Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!uunet!pcrat!rick
From: rick@pcrat.uucp (Rick Richardson)
Newsgroups: comp.windows.x.motif
Subject: Stretchable List
Message-ID: <1990Jul16.172955.11321@pcrat.uucp>
Date: 16 Jul 90 17:29:55 GMT
Organization: PC Research, Inc.
Lines: 97

I'm trying to make a Form that contains some buttons at the
top, and a scrollable list of things at the bottom.

If the User resizes the form, I want the scrollable list to change
size so that it fills the form completely, except for the area
occupied by the buttons at the top. E.G. I want the form to look
like this no matter how big or small the window is:

	+-------------------------+
	|	Button		  |
	+-------------------------+
	| Item N		^ |
	| Item N+1		| |
	| Item N+2		| |
	| Item N+3		v |
	| <-------------------->  |
	+-------------------------+

I've tried a couple things.  If I use a SelectionBox, the
list portion stretches automatically in the horizontal direction,
but not vertically.  Plus, I just want the list portion, anyhow.
If I used the SelectionBox, I'd want to tell it (somehow) to
make visibleItems variable, and forget the Text area and Buttons.

Using a ScrolledList, I can't get either dimension to stretch
with the form.  I fooled around alot with the policies.
PLUS, the widget positions itself *under* the button, as if
the button had 0 height, even though the attachment constraints
are the same as for the SelectionBox I tried.  That might be a bug.

Perhaps these widgets just aren't appropriate.  Perhaps I need
to use some callbacks.  Any suggestions will be gratefully
received.  I'm enclosing the (bare minimum) .uil file so you
can better see what I've tried.

All this is using Motif 1.0.

-Rick Richardson

module prototype
    version = 'v1.0'
    names = case_sensitive
    include file 'XmAppl.uil';

object ft_main : XmForm {
	controls {
		XmPushButton	button1;
		!
		! Comment out one or the other
		!
		XmSelectionBox	try_sel;
		! XmScrolledList	try_list;
	};
	arguments {
		XmNwidth = 300;
		XmNheight = 300;
	};
};

object button1 : XmPushButton {
	arguments { 
		XmNtopAttachment = XmATTACH_FORM;
		XmNleftAttachment = XmATTACH_FORM;
		XmNrightAttachment = XmATTACH_FORM;
	};
};

object try_selbox : XmSelectionBox {
	arguments { 
		XmNtopAttachment = XmATTACH_WIDGET;
		XmNtopWidget = XmPushButton button1;
		XmNleftAttachment = XmATTACH_FORM;
		XmNrightAttachment = XmATTACH_FORM;
		XmNbottomAttachment = XmATTACH_FORM;

		XmNlistVisibleItemCount = 5;
	};
};

object try_list : XmScrolledList {
	arguments { 
		XmNtopAttachment = XmATTACH_WIDGET;
		XmNtopWidget = XmPushButton button1;
		XmNleftAttachment = XmATTACH_FORM;
		XmNrightAttachment = XmATTACH_FORM;
		XmNbottomAttachment = XmATTACH_FORM;

		XmNvisibleItemCount = 5;
		XmNscrollBarDisplayPolicy = XmSTATIC;
		XmNlistSizePolicy = XmCONSTANT;
		XmNvisualPolicy = XmCONSTANT;
	};
};

end module;
-- 
Rick Richardson - PC Research, Inc., uunet!pcrat!rick, (201) 389-8963