package eu.dzim.tests.fx;
import java.util.ArrayList;
import java.util.List;
import javafx.beans.Observable;
import javafx.beans.binding.Bindings;
import javafx.beans.binding.DoubleBinding;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ChangeListener;
import javafx.collections.FXCollections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.geometry.Insets;
import javafx.scene.control.Label;
import javafx.scene.layout.Background;
import javafx.scene.layout.BackgroundFill;
import javafx.scene.layout.CornerRadii;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
public class StackedHBox extends HBox {
private static final Color[] DEFAULT_COLORS = new Color[] { Color.AQUA, Color.AZURE, Color.YELLOW, Color.LIGHTYELLOW, Color.YELLOWGREEN,
Color.GREENYELLOW, Color.GREEN, Color.DARKGREEN, Color.ORANGERED, Color.RED };
private ObservableList<Entry> entries = FXCollections.observableArrayList();
private ObservableList<HBox> panes = FXCollections.observableArrayList();
private ListChangeListener<Entry> entriesChangeListener = this::entriesChanged;
private ListChangeListener<HBox> panesChangeListener = this::panesChanged;
public StackedHBox() {
entries.addListener(entriesChangeListener);
panes.addListener(panesChangeListener);
}
public ObservableList<Entry> getEntries() {
return entries;
}
private void entriesChanged(ListChangeListener.Change<? extends Entry> change) {
while (change.next()) {
for (Entry entry : change.getRemoved())
removeEntry(entry);
for (Entry entry : change.getAddedSubList())
addEntry(entry);
}
}
private void removeEntry(Entry entry) {
for (HBox pane : panes) {
if (pane.getUserData() != entry)
continue;
if (entry.customListener != null) {
entries.removeListener(entry.customListener);
entry.customListener = null;
}
panes.remove(pane);
}
}
private void addEntry(final Entry entry) {
final HBox box = new HBox();
box.setUserData(entry);
ListChangeListener<Entry> listener = (ListChangeListener<Entry>) change -> {
handleListChange(entry, box);
};
entry.customListener = listener;
entries.addListener(listener);
handleListChange(entry, box);
ChangeListener<Color> colorListener = (obs, o, n) -> {
BackgroundFill fill = new BackgroundFill(getColor(entry), CornerRadii.EMPTY, new Insets(0.0, 0.0, 0.0, 0.0));
Background bg = new Background(fill);
box.setBackground(bg);
};
entry.colorListener = colorListener;
colorListener.changed(entry.color, null, entry.getColor());
Label l = new Label();
l.textProperty().bind(entry.text);
box.getChildren().add(l);
panes.add(box);
}
private void handleListChange(final Entry entry, final HBox box) {
List<DoubleProperty> values = new ArrayList<>();
for (Entry e : entries) {
values.add(e.value);
}
List<Observable> bindings = new ArrayList<>();
bindings.add(widthProperty());
bindings.addAll(values);
DoubleBinding widthBinding = Bindings.createDoubleBinding(() -> {
int sum = 0;
for (Entry e : entries)
sum += e.value.get();
final double percentage;
if (sum == 0)
percentage = 0.0;
else
percentage = entry.value.get() / sum;
return getWidth() * percentage;
}, bindings.toArray(new Observable[values.size()]));
box.minWidthProperty().bind(widthBinding);
box.maxWidthProperty().bind(widthBinding);
}
private Color getColor(Entry entry) {
int index = entries.indexOf(entry);
Color color = entry.color.get() == null ? DEFAULT_COLORS[index % entries.size()] : entry.color.get();
return color;
}
private void panesChanged(ListChangeListener.Change<? extends HBox> change) {
while (change.next()) {
for (HBox pane : change.getRemoved())
getChildren().remove(pane);
for (HBox pane : change.getAddedSubList())
getChildren().add(pane);
}
}
public static class Entry {
private DoubleProperty value = new SimpleDoubleProperty(0.0);
private ObjectProperty<Color> color = new SimpleObjectProperty<>(null);
private StringProperty text = new SimpleStringProperty(null);
private ListChangeListener<Entry> customListener = null;
private ChangeListener<Color> colorListener = null;
public Entry(double value) {
this.value.set(value);
}
public Entry(double value, Color color) {
this(value);
this.color.set(color);
}
public Entry(double value, Color color, String text) {
this(value, color);
this.text.set(text);
}
public final DoubleProperty valueProperty() {
return this.value;
}
public final double getValue() {
return this.valueProperty().get();
}
public final void setValue(final double value) {
this.valueProperty().set(value);
}
public final ObjectProperty<Color> colorProperty() {
return this.color;
}
public final Color getColor() {
return this.colorProperty().get();
}
public final void setColor(final Color color) {
this.colorProperty().set(color);
}
public final StringProperty textProperty() {
return this.text;
}
public final String getText() {
return this.textProperty().get();
}
public final void setText(final String text) {
this.textProperty().set(text);
}
public ListChangeListener<Entry> getCustomListener() {
return customListener;
}
public void setCustomListener(ListChangeListener<Entry> customListener) {
this.customListener = customListener;
}
public ChangeListener<Color> getColorListener() {
return colorListener;
}
public void setColorListener(ChangeListener<Color> colorListener) {
this.colorListener = colorListener;
}
}
}
