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 GetHeaderHeightForPainting() const override;
  47   void SetHeaderHeightForPainting(int height) override;
  48   void SchedulePaintForTitle() override;
  49   void UpdateLeftViewXInset(int left_view_x_inset) override;
  50
  51   // Sets the left header view for the header. Passing NULL removes the view.
  52   void UpdateLeftHeaderView(views::View* left_header_view);
  53
  54   // Sets the active and inactive frame colors. Note the inactive frame color
  55   // will have some transparency added when the frame is drawn.
  56   void SetFrameColors(SkColor active_frame_color, SkColor inactive_frame_color);
  57
  58  private:
  59   FRIEND_TEST_ALL_PREFIXES(DefaultHeaderPainterTest, TitleIconAlignment);
  60   FRIEND_TEST_ALL_PREFIXES(DefaultHeaderPainterTest, LightIcons);
  61
  62   // gfx::AnimationDelegate override:
  63   void AnimationProgressed(const gfx::Animation* animation) override;
  64
  65   // Paints highlight around the edge of the header for inactive restored
  66   // windows.
  67   void PaintHighlightForInactiveRestoredWindow(gfx::Canvas* canvas);
  68
  69   // Paints the title bar, primarily the title string.
  70   void PaintTitleBar(gfx::Canvas* canvas);
  71
  72   // Paints the header/content separator.
  73   void PaintHeaderContentSeparator(gfx::Canvas* canvas);
  74
  75   // Layout the left header view.
  76   void LayoutLeftHeaderView();
  77
  78   // Whether light caption images should be used. This is the case when the
  79   // background of the frame is dark.
  80   bool ShouldUseLightImages();
  81
  82   // Update all the images in the caption buttons.
  83   void UpdateAllButtonImages();
  84
  85   // Updates the size button's images.
  86   void UpdateSizeButtonImages(bool use_light_images);
  87
  88   // Returns the header bounds in the coordinates of |view_|. The header is
  89   // assumed to be positioned at the top left corner of |view_| and to have the
  90   // same width as |view_|.
  91   gfx::Rect GetLocalBounds() const;
  92
  93   // Returns the bounds for the title.
  94   gfx::Rect GetTitleBounds() const;
  95
  96   // Returns whether the frame uses custom frame coloring.
  97   bool UsesCustomFrameColors() const;
  98
  99   views::Widget* frame_;
 100   views::View* view_;
 101   views::View* left_header_view_;  // May be NULL.
 102   int left_view_x_inset_;
 103   SkColor active_frame_color_;
 104   SkColor inactive_frame_color_;
 105   FrameCaptionButtonContainerView* caption_button_container_;
 106
 107   // The height of the header including the header/content separator.
 108   int height_;
 109
 110   // Whether the header should be painted as active.
 111   Mode mode_;
 112
 113   // Whether the header is painted for the first time.
 114   bool initial_paint_;
 115
 116   scoped_ptr<gfx::SlideAnimation> activation_animation_;
 117
 118   DISALLOW_COPY_AND_ASSIGN(DefaultHeaderPainter);
 119 };
 120
 121 }  // namespace ash
 122
 123 #endif  // ASH_FRAME_DEFAULT_HEADER_PAINTER_H_