On 9/1/06, Richard Coutts <[EMAIL PROTECTED]> wrote:
>> I'm porting my app to WM5 and am having trouble finding the
>> equivalent
>> to WinSaveBits and WinRestoreBits so that I can save a rectangular
>> area of the screen and then restore it. If someone could enlighten
>> me, it would be much appreciated.
>
> BitBlt() - create an offscreen window, get a drawing context.
>
> its probably more work than you need - are you sure you actually
> need
> these routines? if your porting all forms to native windows as well;
> the
> os routines may autiomagically provide this
> --
> // Aaron Ardiri
Thanks Aaron. So, the windows forms should provide the blitting for
me? My main form has a drawing area where lines, circles, arcs, etc.,
are drawn to the window. Right now, when a Windows "child" form is
created, it fullscreen and hide the main form. When its destroyed,
the mainforms widgets are all refreshed, but the lines, arcs, etc.,
are gone.
anything you draw on top of the form you need to draw yourself.
palmos posts a frmUpdateEvent when it requests that the user should
update their form. ms mobile does something similar; but, its more
along the lines of posting a WM_PAINT event - in which you can
get a graphics context and put everything you need on the screen.
--
// Aaron Ardiri
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