QTableWidget right click menu

[stefan]

Hi.
Im starting to use Qt, and after installation/building/starting_project probelm i have a problem for which i can't find solution searching the forums..

I need to add a (right mouse button click) menu to QTableWidget, but i can't get it working.

frmSettings::frmSettings(QWidget *parent)
    : QDialog(parent)
{
	ui.setupUi(this);
 
	context= new QMenu(this);
	context->addAction("Add");
	context->addAction("Delete");
 
	connect(ui.tableOptimizationVariables, SIGNAL(customContextMenuRequested(QPoint* position)), SLOT(frmSettings::ProvideContexMenu(position))); 
}
void frmSettings::ProvideContexMenu(const QPoint* position)
{
	context->exec(*position);
}

frmSettings::frmSettings(QWidget *parent)
    : QDialog(parent)
{
	ui.setupUi(this);

	context= new QMenu(this);
	context->addAction("Add");
	context->addAction("Delete");
	
	connect(ui.tableOptimizationVariables, SIGNAL(customContextMenuRequested(QPoint* position)), SLOT(frmSettings::ProvideContexMenu(position))); 
}
void frmSettings::ProvideContexMenu(const QPoint* position)
{
	context->exec(*position);
}

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tableOptimizationVariables is QTableWidget

Thanx

[jpn]

You cannot put variable names but just types inside SIGNAL() and SLOT() macros and there is no such signal as QWidget::customContextMenuRequested(QPoint*). It's a reference, not a pointer.

So it should be:

connect(ui.tableOptimizationVariables, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(ProvideContexMenu(const QPoint&)));

connect(ui.tableOptimizationVariables, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(ProvideContexMenu(const QPoint&)));

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Also, did you switch the context menu policy to Qt::CustomContextMenu?

[stefan]

thank you, but its not working.
Yes ContextMenuPolicy was set to CustomContextMenu in .ui file. I treid to do this in constructor but without success:

frmSettings::frmSettings(QWidget *parent)
    : QDialog(parent)
{
	ui.setupUi(this);
 
	context= new QMenu(this);
	context->addAction("Add");
	context->addAction("Delete");
	ui.tableOptimizationVariables->setContextMenuPolicy(Qt::CustomContextMenu);
//	connect(ui.tableOptimizationVariables, SIGNAL(customContextMenuRequested(QPoint* position)),frmSettings, SLOT(ProvideContexMenu(position))); 
	connect(ui.tableOptimizationVariables, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(ProvideContexMenu(const QPoint&)));
}
void frmSettings::ProvideContexMenu(const QPoint* position)
{
	context->exec(*position);
}

frmSettings::frmSettings(QWidget *parent)
    : QDialog(parent)
{
	ui.setupUi(this);

	context= new QMenu(this);
	context->addAction("Add");
	context->addAction("Delete");
	ui.tableOptimizationVariables->setContextMenuPolicy(Qt::CustomContextMenu);
//	connect(ui.tableOptimizationVariables, SIGNAL(customContextMenuRequested(QPoint* position)),frmSettings, SLOT(ProvideContexMenu(position))); 
	connect(ui.tableOptimizationVariables, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(ProvideContexMenu(const QPoint&)));
}
void frmSettings::ProvideContexMenu(const QPoint* position)
{
	context->exec(*position);
}

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Can somebody give me complete code (it shoud be couple of lines) for calling context menu? Is it diferent for different controls? Maybe some QTableWidget-specific stuff must be done?

//LATER ADDED TEXT

I tried to link contect menu to QLineEdit control (to see if default copy/cut/paste menu is invoked):

ui.tableOptimizationVariables->setContextMenuPolicy(Qt::CustomContextMenu);
	ui.txtName->setContextMenuPolicy(Qt::CustomContextMenu); 
	connect(ui.tableOptimizationVariables, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(ProvideContexMenu(const QPoint&)));
	connect(ui.txtName, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(ProvideContexMenu(const QPoint&)));

ui.tableOptimizationVariables->setContextMenuPolicy(Qt::CustomContextMenu);
	ui.txtName->setContextMenuPolicy(Qt::CustomContextMenu); 
	connect(ui.tableOptimizationVariables, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(ProvideContexMenu(const QPoint&)));
	connect(ui.txtName, SIGNAL(customContextMenuRequested(const QPoint&)), SLOT(ProvideContexMenu(const QPoint&)));

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So i lost "Copy/Cut/Paste/|/Select All" menu, which mean that context menu is set to custom? But when i debugged I noticed that slot void frmSettings::ProvideContexMenu(const QPoint* position) is never entered. What am I doing wrong?

[jpn]

You forgot to adjust frmSettings::ProvideContexMenu(). It still takes a pointer.

The easiest way to construct a context menu is to use Qt::ActionsContextMenu. All it takes is to add actions via QWidget::addAction() and the menu is constructed automatically for you:

setContextMenuPolicy(Qt::ActionsContextMenu);
QAction* fooAction = new new QAction("foo");
QAction* barAction = new new QAction("bar");
connect(fooAction, SIGNAL(triggered()), this, SLOT(doSomethingFoo()));
connect(barAction, SIGNAL(triggered()), this, SLOT(doSomethingBar()));
addAction(fooAction);
addAction(barAction);

setContextMenuPolicy(Qt::ActionsContextMenu);
QAction* fooAction = new new QAction("foo");
QAction* barAction = new new QAction("bar");
connect(fooAction, SIGNAL(triggered()), this, SLOT(doSomethingFoo()));
connect(barAction, SIGNAL(triggered()), this, SLOT(doSomethingBar()));
addAction(fooAction);
addAction(barAction);

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[stefan]

You forgot to adjust frmSettings::ProvideContexMenu(). It still takes a pointer.

YES! thank you. I'm used to .NET warnings for every litle thing.. so im kinda strugling with QT..
Replies on my post where fast and exact nice forum guys!

[jpn]

YES! thank you. I'm used to .NET warnings for every litle thing.. so im kinda strugling with QT..

Signal slot connections are established at run time, that's why there is no error/warning at compilation time. Notice that QObject::connect() outputs a detailed warning in the debug output in case establishing the connection fails.

Replies on my post where fast and exact nice forum guys!

Thanks, you're welcome.