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dynamiclly updating lables

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ndzz

Beginner

  • "ndzz" started this thread

Posts: 4

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1

Thursday, November 11th 2010, 7:07pm

dynamiclly updating lables

hey guys,
im trying to implement a GUI that scales based on a config file

Multiple labels defined on the gui, ie label_1, label_2, label_3

for( i = 0; i < parameternumber; i++)
{
ui,->label_(THIS NEEDS TO UPDATE BASED ON THE LOOP)->setText();
}

essentially it reads input in from a file, and updates the labels with that input accordingly in order
Thanks for any input

slevon

Trainee

Posts: 89

Location: Germany

Occupation: electrical engineer

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2

Thursday, November 11th 2010, 7:28pm

Hi,
you cant go to all the labels bx a loop, if thex are all defined seperatly
you have two options:
1) defining your labels yourself and the add them to your layout

Source code

 
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QString myNewData("filled");
QList<QLabel*> labels;
labels.append(new QLabel("Empty1"));  // your first label
 labels.append(new QLabel("Empty2"));  // your second label
 //add this QLabel pointers to your layout

for (int i=0;i<labels.size();i++)
{
labels[i]->setText(myNewData);  //this set all your labels to the content of the String 
}


2) if you want to use the labels you have added in your designer xour could do something like:

Source code

 
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QString myNewData("filled");
QList<QLabel*> labels;
labels.append(ui->label_1); // your first label
labels.append(ui->label_2); // your second label
//add this QLabel pointers to your layout

for (int i=0;i<labels.size();i++)
{
labels[i]->setText(myNewData); //this set all your labels to the content of the String 
}


I would prefer option one, because you can better scale it up if you need more labels in the future.

Do you know how to read Texts from files?
-If not have a look at QTextstream

Hope this helps,
slevon