Add USER properties to QDateEdit and QTimeEdit.

Both classes had such components before, but there were issues with
the NOTIFY signal not being in the same class as the Q_PROPERTY.

This patch solves that problem by using a signal of a different name.

Task-number: QTBUG-15731
Change-Id: Ibc7ce4dba8a6b88c05d62a90e14d0101c5cd3082
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Reviewed-by: Thorbjørn Lund Martsum <tmartsum@gmail.com>

dist/changes-5.0.0

@@ -395,6 +395,11 @@ QtWidgets
   * ResizeMode resizeMode(int logicalindex) const -
     use sectionResizeMode(int logicalindex) instead.
 
+* QDateEdit and QTimeEdit have re-gained a USER property. These were originally removed
+    before Qt 4.7.0, and are re-added for 5.0. This means that the userProperty for
+    those classes are now QDate and QTime respectively, not QDateTime as they have been
+    for the 4.7 and 4.8 releases.
+
 QtNetwork
 ---------
 * QHostAddress::isLoopback() API added. Returns true if the address is

src/widgets/itemviews/qitemdelegate.cpp

@@ -555,18 +555,6 @@ void QItemDelegate::setEditorData(QWidget *editor, const QModelIndex &index) con
     QVariant v = index.data(Qt::EditRole);
     QByteArray n = editor->metaObject()->userProperty().name();
 
-    // ### Qt 5: remove
-    // A work-around for missing "USER true" in qdatetimeedit.h for
-    // QTimeEdit's time property and QDateEdit's date property.
-    // It only triggers if the default user property "dateTime" is
-    // reported for QTimeEdit and QDateEdit.
-    if (n == "dateTime") {
-        if (editor->inherits("QTimeEdit"))
-            n = "time";
-        else if (editor->inherits("QDateEdit"))
-            n = "date";
-    }
-
     // ### Qt 5: give QComboBox a USER property
     if (n.isEmpty() && editor->inherits("QComboBox"))
         n = d->editorFactory()->valuePropertyName(v.userType());

src/widgets/itemviews/qstyleditemdelegate.cpp

@@ -492,18 +492,6 @@ void QStyledItemDelegate::setEditorData(QWidget *editor, const QModelIndex &inde
     QVariant v = index.data(Qt::EditRole);
     QByteArray n = editor->metaObject()->userProperty().name();
 
-    // ### Qt 5: remove
-    // A work-around for missing "USER true" in qdatetimeedit.h for
-    // QTimeEdit's time property and QDateEdit's date property.
-    // It only triggers if the default user property "dateTime" is
-    // reported for QTimeEdit and QDateEdit.
-    if (n == "dateTime") {
-        if (editor->inherits("QTimeEdit"))
-            n = "time";
-        else if (editor->inherits("QDateEdit"))
-            n = "date";
-    }
-
     // ### Qt 5: give QComboBox a USER property
     if (n.isEmpty() && editor->inherits("QComboBox"))
         n = d->editorFactory()->valuePropertyName(v.userType());

src/widgets/widgets/qdatetimeedit.cpp

@@ -1549,6 +1549,7 @@ void QDateTimeEdit::mousePressEvent(QMouseEvent *event)
 QTimeEdit::QTimeEdit(QWidget *parent)
     : QDateTimeEdit(QDATETIMEEDIT_TIME_MIN, QVariant::Time, parent)
 {
+    connect(this, SIGNAL(timeChanged(QTime)), SIGNAL(userTimeChanged(QTime)));
 }
 
 /*!
@@ -1561,6 +1562,15 @@ QTimeEdit::QTimeEdit(const QTime &time, QWidget *parent)
 {
 }
 
+/*!
+  \fn void QTimeEdit::userTimeChanged(const QTime &time)
+
+  This signal only exists to fully implement the time Q_PROPERTY on the class.
+  Normally timeChanged should be used instead.
+
+  \internal
+*/
+
 
 /*!
   \class QDateEdit
@@ -1603,6 +1613,7 @@ QTimeEdit::QTimeEdit(const QTime &time, QWidget *parent)
 QDateEdit::QDateEdit(QWidget *parent)
     : QDateTimeEdit(QDATETIMEEDIT_DATE_INITIAL, QVariant::Date, parent)
 {
+    connect(this, SIGNAL(dateChanged(QDate)), SIGNAL(userDateChanged(QDate)));
 }
 
 /*!
@@ -1615,6 +1626,15 @@ QDateEdit::QDateEdit(const QDate &date, QWidget *parent)
 {
 }
 
+/*!
+  \fn void QDateEdit::userDateChanged(const QDate &date)
+
+  This signal only exists to fully implement the date Q_PROPERTY on the class.
+  Normally dateChanged should be used instead.
+
+  \internal
+*/
+
 
 // --- QDateTimeEditPrivate ---
 

src/widgets/widgets/qdatetimeedit.h

@@ -205,17 +205,25 @@ private:
 class Q_WIDGETS_EXPORT QTimeEdit : public QDateTimeEdit
 {
     Q_OBJECT
+    Q_PROPERTY(QTime time READ time WRITE setTime NOTIFY userTimeChanged USER true)
 public:
     QTimeEdit(QWidget *parent = 0);
     QTimeEdit(const QTime &time, QWidget *parent = 0);
+
+Q_SIGNALS:
+    void userTimeChanged(const QTime &time);
 };
 
 class Q_WIDGETS_EXPORT QDateEdit : public QDateTimeEdit
 {
     Q_OBJECT
+    Q_PROPERTY(QDate date READ date WRITE setDate NOTIFY userDateChanged USER true)
 public:
     QDateEdit(QWidget *parent = 0);
     QDateEdit(const QDate &date, QWidget *parent = 0);
+
+Q_SIGNALS:
+    void userDateChanged(const QDate &date);
 };
 
 Q_DECLARE_OPERATORS_FOR_FLAGS(QDateTimeEdit::Sections)

tests/auto/widgets/itemviews/qitemdelegate/tst_qitemdelegate.cpp

@@ -780,6 +780,9 @@ void tst_QItemDelegate::dateTimeEditor()
     QTimeEdit *timeEditor = qFindChild<QTimeEdit *>(widget.viewport());
     QVERIFY(timeEditor);
     QCOMPARE(timeEditor->time(), time);
+    // The data must actually be different in order for the model
+    // to be updated.
+    timeEditor->setTime(time.addSecs(60));
 
     widget.clearFocus();
     qApp->setActiveWindow(&widget);
@@ -791,6 +794,7 @@ void tst_QItemDelegate::dateTimeEditor()
     QDateEdit *dateEditor = qFindChild<QDateEdit *>(widget.viewport());
     QVERIFY(dateEditor);
     QCOMPARE(dateEditor->date(), date);
+    dateEditor->setDate(date.addDays(60));
 
     widget.clearFocus();
     widget.setFocus();
@@ -806,6 +810,12 @@ void tst_QItemDelegate::dateTimeEditor()
     QVERIFY(dateTimeEditor);
     QCOMPARE(dateTimeEditor->date(), date);
     QCOMPARE(dateTimeEditor->time(), time);
+    dateTimeEditor->setTime(time.addSecs(600));
+    widget.clearFocus();
+
+    QVERIFY(item1->data(Qt::EditRole).userType() == QMetaType::QTime);
+    QVERIFY(item2->data(Qt::EditRole).userType() == QMetaType::QDate);
+    QVERIFY(item3->data(Qt::EditRole).userType() == QMetaType::QDateTime);
 }
 
 void tst_QItemDelegate::decoration_data()