Refresh problem with QPaintEvent

[Santosh Reddy]

You are on you own

#include <QtGui>
#include <QApplication>
#include "nightcharts.h"
 
class Dialog : public QDialog
{
    Q_OBJECT
 
public:
 
explicit Dialog(QWidget *parent = 0)
    : QDialog(parent)
    , index(0)
{
    this->setMinimumSize(800, 250);
    startTimer(1000);
}
 
protected:
 
void paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event);
    QPainter painter(this);
    addGraphs(&painter, A[index], B[index], C[index]);
}
 
private:
    static const int A[10];
    static const int B[10];
    static const int C[10];
    int index;
 
void addGraphs(QPainter *qp, int i, int j, int k)
{
    Nightcharts chart1;
    chart1.setShadows(false);
    chart1.setType(Nightcharts::Pie);
    chart1.setLegendType(Nightcharts::Vertical);
    chart1.setCords(50, 50, 80, 80);
    chart1.addPiece("Item1", QColor(200,10,50), i);
    chart1.addPiece("Item2", Qt::green, j);
    chart1.addPiece("Item3", Qt::cyan, k);
    chart1.draw(qp);
    chart1.drawLegend(qp);
 
    Nightcharts chart2;
    chart2.setShadows(false);
    chart2.setType(Nightcharts::Pie);
    chart2.setLegendType(Nightcharts::Vertical);
    chart2.setCords(300, 50, 80, 80);
    chart2.addPiece("Item2",Qt::green, j);
    chart2.addPiece("Item3",Qt::cyan,k);
    chart2.addPiece("Item4",Qt::yellow,i);
    chart2.draw(qp);
    chart2.drawLegend(qp);
 
    Nightcharts chart3;
    chart3.setShadows(false);
    chart3.setType(Nightcharts::Pie);
    chart3.setLegendType(Nightcharts::Vertical);
    chart3.setCords(550, 50, 80, 80);
    chart3.addPiece("Item1",QColor(200,10,50), k);
    chart3.addPiece("Item3",Qt::cyan, i);
    chart3.addPiece("Item4",Qt::yellow, j);
    chart3.draw(qp);
    chart3.drawLegend(qp);
}
 
void timerEvent(QTimerEvent *)
{
    index++;
    index = index % 10;
    this->update();
}
 
};
 
const int Dialog::A[] = { 10, 20, 30, 40, 50, 60, 70, 70, 50, 70 };
const int Dialog::B[] = { 20, 30, 40, 50, 40, 30, 20, 10, 20, 30 };
const int Dialog::C[] = { 70, 50, 30, 10, 10, 10, 10, 20, 30, 40 };
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
 
    Dialog dialog;
    dialog.exec();
 
    return a.exec();
}
 
#include "main.moc"

#include <QtGui>
#include <QApplication>
#include "nightcharts.h"

class Dialog : public QDialog
{
    Q_OBJECT

public:

explicit Dialog(QWidget *parent = 0)
    : QDialog(parent)
    , index(0)
{
    this->setMinimumSize(800, 250);
    startTimer(1000);
}

protected:

void paintEvent(QPaintEvent *event)
{
    Q_UNUSED(event);
    QPainter painter(this);
    addGraphs(&painter, A[index], B[index], C[index]);
}

private:
    static const int A[10];
    static const int B[10];
    static const int C[10];
    int index;

void addGraphs(QPainter *qp, int i, int j, int k)
{
    Nightcharts chart1;
    chart1.setShadows(false);
    chart1.setType(Nightcharts::Pie);
    chart1.setLegendType(Nightcharts::Vertical);
    chart1.setCords(50, 50, 80, 80);
    chart1.addPiece("Item1", QColor(200,10,50), i);
    chart1.addPiece("Item2", Qt::green, j);
    chart1.addPiece("Item3", Qt::cyan, k);
    chart1.draw(qp);
    chart1.drawLegend(qp);

    Nightcharts chart2;
    chart2.setShadows(false);
    chart2.setType(Nightcharts::Pie);
    chart2.setLegendType(Nightcharts::Vertical);
    chart2.setCords(300, 50, 80, 80);
    chart2.addPiece("Item2",Qt::green, j);
    chart2.addPiece("Item3",Qt::cyan,k);
    chart2.addPiece("Item4",Qt::yellow,i);
    chart2.draw(qp);
    chart2.drawLegend(qp);

    Nightcharts chart3;
    chart3.setShadows(false);
    chart3.setType(Nightcharts::Pie);
    chart3.setLegendType(Nightcharts::Vertical);
    chart3.setCords(550, 50, 80, 80);
    chart3.addPiece("Item1",QColor(200,10,50), k);
    chart3.addPiece("Item3",Qt::cyan, i);
    chart3.addPiece("Item4",Qt::yellow, j);
    chart3.draw(qp);
    chart3.drawLegend(qp);
}

void timerEvent(QTimerEvent *)
{
    index++;
    index = index % 10;
    this->update();
}

};

const int Dialog::A[] = { 10, 20, 30, 40, 50, 60, 70, 70, 50, 70 };
const int Dialog::B[] = { 20, 30, 40, 50, 40, 30, 20, 10, 20, 30 };
const int Dialog::C[] = { 70, 50, 30, 10, 10, 10, 10, 20, 30, 40 };

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    Dialog dialog;
    dialog.exec();

    return a.exec();
}

#include "main.moc"

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