QLabel setText Problem

[pmabie]

Hello
I made a simple form in the Qt Designer, 4 QLabel's and 1 Process bar.
I am trying to feed the QLabela file name to be displayed in the my Dialog.

labelFileName->setText(filename);

labelFileName->setText(filename);

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no matter what I do, I just can't get it to print the line, the only way I got it to work was to place a statement after setupUI.

setupUi(this)
labelFileName->setText("Test");

setupUi(this)
labelFileName->setText("Test");

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My Question is , why doesn't my statement work.

Thanks for your time .

Patrick.

[jacek]

Where did you try to place that line?

[pmabie]

In the dialog containing the QLabel * labelFilename

hope that helps..

thanks for the reply!

Patrick.

[jacek]

Could you post an example of non-working code?

[pmabie]

/*
   ProcessingDlg.Cpp
*/
 
#include "MainWindow.h"
#include <QtGui>
#include <QCloseEvent >
#include "ProcessingDlg.h"
#include "Config.h"
 
ProcessingDlg::ProcessingDlg(QWidget *parent, MainWindow *h)
     : QDialog(parent),help(h)
{
	 setupUi(this);
}
 
void ProcessingDlg::closeEvent(QCloseEvent *m_pevent)
{
	help->m_pProcessDlg = false;
	delete help->m_pProcessDlg;
	m_pevent->accept();
}

/*
   ProcessingDlg.Cpp
*/

#include "MainWindow.h"
#include <QtGui>
#include <QCloseEvent >
#include "ProcessingDlg.h"
#include "Config.h"

ProcessingDlg::ProcessingDlg(QWidget *parent, MainWindow *h)
     : QDialog(parent),help(h)
{
	 setupUi(this);
}

void ProcessingDlg::closeEvent(QCloseEvent *m_pevent)
{
	help->m_pProcessDlg = false;
	delete help->m_pProcessDlg;
	m_pevent->accept();
}

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/*
  ProcessingDlg.h
*/
 
#ifndef PROCESSINGDLG_H
#define PROCESSINGDLG_H
 
#include"ui_Processing.h"
 
class MainWindow;
class QLabel;
 
class ProcessingDlg : public QDialog, public Ui::Process
{
    Q_OBJECT
 
public:
    ProcessingDlg(QWidget *parent,MainWindow *h);
	MainWindow *help;
 
protected:
    void closeEvent(QCloseEvent *m_pevent);
 
public slots:
 
private:
	Ui::Process ui;
 
public:
 
};
 
#endif

/*
  ProcessingDlg.h
*/

#ifndef PROCESSINGDLG_H
#define PROCESSINGDLG_H

#include"ui_Processing.h"

class MainWindow;
class QLabel;

class ProcessingDlg : public QDialog, public Ui::Process
{
    Q_OBJECT

public:
    ProcessingDlg(QWidget *parent,MainWindow *h);
	MainWindow *help;
	
protected:
    void closeEvent(QCloseEvent *m_pevent);

public slots:

private:
	Ui::Process ui;
	
public:
	
};

#endif

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if(!m_pProcessDlg)
 	       m_pProcessDlg = new ProcessingDlg(m_pTab,this);
 
        // Make FIle List of Directory
	QFileInfoList m_pFinfo = CurrentDir.entryInfoList();
 
	m_pEntries = m_pFinfo.count();
 
	m_pProcessDlg->progressBar->setMaximum(m_pEntries);
	m_pProcessDlg->progressBar->setValue(m_pCurrentEnt);
 
	if(!CurrentDir.cd(DirPath))
	{
		QMessageBox::information(this,tr("Error"),tr("Can't Cd into %1").arg(DirPath));
		return false;
	}
 
	m_pProcessDlg->labelDirectory->setText(DirPath);

if(!m_pProcessDlg)
 	       m_pProcessDlg = new ProcessingDlg(m_pTab,this);

        // Make FIle List of Directory
	QFileInfoList m_pFinfo = CurrentDir.entryInfoList();
	
	m_pEntries = m_pFinfo.count();
	
	m_pProcessDlg->progressBar->setMaximum(m_pEntries);
	m_pProcessDlg->progressBar->setValue(m_pCurrentEnt);
	
	if(!CurrentDir.cd(DirPath))
	{
		QMessageBox::information(this,tr("Error"),tr("Can't Cd into %1").arg(DirPath));
		return false;
	}
	
	m_pProcessDlg->labelDirectory->setText(DirPath);

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Hope this helps , thanks again for your time , it's greatly appreciated!
Patrick

[jacek]

help->m_pProcessDlg = false;
delete help->m_pProcessDlg;

This is wrong --- the second line should be first.

if(!m_pProcessDlg)
m_pProcessDlg = new ProcessingDlg(m_pTab,this);
...
m_pProcessDlg->labelDirectory->setText(DirPath);

Do you invoke exec() on m_pProcessDlg anywhere?

P.S. Please use [code] tags for code snippets, not [qtclass]. The latter is for linking to Qt docs.

[pmabie]

Really sorry , I will remember that .

I am doing a show();

Patrick.

[jacek]

I am doing a show();

OK, then maybe you declare m_pProcessDlg more than once?

[pmabie]

I will check on that , but I pretty sure that it's in my mainwindow.h

Thanks!

[pmabie]

Checked it out , only one time, I tried to setText before the show() worked fine , after I show it , I lose contact ....

thanks alot for you time!

Patrick.

[jacek]

Then maybe you have some kind of a loop that blocks the event loop and you simply can't see that the text was changed.