SWT: Hyperlink in TableViewerColumn with MouseListener and correct column width - java-8

Question

I want to add a Hyperlink (or a text that is styled like a Hyperlink) in a TableViewerColumn Cell.
I tried this and this.
Summarize: I either get a clickable Hyperlink for which the text is cropped (the column width is too small) or I get a link that is not clickable (MouseListener missing, no cursor).
Both tries are making use of a StyledCellLabelProvider for the TableViewerColumn. The first try does this:
TableViewerColumn column = new TableViewerColumn(viewer, SWT.NONE);
column .getColumn().setText(TITLE);
column .setLabelProvider(new MyHyperlinkLabelProvider());
However, the text in the cell is cropped and I have no idea how to set the column width so that the text fits in the cell. I tried with using pack(), but it had no effect.
private final class MyHyperlinkLabelProvider extends StyledCellLabelProvider {
private MyHyperlinkLabelProvider() {
}
#Override
public void update(ViewerCell cell) {
TableItem item = (TableItem)cell.getItem();
String myText= "Hyperlink text, unfortunately cropped";
link = new MyHyperlink((Composite)cell.getViewerRow().getControl(), SWT.NONE);
toolkit.adapt(link);
link.setText(myText);
TableEditor editor = new TableEditor(item.getParent());
editor.grabHorizontal = true;
editor.grabVertical = true;
editor.setEditor(link, item, cell.getColumnIndex());
GridDataFactory.fillDefaults().applyTo(editor.getEditor());
editor.layout();
link.addMouseListener(new MouseAdapter() {
#Override
public void mouseUp(MouseEvent event) {
super.mouseUp(event);
if (event.getSource() instanceof MyHyperlink) {
MyHyperlink link = (MyHyperlink)event.getSource();
System.out.println("Label was clicked: " + link.getText());
}
}
});
super.update(cell);
}
}
private class MyHyperlink extends Hyperlink {
public MyHyperlink(Composite parent, int style) {
super(parent, style);
this.setUnderlined(true);
}
}
The less preferred alternative is given in the second link. If I cannot get the column width correct, I'd go with this.
The second link suggests to try it with StyledString instead of Hyperlink. The StyledString at least is shown in full width and the column has the correct width. However, you cannot add a MouseListener to a StyledString. Only on the table, but that doesn't help.
private final class MyHyperlinkLabelProvider extends StyledCellLabelProvider {
private MyHyperlinkLabelProvider() {
}
#Override
public void update(ViewerCell cell) {
TableItem item = (TableItem)cell.getItem();
String mytext= "This is the hyperlink text";
/* make text look like a link */
StyledString text = new StyledString();
StyleRange myStyledRange =
new StyleRange(0, phase.length(), Display.getCurrent().getSystemColor(SWT.COLOR_BLUE), null);
myStyledRange.underline = true;
text.append(mytext, StyledString.DECORATIONS_STYLER);
cell.setText(text.toString());
StyleRange[] range = {myStyledRange };
cell.setStyleRanges(range);
super.update(cell);
}
}

Answer 1

To have the column size computed correctly, the cell text has to be set. Although the Hyperlink is what should be displayed link.setText(myText); is not enough. cell.setText(myText) is needed, too.
One can see it in the second snippet, for which the column size is correct. It is because of the cell.setText() call.