static QTimer

[PauloF91]

Instead can you tell use what actually you have to do, and how you are doing it?

Im plotting some data in a few graphics I've made myself.
Each graph represents an object. And I have 2 kinds of graphs (therefore, 2 classes):
- line graphs (Class GraphLine);
- histograms (Class GraphHistogram).

And they both inherit from a base class Graph.
So I thought I could use a Timer, so each time it timed out, I could update all graphs with new data.
I had it working, but I was creating one timer per graph. That was not a problem until I realized I wanted to stop and re-start all timers at once each time I wanted (while the program was running).

That's when I thought of a static Timer.

//graph.h
#ifndef GRAPH_H
#define GRAPH_H
#include <QTimer>
 
class Graph{
public:
    Graph(/*stuff*/);
    static QTimer *timer;
 
protected:
    /*stuff*/
};
 
#endif // GRAPH_H

//graph.h
#ifndef GRAPH_H
#define GRAPH_H
#include <QTimer>

class Graph{
public:
    Graph(/*stuff*/);
    static QTimer *timer;

protected:
    /*stuff*/
};

#endif // GRAPH_H

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//graph.cpp
#include "graph.h"
 
QTimer *Graph::timer = new QTimer(0);
 
Graph::Graph(/*stuff*/){
    /*stuff*/
}

//graph.cpp
#include "graph.h"

QTimer *Graph::timer = new QTimer(0);

Graph::Graph(/*stuff*/){
    /*stuff*/
}

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//graphline.h (same goes for graphhistogram.h)
#ifndef GRAPHLINE_H
#define GRAPHLINE_H
#include "graph.h"
class GraphLine : public Graph{
public:
    GraphLine(/*stuff*/);
    void updateGraph(int rand = 0);
 
private:
    int graphArray[100];
 
public slots:
    void MySlot();
};
#endif // GRAPHLINE_H

//graphline.h (same goes for graphhistogram.h)
#ifndef GRAPHLINE_H
#define GRAPHLINE_H
#include "graph.h"
class GraphLine : public Graph{
public:
    GraphLine(/*stuff*/);
    void updateGraph(int rand = 0);

private:
    int graphArray[100];

public slots:
    void MySlot();
};
#endif // GRAPHLINE_H

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//graphline.cpp
#include "graphline.h"
 
GraphLine::GraphLine(/*stuff*/) : Graph(/*stuff*/){
    updateGraph(0);
    QObject::connect(timer, SIGNAL(timeout()), this, SLOT(MySlot()));
    timer->start(40);
}
 
void GraphLine::updateGraphic(int rand){ 
    /*graphic draw process*/ 
}
 
void GraphLine::MySlot(){
    updateGraph(rand() % 100); // now i'm just giving rand values instead of true data
}

//graphline.cpp
#include "graphline.h"

GraphLine::GraphLine(/*stuff*/) : Graph(/*stuff*/){
    updateGraph(0);
    QObject::connect(timer, SIGNAL(timeout()), this, SLOT(MySlot()));
    timer->start(40);
}

void GraphLine::updateGraphic(int rand){ 
    /*graphic draw process*/ 
}

void GraphLine::MySlot(){
    updateGraph(rand() % 100); // now i'm just giving rand values instead of true data
}

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