Dynamically adjust parameters of trapezoid

Ignition
,
1

Is there a straightforward to dynamically adjust a trapezoid in Perspective? Normally you only have the two dimensions (width, height) and would like a little more independent control.

2

You could dynamically modify an SVG.

What type of parameters are you looking to control?

3

Just looking to control height on ends

4

Sure.

Obviously you can get much more complex than this, but it should serve as a good enough example to get you started.

trapezoid

Copy the JSON below and paste it into a view to see the how I did it.

{
  "custom": {},
  "params": {},
  "props": {
    "defaultSize": {
      "height": 762,
      "width": 1055
    }
  },
  "root": {
    "children": [
      {
        "meta": {
          "name": "blank"
        },
        "position": {
          "height": 150,
          "width": 600,
          "x": 50,
          "y": 78
        },
        "propConfig": {
          "props.elements[0].d": {
            "binding": {
              "config": {
                "expression": "max({../Slider.props.value},5)/100 * 40"
              },
              "transforms": [
                {
                  "expression": "concat(\"M10 40 L190 40 L180 \", {value}, \" L20 \", {value}, \"Z\")",
                  "type": "expression"
                }
              ],
              "type": "expr"
            }
          }
        },
        "props": {
          "elements": [
            {
              "fill": {
                "paint": "#00000000"
              },
              "stroke": {
                "paint": "#000000"
              },
              "type": "path"
            }
          ],
          "preserveAspectRatio": "xMinYMin",
          "viewBox": "0 0 200 50"
        },
        "type": "ia.shapes.svg"
      },
      {
        "meta": {
          "name": "Slider"
        },
        "position": {
          "height": 39,
          "width": 365,
          "x": 79,
          "y": 241
        },
        "props": {
          "labels": {
            "interval": 10,
            "show": true
          }
        },
        "type": "ia.input.slider"
      },
      {
        "meta": {
          "name": "Label"
        },
        "position": {
          "height": 32,
          "width": 50,
          "x": 507,
          "y": 244.5
        },
        "propConfig": {
          "props.text": {
            "binding": {
              "config": {
                "path": "../Slider.props.value"
              },
              "type": "property"
            }
          }
        },
        "type": "ia.display.label"
      }
    ],
    "meta": {
      "name": "root"
    },
    "type": "ia.container.coord"
  }
}
2 Likes
5

This has helped. Taken me a bit to figure it out but think I am getting there. Thanks,

6

Can I ask one more question. How are you creating your image/drawing Seems to be stored inside ignition. I have used Inkscape but am not able to change it to a drawing.

7

When you drag and drop an SVG file on to your view in the designer, you are presented with a dialog which gives you the option to either Save and link or Embed image.

If you choose embed the SVG will be inserted into the view as a drawing object.

Here is a small example of how I do this for small less complex (my definition of complex is probably different than most when it comes to SVG) images.

8

Thanks again. Will try it out.