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Bug 85328

Summary:	Tooltips on a Canvas always displayed outside of the control
Product:	[Eclipse Project] Platform	Reporter:	Billy Biggs <billy.biggs>
Component:	SWT	Assignee:	Steve Northover <snorthov>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	eclipse.felipe, snorthov, trevor.campbell
Version:	3.1
Target Milestone:	---
Hardware:	PC
OS:	Linux-GTK
Whiteboard:

Description Billy Biggs

2005-02-15 16:15:39 EST

Run the following code.  The tooltip is always displayed outside of the widget,
even if this is really far away from where the cursor is.  On Windows, the
tooltip is always displayed near the mouse location.

This is not really a bug in GTK+, as this is the intended behaviour given how
tooltips are used on toolbars and other buttons in GTK+.  However, this probably
is not correct for Canvas.  Also see this GTK+ bug:

  http://bugzilla.gnome.org/show_bug.cgi?id=62174

public static void main(String [] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    Canvas canvas = new Canvas(shell, SWT.NONE);
    canvas.setToolTipText("This is a tooltip");
    shell.open();
    while(!shell.isDisposed()) {
        if(!display.readAndDispatch()) display.sleep();
    }
    display.dispose();
}

Comment 1 Steve Northover

2005-02-16 12:08:51 EST

Billy, how do you want to address this?  What about the hack to move the 
widget when it is shown?

Comment 2 Billy Biggs

2005-04-03 20:53:51 EDT

*** Bug 90125 has been marked as a duplicate of this bug. ***

Comment 3 Silenio Quarti

2006-02-01 14:15:18 EST

Steve, haven't you fixed this?

Comment 4 Steve Northover

2006-02-01 14:18:13 EST

Fixed > 20060201

Comment 5 Steve Northover

2006-02-01 14:18:22 EST

FIXED

Comment 6 trevor campbell

2006-02-23 23:10:28 EST

Great work.  I've tested this now and it works mostly as expected.

There is a small glitch which is probaly not worth doing anything about, but when the tooltip text is changed from one value to another there is a flicker as the tooltip jumps to the base of the composite and is then immediatly repositioned.

There is probably a simple workaround of setting the tooltip to null and then to the new value, although I have not tried this yet.

Comment 7 Steve Northover

2006-02-24 09:54:23 EST

FH is working in this area and may be able to fix this.

Comment 8 trevor campbell

2006-03-01 04:10:20 EST

I have now tested "a simple workaround of setting the tooltip to null and then
to the new value".

This worked fine.  
(I aplogise it took so long,  but this is not for work but for fun and there is always to much to do)

Comment 9 Steve Northover

2006-03-01 09:35:02 EST

FH, can you see the flicker that Trevor is talking about?  If Trevor can work around it outside of SWT, we should be able to fix it within the toolkit.