athena/home/minimized_home.cc

   1 // Copyright 2014 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 "athena/home/minimized_home.h"
   6
   7 #include "ui/compositor/layer.h"
   8 #include "ui/compositor/layer_owner.h"
   9 #include "ui/gfx/canvas.h"
  10
  11 namespace {
  12
  13 const int kDragHandleWidth = 112;
  14 const int kDragHandleHeight = 2;
  15 const char kMinimizedHomeLayerName[] = "MinimizedHome";
  16
  17 class MinimizedHomePainter : public ui::LayerDelegate,
  18                              public ui::LayerOwner {
  19  public:
  20   explicit MinimizedHomePainter(ui::Layer* layer) {
  21     layer->set_name(kMinimizedHomeLayerName);
  22     layer->set_delegate(this);
  23     SetLayer(layer);
  24   }
  25   virtual ~MinimizedHomePainter() {}
  26
  27  private:
  28   // ui::LayerDelegate:
  29   virtual void OnPaintLayer(gfx::Canvas* canvas) OVERRIDE {
  30     gfx::Rect bounds(layer()->GetTargetBounds().size());
  31     canvas->FillRect(bounds, SK_ColorBLACK);
  32     canvas->FillRect(gfx::Rect((bounds.width() - kDragHandleWidth) / 2,
  33                                bounds.bottom() - kDragHandleHeight,
  34                                kDragHandleWidth,
  35                                kDragHandleHeight),
  36                      SK_ColorWHITE);
  37   }
  38
  39   virtual void OnDelegatedFrameDamage(
  40       const gfx::Rect& damage_rect_in_dip) OVERRIDE {
  41   }
  42
  43   virtual void OnDeviceScaleFactorChanged(float device_scale_factor) OVERRIDE {
  44   }
  45
  46   virtual base::Closure PrepareForLayerBoundsChange() OVERRIDE {
  47     return base::Closure();
  48   }
  49
  50   DISALLOW_COPY_AND_ASSIGN(MinimizedHomePainter);
  51 };
  52
  53 }  // namespace
  54
  55 namespace athena {
  56
  57 scoped_ptr<ui::LayerOwner> CreateMinimizedHome() {
  58   return scoped_ptr<ui::LayerOwner>(
  59       new MinimizedHomePainter(new ui::Layer(ui::LAYER_TEXTURED)));
  60 }
  61
  62 }  // namespace athena