106 lines
No EOL
3.1 KiB
JavaScript
106 lines
No EOL
3.1 KiB
JavaScript
/*! Mouse
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!*/
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Elm.Mouse = function() {
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/*[Position]*/
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/** position : Signal (Int,Int)
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The current mouse position.
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**/
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var position = Elm.Signal.constant(Value.Tuple(0,0));
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position.defaultNumberOfKids = 2;
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/** x : Signal Int
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The current x-coordinate of the mouse.
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**/
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var x = Elm.Signal.lift(function(p){return p[1];})(position);
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x.defaultNumberOfKids = 0;
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/** y : Signal Int
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The current y-coordinate of the mouse.
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**/
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var y = Elm.Signal.lift(function(p){return p[2];})(position);
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y.defaultNumberOfKids = 0;
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/*[Button Status]*/
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/** isDown : Signal Bool
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The current state of the left mouse-button.
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True when the button is down, and false otherwise.
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**/
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var isDown = Elm.Signal.constant(false);
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/** isClicked : Signal Bool
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True immediately after the left mouse-button has been clicked,
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and false otherwise.
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**/
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var isClicked = Elm.Signal.constant(false);
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/** clicks : Signal ()
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Always equal to unit. Event triggers on every mouse click.
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**/
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var clicks = Elm.Signal.constant(Value.Tuple());
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function getXY(e) {
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var posx = 0;
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var posy = 0;
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if (!e) e = window.event;
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if (e.pageX || e.pageY) {
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posx = e.pageX;
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posy = e.pageY;
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} else if (e.clientX || e.clientY) {
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posx = e.clientX + document.body.scrollLeft +
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document.documentElement.scrollLeft;
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posy = e.clientY + document.body.scrollTop +
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document.documentElement.scrollTop;
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}
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return Value.Tuple(posx, posy);
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}
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Value.addListener(document, 'click', function(e) {
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var hasListener1 = Dispatcher.notify(isClicked.id, true);
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var hasListener2 = Dispatcher.notify(clicks.id, Value.Tuple());
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Dispatcher.notify(isClicked.id, false);
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if (!hasListener1 && !hasListener2)
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this.removeEventListener('click',arguments.callee,false);
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});
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Value.addListener(document, 'mousedown', function(e) {
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var hasListener = Dispatcher.notify(isDown.id, true);
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if (!hasListener)
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this.removeEventListener('mousedown',arguments.callee,false);
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});
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Value.addListener(document, 'mouseup', function(e) {
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var hasListener = Dispatcher.notify(isDown.id, false);
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if (!hasListener)
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this.removeEventListener('mouseup',arguments.callee,false);
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});
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Value.addListener(document, 'mousemove', function(e) {
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var hasListener = Dispatcher.notify(position.id, getXY(e));
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if (!hasListener)
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this.removeEventListener('mousemove',arguments.callee,false);
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});
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/** isClickedOn : Element -> (Element, Signal Bool)
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Determine whether an element has been clicked. The resulting pair
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is a signal of booleans that is true when its paired element has
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been clicked. The signal is True immediately after the left
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mouse-button has been clicked, and false otherwise.
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**/
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var clickedOn = function(elem) {
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var node = Render.render(elem);
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var click = Elm.Signal.constant(false);
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Value.addListener(node, 'click', function(e) {
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Dispatcher.notify(click.id, true);
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Dispatcher.notify(click.id, false);
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});
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return Value.Tuple(Value.wrap(node), click);
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};
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return {position: position,
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x:x,
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y:y,
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isClicked: isClicked,
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isDown: isDown,
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clicks: clicks,
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isClickedOn: clickedOn
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};
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}(); |