Show message

jackfr

Can i create this kind of message with qt (without a boutton of confirmation like QMessageBox)
thank you

Pl45m4

Show a QWidget without any buttons.

jackfr

This post is deleted!

mrjj

Hi
But if there is no button to get rid of the Message,
how should user then close it ?
Also, Do you want the round corner etc also or was it just to show "without buttons" ?

jackfr

@mrjj in fact I want when I press the button there is a message that will be displayed for 5s after it closes automatically

Pl45m4

@jackfr

Then you need to start a timer and close/hide/destruct your widget automatically.

JonB

@jackfr
A plain QLabel or QWidget can show a message/text. Set off a QTimer to get rid of it when 5 seconds have passed.

mrjj

@jackfr
Hi
Small sample to get you going.


void ShowMsg(QWidget *parent, QString msg )
{
    QLabel *msgbox = new QLabel (parent);
    msgbox->setGeometry(100, 100, 300, 200); // size of the popup
    msgbox->setText(msg);
    msgbox->setStyleSheet("margin-left: 0px; border: 2px solid black; border-radius: 12px; background: #686a69; color: white;");
    msgbox->show();
 // this fire a timer after 5 secs and close and deletes the qlabel.
    QTimer::singleShot(5 * 1000, parent, [msgbox]() {
        msgbox->close();
        msgbox->deleteLater();
    });
}

void EditorMainWin::on_pushButton_pressed()
{
    ShowMsg(this, "im a line to be shown");
}

gives you
alt text

Chris Kawa

Just a little note to what @mrjj posted. It's always a good idea to tie timer connections (any other too actually) to objects the slot operates on. Otherwise you're running a risk of calling methods on objects that don't exist anymore. If something deletes the message box before the timeout, the lambda would crash, so it's better to tie the connection to msgbox and not parent.

Also, deleting a widget will close it first anyway, so in this case you can shorten it to:

QTimer::singleShot(5 * 1000, msgbox, &QWidget::deleteLater);

jackfr

@mrjj thank you