Hi,
I'm trying to build a chart program using presentation model. Using JGoodies for data binding was relatively easy for simple types like strings or numbers. But I can't figure out how to use it on a hashmap.
I'll try to explain how the chart works and what my problem is:
A chart consists of DataSeries, a DataSeries consists of DataPoints. I want to have a data model and to be able to use different views on the same model (e.g. bar chart, pie chart,...). Each of them consists of three classes.
For example:
DataPointModel: holds the data model (value, label, category)
DataPointViewModel: extends JGoodies PresentationModel. wraps around DataPointModel and holds view properties like font and color.
DataPoint: abstract class, extends JComponent. Different Views must subclass and implement their own ui.
Binding and creating the data model was easy, but i don't know how to bind my data series model.
package at.onscreen.chart;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.beans.PropertyVetoException;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
public class DataSeriesModel {
public static String PROPERTY_DATAPOINT = "dataPoint";
public static String PROPERTY_DATAPOINTS = "dataPoints";
public static String PROPERTY_LABEL = "label";
public static String PROPERTY_MAXVALUE = "maxValue";
/**
* holds the data points
*/
private HashMap dataPoints;
/**
* the label for the data series
*/
private String label;
/**
* the maximum data point value
*/
private Double maxValue;
/**
* the model supports property change notification
*/
private PropertyChangeSupport propertyChangeSupport;
/**
* default constructor
*/
public DataSeriesModel() {
this.maxValue = Double.valueOf(0);
this.dataPoints = new HashMap();
this.propertyChangeSupport = new PropertyChangeSupport(this);
}
/**
* constructor
* @param label - the series label
*/
public DataSeriesModel(String label) {
this.dataPoints = new HashMap();
this.maxValue = Double.valueOf(0);
this.label = label;
this.propertyChangeSupport = new PropertyChangeSupport(this);
}
/**
* full constructor
* @param label - the series label
* @param dataPoints - an array of data points
*/
public DataSeriesModel(String label, DataPoint[] dataPoints) {
this.dataPoints = new HashMap();
this.propertyChangeSupport = new PropertyChangeSupport(this);
this.maxValue = Double.valueOf(0);
this.label = label;
for (int i = 0; i < dataPoints.length; i++) {
this.addDataPoint(dataPoints[i]);
}
}
/**
* full constructor
* @param label - the series label
* @param dataPoints - a collection of data points
*/
public DataSeriesModel(String label, Collection dataPoints) {
this.dataPoints = new HashMap();
this.propertyChangeSupport = new PropertyChangeSupport(this);
this.maxValue = Double.valueOf(0);
this.label = label;
for (Iterator it = dataPoints.iterator(); it.hasNext();) {
this.addDataPoint(it.next());
}
}
/**
* adds a new data point to the series. if the series contains a data point with same id, it will be replaced by the new one.
* @param dataPoint - the data point
*/
public void addDataPoint(DataPoint dataPoint) {
String category = dataPoint.getCategory();
DataPoint oldDataPoint = this.getDataPoint(category);
this.dataPoints.put(category, dataPoint);
this.setMaxValue(Math.max(this.maxValue, dataPoint.getValue()));
this.propertyChangeSupport.firePropertyChange(PROPERTY_DATAPOINT, oldDataPoint, dataPoint);
}
/**
* returns the data point with given id or null if not found
* @param uid - the id of the data point
* @return the data point or null if there is no such point in the table
*/
public DataPoint getDataPoint(String category) {
return this.dataPoints.get(category);
}
/**
* removes the data point with given id from the series, if present
* @param category - the data point to remove
*/
public void removeDataPoint(String category) {
DataPoint dataPoint = this.getDataPoint(category);
this.dataPoints.remove(category);
if (dataPoint != null) {
if (dataPoint.getValue() == this.getMaxValue()) {
Double maxValue = Double.valueOf(0);
for (Iterator it = this.iterator(); it.hasNext();) {
DataPoint itDataPoint = it.next();
maxValue = Math.max(itDataPoint.getValue(), maxValue);
}
this.setMaxValue(maxValue);
}
}
this.propertyChangeSupport.firePropertyChange(PROPERTY_DATAPOINT, dataPoint, null);
}
/**
* removes all data points from the series
* @throws PropertyVetoException
*/
public void removeAll() {
this.setMaxValue(Double.valueOf(0));
this.dataPoints.clear();
this.propertyChangeSupport.firePropertyChange(PROPERTY_DATAPOINTS, this.getDataPoints(), null);
}
/**
* returns the maximum of all data point values
* @return the maximum of all data points
*/
public Double getMaxValue() {
return this.maxValue;
}
/**
* sets the max value
* @param maxValue - the max value
*/
protected void setMaxValue(Double maxValue) {
Double oldMaxValue = this.getMaxValue();
this.maxValue = maxValue;
this.propertyChangeSupport.firePropertyChange(PROPERTY_MAXVALUE, oldMaxValue, maxValue);
}
/**
* returns true if there is a data point with given category
* @param category - the data point category
* @return true if there is a data point with given category, otherwise false
*/
public boolean contains(String category) {
return this.dataPoints.containsKey(category);
}
/**
* returns the label for the series
* @return the label for the series
*/
public String getLabel() {
return this.label;
}
/**
* returns an iterator over the data points
* @return an iterator over the data points
*/
public Iterator iterator() {
return this.dataPoints.values().iterator();
}
/**
* returns a collection of the data points. the collection supports removal, but does not support adding of data points.
* @return a collection of data points
*/
public Collection getDataPoints() {
return this.dataPoints.values();
}
/**
* returns the number of data points in the series
* @return the number of data points
*/
public int getSize() {
return this.dataPoints.size();
}
/**
* adds a PropertyChangeListener
* @param listener - the listener
*/
public void addPropertyChangeListener(PropertyChangeListener listener) {
this.propertyChangeSupport.addPropertyChangeListener(listener);
}
/**
* removes a PropertyChangeListener
* @param listener - the listener
*/
public void removePropertyChangeListener(PropertyChangeListener listener) {
this.propertyChangeSupport.removePropertyChangeListener(listener);
}
}
package at.onscreen.chart;
import java.beans.PropertyVetoException;
import java.util.Collection;
import java.util.Iterator;
import com.jgoodies.binding.PresentationModel;
public class DataSeriesViewModel extends PresentationModel {
/**
* default constructor
*/
public DataSeriesViewModel() {
super(new DataSeriesModel());
}
/**
* constructor
* @param label - the series label
*/
public DataSeriesViewModel(String label) {
super(new DataSeriesModel(label));
}
/**
* full constructor
* @param label - the series label
* @param dataPoints - an array of data points
*/
public DataSeriesViewModel(String label, DataPoint[] dataPoints) {
super(new DataSeriesModel(label, dataPoints));
}
/**
* full constructor
* @param label - the series label
* @param dataPoints - a collection of data points
*/
public DataSeriesViewModel(String label, Collection dataPoints) {
super(new DataSeriesModel(label, dataPoints));
}
/**
* full constructor
* @param model - the data series model
*/
public DataSeriesViewModel(DataSeriesModel model) {
super(model);
}
/**
* adds a data point to the series
* @param dataPoint - the data point
*/
public void addDataPoint(DataPoint dataPoint) {
this.getBean().addDataPoint(dataPoint);
}
/**
* returns true if there is a data point with given category
* @param category - the data point category
* @return true if there is a data point with given category, otherwise false
*/
public boolean contains(String category) {
return this.getBean().contains(category);
}
/**
* returns the data point with given id or null if not found
* @param uid - the id of the data point
* @return the data point or null if there is no such point in the table
*/
public DataPoint getDataPoint(String category) {
return this.getBean().getDataPoint(category);
}
/**
* returns a collection of the data points. the collection supports removal, but does not support adding of data points.
* @return a collection of data points
*/
public Collection getDataPoints() {
return this.getBean().getDataPoints();
}
/**
* returns the label for the series
* @return the label for the series
*/
public String getLabel() {
return this.getBean().getLabel();
}
/**
* sets the max value
* @param maxValue - the max value
*/
public Double getMaxValue() {
return this.getBean().getMaxValue();
}
/**
* returns the number of data points in the series
* @return the number of data points
*/
public int getSize() {
return this.getBean().getSize();
}
/**
* returns an iterator over the data points
* @return an iterator over the data points
*/
public Iterator iterator() {
return this.getBean().iterator();
}
/**
* removes all data points from the series
* @throws PropertyVetoException
*/
public void removeAll() {
this.getBean().removeAll();
}
/**
* removes the data point with given id from the series, if present
* @param category - the data point to remove
*/
public void removeDataPoint(String category) {
this.getBean().removeDataPoint(category);
}
}
package at.onscreen.chart;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyVetoException;
import java.util.Collection;
import java.util.Iterator;
import javax.swing.JComponent;
public abstract class DataSeries extends JComponent implements PropertyChangeListener {
/**
* the model
*/
private DataSeriesViewModel model;
/**
* default constructor
*/
public DataSeries() {
this.model = new DataSeriesViewModel();
this.model.addPropertyChangeListener(this);
this.createComponents();
}
/**
* constructor
* @param label - the series label
*/
public DataSeries(String label) {
this.model = new DataSeriesViewModel(label);
this.model.addPropertyChangeListener(this);
this.createComponents();
}
/**
* full constructor
* @param label - the series label
* @param dataPoints - an array of data points
*/
public DataSeries(String label, DataPoint[] dataPoints) {
this.model = new DataSeriesViewModel(label, dataPoints);
this.model.addPropertyChangeListener(this);
this.createComponents();
}
/**
* full constructor
* @param label - the series label
* @param dataPoints - a collection of data points
*/
public DataSeries(String label, Collection dataPoints) {
this.model = new DataSeriesViewModel(label, dataPoints);
this.model.addPropertyChangeListener(this);
this.createComponents();
}
/**
* full constructor
* @param model - the model
*/
public DataSeries(DataSeriesViewModel model) {
this.model = model;
this.model.addPropertyChangeListener(this);
this.createComponents();
}
/**
* creates, binds and configures UI components.
* data point properties can be created here as components or be painted in paintComponent.
*/
protected abstract void createComponents();
@Override
public void propertyChange(PropertyChangeEvent evt) {
this.repaint();
}
/**
* adds a data point to the series
* @param dataPoint - the data point
*/
public void addDataPoint(DataPoint dataPoint) {
this.model.addDataPoint(dataPoint);
}
/**
* returns true if there is a data point with given category
* @param category - the data point category
* @return true if there is a data point with given category, otherwise false
*/
public boolean contains(String category) {
return this.model.contains(category);
}
/**
* returns the data point with given id or null if not found
* @param uid - the id of the data point
* @return the data point or null if there is no such point in the table
*/
public DataPoint getDataPoint(String category) {
return this.model.getDataPoint(category);
}
/**
* returns a collection of the data points. the collection supports removal, but does not support adding of data points.
* @return a collection of data points
*/
public Collection getDataPoints() {
return this.model.getDataPoints();
}
/**
* returns the label for the series
* @return the label for the series
*/
public String getLabel() {
return this.model.getLabel();
}
/**
* sets the max value
* @param maxValue - the max value
*/
public Double getMaxValue() {
return this.model.getMaxValue();
}
/**
* returns the number of data points in the series
* @return the number of data points
*/
public int getDataPointCount() {
return this.model.getSize();
}
/**
* returns an iterator over the data points
* @return an iterator over the data points
*/
public Iterator iterator() {
return this.model.iterator();
}
/**
* removes all data points from the series
* @throws PropertyVetoException
*/
public void removeAll() {
this.model.removeAll();
}
/**
* removes the data point with given id from the series, if present
* @param category - the data point to remove
*/
public void removeDataPoint(String category) {
this.model.removeDataPoint(category);
}
/**
* returns the data series view model
* @return - the data series view model
*/
public DataSeriesViewModel getViewModel() {
return this.model;
}
/**
* returns the data series model
* @return - the data series model
*/
public DataSeriesModel getModel() {
return this.model.getBean();
}
}
package at.onscreen.chart.builder;
import java.util.Collection;
import net.miginfocom.swing.MigLayout;
import at.onscreen.chart.DataPoint;
import at.onscreen.chart.DataSeries;
import at.onscreen.chart.DataSeriesViewModel;
public class BuilderDataSeries extends DataSeries {
/**
* default constructor
*/
public BuilderDataSeries() {
super();
}
/**
* constructor
* @param label - the series label
*/
public BuilderDataSeries(String label) {
super(label);
}
/**
* full constructor
* @param label - the series label
* @param dataPoints - an array of data points
*/
public BuilderDataSeries(String label, DataPoint[] dataPoints) {
super(label, dataPoints);
}
/**
* full constructor
* @param label - the series label
* @param dataPoints - a collection of data points
*/
public BuilderDataSeries(String label, Collection dataPoints) {
super(label, dataPoints);
}
/**
* full constructor
* @param model - the model
*/
public BuilderDataSeries(DataSeriesViewModel model) {
super(model);
}
@Override
protected void createComponents() {
this.setLayout(new MigLayout());
/*
*
* I want to add a new BuilderDataPoint for each data point in the model.
* I want the BuilderDataPoints to be synchronized with the model.
* e.g. when a data point is removed from the model, the BuilderDataPoint shall be removed
* from the BuilderDataSeries
*
*/
}
}
package at.onscreen.chart.builder;
import javax.swing.JFormattedTextField;
import javax.swing.JTextField;
import at.onscreen.chart.DataPoint;
import at.onscreen.chart.DataPointModel;
import at.onscreen.chart.DataPointViewModel;
import at.onscreen.chart.ValueFormat;
import com.jgoodies.binding.adapter.BasicComponentFactory;
import com.jgoodies.binding.beans.BeanAdapter;
public class BuilderDataPoint extends DataPoint {
/**
* default constructor
*/
public BuilderDataPoint() {
super();
}
/**
* constructor
* @param category - the category
*/
public BuilderDataPoint(String category) {
super(category);
}
/**
* constructor
* @param value - the value
* @param label - the label
* @param category - the category
*/
public BuilderDataPoint(Double value, String label, String category) {
super(value, label, category);
}
/**
* full constructor
* @param model - the model
*/
public BuilderDataPoint(DataPointViewModel model) {
super(model);
}
@Override
protected void createComponents() {
BeanAdapter beanAdapter = new BeanAdapter(this.getModel(), true);
ValueFormat format = new ValueFormat();
JFormattedTextField value = BasicComponentFactory.createFormattedTextField(beanAdapter.getValueModel(DataPointModel.PROPERTY_VALUE), format);
this.add(value, "w 80, growx, wrap");
JTextField label = BasicComponentFactory.createTextField(beanAdapter.getValueModel(DataPointModel.PROPERTY_LABEL));
this.add(label, "growx, wrap");
JTextField category = BasicComponentFactory.createTextField(beanAdapter.getValueModel(DataPointModel.PROPERTY_CATEGORY));
this.add(category, "growx, wrap");
}
}
To sum it up: I need to know how to bind a hash map property to JComponent.components property. JGoodies is in my opinion not very well documented, I spent a long time searching through the internet, but I did not find any solution to my problem.
Hope you can help me.
