Add 'Writing New Components' docs, and document the connect() function.

The 'Writing QML Components' is mainly a restructuring of the
'Extending types from QML' page. It also documents the signal
connect() function that was previously undocumented.

Task-number: QTBUG-15718, QTBUG-15138

1 files changed, 7 insertions, 0 deletions

diff --git a/examples/declarative/modelviews/visualitemmodel/visualitemmodel.qml b/examples/declarative/modelviews/visualitemmodel/visualitemmodel.qml
index 15f2f11..f6564f7 100644
--- a/examples/declarative/modelviews/visualitemmodel/visualitemmodel.qml
+++ b/examples/declarative/modelviews/visualitemmodel/visualitemmodel.qml
@@ -55,16 +55,22 @@ Rectangle {
             width: view.width; height: view.height
             color: "#FFFEF0"
             Text { text: "Page 1"; font.bold: true; anchors.centerIn: parent }
+
+            Component.onDestruction: print("destroyed 1")
         }
         Rectangle {
             width: view.width; height: view.height
             color: "#F0FFF7"
             Text { text: "Page 2"; font.bold: true; anchors.centerIn: parent }
+
+            Component.onDestruction: print("destroyed 2")
         }
         Rectangle {
             width: view.width; height: view.height
             color: "#F4F0FF"
             Text { text: "Page 3"; font.bold: true; anchors.centerIn: parent }
+
+            Component.onDestruction: print("destroyed 3")
         }
     }
 
@@ -76,6 +82,7 @@ Rectangle {
         highlightRangeMode: ListView.StrictlyEnforceRange
         orientation: ListView.Horizontal
         snapMode: ListView.SnapOneItem; flickDeceleration: 2000
+        cacheBuffer: 200
     }
 
     Rectangle {