It looks like this has got more complicated than it should be and I vaguely
remember some discussion about it between Jody and Michael about
fixing/breaking layer events a long time in the past.
Anyway the problem is almost certainly in the repaintMap method that you
left out. I should contain something like:
MapLayerEvent ev = new MapLayerEvent(this,MapLayerEvent.STYLE_CHANGED);
MapLayerListEvent event = new MapLayerListEvent(map, map.layers().get(0),
0, ev);
frame.getMapPane().layerChanged(event);
Other wise the renderer doesn't realise that the styleon the layer has
changed and thus doesn't bother to redraw until you hit pan/zoom or reset
to force it.
I have a demo at https://gitlab.com/snippets/5948 which is fairly nasty in
terms of layout but should show what is going on.
Ian
On Wed, Jun 24, 2015 at 4:35 AM Gabriella Turek <gabriella.tu...@niwa.co.nz>
wrote:
> Hi all,
> I am trying to allow a use of my app to set a shape file style that’s
> color coded in terms of an attribute’s value.
> I should also make note that I am using geotools’s JMapPane to display my
> layers.
> Unfortunately I can’t get this to work. I am revising some code I wrote
> way back at the time of geotools 2.X or there abouts.
> I am pretty sure it used to work back then, but no longer. When I set the
> new style, only one of the colors gets picked up, not all of them,
> and it is applied to all features. In other words none of the filters seem
> to be applied.
> (Perhaps it is a problem with JMapPane (being that it’s not supported
> directly?)
> Here’s my code. In both case I am getting the data from table the user has
> filled with his/her data ranges and colors and selAttr is the attribute in
> question
>
> Old code:
>
> Style style = mylayer.getStyle();
>
> FeatureTypeStyle[] fts = style.getFeatureTypeStyles();
>
> int rows = tableModel.getRowCount();
>
> double mmin, mmax;
>
> for (int i = 0; i < rows; i++) {
>
> Color c = (Color) tableModel.getValueAt(i, 2);
>
> mmin = Double.parseDouble(tableModel.getValueAt(i, 0).toString());
>
> mmax = Double.parseDouble(tableModel.getValueAt(i, 1).toString());
>
> fts[0].addRule(makeNewRule(c, mmin, mmax));
>
> }
>
> repaintMap();
>
>
> private Rule makeNewRule(Color color, double min, double max) {
>
> StyleBuilder sb = new StyleBuilder();
>
> Symbolizer[] symb = new Symbolizer[1];
>
> Mark dot;
>
> Graphic graphic;
>
> switch (shape) {
>
> case POINT: // point
>
> dot = sb.createMark(StyleBuilder.MARK_CIRCLE, color, color, 1.0);
>
> graphic = sb.createGraphic(null, dot, null, 1, 4, 0);
>
> symb[0] = sb.createPointSymbolizer(graphic);
>
> break;
>
>
> case LINE: // line
>
> symb[0] = sb.createLineSymbolizer(color, 2);
>
> break;
>
>
> case POLYGON: // polygon
>
> symb[0] = sb.createPolygonSymbolizer(color);
>
> break;
>
> }
>
>
> Rule rule = sb.createRule(symb);
>
> PropertyIsBetween bf = ff.between(ff2.property(at.getName().getLocalPart()),
> ff.literal(min), ff.literal(max));
>
> rule.setFilter(bf);
>
> rule.setName(at.getName().getLocalPart() + "*" + Double.toString(min) +
> "-" + Double.toString(max));
>
> System.out.println("New rule name : " + at.getName().getLocalPart() + "*"
> + Double.toString(min) + "-" + Double.toString(max));
>
> return rule;
>
> }
>
>
>
> New code:
>
> int rows = tableModel.getRowCount();
>
> FeatureTypeStyle style = styles.get(0);
>
> for (int i = 0; i < rows; i++) {
>
> Color c = (Color) tableModel.getValueAt(i, 2);
>
> double min = Double.parseDouble(tableModel.getValueAt(i, 0).toString());
>
> double max = Double.parseDouble(tableModel.getValueAt(i, 1).toString());
>
> style.rules().add(makeNewRule(c, min, max));
>
> }
> repaintMap();
>
>
> private Rule makeNewRule(Color color, double min, double max) {
>
> StyleBuilder sb = new StyleBuilder(sf);
>
> Symbolizer[] symb = new Symbolizer[1];
>
> if (geomType == Geometries.POINT || geomType == Geometries.MULTIPOINT) {
>
> Mark dot = sb.createMark(StyleBuilder.MARK_CIRCLE, color, color,
> DEFAULT_POINT_SIZE);
>
> Graphic graphic = sb.createGraphic(null, dot, null, opacity, 4, 0);
>
> symb[0] = sb.createPointSymbolizer(graphic);
>
> } else if (geomType == Geometries.LINESTRING || geomType == Geometries.
> MULTILINESTRING) {
>
> symb[0] = sb.createLineSymbolizer(color, DEFAULT_LINE_WIDTH);
>
> } else if (geomType == Geometries.POLYGON || geomType == Geometries.
> MULTIPOLYGON) {
>
> Stroke stroke = sb.createStroke(borderColor, DEFAULT_LINE_WIDTH, opacity);
>
> Fill fill = sb.createFill(color, opacity);
>
> symb[0] = sb.createPolygonSymbolizer(stroke, fill);
>
> }
>
> Rule rule = sb.createRule(symb);
>
> PropertyIsBetween bf = ff.between(ff2.property(selAttr.getLocalName()), ff
> .literal(min), ff.literal(max));
>
> rule.setFilter(bf);
>
> rule.setName(selAttr.getLocalName() + "*" + Double.toString(min) + "-" +
> Double.toString(max));
>
> System.out.println("New rule name : " + selAttr.getLocalName() + "*" +
> Double.toString(min) + "-" + Double.toString(max));
>
> return rule;
>
> }
>
>
> Thanx a bunch
>
> gaby
>
>
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