source: branches/4.5.1/src/gui/graphicsview/qgraphicswidget_p.cpp

Last change on this file was 2, checked in by Dmitry A. Kuminov, 17 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 25.7 KB
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1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information (qt-info@nokia.com)
5**
6** This file is part of the QtGui module of the Qt Toolkit.
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8** $QT_BEGIN_LICENSE:LGPL$
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20** ensure the GNU Lesser General Public License version 2.1 requirements
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40****************************************************************************/
41
42#include "qglobal.h"
43
44#ifndef QT_NO_GRAPHICSVIEW
45
46#include <QtCore/qdebug.h>
47#include "qgraphicswidget_p.h"
48#include "qgraphicslayout.h"
49#include "qgraphicsscene_p.h"
50#include <QtGui/qapplication.h>
51#include <QtGui/qgraphicsscene.h>
52#include <QtGui/qstyleoption.h>
53#include <QtGui/QStyleOptionTitleBar>
54#include <QtGui/QGraphicsSceneMouseEvent>
55#if defined(Q_WS_MAC) && !defined(QT_NO_STYLE_MAC)
56# include <QMacStyle>
57#endif
58
59QT_BEGIN_NAMESPACE
60
61void QGraphicsWidgetPrivate::init(QGraphicsItem *parentItem, Qt::WindowFlags wFlags)
62{
63 Q_Q(QGraphicsWidget);
64
65 attributes = 0;
66 isWidget = 1; // QGraphicsItem::isWidget() returns true.
67 focusNext = focusPrev = q;
68 focusPolicy = Qt::NoFocus;
69 q->setParentItem(parentItem);
70 q->setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred, QSizePolicy::DefaultType));
71 q->setGraphicsItem(q);
72
73 resolveLayoutDirection();
74
75 if (!parentItem)
76 adjustWindowFlags(&wFlags);
77 windowFlags = wFlags;
78 q->unsetWindowFrameMargins();
79}
80qreal QGraphicsWidgetPrivate::titleBarHeight(const QStyleOptionTitleBar &options) const
81{
82 Q_Q(const QGraphicsWidget);
83 int height = q->style()->pixelMetric(QStyle::PM_TitleBarHeight, &options);
84#if defined(Q_WS_MAC) && !defined(QT_NO_STYLE_MAC)
85 if (qobject_cast<QMacStyle*>(q->style())) {
86 height -=4;
87 }
88#endif
89 return (qreal)height;
90}
91
92void QGraphicsWidgetPrivate::getLayoutItemMargins(qreal *left, qreal *top, qreal *right, qreal *bottom) const
93{
94 if (left)
95 *left = leftLayoutItemMargin;
96 if (top)
97 *top = topLayoutItemMargin;
98 if (right)
99 *right = rightLayoutItemMargin;
100 if (bottom)
101 *bottom = bottomLayoutItemMargin;
102}
103
104void QGraphicsWidgetPrivate::setLayoutItemMargins(qreal left, qreal top, qreal right, qreal bottom)
105{
106 if (leftLayoutItemMargin == left
107 && topLayoutItemMargin == top
108 && rightLayoutItemMargin == right
109 && bottomLayoutItemMargin == bottom)
110 return;
111
112 Q_Q(QGraphicsWidget);
113 leftLayoutItemMargin = left;
114 topLayoutItemMargin = top;
115 rightLayoutItemMargin = right;
116 bottomLayoutItemMargin = bottom;
117 q->updateGeometry();
118}
119
120void QGraphicsWidgetPrivate::setLayoutItemMargins(QStyle::SubElement element, const QStyleOption *opt)
121{
122 Q_Q(QGraphicsWidget);
123 QStyleOption myOpt;
124 if (!opt) {
125 q->initStyleOption(&myOpt);
126 myOpt.rect.setRect(0, 0, 32768, 32768); // arbitrary
127 opt = &myOpt;
128 }
129
130 QRect liRect = q->style()->subElementRect(element, opt, /* q */ 0);
131 if (liRect.isValid()) {
132 leftLayoutItemMargin = (opt->rect.left() - liRect.left());
133 topLayoutItemMargin = (opt->rect.top() - liRect.top());
134 rightLayoutItemMargin = (liRect.right() - opt->rect.right());
135 bottomLayoutItemMargin = (liRect.bottom() - opt->rect.bottom());
136 } else {
137 leftLayoutItemMargin = 0;
138 topLayoutItemMargin = 0;
139 rightLayoutItemMargin = 0;
140 bottomLayoutItemMargin = 0;
141 }
142}
143
144void QGraphicsWidgetPrivate::setPalette_helper(const QPalette &palette)
145{
146 if (this->palette == palette && this->palette.resolve() == palette.resolve())
147 return;
148 updatePalette(palette);
149}
150
151void QGraphicsWidgetPrivate::resolvePalette(uint inheritedMask)
152{
153 inheritedPaletteResolveMask = inheritedMask;
154 QPalette naturalPalette = naturalWidgetPalette();
155 QPalette resolvedPalette = palette.resolve(naturalPalette);
156 updatePalette(resolvedPalette);
157}
158
159void QGraphicsWidgetPrivate::updatePalette(const QPalette &palette)
160{
161 Q_Q(QGraphicsWidget);
162 // Update local palette setting.
163 this->palette = palette;
164
165 // Calculate new mask.
166 if (q->isWindow() && !q->testAttribute(Qt::WA_WindowPropagation))
167 inheritedPaletteResolveMask = 0;
168 int mask = palette.resolve() | inheritedPaletteResolveMask;
169
170 // Propagate to children.
171 for (int i = 0; i < children.size(); ++i) {
172 QGraphicsItem *item = children.at(i);
173 if (item->isWidget()) {
174 QGraphicsWidget *w = static_cast<QGraphicsWidget *>(item);
175 if (!w->isWindow() || w->testAttribute(Qt::WA_WindowPropagation))
176 w->d_func()->resolvePalette(mask);
177 } else {
178 item->d_ptr->resolvePalette(mask);
179 }
180 }
181
182 // Notify change.
183 QEvent event(QEvent::PaletteChange);
184 QApplication::sendEvent(q, &event);
185}
186
187void QGraphicsWidgetPrivate::setLayoutDirection_helper(Qt::LayoutDirection direction)
188{
189 Q_Q(QGraphicsWidget);
190 if ((direction == Qt::RightToLeft) == (testAttribute(Qt::WA_RightToLeft)))
191 return;
192 q->setAttribute(Qt::WA_RightToLeft, (direction == Qt::RightToLeft));
193
194 // Propagate this change to all children.
195 for (int i = 0; i < children.size(); ++i) {
196 QGraphicsItem *item = children.at(i);
197 if (item->isWidget()) {
198 QGraphicsWidget *widget = static_cast<QGraphicsWidget *>(item);
199 if (widget->parentWidget() && !widget->testAttribute(Qt::WA_SetLayoutDirection))
200 widget->d_func()->setLayoutDirection_helper(direction);
201 }
202 }
203
204 // Send the notification event to this widget item.
205 QEvent e(QEvent::LayoutDirectionChange);
206 QApplication::sendEvent(q, &e);
207}
208
209void QGraphicsWidgetPrivate::resolveLayoutDirection()
210{
211 Q_Q(QGraphicsWidget);
212 if (q->testAttribute(Qt::WA_SetLayoutDirection)) {
213 return;
214 }
215 if (QGraphicsWidget *parentWidget = q->parentWidget()) {
216 setLayoutDirection_helper(parentWidget->layoutDirection());
217 } else if (scene) {
218 // ### shouldn't the scene have a layoutdirection really? how does
219 // ### QGraphicsWidget get changes from QApplication::layoutDirection?
220 setLayoutDirection_helper(QApplication::layoutDirection());
221 } else {
222 setLayoutDirection_helper(QApplication::layoutDirection());
223 }
224}
225
226QPalette QGraphicsWidgetPrivate::naturalWidgetPalette() const
227{
228 Q_Q(const QGraphicsWidget);
229 QPalette palette;
230 if (QGraphicsWidget *parent = q->parentWidget()) {
231 palette = parent->palette();
232 } else if (scene) {
233 palette = scene->palette();
234 }
235 palette.resolve(0);
236 return palette;
237}
238
239void QGraphicsWidgetPrivate::setFont_helper(const QFont &font)
240{
241 if (this->font == font && this->font.resolve() == font.resolve())
242 return;
243 updateFont(font);
244}
245
246void QGraphicsWidgetPrivate::resolveFont(uint inheritedMask)
247{
248 inheritedFontResolveMask = inheritedMask;
249 QFont naturalFont = naturalWidgetFont();
250 QFont resolvedFont = font.resolve(naturalFont);
251 updateFont(resolvedFont);
252}
253
254void QGraphicsWidgetPrivate::updateFont(const QFont &font)
255{
256 Q_Q(QGraphicsWidget);
257 // Update the local font setting.
258 this->font = font;
259
260 // Calculate new mask.
261 if (q->isWindow() && !q->testAttribute(Qt::WA_WindowPropagation))
262 inheritedFontResolveMask = 0;
263 int mask = font.resolve() | inheritedFontResolveMask;
264
265 // Propagate to children.
266 for (int i = 0; i < children.size(); ++i) {
267 QGraphicsItem *item = children.at(i);
268 if (item->isWidget()) {
269 QGraphicsWidget *w = static_cast<QGraphicsWidget *>(item);
270 if (!w->isWindow() || w->testAttribute(Qt::WA_WindowPropagation))
271 w->d_func()->resolveFont(mask);
272 } else {
273 item->d_ptr->resolveFont(mask);
274 }
275 }
276
277 if (!polished)
278 return;
279 // Notify change.
280 QEvent event(QEvent::FontChange);
281 QApplication::sendEvent(q, &event);
282}
283
284QFont QGraphicsWidgetPrivate::naturalWidgetFont() const
285{
286 Q_Q(const QGraphicsWidget);
287 QFont naturalFont; // ### no application font support
288 if (QGraphicsWidget *parent = q->parentWidget()) {
289 naturalFont = parent->font();
290 } else if (scene) {
291 naturalFont = scene->font();
292 }
293 naturalFont.resolve(0);
294 return naturalFont;
295}
296
297void QGraphicsWidgetPrivate::initStyleOptionTitleBar(QStyleOptionTitleBar *option)
298{
299 Q_Q(QGraphicsWidget);
300 q->initStyleOption(option);
301 option->rect.setHeight(titleBarHeight(*option));
302 option->titleBarFlags = windowFlags;
303 option->subControls = QStyle::SC_TitleBarCloseButton | QStyle::SC_TitleBarLabel | QStyle::SC_TitleBarSysMenu;
304 option->activeSubControls = hoveredSubControl;
305 bool isActive = q->isActiveWindow();
306 if (isActive) {
307 option->state |= QStyle::State_Active;
308 option->titleBarState = Qt::WindowActive;
309 option->titleBarState |= QStyle::State_Active;
310 } else {
311 option->state &= ~QStyle::State_Active;
312 option->titleBarState = Qt::WindowNoState;
313 }
314 QFont windowTitleFont = QApplication::font("QWorkspaceTitleBar");
315 QRect textRect = q->style()->subControlRect(QStyle::CC_TitleBar, option, QStyle::SC_TitleBarLabel, 0);
316 option->text = QFontMetrics(windowTitleFont).elidedText(windowTitle, Qt::ElideRight, textRect.width());
317}
318
319void QGraphicsWidgetPrivate::adjustWindowFlags(Qt::WindowFlags *flags)
320{
321 bool customize = (*flags & (Qt::CustomizeWindowHint
322 | Qt::FramelessWindowHint
323 | Qt::WindowTitleHint
324 | Qt::WindowSystemMenuHint
325 | Qt::WindowMinimizeButtonHint
326 | Qt::WindowMaximizeButtonHint
327 | Qt::WindowContextHelpButtonHint));
328
329 uint type = (*flags & Qt::WindowType_Mask);
330 if (customize)
331 ;
332 else if (type == Qt::Dialog || type == Qt::Sheet)
333 *flags |= Qt::WindowTitleHint | Qt::WindowSystemMenuHint | Qt::WindowContextHelpButtonHint;
334 else if (type == Qt::Tool)
335 *flags |= Qt::WindowTitleHint | Qt::WindowSystemMenuHint;
336 else if (type == Qt::Window || type == Qt::SubWindow)
337 *flags |= Qt::WindowTitleHint | Qt::WindowSystemMenuHint
338 | Qt::WindowMinimizeButtonHint | Qt::WindowMaximizeButtonHint;
339}
340
341void QGraphicsWidgetPrivate::windowFrameMouseReleaseEvent(QGraphicsSceneMouseEvent *event)
342{
343 Q_Q(QGraphicsWidget);
344 if (grabbedSection != Qt::NoSection) {
345 if (grabbedSection == Qt::TitleBarArea) {
346 buttonSunken = false;
347 QStyleOptionTitleBar bar;
348 initStyleOptionTitleBar(&bar);
349 // make sure that the coordinates (rect and pos) we send to the style are positive.
350 bar.rect = q->windowFrameRect().toRect();
351 bar.rect.moveTo(0,0);
352 bar.rect.setHeight(q->style()->pixelMetric(QStyle::PM_TitleBarHeight, &bar));
353 QPointF pos = event->pos();
354 pos.rx() += leftWindowFrameMargin;
355 pos.ry() += topWindowFrameMargin;
356 bar.subControls = QStyle::SC_TitleBarCloseButton;
357 if (q->style()->subControlRect(QStyle::CC_TitleBar, &bar,
358 QStyle::SC_TitleBarCloseButton,
359 event->widget()).contains(pos.toPoint())) {
360 q->close();
361 }
362 }
363 if (!(static_cast<QGraphicsSceneMouseEvent *>(event)->buttons()))
364 grabbedSection = Qt::NoSection;
365 event->accept();
366 }
367}
368
369void QGraphicsWidgetPrivate::windowFrameMousePressEvent(QGraphicsSceneMouseEvent *event)
370{
371 Q_Q(QGraphicsWidget);
372 if (event->button() != Qt::LeftButton)
373 return;
374
375 startGeometry = q->geometry();
376 grabbedSection = q->windowFrameSectionAt(event->pos());
377 switch (grabbedSection) {
378 case Qt::LeftSection:
379 case Qt::TopLeftSection:
380 mouseDelta = event->pos() - q->rect().topLeft();
381 break;
382 case Qt::TopSection:
383 case Qt::TopRightSection:
384 mouseDelta = event->pos() - q->rect().topRight();
385 break;
386 case Qt::RightSection:
387 case Qt::BottomRightSection:
388 mouseDelta = event->pos() - q->rect().bottomRight();
389 break;
390 case Qt::BottomSection:
391 case Qt::BottomLeftSection:
392 mouseDelta = event->pos() - q->rect().bottomLeft();
393 break;
394 case Qt::TitleBarArea:
395 if (hoveredSubControl == QStyle::SC_TitleBarCloseButton) {
396 buttonSunken = true;
397 q->update();
398 }
399 break;
400 case Qt::NoSection:
401 break;
402 }
403 event->setAccepted(grabbedSection != Qt::NoSection);
404}
405
406static void _q_boundGeometryToSizeConstraints(const QRectF &startGeometry,
407 QRectF *rect, Qt::WindowFrameSection section,
408 const QSizeF &min, const QSizeF &max)
409{
410 int height;
411 int width;
412 switch (section) {
413 case Qt::LeftSection:
414 width = qRound(qBound(min.width(), rect->width(), max.width()));
415 rect->setRect(startGeometry.right() - width, startGeometry.top(),
416 width, startGeometry.height());
417 break;
418 case Qt::TopLeftSection:
419 width = qRound(qBound(min.width(), rect->width(), max.width()));
420 height = qRound(qBound(min.height(), rect->height(), max.height()));
421 rect->setRect(startGeometry.right() - width, startGeometry.bottom() - height,
422 width, height);
423 break;
424 case Qt::TopSection:
425 height = qRound(qBound(min.height(), rect->height(), max.height()));
426 rect->setRect(startGeometry.left(), startGeometry.bottom() - height,
427 startGeometry.width(), height);
428 break;
429 case Qt::TopRightSection:
430 height = qRound(qBound(min.height(), rect->height(), max.height()));
431 rect->setTop(rect->bottom() - height);
432 rect->setWidth(qBound(min.width(), rect->width(), max.width()));
433 break;
434 case Qt::RightSection:
435 rect->setWidth(qBound(min.width(), rect->width(), max.width()));
436 break;
437 case Qt::BottomRightSection:
438 rect->setWidth(qBound(min.width(), rect->width(), max.width()));
439 rect->setHeight(qBound(min.height(), rect->height(), max.height()));
440 break;
441 case Qt::BottomSection:
442 rect->setHeight(qBound(min.height(), rect->height(), max.height()));
443 break;
444 case Qt::BottomLeftSection:
445 height = qRound(qBound(min.height(), rect->height(), max.height()));
446 width = qRound(qBound(min.width(), rect->width(), max.width()));
447 rect->setRect(startGeometry.right() - width, startGeometry.top(),
448 width, height);
449 break;
450 default:
451 break;
452 }
453}
454
455void QGraphicsWidgetPrivate::windowFrameMouseMoveEvent(QGraphicsSceneMouseEvent *event)
456{
457 Q_Q(QGraphicsWidget);
458 if (!(event->buttons() & Qt::LeftButton) || hoveredSubControl != QStyle::SC_TitleBarLabel)
459 return;
460
461 QLineF delta(q->mapFromScene(event->buttonDownScenePos(Qt::LeftButton)), event->pos());
462 QLineF parentDelta(q->mapToParent(delta.p1()), q->mapToParent(delta.p2()));
463 QLineF parentXDelta(q->mapToParent(QPointF(delta.p1().x(), 0)), q->mapToParent(QPointF(delta.p2().x(), 0)));
464 QLineF parentYDelta(q->mapToParent(QPointF(0, delta.p1().y())), q->mapToParent(QPointF(0, delta.p2().y())));
465
466 QRectF newGeometry;
467 switch (grabbedSection) {
468 case Qt::LeftSection:
469 newGeometry = QRectF(startGeometry.topLeft() + QPointF(parentXDelta.dx(), parentXDelta.dy()),
470 startGeometry.size() - QSizeF(delta.dx(), delta.dy()));
471 break;
472 case Qt::TopLeftSection:
473 newGeometry = QRectF(startGeometry.topLeft() + QPointF(parentDelta.dx(), parentDelta.dy()),
474 startGeometry.size() - QSizeF(delta.dx(), delta.dy()));
475 break;
476 case Qt::TopSection:
477 newGeometry = QRectF(startGeometry.topLeft() + QPointF(parentYDelta.dx(), parentYDelta.dy()),
478 startGeometry.size() - QSizeF(0, delta.dy()));
479 break;
480 case Qt::TopRightSection:
481 newGeometry = QRectF(startGeometry.topLeft() + QPointF(parentYDelta.dx(), parentYDelta.dy()),
482 startGeometry.size() - QSizeF(-delta.dx(), delta.dy()));
483 break;
484 case Qt::RightSection:
485 newGeometry = QRectF(startGeometry.topLeft(),
486 startGeometry.size() + QSizeF(delta.dx(), 0));
487 break;
488 case Qt::BottomRightSection:
489 newGeometry = QRectF(startGeometry.topLeft(),
490 startGeometry.size() + QSizeF(delta.dx(), delta.dy()));
491 break;
492 case Qt::BottomSection:
493 newGeometry = QRectF(startGeometry.topLeft(),
494 startGeometry.size() + QSizeF(0, delta.dy()));
495 break;
496 case Qt::BottomLeftSection:
497 newGeometry = QRectF(startGeometry.topLeft() + QPointF(parentXDelta.dx(), parentXDelta.dy()),
498 startGeometry.size() - QSizeF(delta.dx(), -delta.dy()));
499 break;
500 case Qt::TitleBarArea:
501 newGeometry = QRectF(startGeometry.topLeft() + QPointF(parentDelta.dx(), parentDelta.dy()),
502 startGeometry.size());
503 break;
504 case Qt::NoSection:
505 break;
506 }
507
508 if (grabbedSection != Qt::NoSection) {
509 _q_boundGeometryToSizeConstraints(startGeometry, &newGeometry, grabbedSection,
510 q->effectiveSizeHint(Qt::MinimumSize),
511 q->effectiveSizeHint(Qt::MaximumSize));
512 q->setGeometry(newGeometry);
513 }
514}
515
516void QGraphicsWidgetPrivate::windowFrameHoverMoveEvent(QGraphicsSceneHoverEvent *event)
517{
518 Q_Q(QGraphicsWidget);
519 if (!hasDecoration())
520 return;
521
522 if (q->rect().contains(event->pos())) {
523 if (buttonMouseOver || hoveredSubControl != QStyle::SC_None)
524 windowFrameHoverLeaveEvent(event);
525 return;
526 }
527
528 bool wasMouseOver = buttonMouseOver;
529 QRect oldButtonRect = buttonRect;
530 buttonRect = QRect();
531 buttonMouseOver = false;
532 QPointF pos = event->pos();
533 QStyleOptionTitleBar bar;
534 // make sure that the coordinates (rect and pos) we send to the style are positive.
535 pos.rx() += leftWindowFrameMargin;
536 pos.ry() += topWindowFrameMargin;
537 initStyleOptionTitleBar(&bar);
538 bar.rect = q->windowFrameRect().toRect();
539 bar.rect.moveTo(0,0);
540 bar.rect.setHeight(int(titleBarHeight(bar)));
541
542 Qt::CursorShape cursorShape = Qt::ArrowCursor;
543 bool needsSetCursorCall = true;
544 switch (q->windowFrameSectionAt(event->pos())) {
545 case Qt::TopLeftSection:
546 case Qt::BottomRightSection:
547 cursorShape = Qt::SizeFDiagCursor;
548 break;
549 case Qt::TopRightSection:
550 case Qt::BottomLeftSection:
551 cursorShape = Qt::SizeBDiagCursor;
552 break;
553 case Qt::LeftSection:
554 case Qt::RightSection:
555 cursorShape = Qt::SizeHorCursor;
556 break;
557 case Qt::TopSection:
558 case Qt::BottomSection:
559 cursorShape = Qt::SizeVerCursor;
560 break;
561 case Qt::TitleBarArea:
562 buttonRect = q->style()->subControlRect(QStyle::CC_TitleBar, &bar, QStyle::SC_TitleBarCloseButton, 0);
563#ifdef Q_WS_MAC
564 // On mac we should hover if we are in the 'area' of the buttons
565 buttonRect |= q->style()->subControlRect(QStyle::CC_TitleBar, &bar, QStyle::SC_TitleBarMinButton, 0);
566 buttonRect |= q->style()->subControlRect(QStyle::CC_TitleBar, &bar, QStyle::SC_TitleBarMaxButton, 0);
567#endif
568 if (buttonRect.contains(pos.toPoint()))
569 buttonMouseOver = true;
570 event->ignore();
571 break;
572 default:
573 needsSetCursorCall = false;
574 event->ignore();
575 }
576#ifndef QT_NO_CURSOR
577 if (needsSetCursorCall)
578 q->setCursor(cursorShape);
579#endif
580 // update buttons if we hover over them
581 hoveredSubControl = q->style()->hitTestComplexControl(QStyle::CC_TitleBar, &bar, pos.toPoint(), 0);
582 if (hoveredSubControl != QStyle::SC_TitleBarCloseButton)
583 hoveredSubControl = QStyle::SC_TitleBarLabel;
584
585 if (buttonMouseOver != wasMouseOver) {
586 if (!oldButtonRect.isNull())
587 q->update(QRectF(oldButtonRect).translated(q->windowFrameRect().topLeft()));
588 if (!buttonRect.isNull())
589 q->update(QRectF(buttonRect).translated(q->windowFrameRect().topLeft()));
590 }
591}
592
593void QGraphicsWidgetPrivate::windowFrameHoverLeaveEvent(QGraphicsSceneHoverEvent *event)
594{
595 Q_UNUSED(event);
596 Q_Q(QGraphicsWidget);
597 if (hasDecoration()) {
598 // ### restore the cursor, don't override it
599#ifndef QT_NO_CURSOR
600 q->unsetCursor();
601#endif
602
603 bool needsUpdate = false;
604 if (hoveredSubControl == QStyle::SC_TitleBarCloseButton || buttonMouseOver)
605 needsUpdate = true;
606
607 // update the hover state (of buttons etc...)
608 hoveredSubControl = QStyle::SC_None;
609 buttonMouseOver = false;
610 buttonRect = QRect();
611 if (needsUpdate)
612 q->update(buttonRect);
613 }
614}
615
616bool QGraphicsWidgetPrivate::hasDecoration() const
617{
618 return (windowFlags & Qt::Window) && (windowFlags & Qt::WindowTitleHint);
619}
620
621/*!
622 \internal
623*/
624void QGraphicsWidgetPrivate::setFocusWidget()
625{
626 // Update focus child chain.
627 QGraphicsWidget *widget = static_cast<QGraphicsWidget *>(q_ptr);
628 QGraphicsWidget *parent = widget;
629 bool hidden = !visible;
630 do {
631 parent->d_func()->focusChild = widget;
632 } while (!parent->isWindow() && (parent = parent->parentWidget()) && (!hidden || !parent->d_func()->visible));
633}
634
635/*!
636 \internal
637*/
638void QGraphicsWidgetPrivate::clearFocusWidget()
639{
640 // Reset focus child chain.
641 QGraphicsWidget *parent = static_cast<QGraphicsWidget *>(q_ptr);
642 do {
643 if (parent->d_func()->focusChild != q_ptr)
644 break;
645 parent->d_func()->focusChild = 0;
646 } while (!parent->isWindow() && (parent = parent->parentWidget()));
647}
648
649/**
650 * is called after a reparent has taken place to fix up the focus chain(s)
651 */
652void QGraphicsWidgetPrivate::fixFocusChainBeforeReparenting(QGraphicsWidget *newParent, QGraphicsScene *newScene)
653{
654 Q_Q(QGraphicsWidget);
655
656 Q_ASSERT(focusNext && focusPrev);
657
658 QGraphicsWidget *n = q; //last one in 'new' list
659 QGraphicsWidget *o = 0; //last one in 'old' list
660
661 QGraphicsWidget *w = focusNext;
662
663 QGraphicsWidget *firstOld = 0;
664 bool wasPreviousNew = true;
665
666 if (focusChild) {
667 // Ensure that the current focus child doesn't leave pointers around
668 // before reparenting.
669 focusChild->clearFocus();
670 }
671
672 while (w != q) {
673 bool isCurrentNew = q->isAncestorOf(w);
674 if (isCurrentNew) {
675 if (!wasPreviousNew) {
676 n->d_func()->focusNext = w;
677 w->d_func()->focusPrev = n;
678 }
679 n = w;
680 } else /*if (!isCurrentNew)*/ {
681 if (wasPreviousNew) {
682 if (o) {
683 o->d_func()->focusNext = w;
684 w->d_func()->focusPrev = o;
685 } else {
686 firstOld = w;
687 }
688 }
689 o = w;
690 }
691 w = w->d_func()->focusNext;
692 wasPreviousNew = isCurrentNew;
693 }
694
695 // repair the 'old' chain
696 if (firstOld) {
697 o->d_func()->focusNext = firstOld;
698 firstOld->d_func()->focusPrev = o;
699 }
700
701 // update tabFocusFirst for oldScene if the item is going to be removed from oldScene
702 if (newParent)
703 newScene = newParent->scene();
704 QGraphicsScene *oldScene = q->scene();
705 if (oldScene && newScene != oldScene)
706 oldScene->d_func()->tabFocusFirst = firstOld;
707
708 QGraphicsItem *topLevelItem = newParent ? newParent->topLevelItem() : 0;
709 QGraphicsWidget *topLevel = 0;
710 if (topLevelItem && topLevelItem->isWidget())
711 topLevel = static_cast<QGraphicsWidget *>(topLevelItem);
712
713 if (topLevel && newParent) {
714 QGraphicsWidget *last = topLevel->d_func()->focusPrev;
715 // link last with new chain
716 last->d_func()->focusNext = q;
717 focusPrev = last;
718
719 // link last in chain with
720 topLevel->d_func()->focusPrev = n;
721 n->d_func()->focusNext = topLevel;
722 } else {
723 // q is the start of the focus chain
724 n->d_func()->focusNext = q;
725 focusPrev = n;
726 }
727
728}
729
730void QGraphicsWidgetPrivate::setLayout_helper(QGraphicsLayout *l)
731{
732 delete (this->layout);
733 layout = l;
734 if (!l) {
735 Q_Q(QGraphicsWidget);
736 q->updateGeometry();
737 }
738}
739
740QT_END_NAMESPACE
741
742#endif //QT_NO_GRAPHICSVIEW
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