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AutoScroll [message #439045]

Mon, 05 July 2004 19:27

Tobias Weih

Messages: 24
Registered: July 2009

Junior Member

hi,

assume you have a ScrollPane populated with a number of Widgets.
When traversing through them using the keyboard, I want the
ScrollPane to shift the visible rect, so the user always sees
the widget that has the focus.

any ideas how to approach this?

tobi

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Re: AutoScroll [message #439111 is a reply to message #439045]

Tue, 06 July 2004 04:38

Ryan

Messages: 34
Registered: July 2009

Member

Hi Tobi,

I was trying to do the exact same thing. Assuming you have all your
widgets in a single column (i.e. you will only traverse them using the
up/down arrow keys), try calling this method every time you press the
up/down arrow keys.

/*
* temp is the widget that has focus after the up/down key is pressed
* e indicates whether up or down was pressed
* sc is the ScrolledComposite
*/

void scrollContents(Widget temp, int e)
{

if (e == SWT.ARROW_DOWN)
{
Point pt = temp.getLocation();
Rectangle rect = sc.getClientArea();
Point widget = temp.getSize();
sc.setOrigin(temp.getLocation().x, pt.y - (rect.height - widget.y));
}
else if (e == SWT.ARROW_UP) sc.setOrigin(temp.getLocation());

}

Hope this helps!

Ryan

Tobias Weih wrote:

> hi,

> assume you have a ScrollPane populated with a number of Widgets.
> When traversing through them using the keyboard, I want the
> ScrollPane to shift the visible rect, so the user always sees
> the widget that has the focus.

> any ideas how to approach this?

> tobi

Report message to a moderator

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