elm/libraries/Native/Signal/Mouse.js

51 lines
No EOL
1.7 KiB
JavaScript

Elm.Native.Mouse = {};
Elm.Native.Mouse.make = function(elm) {
elm.Native = elm.Native || {};
elm.Native.Mouse = elm.Native.Mouse || {};
if (elm.Native.Mouse.values) return elm.Native.Mouse.values;
var Signal = Elm.Signal.make(elm);
var Utils = Elm.Native.Utils.make(elm);
var position = Signal.constant(Utils.Tuple2(0,0));
position.defaultNumberOfKids = 2;
// do not move x and y into Elm. By setting their default number
// of kids, it is possible to detatch the mouse listeners if
// they are not needed.
var x = A2( Signal.lift, function(p){return p._0}, position);
x.defaultNumberOfKids = 0;
var y = A2( Signal.lift, function(p){return p._1}, position);
y.defaultNumberOfKids = 0;
var isDown = Signal.constant(false);
var isClicked = Signal.constant(false);
var clicks = Signal.constant(Utils.Tuple0);
var node = elm.display === ElmRuntime.Display.FULLSCREEN ? document : elm.node;
elm.addListener([isClicked.id, clicks.id], node, 'click', function click() {
elm.notify(isClicked.id, true);
elm.notify(clicks.id, Utils.Tuple0);
elm.notify(isClicked.id, false);
});
elm.addListener([isDown.id], node, 'mousedown', function down() {
elm.notify(isDown.id, true);
});
elm.addListener([isDown.id], node, 'mouseup', function up() {
elm.notify(isDown.id, false);
});
elm.addListener([position.id], node, 'mousemove', function move(e) {
elm.notify(position.id, Utils.getXY(e));
});
return elm.Native.Mouse.values = {
position: position,
x:x,
y:y,
isClicked: isClicked,
isDown: isDown,
clicks: clicks
};
};