Zoom with MouseWheel speed

[Richard Duivenvoorde]

Hi,

When zooming in using the scrollwheel of your mouse in our application AND in the Heron examples you zoom 2 resolutions for every 'tic'.

I think that is too fast. Within a couple of mousewheel-clicks you are on lowest level.

I've searched for some config, but cannot find where the normal OL behaviour is overridden.

Note: http://dev.openlayers.org/examples/zoomLevels.html also zooms one resolution/zoomlevel per click

Pointers appreciated,

Regards,

Richard Duivenvoorde

[Just van den Broecke]

Hi Richard,

Indeed a problem, seeing the "2-step" in several Heron apps.
Cannot directly point to fix, but this behaviour is determined by the
Navigation OL Control. Somehow settings like in a Heron App,
Heron.options.map.settings.controls:

new OpenLayers.Control.Navigation({
dragPanOptions: {enableKinetic: true},
zoomWheelEnabled: true,
mouseWheelOptions: {cumulative: false, interval: 10, delta:
1, maxDelta: 1}
}),

seem to be ignored/overwritten. "delta" determines the zoom steps AFAICS.

Control Defaults are in the MapPanel.js widget:
https://github.com/heron-mc/heron-mc/blob/master/heron/lib/widgets/MapPanel.js


Can you open an issue for this? You may try to fix by setting Navigation
Control options in MapPanel.js. If you can find out more would be nice.

Best,

Just

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