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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 VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_
#define VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_
#pragma once
#include "views/views_export.h"
#include "ui/base/events.h"
namespace gfx {
class Canvas;
class Point;
class Size;
}
namespace views {
class InputMethod;
class KeyEvent;
class MouseEvent;
class TouchEvent;
namespace internal {
////////////////////////////////////////////////////////////////////////////////
// NativeWidgetDelegate
//
// An interface implemented by the object that handles events sent by a
// NativeWidget implementation.
//
class VIEWS_EXPORT NativeWidgetDelegate {
public:
virtual ~NativeWidgetDelegate() {}
// Returns true if the window is modal.
virtual bool IsModal() const = 0;
// Returns true if the window is a dialog box.
virtual bool IsDialogBox() const = 0;
// Returns true if the window can be activated.
virtual bool CanActivate() const = 0;
virtual bool IsInactiveRenderingDisabled() const = 0;
virtual void EnableInactiveRendering() = 0;
// Called when the activation state of a window has changed.
virtual void OnNativeWidgetActivationChanged(bool active) = 0;
// Called when native focus moves from one native view to another.
virtual void OnNativeFocus(gfx::NativeView focused_view) = 0;
virtual void OnNativeBlur(gfx::NativeView focused_view) = 0;
// Called when the window is shown/hidden.
virtual void OnNativeWidgetVisibilityChanged(bool visible) = 0;
// Called when the native widget is created.
virtual void OnNativeWidgetCreated() = 0;
// Called just before the native widget is destroyed. This is the delegate's
// last chance to do anything with the native widget handle.
virtual void OnNativeWidgetDestroying() = 0;
// Called just after the native widget is destroyed.
virtual void OnNativeWidgetDestroyed() = 0;
// Returns the smallest size the window can be resized to by the user.
virtual gfx::Size GetMinimumSize() = 0;
// Called when the NativeWidget changed size to |new_size|.
virtual void OnNativeWidgetSizeChanged(const gfx::Size& new_size) = 0;
// Called when the user begins/ends to change the bounds of the window.
virtual void OnNativeWidgetBeginUserBoundsChange() = 0;
virtual void OnNativeWidgetEndUserBoundsChange() = 0;
// Returns true if the delegate has a FocusManager.
virtual bool HasFocusManager() const = 0;
// Paints the widget using acceleration. If the widget is not using
// accelerated painting this returns false and does nothing.
virtual bool OnNativeWidgetPaintAccelerated(
const gfx::Rect& dirty_region) = 0;
// Paints the rootview in the canvas. This will also refresh the compositor
// tree if necessary when accelerated painting is enabled.
virtual void OnNativeWidgetPaint(gfx::Canvas* canvas) = 0;
// Returns the non-client component (see ui/base/hit_test.h) containing
// |point|, in client coordinates.
virtual int GetNonClientComponent(const gfx::Point& point) = 0;
// Mouse and key event handlers.
virtual bool OnKeyEvent(const KeyEvent& event) = 0;
virtual bool OnMouseEvent(const MouseEvent& event) = 0;
virtual void OnMouseCaptureLost() = 0;
virtual ui::TouchStatus OnTouchEvent(const TouchEvent& event) = 0;
// Runs the specified native command. Returns true if the command is handled.
virtual bool ExecuteCommand(int command_id) = 0;
// Returns the input method of the widget this delegate is associated with.
// Note that this does not use the top level widget, so may return NULL
// if the widget doesn't have input method.
virtual InputMethod* GetInputMethodDirect() = 0;
//
virtual Widget* AsWidget() = 0;
virtual const Widget* AsWidget() const = 0;
};
} // namespace internal
} // namespace views
#endif // VIEWS_WIDGET_NATIVE_WIDGET_DELEGATE_H_
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