PowerBuilder Classic 12.5 - Double buffering, Vertical Sync

Question

Since i have lots of controls(buttons,dropdowns, gridviews) on a single form, the drawing seems to lag when fetching data from db, or i notice some screen tearing/lag when the control gets data from database and are drawn.

Now i have done some graphics in java and c++ programming, and know that double buffering/vertical sync or whatever is needed does help allot, but have no clue how to do this in powerbuilder.

Anyone here with experience in powerbuilder classic, know how to do this? the programming language is powerscript.

Answer 1

I don't know about this, but another solution could be to set the redrawing your form until it is finished loading datas from the database. This way you could also avoid lag/flickr.

Function: SetRedraw Link: http://infocenter.sybase.com/help/index.jsp?topic=/com.sybase.infocenter.dc37783.1200/html/dwref/PSFSetRedrawdw.htm

Answer 2

Are the graphics loaded into a datawindow control? (check if the column has the 'display as bitmap' checkbox checked). You can experiment with the SetRedraw method to 'turn off' painting of the screen/control until all the data is loaded.