[news.eclipse.platform] Re: Eclipse ScrolledForm not scrolling.

[Kevin <k@xxxxxxxxxxxxxxxxxxx>]

I suffered many flicking problems with the ScrolledForm. First you 
should check the .reflow() method I think thats what you need know.
But if you have a content provider and it updates too often the form 
will be really ugly flicking, shaking, blinking while being updated, to 
avoid that I avoid calling .reflow() and I use this code I copied from 
somewhere else (pasted blow). Also, before using the ScrolledForm I used
a Scrolled composite with another composite inside and what I did to 
show the scrollbars was something like

control.setRedraw(false);
control.layout()
Point controlSize = control.computeSize(SWT.DEFAULT, SWT.DEFAULT);
control.setSize(controlSize);
scrolled.setMinSize(controlSize);
control.setRedraw(true);

where control is the composite inside the scrolled composite.
But in linux at least the eclipse IDE views with scrollbars also flick 
:(. may be is a gtk problem I dont know, looks bad.


check this too:
protected void reflow(Composite comp, boolean flushCache) {
		if(comp.isDisposed()) {
			return;
		}
		Composite c = comp;
		/*set redraw to false for every parent until reaching a scrolled*/
		while (c != null) {
			c.setRedraw(false);
			c = c.getParent();
			if (c instanceof ScrolledForm) {
				break;
			}
		}
		/* layout every parent until reaching a scrolled and reflowing it*/
		c = comp;
		while (c != null) {
			c.layout(true);
			c = c.getParent();
			if (c instanceof ScrolledForm) {
				((ScrolledForm) c).reflow(flushCache);
				break;
			}
		}
		/*set redraw to TRUE for every parent until reaching a scrolled*/
		c = comp;
		while (c != null) {
			c.setRedraw(true);
			c = c.getParent();
			if (c instanceof ScrolledForm) {
				break;
			}
		}
	}