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/****************************************************************************
**
** 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 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 "rainfallchart.h"
#include <QtDataVisualization/q3dcategoryaxis.h>
#include <QtDataVisualization/q3dvalueaxis.h>
#include <QGuiApplication>
#include <QFont>
#include <QDebug>
#include <QTextStream>
#include <QFile>
using namespace QtDataVisualization;
RainfallChart::RainfallChart(Q3DBars *rainfall)
: m_chart(rainfall)
{
// In data file the months are in numeric format, so create custom list
for (int i = 1; i <= 12; i++)
m_numericMonths << QString::number(i);
m_columnCount = m_numericMonths.size();
m_proxy = new VariantBarDataProxy;
m_chart->setActiveDataProxy(m_proxy);
updateYearsList(2000, 2012);
// Set up bar specifications; make the bars as wide as they are deep,
// and add a small space between the bars
m_chart->setBarSpecs(1.0, QSizeF(0.2, 0.2), true);
// Set axis labels and titles
QStringList months;
months << "January" << "February" << "March" << "April" << "May" << "June" << "July" << "August" << "September" << "October" << "November" << "December";
m_chart->rowAxis()->setTitle("Year");
m_chart->columnAxis()->setTitle("Month");
m_chart->valueAxis()->setTitle("rainfall");
m_chart->valueAxis()->setLabelFormat("%d mm");
m_chart->rowAxis()->setCategoryLabels(m_years);
m_chart->columnAxis()->setCategoryLabels(months);
// Set bar type to cylinder
m_chart->setBarType(QDataVis::Cylinders, false);
// Set shadows to medium
m_chart->setShadowQuality(QDataVis::ShadowMedium);
// Set font
m_chart->setFont(QFont("Century Gothic", 30));
// Set selection mode to bar and column
m_chart->setSelectionMode(QDataVis::ModeSliceColumn);
// Set theme
m_chart->setTheme(QDataVis::ThemeBlueNcs);
// Set preset camera position
m_chart->setCameraPreset(QDataVis::PresetIsometricRightHigh);
// Disable grid
m_chart->setGridVisible(false);
// Set window title
m_chart->setTitle(QStringLiteral("Monthly rainfall in Northern Finland"));
}
RainfallChart::~RainfallChart()
{
delete m_mapping;
delete m_dataSet;
delete m_chart;
}
void RainfallChart::start()
{
addDataSet();
}
void RainfallChart::updateYearsList(int start, int end)
{
m_years.clear();
for (int i = start; i <= end; i++)
m_years << QString::number(i);
m_rowCount = m_years.size();
// Set up sample space; make it match actual resolved data size
m_chart->setDataWindow(m_rowCount, m_columnCount);
}
void RainfallChart::addDataSet()
{
m_dataSet = new VariantDataSet;
VariantDataItemList *itemList = new VariantDataItemList;
QTextStream stream;
QFile dataFile(":/data/raindata.txt");
if (dataFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
stream.setDevice(&dataFile);
while (!stream.atEnd()) {
QString line = stream.readLine();
if (line.startsWith("#"))
continue;
QStringList strList = line.split(",", QString::SkipEmptyParts);
if (strList.size() < 3) {
qWarning() << "Invalid row read from data:" << line;
continue;
}
VariantDataItem *newItem = new VariantDataItem;
for (int i = 0; i < 2; i++)
newItem->append(strList.at(i).trimmed());
newItem->append(strList.at(2).trimmed().toDouble());
itemList->append(newItem);
}
} else {
qWarning() << "Unable to open data file:" << dataFile.fileName();
}
m_dataSet->addItems(itemList);
m_proxy->setDataSet(m_dataSet);
m_mapping = new VariantBarDataMapping(0, 1, 2, m_years, m_numericMonths);
m_proxy->setMapping(m_mapping);
}
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