Upstream version 7.36.149.0
[platform/framework/web/crosswalk.git] / src / ui / app_list / views / cached_label.cc
1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "ui/app_list/views/cached_label.h"
6
7 #include "base/strings/utf_string_conversions.h"
8 #include "ui/base/resource/resource_bundle.h"
9 #include "ui/gfx/canvas.h"
10
11 namespace app_list {
12
13 CachedLabel::CachedLabel()
14     : needs_repaint_(true) {
15 }
16
17 void CachedLabel::PaintToBackingImage() {
18   if (image_.size() == size() && !needs_repaint_)
19     return;
20
21   bool is_opaque = SkColorGetA(background_color()) == 0xFF;
22   gfx::Canvas canvas(size(), 1.0f, is_opaque);
23   // If a background is provided, it will initialize the canvas in
24   // View::OnPaintBackground(). Otherwise, the background must be set here.
25   if (!background()) {
26     canvas.FillRect(
27         GetLocalBounds(), background_color(), SkXfermode::kSrc_Mode);
28   }
29   Label::OnPaint(&canvas);
30   image_ = gfx::ImageSkia(canvas.ExtractImageRep());
31   needs_repaint_ = false;
32 }
33
34 #if defined(OS_WIN)
35 void CachedLabel::OnPaint(gfx::Canvas* canvas) {
36   PaintToBackingImage();
37   canvas->DrawImageInt(image_, 0, 0);
38 }
39 #endif
40
41 }  // namespace app_list