qitemeditorfactory.cpp

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38****************************************************************************/-
39-
40#include <qplatformdefs.h>-
41#include "qitemeditorfactory.h"-
42#include "qitemeditorfactory_p.h"-
43-
44#ifndef QT_NO_ITEMVIEWS-
45-
46#include <qcombobox.h>-
47#include <qdatetimeedit.h>-
48#include <qlabel.h>-
49#include <qlineedit.h>-
50#include <qspinbox.h>-
51#include <limits.h>-
52#include <float.h>-
53#include <qapplication.h>-
54#include <qdebug.h>-
55-
56#include <algorithm>-
57QT_BEGIN_NAMESPACE-
58-
59-
60#ifndef QT_NO_COMBOBOX-
61-
62class QBooleanComboBox : public QComboBox-
63{-
64 Q_OBJECT-
65 Q_PROPERTY(bool value READ value WRITE setValue USER true)-
66-
67public:-
68 QBooleanComboBox(QWidget *parent);-
69 void setValue(bool);-
70 bool value() const;-
71};-
72-
73#endif // QT_NO_COMBOBOX-
74-
75-
76#ifndef QT_NO_SPINBOX-
77-
78class QUIntSpinBox : public QSpinBox-
79{-
80 Q_OBJECT-
81 Q_PROPERTY(uint value READ uintValue WRITE setUIntValue NOTIFY uintValueChanged USER true)-
82public:-
83 explicit QUIntSpinBox(QWidget *parent = 0)-
84 : QSpinBox(parent)-
85 {-
86 connect(this, SIGNAL(valueChanged(int)), SIGNAL(uintValueChanged()));-
87 }
never executed: end of block
0
88-
89 uint uintValue()-
90 {-
91 return value();
never executed: return value();
0
92 }-
93-
94 void setUIntValue(uint value_)-
95 {-
96 return setValue(value_);
never executed: return setValue(value_);
0
97 }-
98-
99Q_SIGNALS:-
100 void uintValueChanged();-
101};-
102-
103#endif // QT_NO_SPINBOX-
104-
105/*!-
106 \class QItemEditorFactory-
107 \brief The QItemEditorFactory class provides widgets for editing item data-
108 in views and delegates.-
109 \since 4.2-
110 \ingroup model-view-
111 \inmodule QtWidgets-
112-
113 When editing data in an item view, editors are created and-
114 displayed by a delegate. QItemDelegate, which is the delegate by-
115 default installed on Qt's item views, uses a QItemEditorFactory to-
116 create editors for it. A default unique instance provided by-
117 QItemEditorFactory is used by all item delegates. If you set a-
118 new default factory with setDefaultFactory(), the new factory will-
119 be used by existing and new delegates.-
120-
121 A factory keeps a collection of QItemEditorCreatorBase-
122 instances, which are specialized editors that produce editors-
123 for one particular QVariant data type (All Qt models store-
124 their data in \l{QVariant}s).-
125-
126 \section1 Standard Editing Widgets-
127-
128 The standard factory implementation provides editors for a variety of data-
129 types. These are created whenever a delegate needs to provide an editor for-
130 data supplied by a model. The following table shows the relationship between-
131 types and the standard editors provided.-
132-
133 \table-
134 \header \li Type \li Editor Widget-
135 \row \li bool \li QComboBox-
136 \row \li double \li QDoubleSpinBox-
137 \row \li int \li{1,2} QSpinBox-
138 \row \li unsigned int-
139 \row \li QDate \li QDateEdit-
140 \row \li QDateTime \li QDateTimeEdit-
141 \row \li QPixmap \li QLabel-
142 \row \li QString \li QLineEdit-
143 \row \li QTime \li QTimeEdit-
144 \endtable-
145-
146 Additional editors can be registered with the registerEditor() function.-
147-
148 \sa QItemDelegate, {Model/View Programming}, {Color Editor Factory Example}-
149*/-
150-
151/*!-
152 \fn QItemEditorFactory::QItemEditorFactory()-
153-
154 Constructs a new item editor factory.-
155*/-
156-
157/*!-
158 Creates an editor widget with the given \a parent for the specified \a userType of data,-
159 and returns it as a QWidget.-
160-
161 \sa registerEditor()-
162*/-
163QWidget *QItemEditorFactory::createEditor(int userType, QWidget *parent) const-
164{-
165 QItemEditorCreatorBase *creator = creatorMap.value(userType, 0);-
166 if (!creator) {
!creatorDescription
TRUEnever evaluated
FALSEnever evaluated
0
167 const QItemEditorFactory *dfactory = defaultFactory();-
168 return dfactory == this ? 0 : dfactory->createEditor(userType, parent);
never executed: return dfactory == this ? 0 : dfactory->createEditor(userType, parent);
0
169 }-
170 return creator->createWidget(parent);
never executed: return creator->createWidget(parent);
0
171}-
172-
173/*!-
174 Returns the property name used to access data for the given \a userType of data.-
175*/-
176QByteArray QItemEditorFactory::valuePropertyName(int userType) const-
177{-
178 QItemEditorCreatorBase *creator = creatorMap.value(userType, 0);-
179 if (!creator) {
!creatorDescription
TRUEnever evaluated
FALSEnever evaluated
0
180 const QItemEditorFactory *dfactory = defaultFactory();-
181 return dfactory == this ? QByteArray() : dfactory->valuePropertyName(userType);
never executed: return dfactory == this ? QByteArray() : dfactory->valuePropertyName(userType);
0
182 }-
183 return creator->valuePropertyName();
never executed: return creator->valuePropertyName();
0
184}-
185-
186/*!-
187 Destroys the item editor factory.-
188*/-
189QItemEditorFactory::~QItemEditorFactory()-
190{-
191 //we make sure we delete all the QItemEditorCreatorBase-
192 //this has to be done only once, hence the QSet-
193 QSet<QItemEditorCreatorBase*> set = creatorMap.values().toSet();-
194 qDeleteAll(set);-
195}
never executed: end of block
0
196-
197/*!-
198 Registers an item editor creator specified by \a creator for the given \a userType of data.-
199-
200 \b{Note:} The factory takes ownership of the item editor creator and will destroy-
201 it if a new creator for the same type is registered later.-
202-
203 \sa createEditor()-
204*/-
205void QItemEditorFactory::registerEditor(int userType, QItemEditorCreatorBase *creator)-
206{-
207 const auto it = creatorMap.constFind(userType);-
208 if (it != creatorMap.cend()) {
it != creatorMap.cend()Description
TRUEnever evaluated
FALSEnever evaluated
0
209 QItemEditorCreatorBase *oldCreator = it.value();-
210 Q_ASSERT(oldCreator);-
211 creatorMap.erase(it);-
212 if (std::find(creatorMap.cbegin(), creatorMap.cend(), oldCreator) == creatorMap.cend())
std::find(crea...atorMap.cend()Description
TRUEnever evaluated
FALSEnever evaluated
0
213 delete oldCreator; // if it is no more in use we can delete it
never executed: delete oldCreator;
0
214 }
never executed: end of block
0
215-
216 creatorMap[userType] = creator;-
217}
never executed: end of block
0
218-
219class QDefaultItemEditorFactory : public QItemEditorFactory-
220{-
221public:-
222 inline QDefaultItemEditorFactory() {}-
223 QWidget *createEditor(int userType, QWidget *parent) const Q_DECL_OVERRIDE;-
224 QByteArray valuePropertyName(int) const Q_DECL_OVERRIDE;-
225};-
226-
227QWidget *QDefaultItemEditorFactory::createEditor(int userType, QWidget *parent) const-
228{-
229 switch (userType) {-
230#ifndef QT_NO_COMBOBOX-
231 case QVariant::Bool: {
never executed: case QVariant::Bool:
0
232 QBooleanComboBox *cb = new QBooleanComboBox(parent);-
233 cb->setFrame(false);-
234 return cb; }
never executed: return cb;
0
235#endif-
236#ifndef QT_NO_SPINBOX-
237 case QVariant::UInt: {
never executed: case QVariant::UInt:
0
238 QSpinBox *sb = new QUIntSpinBox(parent);-
239 sb->setFrame(false);-
240 sb->setMinimum(0);-
241 sb->setMaximum(INT_MAX);-
242 return sb; }
never executed: return sb;
0
243 case QVariant::Int: {
never executed: case QVariant::Int:
0
244 QSpinBox *sb = new QSpinBox(parent);-
245 sb->setFrame(false);-
246 sb->setMinimum(INT_MIN);-
247 sb->setMaximum(INT_MAX);-
248 return sb; }
never executed: return sb;
0
249#endif-
250#ifndef QT_NO_DATETIMEEDIT-
251 case QVariant::Date: {
never executed: case QVariant::Date:
0
252 QDateTimeEdit *ed = new QDateEdit(parent);-
253 ed->setFrame(false);-
254 return ed; }
never executed: return ed;
0
255 case QVariant::Time: {
never executed: case QVariant::Time:
0
256 QDateTimeEdit *ed = new QTimeEdit(parent);-
257 ed->setFrame(false);-
258 return ed; }
never executed: return ed;
0
259 case QVariant::DateTime: {
never executed: case QVariant::DateTime:
0
260 QDateTimeEdit *ed = new QDateTimeEdit(parent);-
261 ed->setFrame(false);-
262 return ed; }
never executed: return ed;
0
263#endif-
264 case QVariant::Pixmap:
never executed: case QVariant::Pixmap:
0
265 return new QLabel(parent);
never executed: return new QLabel(parent);
0
266#ifndef QT_NO_SPINBOX-
267 case QVariant::Double: {
never executed: case QVariant::Double:
0
268 QDoubleSpinBox *sb = new QDoubleSpinBox(parent);-
269 sb->setFrame(false);-
270 sb->setMinimum(-DBL_MAX);-
271 sb->setMaximum(DBL_MAX);-
272 return sb; }
never executed: return sb;
0
273#endif-
274#ifndef QT_NO_LINEEDIT-
275 case QVariant::String:
never executed: case QVariant::String:
0
276 default: {
never executed: default:
0
277 // the default editor is a lineedit-
278 QExpandingLineEdit *le = new QExpandingLineEdit(parent);-
279 le->setFrame(le->style()->styleHint(QStyle::SH_ItemView_DrawDelegateFrame, 0, le));-
280 if (!le->style()->styleHint(QStyle::SH_ItemView_ShowDecorationSelected, 0, le))
!le->style()->...lected, 0, le)Description
TRUEnever evaluated
FALSEnever evaluated
0
281 le->setWidgetOwnsGeometry(true);
never executed: le->setWidgetOwnsGeometry(true);
0
282 return le; }
never executed: return le;
0
283#else-
284 default:-
285 break;-
286#endif-
287 }-
288 return 0;
dead code: return 0;
-
289}-
290-
291QByteArray QDefaultItemEditorFactory::valuePropertyName(int userType) const-
292{-
293 switch (userType) {-
294#ifndef QT_NO_COMBOBOX-
295 case QVariant::Bool:
never executed: case QVariant::Bool:
0
296 return "currentIndex";
never executed: return "currentIndex";
0
297#endif-
298#ifndef QT_NO_SPINBOX-
299 case QVariant::UInt:
never executed: case QVariant::UInt:
0
300 case QVariant::Int:
never executed: case QVariant::Int:
0
301 case QVariant::Double:
never executed: case QVariant::Double:
0
302 return "value";
never executed: return "value";
0
303#endif-
304#ifndef QT_NO_DATETIMEEDIT-
305 case QVariant::Date:
never executed: case QVariant::Date:
0
306 return "date";
never executed: return "date";
0
307 case QVariant::Time:
never executed: case QVariant::Time:
0
308 return "time";
never executed: return "time";
0
309 case QVariant::DateTime:
never executed: case QVariant::DateTime:
0
310 return "dateTime";
never executed: return "dateTime";
0
311#endif-
312 case QVariant::String:
never executed: case QVariant::String:
0
313 default:
never executed: default:
0
314 // the default editor is a lineedit-
315 return "text";
never executed: return "text";
0
316 }-
317}-
318-
319static QItemEditorFactory *q_default_factory = 0;-
320struct QDefaultFactoryCleaner-
321{-
322 inline QDefaultFactoryCleaner() {}-
323 ~QDefaultFactoryCleaner() { delete q_default_factory; q_default_factory = 0; }
never executed: end of block
0
324};-
325-
326/*!-
327 Returns the default item editor factory.-
328-
329 \sa setDefaultFactory()-
330*/-
331const QItemEditorFactory *QItemEditorFactory::defaultFactory()-
332{-
333 static const QDefaultItemEditorFactory factory;-
334 if (q_default_factory)
q_default_factoryDescription
TRUEnever evaluated
FALSEnever evaluated
0
335 return q_default_factory;
never executed: return q_default_factory;
0
336 return &factory;
never executed: return &factory;
0
337}-
338-
339/*!-
340 Sets the default item editor factory to the given \a factory.-
341 Both new and existing delegates will use the new factory.-
342-
343 \sa defaultFactory()-
344*/-
345void QItemEditorFactory::setDefaultFactory(QItemEditorFactory *factory)-
346{-
347 static const QDefaultFactoryCleaner cleaner;-
348 delete q_default_factory;-
349 q_default_factory = factory;-
350}
never executed: end of block
0
351-
352/*!-
353 \class QItemEditorCreatorBase-
354 \brief The QItemEditorCreatorBase class provides an abstract base class that-
355 must be subclassed when implementing new item editor creators.-
356 \since 4.2-
357 \ingroup model-view-
358 \inmodule QtWidgets-
359-
360 QItemEditorCreatorBase objects are specialized widget factories that-
361 provide editor widgets for one particular QVariant data type. They-
362 are used by QItemEditorFactory to create editors for-
363 \l{QItemDelegate}s. Creator bases must be registered with-
364 QItemEditorFactory::registerEditor().-
365-
366 An editor should provide a user property for the data it edits.-
367 QItemDelagates can then access the property using Qt's-
368 \l{Meta-Object System}{meta-object system} to set and retrieve the-
369 editing data. A property is set as the user property with the USER-
370 keyword:-
371-
372 \snippet code/src_gui_itemviews_qitemeditorfactory.cpp 0-
373-
374 If the editor does not provide a user property, it must return the-
375 name of the property from valuePropertyName(); delegates will then-
376 use the name to access the property. If a user property exists,-
377 item delegates will not call valuePropertyName().-
378-
379 QStandardItemEditorCreator is a convenience template class that can be used-
380 to register widgets without the need to subclass QItemEditorCreatorBase.-
381-
382 \sa QStandardItemEditorCreator, QItemEditorFactory,-
383 {Model/View Programming}, {Color Editor Factory Example}-
384*/-
385-
386/*!-
387 \fn QItemEditorCreatorBase::~QItemEditorCreatorBase()-
388-
389 Destroys the editor creator object.-
390*/-
391QItemEditorCreatorBase::~QItemEditorCreatorBase()-
392{-
393-
394}-
395-
396/*!-
397 \fn QWidget *QItemEditorCreatorBase::createWidget(QWidget *parent) const-
398-
399 Returns an editor widget with the given \a parent.-
400-
401 When implementing this function in subclasses of this class, you must-
402 construct and return new editor widgets with the parent widget specified.-
403*/-
404-
405/*!-
406 \fn QByteArray QItemEditorCreatorBase::valuePropertyName() const-
407-
408 Returns the name of the property used to get and set values in the creator's-
409 editor widgets.-
410-
411 When implementing this function in subclasses, you must ensure that the-
412 editor widget's property specified by this function can accept the type-
413 the creator is registered for. For example, a creator which constructs-
414 QCheckBox widgets to edit boolean values would return the-
415 \l{QCheckBox::checkable}{checkable} property name from this function,-
416 and must be registered in the item editor factory for the QVariant::Bool-
417 type.-
418-
419 Note: Since Qt 4.2 the item delegates query the user property of widgets,-
420 and only call this function if the widget has no user property. You can-
421 override this behavior by reimplementing QAbstractItemDelegate::setModelData()-
422 and QAbstractItemDelegate::setEditorData().-
423-
424 \sa QMetaObject::userProperty(), QItemEditorFactory::registerEditor()-
425*/-
426-
427/*!-
428 \class QItemEditorCreator-
429 \brief The QItemEditorCreator class makes it possible to create-
430 item editor creator bases without subclassing-
431 QItemEditorCreatorBase.-
432-
433 \since 4.2-
434 \ingroup model-view-
435 \inmodule QtWidgets-
436-
437 QItemEditorCreator is a convenience template class. It uses-
438 the template class to create editors for QItemEditorFactory.-
439 This way, it is not necessary to subclass-
440 QItemEditorCreatorBase.-
441-
442 \snippet code/src_gui_itemviews_qitemeditorfactory.cpp 1-
443-
444 The constructor takes the name of the property that contains the-
445 editing data. QItemDelegate can then access the property by name-
446 when it sets and retrieves editing data. Only use this class if-
447 your editor does not define a user property (using the USER-
448 keyword in the Q_PROPERTY macro). If the widget has a user-
449 property, you should use QStandardItemEditorCreator instead.-
450-
451 \sa QItemEditorCreatorBase, QStandardItemEditorCreator,-
452 QItemEditorFactory, {Color Editor Factory Example}-
453*/-
454-
455/*!-
456 \fn QItemEditorCreator::QItemEditorCreator(const QByteArray &valuePropertyName)-
457-
458 Constructs an editor creator object using \a valuePropertyName-
459 as the name of the property to be used for editing. The-
460 property name is used by QItemDelegate when setting and-
461 getting editor data.-
462-
463 Note that the \a valuePropertyName is only used if the editor-
464 widget does not have a user property defined.-
465*/-
466-
467/*!-
468 \fn QWidget *QItemEditorCreator::createWidget(QWidget *parent) const-
469 \reimp-
470*/-
471-
472/*!-
473 \fn QByteArray QItemEditorCreator::valuePropertyName() const-
474 \reimp-
475*/-
476-
477/*!-
478 \class QStandardItemEditorCreator-
479-
480 \brief The QStandardItemEditorCreator class provides the-
481 possibility to register widgets without having to subclass-
482 QItemEditorCreatorBase.-
483-
484 \since 4.2-
485 \ingroup model-view-
486 \inmodule QtWidgets-
487-
488 This convenience template class makes it possible to register widgets without-
489 having to subclass QItemEditorCreatorBase.-
490-
491 Example:-
492-
493 \snippet code/src_gui_itemviews_qitemeditorfactory.cpp 2-
494-
495 Setting the \c editorFactory created above in an item delegate via-
496 QItemDelegate::setItemEditorFactory() makes sure that all values of type-
497 QVariant::DateTime will be edited in \c{MyFancyDateTimeEdit}.-
498-
499 The editor must provide a user property that will contain the-
500 editing data. The property is used by \l{QItemDelegate}s to set-
501 and retrieve the data (using Qt's \l{Meta-Object-
502 System}{meta-object system}). You set the user property with-
503 the USER keyword:-
504-
505 \snippet code/src_gui_itemviews_qitemeditorfactory.cpp 3-
506-
507 \sa QItemEditorCreatorBase, QItemEditorCreator,-
508 QItemEditorFactory, QItemDelegate, {Color Editor Factory Example}-
509*/-
510-
511/*!-
512 \fn QStandardItemEditorCreator::QStandardItemEditorCreator()-
513-
514 Constructs an editor creator object.-
515*/-
516-
517/*!-
518 \fn QWidget *QStandardItemEditorCreator::createWidget(QWidget *parent) const-
519 \reimp-
520*/-
521-
522/*!-
523 \fn QByteArray QStandardItemEditorCreator::valuePropertyName() const-
524 \reimp-
525*/-
526-
527#ifndef QT_NO_LINEEDIT-
528-
529QExpandingLineEdit::QExpandingLineEdit(QWidget *parent)-
530 : QLineEdit(parent), originalWidth(-1), widgetOwnsGeometry(false)-
531{-
532 connect(this, SIGNAL(textChanged(QString)), this, SLOT(resizeToContents()));-
533 updateMinimumWidth();-
534}
never executed: end of block
0
535-
536void QExpandingLineEdit::changeEvent(QEvent *e)-
537{-
538 switch (e->type())-
539 {-
540 case QEvent::FontChange:
never executed: case QEvent::FontChange:
0
541 case QEvent::StyleChange:
never executed: case QEvent::StyleChange:
0
542 case QEvent::ContentsRectChange:
never executed: case QEvent::ContentsRectChange:
0
543 updateMinimumWidth();-
544 break;
never executed: break;
0
545 default:
never executed: default:
0
546 break;
never executed: break;
0
547 }-
548-
549 QLineEdit::changeEvent(e);-
550}
never executed: end of block
0
551-
552void QExpandingLineEdit::updateMinimumWidth()-
553{-
554 int left, right;-
555 getTextMargins(&left, 0, &right, 0);-
556 int width = left + right + 4 /*horizontalMargin in qlineedit.cpp*/;-
557 getContentsMargins(&left, 0, &right, 0);-
558 width += left + right;-
559-
560 QStyleOptionFrame opt;-
561 initStyleOption(&opt);-
562-
563 int minWidth = style()->sizeFromContents(QStyle::CT_LineEdit, &opt, QSize(width, 0).-
564 expandedTo(QApplication::globalStrut()), this).width();-
565 setMinimumWidth(minWidth);-
566}
never executed: end of block
0
567-
568void QExpandingLineEdit::resizeToContents()-
569{-
570 int oldWidth = width();-
571 if (originalWidth == -1)
originalWidth == -1Description
TRUEnever evaluated
FALSEnever evaluated
0
572 originalWidth = oldWidth;
never executed: originalWidth = oldWidth;
0
573 if (QWidget *parent = parentWidget()) {
QWidget *paren...parentWidget()Description
TRUEnever evaluated
FALSEnever evaluated
0
574 QPoint position = pos();-
575 int hintWidth = minimumWidth() + fontMetrics().width(displayText());-
576 int parentWidth = parent->width();-
577 int maxWidth = isRightToLeft() ? position.x() + oldWidth : parentWidth - position.x();
isRightToLeft()Description
TRUEnever evaluated
FALSEnever evaluated
0
578 int newWidth = qBound(originalWidth, hintWidth, maxWidth);-
579 if (widgetOwnsGeometry)
widgetOwnsGeometryDescription
TRUEnever evaluated
FALSEnever evaluated
0
580 setMaximumWidth(newWidth);
never executed: setMaximumWidth(newWidth);
0
581 if (isRightToLeft())
isRightToLeft()Description
TRUEnever evaluated
FALSEnever evaluated
0
582 move(position.x() - newWidth + oldWidth, position.y());
never executed: move(position.x() - newWidth + oldWidth, position.y());
0
583 resize(newWidth, height());-
584 }
never executed: end of block
0
585}
never executed: end of block
0
586-
587#endif // QT_NO_LINEEDIT-
588-
589#ifndef QT_NO_COMBOBOX-
590-
591QBooleanComboBox::QBooleanComboBox(QWidget *parent)-
592 : QComboBox(parent)-
593{-
594 addItem(QComboBox::tr("False"));-
595 addItem(QComboBox::tr("True"));-
596}
never executed: end of block
0
597-
598void QBooleanComboBox::setValue(bool value)-
599{-
600 setCurrentIndex(value ? 1 : 0);-
601}
never executed: end of block
0
602-
603bool QBooleanComboBox::value() const-
604{-
605 return (currentIndex() == 1);
never executed: return (currentIndex() == 1);
0
606}-
607-
608#endif // QT_NO_COMBOBOX-
609-
610QT_END_NAMESPACE-
611-
612#if !defined(QT_NO_LINEEDIT) || !defined(QT_NO_COMBOBOX)-
613#include "qitemeditorfactory.moc"-
614#endif-
615-
616#include "moc_qitemeditorfactory_p.cpp"-
617-
618#endif // QT_NO_ITEMVIEWS-
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