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- ********************************************************************
- * *
- * Scribble 1.6 *
- * *
- * by Andrew Howlett, howlett@iosphere.net *
- * based on code by Darrin Massena *
- * *
- * Freeware, 5 January 1997 *
- * *
- ********************************************************************
-
- DESCRIPTION
-
- Scribble turns the 160x160 pixel LCD panel into a simple notepad,
- upon which you can scribble names, telephone numbers, etc. Scribble,
- with one page of data, occupies less than 5k of RAM.
-
- Scribble saves the screen when you exit the app and restores it
- when you relauch the app. Enter 'C' on the graffiti writing area
- to clear the display (or choose clear from the menu).
-
- Scribble supports multiple pages, stored in a PalmOS database. Enter
- 'N' on the graffiti writing area to create a new page. Use the graffiti
- forward stroke (space) and back stroke (backspace) to go forward or
- backward a page. 'R' will remove the page. A number in the bottom right
- corner tells you which page you're on.
-
- Scribble will not tell you if an error occurs - dialog boxes cost RAM.
- For instance if you try to create a new page but don't have enough memory,
- it will just ignore you.
-
- MEMORY REQUIREMENTS
-
- Scribble occupies only 2048 bytes of memory, however each database
- record (that is, each page) uses 2840 bytes of dynamic heap. Therefore
- the minimum RAM requirement is about 5k.
-
- Pilot will load if you have 2k free, but it will crash if you have less
- than 5k (it has to be able to create at least one database record).
-
- WHAT'S THE DIFFERENCE BETWEEN SCRIBBLE AND DINKY PAD
-
- Dinky Pad is better. Dinky Pad is bigger. To fit Dinky Pad on my Pilot
- 1000 I would have to delete Chess :-(
-
- SOURCE CODE
-
- Source code is included for your amusement. Source files are:
-
- Scribble.asm PILA asm file
- Scribble.rcp PILRC resource file
- Scribble.bmp Icon
- Make.bat batch file to make prc
-
- The code was formatted for a 100 column editor using 8 space tabs.
- Debug code was left in the asm file but commented out.
-
- How does it work? Scribble is very simple coding. Scribble catches
- PenDownEvent, PenMoveEvent, and PenUpEvent. For PenDownEvent, it
- stores the X,Y coordinates in lastX and lastY. For PenMoveEvent and
- PenUpEvent it draws a line from (lastX,lastY) to (X,Y) and then stores
- X,Y in lastX,lastY. To save the screen, scribble creates a database
- called ScribbleDB and stores LCD memory, from $6518 to $7030,
- in a database record. Each Scribble page shows up as a Scribble record
- in the Memory ap.
-
- Notice that it starts the LCD screen at $6518, not $63b0. The first 18
- lines (360 bytes) of the LCD display are used by the form title bar.
- By starting at $6518 scribble doesn't overwrite the title bar drawn by
- frmDrawForm.
-
- When you leave Scribble it stores your current page in the application
- preferences database. When you launch scribble, it gets the most recent
- page from the application preferences database.
-
- The Creator ID for scribble is 'Scrb'. It's registered to me from
- Palm Computing. If you modify this code, make sure you get your own
- Creator ID before distributing. You can get a Creator ID from
- "Developer Support <devsupp@palm.com>".
-
- I enjoy talking about PILA coding. Please send email if you have
- questions or comments.
-
- Merry Christmas & Happy New Year,
- Andrew Howlett
- howlett@iosphere.net
- 3 January 1997
-
- **************************
- * *
- * MODIFICATIONS *
- * *
- **************************
-
- 30 Dec 96, Version 1.1
-
- Removed Graffitistateindicator 0 150 from form 1000.
-
- 3 Jan 97, Version 1.5
-
- Created ScribbleDB, multipage, page number.
-
- 5 Jan 97, Version 1.6
-
- Fixed bottom of page random lines bug.