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| /*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package test;
import java.text.MessageFormat;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.EventHandler;
import javafx.geometry.VPos;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Region;
import javafx.scene.layout.RegionBuilder;
import javafx.scene.paint.Color;
import javafx.scene.shape.Line;
import javafx.scene.text.Text;
import javafx.scene.transform.Rotate;
/**
* @author fabriceb
*/
public class VolumeButton extends Region {
private Region knob = RegionBuilder.create().id("knob").build(); // NOI18N.
private final double minAngle = -20;
private final double maxAngle = 200;
private Rotate rotate = new Rotate();
private Line currentLine = new Line();
private Line minLine = new Line();
private Line maxLine = new Line();
private Text text = new Text();
public VolumeButton() {
super();
getStyleClass().add("volume-button"); // NOI18N.
knob.setPrefSize(75, 75);
knob.getStyleClass().add("knob"); // NOI18N.
knob.getTransforms().add(rotate);
setOnMouseMoved(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
double x = event.getX();
double y = event.getY();
double centerX = getWidth() / 2.0;
double centerY = getHeight() / 2.0;
currentLine.setStartX(centerX);
currentLine.setStartY(centerY);
currentLine.setEndX(x);
currentLine.setEndY(y);
}
});
setOnMouseDragged(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
double x = event.getX();
double y = event.getY();
double centerX = getWidth() / 2.0;
double centerY = getHeight() / 2.0;
currentLine.setStartX(centerX);
currentLine.setStartY(centerY);
currentLine.setEndX(x);
currentLine.setEndY(y);
double theta = Math.atan2((y - centerY), (x - centerX));
double angle = Math.toDegrees(theta);
if (angle > 0.0) {
angle = 180 + (180 - angle);
} else {
angle = 180 - (180 - Math.abs(angle));
}
if (angle >= 270) {
angle = angle - 360;
}
double value = angleToValue(angle);
text.setText(MessageFormat.format("{0}\n{1}", angle, value));
setValue(value);
}
});
minLine.setStroke(Color.GREEN);
maxLine.setStroke(Color.BLUE);
text.setTextOrigin(VPos.TOP);
getChildren().addAll(minLine, maxLine);
getChildren().add(knob);
getChildren().addAll(currentLine, text);
setPrefSize(100, 100);
valueProperty().addListener(new ChangeListener<Number>() {
@Override
public void changed(ObservableValue<? extends Number> arg0, Number arg1, Number arg2) {
requestLayout();
}
});
minProperty().addListener(new ChangeListener<Number>() {
@Override
public void changed(ObservableValue<? extends Number> arg0, Number arg1, Number arg2) {
requestLayout();
}
});
maxProperty().addListener(new ChangeListener<Number>() {
@Override
public void changed(ObservableValue<? extends Number> arg0, Number arg1, Number arg2) {
requestLayout();
}
});
}
/**
* {@inheritDoc}
*/
@Override
protected void layoutChildren() {
super.layoutChildren();
double centerX = getWidth() / 2.0;
double centerY = getHeight() / 2.0;
currentLine.setStartX(centerX);
currentLine.setStartY(centerY);
minLine.setStartX(centerX);
minLine.setStartY(centerY);
minLine.setEndX(centerX + 90 * Math.cos(Math.toRadians(-minAngle)));
minLine.setEndY(centerY + 90 * Math.sin(Math.toRadians(-minAngle)));
maxLine.setStartX(centerX);
maxLine.setStartY(centerY);
maxLine.setEndX(centerX + 90 * Math.cos(Math.toRadians(-maxAngle)));
maxLine.setEndY(centerY + 90 * Math.sin(Math.toRadians(-maxAngle)));
double knobX = (getWidth() - knob.getPrefWidth()) / 2.0;
double knobY = (getHeight() - knob.getPrefHeight()) / 2.0;
knob.setLayoutX(knobX);
knob.setLayoutY(knobY);
double value = getValue();
double angle = valueToAngle(getValue());
if (minAngle <= angle && angle <= maxAngle) {
rotate.setPivotX(knob.getWidth() / 2.0);
rotate.setPivotY(knob.getHeight() / 2.0);
rotate.setAngle(-angle);
}
}
double valueToAngle(double value) {
double maxValue = getMax();
double minValue = getMin();
double angle = minAngle + (maxAngle - minAngle) * (value - minValue) / (maxValue - minValue);
System.out.printf("valueToAngle %f => %f", value, angle).println();
return angle;
}
double angleToValue(double angle) {
double maxValue = getMax();
double minValue = getMin();
double value = minValue + (maxValue - minValue) * (angle - minAngle) / (maxAngle - minAngle);
value = Math.max(minValue, value);
value = Math.min(maxValue, value);
System.out.printf("angleToValue %f => %f", angle, value).println();
return value;
}
//
private final DoubleProperty value = new SimpleDoubleProperty(this, "value", 0); // NOI18N.
public final void setValue(double v) {
value.set(v);
}
public final double getValue() {
return value.get();
}
public final DoubleProperty valueProperty() {
return value;
}
private final DoubleProperty min = new SimpleDoubleProperty(this, "min", 0); // NOI18N.
public final void setMin(double v) {
min.set(v);
}
public final double getMin() {
return min.get();
}
public final DoubleProperty minProperty() {
return min;
}
private final DoubleProperty max = new SimpleDoubleProperty(this, "max", 100); // NOI18N.
public final void setMax(double v) {
max.set(v);
}
public final double getMax() {
return max.get();
}
public final DoubleProperty maxProperty() {
return max;
}
} |
