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31 #ifndef WebThemeEngine_h
32 #define WebThemeEngine_h
34 #include "WebCanvas.h"
42 class WebThemeEngine {
44 // The current state of the associated Part.
47 StateHover, // non-Apple
48 StateNormal, // non-Apple
50 StateFocused, // non-Apple
51 StateReadonly, // non-Apple
52 StateInactive, // Apple-specific
53 StateActive, // Apple-specific
56 // The UI part which is being accessed.
58 // ScrollbarTheme parts
59 PartScrollbarDownArrow,
60 PartScrollbarLeftArrow,
61 PartScrollbarRightArrow,
63 PartScrollbarHorizontalThumb,
64 PartScrollbarVerticalThumb,
65 PartScrollbarHorizontalTrack,
66 PartScrollbarVerticalTrack,
81 // Extra parameters for drawing the PartScrollbarHorizontalTrack and
82 // PartScrollbarVerticalTrack.
83 struct ScrollbarTrackExtraParams {
84 bool isBack; // Whether this is the 'back' part or the 'forward' part.
86 // The bounds of the entire track, as opposed to the part being painted.
93 // Extra parameters for PartCheckbox, PartPushButton and PartRadio.
94 struct ButtonExtraParams {
96 bool indeterminate; // Whether the button state is indeterminate.
97 bool isDefault; // Whether the button is default button.
99 WebColor backgroundColor;
102 // Extra parameters for PartTextField
103 struct TextFieldExtraParams {
106 WebColor backgroundColor;
109 // Extra parameters for PartMenuList
110 struct MenuListExtraParams {
112 bool hasBorderRadius;
116 WebColor backgroundColor;
117 bool fillContentArea;
120 // Extra parameters for PartSliderTrack and PartSliderThumb
121 struct SliderExtraParams {
126 // Extra parameters for PartInnerSpinButton
127 struct InnerSpinButtonExtraParams {
132 // Extra parameters for PartProgressBar
133 struct ProgressBarExtraParams {
142 ScrollbarTrackExtraParams scrollbarTrack;
143 ButtonExtraParams button;
144 TextFieldExtraParams textField;
145 MenuListExtraParams menuList;
146 SliderExtraParams slider;
147 InnerSpinButtonExtraParams innerSpin;
148 ProgressBarExtraParams progressBar;
151 // Gets the size of the given theme part. For variable sized items
152 // like vertical scrollbar thumbs, the width will be the required width of
153 // the track while the height will be the minimum height.
154 virtual WebSize getSize(Part) { return WebSize(); }
155 // Paint the given the given theme part.
156 virtual void paint(WebCanvas*, Part, State, const WebRect&, const ExtraParams*) { }