[EMAIL PROTECTED] wrote:
>
> Hi,
>
> I've managed to populate a table, with two columns custom style, using a
> custom drawing function, and working scrollbars.
>
> The slight problem that remains is that the first time the table is drawn,
> the first row is scrambled while all subsequent rows are drawn correctly.
> More specifically, on the first line, the second column nearly entirely
> overwrites the first column. On the following lines, everything is OK.
>
> If I use the scrollbar, down and up again, the first row gets redrawn
> correctly.
>
> I have stepped with the integrated debugger into the code, and see that the
> first time the first row is drawn, the "bounds" structure that is
> automatically sent back to the custom drawing function holds a wrong value
> for the "topLeft.x" parameter. This is just "+1" with respect to the first
> columns X coordinate, instead of having the correct positioning for the
> second column.
>
> As I said, all following rows are correctly drawn, and if the entire table is
> redrawn for some reason, ex. scrolling, everything is OK too with the first
> row.
>
> Does anyone have an idea what may be the reason for this strange behavior? I
> tried to attach a screenshot, but my message got rejected because it had the
> attachment. (Why then offer the possibility of attaching files if it is
> rejected?...).
>
> Thanks for any suggestions!
>
> Anne-Marie
Hi Anne-Marie,
Does your table initialization start at row index 0? My table
initialization usually looks something like this:
void GroupFormTableInit(FormType *form) {
TableType *table;
Int16 irow;
/* Initialize table cells. */
table = (TableType *)ctrlPtr(form, GroupFormTable);
for (irow=0; irow<TableRows; irow++) {
TblSetRowHeight(table, irow, 12);
TblSetRowStaticHeight(table, irow, true);
TblSetItemStyle(table, irow, GroupFormAbbreviationColumn,
customTableItem);
TblSetItemStyle(table, irow, GroupFormNameColumn,
customTableItem);
TblSetItemStyle(table, irow, GroupFormCheckColumn,
checkboxTableItem);
}
/* Make columns visible. */
TblSetColumnUsable(table, GroupFormAbbreviationColumn, true);
TblSetCustomDrawProcedure(table, GroupFormAbbreviationColumn,
DrawCustomGroupAbbreviation);
TblSetColumnSpacing(table, GroupFormAbbreviationColumn, 0);
TblSetColumnUsable(table, GroupFormNameColumn, true);
TblSetCustomDrawProcedure(table, GroupFormNameColumn,
DrawCustomGroupName);
TblSetColumnSpacing(table, GroupFormNameColumn, 0);
TblSetColumnUsable(table, GroupFormCheckColumn, true);
TblSetColumnSpacing(table, GroupFormCheckColumn, 0);
}
Lonnon Foster's 'Palm OS Programming Bible' has a lot of helpful sample
code involving tables.
Greg
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