A primitive Racket HyperCard clone, sort of.
Create a stack consisting of cards with drawings and buttons on them. Write code to run when buttons get clicked. Explore through the stacks you've created.
Right-click to change modes.
- explore (hand)
- buttons (crosshair)
- drawing (bullseye)
Buttons are invisible unless you're in "buttons" mode. Double-clicking
on a button gives you edit mode, where you can either give the button
a target card or write a function that takes the state and can return
a modification of it. Buttons only run the code if their action is set
to <code>, otherwise they only jump to the specified card.
Drawing is only straight lines for now.
Card Zero is where you start; it's a card that gets prepopulated with a self-hosted card listing/editing interface.
If you get lost at any point, control-0 will return you to card zero.
Control-s saves, and control-l loads.
Control-c clears background, control-b clears buttons, control-n creates cards.
See cooper/cooper.rkt for an overview of the structs used and the
contracts on their fields. State is tracked with the state struct
inside a box. Each mode defines a number of callback functions for
various event handling. Handlers take the current state (along with
event and canvas objects) and return a modified state.
Cards can have event handler functions attached to them. The card
listing is implemented on the zero card, which comes pre-populated
with an "enter" event handler that creates buttons pointing to all
the cards in the stack.
Copyright © 2014 Phil Hagelberg and contributors
Image above © 2014 Boom Entertainment, Inc.
Distributed under the GNU General Public License version 3; see file LICENSE.