42 lines
1.2 KiB
JavaScript
42 lines
1.2 KiB
JavaScript
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var wrapper = document.getElementById("signature-pad"),
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clearButton = wrapper.querySelector("[data-action=clear]"),
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saveDataButton = wrapper.querySelector("[data-action=save-data]"),
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canvas = wrapper.querySelector("canvas"),
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signaturePad;
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// Adjust canvas coordinate space taking into account pixel ratio,
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// to make it look crisp on mobile devices.
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// This also causes canvas to be cleared.
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function resizeCanvas() {
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// When zoomed out to less than 100%, for some very strange reason,
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// some browsers report devicePixelRatio as less than 1
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// and only part of the canvas is cleared then.
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var ratio = Math.max(window.devicePixelRatio || 1, 1);
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canvas.width = canvas.offsetWidth * ratio;
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canvas.height = canvas.offsetHeight * ratio;
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canvas.getContext("2d").scale(ratio, ratio);
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}
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window.onresize = resizeCanvas;
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resizeCanvas();
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signaturePad = new SignaturePad(canvas);
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clearButton.addEventListener("click", function (event) {
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signaturePad.clear();
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});
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saveDataButton.addEventListener("click", function (event) {
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if (signaturePad.isEmpty()) {
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alert("Por favor firme primero.");
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} else {
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saveViaAJAX();
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}
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});
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