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Sry, worn topic before.<br>
Hi,<br>
I have a listener on "removelayer" (why there ist no
"preremovelayer" like for addlayer). When a layer is removed then
the following function is called:<br>
<pre style="font-family: Consolas; font-size: 13px; color: black; background: none repeat scroll 0% 0% white;">deactivateDetails: <span style="color: blue;">function</span> () {
<span style="color: blue;">if</span> (<span style="color: blue;">this</span>.showDetailsSelect != <span style="color: blue;">null</span>) {
<span style="color: blue;"></span><span style="color: blue;">this</span>.showDetailsSelect.unselectAll();
<span style="color: blue;">this</span>.showDetailsSelect.deactivate();
<span style="color: blue;">this</span>.map.removeControl(<span style="color: blue;">this</span>.showDetailsSelect);
<span style="color: blue;">this</span>.showDetailsSelect.destroy();
<span style="color: blue;">this</span>.showDetailsSelect = <span style="color: blue;">null</span>;
}
},</pre>
After this function other listeners are called at last the listner
of the handler in the showDetailsSelect control which is a
SelectFeature-control. So the function <span class="sourceRowText"
role="presentation">moveLayerToTop is called and the "this.map is
null"</span>-exception is thrown. When I remove the destroy-method
the exception isn't thrown. The question is "When you should call
destroy? Or should I ever call destroy? Or is there an error in
destory of SelectFeature?"<br>
Last but not least the initialization of the SelectFeature:<br>
<pre style="font-family: Consolas; font-size: 13px; color: black; background: none repeat scroll 0% 0% white;"><span style="color: blue;">if</span> (layer <span style="color: blue;">instanceof</span> OpenLayers.Layer.Vector) {
$this = <span style="color: blue;">this</span>;
<span style="color: blue;">var</span> selectOptions = {
hover: <span style="color: blue;">true</span>,
toggle: <span style="color: blue;">true</span>,
highlightOnly: <span style="color: blue;">true</span>,
clickout: <span style="color: blue;">true</span>,
renderIntent: <span style="color: maroon;">"temporary"</span>,
onSelect: <span style="color: blue;">function</span> (f) { $this.showDetails(f); },
onUnselect: <span style="color: blue;">function</span> (f) { $this.hideDetails(f); }
};
<span style="color: blue;">if</span> (<span style="color: blue;">this</span>.showDetailsSelect) {
<span style="color: blue;">this</span>.deactivateDetails();
}
<span style="color: blue;">this</span>.showDetailsSelect = <span style="color: blue;">new</span> OpenLayers.Control.SelectFeature(
layer, selectOptions
);
<span style="color: blue;">this</span>.showDetailsSelect.clickSelect = <span style="color: blue;">this</span>.fixDetailsOnClick;
<span style="color: blue;">this</span>.showDetailsSelect.events.register(<span style="color: maroon;">"featurehighlighted"</span>, <span style="color: blue;">this</span>, <span style="color: blue;">this</span>.tooltipDetailsSelect);
<span style="color: blue;">this</span>.showDetailsSelect.events.register(<span style="color: maroon;">"featureunhighlighted"</span>, <span style="color: blue;">this</span>, <span style="color: blue;">this</span>.tooltipDetailsUnselect);
<span style="color: blue;">this</span>.map.addControl(<span style="color: blue;">this</span>.showDetailsSelect);
<span style="color: blue;">this</span>.showDetailsSelect.activate();
}</pre>
<br>
In advance thx for answers and comments.<br>
Slawomir<br>
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