There is no API per say that handles this properly. Search the knowledge base for "Signature" and examine the source code for the "Signature++" program. It is for Pre OS3.x versions. It will not work on newer versions but it will give you a good start on how everything correlates.
Create a gadget window, use the PenDown event to draw the pen-strokes in the window. Old OS versions stored bitmaps in contiguous memory. New OS no longer does that. So prior to saving Bitmap to database, copy to offscreen window and retrieve pointers to Bitmap Header - WinGetBitmap(), Color Table - BmpGetColortable(), Bitmap data - BmpGetBits(). Copy to temp memory contiguously and then write to database. I use BmpCompress() to compress the bitmap prior to storage so that it takes up little storage and then BmpCompress() again to restore the bitmap prior to displaying it onscreen. Lot of code for all this. But the signature++ example will get you started well. Hope this helps. Eddie "wax wacky" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > > Hi eddie , > I need to a similar kind of signature app. But i am new to palmOS programming...I have build few a apps. > Can u please tell me how to start for such kind of app. Which API will i need to use. > I would appreciate if u send me a sample code for this. > > bye > wax > > > My app accepts a signature and when saved within the application, the > bitmaps is stored into a database and all works well. > > When the user enters a signature and exits the application via the > silkscreen buttons (causing the appStop event to be generated) all regular > fields on the form are saved except the signature bitmap. > > When an appStop event is created, is the screen memory wiped out prior to > letting the application perform all necessary saving? > > On the frmClose event, I perform the winCreateOffscreenWindow and copy the > signature window into it so that I can perform the necessary items to > prepare it for storage. > > All the fields on the form are saved properly. The signature is stored > properly when the user presses the OK button to return to the main form. > Only when the user taps the silkscreen is the bitmap not stored. The fields > are ok too. > > Are my suspicions correct? > > Thx in advance!! > > Eddie > > > > -- > ______________________________________________ > IndiaInfo Mail - the free e-mail service with a difference! www.indiainfo.com > Check out our value-added Premium features, such as an extra 20MB for mail storage, POP3, e-mail forwarding, and ads-free mailboxes! > > Powered by Outblaze > -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
