On Windows, put skins in the same directory where the Free42 executable is located, or in %APPDATA%\Free42. On Mac, put skins in $HOME/Library/Application Support/Free42. On Linux, put the skins in $HOME/.free42/. On Android, put the skins wherever you like. Remember the location, and, in Free42, choose Main Menu -> Skin: Other, and use the file selection dialog to locate and select the desired skin's layout file. To use these skins with Free42 on iPhone or iPod touch, you must upload them to the device. This is done as follows: on the device, run Free42. Tap in the top part of the display to bring up the main menu. In the menu, select "Program Import & Export", and in the next menu, select "HTTP Server". You should now see a message like "The HTTP server is running at: http://ipod:9090/". On your PC or Mac, open a browser window, and point it at the URL shown on the iPhone or iPod (the "http://ipod:9090/" in the example above). You should see a listing containing three directories, named "config", "memory", and "skins". Select "skins", and in the next page (it should say "Index of /skins/" at the top), upload the *.layout and *.gif files for the skins you want to use, one file at a time: click the Browse button, select the file, click OK, then click Submit. Once you are finished uploading, click Done in the HTTP Server window on the iPhone or iPod. Your new skins will now be available in the Select Skin submenu of the main menu. ------------------------------------------------------------------------------- Free42 skin description (*.layout) file format: Anything from a '#' until the end of the line is a comment Non-comment lines contain the following information: (Note: the skin bitmap is assumed to have the same filename as the skin description, with the 'layout' extension replaced by 'gif'.) (Note: rectangles are given as "x,y,width,height"; points are "x,y".) Skin: the portion of the skin bitmap to be rendered as the actual faceplate Display: describes the location, size, and color of the display; arguments are: top-left corner, x magnification, y magnification, background color, foreground color. Colors are specified as 6-digit hex numbers in RRGGBB format. Key: describes a clickable key; arguments are: keycode, sensitive rectangle (i.e. the rectangle where mouse-down events will cause the key to be pressed), display rectangle (i.e. the rectangle that changes when a key is pressed or released), and the location of the top-left corner of the active- state bitmap (since the active-state bitmap must have the same size as the display rectangle, only its position, not its width and height, are specified). Keycodes in the range 1..37 correspond to actual calculator keys; keycodes 38..255 can be used to define "macro" keys. For each such keycode, there must be a corresponding "Macro:" line in the layout file. You may specify two keycodes (two numbers separated by a comma); if you do, the first is used when the calculator's shift (indicated by the shift annunciator) is inactive, and the second is used when the calculator's shift is active. This feature allows you to have a key's shifted function be something different than it is on the original HP-42S keyboard. Macro: for keys with keycodes in the range 38..255, this defines the sequence of HP-42S keys (keycodes 1..37) that is to be pressed; arguments are: keycode, followed by zero or more keycodes in the range 1..37. See below for an example. Annunciator: describes an HP-42S annunciator; arguments are: code (1=updown, 2=shift, 3=print, 4=run, 5=battery, 6=g, 7=rad), display rectangle, and the location of the top-left corner of the active-state bitmap. For examples, look at the *.layout and *.gif files in this directory. Macro example: To define a key for the FIX command, using key code 38: the sequence of calculator keys for FIX is Shift (28), E (16), Sigma+ (1), so... Key: 38 <sens_rect> <disp_rect> <active_pt> Macro: 38 28 16 1 You can also define PC keyboard mappings in the *.layout file. The syntax is identical to that of the keymap file, preceded by a tag that indicates the target platform: WinKey for Windows, MacKey for Mac, and GtkKey for Linux and other Unix-like environments. It is necessary to specify which platform each key mapping is for, since the key codes are platform-dependent. If a layout file defines a mapping for a key that is also mapped in the keymap file, the skin-specific mapping takes precedence. Note that, while Macro definitions may only contain codes 1..37, a keyboard mapping may contain codes 38..255 as well, so you could theoretically map a PC keyboard key to a sequence of macros. This is not recommended, however; for clarity, it is probably better for key mappings to consist only of one key or macro number, preceded by Shift (28) if necessary. This will also allow Free42 to match the PC keyboard key to a skin-defined key, which will be highlighted for visual feedback when the mapping is activated.
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