Allow MouseArea dragging to filter mouse events from descendants

This allows dragging a MouseArea that contains a clickable MouseArea,
for example.

Task-number: QTBUG-12323
Reviewed-by: Michael Brasser

1 files changed, 72 insertions, 0 deletions

diff --git a/doc/src/snippets/declarative/mouseareadragfilter.qml b/doc/src/snippets/declarative/mouseareadragfilter.qml
new file mode 100644
index 0000000..52ed10c
--- /dev/null
+++ b/doc/src/snippets/declarative/mouseareadragfilter.qml
@@ -0,0 +1,72 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//! [dragfilter]
+import Qt 4.7
+
+Rectangle {
+    width: 480
+    height: 320
+    Rectangle {
+        x: 30; y: 30
+        width: 300; height: 240
+        color: "lightsteelblue"
+
+        MouseArea {
+            anchors.fill: parent
+            drag.target: parent;
+            drag.axis: "XAxis"
+            drag.minimumX: 30
+            drag.maximumX: 150
+            drag.filterChildren: true
+
+            Rectangle {
+                color: "yellow"
+                x: 50; y : 50
+                width: 100; height: 100
+                MouseArea {
+                    anchors.fill: parent
+                    onClicked: console.log("Clicked")
+                }
+            }
+        }
+    }
+}
+//! [dragfilter]