ui/views/controls/progress_bar.h

   1 // Copyright (c) 2011 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_CONTROLS_PROGRESS_BAR_H_
   6 #define UI_VIEWS_CONTROLS_PROGRESS_BAR_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "ui/views/view.h"
  11
  12 namespace views {
  13
  14 // Progress bar is a control that indicates progress visually.
  15 class VIEWS_EXPORT ProgressBar : public View {
  16  public:
  17   // The value range defaults to [0.0, 1.0].
  18   ProgressBar();
  19   ~ProgressBar() override;
  20
  21   double current_value() const { return current_value_; }
  22
  23   // Gets a normalized current value in [0.0, 1.0] range based on current value
  24   // range and the min/max display value range.
  25   double GetNormalizedValue() const;
  26
  27   // Sets the inclusive range of values to be displayed.  Values outside of the
  28   // range will be capped when displayed.
  29   void SetDisplayRange(double min_display_value, double max_display_value);
  30
  31   // Sets the current value.  Values outside of the range [min_display_value_,
  32   // max_display_value_] will be stored unmodified and capped for display.
  33   void SetValue(double value);
  34
  35   // Sets the tooltip text.  Default behavior for a progress bar is to show no
  36   // tooltip on mouse hover. Calling this lets you set a custom tooltip.  To
  37   // revert to default behavior, call this with an empty string.
  38   void SetTooltipText(const base::string16& tooltip_text);
  39
  40   // Overridden from View:
  41   bool GetTooltipText(const gfx::Point& p,
  42                       base::string16* tooltip) const override;
  43   void GetAccessibleState(ui::AXViewState* state) override;
  44
  45  private:
  46   static const char kViewClassName[];
  47
  48   // Overridden from View:
  49   gfx::Size GetPreferredSize() const override;
  50   const char* GetClassName() const override;
  51   void OnPaint(gfx::Canvas* canvas) override;
  52
  53   // Inclusive range used when displaying values.
  54   double min_display_value_;
  55   double max_display_value_;
  56
  57   // Current value.  May be outside of [min_display_value_, max_display_value_].
  58   double current_value_;
  59
  60   // Tooltip text.
  61   base::string16 tooltip_text_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(ProgressBar);
  64 };
  65
  66 }  // namespace views
  67
  68 #endif  // UI_VIEWS_CONTROLS_PROGRESS_BAR_H_