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Setting visible items count in Combo dynamically [message #541329]

Sun, 20 June 2010 07:24

Supreetha H R

Messages: 2
Registered: June 2010

Junior Member

We have a requirement to set the visible items count in combo dynamically depending on the screen resolution and the size. So that the visible items in the combo will always fit in the screen with both the ends of the combo visible with scroll buttons. Can anyone tell me if this could be done and how?

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Re: Setting visible items count in Combo dynamically [message #541729 is a reply to message #541329]

Tue, 22 June 2010 11:07

Lakshmi P Shanmugam

Messages: 279
Registered: July 2009
Location: India

Senior Member

Hi Supreetha,

You could compute the number of items and set it to the combo using setVisibleItemCount().

You can do something like this:
Rectangle rect = display.getClientArea();
int itemCount = rect.height/combo.getItemHeight();
combo.setVisibleItemCount(itemCount);

If you want the dropdown items to be shown only below the combo then you can compute it based on the position of the combo.
Point point = display.map(null, combo, rect.width, rect.height);
itemCount = (point.y - combo.getTextHeight())/combo.getItemHeight();

HTH,

Lakshmi P Shanmugam

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