Double buffer. Create a second table that is hidden. Fill it in. Hide first
and show second. Can either delete the old one or recycle it.
David Botton
On Sat, Jul 4, 2015 at 12:20 PM Björn Lundin b.f.lun...@gmail.com wrote:
Hi!
I got a page that is driven by a task that
updates 3 tables.
The tables are first set to with
View.Daily_Table.Inner_HTML ();
then a header row is created
View.Daily_Table.Add_Caption(Last week's result @
Calendar2.Clock.To_String(Milliseconds = False));
View.Daily_Table.Border;
declare
Row : Table_Row_Access := new Table_Row_Type;
Col1 : Table_Heading_Access := new Table_Heading_Type;
Col2 : Table_Heading_Access := new Table_Heading_Type;
Col3 : Table_Heading_Access := new Table_Heading_Type;
begin
Row.Dynamic;
Col1.Dynamic;
Col2.Dynamic;
Col3.Dynamic;
Row.Create (View.Daily_Table);
Col1.Create (Row.all, Betname);
Col2.Create (Row.all, Sum(Profit));
Col3.Create (Row.all, Date);
end;
and then the rows are added
Select_Daily_Profit.Open_Cursor;
loop
Select_Daily_Profit.Fetch(Eos);
exit when Eos;
Select_Daily_Profit.Get(BETNAME, Betname);
Select_Daily_Profit.Get(SUMPROFIT, Sumprofit);
Select_Daily_Profit.Get_Date(DATE, Date);
declare
Row : Table_Row_Access := new Table_Row_Type;
Col1 : Table_Column_Access := new Table_Column_Type;
Col2 : Table_Column_Access := new Table_Column_Type;
Col3 : Table_Column_Access := new Table_Column_Type;
begin
Cnt := Cnt +1;
Row.Dynamic;
Col1.Dynamic;
Col2.Dynamic;
Col3.Dynamic;
Row.Create (View.Daily_Table);
if Cnt mod 2 = Integer_4(0) then
Row.Background_Color(skyblue);
end if;
Col1.Create (Row.all, Utils.Trim(Betname));
Col2.Create (Row.all, Utils.F8_Image(Sumprofit));
if Sumprofit 0.0 then
Col2.Background_Color(red);
else
Col2.Background_Color(palegreen);
end if;
Col3.Create (Row.all, Date.String_Date_ISO);
Col2.Text_Alignment(Gnoga.Gui.Element.Right);
end;
end loop;
Select_Daily_Profit.Close_Cursor;
This pattern is repeated for 3 tables with different data.
Now - it works.
But you see the tables disappear and the reappear, somewhat slowly.
And it's a bit annoying, since it is a monitoring screen.
I'd like the update to be without flickering. Is there a better way of
updating tables?
--
Björn
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