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 class FontList; 18 } 19 20 namespace message_center { 21 22 class InnerBoundedLabel; 23 24 namespace test { 25 class BoundedLabelTest; 26 } 27 28 // BoundedLabels display left aligned text up to a maximum number of lines, with 29 // ellipsis at the end of the last line for any omitted text. BoundedLabel is a 30 // direct subclass of views::Views rather than a subclass of views::Label 31 // to avoid exposing some of views::Label's methods that can't be made to work 32 // with BoundedLabel. See the description of InnerBoundedLabel in the 33 // bounded_label.cc file for details. 34 class MESSAGE_CENTER_EXPORT BoundedLabel : public views::View { 35 public: 36 BoundedLabel(const base::string16& text, const gfx::FontList& font_list); 37 BoundedLabel(const base::string16& text); 38 virtual ~BoundedLabel(); 39 40 void SetColors(SkColor textColor, SkColor backgroundColor); 41 void SetLineHeight(int height); // Pass in 0 for default height. 42 void SetLineLimit(int lines); // Pass in -1 for no limit. 43 void SetText(const base::string16& text); // Additionally clears caches. 44 45 int GetLineHeight() const; 46 int GetLineLimit() const; 47 48 // Pass in a -1 width to use the preferred width, a -1 limit to skip limits. 49 int GetLinesForWidthAndLimit(int width, int limit); 50 gfx::Size GetSizeForWidthAndLines(int width, int lines); 51 52 // views::View: 53 virtual int GetBaseline() const OVERRIDE; 54 virtual gfx::Size GetPreferredSize() const OVERRIDE; 55 virtual int GetHeightForWidth(int width) const OVERRIDE; 56 virtual void Paint(gfx::Canvas* canvas, 57 const views::CullSet& cull_set) OVERRIDE; 58 virtual bool CanProcessEventsWithinSubtree() const OVERRIDE; 59 virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE; 60 61 protected: 62 // Overridden from views::View. 63 virtual void OnBoundsChanged(const gfx::Rect& previous_bounds) OVERRIDE; 64 virtual void OnNativeThemeChanged(const ui::NativeTheme* theme) OVERRIDE; 65 66 private: 67 friend class test::BoundedLabelTest; 68 69 base::string16 GetWrappedTextForTest(int width, int lines); 70 71 scoped_ptr<InnerBoundedLabel> label_; 72 int line_limit_; 73 74 DISALLOW_COPY_AND_ASSIGN(BoundedLabel); 75 }; 76 77 } // namespace message_center 78 79 #endif // UI_MESSAGE_CENTER_BOUNDED_LABEL_H_ 80
