blob: 12b137f0cf2a16ebba5b3962ceee478e9c827b7f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
// Copyright (c) 2012 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_COMPOSITOR_LAYER_DELEGATE_H_
#define UI_COMPOSITOR_LAYER_DELEGATE_H_
#include "base/callback_forward.h"
#include "ui/compositor/compositor_export.h"
namespace gfx {
class Canvas;
}
namespace ui {
// A delegate interface implemented by an object that renders to a Layer.
class COMPOSITOR_EXPORT LayerDelegate {
public:
// Paint content for the layer to the specified canvas. It has already been
// clipped to the Layer's invalid rect.
virtual void OnPaintLayer(gfx::Canvas* canvas) = 0;
// Called when the layer's device scale factor has changed.
virtual void OnDeviceScaleFactorChanged(float device_scale_factor) = 0;
// Invoked prior to the bounds changing. The returned closured is run after
// the bounds change.
virtual base::Closure PrepareForLayerBoundsChange() = 0;
protected:
virtual ~LayerDelegate() {}
};
} // namespace ui
#endif // UI_COMPOSITOR_LAYER_DELEGATE_H_
|
