Incorporate QQuickDialog::result from QQuickPlatformDialog

The experimental QQuickPlatformDialog in Qt.labs.platform had a bit
more elaborate accepted vs. rejected dialog result handling. Copy the
same logic to QQuickDialog in QtQuick.Controls.

[ChangeLog][Controls][Dialog] Added "result" property that holds
whether the dialog was previously accepted or rejected.

Change-Id: I2c55848b5eeaad2130d32a337c2590212736f22c
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

3 files changed, 65 insertions, 8 deletions

diff --git a/src/quicktemplates2/qquickdialog.cpp b/src/quicktemplates2/qquickdialog.cpp
index 3ac99caa..00719ae4 100644
--- a/src/quicktemplates2/qquickdialog.cpp
+++ b/src/quicktemplates2/qquickdialog.cpp
@@ -301,16 +301,43 @@ void QQuickDialog::setStandardButtons(QPlatformDialogHelper::StandardButtons but
 }
 
 /*!
+    \since QtQuick.Controls 2.3
+    \qmlproperty int QtQuick.Controls::Dialog::result
+
+    This property holds the result code.
+
+    Standard result codes:
+    \value Dialog.Accepted The dialog was accepted.
+    \value Dialog.Rejected The dialog was rejected.
+
+    \sa accept(), reject(), done()
+*/
+int QQuickDialog::result() const
+{
+    Q_D(const QQuickDialog);
+    return d->result;
+}
+
+void QQuickDialog::setResult(int result)
+{
+    Q_D(QQuickDialog);
+    if (d->result == result)
+        return;
+
+    d->result = result;
+    emit resultChanged();
+}
+
+/*!
     \qmlmethod void QtQuick.Controls::Dialog::accept()
 
     Closes the dialog and emits the \l accepted() signal.
 
-    \sa reject()
+    \sa reject(), done()
 */
 void QQuickDialog::accept()
 {
-    close();
-    emit accepted();
+    done(Accepted);
 }
 
 /*!
@@ -318,12 +345,32 @@ void QQuickDialog::accept()
 
     Closes the dialog and emits the \l rejected() signal.
 
-    \sa accept()
+    \sa accept(), done()
 */
 void QQuickDialog::reject()
 {
+    done(Rejected);
+}
+
+/*!
+    \since QtQuick.Controls 2.3
+    \qmlmethod void Qt.labs.platform::Dialog::done(int result)
+
+    Closes the dialog, sets the \a result, and emits \l accepted() or
+    \l rejected() depending on whether the result is \c Dialog.Accepted
+    or \c Dialog.Rejected, respectively.
+
+    \sa accept(), reject(), result
+*/
+void QQuickDialog::done(int result)
+{
     close();
-    emit rejected();
+    setResult(result);
+
+    if (result == Accepted)
+        emit accepted();
+    else if (result == Rejected)
+        emit rejected();
 }
 
 void QQuickDialog::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
diff --git a/src/quicktemplates2/qquickdialog_p.h b/src/quicktemplates2/qquickdialog_p.h
index 97c90a59..0743ee0a 100644
--- a/src/quicktemplates2/qquickdialog_p.h
+++ b/src/quicktemplates2/qquickdialog_p.h
@@ -62,6 +62,7 @@ class Q_QUICKTEMPLATES2_PRIVATE_EXPORT QQuickDialog : public QQuickPopup
     Q_PROPERTY(QQuickItem *header READ header WRITE setHeader NOTIFY headerChanged FINAL)
     Q_PROPERTY(QQuickItem *footer READ footer WRITE setFooter NOTIFY footerChanged FINAL)
     Q_PROPERTY(QPlatformDialogHelper::StandardButtons standardButtons READ standardButtons WRITE setStandardButtons NOTIFY standardButtonsChanged FINAL)
+    Q_PROPERTY(int result READ result WRITE setResult NOTIFY resultChanged FINAL REVISION 3)
     Q_FLAGS(QPlatformDialogHelper::StandardButtons)
 
 public:
@@ -79,9 +80,16 @@ public:
     QPlatformDialogHelper::StandardButtons standardButtons() const;
     void setStandardButtons(QPlatformDialogHelper::StandardButtons buttons);
 
+    enum StandardCode { Rejected, Accepted };
+    Q_ENUM(StandardCode)
+
+    int result() const;
+    void setResult(int result);
+
 public Q_SLOTS:
-    void accept();
-    void reject();
+    virtual void accept();
+    virtual void reject();
+    virtual void done(int result);
 
 Q_SIGNALS:
     void accepted();
@@ -91,6 +99,7 @@ Q_SIGNALS:
     void headerChanged();
     void footerChanged();
     void standardButtonsChanged();
+    Q_REVISION(3) void resultChanged();
 
 protected:
     void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) override;
diff --git a/src/quicktemplates2/qquickdialog_p_p.h b/src/quicktemplates2/qquickdialog_p_p.h
index 13885ca9..2a0f4b53 100644
--- a/src/quicktemplates2/qquickdialog_p_p.h
+++ b/src/quicktemplates2/qquickdialog_p_p.h
@@ -60,13 +60,14 @@ class QQuickDialogPrivate : public QQuickPopupPrivate
     Q_DECLARE_PUBLIC(QQuickDialog)
 
 public:
-    QQuickDialogPrivate() : buttonBox(nullptr) { }
+    QQuickDialogPrivate() : result(0), buttonBox(nullptr) { }
 
     static QQuickDialogPrivate *get(QQuickDialog *dialog)
     {
         return dialog->d_func();
     }
 
+    int result;
     QString title;
     QQuickDialogButtonBox *buttonBox;
     QScopedPointer<QQuickPageLayout> layout;