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25 #ifndef WebScrollbar_h
26 #define WebScrollbar_h
31 #include "WebVector.h"
33 #include "wtf/PassOwnPtr.h"
42 // A const accessor interface for a WebKit scrollbar
43 class BLINK_PLATFORM_EXPORT WebScrollbar {
50 enum ScrollDirection {
55 enum ScrollGranularity {
62 enum ScrollbarControlSize {
69 BackButtonStartPart = 1,
70 ForwardButtonStartPart = 1 << 1,
71 BackTrackPart = 1 << 2,
73 ForwardTrackPart = 1 << 4,
74 BackButtonEndPart = 1 << 5,
75 ForwardButtonEndPart = 1 << 6,
76 ScrollbarBGPart = 1 << 7,
81 enum ScrollbarOverlayStyle {
82 ScrollbarOverlayStyleDefault,
83 ScrollbarOverlayStyleDark,
84 ScrollbarOverlayStyleLight
87 virtual ~WebScrollbar() { }
89 // Return true if this is an overlay scrollbar.
90 virtual bool isOverlay() const = 0;
92 // Gets the current value (i.e. position inside the region).
93 virtual int value() const = 0;
95 virtual WebPoint location() const = 0;
96 virtual WebSize size() const = 0;
97 virtual bool enabled() const = 0;
98 virtual int maximum() const = 0;
99 virtual int totalSize() const = 0;
100 virtual bool isScrollViewScrollbar() const = 0;
101 virtual bool isScrollableAreaActive() const = 0;
102 virtual void getTickmarks(WebVector<WebRect>& tickmarks) const = 0;
103 virtual ScrollbarControlSize controlSize() const = 0;
104 virtual ScrollbarPart pressedPart() const = 0;
105 virtual ScrollbarPart hoveredPart() const = 0;
106 virtual ScrollbarOverlayStyle scrollbarOverlayStyle() const = 0;
107 virtual bool isCustomScrollbar() const = 0;
108 virtual Orientation orientation() const = 0;
109 virtual bool isLeftSideVerticalScrollbar() const = 0;
110 virtual bool isAlphaLocked() const { return false; }
111 virtual void setIsAlphaLocked(bool) { }