/*
* Copyright 2014 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.workbench.screens.guided.dtree.client.widget.elements;
import com.google.gwt.canvas.client.Canvas;
import com.google.gwt.canvas.dom.client.Context2d;
import com.google.gwt.canvas.dom.client.CssColor;
import com.google.gwt.i18n.client.DateTimeFormat;
import org.drools.workbench.models.guided.dtree.shared.model.nodes.ConstraintNode;
import org.drools.workbench.models.guided.dtree.shared.model.nodes.Node;
import org.drools.workbench.models.guided.dtree.shared.model.values.Value;
import org.drools.workbench.models.guided.dtree.shared.model.values.impl.DateValue;
import org.drools.workbench.models.guided.dtree.shared.model.values.impl.StringValue;
import org.drools.workbench.screens.guided.dtree.client.widget.model.Coordinate;
import org.kie.workbench.common.services.shared.preferences.ApplicationPreferences;
import org.uberfire.commons.validation.PortablePreconditions;
/**
* A UI element that represents a Constraint
*/
public class ConstraintNodeElement implements UIModelElement {
private static final String DROOLS_DATE_FORMAT = ApplicationPreferences.getDroolsDateFormat();
private static final DateTimeFormat DATE_FORMAT = DateTimeFormat.getFormat( DROOLS_DATE_FORMAT );
private static final int NODE_RADIUS = 15;
private Coordinate c;
private ConstraintNode node;
public ConstraintNodeElement( final Coordinate c,
final ConstraintNode node ) {
this.c = PortablePreconditions.checkNotNull( "c",
c );
this.node = PortablePreconditions.checkNotNull( "node",
node );
}
@Override
public void draw( final Canvas canvas ) {
final Context2d context = canvas.getContext2d();
context.setFillStyle( CssColor.make( 200, 100, 50 ) );
context.beginPath();
context.arc( c.getX(),
c.getY(),
NODE_RADIUS,
0,
Math.PI * 2.0,
true );
context.closePath();
context.fill();
context.setFont( "10pt sans-serif" );
context.setTextAlign( Context2d.TextAlign.CENTER );
context.setTextBaseline( Context2d.TextBaseline.MIDDLE );
context.setFillStyle( CssColor.make( 0, 0, 0 ) );
context.fillText( getConstraintNodeText( node ),
c.getX(),
c.getY() );
}
@Override
public Coordinate getCoordinate() {
return this.c;
}
@Override
public Node getNode() {
return this.node;
}
public int getRadius() {
return NODE_RADIUS;
}
private String getConstraintNodeText( final ConstraintNode node ) {
final StringBuilder sb = new StringBuilder();
sb.append( node.getFieldName() ).append( " " ).append( node.getOperator() ).append( " " ).append( getConstraintNodeValueText( node.getValue() ) );
return sb.toString();
}
private StringBuilder getConstraintNodeValueText( final Value value ) {
final StringBuilder sb = new StringBuilder();
if ( value instanceof StringValue ) {
final StringValue sv = (StringValue) value;
return sb.append( "\"" ).append( sv.getValue() ).append( "\"" );
} else if ( value instanceof DateValue ) {
final DateValue dv = (DateValue) value;
return sb.append( "\"" ).append( DATE_FORMAT.format( dv.getValue() ) ).append( "\"" );
}
return sb.append( value.getValue() );
}
}