[news.eclipse.platform.swt] Context menu position

["Markus Gieser" <markus.gieser@xxxxxxxxxxxxxx>]

Hi All!

I hope that the SWT newsgroup ist the right place for my problem:

I have a SWT Table in a Eclipse property tab / section. Now I'm trying to 
show a context menu on that table.

So I have a composite and added a table on it:
table = this.getWidgetFactory().createTable(parent, SWT.FULL_SELECTION | 
SWT.MULTI);

Then I added a menu on the table and some menu items to the menu:
tableMenu = new Menu(table);

MenuItem addItem = new MenuItem(tableMenu, SWT.POP_UP);

...

Additionally I already found an article describing the fact that the mouse 
position the MouseEvent returns is relative to the composite the menu 
belongs to (so the table in my case). So I found the following "algorithm" 
to get the absolute mouse position:

table.addMouseListener(new MouseAdapter() {

@Override

public void mouseDown(MouseEvent e) {

super.mouseDown(e);

if (e.button == 3) {

int x = e.x + table.getLocation().x;

int y = e.y + table.getLocation().y;

Composite parent = table.getParent();

while (parent != null) {

x = x + parent.getLocation().x;

y = y + parent.getLocation().y;

parent = parent.getParent();

}

tableMenu.setLocation(x, y);

tableMenu.setVisible(true);

}

}

});

Unfortunately there is still a difference in the x as well as in the y 
coordinates. Debugging it shows this difference but no real reason for that 
difference. Any ideas out there? Or is there perhaps a better solution and 
I'm just on the wrong track?



Best regards,

Markus