![]() Nor do I know how to make myself zoom out if I use the scroll wheel in the other direction. In other words, that line's a goner because we have the refs we need at hand. Note: I haven't even gotten into panning yet. Then, we also not need the prev coordsmax - 1 part because we already have the previous coordinate stored in prevCoord. I would be happy to answer any further questions. ![]() Please note: such events may come not only from mouse devices, but are also from other devices, such as phones and tablets, where they are emulated for compatibility. If anyone can help point me in another direction, or give some advice on my current attempt that would be great. JMouse events In this chapter we’ll get into more details about mouse events and their properties. def runAction(self, event):Ĭoords = clientX + "px " + clientY + "px" Other examples ask you to call 'GetBounds'.which is not available for Shape objects. This forces the object to suddently move when 'redrawn'. However, those coordinates are the X & Y positions of the mouse at the time of the event. ![]() My current attempt at this can be seen below. Most examples I've seen use the events StageX and StageY coordinates. After scrolling to the bottom of the image returned coordinates are outside the image: 'click on IMG at pixel (510,664) mouse pos (255,332) relative to boundingClientRect at (8,-69) client image size: 256 x 256 natural image size: 512 x 512'. So my logic is that if I create an onMouseMove script that records the current mouser position, I could then bind the Transorm-Origin to that x and y value. I was it to zoom in to wherever my mouse cursor is. My issue arises due to the fact the transform: scale(x) CSS function by default zooms in to wherever the transform origin is defined to be. Return _Scale_VariableĮssentially, everytime the scroll wheel is used I increase the scale value by 0.1. My zoom mechanic works by using an onWheel event listener, here is the code: def runAction(self, event): ![]() I am currently able to zoom, however I am limited to zooming into where the transform-origin is defined. I will give a brief description of my thought process and then provide some code. I am slightly limited in my development and am currently unable to import external libraries to aid in my scripting. I am a relatively new user to Ignition and have been trying to develop a way to zoom and pan on an Ignition screen similar to that of Google Maps. In my experience, though, as long as you're using this hook on smaller components that don't have a big DOM impact, you should be just fine.Hello all. Use this hook in the small “leaf node” components near the bottom of the tree.įor maximum performance, you can use a library like React Spring or Framer Motion, which will allow you to update values without triggering React renders. It shouldn't be used in a top-level component like App or Homepage, since that will cause a huge chunk of your React tree to re-render very often. The JavaScript script presented in this page can be used to Get Mouse coordinates inside a HTML element, usually a Div or an Image. That said, you do still need to be a bit careful where you use this hook. No matter how hard I tried, I couldn't come up with a contrived scenario where the throttle actually improved performance (while still updating often enough for smooth animations). In testing, though, it seemed to make performance worse. Originally, this hook included “throttle” functionality, which would limit the updates to a user-specified interval. This can be dozens and dozens of times a second. This component will re-render whenever the user moves the mouse.
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