Can a PointText object in paper.js be customized with a variety of colors and font sizes?

I'm currently developing an image annotator that uses paper.js PointText objects as part of its functionality. One feature we are exploring is the capability for users to highlight different sections of text within a specific PointText object with varying colors and font sizes.

While browsing the paper.js website, I came across the Gradient option, but implementing it might feel like using a workaround, assuming it is even feasible in the first place. Additionally, making sure it displays correctly in the textarea used for editing the PointText seems like another messy task; I am aiming for a more elegant solution.

Any proposed solutions should allow for draggable text within the canvas boundaries.

As of now, I don't have any code snippets to share since I haven't found a suitable approach to experiment with. However, I'm reaching out to the SO community to see if there are any potential solutions available.

javascriptpaperjs

Answer №1

It seems that text tools are still under development in Paper.js, so the best option would be to create a PointText by color or utilize gradients as suggested.

In my perspective, overlaying text on top of the canvas and managing styles with CSS is a more suitable approach. You can take a look at this example:

html:

<canvas id="PaperCanvas"></canvas>
<div id="container">
  <div id="text" contenteditable='true'>
    Your text
  </div>
</div>

coffeescript:

  ### ... some paper.js code ...
  # drag & drop:
  $('#container').mousedown (event)->
    if event.target.id != "container"
      return
    global.drag = true
    global.delta = new Point( $('#container').offset().left  - event.pageX, $('#container').offset().top - event.pageY)
    $("#text").addClass("noselect")
    return

  $("html").mousemove (event)->
    if global.drag
      $('#container').css( left: event.pageX + global.delta.x, top: event.pageY + global.delta.y)
    return

  $("html").mouseup (event)->
    global.drag = false
    $("#text").removeClass("noselect")
    return

css:

canvas {
  border: 1px solid black;
  width: 500px;
  height: 500px;
}

#container {
  position: absolute;
  top: 50px;
  left: 50px;
  padding: 20px;
  border: 1px solid black;
  background-color: 'red';
}
#text {
  padding: 20px;
  background-color: 'white';
  border: 1px solid black;
}
.noselect {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

*

The TextItem type allows you to create typography. Its functionality is inherited by different text item types such as PointText, and AreaText (coming soon).

Edit

You can then utilize either html-to-canvas or rasterizeHTML.js to convert your colored text into an image for easy placement onto the paper.js canvas. (You can use Raster to import your image into paper.js)

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