PathView Animation

adaptine

Hello, I'm working on a "heading display" which uses PathView to scroll through values from 0 to 359.9.

The entire number-range including ticks is moving except the orange line which is static.

What I'm struggling with is the animation / "smoothness" of the pathview. I'm moving the pathview using currentIndex from 0 to 3599, ie. the PathView has model: 3599. The problem is that the "default animation" of pathview using highlightMoveDuration doesnt give very smooth animation, the movement is a bit jumpy between each update of currentIndex.

Using SmoothedAnimation on the input-value and highlightMoveDuration set to 0 yields somewhat satisfactory movement although it could be smoother since due to the fact that there is no animation between each index now.

However using SmoothedAnimation introduces another issue ... When the input-value is passing 0 from either direction this will cause a jump in the animation. For instance if the value is going from 359 to 0, this causes the animation to ramp downward to 0, not go straight to 0. I've tried the SmoothedAnimation.Sync value for reversingMode, which somewhat works but it stops the movement at the instant of the jump, causing the animation to ramp up again, which is problematic if passing 0 at a higher velocity.

Does anyone have a suggestion how to do this properly? Ie. smooth animation between indices as if highlightMoveDuration where used but smoother without jumps, and no issues with animation during the jump from 359.9 to 0.

PathView {
      	id: headingPath
     	anchors.fill: parent
      	model: 3599
      	delegate: headingDelegate
      	pathItemCount: 650
      	preferredHighlightBegin: 0.5
      	preferredHighlightEnd: 0.5
      	clip: true
  
    	snapMode: PathView.NoSnap
    
    	interactive: false
    	highlightMoveDuration: 0
    
    	path: Path {
       		startX: 20
       		startY: root.height/2
    
    		PathLine { x: root.width*0.5; y: root.height*0.5; }
    		PathLine { x: root.width-20; y: root.height*0.5; }
    	}
    }

xinyangme

Have you solved the current problem? I have the same problem but don't know how to fix it.