Hallo all,

I manage to adapt the tvplot example in my app. It works ok and i can see the plot. My issue now is to see the plot included in an already implemented dialog box. I read this has to be done via promote widget but when i promote to my Plot class i get many errors. Please i need urgently some help .

Find below the code of the cpp and h file of the plot

cpp
Qt Code: 
  1. #include <stdlib.h>
  2. #include <qpen.h>
  3. #include <qwt_plot_layout.h>
  4. #include <qwt_legend.h>
  5. #include <qwt_legend_item.h>
  6. #include <qwt_plot_grid.h>
  7. #include <qwt_plot_histogram.h>
  8. #include <qwt_column_symbol.h>
  9. #include <qwt_series_data.h>
  10. #include "plot.h"
  11.  
  12. class Histogram: public QwtPlotHistogram
  13. {
  14. public:
  15.     Histogram(const QString &, const QColor &);
  16.  
  17.     void setColor(const QColor &);
  18.     void setValues(uint numValues, char *);
  19. };
  20.  
  21. Histogram::Histogram(const QString &title, const QColor &symbolColor):
  22.     QwtPlotHistogram(title)
  23. {
  24.     setStyle(QwtPlotHistogram::Columns);
  25.  
  26.     setColor(symbolColor);
  27. }
  28.  
  29. void Histogram::setColor(const QColor &symbolColor)
  30. {
  31.     QColor color = symbolColor;
  32.     color.setAlpha(180);
  33.  
  34.     setPen(QPen(Qt::black));
  35.     setBrush(QBrush(color));
  36.  
  37.     QwtColumnSymbol *symbol = new QwtColumnSymbol(QwtColumnSymbol::Box);
  38.     symbol->setFrameStyle(QwtColumnSymbol::Raised);
  39.     symbol->setLineWidth(2);
  40.     symbol->setPalette(QPalette(color));
  41.     setSymbol(symbol);
  42. }
  43.  
  44. void Histogram::setValues(uint numValues, char *values)
  45. {
  46.     QVector<QwtIntervalSample> samples(numValues);
  47.     for ( uint i = 0; i < numValues; i++ )
  48.     {
  49.         QwtInterval interval(double(i), i + 1.0);
  50.         interval.setBorderFlags(QwtInterval::ExcludeMaximum);
  51.  
  52.         samples[i] = QwtIntervalSample(values[i], interval);
  53.     }
  54.  
  55.     setData(new QwtIntervalSeriesData(samples));
  56. }
  57.  
  58. Plot::Plot(QWidget *parent):
  59.     QwtPlot(parent)
  60. {
  61.     setTitle("Patient Adherence");
  62.  
  63.     setCanvasBackground(QColor(Qt::gray));
  64.     plotLayout()->setAlignCanvasToScales(true);
  65.  
  66.     setAxisTitle(QwtPlot::yLeft, "Probability(%)");
  67.     setAxisTitle(QwtPlot::xBottom, "Adherence");
  68.  
  69.     QwtLegend *legend = new QwtLegend;
  70.     legend->setItemMode(QwtLegend::CheckableItem);
  71.     insertLegend(legend, QwtPlot::RightLegend);
  72.  
  73.     populate();
  74.  
  75. //    connect(this, SIGNAL(legendChecked(QwtPlotItem *, bool)),
  76.        // SLOT(showItem(QwtPlotItem *, bool)));
  77.  
  78.     replot(); // creating the legend items
  79.  
  80.     QwtPlotItemList items = itemList(QwtPlotItem::Rtti_PlotHistogram);
  81.     for ( int i = 0; i < items.size(); i++ )
  82.     {
  83.         if ( i == 0 )
  84.         {
  85.             QwtLegendItem *legendItem = (QwtLegendItem *)legend->find(items[i]);
  86.             if ( legendItem )
  87.                 legendItem->setChecked(true);
  88.             items[i]->setVisible(true);
  89.         }
  90.         else
  91.             items[i]->setVisible(false);
  92.     }
  93.  
  94.     setAutoReplot(true);
  95. }
  96.  
  97. void Plot::populate()
  98. {
  99.     QwtPlotGrid *grid = new QwtPlotGrid;
  100.     grid->enableX(false);
  101.     grid->enableY(true);
  102.     grid->enableXMin(false);
  103.     grid->enableYMin(false);
  104.     grid->setMajPen(QPen(Qt::black, 0, Qt::DotLine));
  105.     grid->attach(this);
  106.  
  107.      char patientValues[] = { 'a', 'd', 'na'};
  108.  
  109.  
  110.     Histogram *histogramClient = new Histogram("Blue Pills", Qt::red);
  111.     histogramClient->setValues(
  112.         sizeof(clientValues) / sizeof(char), clientValues);
  113.     histogramClient->attach(this);
  114.  
  115. }
  116.  
  117. void Plot::showItem(QwtPlotItem *item, bool on)
  118. {
  119.     item->setVisible(on);
  120. }
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.h
Qt Code: 
  1. #pragma once
  2.  
  3. #include <qwt_plot.h>
  4.  
  5. class Plot: public QObject, public QwtPlot
  6. {
  7.     Q_OBJECT
  8.  
  9. public:
  10.     Plot(QWidget * = NULL);
  11.  
  12. private:
  13.     void populate();
  14.  
  15. private Q_SLOTS:
  16.     void showItem(QwtPlotItem *, bool on);
  17. };
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Thank you in advance!