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/progress_bar_view.h"
6
7#include <algorithm>
8
9#include "ui/base/resource/resource_bundle.h"
10#include "ui/gfx/image/image_skia.h"
11#include "ui/gfx/insets.h"
12#include "ui/resources/grit/ui_resources.h"
13#include "ui/views/painter.h"
14
15namespace app_list {
16
17namespace {
18
19// Image assets for the bar part.
20const int kProgressBarImages[] = {
21  IDR_APP_LIST_ITEM_PROGRESS_LEFT,
22  IDR_APP_LIST_ITEM_PROGRESS_CENTER,
23  IDR_APP_LIST_ITEM_PROGRESS_RIGHT
24};
25
26}  // namespace
27
28ProgressBarView::ProgressBarView()
29    : background_painter_(views::Painter::CreateImagePainter(
30          *ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
31              IDR_APP_LIST_ITEM_PROGRESS_BACKGROUND),
32          gfx::Insets(2, 2, 2, 2))),
33      bar_painter_(new views::HorizontalPainter(kProgressBarImages)) {}
34
35ProgressBarView::~ProgressBarView() {}
36
37gfx::Size ProgressBarView::GetPreferredSize() const {
38  return background_painter_->GetMinimumSize();
39}
40
41void ProgressBarView::OnPaint(gfx::Canvas* canvas) {
42  gfx::Size paint_size = size();
43
44  const gfx::Size min_size(background_painter_->GetMinimumSize());
45  if (paint_size.width() < min_size.width() ||
46      paint_size.height() < min_size.height()) {
47    return;
48  }
49
50  background_painter_->Paint(canvas, paint_size);
51
52  const int kBarEndWidth = 4;
53  const int bar_width = paint_size.width() - kBarEndWidth;
54  DCHECK_GE(bar_width, 0);
55
56  // Map normalized value in [0,1] to the pixel width in
57  // [kBarEndWidth, view_size.width()].
58  paint_size.set_width(kBarEndWidth + bar_width * GetNormalizedValue());
59  bar_painter_->Paint(canvas, paint_size);
60}
61
62}  // namespace app_list
63