🚀 go-pugleaf

Is there some issue setting the initial value of scrollbars? Maybe a problem with negative minimum values?

I am building a dialog in which the user can choose a value between -90 and +90 from a scrollbar. The scrollbar "sb1" has an edit box showing its current value.

When I run the dialog and click the slider's step arrows, the slider's valued is incremented but starting at 0, rather than at -50 as set when it was created. Code below.

Any ideas?

John

var dlg = new Window ('dialog', 'Layer settings', [100,100,670,270])
dlg.msgPnl = dlg.add('panel', [10,20,550,160], 'Angles of slices');
//bunch of variables : there are more scrollbars in actual script
var btnHeight = 20 ;
var r1 = 30 ;
var r3 = 20 ;
var r2 = r3 + btnHeight * 1.5 ;
var r4 = 100 ;
var c1 = 20;
var w = 100;

btn1 = dlg.msgPnl.add ('button', [c1+w*4,r4,c1+w*5,r4+btnHeight], '&OK' , {name:'OK'});
sb1 = dlg.msgPnl.add ('scrollbar', [c1,r3,c1+w,r3+btnHeight], -50,-90,90);
sb1.onChange = function () {txt1.text = this.value;} ;
sb1.value = -50;
txt1 = dlg.msgPnl.add ('edittext', [w/2,r2,w/2+30,r2+btnHeight], sb1.value);
btn1.onClick = function () {this.parent.parent.close(); } ;
dlg.show();