Additional ListView section header placement options

Add a section.labelPositioning property which can be a combination
of:

- ViewSection.InlineLabels - section labels are shown inline between
  the item delegates separating sections (default).
- ViewSection.CurrentLabelAtStart - the current section label sticks to
  the start of the view as it is moved.
- ViewSection.NextLabelAtEnd - the next section label (beyond all visible
  sections) sticks to the end of the view as it is moved.

Task-number: QTBUG-12880
Change-Id: I4601828337412bd3a83769c9b8df3f6d4d7474b8
Reviewed-on: http://codereview.qt-project.org/5192
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Bea Lam <bea.lam@nokia.com>

2 files changed, 65 insertions, 7 deletions

diff --git a/examples/declarative/modelviews/listview/content/ToggleButton.qml b/examples/declarative/modelviews/listview/content/ToggleButton.qml
new file mode 100644
index 0000000000..2d8221e915
--- /dev/null
+++ b/examples/declarative/modelviews/listview/content/ToggleButton.qml
@@ -0,0 +1,18 @@
+import QtQuick 2.0
+
+Rectangle {
+    id: root
+    property alias label: text.text
+    property bool active: false
+    signal toggled
+    width: 149
+    height: 30
+    radius: 3
+    color: active ? "green" : "lightgray"
+    border.width: 1
+    Text { id: text; anchors.centerIn: parent; font.pixelSize: 14 }
+    MouseArea {
+        anchors.fill: parent
+        onClicked: { active = !active; root.toggled() }
+    }
+}
diff --git a/examples/declarative/modelviews/listview/sections.qml b/examples/declarative/modelviews/listview/sections.qml
index 09e58be5d6..4496567377 100644
--- a/examples/declarative/modelviews/listview/sections.qml
+++ b/examples/declarative/modelviews/listview/sections.qml
@@ -42,22 +42,33 @@
 // the ListView.section attached property.
 
 import QtQuick 2.0
+import "content"
 
-//! [0]
 Rectangle {
     id: container
-    width: 200
-    height: 250
+    width: 300
+    height: 360
 
     ListModel {
         id: animalsModel
+        ListElement { name: "Ant"; size: "Tiny" }
+        ListElement { name: "Flea"; size: "Tiny" }
         ListElement { name: "Parrot"; size: "Small" }
         ListElement { name: "Guinea pig"; size: "Small" }
+        ListElement { name: "Rat"; size: "Small" }
+        ListElement { name: "Butterfly"; size: "Small" }
         ListElement { name: "Dog"; size: "Medium" }
         ListElement { name: "Cat"; size: "Medium" }
-        ListElement { name: "Elephant"; size: "Large" }
+        ListElement { name: "Pony"; size: "Medium" }
+        ListElement { name: "Koala"; size: "Medium" }
+        ListElement { name: "Horse"; size: "Large" }
+        ListElement { name: "Tiger"; size: "Large" }
+        ListElement { name: "Giraffe"; size: "Large" }
+        ListElement { name: "Elephant"; size: "Huge" }
+        ListElement { name: "Whale"; size: "Huge" }
     }
 
+//! [0]
     // The delegate for each section header
     Component { 
         id: sectionHeading
@@ -69,19 +80,48 @@ Rectangle {
             Text {
                 text: section
                 font.bold: true
+                font.pixelSize: 20
             }
         }
     }
 
     ListView {
-        anchors.fill: parent
+        id: view
+        anchors.top: parent.top
+        anchors.bottom: buttonBar.top
+        width: parent.width
         model: animalsModel
-        delegate: Text { text: name }
+        delegate: Text { text: name; font.pixelSize: 18 }
 
         section.property: "size"
         section.criteria: ViewSection.FullString
         section.delegate: sectionHeading
     }
-}
 //! [0]
 
+    Row {
+        id: buttonBar
+        anchors.bottom: parent.bottom
+        anchors.bottomMargin: 1
+        spacing: 1
+        ToggleButton {
+            label: "CurrentLabelAtStart"
+            onToggled: {
+                if (active)
+                    view.section.labelPositioning |= ViewSection.CurrentLabelAtStart
+                else
+                    view.section.labelPositioning &= ~ViewSection.CurrentLabelAtStart
+            }
+        }
+        ToggleButton {
+            label: "NextLabelAtEnd"
+            onToggled: {
+                if (active)
+                    view.section.labelPositioning |= ViewSection.NextLabelAtEnd
+                else
+                    view.section.labelPositioning &= ~ViewSection.NextLabelAtEnd
+            }
+        }
+    }
+}
+