TextEditor: Add modified handling

Add a modified property to the document and add
handling in onClosing(). Connect the actions to
call close() instead of Qt.quit() for it to
become active.

Change-Id: I0fec75629db64e91508ed8ba45d4fb60be146b1b
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

1 files changed, 17 insertions, 2 deletions

diff --git a/examples/quickcontrols2/texteditor/qml/texteditor.qml b/examples/quickcontrols2/texteditor/qml/texteditor.qml
index a1cb3435..6c95335b 100644
--- a/examples/quickcontrols2/texteditor/qml/texteditor.qml
+++ b/examples/quickcontrols2/texteditor/qml/texteditor.qml
@@ -80,7 +80,7 @@ ApplicationWindow {
     }
     Shortcut {
         sequence: StandardKey.Quit
-        onActivated: Qt.quit()
+        onActivated: close()
     }
     Shortcut {
         sequence: StandardKey.Copy
@@ -121,7 +121,7 @@ ApplicationWindow {
             }
             MenuItem {
                 text: qsTr("&Quit")
-                onTriggered: Qt.quit()
+                onTriggered: close()
             }
         }
 
@@ -205,6 +205,14 @@ ApplicationWindow {
         id: errorDialog
     }
 
+    MessageDialog {
+        id : quitDialog
+        title: qsTr("Quit?")
+        text: qsTr("The file has been modified. Quit anyway?")
+        buttons: (MessageDialog.Yes | MessageDialog.No)
+        onYesClicked: Qt.quit()
+    }
+
     header: ToolBar {
         leftPadding: 8
 
@@ -449,4 +457,11 @@ ApplicationWindow {
             onTriggered: colorDialog.open()
         }
     }
+
+    onClosing: {
+        if (document.modified) {
+            quitDialog.open()
+            close.accepted = false
+        }
+    }
 }