// Called before the attached gfx::NativeView is detached from the
// NativeViewHost, allowing the wrapper to perform platform-specific
// cleanup. |destroyed| is true if the native view is detached
// because it's being destroyed, or false otherwise.
virtual void NativeViewDetaching(bool destroyed) = 0;
// Called when our associated NativeViewHost is added to a View hierarchy
// rooted at a valid Widget.
virtual void AddedToWidget() = 0;
// Called when our associated NativeViewHost is removed from a View hierarchy
// rooted at a valid Widget.
virtual void RemovedFromWidget() = 0;
// Installs a clip on the gfx::NativeView. These values are in the coordinate
// space of the Widget, so if this method is called from ShowWidget
// then the values need to be translated.
virtual void InstallClip(int x, int y, int w, int h) = 0;
// Whether or not a clip has been installed on the wrapped gfx::NativeView.
virtual bool HasInstalledClip() = 0;
// Removes the clip installed on the gfx::NativeView by way of InstallClip. A
// following call to ShowWidget should occur after calling this method to
// position the gfx::NativeView correctly, since the clipping process may have
// adjusted its position.
virtual void UninstallClip() = 0;
// Shows the gfx::NativeView at the specified position (relative to the parent
// native view).
virtual void ShowWidget(int x, int y, int w, int h) = 0;
// Hides the gfx::NativeView. NOTE: this may be invoked when the native view
// is already hidden.
virtual void HideWidget() = 0;
// Sets focus to the gfx::NativeView.
virtual void SetFocus() = 0;
// Return the native view accessible corresponding to the wrapped native
// view.
virtual gfx::NativeViewAccessible GetNativeViewAccessible() = 0;
// Returns the native cursor corresponding to the point (x, y)
// in the native view.
virtual gfx::NativeCursor GetCursor(int x, int y) = 0;
// Creates a platform-specific instance of an object implementing this
// interface.
static NativeViewHostWrapper* CreateWrapper(NativeViewHost* host);
};
} // namespace views
#endif // UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_WRAPPER_H_
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