onWillPan property

WillPanCallback? onWillPan

Called whenever panning is happening.

If it returns false, panning will not happen.

MapPanDetails contains following properties.

• MapPanDetails.previousVisibleBounds - provides the visible bounds before the current panning operation completes i.e. current visible bounds.
• MapPanDetails.newVisibleBounds - provides the new visible bounds when the current pan completes. Hence, if it returns false, there will be no changes in the UI.
• MapPanDetails.zoomLevel - provides the current zoom level.
• MapPanDetails.delta - The difference in pixels between touch start and current touch position.
• MapPanDetails.globalFocalPoint - The global focal point of the pointers in contact with the screen.
• MapPanDetails.localFocalPoint - The local focal point of the pointers in contact with the screen.

Implementation

final WillPanCallback? onWillPan;