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

2 files changed, 9 insertions, 2 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 {
diff --git a/examples/declarative/ui-components/tabwidget/TabWidget.qml b/examples/declarative/ui-components/tabwidget/TabWidget.qml
index f066fd2..2a74c46 100644
--- a/examples/declarative/ui-components/tabwidget/TabWidget.qml
+++ b/examples/declarative/ui-components/tabwidget/TabWidget.qml
@@ -45,8 +45,8 @@ Item {
 
     // Setting the default property to stack.children means any child items
     // of the TabWidget are actually added to the 'stack' item's children.
-    // See the "Extending Types from QML" documentation for details on default
-    // properties.
+    // See the "Writing QML Components: Properties, Methods and Signals"
+    // documentation for details on default properties.
     default property alias content: stack.children
 
     property int current: 0