ash/system/tray/hover_highlight_view.h

   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 #ifndef ASH_SYSTEM_TRAY_HOVER_HIGHLIGHT_VIEW_H_
   6 #define ASH_SYSTEM_TRAY_HOVER_HIGHLIGHT_VIEW_H_
   7
   8 #include "ash/system/tray/actionable_view.h"
   9 #include "base/basictypes.h"
  10 #include "base/compiler_specific.h"
  11 #include "ui/gfx/font.h"
  12 #include "ui/gfx/text_constants.h"
  13
  14 namespace views {
  15 class Label;
  16 }
  17
  18 namespace ash {
  19 class ViewClickListener;
  20
  21 // A view that changes background color on hover, and triggers a callback in the
  22 // associated ViewClickListener on click. The view can also be forced to
  23 // maintain a fixed height.
  24 class HoverHighlightView : public ActionableView {
  25  public:
  26   explicit HoverHighlightView(ViewClickListener* listener);
  27   ~HoverHighlightView() override;
  28
  29   // Convenience function for adding an icon and a label. This also sets the
  30   // accessible name.
  31   void AddIconAndLabel(const gfx::ImageSkia& image,
  32                        const base::string16& text,
  33                        bool highlight);
  34
  35   // Convenience function for adding a label with padding on the left for a
  36   // blank icon.  This also sets the accessible name. Returns label after
  37   // parenting it.
  38   views::Label* AddLabel(const base::string16& text,
  39                          gfx::HorizontalAlignment alignment,
  40                          bool highlight);
  41
  42   // Convenience function for adding an optional check and a label. In the
  43   // absence of a check, padding is added to align with checked items.
  44   // Returns label after parenting it.
  45   views::Label* AddCheckableLabel(const base::string16& text,
  46                                   bool highlight,
  47                                   bool checked);
  48
  49   // Allows view to expand its height.
  50   // Size of unexapandable view is fixed and equals to kTrayPopupItemHeight.
  51   void SetExpandable(bool expandable);
  52
  53   void set_highlight_color(SkColor color) { highlight_color_ = color; }
  54   void set_default_color(SkColor color) { default_color_ = color; }
  55   void set_text_highlight_color(SkColor c) { text_highlight_color_ = c; }
  56   void set_text_default_color(SkColor color) { text_default_color_ = color; }
  57
  58   views::Label* text_label() { return text_label_; }
  59
  60   bool hover() const { return hover_; }
  61
  62  protected:
  63   // Overridden from views::View.
  64   void GetAccessibleState(ui::AXViewState* state) override;
  65
  66  private:
  67   // Sets the highlighted color on a text label if |hover| is set.
  68   void SetHoverHighlight(bool hover);
  69
  70   // Overridden from ActionableView:
  71   bool PerformAction(const ui::Event& event) override;
  72
  73   // Overridden from views::View.
  74   gfx::Size GetPreferredSize() const override;
  75   int GetHeightForWidth(int width) const override;
  76   void OnMouseEntered(const ui::MouseEvent& event) override;
  77   void OnMouseExited(const ui::MouseEvent& event) override;
  78   void OnGestureEvent(ui::GestureEvent* event) override;
  79   void OnEnabledChanged() override;
  80   void OnPaintBackground(gfx::Canvas* canvas) override;
  81   void OnFocus() override;
  82
  83   ViewClickListener* listener_;
  84   views::Label* text_label_;
  85   SkColor highlight_color_;
  86   SkColor default_color_;
  87   SkColor text_highlight_color_;
  88   SkColor text_default_color_;
  89   bool hover_;
  90   bool expandable_;
  91   bool checkable_;
  92   bool checked_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(HoverHighlightView);
  95 };
  96
  97 }  // namespace ash
  98
  99 #endif  // ASH_SYSTEM_TRAY_HOVER_HIGHLIGHT_VIEW_H_