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| 1 // Copyright (c) 2012 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_BUTTON_LABEL_BUTTON_H_ | |
| 6 #define UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_H_ | |
| 7 | |
| 8 #include "base/compiler_specific.h" | |
| 9 #include "base/memory/scoped_ptr.h" | |
| 10 #include "third_party/skia/include/core/SkColor.h" | |
| 11 #include "ui/gfx/image/image_skia.h" | |
| 12 #include "ui/views/controls/button/custom_button.h" | |
| 13 #include "ui/views/controls/image_view.h" | |
| 14 #include "ui/views/controls/label.h" | |
| 15 #include "ui/views/native_theme_delegate.h" | |
| 16 | |
| 17 namespace views { | |
| 18 | |
| 19 class LabelButtonBorder; | |
| 20 class Painter; | |
| 21 | |
| 22 // LabelButton is a button with text and an icon, it's not focusable by default. | |
| 23 class VIEWS_EXPORT LabelButton : public CustomButton, | |
| 24 public NativeThemeDelegate { | |
| 25 public: | |
| 26 // The length of the hover fade animation. | |
| 27 static const int kHoverAnimationDurationMs; | |
| 28 | |
| 29 static const char kViewClassName[]; | |
| 30 | |
| 31 LabelButton(ButtonListener* listener, const base::string16& text); | |
| 32 virtual ~LabelButton(); | |
| 33 | |
| 34 // Get or set the image shown for the specified button state. | |
| 35 // GetImage returns the image for STATE_NORMAL if the state's image is empty. | |
| 36 virtual const gfx::ImageSkia& GetImage(ButtonState for_state); | |
| 37 void SetImage(ButtonState for_state, const gfx::ImageSkia& image); | |
| 38 | |
| 39 // Get or set the text shown on the button. | |
| 40 const base::string16& GetText() const; | |
| 41 virtual void SetText(const base::string16& text); | |
| 42 | |
| 43 // Set the text color shown for the specified button state. | |
| 44 void SetTextColor(ButtonState for_state, SkColor color); | |
| 45 | |
| 46 // Set drop shadows underneath the text. | |
| 47 void SetTextShadows(const gfx::ShadowValues& shadows); | |
| 48 | |
| 49 // Sets whether subpixel rendering is used on the label. | |
| 50 void SetTextSubpixelRenderingEnabled(bool enabled); | |
| 51 | |
| 52 // Get or set the text's multi-line property to break on '\n', etc. | |
| 53 bool GetTextMultiLine() const; | |
| 54 void SetTextMultiLine(bool text_multi_line); | |
| 55 | |
| 56 // Get or set the font list used by this button. | |
| 57 const gfx::FontList& GetFontList() const; | |
| 58 void SetFontList(const gfx::FontList& font_list); | |
| 59 | |
| 60 // Set the elide behavior of this button. | |
| 61 void SetElideBehavior(gfx::ElideBehavior elide_behavior); | |
| 62 | |
| 63 // Get or set the horizontal alignment used for the button; reversed in RTL. | |
| 64 // The optional image will lead the text, unless the button is right-aligned. | |
| 65 gfx::HorizontalAlignment GetHorizontalAlignment() const; | |
| 66 void SetHorizontalAlignment(gfx::HorizontalAlignment alignment); | |
| 67 | |
| 68 // Call SetMinSize(gfx::Size()) to clear the monotonically increasing size. | |
| 69 void SetMinSize(const gfx::Size& min_size); | |
| 70 void SetMaxSize(const gfx::Size& max_size); | |
| 71 | |
| 72 // Get or set the option to handle the return key; false by default. | |
| 73 bool is_default() const { return is_default_; } | |
| 74 void SetIsDefault(bool is_default); | |
| 75 | |
| 76 // Get or set the button's overall style; the default is |STYLE_TEXTBUTTON|. | |
| 77 ButtonStyle style() const { return style_; } | |
| 78 void SetStyle(ButtonStyle style); | |
| 79 | |
| 80 // Set the spacing between the image and the text. Shrinking the spacing | |
| 81 // will not shrink the overall button size, as it is monotonically increasing. | |
| 82 // Call SetMinSize(gfx::Size()) to clear the size if needed. | |
| 83 void SetImageLabelSpacing(int spacing); | |
| 84 | |
| 85 void SetFocusPainter(scoped_ptr<Painter> focus_painter); | |
| 86 Painter* focus_painter() { return focus_painter_.get(); } | |
| 87 | |
| 88 // View: | |
| 89 virtual void SetBorder(scoped_ptr<Border> border) override; | |
| 90 virtual gfx::Size GetPreferredSize() const override; | |
| 91 virtual int GetHeightForWidth(int w) const override; | |
| 92 virtual void Layout() override; | |
| 93 virtual const char* GetClassName() const override; | |
| 94 | |
| 95 protected: | |
| 96 ImageView* image() const { return image_; } | |
| 97 Label* label() const { return label_; } | |
| 98 | |
| 99 // Returns the available area for the label and image. Subclasses can change | |
| 100 // these bounds if they need room to do manual painting. | |
| 101 virtual gfx::Rect GetChildAreaBounds(); | |
| 102 | |
| 103 // View: | |
| 104 virtual void OnPaint(gfx::Canvas* canvas) override; | |
| 105 virtual void OnFocus() override; | |
| 106 virtual void OnBlur() override; | |
| 107 virtual void OnNativeThemeChanged(const ui::NativeTheme* theme) override; | |
| 108 | |
| 109 // Fill |params| with information about the button. | |
| 110 virtual void GetExtraParams(ui::NativeTheme::ExtraParams* params) const; | |
| 111 | |
| 112 // Resets colors from the NativeTheme, explicitly set colors are unchanged. | |
| 113 virtual void ResetColorsFromNativeTheme(); | |
| 114 | |
| 115 // Creates the default border for this button. This can be overridden by | |
| 116 // subclasses or by LinuxUI. | |
| 117 virtual scoped_ptr<LabelButtonBorder> CreateDefaultBorder() const; | |
| 118 | |
| 119 // Updates the image view to contain the appropriate button state image. | |
| 120 void UpdateImage(); | |
| 121 | |
| 122 // Updates the border as per the NativeTheme, unless a different border was | |
| 123 // set with SetBorder. | |
| 124 void UpdateThemedBorder(); | |
| 125 | |
| 126 // NativeThemeDelegate: | |
| 127 virtual gfx::Rect GetThemePaintRect() const override; | |
| 128 | |
| 129 private: | |
| 130 FRIEND_TEST_ALL_PREFIXES(LabelButtonTest, Init); | |
| 131 FRIEND_TEST_ALL_PREFIXES(LabelButtonTest, Label); | |
| 132 FRIEND_TEST_ALL_PREFIXES(LabelButtonTest, Image); | |
| 133 FRIEND_TEST_ALL_PREFIXES(LabelButtonTest, LabelAndImage); | |
| 134 FRIEND_TEST_ALL_PREFIXES(LabelButtonTest, FontList); | |
| 135 | |
| 136 // CustomButton: | |
| 137 virtual void StateChanged() override; | |
| 138 | |
| 139 // View: | |
| 140 virtual void ChildPreferredSizeChanged(View* child) override; | |
| 141 | |
| 142 // NativeThemeDelegate: | |
| 143 virtual ui::NativeTheme::Part GetThemePart() const override; | |
| 144 virtual ui::NativeTheme::State GetThemeState( | |
| 145 ui::NativeTheme::ExtraParams* params) const override; | |
| 146 virtual const gfx::Animation* GetThemeAnimation() const override; | |
| 147 virtual ui::NativeTheme::State GetBackgroundThemeState( | |
| 148 ui::NativeTheme::ExtraParams* params) const override; | |
| 149 virtual ui::NativeTheme::State GetForegroundThemeState( | |
| 150 ui::NativeTheme::ExtraParams* params) const override; | |
| 151 | |
| 152 // Resets |cached_preferred_size_| and marks |cached_preferred_size_valid_| | |
| 153 // as false. | |
| 154 void ResetCachedPreferredSize(); | |
| 155 | |
| 156 // The image and label shown in the button. | |
| 157 ImageView* image_; | |
| 158 Label* label_; | |
| 159 | |
| 160 // The cached font lists in the normal and bold style. | |
| 161 gfx::FontList cached_normal_font_list_; | |
| 162 gfx::FontList cached_bold_font_list_; | |
| 163 | |
| 164 // The images and colors for each button state. | |
| 165 gfx::ImageSkia button_state_images_[STATE_COUNT]; | |
| 166 SkColor button_state_colors_[STATE_COUNT]; | |
| 167 | |
| 168 // Used to track whether SetTextColor() has been invoked. | |
| 169 bool explicitly_set_colors_[STATE_COUNT]; | |
| 170 | |
| 171 // |min_size_| increases monotonically with the preferred size. | |
| 172 mutable gfx::Size min_size_; | |
| 173 // |max_size_| may be set to clamp the preferred size. | |
| 174 gfx::Size max_size_; | |
| 175 | |
| 176 // Cache the last computed preferred size. | |
| 177 mutable gfx::Size cached_preferred_size_; | |
| 178 mutable bool cached_preferred_size_valid_; | |
| 179 | |
| 180 // Flag indicating default handling of the return key via an accelerator. | |
| 181 // Whether or not the button appears or behaves as the default button in its | |
| 182 // current context; | |
| 183 bool is_default_; | |
| 184 | |
| 185 // The button's overall style. | |
| 186 ButtonStyle style_; | |
| 187 | |
| 188 // True if current border was set by UpdateThemedBorder. Defaults to true. | |
| 189 bool border_is_themed_border_; | |
| 190 | |
| 191 // Spacing between the image and the text. | |
| 192 int image_label_spacing_; | |
| 193 | |
| 194 scoped_ptr<Painter> focus_painter_; | |
| 195 | |
| 196 DISALLOW_COPY_AND_ASSIGN(LabelButton); | |
| 197 }; | |
| 198 | |
| 199 } // namespace views | |
| 200 | |
| 201 #endif // UI_VIEWS_CONTROLS_BUTTON_LABEL_BUTTON_H_ | |
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