AffineTransformPanel.java

/* (c) 2014 - 2016 Open Source Geospatial Foundation - all rights reserved
 * (c) 2001 - 2013 OpenPlans
 * This code is licensed under the GPL 2.0 license, available at the root
 * application directory.
 */
package org.geoserver.wcs.web.demo;

import java.awt.geom.AffineTransform;

import org.apache.wicket.markup.html.WebMarkupContainer;
import org.apache.wicket.markup.html.form.FormComponentPanel;
import org.apache.wicket.markup.html.form.TextField;
import org.apache.wicket.model.IModel;
import org.apache.wicket.model.Model;
import org.apache.wicket.model.PropertyModel;

/**
 * A form component for a {@link AffineTransform} object.
 *
 * @author Justin Deoliveira, OpenGeo
 * @author Andrea Aime, GeoSolutions
 */
public class AffineTransformPanel extends FormComponentPanel<AffineTransform> {

    Double scaleX,shearX,originX,scaleY,shearY,originY;
    private WebMarkupContainer originXContainer;
    private WebMarkupContainer shearXContainer;
    private WebMarkupContainer originYContainer;
    private WebMarkupContainer shearYContainer;
    private WebMarkupContainer newline;

    public AffineTransformPanel(String id ) {
        super(id);

        initComponents();
    }

    public AffineTransformPanel(String id, AffineTransform e) {
        this(id, new Model(e));
    }

    public AffineTransformPanel(String id, IModel model) {
        super(id, model);

        initComponents();
    }

    void initComponents() {
        updateFields();

        originXContainer = new WebMarkupContainer("originXContainer");
        add(originXContainer);
        newline = new WebMarkupContainer("newline");
        add(newline);
        shearXContainer = new WebMarkupContainer("shearXContainer");
        add(shearXContainer);
        originYContainer = new WebMarkupContainer("originYContainer");
        add(originYContainer);
        shearYContainer = new WebMarkupContainer("shearYContainer");
        add(shearYContainer);

        add( new TextField( "scaleX", new PropertyModel(this, "scaleX")) );
        shearXContainer.add( new TextField( "shearX", new PropertyModel(this, "shearX")) );
        originXContainer.add( new TextField( "originX", new PropertyModel(this, "originX")) );
        add( new TextField( "scaleY", new PropertyModel(this, "scaleY")) );
        shearYContainer.add( new TextField( "shearY", new PropertyModel(this, "shearY")) );
        originYContainer.add( new TextField( "originY", new PropertyModel(this, "originY")) );
    }

    @Override
    protected void onBeforeRender() {
        updateFields();
        super.onBeforeRender();
    }

    private void updateFields() {
        AffineTransform at = getModelObject();
        if(at != null) {
            this.scaleX = at.getScaleX();
            this.shearX = at.getShearX();
            this.originX = at.getTranslateX();
            this.scaleY = at.getScaleY();
            this.shearY = at.getShearY();
            this.originY = at.getTranslateY();
        }
    }

    public AffineTransformPanel setReadOnly( final boolean readOnly ) {
        visitChildren(TextField.class, (component, visit) -> {
            component.setEnabled( !readOnly );
        });

        return this;
    }

    @Override
    public void convertInput() {
        visitChildren(TextField.class, (component, visit) -> {
            ((TextField) component).processInput();
        });

        // update the grid envelope
        if(isResolutionModeEnabled() && scaleX != null && scaleY != null) {
            setConvertedInput(AffineTransform.getScaleInstance(scaleX, scaleY));
        } else if(scaleX != null && shearX != null && originX != null &&
           scaleY != null && shearY != null && originY != null) {
            setConvertedInput(new AffineTransform(scaleX, shearX, shearY, scaleY, originX, originY));
        } else {
            setConvertedInput(null);
        }
    }

    @Override
    protected void onModelChanged() {
        // when the client programmatically changed the model, update the fields
        // so that the textfields will change too
        updateFields();
        visitChildren(TextField.class, (component, visit) -> {
            ((TextField) component).clearInput();
        });
    }

    /**
     * Turns the editor in a pure resolution editor
     * @param enabled
     */
    public void setResolutionModeEnabled(boolean enabled) {
        shearXContainer.setVisible(!enabled);
        shearYContainer.setVisible(!enabled);
        originXContainer.setVisible(!enabled);
        originYContainer.setVisible(!enabled);
        newline.setVisible(!enabled);
    }

    public boolean isResolutionModeEnabled() {
        return !shearXContainer.isVisible();
    }
}