ListWidget_ItemSelectionChanged cannot be run more than once?

**jins** · 28th November 2010, 19:41

Hi i am having a problem and cannot figure out how to fix.

I get a list of records displayed in a listwidget, and when a user clicks on a record the below function gets the associated record ID and displays the full record details in a webview. (All this works fine)

When a user reads through the webview they can click a pushbutton to go back to the listwidget where they can click on other records in the list. The problem i am getting is, if the user clicks on the same record as before weird things start to happen.

Initially nothing happens but if i click on the search button (which selects data from database and displays in listwidget), it then takes me to webview. I suspect the itemselectionchanged needs me to select off and then on the original record or on a new unselected record.

Is there anyway around this? Any examples would really help.

Qt Code:

Switch view

void MainWindow::on_listWidget_itemSelectionChanged()
{
 
    int iRow = ui->listWidget->currentRow();
    int strID = persondata.at(iRow)->ID;
 
    persondata.clear();
    persondata = dbManager->getPersonData(strID);
 
    //Create instance
    PersonData* persondata3;
 
    //Start html tags
    QString htmltext = "<html><body>";
 
    //Loop through returned records
    foreach(persondata3,persondata)
    {
 
        //Add each record to Qstring variable
        htmltext.append("<br>");
        htmltext.append(persondata3->Address);
 
    }
 
 
    //End html tags and display in wbeview
    htmltext.append("</body></html>");
    ui->webView->setHtml(htmltext);
 
 
    //Go to where webview is displayed
    ui->stackedWidget->setCurrentIndex(2);
 
}

void MainWindow::on_listWidget_itemSelectionChanged()
{

    int iRow = ui->listWidget->currentRow();
    int strID = persondata.at(iRow)->ID;

    persondata.clear();
    persondata = dbManager->getPersonData(strID);

    //Create instance
    PersonData* persondata3;

    //Start html tags
    QString htmltext = "<html><body>";

    //Loop through returned records
    foreach(persondata3,persondata)
    {

        //Add each record to Qstring variable
        htmltext.append("<br>");
        htmltext.append(persondata3->Address);

    }


    //End html tags and display in wbeview
    htmltext.append("</body></html>");
    ui->webView->setHtml(htmltext);


    //Go to where webview is displayed
    ui->stackedWidget->setCurrentIndex(2);

}

To copy to clipboard, switch view to plain text mode

**jins** · 28th November 2010, 22:34

I ma having another problem with this function. If i clicked on a record in the listwidget then view webview and then go back to listwidget list and repeat process on another 5 different records the application crashes.