datasource.cpp
89 lines
| 2.5 KiB
| text/x-c
|
CppLexer
|
r2488 | /**************************************************************************** | ||
** | ||||
** Copyright (C) 2013 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 Qt Commercial Charts Add-on. | ||||
** | ||||
** $QT_BEGIN_LICENSE$ | ||||
** Licensees holding valid Qt Commercial licenses may use this file in | ||||
** accordance with the Qt Commercial 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 | ||||
** $QT_END_LICENSE$ | ||||
** | ||||
****************************************************************************/ | ||||
#include "datasource.h" | ||||
#include <QXYSeries> | ||||
#include <QAreaSeries> | ||||
#include <QtQuick/QQuickView> | ||||
#include <QtQuick/QQuickItem> | ||||
#include <QDebug> | ||||
#include <cmath> | ||||
QTCOMMERCIALCHART_USE_NAMESPACE | ||||
Q_DECLARE_METATYPE(QAbstractSeries *) | ||||
DataSource::DataSource(QQuickView *appViewer, QObject *parent) : | ||||
QObject(parent), | ||||
m_appViewer(appViewer), | ||||
m_index(-1) | ||||
{ | ||||
qRegisterMetaType<QAbstractSeries*>(); | ||||
generateData(0, 5, 1024); | ||||
} | ||||
void DataSource::update(QAbstractSeries *series) | ||||
{ | ||||
|
r2526 | if (series) { | ||
QXYSeries *xySeries = static_cast<QXYSeries *>(series); | ||||
m_index++; | ||||
if (m_index > m_data.count() - 1) | ||||
m_index = 0; | ||||
|
r2488 | |||
|
r2526 | QList<QPointF> points = m_data.at(m_index); | ||
// Use replace instead of clear + append, it's optimized for performance | ||||
xySeries->replace(points); | ||||
} | ||||
|
r2488 | } | ||
void DataSource::generateData(int type, int rowCount, int colCount) | ||||
{ | ||||
// Remove previous data | ||||
foreach (QList<QPointF> row, m_data) | ||||
row.clear(); | ||||
m_data.clear(); | ||||
// Append the new data depending on the type | ||||
for (int i(0); i < rowCount; i++) { | ||||
QList<QPointF> points; | ||||
for (int j(0); j < colCount; j++) { | ||||
qreal x(0); | ||||
qreal y(0); | ||||
switch (type) { | ||||
case 0: | ||||
// data with sin + random component | ||||
y = sin(3.14159265358979 / 50 * j) + 0.5 + (qreal) rand() / (qreal) RAND_MAX; | ||||
x = j; | ||||
break; | ||||
case 1: | ||||
// linear data | ||||
x = j; | ||||
y = (qreal) i / 10; | ||||
break; | ||||
default: | ||||
// unknown, do nothing | ||||
break; | ||||
} | ||||
points.append(QPointF(x, y)); | ||||
} | ||||
m_data.append(points); | ||||
} | ||||
} | ||||