Add missing QQuickDialog::standardButton() invokable method

[ChangeLog][Controls][Dialog] Added a standardButton() method for
accessing the standard buttons in the dialog's button box.

Change-Id: I7a92a0176985e1bc2c1a82f4bc9e78b813eee802
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

1 files changed, 16 insertions, 0 deletions

diff --git a/src/quicktemplates2/qquickdialog.cpp b/src/quicktemplates2/qquickdialog.cpp
index 00719ae4..eb7b658e 100644
--- a/src/quicktemplates2/qquickdialog.cpp
+++ b/src/quicktemplates2/qquickdialog.cpp
@@ -302,6 +302,22 @@ void QQuickDialog::setStandardButtons(QPlatformDialogHelper::StandardButtons but
 
 /*!
     \since QtQuick.Controls 2.3
+    \qmlmethod AbstractButton QtQuick.Controls::Dialog::standardButton(StandardButton button)
+
+    Returns the specified standard \a button, or \c null if it does not exist.
+
+    \sa standardButtons
+*/
+QQuickAbstractButton *QQuickDialog::standardButton(QPlatformDialogHelper::StandardButton button) const
+{
+    Q_D(const QQuickDialog);
+    if (!d->buttonBox)
+        return nullptr;
+    return d->buttonBox->standardButton(button);
+}
+
+/*!
+    \since QtQuick.Controls 2.3
     \qmlproperty int QtQuick.Controls::Dialog::result
 
     This property holds the result code.