How to use

GeoServerAjaxFormLink

in

org.geoserver.web.wicket

protected void updateTransformation(AjaxRequestTarget ajaxTarget) {
  if (sourceCRS != null && targetCRS != null) {
    MathTransform mt = getTransform();
    if (mt != null) {
      wktLink.setEnabled(true);
      ajaxTarget.add(wktLink);
    }
  }
}

Component editAttributeLink(final IModel<AttributeDescription> itemModel) {
  GeoServerAjaxFormLink link =
      new GeoServerAjaxFormLink("link") {
        @Override
        protected void onClick(AjaxRequestTarget target, Form<?> form) {
          AttributeDescription attribute = itemModel.getObject();
          setResponsePage(new AttributeEditPage(attribute, NewFeatureTypePage.this));
        }
      };
  link.add(new Label("name", new PropertyModel<String>(itemModel, "name")));
  return link;
}

@Override
protected final void onSubmit(AjaxRequestTarget target, Form<?> form) {
  onClick(target, form);
  if (getPage() instanceof GeoServerBasePage) {
    ((GeoServerBasePage) getPage()).addFeedbackPanels(target);
  }
}

wktLink.setEnabled(getModelObject() != null);
add(wktLink);
wktLink.add(wktLabel);
wktLabel.setOutputMarkupId(true);

describeLink.setEnabled(false);
describeLink.setOutputMarkupId(true);
add(describeLink);

@Override
protected void onAfterSubmit(AjaxRequestTarget target, Form<?> form) {
  super.onAfterSubmit(target, form);
  try {
    CoordinateReferenceSystem crs =
        envelopePanel.getCoordinateReferenceSystem();
    if (crs == null) return;
    ReferencedEnvelope refEnv =
        new ReferencedEnvelope(CRS.getEnvelope(crs));
    envelopePanel.setModelObject(refEnv);
    envelopePanel.modelChanged();
    target.add(envelopePanel);
  } catch (Exception e) {
    throw new WicketRuntimeException(e);
  }
}

wktLink.setEnabled(getModelObject() != null);
add(wktLink);
wktLink.add( wktLabel );
wktLabel.setOutputMarkupId( true );

describeLink.setEnabled(false);
describeLink.setOutputMarkupId(true);
add(describeLink);

@Override
protected void onAfterSubmit(AjaxRequestTarget target, Form<?> form) {
  super.onAfterSubmit(target, form);
  if (CollectionUtils.isEmpty(getSelectedLayers())) return;
  GeoServerApplication gsa = (GeoServerApplication) getApplication();
  LayerGroupInfo lg = gsa.getCatalog().getFactory().createLayerGroup();
  getSelectedLayers()
      .forEach(
          l -> {
            lg.getLayers().add(gsa.getCatalog().getLayerByName(l));
          });
  try {
    CoordinateReferenceSystem crs =
        envelopePanel.getCoordinateReferenceSystem();
    // CRS.decode(envelopePanel.getCoordinateReferenceSystem());
    if (crs != null) {
      new CatalogBuilder(gsa.getCatalog())
          .calculateLayerGroupBounds(lg, crs);
    } else {
      // calculate from scratch
      new CatalogBuilder(gsa.getCatalog()).calculateLayerGroupBounds(lg);
    }
    ReferencedEnvelope renv = lg.getBounds();
    envelopePanel.setModelObject(renv);
  } catch (Exception e) {
    throw new WicketRuntimeException(e);
  }
  target.add(mainDiv);
}

  @Override
  protected void onUpdate(AjaxRequestTarget target) {
    convertInput();
    CoordinateReferenceSystem crs =
        (CoordinateReferenceSystem) getConvertedInput();
    if (crs != null) {
      setModelObject(crs);
      wktLabel.setDefaultModelObject(crs.getName().toString());
      wktLink.setEnabled(true);
    } else {
      wktLabel.setDefaultModelObject(null);
      wktLink.setEnabled(false);
    }
    target.add(wktLink);
    onSRSUpdated(toSRS(crs), target);
  }
});

Component editAttributeLink(final IModel itemModel) {
  GeoServerAjaxFormLink link = new GeoServerAjaxFormLink("link") {
    @Override
    protected void onClick(AjaxRequestTarget target, Form form) {
      AttributeDescription attribute = (AttributeDescription) itemModel.getObject();
      setResponsePage(new AttributeEditPage(attribute, NewFeatureTypePage.this));
    }
  };
  link.add(new Label("name", new PropertyModel(itemModel, "name")));
  return link;
}

@Override
protected final void onSubmit(AjaxRequestTarget target, Form form) {
  onClick(target, form);
  if(getPage() instanceof GeoServerBasePage) {
    target.addComponent(((GeoServerBasePage) getPage()).getFeedbackPanel());
  }
}

  @Override
  protected void onUpdate(AjaxRequestTarget target) {
    convertInput();
    
    CoordinateReferenceSystem crs = (CoordinateReferenceSystem) getConvertedInput();
    if(crs != null) {
      setModelObject(crs);
      wktLabel.setDefaultModelObject(crs.getName().toString());
      wktLink.setEnabled(true);
    } else {
      wktLabel.setDefaultModelObject(null);
      wktLink.setEnabled(false);
    }
    target.addComponent(wktLink);
    
    onSRSUpdated(toSRS(crs), target);
  }
});

addLink.add(new Icon("addIcon", ADD_ICON));
container.add(addLink);

@Override
protected void onBeforeRender() {
  CoordinateReferenceSystem crs = (CoordinateReferenceSystem) getModelObject();
  if ( crs != null ) {
    srsTextField.setModelObject( toSRS(crs) );
    wktLabel.setDefaultModelObject( crs.getName().toString() );    
  } else {
    wktLabel.setDefaultModelObject(null);
    wktLink.setEnabled(false);
  }
  
  super.onBeforeRender();
}

addLink.add(new Icon("addGlobalAttributeIcon", ADD_ICON));
container.add(addLink);
addLink.add(new Icon("addVariableAttributeIcon", ADD_ICON));
container.add(addLink);
addLink.add(new Icon("addExtraVariableIcon", ADD_ICON));
container.add(addLink);

@Override
protected void onBeforeRender() {
  CoordinateReferenceSystem crs = (CoordinateReferenceSystem) getModelObject();
  if (crs != null) {
    srsTextField.setModelObject(toSRS(crs));
    wktLabel.setDefaultModelObject(crs.getName().toString());
  } else {
    wktLabel.setDefaultModelObject(null);
    wktLink.setEnabled(false);
  }
  super.onBeforeRender();
}

  @Override
  protected void onCodeClicked(AjaxRequestTarget target, String epsgCode) {
    popupWindow.close(target);
    String srs = "EPSG:" + epsgCode;
    srsTextField.setModelObject(srs);
    target.add(srsTextField);
    CoordinateReferenceSystem crs = fromSRS(srs);
    CRSPanel.this.setModelObject(crs);
    if (crs != null) {
      wktLabel.setDefaultModelObject(crs.getName().toString());
      wktLink.setEnabled(true);
    } else {
      wktLabel.setDefaultModelObject(null);
      wktLink.setEnabled(false);
    }
    target.add(wktLink);
    onSRSUpdated(srs, target);
  }
};

  @Override
  protected void onCodeClicked(AjaxRequestTarget target, String epsgCode) {
    popupWindow.close(target);
    
    String srs =  "EPSG:" + epsgCode ;
    srsTextField.setModelObject( srs );
    target.addComponent( srsTextField );
    
    CoordinateReferenceSystem crs = fromSRS( srs );
    wktLabel.setDefaultModelObject( crs.getName().toString() );
    wktLink.setEnabled(true);
    target.addComponent( wktLink );
    
    onSRSUpdated(srs, target);
  }
};

  @Override
  protected void onSubmit(AjaxRequestTarget target) {
    details.setVisible(true);
    String coverageName = coverage.getModelObject();
    Catalog catalog = GeoServerApplication.get().getCatalog();
    CoverageInfo ci = catalog.getCoverageByName(coverageName);
    ReferencedEnvelope ri = ci.getNativeBoundingBox();
    final GetCoverageRequest gc = WCSRequestBuilderPanel.this.getCoverage;
    gc.bounds = ri;
    gc.targetCRS = ri.getCoordinateReferenceSystem();
    gc.sourceGridRange = null;
    describeLink.setEnabled(true);
    target.add(WCSRequestBuilderPanel.this);
  }
});