Searching with QRefExp, Wildcards

[deepal_de]

Hello

i have a QTableWidget and a QlistWidget..
im implementing a search function like i Qt Designer.
When the user types something in the textbox items in QTableWidget and QlistWidget will be filtered..

how can i add wildcard searching functionality to my search function...
can someone post a code sample

thanks..

[Lykurg]

maybe you could first post your code you are using. Using wildcards is just a parameter for your QRegExp.

[deepal_de]

sorry for taking a long time to reply

I have something like this

.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
 
QStringList lst_ListItems;
MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
    lst_ListItems.append("QtBlog");
    lst_ListItems.append("QtCenter");
    lst_ListItems.append("QtCreator");
    lst_ListItems.append("QtDesigner");
    lst_ListItems.append("Wildcard");
 
    for(int iIndex = 0; iIndex < lst_ListItems.count(); ++iIndex)
    {
        QListWidgetItem* pItem = new QListWidgetItem;
        pItem->setText(lst_ListItems.at(iIndex));
        ui->lstNamesControl->addItem(pItem);// lstNamesControl is a QListWidget
    }
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
 
void MainWindow::on_txtSearch_textChanged(QString )
{
    QString sSearch = ui->txtSearch->text(); // txtSearch is a QLineEdit 
     ui->lstNamesControl->clear();
    for(int iIndex = 0; iIndex < lst_ListItems.count(); ++iIndex)
    {
        QListWidgetItem* pItem = new QListWidgetItem;
        pItem->setText(lst_ListItems.at(iIndex));
        if(pItem->text().contains(sSearch, Qt::CaseInsensitive))
            ui->lstNamesControl->addItem(pItem);
    }
}

#include "mainwindow.h"
#include "ui_mainwindow.h"

QStringList lst_ListItems;
MainWindow::MainWindow(QWidget *parent) :    QMainWindow(parent),    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    lst_ListItems.append("QtBlog");
    lst_ListItems.append("QtCenter");
    lst_ListItems.append("QtCreator");
    lst_ListItems.append("QtDesigner");
    lst_ListItems.append("Wildcard");

    for(int iIndex = 0; iIndex < lst_ListItems.count(); ++iIndex)
    {
        QListWidgetItem* pItem = new QListWidgetItem;
        pItem->setText(lst_ListItems.at(iIndex));
        ui->lstNamesControl->addItem(pItem);// lstNamesControl is a QListWidget
    }
}

MainWindow::~MainWindow()
{
    delete ui;
}


void MainWindow::on_txtSearch_textChanged(QString )
{
    QString sSearch = ui->txtSearch->text(); // txtSearch is a QLineEdit 
     ui->lstNamesControl->clear();
    for(int iIndex = 0; iIndex < lst_ListItems.count(); ++iIndex)
    {
        QListWidgetItem* pItem = new QListWidgetItem;
        pItem->setText(lst_ListItems.at(iIndex));
        if(pItem->text().contains(sSearch, Qt::CaseInsensitive))
            ui->lstNamesControl->addItem(pItem);
    }
}

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How can i add WildCards to something like this??

[Lykurg]

Hi, a more sophisticated way to filter a list would be to use a QSortFilterProxyModel with QStringListModel and QListView. But with your code: First the slot receives ui->txtSearch->text() as a parameter, so there is no need to query it again. Inside the loop do something have a look at: QRegExp in general and specific QRegExp::exactMatch(), QRegExp::setPatternSyntax() with QRegExp::Wildcard.

[deepal_de]

can you please post a example code...

i used it like this,but its not working

QString sSearch = ui->txtSearch->text();
     ui->lstNamesControl->clear();
 
     QRegExp regExp;
     regExp.setPatternSyntax(QRegExp::Wildcard);
    for(int iIndex = 0; iIndex < lst_ListItems.count(); ++iIndex)
    {
        QListWidgetItem* pItem = new QListWidgetItem;
        pItem->setText(lst_ListItems.at(iIndex));
        if(regExp.exactMatch(pItem->text()))
            ui->lstNamesControl->addItem(pItem);

QString sSearch = ui->txtSearch->text();
     ui->lstNamesControl->clear();

     QRegExp regExp;
     regExp.setPatternSyntax(QRegExp::Wildcard);
    for(int iIndex = 0; iIndex < lst_ListItems.count(); ++iIndex)
    {
        QListWidgetItem* pItem = new QListWidgetItem;
        pItem->setText(lst_ListItems.at(iIndex));
        if(regExp.exactMatch(pItem->text()))
            ui->lstNamesControl->addItem(pItem);

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---

Added after 8 minutes:

ohh. my mistake... got it
Thanks Lykurg

QRegExp regExp(sSearch );

QRegExp regExp(sSearch );

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