I’m using Pixi JS and detecting the mouse position via a simple event handler:
... var stage = new PIXI.Container(); stage.interactive = true; var handler = function(e){ mouseX = renderer.plugins.interaction.mouse.global.x; mouseY = renderer.plugins.interaction.mouse.global.y; } stage.on("pointermove", handler); ...
However mouseX
and mouseY
are being updated when the mouse is outside of the stage bounds (the <canvas>
element on the page). Is it possible to limit the mousemove
event to within the stage?
I’ve tried stage.hitArea
but that didn’t work.
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Answer
This seems to be the intended behavior; calling the mousemove callback even when the mouse pointer is outside of the container is necessary for implementing certain things, for example drag&drop.
But you can keep track of whether the pointer is above the object using mouseover
and mouseout
events like this:
... var graphics = new PIXI.Graphics(); graphics.hitArea = new PIXI.Rectangle(0, 0, 100, 100); graphics.interactive = true; stage.addChild(graphics); ... var mouseIn = false; graphics.on("mouseover", function(e) { console.log("over") mouseIn = true; }); graphics.on("mouseout", function(e) { console.log("out"); mouseIn = false; }); graphics.on("mousemove",function(e) { if (mouseIn) { console.log("mouse move inside", e) } });
(NOTE: I couldn’t get mouseout
and mouseover
events firing on the stage object – but apparently you should only add child elements to the stage and interact with them. Also, the hitArea
is necessary.)
This JSFiddle should demonstrate this idea, see the console output: http://jsfiddle.net/qc73ufbh/
It really seems to be feature rather than a bug, checkout these closed issues on this topic: https://github.com/pixijs/pixi.js/issues/2310 and https://github.com/pixijs/pixi.js/issues/1250