Problems with replot() and dynamical plotting

[huseyinkozan]

Hmm, it seems you override the original replot.
Maybe closing the auto replot works:

DataPlot::DataPlot(QWidget *parent): QwtPlot(parent)
{
setAutoReplot(false);

DataPlot::DataPlot(QWidget *parent): QwtPlot(parent)
{
setAutoReplot(false);

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or try to not override replot.


Hüseyin

[gi0rgi0ne]

That did not help either.

What is funny is that

connect(evolving_obj, SIGNAL(newSignal(double)), dynamics, SLOT(refreshP(double)));

connect(evolving_obj, SIGNAL(newSignal(double)), dynamics, SLOT(refreshP(double)));

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does not work.

connect(evolving_obj, SIGNAL(newSignal(double)), dynamics, SLOT(replot()));

connect(evolving_obj, SIGNAL(newSignal(double)), dynamics, SLOT(replot()));

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does not have any effect, HOWEVER

connect(someButton, SIGNAL(clicked()), dynamics, SLOT(replot()));

connect(someButton, SIGNAL(clicked()), dynamics, SLOT(replot()));

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works!! I do not understand that.

Why does one SIGNAL work and the other one does not??

[huseyinkozan]

Can you give the "Window.h". I want to see that your signal definition in the header. And also want to see the timer configuration (timer->start(), connect(timer,...) ...etc.) if it is possible.

Sometimes different function names doesn't give any error but it also doesn't work.


Hüseyin

[gi0rgi0ne]

my window.h

#ifndef WINDOW_H
#define WINDOW_H
 
#include <QWidget>
#include <QLabel>
#include <QApplication>
#include <QFont>
#include <QGridLayout>
#include <QHBoxLayout>
#include <QPushButton>
#include <QVBoxLayout>
#include <QtGui>
 
#include <iostream>
 
#include "widget2d.h"
#include "lcdrange.h"
 
 
#include <qapplication.h>
#include <qmainwindow.h>
#include <qwt_counter.h>
#include <qtoolbar.h>
#include <qlabel.h>
#include <qlayout.h>
#include "data_plot.h"
 
 
 
QT_BEGIN_NAMESPACE
class QLabel;
QT_END_NAMESPACE
 
class Window : public QWidget
{
 
public:
    Window(QWidget *parent = 0);
 
 
 
};
 
#endif

#ifndef WINDOW_H
#define WINDOW_H

#include <QWidget>
#include <QLabel>
#include <QApplication>
#include <QFont>
#include <QGridLayout>
#include <QHBoxLayout>
#include <QPushButton>
#include <QVBoxLayout>
#include <QtGui>

#include <iostream>

#include "widget2d.h"
#include "lcdrange.h"


#include <qapplication.h>
#include <qmainwindow.h>
#include <qwt_counter.h>
#include <qtoolbar.h>
#include <qlabel.h>
#include <qlayout.h>
#include "data_plot.h"



QT_BEGIN_NAMESPACE
class QLabel;
QT_END_NAMESPACE

class Window : public QWidget
{

public:
    Window(QWidget *parent = 0);



};

#endif

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and here the code of the widget2d.h, where the signals and the timer are:

#ifndef WIDGET2D_H
#define WIDGET2D_H
 
#include <QWidget>
#include <QImage>
#include <QRgb>
#include <iostream>
//#include <cstdlib>
#include <QtGui>
//#include <dranxor.h>
#include "ExVolWid.h"
 
class Widget2D : public QWidget
{
    Q_OBJECT
 
public:
    Widget2D(QWidget *parent = 0);
 
    QSize minimumSizeHint() const;
 
public slots:
    void nextAnimationFrame();
    void setGridScale(int value);
    void ScaleGrid();
    void changeStatus(bool s);
    void changeRes(int value);
 
signals:
    void scaleChanged(int newValue);
    void newSignal(double nS);
 
protected:
    void paintEvent(QPaintEvent *event);
    void timerEvent(QTimerEvent *event);
 
private:
    int ll;
    bool isStarted;
    bool isPaused;
    bool changed;
    int gridScale;
    ExVolWid* my_system;
    QBasicTimer timer;
};
 
#endif

#ifndef WIDGET2D_H
#define WIDGET2D_H

#include <QWidget>
#include <QImage>
#include <QRgb>
#include <iostream>
//#include <cstdlib>
#include <QtGui>
//#include <dranxor.h>
#include "ExVolWid.h"

class Widget2D : public QWidget
{
    Q_OBJECT

public:
    Widget2D(QWidget *parent = 0);

    QSize minimumSizeHint() const;

public slots:
    void nextAnimationFrame();
    void setGridScale(int value);
    void ScaleGrid();
    void changeStatus(bool s);
    void changeRes(int value);

signals:
    void scaleChanged(int newValue);
    void newSignal(double nS);

protected:
    void paintEvent(QPaintEvent *event);
    void timerEvent(QTimerEvent *event);

private:
    int ll;
    bool isStarted;
    bool isPaused;
    bool changed;
    int gridScale;
    ExVolWid* my_system;
    QBasicTimer timer;
};

#endif

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and widget2d.cpp code :

#include "widget2d.h"
#define min(a, b) a < b ? a : b
 
Widget2D::Widget2D(QWidget *parent) : QWidget(parent)
{
 
    ll = 50;
    gridScale = 400;
    setBackgroundRole(QPalette::Base);
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    changed = true;
    my_system = new ExVolWid(ll,1.0);
 
}
////////////
QSize Widget2D::minimumSizeHint() const
{
    return QSize(400, 400);
}
////////////
void Widget2D::setGridScale(int value)
{
     gridScale = value;
     emit scaleChanged(gridScale);
}
////////////
void Widget2D::ScaleGrid()
{
     gridScale = min(size().height(),size().width());
     update();
     emit scaleChanged(gridScale);
}
//////////////
void Widget2D::changeStatus(bool s)
{
    if (s){
        if (changed){
             delete my_system;
             my_system = new ExVolWid(ll,1.0);
             changed = false;
        }
        timer.start(50,this);
    }
    else {
        if (timer.isActive())
             timer.stop();
    }
}
//////////////////
void Widget2D::timerEvent(QTimerEvent *){
    update(); 
}
//////////////////
void Widget2D::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    painter.drawImage(0,0,my_system->get_pic().scaled(gridScale,gridScale));
    emit newSignal(my_system->getSignal());
    my_system->evolve();
}
///////////////////
void Widget2D::changeRes(int value)
{
   ll = value;
   changed = true;
}
///////////////////

#include "widget2d.h"
#define min(a, b) a < b ? a : b

Widget2D::Widget2D(QWidget *parent) : QWidget(parent)
{

    ll = 50;
    gridScale = 400;
    setBackgroundRole(QPalette::Base);
    setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
    changed = true;
    my_system = new ExVolWid(ll,1.0);

}
////////////
QSize Widget2D::minimumSizeHint() const
{
    return QSize(400, 400);
}
////////////
void Widget2D::setGridScale(int value)
{
     gridScale = value;
     emit scaleChanged(gridScale);
}
////////////
void Widget2D::ScaleGrid()
{
     gridScale = min(size().height(),size().width());
     update();
     emit scaleChanged(gridScale);
}
//////////////
void Widget2D::changeStatus(bool s)
{
    if (s){
        if (changed){
             delete my_system;
             my_system = new ExVolWid(ll,1.0);
             changed = false;
        }
        timer.start(50,this);
    }
    else {
        if (timer.isActive())
             timer.stop();
    }
}
//////////////////
void Widget2D::timerEvent(QTimerEvent *){
    update(); 
}
//////////////////
void Widget2D::paintEvent(QPaintEvent *)
{
    QPainter painter(this);
    painter.drawImage(0,0,my_system->get_pic().scaled(gridScale,gridScale));
    emit newSignal(my_system->getSignal());
    my_system->evolve();
}
///////////////////
void Widget2D::changeRes(int value)
{
   ll = value;
   changed = true;
}
///////////////////

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thanks for your help.

[huseyinkozan]

Sorry, I am not good at paintEvent related subjects. But it seems the problem is your style when using the timer event.
Try to get data in timer event, and replot it in the timer.
Maybe calling the replot in the paintEvent is confusing.


Hüseyin

[gi0rgi0ne]

I do not use paintEvent with the data_plot class. I just use it to let my Widget2d evolve, this is unrelated to the data_plot. My Widget2d-object (evolving_obj) then sends a new value via newSignal(double nS) to the data_plot object.

So data_plot does not need a timer, it should update when ever it gets a new value.

Maybe calling the replot in the paintEvent is confusing.

The methods "void Widget2D::timerEvent(QTimerEvent *)" and "void Widget2D::paintEvent(QPaintEvent *)" are only talking to the Widget2D object and should be (at least I hope, tell me if I am wrong) completely unrelated to the data_plot-object.