Results 1 to 7 of 7

Thread: QTreeWidget SIGNAL

  1. 5th March 2006, 16:00 #1
    raphaelf
    raphaelf is offline Advanced user
    Join Date
    Jan 2006
    Posts
    273
    Thanks
    42
    Thanked 1 Time in 1 Post
    Qt products
    Qt3 Qt4
    Platforms
    Windows

    Default QTreeWidget SIGNAL

    QT:4.1.1

    Hello everybody,

    I am trying to call a function by clicking on a item with the signal: itemClicked()
    It happens nothing beim clicking on a item. Can somebody see what is wrong:

    Qt Code: 
    1. MainWindow::MainWindow()
    2.  
    3.     {
    4.         ui.setupUi(this);
    5.  
    6.  
    7.         connect(ui.tabellen_cb, SIGNAL(currentIndexChanged (int)), this, SLOT(selectTable()));
    8.         connect(ui.actionverbinden, SIGNAL(triggered()), this, SLOT(openLoginDialog()));
    9.         connect(ui.actionNeu, SIGNAL(triggered()), this, SLOT(insertNewRow()));
    10.         connect(ui.abfrage_btn, SIGNAL(clicked()), this, SLOT(selectTable()));
    11.         connect(ui.new_btn, SIGNAL(clicked()), this, SLOT(insertNewRow()));
    12.         connect(ui.delete_btn, SIGNAL(clicked()), this, SLOT(deleteRow()));
    13.         connect(ui.abfrage_btn, SIGNAL(clicked()), this, SLOT(addItemsToTreeWidget()));
    14.  
    15.  
    16. 		QTreeWidgetItem *root = new QTreeWidgetItem(ui.tree);
    17. 		QTreeWidgetItem *tables = new QTreeWidgetItem(root);
    18.        	connect(ui.tree, SIGNAL(itemClicked (tables,0)), this, SLOT(selectTable()));
    19.  
    20.  
    21.         init();
    22.  
    23.     }
    To copy to clipboard, switch view to plain text mode 

    Qt Code: 
    1. void MainWindow::selectTable()
    2. {
    3. 		/*
    4. 		QString table = ui.tabellen_cb->currentText();
    5. 		QSqlTableModel *model = new QSqlTableModel;
    6.         model->setTable(table);
    7.         //So kann man jeder Feld update: OnFiledChange
    8.         model->setEditStrategy(QSqlTableModel::OnFieldChange);
    9.         model->select();
    10.        
    11.  
    12.         ui.tableView->setModel(model);
    13.         ui.tableView->show();	
    14.         */
    15.         QTreeWidgetItem *root = new QTreeWidgetItem(ui.tree);
    16. 		root->setIcon(0, QIcon(QString::fromUtf8(":/images/images/database.jpg")));
    17. 		root->setText(0, "inventar");
    18.  
    19. 		QTreeWidgetItem *tables = new QTreeWidgetItem(root);
    20. 		tables->setIcon(0, QIcon(QString::fromUtf8(":/images/images/table.jpg")));
    21. 		tables->setText(0, "tabellen");
    22.         QString table = tables->text(0);
    23.         	QMessageBox::information(this,"",table);
    25.         model->setTable(table);
    26.         //So kann man jeder Feld update: OnFiledChange
    27.         model->setEditStrategy(QSqlTableModel::OnFieldChange);
    28.         model->select();
    29.  
    30.  
    31.         ui.tableView->setModel(model);
    32.         ui.tableView->show();	
    33.  
    34. }
    To copy to clipboard, switch view to plain text mode 

    Qt Code: 
    1. void MainWindow::addItemsToTreeWidget()
    2. {
    3. 		ui.tree->clear();
    4. 		ui.tree->setObjectName(QLatin1String("ui.tree"));
    5.         ui.tree->setHeaderLabels(QStringList(tr("database")));
    6.        // ui.tree->header()->setResizeMode(QHeaderView::Stretch);
    7.  
    8. 		QTreeWidgetItem *root = new QTreeWidgetItem(ui.tree);
    9. 		root->setIcon(0, QIcon(QString::fromUtf8(":/images/images/database.jpg")));
    10. 		root->setText(0, "inventar");
    11.  
    12. 		QTreeWidgetItem *tables = new QTreeWidgetItem(root);
    13. 		tables->setIcon(0, QIcon(QString::fromUtf8(":/images/images/table.jpg")));
    14. 		tables->setText(0, "tabellen");
    15.  
    16. 	QSqlQuery select("select * from sysobjects where xtype = 'U' order by name");
    17. 	while(select.next())
    18. 	{
    19. 		QString tabelle = select.value(0).toString();
    20. 		//new QTreeWidgetItem(tables, tabelle, 0);
    21. 		QTreeWidgetItem *items = new QTreeWidgetItem(tables);
    22. 		items->setText(0, tabelle);
    23. 		items->setIcon(0, QIcon(QString::fromUtf8(":/images/images/table.jpg")));
    24.  
    25. 	}      
    26.  
    27. }
    To copy to clipboard, switch view to plain text mode 
    Think DigitalGasoline
    Reply With Quote Reply With Quote
  2. 5th March 2006, 16:18 #2
    wysota's Avatar
    wysota
    wysota is offline The "Q"
    Nokia Certified Qt Developer
    Join Date
    Jan 2006
    Location
    Warsaw, Poland
    Posts
    33,360
    Thanks
    3
    Thanked 5,015 Times in 4,792 Posts
    Qt products
    Qt3 Qt4 Qt5 Qt/Embedded
    Platforms
    Unix/X11 Windows Android Maemo/MeeGo
    Wiki edits
    10

    Default Re: QTreeWidget SIGNAL

    Qt Code: 
    1. connect(ui.tree, SIGNAL(itemClicked (tables,0)), this, SLOT(selectTable()))
    To copy to clipboard, switch view to plain text mode 

    You can't set values in connect statements. You should use types there.

    Try this:
    Qt Code: 
    1. connect(ui.tree, SIGNAL(itemClicked (QTreeWidgetItem*,int)), this, SLOT(selectTable()))
    To copy to clipboard, switch view to plain text mode 
    Reply With Quote Reply With Quote
  3. 5th March 2006, 17:06 #3
    raphaelf
    raphaelf is offline Advanced user
    Join Date
    Jan 2006
    Posts
    273
    Thanks
    42
    Thanked 1 Time in 1 Post
    Qt products
    Qt3 Qt4
    Platforms
    Windows

    Default Re: QTreeWidget SIGNAL

    hi wysota!
    It works like this:
    Qt Code: 
    1. connect(ui.tree, SIGNAL(itemClicked (QTreeWidgetItem*,int)), this, SLOT(selectTable()))
    To copy to clipboard, switch view to plain text mode 

    But i would like to call "selectTable()" just if i click a item of tables (not root and tables it self, but all items of tables should be able to call my function "selectTable()":
    Qt Code: 
    1. .
    2. .
    3. QTreeWidgetItem *root = new QTreeWidgetItem(ui.tree);        
    4. root->setIcon(0, QIcon(QString::fromUtf8(":/images/images/database.jpg")));        
    5. root->setText(0, "inventar");                
    6. QTreeWidgetItem *tables = new QTreeWidgetItem(root);
    7. .
    8. .
    To copy to clipboard, switch view to plain text mode 
    Thats why i tryed:
    Qt Code: 
    1. connect(ui.tree, SIGNAL(itemClicked (tables,0)), this, SLOT(selectTable()))
    To copy to clipboard, switch view to plain text mode 

    Is that complex to implement?
    Think DigitalGasoline
    Reply With Quote Reply With Quote
  4. 5th March 2006, 17:18 #4
    jpn
    jpn is offline Guru
    Nokia Certified Qt Developer
    Join Date
    Feb 2006
    Location
    Oslo, Norway
    Posts
    6,264
    Thanks
    36
    Thanked 1,519 Times in 1,389 Posts
    Qt products
    Qt4
    Platforms
    MacOS X Unix/X11 Windows Symbian S60 Maemo/MeeGo

    Default Re: QTreeWidget SIGNAL

    You can't use parameter values in SIGNAL macro.
    You need to implement a slot for checking which item was clicked and then call selectTable() if appropriate.
    Reply With Quote Reply With Quote
  5. 5th March 2006, 17:19 #5
    wysota's Avatar
    wysota
    wysota is offline The "Q"
    Nokia Certified Qt Developer
    Join Date
    Jan 2006
    Location
    Warsaw, Poland
    Posts
    33,360
    Thanks
    3
    Thanked 5,015 Times in 4,792 Posts
    Qt products
    Qt3 Qt4 Qt5 Qt/Embedded
    Platforms
    Unix/X11 Windows Android Maemo/MeeGo
    Wiki edits
    10

    Default Re: QTreeWidget SIGNAL

    Provide a custom slot which checks values of those parameters.

    Qt Code: 
    1. void someclass::someslot(QTreeWidgetItem *item, int column){
    2.   if(item && column==0) selectTable();
    3. }
    To copy to clipboard, switch view to plain text mode 
    Reply With Quote Reply With Quote
  6. 5th March 2006, 17:30 #6
    raphaelf
    raphaelf is offline Advanced user
    Join Date
    Jan 2006
    Posts
    273
    Thanks
    42
    Thanked 1 Time in 1 Post
    Qt products
    Qt3 Qt4
    Platforms
    Windows

    Default Re: QTreeWidget SIGNAL

    Hi everybody
    Ok i will do that!
    Is there a possibility to get my selected Item text? I found none function at QTreeWidget and QTreeWidgetItem
    . I found just "text()".
    In QT 3 i could use xx->currentText().

    Its easy to get my selected text or its not possible?
    Think DigitalGasoline
    Reply With Quote Reply With Quote
  7. 5th March 2006, 17:35 #7
    jpn
    jpn is offline Guru
    Nokia Certified Qt Developer
    Join Date
    Feb 2006
    Location
    Oslo, Norway
    Posts
    6,264
    Thanks
    36
    Thanked 1,519 Times in 1,389 Posts
    Qt products
    Qt4
    Platforms
    MacOS X Unix/X11 Windows Symbian S60 Maemo/MeeGo

    Default Re: QTreeWidget SIGNAL

    Qt Code: 
    1. ui.tree->currentItem()->text()
    To copy to clipboard, switch view to plain text mode 
    Reply With Quote Reply With Quote
« Previous Thread | Next Thread »

Similar Threads

  1. QTreeWidget clicked signal
    By ^NyAw^ in forum Qt Programming
    Replies: 41
    Last Post: 30th January 2010, 11:42
  2. pthread instead QThread
    By brevleq in forum Qt Programming
    Replies: 8
    Last Post: 23rd December 2008, 07:16
  3. Connection of custon signals/slots
    By brevleq in forum Qt Programming
    Replies: 2
    Last Post: 23rd December 2008, 07:04
  4. QTreeWidget fails to emit itemClicked signal.
    By avh in forum Qt Programming
    Replies: 2
    Last Post: 6th June 2008, 18:49
  5. QTreeWidget double click signal
    By Pinco Pallino in forum Newbie
    Replies: 2
    Last Post: 18th November 2006, 16:37

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Digia, Qt and their respective logos are trademarks of Digia Plc in Finland and/or other countries worldwide.