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| 1 /* | |
| 2 * Copyright (C) 2008 Apple Inc. All Rights Reserved. | |
| 3 * | |
| 4 * Redistribution and use in source and binary forms, with or without | |
| 5 * modification, are permitted provided that the following conditions | |
| 6 * are met: | |
| 7 * 1. Redistributions of source code must retain the above copyright | |
| 8 * notice, this list of conditions and the following disclaimer. | |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer in the | |
| 11 * documentation and/or other materials provided with the distribution. | |
| 12 * | |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #ifndef ScrollbarTheme_h | |
| 27 #define ScrollbarTheme_h | |
| 28 | |
| 29 #include "core/platform/graphics/GraphicsContext.h" | |
| 30 #include "platform/geometry/IntRect.h" | |
| 31 #include "platform/scroll/ScrollTypes.h" | |
| 32 | |
| 33 namespace WebCore { | |
| 34 | |
| 35 class PlatformMouseEvent; | |
| 36 class ScrollbarThemeClient; | |
| 37 class ScrollView; | |
| 38 | |
| 39 class ScrollbarTheme { | |
| 40 WTF_MAKE_NONCOPYABLE(ScrollbarTheme); WTF_MAKE_FAST_ALLOCATED; | |
| 41 public: | |
| 42 ScrollbarTheme() { } | |
| 43 virtual ~ScrollbarTheme() { } | |
| 44 | |
| 45 virtual void updateEnabledState(ScrollbarThemeClient*) { } | |
| 46 | |
| 47 virtual bool paint(ScrollbarThemeClient*, GraphicsContext*, const IntRect& d
amageRect); | |
| 48 virtual ScrollbarPart hitTest(ScrollbarThemeClient*, const IntPoint&); | |
| 49 | |
| 50 virtual int scrollbarThickness(ScrollbarControlSize = RegularScrollbar) { re
turn 0; } | |
| 51 | |
| 52 virtual ScrollbarButtonsPlacement buttonsPlacement() const { return Scrollba
rButtonsSingle; } | |
| 53 | |
| 54 virtual bool supportsControlTints() const { return false; } | |
| 55 virtual bool usesOverlayScrollbars() const { return false; } | |
| 56 virtual void updateScrollbarOverlayStyle(ScrollbarThemeClient*) { } | |
| 57 | |
| 58 virtual bool invalidateOnMouseEnterExit() { return false; } | |
| 59 | |
| 60 void invalidateParts(ScrollbarThemeClient* scrollbar, ScrollbarControlPartMa
sk mask) | |
| 61 { | |
| 62 if (mask & BackButtonStartPart) | |
| 63 invalidatePart(scrollbar, BackButtonStartPart); | |
| 64 if (mask & ForwardButtonStartPart) | |
| 65 invalidatePart(scrollbar, ForwardButtonStartPart); | |
| 66 if (mask & BackTrackPart) | |
| 67 invalidatePart(scrollbar, BackTrackPart); | |
| 68 if (mask & ThumbPart) | |
| 69 invalidatePart(scrollbar, ThumbPart); | |
| 70 if (mask & ForwardTrackPart) | |
| 71 invalidatePart(scrollbar, ForwardTrackPart); | |
| 72 if (mask & BackButtonEndPart) | |
| 73 invalidatePart(scrollbar, BackButtonEndPart); | |
| 74 if (mask & ForwardButtonEndPart) | |
| 75 invalidatePart(scrollbar, ForwardButtonEndPart); | |
| 76 } | |
| 77 | |
| 78 virtual void invalidatePart(ScrollbarThemeClient*, ScrollbarPart); | |
| 79 | |
| 80 virtual void paintScrollCorner(GraphicsContext*, const IntRect& cornerRect); | |
| 81 | |
| 82 virtual void paintTickmarks(GraphicsContext*, ScrollbarThemeClient*, const I
ntRect&) { } | |
| 83 virtual void paintOverhangBackground(GraphicsContext*, const IntRect&, const
IntRect&, const IntRect&); | |
| 84 virtual void paintOverhangShadows(GraphicsContext*, const IntSize&, const In
tRect&, const IntRect&, const IntRect&) { } | |
| 85 | |
| 86 virtual bool shouldCenterOnThumb(ScrollbarThemeClient*, const PlatformMouseE
vent&) { return false; } | |
| 87 virtual bool shouldSnapBackToDragOrigin(ScrollbarThemeClient*, const Platfor
mMouseEvent&) { return false; } | |
| 88 virtual bool shouldDragDocumentInsteadOfThumb(ScrollbarThemeClient*, const P
latformMouseEvent&) { return false; } | |
| 89 | |
| 90 // The position of the thumb relative to the track. | |
| 91 virtual int thumbPosition(ScrollbarThemeClient*); | |
| 92 // The length of the thumb along the axis of the scrollbar. | |
| 93 virtual int thumbLength(ScrollbarThemeClient*); | |
| 94 // The position of the track relative to the scrollbar. | |
| 95 virtual int trackPosition(ScrollbarThemeClient*); | |
| 96 // The length of the track along the axis of the scrollbar. | |
| 97 virtual int trackLength(ScrollbarThemeClient*); | |
| 98 | |
| 99 virtual bool hasButtons(ScrollbarThemeClient*) = 0; | |
| 100 virtual bool hasThumb(ScrollbarThemeClient*) = 0; | |
| 101 | |
| 102 virtual IntRect backButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool pa
inting = false) = 0; | |
| 103 virtual IntRect forwardButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool
painting = false) = 0; | |
| 104 virtual IntRect trackRect(ScrollbarThemeClient*, bool painting = false) = 0; | |
| 105 virtual IntRect thumbRect(ScrollbarThemeClient*); | |
| 106 virtual int thumbThickness(ScrollbarThemeClient*); | |
| 107 | |
| 108 virtual int minimumThumbLength(ScrollbarThemeClient*); | |
| 109 | |
| 110 virtual void splitTrack(ScrollbarThemeClient*, const IntRect& track, IntRect
& startTrack, IntRect& thumb, IntRect& endTrack); | |
| 111 | |
| 112 virtual void paintScrollbarBackground(GraphicsContext*, ScrollbarThemeClient
*) { } | |
| 113 virtual void paintTrackBackground(GraphicsContext*, ScrollbarThemeClient*, c
onst IntRect&) { } | |
| 114 virtual void paintTrackPiece(GraphicsContext*, ScrollbarThemeClient*, const
IntRect&, ScrollbarPart) { } | |
| 115 virtual void paintButton(GraphicsContext*, ScrollbarThemeClient*, const IntR
ect&, ScrollbarPart) { } | |
| 116 virtual void paintThumb(GraphicsContext*, ScrollbarThemeClient*, const IntRe
ct&) { } | |
| 117 | |
| 118 virtual int maxOverlapBetweenPages() { return std::numeric_limits<int>::max(
); } | |
| 119 | |
| 120 virtual double initialAutoscrollTimerDelay() { return 0.25; } | |
| 121 virtual double autoscrollTimerDelay() { return 0.05; } | |
| 122 | |
| 123 virtual IntRect constrainTrackRectToTrackPieces(ScrollbarThemeClient*, const
IntRect& rect) { return rect; } | |
| 124 | |
| 125 virtual void registerScrollbar(ScrollbarThemeClient*) { } | |
| 126 virtual void unregisterScrollbar(ScrollbarThemeClient*) { } | |
| 127 | |
| 128 virtual bool isMockTheme() const { return false; } | |
| 129 | |
| 130 static ScrollbarTheme* theme(); | |
| 131 | |
| 132 static void setMockScrollbarsEnabled(bool flag); | |
| 133 static bool mockScrollbarsEnabled(); | |
| 134 | |
| 135 private: | |
| 136 static ScrollbarTheme* nativeTheme(); // Must be implemented to return the c
orrect theme subclass. | |
| 137 static bool gMockScrollbarsEnabled; | |
| 138 }; | |
| 139 | |
| 140 } | |
| 141 #endif | |
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Chromium Code Reviews
Issue 99103006:
Moving GraphicsContext and dependencies from core to platform. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk