[OpenLayers-Users] Switching to singleTile mode (and back) on the fly

[Erik Uzureau]

If anyone cares, I have opened a ticket for this:
http://trac.openlayers.org/ticket/1684

I probably won't look at it for a long while, but at least it is
recorded somewhere.

Erik

On Thu, Jan 3, 2008 at 3:18 PM, Erik Uzureau <erik.uzureau at metacarta.com> wrote:
> seems like maybe it would be nice to have layer switcher's redraw()
> re-init the layerStates array automatically? or if not automatically,
> at least via a parameter to the function or something.... the
> layerStates property to me should be a private of the layerswitcher,
> that no user should need to know about and certainly not modify...
>
> thoughts?
>
> erik
>
> On 12/5/07, Jon Blower <jdb at mail.nerc-essc.ac.uk> wrote:
>> > You can force
>> > this by doing layerswitcher_control.layerStates = []; to clear out the
>> > layerStates, which will cause it to redraw.
>>
>> Thanks Christopher, that worked a treat.  To summarize, the code
>> sequence that works is:
>>
>>    myLayer.displayInLayerSwitcher = false;
>>    layerSwitcher.layerStates = [];
>>    layerSwitcher.redraw();
>>
>> Jon
>>
>> On Dec 4, 2007 9:42 PM, Christopher Schmidt <crschmidt at metacarta.com> wrote:
>> > On Tue, Dec 04, 2007 at 09:33:41PM +0000, Jon Blower wrote:
>> > > OK, attached is an HTML file that shows the problem.  As you can see
>> > > from the code I'm doing the following:
>> > >
>> > > 1) Creating two overlay layers, only one of which is to be displayed
>> > > in the layer switcher
>> > > 2) Adding both overlays to the map
>> > > 3) Toggling the displayInLayerSwitcher property of each overlay layer
>> > > 4) Redrawing the layer switcher control
>> > >
>> > > Initially nothing changes as a result of (3) and (4), i.e. the layers
>> > > that are displayed in the switcher don't change.  However, if you
>> > > click the overlay's checkbox in the layer switcher it seems to sort
>> > > itself out and work correctly.
>> > >
>> > > So, it seems that the layer switcher only redraws when it is clicked.
>> >
>> > You need to change the state of the LayerSwitcher -- by turning a layer
>> > on or off using setVisibility -- before it will redraw. You can force
>> > this by doing layerswitcher_control.layerStates = []; to clear out the
>> > layerStates, which will cause it to redraw.
>> >
>> > Regards,
>> > --
>> > Christopher Schmidt
>> > MetaCarta
>> >
>>
>>
>>
>> --
>> --------------------------------------------------------------
>> Dr Jon Blower              Tel: +44 118 378 5213 (direct line)
>> Technical Director         Tel: +44 118 378 8741 (ESSC)
>> Reading e-Science Centre   Fax: +44 118 378 6413
>> ESSC                       Email: jdb at mail.nerc-essc.ac.uk
>> University of Reading
>> 3 Earley Gate
>> Reading RG6 6AL, UK
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>