1 /*
2 * Copyright (C) 2007, 2008 Apple Inc. All Rights Reserved.
3 * Copyright (C) 2007 Staikos Computing Services Inc. <info@staikos.net>
4 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
16 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
18 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
19 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
22 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
23 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "config.h"
29 #include "ScrollbarThemeQt.h"
30
31 #include "GraphicsContext.h"
32 #include "PlatformMouseEvent.h"
33 #include "RenderThemeQt.h"
34 #include "ScrollView.h"
35 #include "Scrollbar.h"
36
37 #include <QApplication>
38 #ifdef Q_WS_MAC
39 #include <QMacStyle>
40 #endif
41 #include <QMenu>
42 #include <QPainter>
43 #include <QStyle>
44 #include <QStyleOptionSlider>
45
46 namespace WebCore {
47
nativeTheme()48 ScrollbarTheme* ScrollbarTheme::nativeTheme()
49 {
50 static ScrollbarThemeQt theme;
51 return &theme;
52 }
53
~ScrollbarThemeQt()54 ScrollbarThemeQt::~ScrollbarThemeQt()
55 {
56 }
57
scPart(const ScrollbarPart & part)58 static QStyle::SubControl scPart(const ScrollbarPart& part)
59 {
60 switch (part) {
61 case NoPart:
62 return QStyle::SC_None;
63 case BackButtonStartPart:
64 case BackButtonEndPart:
65 return QStyle::SC_ScrollBarSubLine;
66 case BackTrackPart:
67 return QStyle::SC_ScrollBarSubPage;
68 case ThumbPart:
69 return QStyle::SC_ScrollBarSlider;
70 case ForwardTrackPart:
71 return QStyle::SC_ScrollBarAddPage;
72 case ForwardButtonStartPart:
73 case ForwardButtonEndPart:
74 return QStyle::SC_ScrollBarAddLine;
75 }
76
77 return QStyle::SC_None;
78 }
79
scrollbarPart(const QStyle::SubControl & sc)80 static ScrollbarPart scrollbarPart(const QStyle::SubControl& sc)
81 {
82 switch (sc) {
83 case QStyle::SC_None:
84 return NoPart;
85 case QStyle::SC_ScrollBarSubLine:
86 return BackButtonStartPart;
87 case QStyle::SC_ScrollBarSubPage:
88 return BackTrackPart;
89 case QStyle::SC_ScrollBarSlider:
90 return ThumbPart;
91 case QStyle::SC_ScrollBarAddPage:
92 return ForwardTrackPart;
93 case QStyle::SC_ScrollBarAddLine:
94 return ForwardButtonStartPart;
95 }
96 return NoPart;
97 }
98
styleOptionSlider(Scrollbar * scrollbar,QWidget * widget=0)99 static QStyleOptionSlider* styleOptionSlider(Scrollbar* scrollbar, QWidget* widget = 0)
100 {
101 static QStyleOptionSlider opt;
102 if (widget)
103 opt.initFrom(widget);
104 else
105 opt.state |= QStyle::State_Active;
106
107 opt.state &= ~QStyle::State_HasFocus;
108
109 opt.rect = scrollbar->frameRect();
110 if (scrollbar->enabled())
111 opt.state |= QStyle::State_Enabled;
112 if (scrollbar->controlSize() != RegularScrollbar)
113 opt.state |= QStyle::State_Mini;
114 opt.orientation = (scrollbar->orientation() == VerticalScrollbar) ? Qt::Vertical : Qt::Horizontal;
115
116 if (scrollbar->orientation() == HorizontalScrollbar)
117 opt.state |= QStyle::State_Horizontal;
118 else
119 opt.state &= ~QStyle::State_Horizontal;
120
121 opt.sliderValue = scrollbar->value();
122 opt.sliderPosition = opt.sliderValue;
123 opt.pageStep = scrollbar->pageStep();
124 opt.singleStep = scrollbar->lineStep();
125 opt.minimum = 0;
126 opt.maximum = qMax(0, scrollbar->maximum());
127 ScrollbarPart pressedPart = scrollbar->pressedPart();
128 ScrollbarPart hoveredPart = scrollbar->hoveredPart();
129 if (pressedPart != NoPart) {
130 opt.activeSubControls = scPart(scrollbar->pressedPart());
131 if (pressedPart == BackButtonStartPart || pressedPart == ForwardButtonStartPart
132 || pressedPart == BackButtonEndPart || pressedPart == ForwardButtonEndPart
133 || pressedPart == ThumbPart)
134 opt.state |= QStyle::State_Sunken;
135 } else
136 opt.activeSubControls = scPart(hoveredPart);
137 if (hoveredPart != NoPart)
138 opt.state |= QStyle::State_MouseOver;
139 return &opt;
140 }
141
paint(Scrollbar * scrollbar,GraphicsContext * graphicsContext,const IntRect & damageRect)142 bool ScrollbarThemeQt::paint(Scrollbar* scrollbar, GraphicsContext* graphicsContext, const IntRect& damageRect)
143 {
144 if (graphicsContext->updatingControlTints()) {
145 scrollbar->invalidateRect(damageRect);
146 return false;
147 }
148
149 StylePainter p(this, graphicsContext);
150 if (!p.isValid())
151 return true;
152
153 p.painter->save();
154 QStyleOptionSlider* opt = styleOptionSlider(scrollbar, p.widget);
155
156 p.painter->setClipRect(opt->rect.intersected(damageRect), Qt::IntersectClip);
157
158 #ifdef Q_WS_MAC
159 // FIXME: We also need to check the widget style but today ScrollbarTheme is not aware of the page so we
160 // can't get the widget.
161 if (qobject_cast<QMacStyle*>(style()))
162 p.drawComplexControl(QStyle::CC_ScrollBar, *opt);
163 else
164 #endif
165 {
166 // The QStyle expects the background to be already filled.
167 p.painter->fillRect(opt->rect, opt->palette.background());
168
169 const QPoint topLeft = opt->rect.topLeft();
170 p.painter->translate(topLeft);
171 opt->rect.moveTo(QPoint(0, 0));
172 p.drawComplexControl(QStyle::CC_ScrollBar, *opt);
173 opt->rect.moveTo(topLeft);
174 }
175 p.painter->restore();
176
177 return true;
178 }
179
hitTest(Scrollbar * scrollbar,const PlatformMouseEvent & evt)180 ScrollbarPart ScrollbarThemeQt::hitTest(Scrollbar* scrollbar, const PlatformMouseEvent& evt)
181 {
182 QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
183 const QPoint pos = scrollbar->convertFromContainingWindow(evt.pos());
184 opt->rect.moveTo(QPoint(0, 0));
185 QStyle::SubControl sc = style()->hitTestComplexControl(QStyle::CC_ScrollBar, opt, pos, 0);
186 return scrollbarPart(sc);
187 }
188
shouldCenterOnThumb(Scrollbar *,const PlatformMouseEvent & evt)189 bool ScrollbarThemeQt::shouldCenterOnThumb(Scrollbar*, const PlatformMouseEvent& evt)
190 {
191 // Middle click centers slider thumb (if supported).
192 return style()->styleHint(QStyle::SH_ScrollBar_MiddleClickAbsolutePosition) && evt.button() == MiddleButton;
193 }
194
invalidatePart(Scrollbar * scrollbar,ScrollbarPart)195 void ScrollbarThemeQt::invalidatePart(Scrollbar* scrollbar, ScrollbarPart)
196 {
197 // FIXME: Do more precise invalidation.
198 scrollbar->invalidate();
199 }
200
scrollbarThickness(ScrollbarControlSize controlSize)201 int ScrollbarThemeQt::scrollbarThickness(ScrollbarControlSize controlSize)
202 {
203 #if USE(QT_MOBILE_THEME)
204 return 0;
205 #endif
206 QStyleOptionSlider o;
207 o.orientation = Qt::Vertical;
208 o.state &= ~QStyle::State_Horizontal;
209 if (controlSize != RegularScrollbar)
210 o.state |= QStyle::State_Mini;
211 return style()->pixelMetric(QStyle::PM_ScrollBarExtent, &o, 0);
212 }
213
thumbPosition(Scrollbar * scrollbar)214 int ScrollbarThemeQt::thumbPosition(Scrollbar* scrollbar)
215 {
216 if (scrollbar->enabled())
217 return (int)((float)scrollbar->currentPos() * (trackLength(scrollbar) - thumbLength(scrollbar)) / scrollbar->maximum());
218 return 0;
219 }
220
thumbLength(Scrollbar * scrollbar)221 int ScrollbarThemeQt::thumbLength(Scrollbar* scrollbar)
222 {
223 QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
224 IntRect thumb = style()->subControlRect(QStyle::CC_ScrollBar, opt, QStyle::SC_ScrollBarSlider, 0);
225 return scrollbar->orientation() == HorizontalScrollbar ? thumb.width() : thumb.height();
226 }
227
trackPosition(Scrollbar * scrollbar)228 int ScrollbarThemeQt::trackPosition(Scrollbar* scrollbar)
229 {
230 QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
231 IntRect track = style()->subControlRect(QStyle::CC_ScrollBar, opt, QStyle::SC_ScrollBarGroove, 0);
232 return scrollbar->orientation() == HorizontalScrollbar ? track.x() - scrollbar->x() : track.y() - scrollbar->y();
233 }
234
trackLength(Scrollbar * scrollbar)235 int ScrollbarThemeQt::trackLength(Scrollbar* scrollbar)
236 {
237 QStyleOptionSlider* opt = styleOptionSlider(scrollbar);
238 IntRect track = style()->subControlRect(QStyle::CC_ScrollBar, opt, QStyle::SC_ScrollBarGroove, 0);
239 return scrollbar->orientation() == HorizontalScrollbar ? track.width() : track.height();
240 }
241
paintScrollCorner(ScrollView * scrollView,GraphicsContext * context,const IntRect & rect)242 void ScrollbarThemeQt::paintScrollCorner(ScrollView* scrollView, GraphicsContext* context, const IntRect& rect)
243 {
244 if (context->updatingControlTints()) {
245 scrollView->invalidateRect(rect);
246 return;
247 }
248
249 StylePainter p(this, context);
250 if (!p.isValid())
251 return;
252
253 QStyleOption option;
254 option.rect = rect;
255 p.drawPrimitive(QStyle::PE_PanelScrollAreaCorner, option);
256 }
257
style() const258 QStyle* ScrollbarThemeQt::style() const
259 {
260 return QApplication::style();
261 }
262
263 }
264
265