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 ScrollbarThemeGtk_h
27#define ScrollbarThemeGtk_h
28
29#include "ScrollbarThemeComposite.h"
30
31namespace WebCore {
32
33class Scrollbar;
34
35class ScrollbarThemeGtk : public ScrollbarThemeComposite {
36public:
37    ScrollbarThemeGtk();
38    virtual ~ScrollbarThemeGtk();
39
40    virtual bool hasButtons(ScrollbarThemeClient*) { return true; }
41    virtual bool hasThumb(ScrollbarThemeClient*);
42    virtual IntRect backButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool);
43    virtual IntRect forwardButtonRect(ScrollbarThemeClient*, ScrollbarPart, bool);
44    virtual IntRect trackRect(ScrollbarThemeClient*, bool);
45    IntRect thumbRect(ScrollbarThemeClient*, const IntRect& unconstrainedTrackRect);
46    bool paint(ScrollbarThemeClient*, GraphicsContext*, const IntRect& damageRect);
47    void paintScrollbarBackground(GraphicsContext*, ScrollbarThemeClient*);
48    void paintTrackBackground(GraphicsContext*, ScrollbarThemeClient*, const IntRect&);
49    void paintThumb(GraphicsContext*, ScrollbarThemeClient*, const IntRect&);
50    virtual void paintButton(GraphicsContext*, ScrollbarThemeClient*, const IntRect&, ScrollbarPart);
51    virtual bool shouldCenterOnThumb(ScrollbarThemeClient*, const PlatformMouseEvent&);
52    virtual int scrollbarThickness(ScrollbarControlSize);
53    virtual IntSize buttonSize(ScrollbarThemeClient*);
54    virtual int minimumThumbLength(ScrollbarThemeClient*);
55
56    // TODO: These are the default GTK+ values. At some point we should pull these from the theme itself.
57    virtual double initialAutoscrollTimerDelay() { return 0.20; }
58    virtual double autoscrollTimerDelay() { return 0.02; }
59    void updateThemeProperties();
60    void updateScrollbarsFrameThickness();
61    void registerScrollbar(ScrollbarThemeClient*);
62    void unregisterScrollbar(ScrollbarThemeClient*);
63
64protected:
65#ifndef GTK_API_VERSION_2
66    GtkStyleContext* m_context;
67#endif
68    int m_thumbFatness;
69    int m_troughBorderWidth;
70    int m_stepperSize;
71    int m_stepperSpacing;
72    int m_minThumbLength;
73    gboolean m_troughUnderSteppers;
74    gboolean m_hasForwardButtonStartPart;
75    gboolean m_hasForwardButtonEndPart;
76    gboolean m_hasBackButtonStartPart;
77    gboolean m_hasBackButtonEndPart;
78};
79
80}
81#endif
82