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javaswttableviewer

Owner-draw table: detect whether actual cell is painted or hover

If you hover over a table cell which is too narrow, some kind of popup occurs. How can I detect in OwnerDrawLabelProvider.paint() whether the (truncated) table cell is painted or the popup?

Solution

  • Unfortunately, there seems to be no way to get this information directly from the Event. But we implemented following ways:

    • On Windows the popup is higher than the cell (tested on Windows 7 aero theme). This means, if event.height != event.gc.getClipping().height, the hover is painted.

    • On OS X the popup has the same size as the cell, but the Table has a field drawExpansion which is set to true when painting the hover. Just use reflection to read it.

    • SWT on Ubuntu does not even show any hover at all...