ui/message_center/views/bounded_label.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_MESSAGE_CENTER_BOUNDED_LABEL_H_
   6 #define UI_MESSAGE_CENTER_BOUNDED_LABEL_H_
   7
   8 #include <list>
   9 #include <map>
  10
  11 #include "base/memory/scoped_ptr.h"
  12 #include "third_party/skia/include/core/SkColor.h"
  13 #include "ui/message_center/message_center_export.h"
  14 #include "ui/views/view.h"
  15
  16 namespace gfx {
  17
  18 class Font;
  19
  20 }  // namespace gfx
  21
  22 namespace message_center {
  23
  24 class InnerBoundedLabel;
  25
  26 // BoundedLabels display left aligned text up to a maximum number of lines, with
  27 // ellipsis at the end of the last line for any omitted text. BoundedLabel is a
  28 // direct subclass of views::Views rather than a subclass of views::Label
  29 // because of limitations in views::Label's implementation. See the description
  30 // of InnerBoundedLabel in the .cc file for details.
  31 class MESSAGE_CENTER_EXPORT BoundedLabel : public views::View {
  32  public:
  33   BoundedLabel(const string16& text, gfx::Font font, size_t line_limit);
  34   BoundedLabel(const string16& text, size_t line_limit);
  35   virtual ~BoundedLabel();
  36
  37   void SetLineLimit(size_t lines);
  38   size_t GetLinesForWidth(int width);
  39   size_t GetPreferredLines();
  40   size_t GetActualLines();
  41
  42   void SetColors(SkColor textColor, SkColor backgroundColor);
  43
  44   // Overridden from views::View.
  45   virtual int GetBaseline() const OVERRIDE;
  46   virtual gfx::Size GetPreferredSize() OVERRIDE;
  47   virtual int GetHeightForWidth(int w) OVERRIDE;
  48   virtual void Paint(gfx::Canvas* canvas) OVERRIDE;
  49   virtual bool HitTestRect(const gfx::Rect& rect) const OVERRIDE;
  50   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
  51
  52  protected:
  53   // Overridden from views::View.
  54   virtual void OnBoundsChanged(const gfx::Rect& previous_bounds) OVERRIDE;
  55   virtual void OnNativeThemeChanged(const ui::NativeTheme* theme) OVERRIDE;
  56
  57  private:
  58   friend class BoundedLabelTest;
  59
  60   string16 GetWrappedTextForTest(int width, size_t line_limit);
  61
  62   scoped_ptr<InnerBoundedLabel> label_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(BoundedLabel);
  65 };
  66
  67 }  // namespace message_center
  68
  69 #endif  // UI_MESSAGE_CENTER_BOUNDED_LABEL_H_