Unsolved how open print dialog to select printer.

[raven-worx]

@Gaurav-Badgujar said in how open print dialog to select printer.:

i use given snippet but Printer Dialog not opened.

show your code pls.

[Gaurav Badgujar]

void ClassName::PrintButtonClick()
{
QPrinter* printer;
QPrintDialog printDialog(&printer, parent);
if (printDialog.exec() == QDialog::Accepted) {
this->webview->print( &printer );
}

i use above snippet but PrintDialog not invoked.

[jsulm]

@Gaurav-Badgujar Did you make sure PrintButtonClick() was called?

Also this is wrong (actually you're passing a pointer to a pointer which does not point to valid QPrinter instance):

QPrinter* printer;
QPrintDialog printDialog(&printer, parent);

You need to have a QPrinter instance:

QPrinter printer;
QPrintDialog printDialog(&printer, parent);

else you're passing a dangling pointer to QPrintDialog.

[raven-worx]

@Gaurav-Badgujar
i doubt that this even compiles?!
Do as @jsulm showed.

[Gaurav Badgujar]

sorry its my mistake in snippet.
i write ,
void ClassName::PrintButtonClick()
{
QPrinter printer;
QPrintDialog printDialog(&printer, parent);
if (printDialog.exec() == QDialog::Accepted) {
this->webview->print( &printer );
}
but QPrintDialog not invoked.

[jsulm]

@Gaurav-Badgujar Did you make sure PrintButtonClick() was called?

[Gaurav Badgujar]

yes..PrintButtonClick() function call.

[mrjj]

@Gaurav-Badgujar
Are you showing the real code ?
It works here. Same code shows Dialog
Only change is parent is replaced with this

void MainWindow::on_pushButton_2_released()
{
QPrinter printer;
QPrintDialog printDialog(&printer, this);<<<< said parent which didnt compile
if (printDialog.exec() == QDialog::Accepted) {
PrintWidget(this);
}
}

[Gaurav Badgujar]

hi,
i used below code.

void ClassName::PrintButtonClick()
{
QPrinter printer;
QPrintDialog printDialog(&printer, parent);
if (printDialog.exec() == QDialog::Accepted)
{
this->webview->print( &printer ); // application crashed when this line is executed.
}
}

with this print dialog executed but when webview's print function executed at that time application crashed.
give some suggestion to resolve this issue.

[mrjj]

@Gaurav-Badgujar
Are you sure this->webview is valid ?
Only reason i can think off.
It shows zero.
Often sign of dangling pointer

Please show the function where you new it.