QwtDateScaleDraw understading

[Stank]

Hi,

Thank you very much for your reply.

I have a main window which I have used showMaximized on.

ui->setupUi(this);
    this->showMaximized();

ui->setupUi(this);
    this->showMaximized();

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I've have then added two main items :
a scrollArea and a tabWidget

QScrollArea* scrollArea = new QScrollArea;
ui->layout->addWidget(scrollArea,1,0,1,4);
//The tabWidget is created in Designer but filled with line codes and I have placed it for it to fill the rows I wanted
ui->layout->addWidget(ui->tabWidget,1,5,1,9);

QScrollArea* scrollArea = new QScrollArea;
ui->layout->addWidget(scrollArea,1,0,1,4);
//The tabWidget is created in Designer but filled with line codes and I have placed it for it to fill the rows I wanted
ui->layout->addWidget(ui->tabWidget,1,5,1,9);

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I have one of the tabs that contains my plot (and 4 buttons).

layoutTab1->addWidget(button1,0,0);
layoutTab1->addWidget(button2,0,1);
layoutTab1->addWidget(button3,0,2);
layoutTab1->addWidget(button4,0,3);
layoutTab1->addWidget(myPlot,2,0,1,5);
ui->tab1->setLayout(layoutTab1);

layoutTab1->addWidget(button1,0,0);
layoutTab1->addWidget(button2,0,1);
layoutTab1->addWidget(button3,0,2);
layoutTab1->addWidget(button4,0,3);
layoutTab1->addWidget(myPlot,2,0,1,5);
ui->tab1->setLayout(layoutTab1);

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I have tried to put sizeConstraint on my layoutTab1 but it had no effect, and a sizeFixed on my mainLayout didn't do the trick either.

I don't know if it's relevant for my problem, but I need to display different plots depending on the button choosed, so I've put all my plots on the same place and hide/show them when a button is clicked.

I have now added curves to my plot but I still have this issue with my date format and my scale engine. I m aware that I'm probably doing it wrong, but as I said earlyer this one of my first Qt Project. Sorry if I'm still missing informations.

Thanks for your help,

Stank

[Stank]

This is not the solution i was aiming for but it worked :

I solved my scale problem at the same time as my format problem using this method :
(original post in french) : http://www.developpez.net/forums/d10...-axe-absisses/
overight the QwtText label function :

class TimeScaleDraw: public QwtScaleDraw
{
	virtual QwtText label(double v) const    
	{		
		QDateTime t = QDateTime::fromTime_t((int)v);	//cf fromTime_t	
		return t.toString("dd/MM/yyyy");    
	}
}

class TimeScaleDraw: public QwtScaleDraw
{
	virtual QwtText label(double v) const    
	{		
		QDateTime t = QDateTime::fromTime_t((int)v);	//cf fromTime_t	
		return t.toString("dd/MM/yyyy");    
	}
}

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and then

myPlot->setAxisScaleDraw(QwtPlot::xBottom, new TimeScaleDraw());
myPlot->setAxisScale(QwtPlot::xBottom, min, max);

myPlot->setAxisScaleDraw(QwtPlot::xBottom, new TimeScaleDraw());
myPlot->setAxisScale(QwtPlot::xBottom, min, max);

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where min and max are values in second since epoch.

Thanks for your time

Stank