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OpenLayers 3: Omit SelectInteraction after DrawInteraction


OpenLayers 3: Omit SelectInteraction after DrawInteraction

By : Pool Gallardo
Date : November 22 2020, 09:00 AM
around this issue Propably, this is happening because the single-click event is taking place 251ms after you clicked. It is a known issue -->check it here. It is build that way so double click can be recognised. Having both interactions active is caussing problems for sure. Someone has to deside. Is it select? or is it draw? or both? so ol3 desides that if you set both of them active that means you want both of them active. Disable the select interaction on drawstart and then on drawend try to enable your select interaction 251ms after the drawend event occurs. like sο:
code :
setTimeout(function(){
selectInteraction.setActive(true)
},300)
; 


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Nested dereferencing arrows in Perl: to omit or not to omit?

Nested dereferencing arrows in Perl: to omit or not to omit?


By : user1852850
Date : March 29 2020, 07:55 AM
this will help Unless you really enjoy typing or excessively long lines, don't use the arrows when you don't need them. Subscripts next to subscripts imply references, so the competent programmer doesn't need extra clues to figure that out.
I disagree that it's more readable to have extra arrows. It's definitely unconventional to have them moving the interesting parts of the term further away from each other.
code :
 $expr1->[$sub1{$x}]{$sub2[$y]-33*$x3}{24456+myFunct($abc)}
 $expr1->[$sub1{$x}]->{$sub2[$y]-33*$x3}->{24456+myFunct($abc)}
my $index = $sub1{$x};
my $key1  = $sub2[$y]-33*$x3;
my $key2  = 24456+myFunct($abc);

$expr1->[ $index ]{ $key1 }{ $key2 };
  my $value = get_value( $index, $key1, $key2 );

  my $value = get_value(
  $sub1{$x},
   $sub2[$y]-33*$x3,
   24456+myFunct($abc)
      );
Drag map lost in OpenLayers 3 when using hover SelectInteraction with ol.events.condition.mouseMove

Drag map lost in OpenLayers 3 when using hover SelectInteraction with ol.events.condition.mouseMove


By : user2491886
Date : March 29 2020, 07:55 AM
it helps some times I'm not sure whether you had checked the mailing list already.
This is a known issue of OpenLayers 3.
Are the any plans in openlayers 3.0 to duplicate the OpenLayers.Control.DragFeature as found in Openlayers 2.0

Are the any plans in openlayers 3.0 to duplicate the OpenLayers.Control.DragFeature as found in Openlayers 2.0


By : user2839761
Date : March 29 2020, 07:55 AM
hope this fix your issue Yes there are plans to add a "drag feature" interaction. See https://github.com/openlayers/ol3/issues/2947. But this still requires work before being merged into the master branch of OpenLayers 3.
Openlayers 3 - Create custom symbol like openlayers 2 -> OpenLayers.Renderer.symbol.anySymbol

Openlayers 3 - Create custom symbol like openlayers 2 -> OpenLayers.Renderer.symbol.anySymbol


By : KnExp
Date : March 29 2020, 07:55 AM
it fixes the issue You can draw your custom symbol to a canvas, and use that as icon image. OpenLayers provides a very nice API for this. You may want to take a look at the example: http://openlayers.org/en/v3.12.1/examples/earthquake-custom-symbol.html.
For your specific symbol, the code could look like this:
code :
var canvas = document.createElement('canvas');
var render = ol.render.toContext(canvas.getContext('2d'),
    {size: [50, 45]});
render.setFillStrokeStyle(
    new ol.style.Fill({ color: 'red' }),
    new ol.style.Stroke({ color: 'black' }));
render.drawPolygonGeometry(new ol.geom.Polygon(
    [[[50, 35], [10, 25], [21,35], [10, 45], [50, 35]]]));
var style = new ol.style.Style({
  image: new ol.style.Icon({
    img: canvas,
    imgSize: [canvas.width, canvas.height],
  })
});
How to prevent open layers DrawInteraction to draw LineString if the user clicks "wrong" area?

How to prevent open layers DrawInteraction to draw LineString if the user clicks "wrong" area?


By : jyoti
Date : September 21 2020, 08:00 AM
I wish this help you It may not be the only solution but removing the interaction from the map will cancel any drawing in progress, then you add it back
code :
draw.on('drawstart', function(e) {
  if (cancelcondition) {
    map.removeInteraction(draw);
    map.addInteraction(draw);
  }
});
import {noModifierKeys} from 'ol/events/condition';

const draw = new DrawInteraction({
  type: geometryType,
  condition: function(e) {
    return noModifierKeys(e) && !cancelcondition
  }
});
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