blob: a7a734d1404842974ca7664aada412b6536c25b1 (
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
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
// 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.
#include "ui/app_list/views/cached_label.h"
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#include "ui/base/layout.h"
#include "ui/gfx/canvas.h"
#include "ui/views/widget/widget.h"
namespace app_list {
CachedLabel::CachedLabel()
: needs_repaint_(true) {
}
void CachedLabel::PaintToBackingImage() {
if (image_.size() == size() && !needs_repaint_)
return;
bool is_opaque = SkColorGetA(background_color()) == 0xFF;
float scale_factor =
ui::GetScaleFactorForNativeView(GetWidget()->GetNativeView());
gfx::Canvas canvas(size(), scale_factor, is_opaque);
// If a background is provided, it will initialize the canvas in
// View::OnPaintBackground(). Otherwise, the background must be set here.
if (!background()) {
canvas.FillRect(
GetLocalBounds(), background_color(), SkXfermode::kSrc_Mode);
}
Label::OnPaint(&canvas);
image_ = gfx::ImageSkia(canvas.ExtractImageRep());
needs_repaint_ = false;
}
#if defined(OS_WIN)
void CachedLabel::OnPaint(gfx::Canvas* canvas) {
PaintToBackingImage();
canvas->DrawImageInt(image_, 0, 0);
}
#endif
void CachedLabel::OnDeviceScaleFactorChanged(
float device_scale_factor) {
Invalidate();
Label::OnDeviceScaleFactorChanged(device_scale_factor);
}
} // namespace app_list
|
