extend the standard context menu of qtextedit

[cai]

Hi all,
when i extend the standard context menu of qtextedit, i found all the actions is disable except the "paste" and "clear". why?


QMenu *editContextMenu = ui->textEdit->createStandardContextMenu();
editContextMenu->addAction(clear);
ui->textEdit->setContextMenuPolicy(Qt::CustomContextMenu);
...
editContextMenu->exec(QCursor::pos());

[wysota]

Some actions are enabled only in some contexts and not in others. Try selecting some text and then bring up the context menu.

[cai]

Hi wysota,
I have input something in the textedit, and then select them by mouse(because the "select all" action is disable), but the cut and copy actions are still disable.
If i don't extend the standard context menu, everything works well.

[wysota]

Wait a moment, where did you put the code snippet you pasted in the first post?

[cai]

Wait a moment, where did you put the code snippet you pasted in the first post?

Hi wysota,
The example is like this:


MainWindow::MainWindow()
{
...
createContextMenu()
connect(ui->textEdit,SIGNAL(customContextMenuRequest(const QPoint&)),this,SLOT(showContextMenu()));
...
}

void MainWindow::createContextMenu()
{
editContextMenu = ui->textEdit->createStandardContextMenu();
editContextMenu->addAction(clear);
ui->textEdit->setContextMenuPolicy(Qt::CustomContextMenu);
}

void MainWindow::showContextMenu()
{
if(editContextMenu)
editContextMenu ->exec(QCursor::pos());
}


Thanks for your reply:)

[wysota]

It should be:

MainWindow::MainWindow()
{
ui->textEdit->setContextMenuPolicy(Qt::CustomContextMenu);
connect(ui->textEdit,SIGNAL(customContextMenuRequest(const QPoint&)),
this,SLOT(showContextMenu(const QPoint &)));
}

void MainWindow::showContextMenu(const QPoint &pt)
{
QMenu *menu = ui->textEdit->createStandardContextMenu();
menu->addAction(clear);
menu->exec(ui->textEdit->mapToGlobal(pt));
delete menu;
}

[cai]

It should be:

MainWindow::MainWindow()
{
ui->textEdit->setContextMenuPolicy(Qt::CustomContextMenu);
connect(ui->textEdit,SIGNAL(customContextMenuRequest(const QPoint&)),
this,SLOT(showContextMenu(const QPoint &)));
}

void MainWindow::showContextMenu(const QPoint &pt)
{
QMenu *menu = ui->textEdit->createStandardContextMenu();
menu->addAction(clear);
menu->exec(ui->textEdit->mapToGlobal(pt));
delete menu;
}

Hi wysota,
Yes, it works well. But i still don't know why? Can you tell me?
thanks.

[wysota]

You were "pre-creating" the context menu and trying to reuse it with each context menu request but the menu and its actions are created based on the current state of the editor (the actions are not updated), so they didn't reflect any changes (such as selecting text) that happened after you called createStandardContextMenu().

[cai]

You were "pre-creating" the context menu and trying to reuse it with each context menu request but the menu and its actions are created based on the current state of the editor (the actions are not updated), so they didn't reflect any changes (such as selecting text) that happened after you called createStandardContextMenu().

I get it. Thanks for your help!

[oberlus]

Seems customContextMenuRequest has now been changed to customContextMenuRequested