/*
* Copyright (c) 2010, 2015, 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.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package javafx.scene.control;
import com.sun.javafx.beans.IDProperty;
import com.sun.javafx.css.StyleManager;
import javafx.css.SimpleStyleableBooleanProperty;
import javafx.css.SimpleStyleableDoubleProperty;
import javafx.css.SimpleStyleableObjectProperty;
import javafx.css.StyleOrigin;
import javafx.css.StyleableObjectProperty;
import javafx.css.StyleableStringProperty;
import com.sun.javafx.css.converters.BooleanConverter;
import com.sun.javafx.css.converters.EnumConverter;
import com.sun.javafx.css.converters.SizeConverter;
import com.sun.javafx.css.converters.StringConverter;
import com.sun.javafx.scene.control.skin.TooltipSkin;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.beans.property.*;
import javafx.beans.value.WritableValue;
import javafx.css.CssMetaData;
import javafx.css.FontCssMetaData;
import javafx.css.Styleable;
import javafx.css.StyleableProperty;
import javafx.event.EventHandler;
import javafx.geometry.NodeOrientation;
import javafx.scene.AccessibleRole;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.input.MouseEvent;
import javafx.scene.text.Font;
import javafx.scene.text.TextAlignment;
import javafx.stage.Window;
import javafx.util.Duration;
/**
* Tooltips are common UI elements which are typically used for showing
* additional information about a Node in the scenegraph when the Node is
* hovered over by the mouse. Any Node can show a tooltip. In most cases a
* Tooltip is created and its {@link #textProperty() text} property is modified
* to show plain text to the user. However, a Tooltip is able to show within it
* an arbitrary scenegraph of nodes - this is done by creating the scenegraph
* and setting it inside the Tooltip {@link #graphicProperty() graphic}
* property.
*
* You use the following approach to set a Tooltip on any node:
*
*
* Rectangle rect = new Rectangle(0, 0, 100, 100);
* Tooltip t = new Tooltip("A Square");
* Tooltip.install(rect, t);
*
*
* This tooltip will then participate with the typical tooltip semantics (i.e.
* appearing on hover, etc). Note that the Tooltip does not have to be
* uninstalled: it will be garbage collected when it is not referenced by any
* Node. It is possible to manually uninstall the tooltip, however.
*
* A single tooltip can be installed on multiple target nodes or multiple
* controls.
*
*
Because most Tooltips are shown on UI controls, there is special API
* for all controls to make installing a Tooltip less verbose. The example below
* shows how to create a tooltip for a Button control:
*
*
* import javafx.scene.control.Tooltip;
* import javafx.scene.control.Button;
*
* Button button = new Button("Hover Over Me");
* button.setTooltip(new Tooltip("Tooltip for Button"));
*
* @since JavaFX 2.0
*/
@IDProperty("id")
public class Tooltip extends PopupControl {
private static String TOOLTIP_PROP_KEY = "javafx.scene.control.Tooltip";
// RT-31134 : the tooltip style includes a shadow around the tooltip with a
// width of 9 and height of 5. This causes mouse events to not reach the control
// underneath resulting in losing hover state on the control while the tooltip is showing.
// Displaying the tooltip at an offset indicated below resolves this issue.
// RT-37107: The y-offset was upped to 7 to ensure no overlaps when the tooltip
// is shown near the right edge of the screen.
private static int TOOLTIP_XOFFSET = 10;
private static int TOOLTIP_YOFFSET = 7;
private static TooltipBehavior BEHAVIOR = new TooltipBehavior(
new Duration(1000), new Duration(5000), new Duration(200), false);
/**
* Associates the given {@link Tooltip} with the given {@link Node}. The tooltip
* can then behave similar to when it is set on any {@link Control}. A single
* tooltip can be associated with multiple nodes.
* @see Tooltip
*/
public static void install(Node node, Tooltip t) {
BEHAVIOR.install(node, t);
}
/**
* Removes the association of the given {@link Tooltip} on the specified
* {@link Node}. Hence hovering on the node will no longer result in showing of the
* tooltip.
* @see Tooltip
*/
public static void uninstall(Node node, Tooltip t) {
BEHAVIOR.uninstall(node);
}
/***************************************************************************
* *
* Constructors *
* *
**************************************************************************/
/**
* Creates a tooltip with an empty string for its text.
*/
public Tooltip() {
this(null);
}
/**
* Creates a tooltip with the specified text.
*
* @param text A text string for the tooltip.
*/
public Tooltip(String text) {
super();
if (text != null) setText(text);
bridge = new CSSBridge();
getContent().setAll(bridge);
getStyleClass().setAll("tooltip");
}
/***************************************************************************
* *
* Properties *
* *
**************************************************************************/
/**
* The text to display in the tooltip. If the text is set to null, an empty
* string will be displayed, despite the value being null.
*/
public final StringProperty textProperty() { return text; }
public final void setText(String value) {
textProperty().setValue(value);
}
public final String getText() { return text.getValue() == null ? "" : text.getValue(); }
private final StringProperty text = new SimpleStringProperty(this, "text", "") {
@Override protected void invalidated() {
super.invalidated();
final String value = get();
if (isShowing() && value != null && !value.equals(getText())) {
//Dynamic tooltip content is location-dependant.
//Chromium trick.
setAnchorX(BEHAVIOR.lastMouseX);
setAnchorY(BEHAVIOR.lastMouseY);
}
}
};
/**
* Specifies the behavior for lines of text when text is multiline.
* Unlike {@link #contentDisplayProperty() contentDisplay} which affects the
* graphic and text, this setting only affects multiple lines of text
* relative to the text bounds.
*/
public final ObjectProperty textAlignmentProperty() {
return textAlignment;
}
public final void setTextAlignment(TextAlignment value) {
textAlignmentProperty().setValue(value);
}
public final TextAlignment getTextAlignment() {
return textAlignmentProperty().getValue();
}
private final ObjectProperty textAlignment =
new SimpleStyleableObjectProperty<>(TEXT_ALIGNMENT, this, "textAlignment", TextAlignment.LEFT);;
/**
* Specifies the behavior to use if the text of the {@code Tooltip}
* exceeds the available space for rendering the text.
*/
public final ObjectProperty textOverrunProperty() {
return textOverrun;
}
public final void setTextOverrun(OverrunStyle value) {
textOverrunProperty().setValue(value);
}
public final OverrunStyle getTextOverrun() {
return textOverrunProperty().getValue();
}
private final ObjectProperty textOverrun =
new SimpleStyleableObjectProperty(TEXT_OVERRUN, this, "textOverrun", OverrunStyle.ELLIPSIS);
/**
* If a run of text exceeds the width of the Tooltip, then this variable
* indicates whether the text should wrap onto another line.
*/
public final BooleanProperty wrapTextProperty() {
return wrapText;
}
public final void setWrapText(boolean value) {
wrapTextProperty().setValue(value);
}
public final boolean isWrapText() {
return wrapTextProperty().getValue();
}
private final BooleanProperty wrapText =
new SimpleStyleableBooleanProperty(WRAP_TEXT, this, "wrapText", false);
/**
* The default font to use for text in the Tooltip. If the Tooltip's text is
* rich text then this font may or may not be used depending on the font
* information embedded in the rich text, but in any case where a default
* font is required, this font will be used.
*/
public final ObjectProperty fontProperty() {
return font;
}
public final void setFont(Font value) {
fontProperty().setValue(value);
}
public final Font getFont() {
return fontProperty().getValue();
}
private final ObjectProperty font = new StyleableObjectProperty(Font.getDefault()) {
private boolean fontSetByCss = false;
@Override public void applyStyle(StyleOrigin newOrigin, Font value) {
// RT-20727 - if CSS is setting the font, then make sure invalidate doesn't call impl_reapplyCSS
try {
// super.applyStyle calls set which might throw if value is bound.
// Have to make sure fontSetByCss is reset.
fontSetByCss = true;
super.applyStyle(newOrigin, value);
} catch(Exception e) {
throw e;
} finally {
fontSetByCss = false;
}
}
@Override public void set(Font value) {
final Font oldValue = get();
if (value != null ? !value.equals(oldValue) : oldValue != null) {
super.set(value);
}
}
@Override protected void invalidated() {
// RT-20727 - if font is changed by calling setFont, then
// css might need to be reapplied since font size affects
// calculated values for styles with relative values
if(fontSetByCss == false) {
Tooltip.this.bridge.impl_reapplyCSS();
}
}
@Override public CssMetaData getCssMetaData() {
return FONT;
}
@Override public Object getBean() {
return Tooltip.this;
}
@Override public String getName() {
return "font";
}
};
/**
* An optional icon for the Tooltip. This can be positioned relative to the
* text by using the {@link #contentDisplayProperty() content display}
* property.
* The node specified for this variable cannot appear elsewhere in the
* scene graph, otherwise the {@code IllegalArgumentException} is thrown.
* See the class description of {@link javafx.scene.Node Node} for more detail.
*/
public final ObjectProperty graphicProperty() {
return graphic;
}
public final void setGraphic(Node value) {
graphicProperty().setValue(value);
}
public final Node getGraphic() {
return graphicProperty().getValue();
}
private final ObjectProperty graphic = new StyleableObjectProperty() {
// The graphic is styleable by css, but it is the
// imageUrlProperty that handles the style value.
@Override public CssMetaData getCssMetaData() {
return GRAPHIC;
}
@Override public Object getBean() {
return Tooltip.this;
}
@Override public String getName() {
return "graphic";
}
};
private StyleableStringProperty imageUrlProperty() {
if (imageUrl == null) {
imageUrl = new StyleableStringProperty() {
// If imageUrlProperty is invalidated, this is the origin of the style that
// triggered the invalidation. This is used in the invaildated() method where the
// value of super.getStyleOrigin() is not valid until after the call to set(v) returns,
// by which time invalidated will have been called.
// This value is initialized to USER in case someone calls set on the imageUrlProperty, which
// is possible:
// CssMetaData metaData = ((StyleableProperty)labeled.graphicProperty()).getCssMetaData();
// StyleableProperty prop = metaData.getStyleableProperty(labeled);
// prop.set(someUrl);
//
// TODO: Note that prop != labeled, which violates the contract between StyleableProperty and CssMetaData.
StyleOrigin origin = StyleOrigin.USER;
@Override public void applyStyle(StyleOrigin origin, String v) {
this.origin = origin;
// Don't want applyStyle to throw an exception which would leave this.origin set to the wrong value
if (graphic == null || graphic.isBound() == false) super.applyStyle(origin, v);
// Origin is only valid for this invocation of applyStyle, so reset it to USER in case someone calls set.
this.origin = StyleOrigin.USER;
}
@Override protected void invalidated() {
// need to call super.get() here since get() is overridden to return the graphicProperty's value
final String url = super.get();
if (url == null) {
((StyleableProperty)(WritableValue)graphicProperty()).applyStyle(origin, null);
} else {
// RT-34466 - if graphic's url is the same as this property's value, then don't overwrite.
final Node graphicNode = Tooltip.this.getGraphic();
if (graphicNode instanceof ImageView) {
final ImageView imageView = (ImageView)graphicNode;
final Image image = imageView.getImage();
if (image != null) {
final String imageViewUrl = image.impl_getUrl();
if (url.equals(imageViewUrl)) return;
}
}
final Image img = StyleManager.getInstance().getCachedImage(url);
if (img != null) {
// Note that it is tempting to try to re-use existing ImageView simply by setting
// the image on the current ImageView, if there is one. This would effectively change
// the image, but not the ImageView which means that no graphicProperty listeners would
// be notified. This is probably not what we want.
// Have to call applyStyle on graphicProperty so that the graphicProperty's
// origin matches the imageUrlProperty's origin.
((StyleableProperty)(WritableValue)graphicProperty()).applyStyle(origin, new ImageView(img));
}
}
}
@Override public String get() {
// The value of the imageUrlProperty is that of the graphicProperty.
// Return the value in a way that doesn't expand the graphicProperty.
final Node graphic = getGraphic();
if (graphic instanceof ImageView) {
final Image image = ((ImageView)graphic).getImage();
if (image != null) {
return image.impl_getUrl();
}
}
return null;
}
@Override public StyleOrigin getStyleOrigin() {
// The origin of the imageUrlProperty is that of the graphicProperty.
// Return the origin in a way that doesn't expand the graphicProperty.
return graphic != null ? ((StyleableProperty)(WritableValue)graphic).getStyleOrigin() : null;
}
@Override public Object getBean() {
return Tooltip.this;
}
@Override public String getName() {
return "imageUrl";
}
@Override public CssMetaData getCssMetaData() {
return GRAPHIC;
}
};
}
return imageUrl;
}
private StyleableStringProperty imageUrl = null;
/**
* Specifies the positioning of the graphic relative to the text.
*/
public final ObjectProperty contentDisplayProperty() {
return contentDisplay;
}
public final void setContentDisplay(ContentDisplay value) {
contentDisplayProperty().setValue(value);
}
public final ContentDisplay getContentDisplay() {
return contentDisplayProperty().getValue();
}
private final ObjectProperty contentDisplay =
new SimpleStyleableObjectProperty<>(CONTENT_DISPLAY, this, "contentDisplay", ContentDisplay.LEFT);
/**
* The amount of space between the graphic and text
*/
public final DoubleProperty graphicTextGapProperty() {
return graphicTextGap;
}
public final void setGraphicTextGap(double value) {
graphicTextGapProperty().setValue(value);
}
public final double getGraphicTextGap() {
return graphicTextGapProperty().getValue();
}
private final DoubleProperty graphicTextGap =
new SimpleStyleableDoubleProperty(GRAPHIC_TEXT_GAP, this, "graphicTextGap", 4d);
/**
* Typically, the tooltip is "activated" when the mouse moves over a Control.
* There is usually some delay between when the Tooltip becomes "activated"
* and when it is actually shown. The details (such as the amount of delay, etc)
* is left to the Skin implementation.
*/
private final ReadOnlyBooleanWrapper activated = new ReadOnlyBooleanWrapper(this, "activated");
final void setActivated(boolean value) { activated.set(value); }
public final boolean isActivated() { return activated.get(); }
public final ReadOnlyBooleanProperty activatedProperty() { return activated.getReadOnlyProperty(); }
/***************************************************************************
* *
* Methods *
* *
**************************************************************************/
/** {@inheritDoc} */
@Override protected Skin createDefaultSkin() {
return new TooltipSkin(this);
}
/***************************************************************************
* *
* Stylesheet Handling *
* *
**************************************************************************/
private static final CssMetaData FONT =
new FontCssMetaData("-fx-font", Font.getDefault()) {
@Override
public boolean isSettable(Tooltip.CSSBridge cssBridge) {
return !cssBridge.tooltip.fontProperty().isBound();
}
@Override
public StyleableProperty getStyleableProperty(Tooltip.CSSBridge cssBridge) {
return (StyleableProperty)(WritableValue)cssBridge.tooltip.fontProperty();
}
};
private static final CssMetaData TEXT_ALIGNMENT =
new CssMetaData("-fx-text-alignment",
new EnumConverter(TextAlignment.class),
TextAlignment.LEFT) {
@Override
public boolean isSettable(Tooltip.CSSBridge cssBridge) {
return !cssBridge.tooltip.textAlignmentProperty().isBound();
}
@Override
public StyleableProperty getStyleableProperty(Tooltip.CSSBridge cssBridge) {
return (StyleableProperty)(WritableValue)cssBridge.tooltip.textAlignmentProperty();
}
};
private static final CssMetaData TEXT_OVERRUN =
new CssMetaData("-fx-text-overrun",
new EnumConverter(OverrunStyle.class),
OverrunStyle.ELLIPSIS) {
@Override
public boolean isSettable(Tooltip.CSSBridge cssBridge) {
return !cssBridge.tooltip.textOverrunProperty().isBound();
}
@Override
public StyleableProperty getStyleableProperty(Tooltip.CSSBridge cssBridge) {
return (StyleableProperty)(WritableValue)cssBridge.tooltip.textOverrunProperty();
}
};
private static final CssMetaData WRAP_TEXT =
new CssMetaData("-fx-wrap-text",
BooleanConverter.getInstance(), Boolean.FALSE) {
@Override
public boolean isSettable(Tooltip.CSSBridge cssBridge) {
return !cssBridge.tooltip.wrapTextProperty().isBound();
}
@Override
public StyleableProperty getStyleableProperty(Tooltip.CSSBridge cssBridge) {
return (StyleableProperty)(WritableValue)cssBridge.tooltip.wrapTextProperty();
}
};
private static final CssMetaData GRAPHIC =
new CssMetaData("-fx-graphic",
StringConverter.getInstance()) {
@Override
public boolean isSettable(Tooltip.CSSBridge cssBridge) {
return !cssBridge.tooltip.graphicProperty().isBound();
}
@Override
public StyleableProperty getStyleableProperty(Tooltip.CSSBridge cssBridge) {
return (StyleableProperty)cssBridge.tooltip.imageUrlProperty();
}
};
private static final CssMetaData CONTENT_DISPLAY =
new CssMetaData("-fx-content-display",
new EnumConverter(ContentDisplay.class),
ContentDisplay.LEFT) {
@Override
public boolean isSettable(Tooltip.CSSBridge cssBridge) {
return !cssBridge.tooltip.contentDisplayProperty().isBound();
}
@Override
public StyleableProperty getStyleableProperty(Tooltip.CSSBridge cssBridge) {
return (StyleableProperty)(WritableValue)cssBridge.tooltip.contentDisplayProperty();
}
};
private static final CssMetaData GRAPHIC_TEXT_GAP =
new CssMetaData("-fx-graphic-text-gap",
SizeConverter.getInstance(), 4.0) {
@Override
public boolean isSettable(Tooltip.CSSBridge cssBridge) {
return !cssBridge.tooltip.graphicTextGapProperty().isBound();
}
@Override
public StyleableProperty getStyleableProperty(Tooltip.CSSBridge cssBridge) {
return (StyleableProperty)(WritableValue)cssBridge.tooltip.graphicTextGapProperty();
}
};
private static final List> STYLEABLES;
static {
final List> styleables =
new ArrayList>(PopupControl.getClassCssMetaData());
styleables.add(FONT);
styleables.add(TEXT_ALIGNMENT);
styleables.add(TEXT_OVERRUN);
styleables.add(WRAP_TEXT);
styleables.add(GRAPHIC);
styleables.add(CONTENT_DISPLAY);
styleables.add(GRAPHIC_TEXT_GAP);
STYLEABLES = Collections.unmodifiableList(styleables);
}
/**
* @return The CssMetaData associated with this class, which may include the
* CssMetaData of its super classes.
* @since JavaFX 8.0
*/
public static List> getClassCssMetaData() {
return STYLEABLES;
}
/**
* {@inheritDoc}
* @since JavaFX 8.0
*/
@Override
public List> getCssMetaData() {
return getClassCssMetaData();
}
@Override public Styleable getStyleableParent() {
if (BEHAVIOR.hoveredNode == null) {
return super.getStyleableParent();
}
return BEHAVIOR.hoveredNode;
}
/***************************************************************************
* *
* Support classes *
* *
**************************************************************************/
private final class CSSBridge extends PopupControl.CSSBridge {
private Tooltip tooltip = Tooltip.this;
CSSBridge() {
super();
setAccessibleRole(AccessibleRole.TOOLTIP);
}
}
private static class TooltipBehavior {
/*
* There are two key concepts with Tooltip: activated and visible. A Tooltip
* is activated as soon as a mouse move occurs over the target node. When it
* becomes activated, we start off the ACTIVATION_TIMER. If the
* ACTIVATION_TIMER expires before another mouse event occurs, then we will
* show the popup. This timer typically lasts about 1 second.
*
* Once visible, we reset the ACTIVATION_TIMER and start the HIDE_TIMER.
* This second timer will allow the tooltip to remain visible for some time
* period (such as 5 seconds). If the mouse hasn't moved, and the HIDE_TIMER
* expires, then the tooltip is hidden and the tooltip is no longer
* activated.
*
* If another mouse move occurs, the ACTIVATION_TIMER starts again, and the
* same rules apply as above.
*
* If a mouse exit event occurs while the HIDE_TIMER is ticking, we reset
* the HIDE_TIMER. Thus, the tooltip disappears after 5 seconds from the
* last mouse move.
*
* If some other mouse event occurs while the HIDE_TIMER is running, other
* than mouse move or mouse enter/exit (such as a click), then the tooltip
* is hidden, the HIDE_TIMER stopped, and activated set to false.
*
* If a mouse exit occurs while the HIDE_TIMER is running, we stop the
* HIDE_TIMER and start the LEFT_TIMER, and immediately hide the tooltip.
* This timer is very short, maybe about a 1/2 second. If the mouse enters a
* new node which also has a tooltip before LEFT_TIMER expires, then the
* second tooltip is activated and shown immediately (the ACTIVATION_TIMER
* having been bypassed), and the HIDE_TIMER is started. If the LEFT_TIMER
* expires and there is no mouse movement over a control with a tooltip,
* then we are back to the initial steady state where the next mouse move
* over a node with a tooltip installed will start the ACTIVATION_TIMER.
*/
private Timeline activationTimer = new Timeline();
private Timeline hideTimer = new Timeline();
private Timeline leftTimer = new Timeline();
/**
* The Node with a tooltip over which the mouse is hovering. There can
* only be one of these at a time.
*/
private Node hoveredNode;
/**
* The tooltip that is currently activated. There can only be one
* of these at a time.
*/
private Tooltip activatedTooltip;
/**
* The tooltip that is currently visible. There can only be one
* of these at a time.
*/
private Tooltip visibleTooltip;
/**
* The last position of the mouse, in screen coordinates.
*/
private double lastMouseX;
private double lastMouseY;
private boolean hideOnExit;
TooltipBehavior(Duration openDelay, Duration visibleDuration, Duration closeDelay, final boolean hideOnExit) {
this.hideOnExit = hideOnExit;
activationTimer.getKeyFrames().add(new KeyFrame(openDelay));
activationTimer.setOnFinished(event -> {
// Show the currently activated tooltip and start the
// HIDE_TIMER.
assert activatedTooltip != null;
final Window owner = getWindow(hoveredNode);
final boolean treeVisible = isWindowHierarchyVisible(hoveredNode);
// If the ACTIVATED tooltip is part of a visible window
// hierarchy, we can go ahead and show the tooltip and
// start the HIDE_TIMER.
//
// If the owner is null or invisible, then it either means a
// bug in our code, the node was removed from a scene or
// window or made invisible, or the node is not part of a
// visible window hierarchy. In that case, we don't show the
// tooltip, and we don't start the HIDE_TIMER. We simply let
// ACTIVATED_TIMER expire, and wait until the next mouse
// the movement to start it again.
if (owner != null && owner.isShowing() && treeVisible) {
double x = lastMouseX;
double y = lastMouseY;
// The tooltip always inherits the nodeOrientation of
// the Node that it is attached to (see RT-26147). It
// is possible to override this for the Tooltip content
// (but not the popup placement) by setting the
// nodeOrientation on tooltip.getScene().getRoot().
NodeOrientation nodeOrientation = hoveredNode.getEffectiveNodeOrientation();
activatedTooltip.getScene().setNodeOrientation(nodeOrientation);
if (nodeOrientation == NodeOrientation.RIGHT_TO_LEFT) {
x -= activatedTooltip.getWidth();
}
activatedTooltip.show(owner, x+TOOLTIP_XOFFSET, y+TOOLTIP_YOFFSET);
// RT-37107: Ensure the tooltip is displayed in a position
// where it will not be under the mouse, even when the tooltip
// is near the edge of the screen
if ((y+TOOLTIP_YOFFSET) > activatedTooltip.getAnchorY()) {
// the tooltip has been shifted vertically upwards,
// most likely to be underneath the mouse cursor, so we
// need to shift it further by hiding and reshowing
// in another location
activatedTooltip.hide();
y -= activatedTooltip.getHeight();
activatedTooltip.show(owner, x+TOOLTIP_XOFFSET, y);
}
visibleTooltip = activatedTooltip;
hoveredNode = null;
hideTimer.playFromStart();
}
// Once the activation timer has expired, the tooltip is no
// longer in the activated state, it is only in the visible
// state, so we go ahead and set activated to false
activatedTooltip.setActivated(false);
activatedTooltip = null;
});
hideTimer.getKeyFrames().add(new KeyFrame(visibleDuration));
hideTimer.setOnFinished(event -> {
// Hide the currently visible tooltip.
assert visibleTooltip != null;
visibleTooltip.hide();
visibleTooltip = null;
hoveredNode = null;
});
leftTimer.getKeyFrames().add(new KeyFrame(closeDelay));
leftTimer.setOnFinished(event -> {
if (!hideOnExit) {
// Hide the currently visible tooltip.
assert visibleTooltip != null;
visibleTooltip.hide();
visibleTooltip = null;
hoveredNode = null;
}
});
}
/**
* Registers for mouse move events only. When the mouse is moved, this
* handler will detect it and decide whether to start the ACTIVATION_TIMER
* (if the ACTIVATION_TIMER is not started), restart the ACTIVATION_TIMER
* (if ACTIVATION_TIMER is running), or skip the ACTIVATION_TIMER and just
* show the tooltip (if the LEFT_TIMER is running).
*/
private EventHandler MOVE_HANDLER = (MouseEvent event) -> {
//Screen coordinates need to be actual for dynamic tooltip.
//See Tooltip.setText
lastMouseX = event.getScreenX();
lastMouseY = event.getScreenY();
// If the HIDE_TIMER is running, then we don't want this event
// handler to do anything, or change any state at all.
if (hideTimer.getStatus() == Timeline.Status.RUNNING) {
return;
}
// Note that the "install" step will both register this handler
// with the target node and also associate the tooltip with the
// target node, by stashing it in the client properties of the node.
hoveredNode = (Node) event.getSource();
Tooltip t = (Tooltip) hoveredNode.getProperties().get(TOOLTIP_PROP_KEY);
if (t != null) {
// In theory we should never get here with an invisible or
// non-existant window hierarchy, but might in some cases where
// people are feeding fake mouse events into the hierarchy. So
// we'll guard against that case.
final Window owner = getWindow(hoveredNode);
final boolean treeVisible = isWindowHierarchyVisible(hoveredNode);
if (owner != null && treeVisible) {
// Now we know that the currently HOVERED node has a tooltip
// and that it is part of a visible window Hierarchy.
// If LEFT_TIMER is running, then we make this tooltip
// visible immediately, stop the LEFT_TIMER, and start the
// HIDE_TIMER.
if (leftTimer.getStatus() == Timeline.Status.RUNNING) {
if (visibleTooltip != null) visibleTooltip.hide();
visibleTooltip = t;
t.show(owner, event.getScreenX()+TOOLTIP_XOFFSET,
event.getScreenY()+TOOLTIP_YOFFSET);
leftTimer.stop();
hideTimer.playFromStart();
} else {
// Start / restart the timer and make sure the tooltip
// is marked as activated.
t.setActivated(true);
activatedTooltip = t;
activationTimer.stop();
activationTimer.playFromStart();
}
}
} else {
// TODO should deregister, no point being here anymore!
}
};
/**
* Registers for mouse exit events. If the ACTIVATION_TIMER is running then
* this will simply stop it. If the HIDE_TIMER is running then this will
* stop the HIDE_TIMER, hide the tooltip, and start the LEFT_TIMER.
*/
private EventHandler LEAVING_HANDLER = (MouseEvent event) -> {
// detect bogus mouse exit events, if it didn't really move then ignore it
if (activationTimer.getStatus() == Timeline.Status.RUNNING) {
activationTimer.stop();
} else if (hideTimer.getStatus() == Timeline.Status.RUNNING) {
assert visibleTooltip != null;
hideTimer.stop();
if (hideOnExit) visibleTooltip.hide();
leftTimer.playFromStart();
}
hoveredNode = null;
activatedTooltip = null;
if (hideOnExit) visibleTooltip = null;
};
/**
* Registers for mouse click, press, release, drag events. If any of these
* occur, then the tooltip is hidden (if it is visible), it is deactivated,
* and any and all timers are stopped.
*/
private EventHandler KILL_HANDLER = (MouseEvent event) -> {
activationTimer.stop();
hideTimer.stop();
leftTimer.stop();
if (visibleTooltip != null) visibleTooltip.hide();
hoveredNode = null;
activatedTooltip = null;
visibleTooltip = null;
};
private void install(Node node, Tooltip t) {
// Install the MOVE_HANDLER, LEAVING_HANDLER, and KILL_HANDLER on
// the given node. Stash the tooltip in the node's client properties
// map so that it is not gc'd. The handlers must all be installed
// with a TODO weak reference so as not to cause a memory leak
if (node == null) return;
node.addEventHandler(MouseEvent.MOUSE_MOVED, MOVE_HANDLER);
node.addEventHandler(MouseEvent.MOUSE_EXITED, LEAVING_HANDLER);
node.addEventHandler(MouseEvent.MOUSE_PRESSED, KILL_HANDLER);
node.getProperties().put(TOOLTIP_PROP_KEY, t);
}
private void uninstall(Node node) {
if (node == null) return;
node.removeEventHandler(MouseEvent.MOUSE_MOVED, MOVE_HANDLER);
node.removeEventHandler(MouseEvent.MOUSE_EXITED, LEAVING_HANDLER);
node.removeEventHandler(MouseEvent.MOUSE_PRESSED, KILL_HANDLER);
Tooltip t = (Tooltip)node.getProperties().get(TOOLTIP_PROP_KEY);
if (t != null) {
node.getProperties().remove(TOOLTIP_PROP_KEY);
if (t.equals(visibleTooltip) || t.equals(activatedTooltip)) {
KILL_HANDLER.handle(null);
}
}
}
/**
* Gets the top level window associated with this node.
* @param node the node
* @return the top level window
*/
private Window getWindow(final Node node) {
final Scene scene = node == null ? null : node.getScene();
return scene == null ? null : scene.getWindow();
}
/**
* Gets whether the entire window hierarchy is visible for this node.
* @param node the node to check
* @return true if entire hierarchy is visible
*/
private boolean isWindowHierarchyVisible(Node node) {
boolean treeVisible = node != null;
Parent parent = node == null ? null : node.getParent();
while (parent != null && treeVisible) {
treeVisible = parent.isVisible();
parent = parent.getParent();
}
return treeVisible;
}
}
}