Re: [Geotools-gt2-users] Programmatically retrieving a feature property name
Got it ! I will try to keep a low profile ;-) But it's true I'm trying to understand all the tricks behind styling. It is really performance bottleneck. Did you know that drawing a 1 pixel width Line String was much faster than a 2 pixel width Line String ? In my particular case, refreshing the map pane took approximately 1.5s instead of 3.5s... (my map contains 180 000 colored Line Strings) Le 6 mars 09 à 05:17, Michael Bedward a écrit : You better watch out Ben... soon all of the really tricky styling questions are going to be directed to you :-) Michael -- Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
Re: [Geotools-gt2-users] Programmatically retrieving a feature property name
Hi Benoît, Looking at the style builder classes, it does not seem to be possible, as it does not expose a method that creates a stroke from an Expression. However you can get at the underlying style factory (getStyleFactory()), and should be able to manually build up the symbolizer, creating the stroke with a property expression. The downside being that it will take 3 or 4 lines of code to build up the symbolizer manually, instead of calling a single method on the builder. -Justin Benoît Thiébault wrote: Hi everyone, I am trying to build a style programmatically, and I would like the color of my line symbolizer to be retrieved from a feature attribute, like in the SLD sample below. Do you know how to do this ? UserStyle FeatureTypeStyle Rule LineSymbolizer Stroke CssParameter name=\stroke\ PropertyNamecolor/PropertyName /CssParameter CssParameter name=\width\1.0/CssParameter /Stroke /LineSymbolizer /Rule /FeatureTypeStyle /UserStyle Here is my code so far: // Create the style Style style = null; // Create the style builder and the filter factory StyleBuilder sb = new StyleBuilder(); // Creates the line symbolizer LineSymbolizer symbolizer = sb.createLineSymbolizer(Color.decode(???)); // Creates a rule Rule rule = sb.createRule(symbolizer); // Creates a feature style FeatureTypeStyle fts = sb.createFeatureTypeStyle(typeName, rule); // Creates the style style = sb.createStyle(); // Adds the feature style to the style style.addFeatureTypeStyle(fts); -- Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users -- Justin Deoliveira OpenGeo - http://opengeo.org Enterprise support for open source geospatial. -- Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
Re: [Geotools-gt2-users] Programmatically retrieving a feature property name
Hi Justin, In fact, I just found a way to do it : // Temporary style Style style = null; // Style builder StyleBuilder sb = new StyleBuilder(); // Line symbolizer stroke Stroke stroke = sb.createStroke(sb.attributeExpression(color), sb.literalExpression(2.0)); // Line symbolizer LineSymbolizer lineSymbolizer = sb.createLineSymbolizer(stroke); // Creates the style style = sb.createStyle(lineSymbolizer); Le 5 mars 09 à 21:33, Justin Deoliveira a écrit : Hi Benoît, Looking at the style builder classes, it does not seem to be possible, as it does not expose a method that creates a stroke from an Expression. However you can get at the underlying style factory (getStyleFactory()), and should be able to manually build up the symbolizer, creating the stroke with a property expression. The downside being that it will take 3 or 4 lines of code to build up the symbolizer manually, instead of calling a single method on the builder. -Justin Benoît Thiébault wrote: Hi everyone, I am trying to build a style programmatically, and I would like the color of my line symbolizer to be retrieved from a feature attribute, like in the SLD sample below. Do you know how to do this ? UserStyle FeatureTypeStyle Rule LineSymbolizer Stroke CssParameter name=\stroke\ PropertyNamecolor/PropertyName /CssParameter CssParameter name=\width\1.0/CssParameter /Stroke /LineSymbolizer /Rule /FeatureTypeStyle /UserStyle Here is my code so far: // Create the style Style style = null; // Create the style builder and the filter factory StyleBuilder sb = new StyleBuilder(); // Creates the line symbolizer LineSymbolizer symbolizer = sb.createLineSymbolizer(Color.decode(???)); // Creates a rule Rule rule = sb.createRule(symbolizer); // Creates a feature style FeatureTypeStyle fts = sb.createFeatureTypeStyle(typeName, rule); // Creates the style style = sb.createStyle(); // Adds the feature style to the style style.addFeatureTypeStyle(fts); -- Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users -- Justin Deoliveira OpenGeo - http://opengeo.org Enterprise support for open source geospatial. Benoît Thiébault Société Artenum 24 rue Louis Blanc, 75010 Paris tel: +33 (0)1 46 94 67 54 Artenum - Science Groupware - http://www.artenum.com -- Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
Re: [Geotools-gt2-users] Programmatically retrieving a feature property name
Aha, very nice, much better than my suggestion :). -Justin Benoît Thiébault wrote: Hi Justin, In fact, I just found a way to do it : // Temporary style Style style = null; // Style builder StyleBuilder sb = new StyleBuilder(); // Line symbolizer stroke Stroke stroke = sb.createStroke(sb.attributeExpression(color), sb.literalExpression(2.0)); // Line symbolizer LineSymbolizer lineSymbolizer = sb.createLineSymbolizer(stroke); // Creates the style style = sb.createStyle(lineSymbolizer); Le 5 mars 09 à 21:33, Justin Deoliveira a écrit : Hi Benoît, Looking at the style builder classes, it does not seem to be possible, as it does not expose a method that creates a stroke from an Expression. However you can get at the underlying style factory (getStyleFactory()), and should be able to manually build up the symbolizer, creating the stroke with a property expression. The downside being that it will take 3 or 4 lines of code to build up the symbolizer manually, instead of calling a single method on the builder. -Justin Benoît Thiébault wrote: Hi everyone, I am trying to build a style programmatically, and I would like the color of my line symbolizer to be retrieved from a feature attribute, like in the SLD sample below. Do you know how to do this ? UserStyle FeatureTypeStyle Rule LineSymbolizer Stroke CssParameter name=\stroke\ PropertyNamecolor/PropertyName /CssParameter CssParameter name=\width\1.0/CssParameter /Stroke /LineSymbolizer /Rule /FeatureTypeStyle /UserStyle Here is my code so far: // Create the style Style style = null; // Create the style builder and the filter factory StyleBuilder sb = new StyleBuilder(); // Creates the line symbolizer LineSymbolizer symbolizer = sb.createLineSymbolizer(Color.decode(???)); // Creates a rule Rule rule = sb.createRule(symbolizer); // Creates a feature style FeatureTypeStyle fts = sb.createFeatureTypeStyle(typeName, rule); // Creates the style style = sb.createStyle(); // Adds the feature style to the style style.addFeatureTypeStyle(fts); -- Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users -- Justin Deoliveira OpenGeo - http://opengeo.org Enterprise support for open source geospatial. Benoît Thiébault Société Artenum 24 rue Louis Blanc, 75010 Paris tel: +33 (0)1 46 94 67 54 Artenum - Science Groupware - http://www.artenum.com -- Justin Deoliveira OpenGeo - http://opengeo.org Enterprise support for open source geospatial. -- Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
Re: [Geotools-gt2-users] Programmatically retrieving a feature property name
You better watch out Ben... soon all of the really tricky styling questions are going to be directed to you :-) Michael -- Open Source Business Conference (OSBC), March 24-25, 2009, San Francisco, CA -OSBC tackles the biggest issue in open source: Open Sourcing the Enterprise -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD http://p.sf.net/sfu/XcvMzF8H ___ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
