Initial ImageParticle sharing

This allows particles rendered by ImageParticle to share some of their
randomly generated state. Still to come are reset methods and animData
sharing (so animations can look synced)

Change-Id: Ia805e1b3735b15fba7bd14778ed7abd795b11f06
Reviewed-on: http://codereview.qt-project.org/5114
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Martin Jones <martin.jones@nokia.com>

2 files changed, 199 insertions, 0 deletions

diff --git a/examples/declarative/particles/imageparticle/sharing.qml b/examples/declarative/particles/imageparticle/sharing.qml
new file mode 100644
index 0000000000..621f672430
--- /dev/null
+++ b/examples/declarative/particles/imageparticle/sharing.qml
@@ -0,0 +1,199 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples 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."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// This example shows how to create your own highlight delegate for a ListView
+// that uses a SpringAnimation to provide custom movement when the
+// highlight bar is moved between items.
+
+import QtQuick 2.0
+import QtQuick.Particles 2.0
+
+Rectangle {
+    property real delegateHeight: 65
+    width: 200; height: 300
+    gradient: Gradient {
+        GradientStop { position: 0.0; color: "#EEEEFF" }
+        GradientStop { position: 1.0; color: "lightblue" }
+    }
+
+    // Define a delegate component.  A component will be
+    // instantiated for each visible item in the list.
+    Component {
+        id: petDelegate
+        Item {
+            id: wrapper
+            width: 200; height: delegateHeight
+            z: 10
+            Column {
+                Text {color: "white"; text: name; font.pixelSize: 18 }
+                Text {color: "white"; text: 'Type: ' + type; font.pixelSize: 14 }
+                Text {color: "white"; text: 'Age: ' + age; font.pixelSize: 14 }
+            }
+            // indent the item if it is the current item
+            states: State {
+                name: "Current"
+                when: wrapper.ListView.isCurrentItem
+                PropertyChanges { target: wrapper; x: 20 }
+            }
+            transitions: Transition {
+                NumberAnimation { properties: "x"; duration: 200 }
+            }
+        }
+    }
+
+    // Define a highlight with customised movement between items.
+    Component {
+        id: highlightBar
+        Rectangle {
+            z: 0
+            width: 200; height: delegateHeight
+            gradient: Gradient {
+                GradientStop { position: 0.0; color: "#99FF99" }
+                GradientStop { position: 1.0; color: "#88FF88" }
+            }
+            y: listView.currentItem.y;
+            Behavior on y { SpringAnimation { spring: 2; damping: 0.2 } }
+            ImageParticle {
+                anchors.fill: parent
+                system: particles
+                source: "../images/flower.png"
+                color: "red"
+                clip: true
+                alpha: 1.0
+            }
+        }
+    }
+    ListView {
+        id: listView
+        width: 200; height: parent.height
+
+        model: petsModel
+        delegate: petDelegate
+        focus: true
+
+        // Set the highlight delegate. Note we must also set highlightFollowsCurrentItem
+        // to false so the highlight delegate can control how the highlight is moved.
+        highlight: highlightBar
+        highlightFollowsCurrentItem: false
+
+        ParticleSystem { id: particles }
+        Emitter {
+            system: particles
+            anchors.fill: parent
+            emitRate: 1
+            lifeSpan: 10000
+            size: 24
+            sizeVariation: 8
+            speed: AngleDirection{ angleVariation: 360; magnitude: 3 }
+            maximumEmitted: 10
+            startTime: 5000
+        }
+
+        ImageParticle {
+            anchors.fill: parent
+            system: particles
+            source: "../images/flower.png"
+            alpha: 0.1
+            color: "white"
+            opacityTable: "opacity.png"
+            rotationVariation: 180
+            z: -1
+        }
+    }
+
+    ListModel {
+        id: petsModel
+        ListElement {
+            name: "Polly"
+            type: "Parrot"
+            age: 12
+            size: "Small"
+        }
+        ListElement {
+            name: "Penny"
+            type: "Turtle"
+            age: 4
+            size: "Small"
+        }
+        ListElement {
+            name: "Warren"
+            type: "Rabbit"
+            age: 2
+            size: "Small"
+        }
+        ListElement {
+            name: "Spot"
+            type: "Dog"
+            age: 9
+            size: "Medium"
+        }
+        ListElement {
+            name: "Schrödinger"
+            type: "Cat"
+            age: 2
+            size: "Medium"
+        }
+        ListElement {
+            name: "Joey"
+            type: "Kangaroo"
+            age: 1
+            size: "Medium"
+        }
+        ListElement {
+            name: "Kimba"
+            type: "Bunny"
+            age: 65
+            size: "Large"
+        }
+        ListElement {
+            name: "Rover"
+            type: "Dog"
+            age: 5
+            size: "Large"
+        }
+        ListElement {
+            name: "Tiny"
+            type: "Elephant"
+            age: 15
+            size: "Large"
+        }
+    }
+
+}
diff --git a/examples/declarative/particles/images/flower.png b/examples/declarative/particles/images/flower.png
new file mode 100644
index 0000000000..b5c606210e
--- /dev/null
+++ b/examples/declarative/particles/images/flower.png