JQuery zooms in and out with jerks instead of smooth

Question

I have a canvas. I have to zoom in and out until the zoom button is pressed and down until the zoom out button is pressed. I managed to get it to work, but it works with delays. and it continues to zoom in or out even when I released the button. This is what I have tried so far. Please help me. You can check it out on the website here .

<script language="javascript">
    var timeout, clicker = $('#zoomin'),
        clicker2 = $('#zoomout');

    clicker.mousedown(function() {
        timeout = setInterval(function() {
            var wd = $("#canvas").width();
            var ht = $("#canvas").height();
            wd = parseInt(wd) + 250;
            ht = parseInt(ht) + 250;
            $("#canvas").animate({
                width: wd,
                height: ht
            });
            var ctx = canvas.getContext("2d");
            ctx.drawImage(backgroundImage, 0, 0, wd - 1, ht - 1);
            ctx.drawImage(outlineImage, 0, 0, wd - 1, ht - 1);
            redraw();
        }, 500);

        return false;
    });

    clicker2.mousedown(function() {
        timeout = setInterval(function() {
            var wd = $("#canvas").width();
            var ht = $("#canvas").height();
            wd = parseInt(wd) - 250;
            ht = parseInt(ht) - 250;
            if (wd < 500) {
                return false;
            }
            $("#canvas").animate({
                width: wd,
                height: ht
            });
            var ctx = canvas.getContext("2d");
            ctx.drawImage(backgroundImage, 0, 0, wd - 1, ht - 1);
            ctx.drawImage(outlineImage, 0, 0, wd - 1, ht - 1);
            redraw();
        }, 500);

        return false;
    });

    $(document).mouseup(function() {
        clearInterval(timeout);
        return false;
    });

    $("#zoomout").mousedown(function() {
        var wd = $("#canvas").width();
        var ht = $("#canvas").height();
        wd = parseInt(wd) - 250;
        ht = parseInt(ht) - 250;
        if (wd < 500) {
            return false;
        }
        $("#canvas").animate({
            width: wd,
            height: ht
        });
        var ctx = canvas.getContext("2d");
        ctx.drawImage(backgroundImage, 0, 0, wd - 1, ht - 1);
        ctx.drawImage(outlineImage, 0, 0, wd - 1, ht - 1);
        redraw();
        console.log(wd + ":" + ht);
    });

    $("#zoomin").click(function() {
        var wd = $("#canvas").width();
        var ht = $("#canvas").height();
        wd = parseInt(wd) + 250;
        ht = parseInt(ht) + 250;
        $("#canvas").animate({
            width: wd,
            height: ht
        });
        var ctx = canvas.getContext("2d");
        ctx.drawImage(backgroundImage, 0, 0, wd - 1, ht - 1);
        ctx.drawImage(outlineImage, 0, 0, wd - 1, ht - 1);
        redraw();
        console.log(wd + ":" + ht);
    });
    $("#zoomout").click(function() {
        var wd = $("#canvas").width();
        var ht = $("#canvas").height();
        wd = parseInt(wd) - 250;
        ht = parseInt(ht) - 250;
        if (wd < 500) {
            return false;
        }
        $("#canvas").animate({
            width: wd,
            height: ht
        });
        var ctx = canvas.getContext("2d");
        ctx.drawImage(backgroundImage, 0, 0, wd - 1, ht - 1);
        ctx.drawImage(outlineImage, 0, 0, wd - 1, ht - 1);
        redraw();
        console.log(wd + ":" + ht);
    });
</script>

Answer 1

Disable / remove click handlers.

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