Can't write in a dialog

hjohn

I have one classA with its GUI form , another class ClassB with its own GUI form and when I try to send text from ClassA to ClassB's GUI , I'm getting this message.

I had QHBoxLayout , which was holding a QTextEdit and a QPushButton.
So when I click that button , text from that QTextEdit should be written.

QIODevice::write (QTextEdit, "SendtextEdit"): ReadOnly device //'SendtextEdit' is the name of QTextEdit

so out of nowhere I came with the solution of removing the QHBoxLayout and after that Idea....I've got another error message

QIODevice::write (QWidget, "qt_scrollarea_hcontainer"): ReadOnly device

so whats happening here ?

jsulm

@hjohn QIODevice::write?! Can you please show the code? It is really unclear what you're doing. To exchange data between different UI classes you should either use signals/slots or public methods.
" text from that QTextEdit should be written" - written to where? Into a file?

hjohn

@jsulm
I am trying to build a client server chat
server is all set, But now in client ...I have three classes
1. class clientMainForm : public QDialog
2.class clientWidget : public QWidget
3.class myDelegate : public QStyledItemDelegate

no 1. creates QTcpSocket and all its connections with signals and slots. It has main GUI which handles the client , meaning the main gui of the current client.
no 2. Its a widget (GUI form ) for the clients that are connected , other than the current client.
no3. is Delegate class in which
QWidgetcreateEditor(QWidget parent, const QStyleOptionViewItem &option, const QModelIndex &index) const;
method has been implemented to create clientWidget as an editor. Delegate class is called in clientMainForm .

thats clientWidget 's gui. which gets open in clientMainForm's GUI. when we click on OK button , that message should go to the other client through server ...thats the main task here.
I have used signals and slots to make all the connections and the all are working fine but when it comes for QTcpSocket::write(message.tostdstring().c_str()); it displays the message mentioned at the beginning of the thread.

So in conclusion , the question is , How can we make this editor which was created by using QStyledItemDelegate ,work like any other GUI ?

mrjj

@hjohn said in Can't write in a dialog:

QIODevice::write (QTextEdit, "SendtextEdit"):

That looks really odd.
do you mean
write (QTextEdit->text());

please show the actual real code.

hjohn

@mrjj thank you very much for responding
1. class clientMainForm : public QDialog

void clientMainForm ::clientListArrived(QString ID)
{
     myDelegate *delegate=new myDelegate (ID);
     clientWidget *form=new clientWidget ();
     ui->listView->setItemDelegate(delegate);
     QStandardItem*item=new QStandardItem;
     QStandardItemModel *model=new QStandardItemModel;
     model->setItem(count,item);
     const QModelIndex index=model->index(count,0,QModelIndex());
     count++;
     ui->listView->openPersistentEditor(index);
   }
void clientMainForm ::sendMessage(QString message)
{
   
    if(!message.isEmpty()){
        if(m_clientSocket->write(message.tostdString().c_str())){
            ui->senderTxt->clear();
            ui->senderTxt->setFocus();
        }
   }
}

2.class clientWidget : public QWidget // ui of this class , you'll find in previous post

void clientWidget ::on_pushButton_clicked()
{
    QString message=":"+ui->SendtextEdit->toPlainText().trimmed();
    emit privateMessage(message);            //this signal is connected to the clientMainForm ::sendMessage(QString message) slot.
   ui->textEdit->append(message);       
}

3.class myDelegate : public QStyledItemDelegate

QWidget*myDelegate ::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const{
    clientWidget *editor=new clientWidget (parent);
    return editor;
}

whenever a new client arrives , QStrign ID is given to that client and after that void clientMainForm ::clientListArrived(QString ID ) is called.

jsulm

This post is deleted!

jsulm

@hjohn It's not clear where m_clientSocket is created/comming from and where it is actually connected.

hjohn

@jsulm its in class clientMainForm : public QDialog
As I have mentioned earlier , everything about QTcpSocket is done in clientMainForm class using signals and slots.
in clientMainForm.h,

public:
 QTcpSocket *m_clientSocket;

clientMainForm.cpp

void clientMainForm::on_btnConnect_clicked()
{
    m_clientSocket=new QTcpSocket(this);
    m_clientSocket->connectToHost(ui->IPText->toPlainText(),qint16(ui->PortTxt->toPlainText().toInt()));
    if(m_clientSocket->waitForConnected(1000)){
       qDebug()<<"Client Connected";
     }
   connect(m_clientSocket,SIGNAL(readyRead()),this,SLOT(ReceiveData()));
   connect(m_clientSocket,SIGNAL(disconnected()),this,SLOT(connectionLost()));

}

SGaist

Hi,

Are you trying to implement something like Qt's network chat example ?

hjohn

@SGaist not exactly the same
What I'm trying here is , I have a QListView in which , by using QWidget createEditor();* multiple creators(the image iploaded in earlier post) are created . I want to send the text written in that editor to server.

jsulm

@hjohn Did you make sure that your m_clientSocket is actually connected?

hjohn

@jsulm Yes, It's connected and working properly.
The problem arises when I try to send message from the editor.

SGaist

So you want to have several "chat windows" in your QListView that all send to the same server ?

hjohn

@SGaist Yes.
I have a QListView and QWidgetcreateEditor()* has put those chat windows in that ListView.

SGaist

And each of these chat window would handle its socket itself ?

hjohn

@SGaist yes probably
the widget should recognize the socket .

SGaist

Then it looks like the Fortune Client example might be a better base.