I have played around a bunch with the page size. I have set it to one and
also 14 which is the number of lines in the field. I have set min to 0 and
max to the number of lines in the field so the value of 14 makes the most
sense to me but for some reason that didn't work.
On 7/17/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
>
> Hmm, I dunno. Maybe the pagesize is too high? Thus it would jump from
> beginning to end (and vice versa) in one click.
>
> ----- Original Message ----
> From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
> To: Palm Developer Forum <palm-dev-forum@news.palmos.com>
> Sent: Monday, July 16, 2007 11:12:10 AM
> Subject: Scrolling Fields
>
> I'm trying to set up a field in my application that works with a scroll
> bar. I have everything laid out but I am having trouble getting the field to
> respond to changes in the scrollbar. The field just stays put or jumps all
> the way to the end or the beginning when I attempt to move the scrollbar.
> When I move through and edit the field the scrollbar responds perfectly it
> just doesn't work the other way around. Here is the function that I call
> when I receive the SclRepeatEvent.
>
> Boolean MainForm::updateField(Int16 oldpos, Int16 newpos, struct
> ScrollBarType * bar)
> {
> struct FormType * frmP = FrmGetFormPtr(Messages);
> FieldType *field;
> UInt16 fieldIndex;
> fieldIndex = FrmGetObjectIndex(myForm, Messages);
> field = (FieldType *)FrmGetObjectPtr(myForm, fieldIndex);
> UInt16 scrollPos = 0;
> UInt16 textHeight = 0;
> UInt16 fieldHeight = 0;
> UInt16 maxValue = 0;
> const char * myChars = FldGetTextPtr(field);
> fieldHeight = FldCalcFieldHeight(myChars, 140);
> Int16 minimum = 0;
> Int16 maximum = 0;
> Int16 value;
> Int16 pageSize;
> UInt16 linesToScroll = (UInt16) newpos - oldpos;
> WinDirectionType direction = winUp;
> if(linesToScroll<0)
> {
> linesToScroll = -1 * linesToScroll;
> direction = winDown;
> }
> FldScrollField (field, linesToScroll,direction);
> // Update the scroll bar.
> SclGetScrollBar (bar, &value, &minimum, &maximum, &pageSize);
> if (direction == winUp)
> {
> value -= (Int16) linesToScroll;
> }
> else
> {
> value += (Int16) linesToScroll;
> }
> SclSetScrollBar (bar, value, (Int16) 0, (Int16) fieldHeight,
> pageSize);
> return true;
> }
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>
>
>
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