On Monday 20 October 2008 10.36:48 Graeme Geldenhuys wrote: > On Mon, Oct 20, 2008 at 10:19 AM, Martin Schreiber <[EMAIL PROTECTED]> wrote: > > [...] > > You could send a wakeup message to the X event queue if a widget has been > > invalidated instead of polling. See MSEgui lib/common/msegui.pas > > tguiapplication.invalidated and the postevent infrastructure for an > > example. > > Thanks Martin. I take it, your method would be a bit more efficient > than polling? Or wouldn't it make much difference because the event > loop keeps looping anyway? > The MSEgui main event loop waits on a poll() call for X messages. There is a emergency timeout of one second because the new xcb library seems to have a problem by sometimes not to deliver client messages in time.
> For example: Using the wakeup event, it will simply break out of the > message handling a bit quicker. "if XPending(display) > 0" would have > a "else" part where it fires the OnIdle event and then breaks out. > Skipping (or making redundant) the "if needToWait ..." block of code. > No, the purpose of the wakeup message is to terminate the poll() call. Updating the widgets and call of OnIdle will be done before poll() is called again. Martin _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
