QcomboBox delimiter

[user_mail07]

Guys,

I am trying to insert two items in comboBox.

I have QString like this QString str=" Item1, Item2";

QString CItemclass::GetStringFile ()
{
QString str;
......
str=" Item1, Item2";
 
return str;
 
}

QString CItemclass::GetStringFile ()
{
QString str;
......
str=" Item1, Item2";

return str;

}

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and then I am trying to insert to combobox

pComboBox->insertItems (0, GetStringFile().split(","));

pComboBox->insertItems (0, GetStringFile().split(","));

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or

pComboBox->insertStringList(GetStringFile().split(","));

pComboBox->insertStringList(GetStringFile().split(","));

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However I am able to insert items as list in the comboBox but it appear as follows in drop menu;-

Item1, Item2
Item2

I want to display as separate items but however the first item in the drop down menu is not getting seperated..even though i have used split(,) while inserting items at comboBox..
It should show as follows..

Item1
Item2

any clue or idea will be helpful.


thanks.

[wysota]

Do you have any items in the combobox before issuing the above code?

[user_mail07]

No, the comBoBox is empty. I am loading comboBox from UI form and I have checked the property of combobox.. current index is -1. I have one another Item3 in the comBoBox dropdown menu but that I am calling after running the code above..so basically after running the whole code it shows as follows

Item1,Item2
Item2
Item3
but there is nothing in the comBoBox before executing above code.

[wysota]

$ cat main.cpp
#include <QComboBox>
#include <QApplication>
 
int main(int argc, char **argv){
  QApplication app(argc, argv);
  QComboBox box;
  box.insertItems(0, QString("Item1, Item2").split(", "));
  box.show();
  return app.exec();
}

$ cat main.cpp
#include <QComboBox>
#include <QApplication>

int main(int argc, char **argv){
  QApplication app(argc, argv);
  QComboBox box;
  box.insertItems(0, QString("Item1, Item2").split(", "));
  box.show();
  return app.exec();
}

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This works quite fine for me. Double check your code please. Call pComboBox->clear() before adding items to it, just in case. Also add qDebug() << GetStringFile() to your code to make sure the string is what you expect it to be. Adding qDebug() << GetStringFile().split(", "); might be a good idea as well. Just make sure you call the function once and then operate on the result, like this:

QString str = GetStringFile();
qDebug() << str;
QStringList slist = str.split(", ");
qDebug() << slist;
pComboBox->clear();
pComboBox->insertItems(0, slist);

QString str = GetStringFile();
qDebug() << str;
QStringList slist = str.split(", ");
qDebug() << slist;
pComboBox->clear();
pComboBox->insertItems(0, slist);

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[user_mail07]

Thanks a lot Wysota !! Acutally I found a mistake in my program since i was calling insertItems() twice in my program and in the second call I was not calling str.split( ) function so it was being overwritten by calling insertItems( 0,str) insead of nsertItems( 0,str.split( ",")).

[user_mail07]

I have another question related to my last post . Is it possible to assign list of separate strings to QString ?

Code Snippet:

QString CItemclass::GetStringFile ()
 
   {
     QString str1 = "Item1"
     QString str2 = "Item2"
 
     QString mainStr;
 
     mainStr  = (  str1, str2);  //without assigning in quotes
     return mainStr;
   } 
 
Output : Item1
instead of 
Output: Item1
           Item2

QString CItemclass::GetStringFile ()
  
   {
     QString str1 = "Item1"
     QString str2 = "Item2"
   
     QString mainStr;

     mainStr  = (  str1, str2);  //without assigning in quotes
     return mainStr;
   } 

Output : Item1
instead of 
Output: Item1
           Item2

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The problem with this code is - it add only one string that is str1(Item1) the comboBox drop down menu. The problem appears if I want to read str1 from different resource file. The only way I can do this is declaring both strings ("Item1, Item2") here (hard coded). Is it possible to that we can return two different strings to the QString ?

[wysota]

I'm not sure I understand... You want to join two strings into one, correct?

QString s1 = "xxx";
QString s2 = "yyy";
QString result = s1 + ", " + s2;
// or
result = QString("%1, %2").arg(s1).arg(s2);
// or
QStringList slist;
slist << s1 << s2;
result = slist.join(", ");

QString s1 = "xxx";
QString s2 = "yyy";
QString result = s1 + ", " + s2;
// or
result = QString("%1, %2").arg(s1).arg(s2);
// or
QStringList slist;
slist << s1 << s2;
result = slist.join(", ");

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[user_mail07]

Thanks that solved my problem. I did not know how to return result of two strings from separate resources without doing hard code.

Following line worked for me.
QString result = s1 + ", " + s2;


I really appreciate for your help.

[wysota]

All of the three above work. The first solution is the most crude and prone to problems. The nicest is the last one.