等比缩放

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怎么等比缩放图形?

默认情况下拖动控件四个角上的控制点缩放是等比例的，如果你不想拖动它们时等比缩放，可以设置 keepRatio 属性为 false来关闭此特性。

同时即使设置了 keepRatio 属性为 false,也可以在拖动控制点时按住 SHIFT 保持等比缩放。

说明: 试试缩放下面的文字

Konva Shape transform and selection Demoview raw
<!DOCTYPE html>
<html>
  <head>
    <!-- USE DEVELOPMENT VERSION -->
    <script src="https://unpkg.com/konva@4.0.18/konva.min.js"></script>
    <meta charset="utf-8" />
    <title>Konva Keep Ratio Demo</title>
    <style>
      body {
        margin: 0;
        padding: 0;
        overflow: hidden;
        background-color: #f0f0f0;
      }
    </style>
  </head>

  <body>
    <div id="container"></div>
    <script>
      var width = window.innerWidth;
      var height = window.innerHeight;

      var stage = new Konva.Stage({
        container: 'container',
        width: width,
        height: height
      });

      var layer = new Konva.Layer();
      stage.add(layer);

      var text1 = new Konva.Text({
        x: 50,
        y: 70,
        fontSize: 30,
        text: 'keepRatio = true',
        draggable: true
      });
      layer.add(text1);

      var tr1 = new Konva.Transformer({
        node: text1,
        keepRatio: true,
        enabledAnchors: ['top-left', 'top-right', 'bottom-left', 'bottom-right']
      });
      layer.add(tr1);

      var text2 = new Konva.Text({
        x: 50,
        y: 200,
        fontSize: 30,
        text: 'keepRatio = false',
        draggable: true
      });
      layer.add(text2);

      var tr2 = new Konva.Transformer({
        node: text2,
        keepRatio: false,
        enabledAnchors: ['top-left', 'top-right', 'bottom-left', 'bottom-right']
      });
      layer.add(tr2);

      layer.draw();
    </script>
  </body>
</html>