Sensor Mode 4 Pointer

A pointer sensor rotates an image at a certain angle calculated from the current sensor value and alpha-blends it with the panel image.

Sensor configuration fields:

• mode: 4 (for pointer)
• direction: 1 = clockwise, 2 = counter-clockwise
• label: label identifier, also used as sensor value data source identifier
• x, y: position on the panel
• width, height: size of the pointer
• pic: pointer image to overlay. Should match width, height, otherwise it will be resized
• minAngle, maxAngle: range of the rotated image
• minValue, maxValue: scaling range to apply on the value for minAngle .. maxAngle (to be verified)
• xz_x, xz_y

Example

The following configuration and graphics are taken from the 三环_windows panel configuration in 有线网卡 windows驱动.rar.

Example panel.json with a single "pointer" indicator sensor and the following (partial) background image in img:

{
  "name": "Pointer test panel",
  "img": "background.jpg",
  "sensor": [
    {
      "id": "a9d4acac-2af9-4fe0-9f69-86cd09f25696",
      "itemName": "CPU dial",
      "mode": 4,
      "direction": 1,
      "label": "cpu_percent",
      "value": "47.7",
      "x": 160,
      "y": 208,
      "width": 302,
      "height": 302,
      "minAngle": -110,
      "maxAngle": 110,
      "minValue": 0,
      "maxValue": 90,
      "xz_x": 0,
      "xz_y": 0,
      "pic": "pointer.png"
    }
  ]
}

Pointer image "pic": "pointer.png":

The following graphic is rendered for a sensor value of 47.7:

Known Issues

Pointer sensor rendering has been reverse engineered from the AOOSTAR-X app. Not all options are supported.

• Work in progress, not yet fully tested