Problem with qwtplot update/ destruction

habbas33

Dear,

I am using a qwt plot and I want to update/or delete on a button click... problem is that i cannot delete the axis scales and when I create new it gets overwrite as shown in pic below

I also have a delete button. and I first call on_PB_delete_clicked() and then on_PB_WavenumberSpectrum_clicked()

#include "subwindow_uwi.h"
#include "ui_subwindow_uwi.h"
#include <qwt_scale_draw.h>
#include "dmg_eva.h"
#include <QMessageBox>
#include "plot_frm.h"
 
 
class MyScaleDraw1: public QwtScaleDraw
{
public:
    MyScaleDraw1()
    {
        setTickLength( QwtScaleDiv::MajorTick, 10 );
        setTickLength( QwtScaleDiv::MinorTick, 2 );
        setTickLength( QwtScaleDiv::MediumTick, 0 );
 
        setLabelRotation( 0 );
        setLabelAlignment( Qt::AlignLeft | Qt::AlignVCenter );
        setSpacing( 10 );
    }
 
    virtual QwtText label( double value ) const
    {
        QwtText h=QwtText(QString::number((value*info_Inspection.scanInterval.toFloat())-(info_Inspection.Width.toInt()/2)));
        return h;
    }
};
 
class MyScaleDraw2: public QwtScaleDraw
{
public:
    MyScaleDraw2()
    {
        setTickLength( QwtScaleDiv::MajorTick, 2 );
        setTickLength( QwtScaleDiv::MinorTick, 0 );
        setTickLength( QwtScaleDiv::MediumTick, 0 );
        setLabelRotation( 0 );
        setLabelAlignment( Qt::AlignLeft | Qt::AlignVCenter );
        setSpacing( 10 );
    }
 
    virtual QwtText label( double value ) const
    {
        QwtText h=QwtText(QString::number((value*25/(info_FPGA.s_points/2))-12.5,'f',1));
        return h;
    }
};
 
subwindow_uwi::subwindow_uwi(QWidget *parent) :
    QDialog(parent),
    ui(new Ui::subwindow_uwi)
{
    ui->setupUi(this);
}
 
subwindow_uwi::~subwindow_uwi()
{
    delete ui;
}
 
void subwindow_uwi::setframe()
{
	d_plot_WavenumberSpectrum = new plot_frm( ui->WavenumberSpectrum );
	d_plot_WavenumberSpectrum->setGeometry(20,20,400,320);
	d_plot_WavenumberSpectrum->updateGeometry();
	d_plot_WavenumberSpectrum->updateAxes();
	d_plot_WavenumberSpectrum->setcolorbarmax(9);
	d_plot_WavenumberSpectrum->setAxisScaleDraw( QwtPlot::xBottom, new MyScaleDraw1() );
	d_plot_WavenumberSpectrum->setAxisScaleDraw( QwtPlot::yLeft, new MyScaleDraw2() );
}
 
void subwindow_uwi::on_PB_delete_clicked()
{
    delete d_plot_WavenumberSpectrum;
 
}
 
void subwindow_uwi::on_PB_WavenumberSpectrum_clicked()
{
    QMessageBox msgb;
 
    if(run_wavenumber_vs_frequency_read() != SIPIF_ERR_OK )
    {  msgb.setText("Cannot read");   msgb.exec();
    }
 
    setframe();
 
}

kshegunov

Hi,
Please upload the image to an external site (e.g. postimage.org) and link it here with the appropriate tag: ![](image url).
The forum's upload feature isn't working properly, so we can't see the picture.

habbas33

Edit: Fixed link to image -- @Wieland