ash/frame/default_header_painter.h

   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 #ifndef ASH_FRAME_DEFAULT_HEADER_PAINTER_H_
   6 #define ASH_FRAME_DEFAULT_HEADER_PAINTER_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/frame/header_painter.h"
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"  // override
  12 #include "base/gtest_prod_util.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "third_party/skia/include/core/SkColor.h"
  15 #include "ui/gfx/animation/animation_delegate.h"
  16
  17 namespace gfx {
  18 class ImageSkia;
  19 class Rect;
  20 class SlideAnimation;
  21 }
  22 namespace views {
  23 class View;
  24 class Widget;
  25 }
  26
  27 namespace ash {
  28 class FrameCaptionButtonContainerView;
  29
  30 // Helper class for painting the default window header.
  31 class ASH_EXPORT DefaultHeaderPainter : public HeaderPainter,
  32                                         public gfx::AnimationDelegate {
  33  public:
  34   DefaultHeaderPainter();
  35   ~DefaultHeaderPainter() override;
  36
  37   // DefaultHeaderPainter does not take ownership of any of the parameters.
  38   void Init(views::Widget* frame,
  39             views::View* header_view,
  40             FrameCaptionButtonContainerView* caption_button_container);
  41
  42   // HeaderPainter overrides:
  43   int GetMinimumHeaderWidth() const override;
  44   void PaintHeader(gfx::Canvas* canvas, Mode mode) override;
  45   void LayoutHeader() override;
  46   int GetHeaderHeight() const override;
  47   int GetHeaderHeightForPainting() const override;
  48   void SetHeaderHeightForPainting(int height) override;
  49   void SchedulePaintForTitle() override;
  50   void UpdateLeftViewXInset(int left_view_x_inset) override;
  51
  52   // Sets the left header view for the header. Passing NULL removes the view.
  53   void UpdateLeftHeaderView(views::View* left_header_view);
  54
  55   // Sets the active and inactive frame colors. Note the inactive frame color
  56   // will have some transparency added when the frame is drawn.
  57   void SetFrameColors(SkColor active_frame_color, SkColor inactive_frame_color);
  58
  59  private:
  60   FRIEND_TEST_ALL_PREFIXES(DefaultHeaderPainterTest, TitleIconAlignment);
  61   FRIEND_TEST_ALL_PREFIXES(DefaultHeaderPainterTest, LightIcons);
  62
  63   // gfx::AnimationDelegate override:
  64   void AnimationProgressed(const gfx::Animation* animation) override;
  65
  66   // Paints highlight around the edge of the header for inactive restored
  67   // windows.
  68   void PaintHighlightForInactiveRestoredWindow(gfx::Canvas* canvas);
  69
  70   // Paints the title bar, primarily the title string.
  71   void PaintTitleBar(gfx::Canvas* canvas);
  72
  73   // Paints the header/content separator.
  74   void PaintHeaderContentSeparator(gfx::Canvas* canvas);
  75
  76   // Layout the left header view.
  77   void LayoutLeftHeaderView();
  78
  79   // Whether light caption images should be used. This is the case when the
  80   // background of the frame is dark.
  81   bool ShouldUseLightImages();
  82
  83   // Update all the images in the caption buttons.
  84   void UpdateAllButtonImages();
  85
  86   // Updates the size button's images.
  87   void UpdateSizeButtonImages(bool use_light_images);
  88
  89   // Returns the header bounds in the coordinates of |view_|. The header is
  90   // assumed to be positioned at the top left corner of |view_| and to have the
  91   // same width as |view_|.
  92   gfx::Rect GetLocalBounds() const;
  93
  94   // Returns the bounds for the title.
  95   gfx::Rect GetTitleBounds() const;
  96
  97   // Returns whether the frame uses custom frame coloring.
  98   bool UsesCustomFrameColors() const;
  99
 100   views::Widget* frame_;
 101   views::View* view_;
 102   views::View* left_header_view_;  // May be NULL.
 103   int left_view_x_inset_;
 104   SkColor active_frame_color_;
 105   SkColor inactive_frame_color_;
 106   FrameCaptionButtonContainerView* caption_button_container_;
 107
 108   // The height of the header to paint.
 109   int painted_height_;
 110
 111   // Whether the header should be painted as active.
 112   Mode mode_;
 113
 114   // Whether the header is painted for the first time.
 115   bool initial_paint_;
 116
 117   scoped_ptr<gfx::SlideAnimation> activation_animation_;
 118
 119   DISALLOW_COPY_AND_ASSIGN(DefaultHeaderPainter);
 120 };
 121
 122 }  // namespace ash
 123
 124 #endif  // ASH_FRAME_DEFAULT_HEADER_PAINTER_H_