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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package javafx.scene.control.skin;

import com.sun.javafx.scene.NodeHelper;
import com.sun.javafx.scene.control.skin.Utils;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javafx.animation.Animation;
import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.ObjectProperty;
import javafx.beans.value.WritableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.geometry.NodeOrientation;
import javafx.geometry.VPos;
import javafx.scene.Node;
import javafx.scene.control.Control;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.control.SkinBase;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Region;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.paint.Paint;
import javafx.scene.shape.Arc;
import javafx.scene.shape.ArcType;
import javafx.scene.shape.Circle;
import javafx.scene.text.Text;
import javafx.scene.text.TextBoundsType;
import javafx.scene.transform.Scale;
import javafx.util.Duration;
import javafx.css.CssMetaData;
import javafx.css.StyleableObjectProperty;
import javafx.css.StyleableProperty;
import javafx.css.StyleableBooleanProperty;
import javafx.css.StyleableIntegerProperty;
import javafx.css.converter.BooleanConverter;
import javafx.css.converter.PaintConverter;
import javafx.css.converter.SizeConverter;
import com.sun.javafx.scene.control.skin.resources.ControlResources;
import javafx.css.Styleable;

Default skin implementation for the ProgressIndicator control.
See Also:
Since:9
/** * Default skin implementation for the {@link ProgressIndicator} control. * * @see ProgressIndicator * @since 9 */
public class ProgressIndicatorSkin extends SkinBase<ProgressIndicator> { /*************************************************************************** * * * Static fields * * * **************************************************************************/ /*************************************************************************** * * * Private fields * * * **************************************************************************/ // JDK-8149818: This constant should not be static, because the // Locale may change between instances.
DONE string is just used to know the size of Done as that is the biggest text we need to allow for
/** DONE string is just used to know the size of Done as that is the biggest text we need to allow for */
private final String DONE = ControlResources.getString("ProgressIndicator.doneString"); final Duration CLIPPED_DELAY = new Duration(300); final Duration UNCLIPPED_DELAY = new Duration(0); private IndeterminateSpinner spinner; private DeterminateIndicator determinateIndicator; private ProgressIndicator control; Animation indeterminateTransition; /*************************************************************************** * * * Constructors * * * **************************************************************************/
Creates a new ProgressIndicatorSkin instance, installing the necessary child nodes into the Control children list.
Params:
  • control – The control that this skin should be installed onto.
/** * Creates a new ProgressIndicatorSkin instance, installing the necessary child * nodes into the Control {@link Control#getChildren() children} list. * * @param control The control that this skin should be installed onto. */
public ProgressIndicatorSkin(ProgressIndicator control) { super(control); this.control = control; // register listeners registerChangeListener(control.indeterminateProperty(), e -> initialize()); registerChangeListener(control.progressProperty(), e -> updateProgress()); registerChangeListener(NodeHelper.treeShowingProperty(control), e -> updateAnimation()); registerChangeListener(control.sceneProperty(), e->updateAnimation()); initialize(); updateAnimation(); } /*************************************************************************** * * * Properties * * * **************************************************************************/
The colour of the progress segment.
/** * The colour of the progress segment. */
private ObjectProperty<Paint> progressColor = new StyleableObjectProperty<Paint>(null) { @Override protected void invalidated() { final Paint value = get(); if (value != null && !(value instanceof Color)) { if (isBound()) { unbind(); } set(null); throw new IllegalArgumentException("Only Color objects are supported"); } if (spinner!=null) spinner.setFillOverride(value); if (determinateIndicator!=null) determinateIndicator.setFillOverride(value); } @Override public Object getBean() { return ProgressIndicatorSkin.this; } @Override public String getName() { return "progressColorProperty"; } @Override public CssMetaData<ProgressIndicator,Paint> getCssMetaData() { return PROGRESS_COLOR; } }; Paint getProgressColor() { return progressColor.get(); }
The number of segments in the spinner.
/** * The number of segments in the spinner. */
private IntegerProperty indeterminateSegmentCount = new StyleableIntegerProperty(8) { @Override protected void invalidated() { if (spinner!=null) spinner.rebuild(); } @Override public Object getBean() { return ProgressIndicatorSkin.this; } @Override public String getName() { return "indeterminateSegmentCount"; } @Override public CssMetaData<ProgressIndicator,Number> getCssMetaData() { return INDETERMINATE_SEGMENT_COUNT; } };
True if the progress indicator should rotate as well as animate opacity.
/** * True if the progress indicator should rotate as well as animate opacity. */
private final BooleanProperty spinEnabled = new StyleableBooleanProperty(false) { @Override protected void invalidated() { if (spinner!=null) spinner.setSpinEnabled(get()); } @Override public CssMetaData<ProgressIndicator,Boolean> getCssMetaData() { return SPIN_ENABLED; } @Override public Object getBean() { return ProgressIndicatorSkin.this; } @Override public String getName() { return "spinEnabled"; } }; /*************************************************************************** * * * Public API * * * **************************************************************************/
{@inheritDoc}
/** {@inheritDoc} */
@Override public void dispose() { super.dispose(); if (indeterminateTransition != null) { indeterminateTransition.stop(); indeterminateTransition = null; } if (spinner != null) { spinner = null; } control = null; }
{@inheritDoc}
/** {@inheritDoc} */
@Override protected void layoutChildren(final double x, final double y, final double w, final double h) { if (spinner != null && control.isIndeterminate()) { spinner.layoutChildren(); spinner.resizeRelocate(0, 0, w, h); } else if (determinateIndicator != null) { determinateIndicator.layoutChildren(); determinateIndicator.resizeRelocate(0, 0, w, h); } }
{@inheritDoc}
/** {@inheritDoc} */
@Override protected double computeMinWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) { double minWidth = 0.0; if (spinner != null && control.isIndeterminate()) { minWidth = spinner.minWidth(-1); } else if (determinateIndicator != null) { minWidth = determinateIndicator.minWidth(-1); } return minWidth; }
{@inheritDoc}
/** {@inheritDoc} */
@Override protected double computeMinHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) { double minHeight = 0.0; if (spinner != null && control.isIndeterminate()) { minHeight = spinner.minHeight(-1); } else if (determinateIndicator != null) { minHeight = determinateIndicator.minHeight(-1); } return minHeight; }
{@inheritDoc}
/** {@inheritDoc} */
@Override protected double computePrefWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) { double prefWidth = 0.0; if (spinner != null && control.isIndeterminate()) { prefWidth = spinner.prefWidth(height); } else if (determinateIndicator != null) { prefWidth = determinateIndicator.prefWidth(height); } return prefWidth; }
{@inheritDoc}
/** {@inheritDoc} */
@Override protected double computePrefHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) { double prefHeight = 0.0; if (spinner != null && control.isIndeterminate()) { prefHeight = spinner.prefHeight(width); } else if (determinateIndicator != null) { prefHeight = determinateIndicator.prefHeight(width); } return prefHeight; }
{@inheritDoc}
/** {@inheritDoc} */
@Override protected double computeMaxWidth(double height, double topInset, double rightInset, double bottomInset, double leftInset) { return computePrefWidth(height, topInset, rightInset, bottomInset, leftInset); }
{@inheritDoc}
/** {@inheritDoc} */
@Override protected double computeMaxHeight(double width, double topInset, double rightInset, double bottomInset, double leftInset) { return computePrefHeight(width, topInset, rightInset, bottomInset, leftInset); }
* Private implementation * *
/*************************************************************************** * * * Private implementation * * * **************************************************************************/
void initialize() { boolean isIndeterminate = control.isIndeterminate(); if (isIndeterminate) { // clean up determinateIndicator determinateIndicator = null; // create spinner spinner = new IndeterminateSpinner(spinEnabled.get(), progressColor.get()); getChildren().setAll(spinner); if (NodeHelper.isTreeShowing(control)) { if (indeterminateTransition != null) { indeterminateTransition.play(); } } } else { // clean up after spinner if (spinner != null) { if (indeterminateTransition != null) { indeterminateTransition.stop(); } spinner = null; } // create determinateIndicator determinateIndicator = new DeterminateIndicator(control, this, progressColor.get()); getChildren().setAll(determinateIndicator); } } void updateProgress() { if (determinateIndicator != null) { determinateIndicator.updateProgress(control.getProgress()); } } void createIndeterminateTimeline() { if (spinner != null) { spinner.rebuildTimeline(); } } void pauseTimeline(boolean pause) { if (getSkinnable().isIndeterminate()) { if (indeterminateTransition == null) { createIndeterminateTimeline(); } if (pause) { indeterminateTransition.pause(); } else { indeterminateTransition.play(); } } } void updateAnimation() { ProgressIndicator control = getSkinnable(); final boolean isTreeShowing = NodeHelper.isTreeShowing(control) && control.getScene() != null; if (indeterminateTransition != null) { pauseTimeline(!isTreeShowing); } else if (isTreeShowing) { createIndeterminateTimeline(); } }
* Stylesheet Handling * *
/*************************************************************************** * * * Stylesheet Handling * * * **************************************************************************/
private static final CssMetaData<ProgressIndicator,Paint> PROGRESS_COLOR = new CssMetaData<ProgressIndicator,Paint>("-fx-progress-color", PaintConverter.getInstance(), null) { @Override public boolean isSettable(ProgressIndicator n) { final ProgressIndicatorSkin skin = (ProgressIndicatorSkin) n.getSkin(); return skin.progressColor == null || !skin.progressColor.isBound(); } @Override public StyleableProperty<Paint> getStyleableProperty(ProgressIndicator n) { final ProgressIndicatorSkin skin = (ProgressIndicatorSkin) n.getSkin(); return (StyleableProperty<Paint>)(WritableValue<Paint>)skin.progressColor; } }; private static final CssMetaData<ProgressIndicator,Number> INDETERMINATE_SEGMENT_COUNT = new CssMetaData<ProgressIndicator,Number>("-fx-indeterminate-segment-count", SizeConverter.getInstance(), 8) { @Override public boolean isSettable(ProgressIndicator n) { final ProgressIndicatorSkin skin = (ProgressIndicatorSkin) n.getSkin(); return skin.indeterminateSegmentCount == null || !skin.indeterminateSegmentCount.isBound(); } @Override public StyleableProperty<Number> getStyleableProperty(ProgressIndicator n) { final ProgressIndicatorSkin skin = (ProgressIndicatorSkin) n.getSkin(); return (StyleableProperty<Number>)(WritableValue<Number>)skin.indeterminateSegmentCount; } }; private static final CssMetaData<ProgressIndicator,Boolean> SPIN_ENABLED = new CssMetaData<ProgressIndicator,Boolean>("-fx-spin-enabled", BooleanConverter.getInstance(), Boolean.FALSE) { @Override public boolean isSettable(ProgressIndicator node) { final ProgressIndicatorSkin skin = (ProgressIndicatorSkin) node.getSkin(); return skin.spinEnabled == null || !skin.spinEnabled.isBound(); } @Override public StyleableProperty<Boolean> getStyleableProperty(ProgressIndicator node) { final ProgressIndicatorSkin skin = (ProgressIndicatorSkin) node.getSkin(); return (StyleableProperty<Boolean>)(WritableValue<Boolean>)skin.spinEnabled; } }; private static final List<CssMetaData<? extends Styleable, ?>> STYLEABLES; static { final List<CssMetaData<? extends Styleable, ?>> styleables = new ArrayList<CssMetaData<? extends Styleable, ?>>(SkinBase.getClassCssMetaData()); styleables.add(PROGRESS_COLOR); styleables.add(INDETERMINATE_SEGMENT_COUNT); styleables.add(SPIN_ENABLED); STYLEABLES = Collections.unmodifiableList(styleables); }
Returns the CssMetaData associated with this class, which may include the CssMetaData of its superclasses.
Returns:the CssMetaData associated with this class, which may include the CssMetaData of its superclasses
/** * Returns the CssMetaData associated with this class, which may include the * CssMetaData of its superclasses. * @return the CssMetaData associated with this class, which may include the * CssMetaData of its superclasses */
public static List<CssMetaData<? extends Styleable, ?>> getClassCssMetaData() { return STYLEABLES; }
{@inheritDoc}
/** * {@inheritDoc} */
@Override public List<CssMetaData<? extends Styleable, ?>> getCssMetaData() { return getClassCssMetaData(); }
* Support classes * *
/*************************************************************************** * * * Support classes * * * **************************************************************************/
private final class DeterminateIndicator extends Region { private double textGap = 2.0F; // only update progress text on whole percentages private int intProgress; // only update pie arc to nearest degree private int degProgress; private Text text; private StackPane indicator; private StackPane progress; private StackPane tick; private Arc arcShape; private Circle indicatorCircle; private double doneTextWidth; private double doneTextHeight; public DeterminateIndicator(ProgressIndicator control, ProgressIndicatorSkin s, Paint fillOverride) { getStyleClass().add("determinate-indicator"); intProgress = (int) Math.round(control.getProgress() * 100.0) ; degProgress = (int) (360 * control.getProgress()); getChildren().clear(); text = new Text((control.getProgress() >= 1) ? (DONE) : ("" + intProgress + "%")); text.setTextOrigin(VPos.TOP); text.getStyleClass().setAll("text", "percentage"); registerChangeListener(text.fontProperty(), o -> { doneTextWidth = Utils.computeTextWidth(text.getFont(), DONE, 0); doneTextHeight = Utils.computeTextHeight(text.getFont(), DONE, 0, TextBoundsType.LOGICAL_VERTICAL_CENTER); }); // The circular background for the progress pie piece indicator = new StackPane(); indicator.setScaleShape(false); indicator.setCenterShape(false); indicator.getStyleClass().setAll("indicator"); indicatorCircle = new Circle(); indicator.setShape(indicatorCircle); // The shape for our progress pie piece arcShape = new Arc(); arcShape.setType(ArcType.ROUND); arcShape.setStartAngle(90.0F); // Our progress pie piece progress = new StackPane(); progress.getStyleClass().setAll("progress"); progress.setScaleShape(false); progress.setCenterShape(false); progress.setShape(arcShape); progress.getChildren().clear(); setFillOverride(fillOverride); // The check mark that's drawn at 100% tick = new StackPane(); tick.getStyleClass().setAll("tick"); getChildren().setAll(indicator, progress, text, tick); updateProgress(control.getProgress()); } private void setFillOverride(Paint fillOverride) { if (fillOverride instanceof Color) { Color c = (Color)fillOverride; progress.setStyle("-fx-background-color: rgba("+((int)(255*c.getRed()))+","+((int)(255*c.getGreen()))+","+((int)(255*c.getBlue()))+","+c.getOpacity()+");"); } else { progress.setStyle(null); } } @Override public boolean usesMirroring() { // This is used instead of setting NodeOrientation, // allowing the Text node to inherit the current // orientation. return false; } private void updateProgress(double progress) { intProgress = (int) Math.round(progress * 100.0) ; text.setText((progress >= 1) ? (DONE) : ("" + intProgress + "%")); degProgress = (int) (360 * progress); arcShape.setLength(-degProgress); requestLayout(); } @Override protected void layoutChildren() { // Position and size the circular background final double left = control.snappedLeftInset(); final double right = control.snappedRightInset(); final double top = control.snappedTopInset(); final double bottom = control.snappedBottomInset(); /* ** use the min of width, or height, keep it a circle */ final double areaW = control.getWidth() - left - right; final double areaH = control.getHeight() - top - bottom - textGap - doneTextHeight; final double radiusW = areaW / 2; final double radiusH = areaH / 2; final double radius = Math.floor(Math.min(radiusW, radiusH)); final double centerX = snapPosition(left + radiusW); final double centerY = snapPosition(top + radius); // find radius that fits inside radius - insetsPadding final double iLeft = indicator.snappedLeftInset(); final double iRight = indicator.snappedRightInset(); final double iTop = indicator.snappedTopInset(); final double iBottom = indicator.snappedBottomInset(); final double progressRadius = snapSize(Math.min( Math.min(radius - iLeft, radius - iRight), Math.min(radius - iTop, radius - iBottom))); indicatorCircle.setRadius(radius); indicator.setLayoutX(centerX); indicator.setLayoutY(centerY); arcShape.setRadiusX(progressRadius); arcShape.setRadiusY(progressRadius); progress.setLayoutX(centerX); progress.setLayoutY(centerY); // find radius that fits inside progressRadius - progressInsets final double pLeft = progress.snappedLeftInset(); final double pRight = progress.snappedRightInset(); final double pTop = progress.snappedTopInset(); final double pBottom = progress.snappedBottomInset(); final double indicatorRadius = snapSize(Math.min( Math.min(progressRadius - pLeft, progressRadius - pRight), Math.min(progressRadius - pTop, progressRadius - pBottom))); // find size of spare box that fits inside indicator radius double squareBoxHalfWidth = Math.ceil(Math.sqrt((indicatorRadius * indicatorRadius) / 2)); tick.setLayoutX(centerX - squareBoxHalfWidth); tick.setLayoutY(centerY - squareBoxHalfWidth); tick.resize(squareBoxHalfWidth + squareBoxHalfWidth, squareBoxHalfWidth + squareBoxHalfWidth); tick.setVisible(control.getProgress() >= 1); // if the % text can't fit anywhere in the bounds then don't display it double textWidth = text.getLayoutBounds().getWidth(); double textHeight = text.getLayoutBounds().getHeight(); if (control.getWidth() >= textWidth && control.getHeight() >= textHeight) { if (!text.isVisible()) text.setVisible(true); text.setLayoutY(snapPosition(centerY + radius + textGap)); text.setLayoutX(snapPosition(centerX - (textWidth/2))); } else { if (text.isVisible()) text.setVisible(false); } } @Override protected double computePrefWidth(double height) { final double left = control.snappedLeftInset(); final double right = control.snappedRightInset(); final double iLeft = indicator.snappedLeftInset(); final double iRight = indicator.snappedRightInset(); final double iTop = indicator.snappedTopInset(); final double iBottom = indicator.snappedBottomInset(); final double indicatorMax = snapSize(Math.max(Math.max(iLeft, iRight), Math.max(iTop, iBottom))); final double pLeft = progress.snappedLeftInset(); final double pRight = progress.snappedRightInset(); final double pTop = progress.snappedTopInset(); final double pBottom = progress.snappedBottomInset(); final double progressMax = snapSize(Math.max(Math.max(pLeft, pRight), Math.max(pTop, pBottom))); final double tLeft = tick.snappedLeftInset(); final double tRight = tick.snappedRightInset(); final double indicatorWidth = indicatorMax + progressMax + tLeft + tRight + progressMax + indicatorMax; return left + Math.max(indicatorWidth, doneTextWidth) + right; } @Override protected double computePrefHeight(double width) { final double top = control.snappedTopInset(); final double bottom = control.snappedBottomInset(); final double iLeft = indicator.snappedLeftInset(); final double iRight = indicator.snappedRightInset(); final double iTop = indicator.snappedTopInset(); final double iBottom = indicator.snappedBottomInset(); final double indicatorMax = snapSize(Math.max(Math.max(iLeft, iRight), Math.max(iTop, iBottom))); final double pLeft = progress.snappedLeftInset(); final double pRight = progress.snappedRightInset(); final double pTop = progress.snappedTopInset(); final double pBottom = progress.snappedBottomInset(); final double progressMax = snapSize(Math.max(Math.max(pLeft, pRight), Math.max(pTop, pBottom))); final double tTop = tick.snappedTopInset(); final double tBottom = tick.snappedBottomInset(); final double indicatorHeight = indicatorMax + progressMax + tTop + tBottom + progressMax + indicatorMax; return top + indicatorHeight + textGap + doneTextHeight + bottom; } @Override protected double computeMaxWidth(double height) { return computePrefWidth(height); } @Override protected double computeMaxHeight(double width) { return computePrefHeight(width); } } private final class IndeterminateSpinner extends Region { private IndicatorPaths pathsG; private final List<Double> opacities = new ArrayList<>(); private boolean spinEnabled = false; private Paint fillOverride = null; private IndeterminateSpinner(boolean spinEnabled, Paint fillOverride) { this.spinEnabled = spinEnabled; this.fillOverride = fillOverride; setNodeOrientation(NodeOrientation.LEFT_TO_RIGHT); getStyleClass().setAll("spinner"); pathsG = new IndicatorPaths(); getChildren().add(pathsG); rebuild(); rebuildTimeline(); } public void setFillOverride(Paint fillOverride) { this.fillOverride = fillOverride; rebuild(); } public void setSpinEnabled(boolean spinEnabled) { this.spinEnabled = spinEnabled; rebuildTimeline(); } private void rebuildTimeline() { if (spinEnabled) { if (indeterminateTransition == null) { indeterminateTransition = new Timeline(); indeterminateTransition.setCycleCount(Timeline.INDEFINITE); indeterminateTransition.setDelay(UNCLIPPED_DELAY); } else { indeterminateTransition.stop(); ((Timeline)indeterminateTransition).getKeyFrames().clear(); } final ObservableList<KeyFrame> keyFrames = FXCollections.<KeyFrame>observableArrayList(); keyFrames.add(new KeyFrame(Duration.millis(1), new KeyValue(pathsG.rotateProperty(), 360))); keyFrames.add(new KeyFrame(Duration.millis(3900), new KeyValue(pathsG.rotateProperty(), 0))); for (int i = 100; i <= 3900; i += 100) { keyFrames.add(new KeyFrame(Duration.millis(i), event -> shiftColors())); } ((Timeline)indeterminateTransition).getKeyFrames().setAll(keyFrames); indeterminateTransition.playFromStart(); } else { if (indeterminateTransition != null) { indeterminateTransition.stop(); ((Timeline)indeterminateTransition).getKeyFrames().clear(); indeterminateTransition = null; } } } private class IndicatorPaths extends Pane { @Override protected double computePrefWidth(double height) { double w = 0; for(Node child: getChildren()) { if (child instanceof Region) { Region region = (Region)child; if (region.getShape() != null) { w = Math.max(w,region.getShape().getLayoutBounds().getMaxX()); } else { w = Math.max(w,region.prefWidth(height)); } } } return w; } @Override protected double computePrefHeight(double width) { double h = 0; for(Node child: getChildren()) { if (child instanceof Region) { Region region = (Region)child; if (region.getShape() != null) { h = Math.max(h,region.getShape().getLayoutBounds().getMaxY()); } else { h = Math.max(h,region.prefHeight(width)); } } } return h; } @Override protected void layoutChildren() { // calculate scale double scale = getWidth() / computePrefWidth(-1); for(Node child: getChildren()) { if (child instanceof Region) { Region region = (Region)child; if (region.getShape() != null) { region.resize( region.getShape().getLayoutBounds().getMaxX(), region.getShape().getLayoutBounds().getMaxY() ); region.getTransforms().setAll(new Scale(scale,scale,0,0)); } else { region.autosize(); } } } } } @Override protected void layoutChildren() { final double w = control.getWidth() - control.snappedLeftInset() - control.snappedRightInset(); final double h = control.getHeight() - control.snappedTopInset() - control.snappedBottomInset(); final double prefW = pathsG.prefWidth(-1); final double prefH = pathsG.prefHeight(-1); double scaleX = w / prefW; double scale = scaleX; if ((scaleX * prefH) > h) { scale = h / prefH; } double indicatorW = prefW * scale; double indicatorH = prefH * scale; pathsG.resizeRelocate((w - indicatorW) / 2, (h - indicatorH) / 2, indicatorW, indicatorH); } private void rebuild() { // update indeterminate indicator final int segments = indeterminateSegmentCount.get(); opacities.clear(); pathsG.getChildren().clear(); final double step = 0.8/(segments-1); for (int i = 0; i < segments; i++) { Region region = new Region(); region.setScaleShape(false); region.setCenterShape(false); region.getStyleClass().addAll("segment", "segment" + i); if (fillOverride instanceof Color) { Color c = (Color)fillOverride; region.setStyle("-fx-background-color: rgba("+((int)(255*c.getRed()))+","+((int)(255*c.getGreen()))+","+((int)(255*c.getBlue()))+","+c.getOpacity()+");"); } else { region.setStyle(null); } pathsG.getChildren().add(region); opacities.add(Math.max(0.1, (1.0 - (step*i)))); } } private void shiftColors() { if (opacities.size() <= 0) return; final int segments = indeterminateSegmentCount.get(); Collections.rotate(opacities, -1); for (int i = 0; i < segments; i++) { pathsG.getChildren().get(i).setOpacity(opacities.get(i)); } } } }