Hi,

Is it possible to get your slots to call other functions from other classes?

I want to have my main qwidget's buttons call on a class I made that plots some QWTplots. This is what I'm working on now, but I am afraid I am going about the slot implementation the wrong way

Qt Code: 
  1. class myPlot : public QwtPlot
  2. {
  3.  ...
  4.   myPlot(){}
  5.   void loadFile( char * fn ) 
  6.    { 
  7.       //a function that opens a file...
  8.    }
  9.   void plot( double st, double end ) 
  10.    { 
  11.       //loads the data and assigns it to a curve...
  12.     }  
  13. };
  14. class myCanvas : public QWidget
  15. {
  16.   Q_OBJECT
  17. public:
  18.   myCanvas (QWidget * parent = 0);
  19.   public Q_SLOTS:
  20.     void enterFile();
  21.     void addFile();
  22.     void makePlot();
  23. };
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Qt Code: 
  1. myCanvas::myCanvas(QWidget *parent):QWidget(parent)
  2. {
  3. ....
  4.   myPlot *plot = new myPlot(); //is this even close to right?
  5.  
  6.   connect(pushbutton, SIGNAL(clicked()), this, SLOT(enterFile()));
  7.   connect(pushbutton, SIGNAL(clicked()), this, SLOT(addFile()));
  8.   connect(pushbutton, SIGNAL(clicked()), this, SLOT(makePlot()));
  9. ....
  10. }
  11.  
  12. void myCanvas::enterFile()
  13. {
  14.   QString theText = lineedit->text();                ///this works
  15.   FileName = qstrdup( theText.toLatin1() );
  16. }
  17. void myCanvas::addFile()
  18. {
  19.   plot->loadFile(FileName);               //error plot undeclared identifier
  20. }
  21. void myCanvas::slotButtonPlots()
  22. {
  23.   myPlot::plot(1264377600, 1288974375.51);     
  24.                //error: illegal call of non-static member function
  25.               // something like this maybe?
  26. }
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Any ideas how I can call these these myPlot functions with myCanvas, or is that impossible?

Do I have to make new functions in myCanvas in order for the slots to work?

Thanks a lot!