Loading QStringList value received from signal slot
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In my qt c++ application a QStringList is sent from one cpp file(MainWIndow) to another cpp file(Dialog) via signal and slots mechanism! I want to display the elements in the qtringList on a combo box in the Dialog.ui when the interface gets loaded(no button click)!
following is my code
#include "dialog.h"
#include "ui_dialog.h"Dialog::Dialog(QWidget *parent) :
QDialog(parent),
ui(new Ui::Dialog)
{
ui->setupUi(this);for(int i=0;i<subMessages.size();i++){
ui->comboBox->addItem(subMessages[i]);}}
void Dialog::receiveSubMessages(QStringList List){
subMessages=List;}
The QStringList is received successfully through the slot(already verified).Though I used a for loop and tried display (as in the code) nothing was displayed on the combo box! How can I fix this issue?
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@Lasith said in Loading QStringList value received from signal slot:
The QStringList is received successfully through the slot(already verified).
Hi @Lasith
The
receiveSubMessages(QStringList List)is called after the construction of your Dialog , Every time you try to add an item on your comboxBox your List is empty ,Can you share the other parts of your code ?
Maybe you just wanna have another argument on your Dialog constructor ?
For example:
Dialog::Dialog(QStringList listToLoad, QWidget *parent = 0) ; -
Hi,
To add to @mostefa, if you want to update your combo box, you should first clear it and the call the QComboBox::addItems method. This will avoid that unnecessary loop.
Note that you should also pass your QStringList as const reference, that will avoid an unnecessary copy.
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Hi
If you changed to
Dialog::Dialog(QStringList listToLoad, QWidget *parent = 0) ;Make sure to change it both in .h file and .cpp file so they match.
