ui/message_center/views/proportional_image_view.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/message_center/views/proportional_image_view.h"
   6
   7 #include "ui/gfx/canvas.h"
   8 #include "ui/message_center/message_center_style.h"
   9
  10 namespace message_center {
  11
  12 ProportionalImageView::ProportionalImageView(const gfx::ImageSkia& image,
  13                                              const gfx::Size& max_size)
  14     : image_(image), max_size_(max_size) {}
  15
  16 ProportionalImageView::~ProportionalImageView() {}
  17
  18 gfx::Size ProportionalImageView::GetPreferredSize() const { return max_size_; }
  19
  20 int ProportionalImageView::GetHeightForWidth(int width) const {
  21   return max_size_.height();
  22 }
  23
  24 void ProportionalImageView::OnPaint(gfx::Canvas* canvas) {
  25   views::View::OnPaint(canvas);
  26
  27   gfx::Size draw_size = GetImageDrawingSize();
  28
  29   if (draw_size.IsEmpty())
  30     return;
  31
  32   gfx::Rect draw_bounds = GetContentsBounds();
  33   draw_bounds.ClampToCenteredSize(draw_size);
  34
  35   gfx::Size image_size(image_.size());
  36
  37   if (image_size == draw_size) {
  38     canvas->DrawImageInt(image_, draw_bounds.x(), draw_bounds.y());
  39   } else {
  40     SkPaint paint;
  41     paint.setFilterQuality(kLow_SkFilterQuality);
  42
  43     // This call resizes the image while drawing into the canvas.
  44     canvas->DrawImageInt(
  45         image_,
  46         0, 0, image_size.width(), image_size.height(),
  47         draw_bounds.x(), draw_bounds.y(), draw_size.width(), draw_size.height(),
  48         true,
  49         paint);
  50   }
  51 }
  52
  53 gfx::Size ProportionalImageView::GetImageDrawingSize() {
  54   if (!visible())
  55     return gfx::Size();
  56   return message_center::GetImageSizeForContainerSize(
  57       GetContentsBounds().size(), image_.size());
  58 }
  59
  60 }  // namespace message_center