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/*
* Copyright (c) 2010, 2022, Oracle and/or its affiliates. All rights reserved.
* 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.
*
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package javafx.scene.chart;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import com.sun.javafx.scene.control.skin.Utils;
import javafx.animation.Animation;
import javafx.animation.KeyFrame;
import javafx.application.Platform;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.ObjectPropertyBase;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.property.StringPropertyBase;
import javafx.beans.value.WritableValue;
import javafx.collections.ObservableList;
import javafx.geometry.Pos;
import javafx.geometry.Side;
import javafx.scene.Node;
import javafx.scene.control.Label;
import javafx.scene.layout.Pane;
import javafx.scene.layout.Region;
import com.sun.javafx.charts.ChartLayoutAnimator;
import com.sun.javafx.charts.Legend;
import com.sun.javafx.scene.NodeHelper;
import javafx.css.StyleableBooleanProperty;
import javafx.css.StyleableObjectProperty;
import javafx.css.CssMetaData;
import javafx.css.converter.BooleanConverter;
import javafx.css.converter.EnumConverter;
import javafx.css.Styleable;
import javafx.css.StyleableProperty;
/**
* Base class for all charts. It has 3 parts the title, legend and chartContent. The chart content is populated by the
* specific subclass of Chart.
*
* @since JavaFX 2.0
*/
public abstract class Chart extends Region {
// -------------- PRIVATE FIELDS -----------------------------------------------------------------------------------
private static final int MIN_WIDTH_TO_LEAVE_FOR_CHART_CONTENT = 200;
private static final int MIN_HEIGHT_TO_LEAVE_FOR_CHART_CONTENT = 150;
/** Title Label */
private final Label titleLabel = new Label();
/**
* This is the Pane that Chart subclasses use to contain the chart content,
* It is sized to be inside the chart area leaving space for the title and legend.
*/
private final Pane chartContent = new Pane() {
@Override protected void layoutChildren() {
final double top = snappedTopInset();
final double left = snappedLeftInset();
final double bottom = snappedBottomInset();
final double right = snappedRightInset();
final double width = getWidth();
final double height = getHeight();
final double contentWidth = snapSizeX(width - (left + right));
final double contentHeight = snapSizeY(height - (top + bottom));
layoutChartChildren(snapPositionY(top), snapPositionX(left), contentWidth, contentHeight);
}
@Override public boolean usesMirroring() {
return useChartContentMirroring;
}
};
// Determines if chart content should be mirrored if node orientation is right-to-left.
boolean useChartContentMirroring = true;
/** Animator for animating stuff on the chart */
private final ChartLayoutAnimator animator = new ChartLayoutAnimator(chartContent);
// -------------- PUBLIC PROPERTIES --------------------------------------------------------------------------------
/** The chart title */
private StringProperty title = new StringPropertyBase() {
@Override protected void invalidated() {
titleLabel.setText(get());
}
@Override
public Object getBean() {
return Chart.this;
}
@Override
public String getName() {
return "title";
}
};
public final String getTitle() { return title.get(); }
public final void setTitle(String value) { title.set(value); }
public final StringProperty titleProperty() { return title; }
/**
* The side of the chart where the title is displayed
* @defaultValue Side.TOP
*/
private ObjectProperty titleSide = new StyleableObjectProperty(Side.TOP) {
@Override protected void invalidated() {
requestLayout();
}
@Override
public CssMetaData getCssMetaData() {
return StyleableProperties.TITLE_SIDE;
}
@Override
public Object getBean() {
return Chart.this;
}
@Override
public String getName() {
return "titleSide";
}
};
public final Side getTitleSide() { return titleSide.get(); }
public final void setTitleSide(Side value) { titleSide.set(value); }
public final ObjectProperty titleSideProperty() { return titleSide; }
/**
* The node to display as the Legend. Subclasses can set a node here to be displayed on a side as the legend. If
* no legend is wanted then this can be set to null
*/
private final ObjectProperty legend = new ObjectPropertyBase<>() {
private Node old = null;
@Override protected void invalidated() {
Node newLegend = get();
if (old != null) getChildren().remove(old);
if (newLegend != null) {
getChildren().add(newLegend);
newLegend.setVisible(isLegendVisible());
}
old = newLegend;
}
@Override
public Object getBean() {
return Chart.this;
}
@Override
public String getName() {
return "legend";
}
};
protected final Node getLegend() { return legend.getValue(); }
protected final void setLegend(Node value) { legend.setValue(value); }
protected final ObjectProperty legendProperty() { return legend; }
/**
* When true the chart will display a legend if the chart implementation supports a legend.
*/
private final BooleanProperty legendVisible = new StyleableBooleanProperty(true) {
@Override protected void invalidated() {
requestLayout();
}
@Override
public CssMetaData getCssMetaData() {
return StyleableProperties.LEGEND_VISIBLE;
}
@Override
public Object getBean() {
return Chart.this;
}
@Override
public String getName() {
return "legendVisible";
}
};
public final boolean isLegendVisible() { return legendVisible.getValue(); }
public final void setLegendVisible(boolean value) { legendVisible.setValue(value); }
public final BooleanProperty legendVisibleProperty() { return legendVisible; }
/**
* The side of the chart where the legend should be displayed
*
* @defaultValue Side.BOTTOM
*/
private ObjectProperty legendSide = new StyleableObjectProperty(Side.BOTTOM) {
@Override protected void invalidated() {
final Side legendSide = get();
final Node legend = getLegend();
if(legend instanceof Legend) ((Legend)legend).setVertical(Side.LEFT.equals(legendSide) || Side.RIGHT.equals(legendSide));
requestLayout();
}
@Override
public CssMetaData getCssMetaData() {
return StyleableProperties.LEGEND_SIDE;
}
@Override
public Object getBean() {
return Chart.this;
}
@Override
public String getName() {
return "legendSide";
}
};
public final Side getLegendSide() { return legendSide.get(); }
public final void setLegendSide(Side value) { legendSide.set(value); }
public final ObjectProperty legendSideProperty() { return legendSide; }
/** When true any data changes will be animated. */
private BooleanProperty animated = new SimpleBooleanProperty(this, "animated", true);
/**
* Indicates whether data changes will be animated or not.
*
* @return true if data changes will be animated and false otherwise.
*/
public final boolean getAnimated() { return animated.get(); }
public final void setAnimated(boolean value) { animated.set(value); }
public final BooleanProperty animatedProperty() { return animated; }
// -------------- PROTECTED PROPERTIES -----------------------------------------------------------------------------
/**
* Modifiable and observable list of all content in the chart. This is where implementations of Chart should add
* any nodes they use to draw their chart. This excludes the legend and title which are looked after by this class.
*
* @return Observable list of plot children
*/
protected ObservableList getChartChildren() {
return chartContent.getChildren();
}
// -------------- CONSTRUCTOR --------------------------------------------------------------------------------------
/**
* Creates a new default Chart instance.
*/
public Chart() {
titleLabel.setAlignment(Pos.CENTER);
titleLabel.focusTraversableProperty().bind(Platform.accessibilityActiveProperty());
getChildren().addAll(titleLabel, chartContent);
getStyleClass().add("chart");
titleLabel.getStyleClass().add("chart-title");
chartContent.getStyleClass().add("chart-content");
// mark chartContent as unmanaged because any changes to its preferred size shouldn't cause a relayout
chartContent.setManaged(false);
}
// -------------- METHODS ------------------------------------------------------------------------------------------
/**
* Play a animation involving the given keyframes. On every frame of the animation the chart will be relayed out
*
* @param keyFrames Array of KeyFrames to play
*/
void animate(KeyFrame...keyFrames) { animator.animate(keyFrames); }
/**
* Play the given animation on every frame of the animation the chart will be relayed out until the animation
* finishes. So to add a animation to a chart, create a animation on data model, during layoutChartContent() map
* data model to nodes then call this method with the animation.
*
* @param animation The animation to play
*/
protected void animate(Animation animation) { animator.animate(animation); }
/** Call this when you know something has changed that needs the chart to be relayed out. */
protected void requestChartLayout() {
chartContent.requestLayout();
}
/**
* This is used to check if any given animation should run. It returns true if animation is enabled and the node
* is visible and in a scene.
* @return true if animation is enabled and the node is visible and in a scene
*/
protected final boolean shouldAnimate(){
return getAnimated() && NodeHelper.isTreeShowing(this);
}
/**
* Called to update and layout the chart children available from getChartChildren()
*
* @param top The top offset from the origin to account for any padding on the chart content
* @param left The left offset from the origin to account for any padding on the chart content
* @param width The width of the area to layout the chart within
* @param height The height of the area to layout the chart within
*/
protected abstract void layoutChartChildren(double top, double left, double width, double height);
/**
* Invoked during the layout pass to layout this chart and all its content.
*/
@Override protected void layoutChildren() {
double top = snappedTopInset();
double left = snappedLeftInset();
double bottom = snappedBottomInset();
double right = snappedRightInset();
final double width = getWidth();
final double height = getHeight();
// layout title
if (getTitle() != null) {
titleLabel.setVisible(true);
if (getTitleSide().equals(Side.TOP)) {
final double titleHeight = snapSizeY(titleLabel.prefHeight(width-left-right));
titleLabel.resizeRelocate(left,top,width-left-right,titleHeight);
top += titleHeight;
} else if (getTitleSide().equals(Side.BOTTOM)) {
final double titleHeight = snapSizeY(titleLabel.prefHeight(width-left-right));
titleLabel.resizeRelocate(left,height-bottom-titleHeight,width-left-right,titleHeight);
bottom += titleHeight;
} else if (getTitleSide().equals(Side.LEFT)) {
final double titleWidth = snapSizeX(titleLabel.prefWidth(height-top-bottom));
titleLabel.resizeRelocate(left,top,titleWidth,height-top-bottom);
left += titleWidth;
} else if (getTitleSide().equals(Side.RIGHT)) {
final double titleWidth = snapSizeX(titleLabel.prefWidth(height-top-bottom));
titleLabel.resizeRelocate(width-right-titleWidth,top,titleWidth,height-top-bottom);
right += titleWidth;
}
} else {
titleLabel.setVisible(false);
}
// layout legend
final Node legend = getLegend();
if (legend != null) {
boolean shouldShowLegend = isLegendVisible();
if (shouldShowLegend) {
if (getLegendSide() == Side.TOP) {
final double legendHeight = snapSizeY(legend.prefHeight(width-left-right));
final double legendWidth = Utils.boundedSize(snapSizeX(legend.prefWidth(legendHeight)), 0, width - left - right);
legend.resizeRelocate(left + (((width - left - right)-legendWidth)/2), top, legendWidth, legendHeight);
if ((height - bottom - top - legendHeight) < MIN_HEIGHT_TO_LEAVE_FOR_CHART_CONTENT) {
shouldShowLegend = false;
} else {
top += legendHeight;
}
} else if (getLegendSide() == Side.BOTTOM) {
final double legendHeight = snapSizeY(legend.prefHeight(width-left-right));
final double legendWidth = Utils.boundedSize(snapSizeX(legend.prefWidth(legendHeight)), 0, width - left - right);
legend.resizeRelocate(left + (((width - left - right)-legendWidth)/2), height-bottom-legendHeight, legendWidth, legendHeight);
if ((height - bottom - top - legendHeight) < MIN_HEIGHT_TO_LEAVE_FOR_CHART_CONTENT) {
shouldShowLegend = false;
} else {
bottom += legendHeight;
}
} else if (getLegendSide() == Side.LEFT) {
final double legendWidth = snapSizeX(legend.prefWidth(height-top-bottom));
final double legendHeight = Utils.boundedSize(snapSizeY(legend.prefHeight(legendWidth)), 0, height - top - bottom);
legend.resizeRelocate(left,top +(((height-top-bottom)-legendHeight)/2),legendWidth,legendHeight);
if ((width - left - right - legendWidth) < MIN_WIDTH_TO_LEAVE_FOR_CHART_CONTENT) {
shouldShowLegend = false;
} else {
left += legendWidth;
}
} else if (getLegendSide() == Side.RIGHT) {
final double legendWidth = snapSizeX(legend.prefWidth(height-top-bottom));
final double legendHeight = Utils.boundedSize(snapSizeY(legend.prefHeight(legendWidth)), 0, height - top - bottom);
legend.resizeRelocate(width-right-legendWidth,top +(((height-top-bottom)-legendHeight)/2),legendWidth,legendHeight);
if ((width - left - right - legendWidth) < MIN_WIDTH_TO_LEAVE_FOR_CHART_CONTENT) {
shouldShowLegend = false;
} else {
right += legendWidth;
}
}
}
legend.setVisible(shouldShowLegend);
}
// whats left is for the chart content
chartContent.resizeRelocate(left,top,width-left-right,height-top-bottom);
}
/**
* Charts are sized outside in, user tells chart how much space it has and chart draws inside that. So minimum
* height is a constant 150.
*/
@Override protected double computeMinHeight(double width) { return 150; }
/**
* Charts are sized outside in, user tells chart how much space it has and chart draws inside that. So minimum
* width is a constant 200.
*/
@Override protected double computeMinWidth(double height) { return 200; }
/**
* Charts are sized outside in, user tells chart how much space it has and chart draws inside that. So preferred
* width is a constant 500.
*/
@Override protected double computePrefWidth(double height) { return 500.0; }
/**
* Charts are sized outside in, user tells chart how much space it has and chart draws inside that. So preferred
* height is a constant 400.
*/
@Override protected double computePrefHeight(double width) { return 400.0; }
// -------------- STYLESHEET HANDLING ------------------------------------------------------------------------------
private static class StyleableProperties {
private static final CssMetaData TITLE_SIDE =
new CssMetaData<>("-fx-title-side",
new EnumConverter<>(Side.class),
Side.TOP) {
@Override
public boolean isSettable(Chart node) {
return node.titleSide == null || !node.titleSide.isBound();
}
@Override
public StyleableProperty getStyleableProperty(Chart node) {
return (StyleableProperty)(WritableValue)node.titleSideProperty();
}
};
private static final CssMetaData LEGEND_SIDE =
new CssMetaData<>("-fx-legend-side",
new EnumConverter<>(Side.class),
Side.BOTTOM) {
@Override
public boolean isSettable(Chart node) {
return node.legendSide == null || !node.legendSide.isBound();
}
@Override
public StyleableProperty getStyleableProperty(Chart node) {
return (StyleableProperty)(WritableValue)node.legendSideProperty();
}
};
private static final CssMetaData LEGEND_VISIBLE =
new CssMetaData<>("-fx-legend-visible",
BooleanConverter.getInstance(), Boolean.TRUE) {
@Override
public boolean isSettable(Chart node) {
return node.legendVisible == null || !node.legendVisible.isBound();
}
@Override
public StyleableProperty getStyleableProperty(Chart node) {
return (StyleableProperty)node.legendVisibleProperty();
}
};
private static final List> STYLEABLES;
static {
final List> styleables =
new ArrayList<>(Region.getClassCssMetaData());
styleables.add(TITLE_SIDE);
styleables.add(LEGEND_VISIBLE);
styleables.add(LEGEND_SIDE);
STYLEABLES = Collections.unmodifiableList(styleables);
}
}
/**
* Gets the {@code CssMetaData} associated with this class, which may include the
* {@code CssMetaData} of its superclasses.
* @return the {@code CssMetaData}
* @since JavaFX 8.0
*/
public static List> getClassCssMetaData() {
return StyleableProperties.STYLEABLES;
}
/**
* {@inheritDoc}
* @since JavaFX 8.0
*/
@Override
public List> getCssMetaData() {
return getClassCssMetaData();
}
}
