ui/views/corewm/tooltip_aura.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 UI_VIEWS_COREWM_TOOLTIP_AURA_H_
   6 #define UI_VIEWS_COREWM_TOOLTIP_AURA_H_
   7
   8 #include "ui/gfx/screen_type_delegate.h"
   9 #include "ui/views/controls/label.h"
  10 #include "ui/views/corewm/tooltip.h"
  11 #include "ui/views/widget/widget_observer.h"
  12
  13 namespace gfx {
  14 class FontList;
  15 }  // namespace gfx
  16
  17 namespace views {
  18
  19 class Widget;
  20
  21 namespace corewm {
  22
  23 // Implementation of Tooltip that shows the tooltip using a Widget and Label.
  24 class VIEWS_EXPORT TooltipAura : public Tooltip, public WidgetObserver {
  25  public:
  26   explicit TooltipAura(gfx::ScreenType screen_type);
  27   ~TooltipAura() override;
  28
  29   // Trims the tooltip to fit in the width |max_width|, setting |text| to the
  30   // clipped result, |width| to the width (in pixels) of the clipped text
  31   // and |line_count| to the number of lines of text in the tooltip. |font_list|
  32   // is used to layout |text|. |max_width| comes from GetMaxWidth().
  33   static void TrimTooltipToFit(const gfx::FontList& font_list,
  34                                int max_width,
  35                                base::string16* text,
  36                                int* width,
  37                                int* line_count);
  38
  39  private:
  40   // Returns the max width of the tooltip when shown at the specified location.
  41   int GetMaxWidth(const gfx::Point& location) const;
  42
  43   // Adjusts the bounds given by the arguments to fit inside the desktop
  44   // and applies the adjusted bounds to the label_.
  45   void SetTooltipBounds(const gfx::Point& mouse_pos,
  46                         const gfx::Size& tooltip_size);
  47
  48   // Destroys |widget_|.
  49   void DestroyWidget();
  50
  51   // Tooltip:
  52   void SetText(aura::Window* window,
  53                const base::string16& tooltip_text,
  54                const gfx::Point& location) override;
  55   void Show() override;
  56   void Hide() override;
  57   bool IsVisible() override;
  58
  59   // WidgetObserver:
  60   void OnWidgetDestroying(Widget* widget) override;
  61
  62   const gfx::ScreenType screen_type_;
  63
  64   // The label showing the tooltip.
  65   Label label_;
  66
  67   // The widget containing the tooltip. May be NULL.
  68   Widget* widget_;
  69
  70   // The window we're showing the tooltip for. Never NULL and valid while
  71   // showing.
  72   aura::Window* tooltip_window_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(TooltipAura);
  75 };
  76
  77 }  // namespace corewm
  78 }  // namespace views
  79
  80 #endif  // UI_VIEWS_COREWM_TOOLTIP_AURA_H_