Insertion markers strobe when snap radius is increased

[NeilFraser]

On develop, go to playground. Insertion markers work as expected.

On the console type: Blockly.SNAP_RADIUS *= 2

Now insertion markers flicker badly.

[RoboErikG]

This is because you also need to change CONNECTING_SNAP_RADIUS, which is how we add hysteresis to the snap radius.

I don't think it makes sense to have an API for adjusting these values at runtime, would a comment that if you adjust one you need to adjust the other be appropriate?

[NeilFraser]

Thanks. Knowing about CONNECTING_SNAP_RADIUS solves the issue in Blockly Games. I'll leave this issue open so you can figure out if it's

• just a documentation issue,
• or whether there's some sort of max(CONNECTING_SNAP_RADIUS, SNAP_RADIUS) that should be there,
• or whether CONNECTING_SNAP_RADIUS can be removed as a constant and be computed from SNAP_RADIUS instead,
• or whether CONNECTING_SNAP_RADIUS becomes a multiplier of SNAP_RADIUS, defaulting to 1.0,
• or whether a console warning can be printed if flickering is detected informing the developer what constant to tweak,
• or whether CONNECTING_SNAP_RADIUS should default to -1 which signals that SNAP_RADIUS be used instead,
• or something else...

Just some options to consider.