Qml perf data generation on cpp

Change-Id: If770c96ff84e49a747c4355e56bff002556cd659
Reviewed-by: Mika Salmela <mika.salmela@theqtcompany.com>

tests/qmlperf/datagenerator.cpp

@@ -0,0 +1,67 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Digia Plc
+** All rights reserved.
+** For any questions to Digia, please use contact form at http://qt.digia.com
+**
+** This file is part of the QtDataVisualization module.
+**
+** Licensees holding valid Qt Enterprise licenses may use this file in
+** accordance with the Qt Enterprise License Agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.
+**
+** If you have questions regarding the use of this file, please use
+** contact form at http://qt.digia.com
+**
+****************************************************************************/
+
+#include "datagenerator.h"
+#include <QDebug>
+
+using namespace QtDataVisualization;
+
+Q_DECLARE_METATYPE(QScatter3DSeries *)
+
+DataGenerator::DataGenerator(QObject *parent) :
+    QObject(parent)
+{
+    qRegisterMetaType<QScatter3DSeries *>();
+}
+
+DataGenerator::~DataGenerator()
+{
+    qDebug() << __FUNCTION__;
+}
+
+void DataGenerator::generateData(QScatter3DSeries *series, uint count)
+{
+    QScatterDataArray *dataArray = new QScatterDataArray;
+    dataArray->resize(count);
+    QScatterDataItem *ptrToDataArray = &dataArray->first();
+
+    float rand_max = float(RAND_MAX);
+    for (uint i = 0; i < count; i++) {
+            ptrToDataArray->setPosition(QVector3D(float(qrand()) / rand_max,
+                                                  float(qrand()) / rand_max,
+                                                  float(qrand()) / rand_max));
+            ptrToDataArray++;
+    }
+
+    series->dataProxy()->resetArray(dataArray);
+}
+
+void DataGenerator::add(QScatter3DSeries *series, uint count)
+{
+    QScatterDataArray appendArray;
+    appendArray.resize(count);
+
+    float rand_max = float(RAND_MAX);
+    for (uint i = 0; i < count; i++) {
+            appendArray[i].setPosition(QVector3D(float(qrand()) / rand_max,
+                                                 float(qrand()) / rand_max,
+                                                 float(qrand()) / rand_max));
+    }
+
+    series->dataProxy()->addItems(appendArray);
+}

tests/qmlperf/datagenerator.h

@@ -16,18 +16,26 @@
 **
 ****************************************************************************/
 
-//function createData(base) {
-//    for (var z = 0; z < 30; z++) {
-//        for (var x = 0; x < 30; x++) {
-//            var angle = (((z - 16) * (x - 16)) / 144.0) * 1.57;
-//            var y = Math.sin(angle + base);
-//            dataModel.append({"z": z, "x": x, "y": y});
-//        }
-//    }
-//}
+#ifndef DATAGENERATOR_H
+#define DATAGENERATOR_H
 
-function createData(base) {
-    for (var i = 0; i < base; i++) {
-        dataModel.append({"z": Math.random(), "x": Math.random(), "y": Math.random()});
-    }
-}
+#include <QtDataVisualization/QScatter3DSeries>
+
+using namespace QtDataVisualization;
+
+class DataGenerator  : public QObject
+{
+    Q_OBJECT
+public:
+    DataGenerator(QObject *parent = 0);
+    virtual ~DataGenerator();
+
+public slots:
+    void generateData(QScatter3DSeries *series, uint count);
+    void add(QScatter3DSeries *series, uint count);
+
+private:
+    QScatter3DSeries m_series;
+};
+
+#endif // DATAGENERATOR_H

tests/qmlperf/main.cpp

@@ -16,8 +16,11 @@
 **
 ****************************************************************************/
 
+#include "datagenerator.h"
+
 #include <QtGui/QGuiApplication>
 #include <QtCore/QDir>
+#include <QtQml/QQmlContext>
 #include <QtQuick/QQuickView>
 #include <QtQml/QQmlEngine>
 
@@ -38,6 +41,9 @@ int main(int argc, char *argv[])
                                       QString::fromLatin1("qml")));
     QObject::connect(viewer.engine(), &QQmlEngine::quit, &viewer, &QWindow::close);
 
+    DataGenerator dataGenerator;
+    viewer.rootContext()->setContextProperty("dataGenerator", &dataGenerator);
+
     viewer.setTitle(QStringLiteral("QML Performance"));
     viewer.setSource(QUrl("qrc:/qml/qmlperf/main.qml"));
     viewer.setResizeMode(QQuickView::SizeRootObjectToView);

tests/qmlperf/qml/qmlperf/main.qml

@@ -20,7 +20,6 @@ import QtQuick 2.1
 import QtQuick.Layouts 1.0
 import QtQuick.Controls 1.0
 import QtDataVisualization 1.1
-import "script.js" as Script
 import "."
 
 Rectangle {
@@ -29,7 +28,7 @@ Rectangle {
     height: 1024
 
     property var itemCount: 1000.0
-    property var addItems: 1000.0
+    property var addItems: 500.0
 
     Button {
         id: changeButton
@@ -90,7 +89,7 @@ Rectangle {
         text: "Add"
         onClicked: {
             itemCount = itemCount + addItems;
-            Script.createData(addItems);
+            dataGenerator.add(scatterSeries, addItems);
         }
     }
 
@@ -102,11 +101,6 @@ Rectangle {
         anchors.left: mainview.left
         state: "meshsphere"
 
-        ListModel {
-            id: dataModel
-            Component.onCompleted: Script.createData(itemCount)
-        }
-
         Scatter3D {
             id: scatterPlot
             width: graphView.width
@@ -134,13 +128,9 @@ Rectangle {
             Scatter3DSeries {
                 id: scatterSeries
                 mesh: Abstract3DSeries.MeshSphere
-                ItemModelScatterDataProxy {
-                    itemModel: dataModel
-                    xPosRole: "x"
-                    yPosRole: "y"
-                    zPosRole: "z"
-                }
             }
+
+            Component.onCompleted: dataGenerator.generateData(scatterSeries, itemCount);
         }
 
         states: [

tests/qmlperf/qmlperf.pro

@@ -3,10 +3,14 @@
 }
 
 # The .cpp file which was generated for your project. Feel free to hack it.
-SOURCES += main.cpp
+SOURCES += main.cpp \
+    datagenerator.cpp
 
 RESOURCES += qmlperf.qrc
 
 OTHER_FILES += doc/src/* \
                doc/images/* \
                qml/qmlperf/*
+
+HEADERS += \
+    datagenerator.h

tests/qmlperf/qmlperf.qrc

@@ -1,6 +1,5 @@
 <RCC>
     <qresource prefix="/">
         <file>qml/qmlperf/main.qml</file>
-        <file>qml/qmlperf/script.js</file>
     </qresource>
 </RCC>