縮放 fabric.js 畫布對象

Question

我的頁面上有一個 fabric.js 畫布，我想響應。 我的代碼適用於縮放畫布本身，但不適用於我在上面繪制的對象。 任何的想法？ 我已經搜索過，但找不到適合我的解決方案。

var resizeCanvas;

resizeCanvas = function() {
  var height, ratio, width;
  ratio = 800 / 1177;
  width = tmpl.$('.canvas-wrapper').width();
  height = width / ratio;

  canvas.setDimensions({
    width: width,
    height: height
  });
};

Meteor.setTimeout(function() {
  return resizeCanvas();
}, 100);

$(window).resize(resizeCanvas);

Answer 1

這是我的縮放功能 - 我們縮放畫布，然后循環遍歷所有對象並縮放它們。

像zoomIt(2.2)一樣調用

function zoomIt(factor) {
canvas.setHeight(canvas.getHeight() * factor);
canvas.setWidth(canvas.getWidth() * factor);
if (canvas.backgroundImage) {
    // Need to scale background images as well
    var bi = canvas.backgroundImage;
    bi.width = bi.width * factor; bi.height = bi.height * factor;
}
var objects = canvas.getObjects();
for (var i in objects) {
    var scaleX = objects[i].scaleX;
    var scaleY = objects[i].scaleY;
    var left = objects[i].left;
    var top = objects[i].top;

    var tempScaleX = scaleX * factor;
    var tempScaleY = scaleY * factor;
    var tempLeft = left * factor;
    var tempTop = top * factor;

    objects[i].scaleX = tempScaleX;
    objects[i].scaleY = tempScaleY;
    objects[i].left = tempLeft;
    objects[i].top = tempTop;

    objects[i].setCoords();
}
canvas.renderAll();
canvas.calcOffset();
}

Answer 2

對於那些尋找用於縮放（也稱為縮放）畫布的織物內置方法的人，請查看setZoom 。