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Graph example 

Change-Id: I4a7b52f6e14182aed31354dc3860ef187e1899a4
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
This commit is contained in:
Gunnar Sletta 2013-06-11 20:47:54 +02:00 committed by The Qt Project
parent 6586505e6b
commit 76d8f8a5d3
18 changed files with 1201 additions and 0 deletions
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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Free Documentation License Usage
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of
** this file. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: http://www.gnu.org/copyleft/fdl.html.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\example scenegraph/graph
\title Scene Graph - Graph
\ingroup qtquickexamples
\brief Demonstrates how one can combine custom materials and geometries
under a single QQuickItem.
\image graph-example.jpg
*/

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "graph.h"
#include "noisynode.h"
#include "gridnode.h"
#include "linenode.h"
Graph::Graph()
: m_samplesChanged(false)
, m_geometryChanged(false)
{
setFlag(ItemHasContents, true);
}
void Graph::appendSample(qreal value)
{
m_samples << value;
m_samplesChanged = true;
update();
}
void Graph::removeFirstSample()
{
m_samples.removeFirst();
m_samplesChanged = true;
update();
}
void Graph::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
{
m_geometryChanged = true;
update();
QQuickItem::geometryChanged(newGeometry, oldGeometry);
}
class GraphNode : public QSGNode
{
public:
NoisyNode *background;
GridNode *grid;
LineNode *line;
LineNode *shadow;
};
QSGNode *Graph::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *)
{
GraphNode *n= static_cast<GraphNode *>(oldNode);
QRectF rect = boundingRect();
if (rect.isEmpty()) {
delete n;
return 0;
}
if (!n) {
n = new GraphNode();
n->background = new NoisyNode(window());
n->grid = new GridNode();
n->line = new LineNode(10, 0.5, QColor("steelblue"));
n->shadow = new LineNode(20, 0.2, QColor::fromRgbF(0.2, 0.2, 0.2, 0.4));
n->appendChildNode(n->background);
n->appendChildNode(n->grid);
n->appendChildNode(n->shadow);
n->appendChildNode(n->line);
}
if (m_geometryChanged) {
n->background->setRect(rect);
n->grid->setRect(rect);
}
if (m_geometryChanged || m_samplesChanged) {
n->line->updateGeometry(rect, m_samples);
// We don't need to calculate the geometry twice, so just steal it from the other one...
n->shadow->setGeometry(n->line->geometry());
}
m_geometryChanged = false;
m_samplesChanged = false;
return n;
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef GRAPH_H
#define GRAPH_H
#include <QQuickItem>
class Graph : public QQuickItem
{
Q_OBJECT
public:
Graph();
protected:
QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *);
void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry);
public slots:
void appendSample(qreal value);
void removeFirstSample();
private:
QList<qreal> m_samples;
bool m_samplesChanged;
bool m_geometryChanged;
};
#endif // GRAPH_H

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#-------------------------------------------------
#
# Project created by QtCreator 2013-06-11T13:13:18
#
#-------------------------------------------------
QT += core gui quick
TARGET = graph
TEMPLATE = app
SOURCES += main.cpp \
graph.cpp \
noisynode.cpp \
gridnode.cpp \
linenode.cpp
HEADERS += \
graph.h \
noisynode.h \
gridnode.h \
linenode.h
RESOURCES += \
graph.qrc
OTHER_FILES += \
main.qml \
shaders/noisy.vsh \
shaders/noisy.fsh \
shaders/line.fsh \
shaders/line.vsh

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<RCC>
<qresource prefix="/scenegraph/graph">
<file>main.qml</file>
<file>shaders/noisy.vsh</file>
<file>shaders/noisy.fsh</file>
<file>shaders/line.vsh</file>
<file>shaders/line.fsh</file>
</qresource>
</RCC>

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "gridnode.h"
#include "qmath.h"
#define GRID_SIZE 32
GridNode::GridNode()
: m_geometry(QSGGeometry::defaultAttributes_Point2D(), 0)
{
setGeometry(&m_geometry);
m_geometry.setDrawingMode(GL_LINES);
setMaterial(&m_material);
m_material.setColor(Qt::gray);
}
/*
* The function hardcodes a fixed set of grid lines and scales
* those to the bounding rect.
*/
void GridNode::setRect(const QRectF &rect)
{
int vCount = int((rect.width() - 1) / GRID_SIZE);
int hCount = int((rect.height() - 1) / GRID_SIZE);
int lineCount = vCount + hCount;
QSGGeometry *g = geometry();
g->allocate(lineCount * 2);
float x = rect.x();
float y = rect.y();
float w = rect.width();
float h = rect.height();
QSGGeometry::Point2D *v = g->vertexDataAsPoint2D();
// Then write the vertical lines
for (int i=0; i<vCount; ++i) {
float dx = (i + 1) * GRID_SIZE;
v[i*2].set(dx, y);
v[i*2+1].set(dx, y + h);
}
v += vCount * 2;
// Then write the horizontal lines
for (int i=0; i<hCount; ++i) {
float dy = (i + 1) * GRID_SIZE;
v[i*2].set(x, dy);
v[i*2+1].set(x + w, dy);
}
// Tell the scenegraph we updated the geometry..
markDirty(QSGNode::DirtyGeometry);
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef GRIDNODE_H
#define GRIDNODE_H
#include <QtQuick/QSGGeometryNode>
#include <QtQuick/QSGFlatColorMaterial>
class GridNode : public QSGGeometryNode
{
public:
GridNode();
void setRect(const QRectF &rect);
private:
QSGFlatColorMaterial m_material;
QSGGeometry m_geometry;
};
#endif // GRIDNODE_H

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "linenode.h"
#include <QtCore/QResource>
#include <QtGui/QColor>
#include <QtQuick/QSGSimpleMaterial>
struct LineMaterial
{
QColor color;
float spread;
float size;
};
class LineShader : public QSGSimpleMaterialShader<LineMaterial>
{
QSG_DECLARE_SIMPLE_SHADER(LineShader, LineMaterial)
public:
const char *vertexShader() const {
QResource r(":/scenegraph/graph/shaders/line.vsh");
Q_ASSERT(r.isValid());
return (const char *) r.data();
}
const char *fragmentShader() const {
QResource r(":/scenegraph/graph/shaders/line.fsh");
Q_ASSERT(r.isValid());
return (const char *) r.data();
}
QList<QByteArray> attributes() const { return QList<QByteArray>() << "pos" << "t"; }
void updateState(const LineMaterial *m, const LineMaterial *) {
program()->setUniformValue(id_color, m->color);
program()->setUniformValue(id_spread, m->spread);
program()->setUniformValue(id_size, m->size);
}
void resolveUniforms() {
id_spread = program()->uniformLocation("spread");
id_size = program()->uniformLocation("size");
id_color = program()->uniformLocation("color");
}
private:
int id_color;
int id_spread;
int id_size;
};
struct LineVertex {
float x;
float y;
float t;
inline void set(float xx, float yy, float tt) { x = xx; y = yy; t = tt; }
};
static const QSGGeometry::AttributeSet &attributes()
{
static QSGGeometry::Attribute attr[] = {
QSGGeometry::Attribute::create(0, 2, GL_FLOAT, true),
QSGGeometry::Attribute::create(1, 1, GL_FLOAT)
};
static QSGGeometry::AttributeSet set = { 2, 3 * sizeof(float), attr };
return set;
}
LineNode::LineNode(float size, float spread, const QColor &color)
: m_geometry(attributes(), 0)
{
setGeometry(&m_geometry);
m_geometry.setDrawingMode(GL_TRIANGLE_STRIP);
QSGSimpleMaterial<LineMaterial> *m = LineShader::createMaterial();
m->state()->color = color;
m->state()->size = size;
m->state()->spread = spread;
m->setFlag(QSGMaterial::Blending);
setMaterial(m);
setFlag(OwnsMaterial);
}
/*
* Assumes that samples have values in the range of 0 to 1 and scales them to
* the height of bounds. The samples are stretched out horizontally along the
* width of the bounds.
*
* The position of each pair of points is identical, but we use the third value
* "t" to shift the point up or down and to add antialiasing.
*/
void LineNode::updateGeometry(const QRectF &bounds, const QList<qreal> &samples)
{
m_geometry.allocate(samples.size() * 2);
float x = bounds.x();
float y = bounds.y();
float w = bounds.width();
float h = bounds.height();
float dx = w / (samples.size() - 1);
LineVertex *v = (LineVertex *) m_geometry.vertexData();
for (int i=0; i<samples.size(); ++i) {
v[i*2+0].set(x + dx * i, y + samples.at(i) * h, 0);
v[i*2+1].set(x + dx * i, y + samples.at(i) * h, 1);
}
markDirty(QSGNode::DirtyGeometry);
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef LINENODE_H
#define LINENODE_H
#include <QSGGeometryNode>
class LineNode : public QSGGeometryNode
{
public:
LineNode(float size, float spread, const QColor &color);
void updateGeometry(const QRectF &bounds, const QList<qreal> &samples);
private:
QSGGeometry m_geometry;
};
#endif // LINENODE_H

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QGuiApplication>
#include <QQuickView>
#include "graph.h"
#include <QtQml/QQmlContext>
int main(int argc, char *argv[])
{
QGuiApplication a(argc, argv);
qmlRegisterType<Graph>("Graph", 1, 0, "Graph");
QQuickView view;
view.resize(800, 400);
view.setResizeMode(QQuickView::SizeRootObjectToView);
view.setSource(QUrl("qrc:///scenegraph/graph/main.qml"));
view.show();
return a.exec();
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.0
import Graph 1.0
Item {
width: 800
height: 400
Graph {
id: graph
anchors.fill: parent
anchors.margins: 100
function newSample(i) {
return (Math.sin(i / 100.0 * Math.PI * 2) + 1) * 0.4 + Math.random() * 0.05;
}
Component.onCompleted: {
for (var i=0; i<100; ++i)
appendSample(newSample(i));
}
property int offset: 100;
}
Timer {
id: timer
interval: 500
repeat: true
running: true
onTriggered: {
graph.removeFirstSample();
graph.appendSample(graph.newSample(++graph.offset));
}
}
Rectangle {
anchors.fill: graph
color: "transparent"
border.color: "black"
border.width: 2
}
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "noisynode.h"
#include <QtCore/QResource>
#include <QtQuick/QSGSimpleMaterialShader>
#include <QtQuick/QSGTexture>
#include <QtQuick/QQuickWindow>
#define NOISE_SIZE 64
struct NoisyMaterial
{
~NoisyMaterial() {
delete texture;
}
QColor color;
QSGTexture *texture;
};
class NoisyShader : public QSGSimpleMaterialShader<NoisyMaterial>
{
QSG_DECLARE_SIMPLE_SHADER(NoisyShader, NoisyMaterial)
public:
const char *vertexShader() const {
QResource r(":/scenegraph/graph/shaders/noisy.vsh");
Q_ASSERT(r.isValid());
return (const char *) r.data();
}
const char *fragmentShader() const {
QResource r(":/scenegraph/graph/shaders/noisy.fsh");
Q_ASSERT(r.isValid());
return (const char *) r.data();
}
QList<QByteArray> attributes() const { return QList<QByteArray>() << "aVertex" << "aTexCoord"; }
void updateState(const NoisyMaterial *m, const NoisyMaterial *) {
// Set the color
program()->setUniformValue(id_color, m->color);
// Bind the texture and set program to use texture unit 0 (the default)
m->texture->bind();
// Then set the texture size so we can adjust the texture coordinates accordingly in the
// vertex shader..
QSize s = m->texture->textureSize();
program()->setUniformValue(id_textureSize, QSizeF(1.0 / s.width(), 1.0 / s.height()));
}
void resolveUniforms() {
id_texture = program()->uniformLocation("texture");
id_textureSize = program()->uniformLocation("textureSize");
id_color = program()->uniformLocation("color");
// We will only use texture unit 0, so set it only once.
program()->setUniformValue(id_texture, 0);
}
private:
int id_color;
int id_texture;
int id_textureSize;
};
NoisyNode::NoisyNode(QQuickWindow *window)
{
// Make some noise...
QImage image(NOISE_SIZE, NOISE_SIZE, QImage::Format_RGB32);
uint *data = (uint *) image.bits();
for (int i=0; i<NOISE_SIZE * NOISE_SIZE; ++i) {
uint g = rand() & 0xff;
data[i] = 0xff000000 | (g << 16) | (g << 8) | g;
}
QSGTexture *t = window->createTextureFromImage(image);
t->setFiltering(QSGTexture::Nearest);
t->setHorizontalWrapMode(QSGTexture::Repeat);
t->setVerticalWrapMode(QSGTexture::Repeat);
QSGSimpleMaterial<NoisyMaterial> *m = NoisyShader::createMaterial();
m->state()->texture = t;
m->state()->color = QColor::fromRgbF(0.95, 0.95, 0.97);
m->setFlag(QSGMaterial::Blending);
setMaterial(m);
setFlag(OwnsMaterial, true);
QSGGeometry *g = new QSGGeometry(QSGGeometry::defaultAttributes_TexturedPoint2D(), 4);
QSGGeometry::updateTexturedRectGeometry(g, QRect(), QRect());
setGeometry(g);
setFlag(OwnsGeometry, true);
}
void NoisyNode::setRect(const QRectF &bounds)
{
QSGGeometry::updateTexturedRectGeometry(geometry(), bounds, QRectF(0, 0, 1, 1));
markDirty(QSGNode::DirtyGeometry);
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef NOISYNODE_H
#define NOISYNODE_H
#include <QSGGeometryNode>
class QQuickWindow;
class NoisyNode : public QSGGeometryNode
{
public:
NoisyNode(QQuickWindow *window);
void setRect(const QRectF &bounds);
};
#endif // NOISYNODE_H

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
uniform lowp vec4 color;
uniform lowp float qt_Opacity;
uniform lowp float spread;
varying lowp float vT;
#define PI 3.14159265359
void main(void)
{
lowp float tt = smoothstep(spread, 1.0, sin(vT * PI));
gl_FragColor = color * qt_Opacity * tt;
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
attribute highp vec4 pos;
attribute highp float t;
uniform lowp float size;
uniform highp mat4 qt_Matrix;
varying lowp float vT;
void main(void)
{
vec4 adjustedPos = pos;
adjustedPos.y += (t * size);
gl_Position = qt_Matrix * adjustedPos;
vT = t;
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
uniform sampler2D texture;
uniform lowp float qt_Opacity;
uniform lowp vec4 color;
varying highp vec2 vTexCoord;
varying lowp vec2 vShadeCoord;
#define PI 3.14159265359
void main()
{
lowp float shade = texture2D(texture, vTexCoord).r * 0.05 - length(vec2(0.5, 0.4) - vShadeCoord) * 0.3;
lowp vec4 c = vec4(color.xyz + shade, color.w);
gl_FragColor = c * qt_Opacity;
}

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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
attribute highp vec4 aVertex;
attribute highp vec2 aTexCoord;
uniform highp mat4 qt_Matrix;
uniform highp vec2 textureSize;
varying highp vec2 vTexCoord;
varying lowp vec2 vShadeCoord;
void main() {
gl_Position = qt_Matrix * aVertex;
vTexCoord = aVertex.xy * textureSize;
vShadeCoord = aTexCoord;
}