How do I make a canvas move via arrow keys being pressed? Also, how do I go to another card when the canvas is in a certain position. Do I need a grid to be able to do both of these things?
19 days ago(+1)
When the arrow keys are pressed, a navigate[] event is sent to the current card with an argument of "up", "down", "left", or "right". If you wanted to make these events move a canvas, you might have an event handler in the card-level script something like
on navigate dir do
deltas:("up","down","left","right") dict ((list 0,-1),(list 0,1),(list -1,0),(list 1,0))
myCanvas.pos:myCanvas.pos+deltas[dir]*32
end
If you wanted that canvas to trigger "exits" when it matches certain positions, you could mark them with buttons (perhaps set to "Show None") and then send them a "click" event on an overlap; the buttons could in turn go[] to other cards, trigger alert boxes, etc.
on navigate dir do
deltas:("up","down","left","right") dict ((list 0,-1),(list 0,1),(list -1,0),(list 1,0))
myBug.pos:myBug.pos+deltas[dir]*32
each button in extract value where value..type="button" from card.widgets
if button.pos~myBug.pos button.event["click"] end
end
end
For a fully-worked example of a game that uses arrow keys for tile-based movement, you should take a look at Decker Sokoban.