TreeView: Add rootIndex property

Its purpose is the same as QAbstractItemView::rootIndex
and allows to display only the part of the model data that
is descendant of this index.

The filesystembrowser example has been updated to only show
files reachable from the user's home directory.

[ChangeLog][TreeView] Added rootIndex property

Change-Id: Ib8d9af4ce9d1f341ab509de3cc991773830ba9f4
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Mitch Curtis <mitch.curtis@theqtcompany.com>

2 files changed, 5 insertions, 2 deletions

diff --git a/examples/quick/controls/filesystembrowser/main.cpp b/examples/quick/controls/filesystembrowser/main.cpp
index 176d334c4..1322bc497 100644
--- a/examples/quick/controls/filesystembrowser/main.cpp
+++ b/examples/quick/controls/filesystembrowser/main.cpp
@@ -137,6 +137,7 @@ int main(int argc, char *argv[])
     fsm->setRootPath(QDir::homePath());
     fsm->setResolveSymlinks(true);
     engine.rootContext()->setContextProperty("fileSystemModel", fsm);
+    engine.rootContext()->setContextProperty("rootPathIndex", fsm->index(fsm->rootPath()));
     engine.load(QUrl(QStringLiteral("qrc:///main.qml")));
 
     return app.exec();
diff --git a/examples/quick/controls/filesystembrowser/main.qml b/examples/quick/controls/filesystembrowser/main.qml
index abc3c20cd..b85002d5e 100644
--- a/examples/quick/controls/filesystembrowser/main.qml
+++ b/examples/quick/controls/filesystembrowser/main.qml
@@ -39,7 +39,7 @@
 ****************************************************************************/
 
 import QtQuick 2.2
-import QtQuick.Controls 1.4
+import QtQuick.Controls 1.5
 import QtQml.Models 2.2
 
 ApplicationWindow {
@@ -90,6 +90,7 @@ ApplicationWindow {
         anchors.fill: parent
         anchors.margins: 2 * 12 + row.height
         model: fileSystemModel
+        rootIndex: rootPathIndex
         selection: sel
 
         TableViewColumn {
@@ -103,12 +104,14 @@ ApplicationWindow {
             role: "size"
             resizable: true
             horizontalAlignment : Text.AlignRight
+            width: 70
         }
 
         TableViewColumn {
             title: "Permissions"
             role: "displayableFilePermissions"
             resizable: true
+            width: 100
         }
 
         TableViewColumn {
@@ -117,7 +120,6 @@ ApplicationWindow {
             resizable: true
         }
 
-        onDoubleClicked: isExpanded(index) ? collapse(index) : expand(index)
         onActivated : Qt.openUrlExternally(fileSystemModel.data(index, 263))
     }
 }