qscrollbar.cpp

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33-
34#include "qapplication.h"-
35#include "qcursor.h"-
36#include "qevent.h"-
37#include "qpainter.h"-
38#include "qscrollbar.h"-
39#include "qstyle.h"-
40#include "qstyleoption.h"-
41#include "qmenu.h"-
42#include <QtCore/qelapsedtimer.h>-
43-
44#ifndef QT_NO_SCROLLBAR-
45-
46#ifndef QT_NO_ACCESSIBILITY-
47#include "qaccessible.h"-
48#endif-
49#include <limits.h>-
50#include "qscrollbar_p.h"-
51-
52QT_BEGIN_NAMESPACE-
53-
54/*!-
55 \class QScrollBar-
56 \brief The QScrollBar widget provides a vertical or horizontal scroll bar.-
57-
58 \ingroup basicwidgets-
59 \inmodule QtWidgets-
60-
61 A scroll bar is a control that enables the user to access parts of a-
62 document that is larger than the widget used to display it. It provides-
63 a visual indication of the user's current position within the document-
64 and the amount of the document that is visible. Scroll bars are usually-
65 equipped with other controls that enable more accurate navigation.-
66 Qt displays scroll bars in a way that is appropriate for each platform.-
67-
68 If you need to provide a scrolling view onto another widget, it may be-
69 more convenient to use the QScrollArea class because this provides a-
70 viewport widget and scroll bars. QScrollBar is useful if you need to-
71 implement similar functionality for specialized widgets using QAbstractScrollArea;-
72 for example, if you decide to subclass QAbstractItemView.-
73 For most other situations where a slider control is used to obtain a value-
74 within a given range, the QSlider class may be more appropriate for your-
75 needs.-
76-
77 \table-
78 \row \li \image qscrollbar-picture.png-
79 \li Scroll bars typically include four separate controls: a slider,-
80 scroll arrows, and a page control.-
81-
82 \list-
83 \li a. The slider provides a way to quickly go to any part of the-
84 document, but does not support accurate navigation within large-
85 documents.-
86 \li b. The scroll arrows are push buttons which can be used to accurately-
87 navigate to a particular place in a document. For a vertical scroll bar-
88 connected to a text editor, these typically move the current position one-
89 "line" up or down, and adjust the position of the slider by a small-
90 amount. In editors and list boxes a "line" might mean one line of text;-
91 in an image viewer it might mean 20 pixels.-
92 \li c. The page control is the area over which the slider is dragged (the-
93 scroll bar's background). Clicking here moves the scroll bar towards-
94 the click by one "page". This value is usually the same as the length of-
95 the slider.-
96 \endlist-
97 \endtable-
98-
99 Each scroll bar has a value that indicates how far the slider is from-
100 the start of the scroll bar; this is obtained with value() and set-
101 with setValue(). This value always lies within the range of values-
102 defined for the scroll bar, from \l{QAbstractSlider::minimum()}{minimum()}-
103 to \l{QAbstractSlider::minimum()}{maximum()} inclusive. The range of-
104 acceptable values can be set with setMinimum() and setMaximum().-
105 At the minimum value, the top edge of the slider (for a vertical scroll-
106 bar) or left edge (for a horizontal scroll bar) will be at the top (or-
107 left) end of the scroll bar. At the maximum value, the bottom (or right)-
108 edge of the slider will be at the bottom (or right) end of the scroll bar.-
109-
110 The length of the slider is usually related to the value of the page step,-
111 and typically represents the proportion of the document area shown in a-
112 scrolling view. The page step is the amount that the value changes by-
113 when the user presses the \uicontrol{Page Up} and \uicontrol{Page Down} keys, and is-
114 set with setPageStep(). Smaller changes to the value defined by the-
115 line step are made using the cursor keys, and this quantity is set with-
116 \l{QAbstractSlider::}{setSingleStep()}.-
117-
118 Note that the range of values used is independent of the actual size-
119 of the scroll bar widget. You do not need to take this into account when-
120 you choose values for the range and the page step.-
121-
122 The range of values specified for the scroll bar are often determined-
123 differently to those for a QSlider because the length of the slider-
124 needs to be taken into account. If we have a document with 100 lines,-
125 and we can only show 20 lines in a widget, we may wish to construct a-
126 scroll bar with a page step of 20, a minimum value of 0, and a maximum-
127 value of 80. This would give us a scroll bar with five "pages".-
128-
129 \table-
130 \row \li \inlineimage qscrollbar-values.png-
131 \li The relationship between a document length, the range of values used-
132 in a scroll bar, and the page step is simple in many common situations.-
133 The scroll bar's range of values is determined by subtracting a-
134 chosen page step from some value representing the length of the document.-
135 In such cases, the following equation is useful:-
136 \e{document length} = maximum() - minimum() + pageStep().-
137 \endtable-
138-
139 QScrollBar only provides integer ranges. Note that although-
140 QScrollBar handles very large numbers, scroll bars on current-
141 screens cannot usefully represent ranges above about 100,000 pixels.-
142 Beyond that, it becomes difficult for the user to control the-
143 slider using either the keyboard or the mouse, and the scroll-
144 arrows will have limited use.-
145-
146 ScrollBar inherits a comprehensive set of signals from QAbstractSlider:-
147 \list-
148 \li \l{QAbstractSlider::valueChanged()}{valueChanged()} is emitted when the-
149 scroll bar's value has changed. The tracking() determines whether this-
150 signal is emitted during user interaction.-
151 \li \l{QAbstractSlider::rangeChanged()}{rangeChanged()} is emitted when the-
152 scroll bar's range of values has changed.-
153 \li \l{QAbstractSlider::sliderPressed()}{sliderPressed()} is emitted when-
154 the user starts to drag the slider.-
155 \li \l{QAbstractSlider::sliderMoved()}{sliderMoved()} is emitted when the user-
156 drags the slider.-
157 \li \l{QAbstractSlider::sliderReleased()}{sliderReleased()} is emitted when-
158 the user releases the slider.-
159 \li \l{QAbstractSlider::actionTriggered()}{actionTriggered()} is emitted-
160 when the scroll bar is changed by user interaction or via the-
161 \l{QAbstractSlider::triggerAction()}{triggerAction()} function.-
162 \endlist-
163-
164 A scroll bar can be controlled by the keyboard, but it has a-
165 default focusPolicy() of Qt::NoFocus. Use setFocusPolicy() to-
166 enable keyboard interaction with the scroll bar:-
167 \list-
168 \li Left/Right move a horizontal scroll bar by one single step.-
169 \li Up/Down move a vertical scroll bar by one single step.-
170 \li PageUp moves up one page.-
171 \li PageDown moves down one page.-
172 \li Home moves to the start (mininum).-
173 \li End moves to the end (maximum).-
174 \endlist-
175-
176 The slider itself can be controlled by using the-
177 \l{QAbstractSlider::triggerAction()}{triggerAction()} function to simulate-
178 user interaction with the scroll bar controls. This is useful if you have-
179 many different widgets that use a common range of values.-
180-
181 Most GUI styles use the pageStep() value to calculate the size of the-
182 slider.-
183-
184 \table 100%-
185 \row \li \inlineimage macintosh-horizontalscrollbar.png Screenshot of a Macintosh style scroll bar-
186 \li A scroll bar shown in the \l{Macintosh Style Widget Gallery}{Macintosh widget style}.-
187 \row \li \inlineimage windowsvista-horizontalscrollbar.png Screenshot of a Windows Vista style scroll bar-
188 \li A scroll bar shown in the \l{Windows Vista Style Widget Gallery}{Windows Vista widget style}.-
189 \row \li \inlineimage fusion-horizontalscrollbar.png Screenshot of a Fusion style scroll bar-
190 \li A scroll bar shown in the \l{Fusion Style Widget Gallery}{Fusion widget style}.-
191 \endtable-
192-
193 \sa QScrollArea, QSlider, QDial, QSpinBox, {fowler}{GUI Design Handbook: Scroll Bar}, {Sliders Example}-
194*/-
195-
196bool QScrollBarPrivate::updateHoverControl(const QPoint &pos)-
197{-
198 Q_Q(QScrollBar);-
199 QRect lastHoverRect = hoverRect;-
200 QStyle::SubControl lastHoverControl = hoverControl;-
201 bool doesHover = q->testAttribute(Qt::WA_Hover);-
202 if (lastHoverControl != newHoverControl(pos) && doesHover) {
lastHoverContr...erControl(pos)Description
TRUEnever evaluated
FALSEnever evaluated
doesHoverDescription
TRUEnever evaluated
FALSEnever evaluated
0
203 q->update(lastHoverRect);-
204 q->update(hoverRect);-
205 return true;
never executed: return true;
0
206 }-
207 return !doesHover;
never executed: return !doesHover;
0
208}-
209-
210QStyle::SubControl QScrollBarPrivate::newHoverControl(const QPoint &pos)-
211{-
212 Q_Q(QScrollBar);-
213 QStyleOptionSlider opt;-
214 q->initStyleOption(&opt);-
215 opt.subControls = QStyle::SC_All;-
216 hoverControl = q->style()->hitTestComplexControl(QStyle::CC_ScrollBar, &opt, pos, q);-
217 if (hoverControl == QStyle::SC_None)
hoverControl =...Style::SC_NoneDescription
TRUEnever evaluated
FALSEnever evaluated
0
218 hoverRect = QRect();
never executed: hoverRect = QRect();
0
219 else-
220 hoverRect = q->style()->subControlRect(QStyle::CC_ScrollBar, &opt, hoverControl, q);
never executed: hoverRect = q->style()->subControlRect(QStyle::CC_ScrollBar, &opt, hoverControl, q);
0
221 return hoverControl;
never executed: return hoverControl;
0
222}-
223-
224void QScrollBarPrivate::setTransient(bool value)-
225{-
226 Q_Q(QScrollBar);-
227 if (transient != value) {
transient != valueDescription
TRUEnever evaluated
FALSEnever evaluated
0
228 transient = value;-
229 if (q->isVisible()) {
q->isVisible()Description
TRUEnever evaluated
FALSEnever evaluated
0
230 if (q->style()->styleHint(QStyle::SH_ScrollBar_Transient, 0, q))
q->style()->st...ansient, 0, q)Description
TRUEnever evaluated
FALSEnever evaluated
0
231 q->update();
never executed: q->update();
0
232 } else if (!transient) {
never executed: end of block
!transientDescription
TRUEnever evaluated
FALSEnever evaluated
0
233 q->show();-
234 }
never executed: end of block
0
235 }
never executed: end of block
0
236}
never executed: end of block
0
237-
238void QScrollBarPrivate::flash()-
239{-
240 Q_Q(QScrollBar);-
241 if (!flashed && q->style()->styleHint(QStyle::SH_ScrollBar_Transient, 0, q)) {
!flashedDescription
TRUEnever evaluated
FALSEnever evaluated
q->style()->st...ansient, 0, q)Description
TRUEnever evaluated
FALSEnever evaluated
0
242 flashed = true;-
243 if (!q->isVisible())
!q->isVisible()Description
TRUEnever evaluated
FALSEnever evaluated
0
244 q->show();
never executed: q->show();
0
245 else-
246 q->update();
never executed: q->update();
0
247 }-
248 if (!flashTimer)
!flashTimerDescription
TRUEnever evaluated
FALSEnever evaluated
0
249 flashTimer = q->startTimer(0);
never executed: flashTimer = q->startTimer(0);
0
250}
never executed: end of block
0
251-
252void QScrollBarPrivate::activateControl(uint control, int threshold)-
253{-
254 QAbstractSlider::SliderAction action = QAbstractSlider::SliderNoAction;-
255 switch (control) {-
256 case QStyle::SC_ScrollBarAddPage:
never executed: case QStyle::SC_ScrollBarAddPage:
0
257 action = QAbstractSlider::SliderPageStepAdd;-
258 break;
never executed: break;
0
259 case QStyle::SC_ScrollBarSubPage:
never executed: case QStyle::SC_ScrollBarSubPage:
0
260 action = QAbstractSlider::SliderPageStepSub;-
261 break;
never executed: break;
0
262 case QStyle::SC_ScrollBarAddLine:
never executed: case QStyle::SC_ScrollBarAddLine:
0
263 action = QAbstractSlider::SliderSingleStepAdd;-
264 break;
never executed: break;
0
265 case QStyle::SC_ScrollBarSubLine:
never executed: case QStyle::SC_ScrollBarSubLine:
0
266 action = QAbstractSlider::SliderSingleStepSub;-
267 break;
never executed: break;
0
268 case QStyle::SC_ScrollBarFirst:
never executed: case QStyle::SC_ScrollBarFirst:
0
269 action = QAbstractSlider::SliderToMinimum;-
270 break;
never executed: break;
0
271 case QStyle::SC_ScrollBarLast:
never executed: case QStyle::SC_ScrollBarLast:
0
272 action = QAbstractSlider::SliderToMaximum;-
273 break;
never executed: break;
0
274 default:
never executed: default:
0
275 break;
never executed: break;
0
276 }-
277-
278 if (action) {
actionDescription
TRUEnever evaluated
FALSEnever evaluated
0
279 q_func()->setRepeatAction(action, threshold);-
280 q_func()->triggerAction(action);-
281 }
never executed: end of block
0
282}
never executed: end of block
0
283-
284void QScrollBarPrivate::stopRepeatAction()-
285{-
286 Q_Q(QScrollBar);-
287 QStyle::SubControl tmp = pressedControl;-
288 q->setRepeatAction(QAbstractSlider::SliderNoAction);-
289 pressedControl = QStyle::SC_None;-
290-
291 if (tmp == QStyle::SC_ScrollBarSlider)
tmp == QStyle:...crollBarSliderDescription
TRUEnever evaluated
FALSEnever evaluated
0
292 q->setSliderDown(false);
never executed: q->setSliderDown(false);
0
293-
294 QStyleOptionSlider opt;-
295 q->initStyleOption(&opt);-
296 q->repaint(q->style()->subControlRect(QStyle::CC_ScrollBar, &opt, tmp, q));-
297}
never executed: end of block
0
298-
299/*!-
300 Initialize \a option with the values from this QScrollBar. This method-
301 is useful for subclasses when they need a QStyleOptionSlider, but don't want-
302 to fill in all the information themselves.-
303-
304 \sa QStyleOption::initFrom()-
305*/-
306void QScrollBar::initStyleOption(QStyleOptionSlider *option) const-
307{-
308 if (!option)
!optionDescription
TRUEnever evaluated
FALSEnever evaluated
0
309 return;
never executed: return;
0
310-
311 Q_D(const QScrollBar);-
312 option->initFrom(this);-
313 option->subControls = QStyle::SC_None;-
314 option->activeSubControls = QStyle::SC_None;-
315 option->orientation = d->orientation;-
316 option->minimum = d->minimum;-
317 option->maximum = d->maximum;-
318 option->sliderPosition = d->position;-
319 option->sliderValue = d->value;-
320 option->singleStep = d->singleStep;-
321 option->pageStep = d->pageStep;-
322 option->upsideDown = d->invertedAppearance;-
323 if (d->orientation == Qt::Horizontal)
d->orientation...Qt::HorizontalDescription
TRUEnever evaluated
FALSEnever evaluated
0
324 option->state |= QStyle::State_Horizontal;
never executed: option->state |= QStyle::State_Horizontal;
0
325 if ((d->flashed || !d->transient) && style()->styleHint(QStyle::SH_ScrollBar_Transient, 0, this))
d->flashedDescription
TRUEnever evaluated
FALSEnever evaluated
!d->transientDescription
TRUEnever evaluated
FALSEnever evaluated
style()->style...ient, 0, this)Description
TRUEnever evaluated
FALSEnever evaluated
0
326 option->state |= QStyle::State_On;
never executed: option->state |= QStyle::State_On;
0
327}
never executed: end of block
0
328-
329-
330#define HORIZONTAL (d_func()->orientation == Qt::Horizontal)-
331#define VERTICAL !HORIZONTAL-
332-
333/*!-
334 Constructs a vertical scroll bar.-
335-
336 The \a parent argument is sent to the QWidget constructor.-
337-
338 The \l {QAbstractSlider::minimum} {minimum} defaults to 0, the-
339 \l {QAbstractSlider::maximum} {maximum} to 99, with a-
340 \l {QAbstractSlider::singleStep} {singleStep} size of 1 and a-
341 \l {QAbstractSlider::pageStep} {pageStep} size of 10, and an-
342 initial \l {QAbstractSlider::value} {value} of 0.-
343*/-
344QScrollBar::QScrollBar(QWidget *parent)-
345 : QAbstractSlider(*new QScrollBarPrivate, parent)-
346{-
347 d_func()->orientation = Qt::Vertical;-
348 d_func()->init();-
349}
never executed: end of block
0
350-
351/*!-
352 Constructs a scroll bar with the given \a orientation.-
353-
354 The \a parent argument is passed to the QWidget constructor.-
355-
356 The \l {QAbstractSlider::minimum} {minimum} defaults to 0, the-
357 \l {QAbstractSlider::maximum} {maximum} to 99, with a-
358 \l {QAbstractSlider::singleStep} {singleStep} size of 1 and a-
359 \l {QAbstractSlider::pageStep} {pageStep} size of 10, and an-
360 initial \l {QAbstractSlider::value} {value} of 0.-
361*/-
362QScrollBar::QScrollBar(Qt::Orientation orientation, QWidget *parent)-
363 : QAbstractSlider(*new QScrollBarPrivate, parent)-
364{-
365 d_func()->orientation = orientation;-
366 d_func()->init();-
367}
never executed: end of block
0
368-
369-
370-
371/*!-
372 Destroys the scroll bar.-
373*/-
374QScrollBar::~QScrollBar()-
375{-
376}-
377-
378void QScrollBarPrivate::init()-
379{-
380 Q_Q(QScrollBar);-
381 invertedControls = true;-
382 pressedControl = hoverControl = QStyle::SC_None;-
383 pointerOutsidePressedControl = false;-
384 transient = q->style()->styleHint(QStyle::SH_ScrollBar_Transient, 0, q);-
385 flashed = false;-
386 flashTimer = 0;-
387 q->setFocusPolicy(Qt::NoFocus);-
388 QSizePolicy sp(QSizePolicy::Minimum, QSizePolicy::Fixed, QSizePolicy::Slider);-
389 if (orientation == Qt::Vertical)
orientation == Qt::VerticalDescription
TRUEnever evaluated
FALSEnever evaluated
0
390 sp.transpose();
never executed: sp.transpose();
0
391 q->setSizePolicy(sp);-
392 q->setAttribute(Qt::WA_WState_OwnSizePolicy, false);-
393 q->setAttribute(Qt::WA_OpaquePaintEvent);-
394-
395#if !defined(QT_NO_CONTEXTMENU) && defined(Q_OS_WINCE)-
396 if (!q->style()->styleHint(QStyle::SH_ScrollBar_ContextMenu, 0, q)) {-
397 q->setContextMenuPolicy(Qt::PreventContextMenu);-
398 }-
399#endif-
400}
never executed: end of block
0
401-
402#ifndef QT_NO_CONTEXTMENU-
403/*! \reimp */-
404void QScrollBar::contextMenuEvent(QContextMenuEvent *event)-
405{-
406 if (!style()->styleHint(QStyle::SH_ScrollBar_ContextMenu, 0, this)) {
!style()->styl...Menu, 0, this)Description
TRUEnever evaluated
FALSEnever evaluated
0
407 QAbstractSlider::contextMenuEvent(event);-
408 return ;
never executed: return ;
0
409 }-
410-
411#ifndef QT_NO_MENU-
412 bool horiz = HORIZONTAL;-
413 QPointer<QMenu> menu = new QMenu(this);-
414 QAction *actScrollHere = menu->addAction(tr("Scroll here"));-
415 menu->addSeparator();-
416 QAction *actScrollTop = menu->addAction(horiz ? tr("Left edge") : tr("Top"));-
417 QAction *actScrollBottom = menu->addAction(horiz ? tr("Right edge") : tr("Bottom"));-
418 menu->addSeparator();-
419 QAction *actPageUp = menu->addAction(horiz ? tr("Page left") : tr("Page up"));-
420 QAction *actPageDn = menu->addAction(horiz ? tr("Page right") : tr("Page down"));-
421 menu->addSeparator();-
422 QAction *actScrollUp = menu->addAction(horiz ? tr("Scroll left") : tr("Scroll up"));-
423 QAction *actScrollDn = menu->addAction(horiz ? tr("Scroll right") : tr("Scroll down"));-
424 QAction *actionSelected = menu->exec(event->globalPos());-
425 delete menu;-
426 if (actionSelected == 0)
actionSelected == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
427 /* do nothing */ ;
never executed: ;
0
428 else if (actionSelected == actScrollHere)
actionSelected... actScrollHereDescription
TRUEnever evaluated
FALSEnever evaluated
0
429 setValue(d_func()->pixelPosToRangeValue(horiz ? event->pos().x() : event->pos().y()));
never executed: setValue(d_func()->pixelPosToRangeValue(horiz ? event->pos().x() : event->pos().y()));
0
430 else if (actionSelected == actScrollTop)
actionSelected == actScrollTopDescription
TRUEnever evaluated
FALSEnever evaluated
0
431 triggerAction(QAbstractSlider::SliderToMinimum);
never executed: triggerAction(QAbstractSlider::SliderToMinimum);
0
432 else if (actionSelected == actScrollBottom)
actionSelected...ctScrollBottomDescription
TRUEnever evaluated
FALSEnever evaluated
0
433 triggerAction(QAbstractSlider::SliderToMaximum);
never executed: triggerAction(QAbstractSlider::SliderToMaximum);
0
434 else if (actionSelected == actPageUp)
actionSelected == actPageUpDescription
TRUEnever evaluated
FALSEnever evaluated
0
435 triggerAction(QAbstractSlider::SliderPageStepSub);
never executed: triggerAction(QAbstractSlider::SliderPageStepSub);
0
436 else if (actionSelected == actPageDn)
actionSelected == actPageDnDescription
TRUEnever evaluated
FALSEnever evaluated
0
437 triggerAction(QAbstractSlider::SliderPageStepAdd);
never executed: triggerAction(QAbstractSlider::SliderPageStepAdd);
0
438 else if (actionSelected == actScrollUp)
actionSelected == actScrollUpDescription
TRUEnever evaluated
FALSEnever evaluated
0
439 triggerAction(QAbstractSlider::SliderSingleStepSub);
never executed: triggerAction(QAbstractSlider::SliderSingleStepSub);
0
440 else if (actionSelected == actScrollDn)
actionSelected == actScrollDnDescription
TRUEnever evaluated
FALSEnever evaluated
0
441 triggerAction(QAbstractSlider::SliderSingleStepAdd);
never executed: triggerAction(QAbstractSlider::SliderSingleStepAdd);
0
442#endif // QT_NO_MENU-
443}
never executed: end of block
0
444#endif // QT_NO_CONTEXTMENU-
445-
446-
447/*! \reimp */-
448QSize QScrollBar::sizeHint() const-
449{-
450 ensurePolished();-
451 QStyleOptionSlider opt;-
452 initStyleOption(&opt);-
453-
454 int scrollBarExtent = style()->pixelMetric(QStyle::PM_ScrollBarExtent, &opt, this);-
455 int scrollBarSliderMin = style()->pixelMetric(QStyle::PM_ScrollBarSliderMin, &opt, this);-
456 QSize size;-
457 if (opt.orientation == Qt::Horizontal)
opt.orientatio...Qt::HorizontalDescription
TRUEnever evaluated
FALSEnever evaluated
0
458 size = QSize(scrollBarExtent * 2 + scrollBarSliderMin, scrollBarExtent);
never executed: size = QSize(scrollBarExtent * 2 + scrollBarSliderMin, scrollBarExtent);
0
459 else-
460 size = QSize(scrollBarExtent, scrollBarExtent * 2 + scrollBarSliderMin);
never executed: size = QSize(scrollBarExtent, scrollBarExtent * 2 + scrollBarSliderMin);
0
461-
462 return style()->sizeFromContents(QStyle::CT_ScrollBar, &opt, size, this)
never executed: return style()->sizeFromContents(QStyle::CT_ScrollBar, &opt, size, this) .expandedTo(QApplication::globalStrut());
0
463 .expandedTo(QApplication::globalStrut());
never executed: return style()->sizeFromContents(QStyle::CT_ScrollBar, &opt, size, this) .expandedTo(QApplication::globalStrut());
0
464 }-
465-
466/*!\reimp */-
467void QScrollBar::sliderChange(SliderChange change)-
468{-
469 QAbstractSlider::sliderChange(change);-
470}
never executed: end of block
0
471-
472/*!-
473 \reimp-
474*/-
475bool QScrollBar::event(QEvent *event)-
476{-
477 Q_D(QScrollBar);-
478 switch(event->type()) {-
479 case QEvent::HoverEnter:
never executed: case QEvent::HoverEnter:
0
480 case QEvent::HoverLeave:
never executed: case QEvent::HoverLeave:
0
481 case QEvent::HoverMove:
never executed: case QEvent::HoverMove:
0
482 if (const QHoverEvent *he = static_cast<const QHoverEvent *>(event))
const QHoverEv...vent *>(event)Description
TRUEnever evaluated
FALSEnever evaluated
0
483 d_func()->updateHoverControl(he->pos());
never executed: d_func()->updateHoverControl(he->pos());
0
484 break;
never executed: break;
0
485 case QEvent::StyleChange:
never executed: case QEvent::StyleChange:
0
486 d_func()->setTransient(style()->styleHint(QStyle::SH_ScrollBar_Transient, 0, this));-
487 break;
never executed: break;
0
488 case QEvent::Timer:
never executed: case QEvent::Timer:
0
489 if (static_cast<QTimerEvent *>(event)->timerId() == d->flashTimer) {
static_cast<QT... d->flashTimerDescription
TRUEnever evaluated
FALSEnever evaluated
0
490 if (d->flashed && style()->styleHint(QStyle::SH_ScrollBar_Transient, 0, this)) {
d->flashedDescription
TRUEnever evaluated
FALSEnever evaluated
style()->style...ient, 0, this)Description
TRUEnever evaluated
FALSEnever evaluated
0
491 d->flashed = false;-
492 update();-
493 }
never executed: end of block
0
494 killTimer(d->flashTimer);-
495 d->flashTimer = 0;-
496 }
never executed: end of block
0
497 break;
never executed: break;
0
498 default:
never executed: default:
0
499 break;
never executed: break;
0
500 }-
501 return QAbstractSlider::event(event);
never executed: return QAbstractSlider::event(event);
0
502}-
503-
504/*!-
505 \reimp-
506*/-
507#ifndef QT_NO_WHEELEVENT-
508void QScrollBar::wheelEvent(QWheelEvent *event)-
509{-
510 event->ignore();-
511 int delta = event->delta();-
512 // scrollbar is a special case - in vertical mode it reaches minimum-
513 // value in the upper position, however QSlider's minimum value is on-
514 // the bottom. So we need to invert a value, but since the scrollbar is-
515 // inverted by default, we need to inverse the delta value for the-
516 // horizontal orientation.-
517 if (event->orientation() == Qt::Horizontal)
event->orienta...Qt::HorizontalDescription
TRUEnever evaluated
FALSEnever evaluated
0
518 delta = -delta;
never executed: delta = -delta;
0
519 Q_D(QScrollBar);-
520 if (d->scrollByDelta(event->orientation(), event->modifiers(), delta))
d->scrollByDel...iers(), delta)Description
TRUEnever evaluated
FALSEnever evaluated
0
521 event->accept();
never executed: event->accept();
0
522-
523 if (event->phase() == Qt::ScrollBegin)
event->phase()...t::ScrollBeginDescription
TRUEnever evaluated
FALSEnever evaluated
0
524 d->setTransient(false);
never executed: d->setTransient(false);
0
525 else if (event->phase() == Qt::ScrollEnd)
event->phase()... Qt::ScrollEndDescription
TRUEnever evaluated
FALSEnever evaluated
0
526 d->setTransient(true);
never executed: d->setTransient(true);
0
527}
never executed: end of block
0
528#endif-
529-
530/*!-
531 \reimp-
532*/-
533void QScrollBar::paintEvent(QPaintEvent *)-
534{-
535 Q_D(QScrollBar);-
536 QPainter p(this);-
537 QStyleOptionSlider opt;-
538 initStyleOption(&opt);-
539 opt.subControls = QStyle::SC_All;-
540 if (d->pressedControl) {
d->pressedControlDescription
TRUEnever evaluated
FALSEnever evaluated
0
541 opt.activeSubControls = (QStyle::SubControl)d->pressedControl;-
542 if (!d->pointerOutsidePressedControl)
!d->pointerOut...PressedControlDescription
TRUEnever evaluated
FALSEnever evaluated
0
543 opt.state |= QStyle::State_Sunken;
never executed: opt.state |= QStyle::State_Sunken;
0
544 } else {
never executed: end of block
0
545 opt.activeSubControls = (QStyle::SubControl)d->hoverControl;-
546 }
never executed: end of block
0
547 style()->drawComplexControl(QStyle::CC_ScrollBar, &opt, &p, this);-
548}
never executed: end of block
0
549-
550/*!-
551 \reimp-
552*/-
553void QScrollBar::mousePressEvent(QMouseEvent *e)-
554{-
555 Q_D(QScrollBar);-
556-
557 if (d->repeatActionTimer.isActive())
d->repeatActio...mer.isActive()Description
TRUEnever evaluated
FALSEnever evaluated
0
558 d->stopRepeatAction();
never executed: d->stopRepeatAction();
0
559-
560 bool midButtonAbsPos = style()->styleHint(QStyle::SH_ScrollBar_MiddleClickAbsolutePosition,-
561 0, this);-
562 QStyleOptionSlider opt;-
563 initStyleOption(&opt);-
564-
565 if (d->maximum == d->minimum // no range
d->maximum == d->minimumDescription
TRUEnever evaluated
FALSEnever evaluated
0
566 || (e->buttons() & (~e->button())) // another button was clicked before
(e->buttons() ...~e->button()))Description
TRUEnever evaluated
FALSEnever evaluated
0
567 || !(e->button() == Qt::LeftButton || (midButtonAbsPos && e->button() == Qt::MidButton)))
e->button() == Qt::LeftButtonDescription
TRUEnever evaluated
FALSEnever evaluated
midButtonAbsPosDescription
TRUEnever evaluated
FALSEnever evaluated
e->button() == Qt::MidButtonDescription
TRUEnever evaluated
FALSEnever evaluated
0
568 return;
never executed: return;
0
569-
570 d->pressedControl = style()->hitTestComplexControl(QStyle::CC_ScrollBar, &opt, e->pos(), this);-
571 d->pointerOutsidePressedControl = false;-
572-
573 QRect sr = style()->subControlRect(QStyle::CC_ScrollBar, &opt,-
574 QStyle::SC_ScrollBarSlider, this);-
575 QPoint click = e->pos();-
576 QPoint pressValue = click - sr.center() + sr.topLeft();-
577 d->pressValue = d->orientation == Qt::Horizontal ? d->pixelPosToRangeValue(pressValue.x()) :
d->orientation...Qt::HorizontalDescription
TRUEnever evaluated
FALSEnever evaluated
0
578 d->pixelPosToRangeValue(pressValue.y());-
579 if (d->pressedControl == QStyle::SC_ScrollBarSlider) {
d->pressedCont...crollBarSliderDescription
TRUEnever evaluated
FALSEnever evaluated
0
580 d->clickOffset = HORIZONTAL ? (click.x()-sr.x()) : (click.y()-sr.y());
(d_func()->ori...t::Horizontal)Description
TRUEnever evaluated
FALSEnever evaluated
0
581 d->snapBackPosition = d->position;-
582 }
never executed: end of block
0
583-
584 if ((d->pressedControl == QStyle::SC_ScrollBarAddPage
d->pressedCont...rollBarAddPageDescription
TRUEnever evaluated
FALSEnever evaluated
0
585 || d->pressedControl == QStyle::SC_ScrollBarSubPage)
d->pressedCont...rollBarSubPageDescription
TRUEnever evaluated
FALSEnever evaluated
0
586 && ((midButtonAbsPos && e->button() == Qt::MidButton)
midButtonAbsPosDescription
TRUEnever evaluated
FALSEnever evaluated
e->button() == Qt::MidButtonDescription
TRUEnever evaluated
FALSEnever evaluated
0
587 || (style()->styleHint(QStyle::SH_ScrollBar_LeftClickAbsolutePosition, &opt, this)
style()->style...n, &opt, this)Description
TRUEnever evaluated
FALSEnever evaluated
0
588 && e->button() == Qt::LeftButton))) {
e->button() == Qt::LeftButtonDescription
TRUEnever evaluated
FALSEnever evaluated
0
589 int sliderLength = HORIZONTAL ? sr.width() : sr.height();
(d_func()->ori...t::Horizontal)Description
TRUEnever evaluated
FALSEnever evaluated
0
590 setSliderPosition(d->pixelPosToRangeValue((HORIZONTAL ? e->pos().x()-
591 : e->pos().y()) - sliderLength / 2));-
592 d->pressedControl = QStyle::SC_ScrollBarSlider;-
593 d->clickOffset = sliderLength / 2;-
594 }
never executed: end of block
0
595 const int initialDelay = 500; // default threshold-
596 QElapsedTimer time;-
597 time.start();-
598 d->activateControl(d->pressedControl, initialDelay);-
599 repaint(style()->subControlRect(QStyle::CC_ScrollBar, &opt, d->pressedControl, this));-
600 if (time.elapsed() >= initialDelay && d->repeatActionTimer.isActive()) {
time.elapsed() >= initialDelayDescription
TRUEnever evaluated
FALSEnever evaluated
d->repeatActio...mer.isActive()Description
TRUEnever evaluated
FALSEnever evaluated
0
601 // It took more than 500ms (the initial timer delay) to process-
602 // the control activation and repaint(), we therefore need-
603 // to restart the timer in case we have a pending mouse release event;-
604 // otherwise we'll get a timer event right before the release event,-
605 // causing the repeat action to be invoked twice on a single mouse click.-
606 // 50ms is the default repeat time (see activateControl/setRepeatAction).-
607 d->repeatActionTimer.start(50, this);-
608 }
never executed: end of block
0
609 if (d->pressedControl == QStyle::SC_ScrollBarSlider)
d->pressedCont...crollBarSliderDescription
TRUEnever evaluated
FALSEnever evaluated
0
610 setSliderDown(true);
never executed: setSliderDown(true);
0
611}
never executed: end of block
0
612-
613-
614/*!-
615 \reimp-
616*/-
617void QScrollBar::mouseReleaseEvent(QMouseEvent *e)-
618{-
619 Q_D(QScrollBar);-
620 if (!d->pressedControl)
!d->pressedControlDescription
TRUEnever evaluated
FALSEnever evaluated
0
621 return;
never executed: return;
0
622-
623 if (e->buttons() & (~e->button())) // some other button is still pressed
e->buttons() & (~e->button())Description
TRUEnever evaluated
FALSEnever evaluated
0
624 return;
never executed: return;
0
625-
626 d->stopRepeatAction();-
627}
never executed: end of block
0
628-
629-
630/*!-
631 \reimp-
632*/-
633void QScrollBar::mouseMoveEvent(QMouseEvent *e)-
634{-
635 Q_D(QScrollBar);-
636 if (!d->pressedControl)
!d->pressedControlDescription
TRUEnever evaluated
FALSEnever evaluated
0
637 return;
never executed: return;
0
638-
639 QStyleOptionSlider opt;-
640 initStyleOption(&opt);-
641 if (!(e->buttons() & Qt::LeftButton
e->buttons() & Qt::LeftButtonDescription
TRUEnever evaluated
FALSEnever evaluated
0
642 || ((e->buttons() & Qt::MidButton)
(e->buttons() & Qt::MidButton)Description
TRUEnever evaluated
FALSEnever evaluated
0
643 && style()->styleHint(QStyle::SH_ScrollBar_MiddleClickAbsolutePosition, &opt, this))))
style()->style...n, &opt, this)Description
TRUEnever evaluated
FALSEnever evaluated
0
644 return;
never executed: return;
0
645-
646 if (d->pressedControl == QStyle::SC_ScrollBarSlider) {
d->pressedCont...crollBarSliderDescription
TRUEnever evaluated
FALSEnever evaluated
0
647 QPoint click = e->pos();-
648 int newPosition = d->pixelPosToRangeValue((HORIZONTAL ? click.x() : click.y()) -d->clickOffset);-
649 int m = style()->pixelMetric(QStyle::PM_MaximumDragDistance, &opt, this);-
650 if (m >= 0) {
m >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
651 QRect r = rect();-
652 r.adjust(-m, -m, m, m);-
653 if (! r.contains(e->pos()))
! r.contains(e->pos())Description
TRUEnever evaluated
FALSEnever evaluated
0
654 newPosition = d->snapBackPosition;
never executed: newPosition = d->snapBackPosition;
0
655 }
never executed: end of block
0
656 setSliderPosition(newPosition);-
657 } else if (!style()->styleHint(QStyle::SH_ScrollBar_ScrollWhenPointerLeavesControl, &opt, this)) {
never executed: end of block
!style()->styl...l, &opt, this)Description
TRUEnever evaluated
FALSEnever evaluated
0
658-
659 if (style()->styleHint(QStyle::SH_ScrollBar_RollBetweenButtons, &opt, this)
style()->style...s, &opt, this)Description
TRUEnever evaluated
FALSEnever evaluated
0
660 && d->pressedControl & (QStyle::SC_ScrollBarAddLine | QStyle::SC_ScrollBarSubLine)) {
d->pressedCont...ollBarSubLine)Description
TRUEnever evaluated
FALSEnever evaluated
0
661 QStyle::SubControl newSc = style()->hitTestComplexControl(QStyle::CC_ScrollBar, &opt, e->pos(), this);-
662 if (newSc == d->pressedControl && !d->pointerOutsidePressedControl)
newSc == d->pressedControlDescription
TRUEnever evaluated
FALSEnever evaluated
!d->pointerOut...PressedControlDescription
TRUEnever evaluated
FALSEnever evaluated
0
663 return; // nothing to do
never executed: return;
0
664 if (newSc & (QStyle::SC_ScrollBarAddLine | QStyle::SC_ScrollBarSubLine)) {
newSc & (QStyl...ollBarSubLine)Description
TRUEnever evaluated
FALSEnever evaluated
0
665 d->pointerOutsidePressedControl = false;-
666 QRect scRect = style()->subControlRect(QStyle::CC_ScrollBar, &opt, newSc, this);-
667 scRect |= style()->subControlRect(QStyle::CC_ScrollBar, &opt, d->pressedControl, this);-
668 d->pressedControl = newSc;-
669 d->activateControl(d->pressedControl, 0);-
670 update(scRect);-
671 return;
never executed: return;
0
672 }-
673 }
never executed: end of block
0
674-
675 // stop scrolling when the mouse pointer leaves a control-
676 // similar to push buttons-
677 QRect pr = style()->subControlRect(QStyle::CC_ScrollBar, &opt, d->pressedControl, this);-
678 if (pr.contains(e->pos()) == d->pointerOutsidePressedControl) {
pr.contains(e-...PressedControlDescription
TRUEnever evaluated
FALSEnever evaluated
0
679 if ((d->pointerOutsidePressedControl = !d->pointerOutsidePressedControl)) {
(d->pointerOut...ressedControl)Description
TRUEnever evaluated
FALSEnever evaluated
0
680 d->pointerOutsidePressedControl = true;-
681 setRepeatAction(SliderNoAction);-
682 repaint(pr);-
683 } else {
never executed: end of block
0
684 d->activateControl(d->pressedControl);-
685 }
never executed: end of block
0
686 }-
687 }
never executed: end of block
0
688}
never executed: end of block
0
689-
690-
691int QScrollBarPrivate::pixelPosToRangeValue(int pos) const-
692{-
693 Q_Q(const QScrollBar);-
694 QStyleOptionSlider opt;-
695 q->initStyleOption(&opt);-
696 QRect gr = q->style()->subControlRect(QStyle::CC_ScrollBar, &opt,-
697 QStyle::SC_ScrollBarGroove, q);-
698 QRect sr = q->style()->subControlRect(QStyle::CC_ScrollBar, &opt,-
699 QStyle::SC_ScrollBarSlider, q);-
700 int sliderMin, sliderMax, sliderLength;-
701-
702 if (orientation == Qt::Horizontal) {
orientation == Qt::HorizontalDescription
TRUEnever evaluated
FALSEnever evaluated
0
703 sliderLength = sr.width();-
704 sliderMin = gr.x();-
705 sliderMax = gr.right() - sliderLength + 1;-
706 if (q->layoutDirection() == Qt::RightToLeft)
q->layoutDirec...t::RightToLeftDescription
TRUEnever evaluated
FALSEnever evaluated
0
707 opt.upsideDown = !opt.upsideDown;
never executed: opt.upsideDown = !opt.upsideDown;
0
708 } else {
never executed: end of block
0
709 sliderLength = sr.height();-
710 sliderMin = gr.y();-
711 sliderMax = gr.bottom() - sliderLength + 1;-
712 }
never executed: end of block
0
713-
714 return QStyle::sliderValueFromPosition(minimum, maximum, pos - sliderMin,
never executed: return QStyle::sliderValueFromPosition(minimum, maximum, pos - sliderMin, sliderMax - sliderMin, opt.upsideDown);
0
715 sliderMax - sliderMin, opt.upsideDown);
never executed: return QStyle::sliderValueFromPosition(minimum, maximum, pos - sliderMin, sliderMax - sliderMin, opt.upsideDown);
0
716}-
717-
718/*! \reimp-
719*/-
720void QScrollBar::hideEvent(QHideEvent *)-
721{-
722 Q_D(QScrollBar);-
723 if (d->pressedControl) {
d->pressedControlDescription
TRUEnever evaluated
FALSEnever evaluated
0
724 d->pressedControl = QStyle::SC_None;-
725 setRepeatAction(SliderNoAction);-
726 }
never executed: end of block
0
727}
never executed: end of block
0
728-
729/*! \internal-
730 Returns the style option for scroll bar.-
731*/-
732Q_WIDGETS_EXPORT QStyleOptionSlider qt_qscrollbarStyleOption(QScrollBar *scrollbar)-
733{-
734 QStyleOptionSlider opt;-
735 scrollbar->initStyleOption(&opt);-
736 return opt;
never executed: return opt;
0
737}-
738-
739QT_END_NAMESPACE-
740-
741#include "moc_qscrollbar.cpp"-
742-
743#endif // QT_NO_SCROLLBAR-
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