Dynamic values for qSin and qCos giving error

[sreejithsjt]

Hi,

I tried all the way you have said.
I'm getting correct value only if I gave values directly. (ie If I took value from a text field and assigned to an integer, then its giving wrong values for qCos and qSin).
But if I print the value which I red from text filed using qDebug(), it'll get correct value.

The same code I tried in PC. Its working fine.

I'll add the program below which I hav done.

main.cpp

#include <QApplication>
#include "dialog.h"
 
int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Dialog dialog;
    dialog.setMinimumHeight(725);
    dialog.setMinimumWidth(1000);
 
    dialog.showMaximized();
    dialog.show();
 
    return app.exec();
}

#include <QApplication>
#include "dialog.h"

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    Dialog dialog;
    dialog.setMinimumHeight(725);
    dialog.setMinimumWidth(1000);

    dialog.showMaximized();
    dialog.show();

    return app.exec();
}

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dialog.cpp

#include <QtDebug>
 
#include "dialog.h"
Dialog::Dialog()
{
    drawCircle =0;
    main_widget = new QWidget;
    menu_layout = new QVBoxLayout;
 
    circleRadiusText =new QTextEdit("");
    circleRadiusText->setFixedHeight(30);
    circleRadiusText->setFixedWidth(130);
 
    QPushButton *submitButton = new QPushButton("OK");
    submitButton->setFixedWidth(300);
 
    menu_layout->addWidget(circleRadiusText);
    menu_layout->addWidget(submitButton);
    setLayout(menu_layout);
 
    QObject::connect(submitButton, SIGNAL(clicked()),this, SLOT(draw_Circle()));
 
}
void Dialog::draw_Circle()
{
 
    angle =  circleRadiusText->toPlainText().toInt();
 
    drawCircle =1;
    update();
}

#include <QtDebug>

#include "dialog.h"
Dialog::Dialog()
{
    drawCircle =0;
    main_widget = new QWidget;
    menu_layout = new QVBoxLayout;

    circleRadiusText =new QTextEdit("");
    circleRadiusText->setFixedHeight(30);
    circleRadiusText->setFixedWidth(130);

    QPushButton *submitButton = new QPushButton("OK");
    submitButton->setFixedWidth(300);

    menu_layout->addWidget(circleRadiusText);
    menu_layout->addWidget(submitButton);
    setLayout(menu_layout);

    QObject::connect(submitButton, SIGNAL(clicked()),this, SLOT(draw_Circle()));

}
void Dialog::draw_Circle()
{

    angle =  circleRadiusText->toPlainText().toInt();

    drawCircle =1;
    update();
}

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dialog.h

#ifndef DIALOG_H
#define DIALOG_H
 
#include <QDialog>
#include <stdlib.h>
#include <math.h>
#include <cmath>
#include <iostream>
#include <stdio.h>
 
QT_BEGIN_NAMESPACE
class QAction;
class QDialogButtonBox;
class QGroupBox;
class QLineEdit;
class QMenuBar;
class QPushButton;
class QTextEdit;
#include <QMainWindow>
#include <QTextEdit>
#include <QString>
#include <QtGui>
#include <QPushButton>
#include <QWidget>
#include <QBoxLayout>
#include <QPainter>
#include <QPaintEvent>
#include <QKeyEvent>
#include <QGraphicsView>
#include <qmath.h>
 
QT_END_NAMESPACE
 
class Dialog : public QDialog
{
    Q_OBJECT
 
public:
    Dialog();
 
private slots:
    void draw_Circle();
    void keyPressEvent(QKeyEvent *event)
    {
        if(event->key() == Qt::Key_Q)
        {
            qApp->exit();
        }
    }
    void paintEvent(QPaintEvent *)
    {
        QPainter Painter(this);
        Painter.setRenderHint(QPainter::Antialiasing,true) ;
        if (drawCircle ==1)
            {
                int x1,y1,x2,y2;
                x1 =100;
                y1 = 100;
                x2 = 400;
                y2 = 400;
                int midx = 300;
                int midy = 300;
                int radius = 200;
                angle1 = 100;
 
                qDebug()<< angle;
                qDebug()<< angle1;
                Painter.setBrush(QColor(Qt::white));
                Painter.drawEllipse(x1,y1,x2,y2);
                Painter.setPen(QPen(QColor(Qt::black)));
 
                Painter.drawLine(midx, midy, midx+radius, midy);
                Painter.drawLine(midx, midy, midx+(radius*qCos(angle1*3.14/180)),midy+(radius*qSin(angle1*3.14/180))); // This will work fine in both PC and embedded board.
                Painter.drawLine(midx, midy, midx+(radius*qCos(angle*3.14/180)),midy+(radius*qSin(angle*3.14/180))); // Only working in PC
            }
     }
public:
        QWidget *main_widget;
        QTextEdit *circleRadiusText;
        QVBoxLayout *menu_layout;
        int angle, angle1;
        int drawCircle;
 
};
 
#endif // DIALOG_H

#ifndef DIALOG_H
#define DIALOG_H

#include <QDialog>
#include <stdlib.h>
#include <math.h>
#include <cmath>
#include <iostream>
#include <stdio.h>

QT_BEGIN_NAMESPACE
class QAction;
class QDialogButtonBox;
class QGroupBox;
class QLineEdit;
class QMenuBar;
class QPushButton;
class QTextEdit;
#include <QMainWindow>
#include <QTextEdit>
#include <QString>
#include <QtGui>
#include <QPushButton>
#include <QWidget>
#include <QBoxLayout>
#include <QPainter>
#include <QPaintEvent>
#include <QKeyEvent>
#include <QGraphicsView>
#include <qmath.h>

QT_END_NAMESPACE

class Dialog : public QDialog
{
    Q_OBJECT

public:
    Dialog();

private slots:
    void draw_Circle();
    void keyPressEvent(QKeyEvent *event)
    {
        if(event->key() == Qt::Key_Q)
        {
            qApp->exit();
        }
    }
    void paintEvent(QPaintEvent *)
    {
        QPainter Painter(this);
        Painter.setRenderHint(QPainter::Antialiasing,true) ;
        if (drawCircle ==1)
            {
                int x1,y1,x2,y2;
                x1 =100;
                y1 = 100;
                x2 = 400;
                y2 = 400;
                int midx = 300;
                int midy = 300;
                int radius = 200;
                angle1 = 100;

                qDebug()<< angle;
                qDebug()<< angle1;
                Painter.setBrush(QColor(Qt::white));
                Painter.drawEllipse(x1,y1,x2,y2);
                Painter.setPen(QPen(QColor(Qt::black)));

                Painter.drawLine(midx, midy, midx+radius, midy);
                Painter.drawLine(midx, midy, midx+(radius*qCos(angle1*3.14/180)),midy+(radius*qSin(angle1*3.14/180))); // This will work fine in both PC and embedded board.
                Painter.drawLine(midx, midy, midx+(radius*qCos(angle*3.14/180)),midy+(radius*qSin(angle*3.14/180))); // Only working in PC
            }
     }
public:
        QWidget *main_widget;
        QTextEdit *circleRadiusText;
        QVBoxLayout *menu_layout;
        int angle, angle1;
        int drawCircle;

};

#endif // DIALOG_H

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By checking this program or by trying this program you can help me I guess.
Waiting for your reply...