com.sun.javafx.scene.control.inputmap.InputMap Maven / Gradle / Ivy
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*
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* 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).
*
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*
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package com.sun.javafx.scene.control.inputmap;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.ReadOnlyObjectProperty;
import javafx.beans.property.ReadOnlyObjectWrapper;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.collections.FXCollections;
import javafx.collections.ListChangeListener;
import javafx.collections.ObservableList;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.event.EventType;
import javafx.scene.Node;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.input.MouseEvent;
import javafx.util.Pair;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import java.util.function.Predicate;
import java.util.stream.Collectors;
/**
* InputMap is a class that is set on a given {@link Node}. When the Node receives
* an input event from the system, it passes this event in to the InputMap where
* the InputMap can check all installed
* {@link InputMap.Mapping mappings} to see if there is any
* suitable mapping, and if so, fire the provided {@link EventHandler}.
*
* @param The type of the Node that the InputMap is installed in.
* @since 9
*/
public class InputMap implements EventHandler {
/***************************************************************************
* *
* Private fields *
* *
**************************************************************************/
private final N node;
private final ObservableList> childInputMaps;
private final ObservableList> mappings;
// private final ObservableList> interceptors;
private final Map, List>> installedEventHandlers;
private final Map> eventTypeMappings;
/***************************************************************************
* *
* Constructors *
* *
**************************************************************************/
/**
* Creates the new InputMap instance which is related specifically to the
* given Node.
* @param node The Node for which this InputMap is attached.
*/
public InputMap(N node) {
if (node == null) {
throw new IllegalArgumentException("Node can not be null");
}
this.node = node;
this.eventTypeMappings = new HashMap<>();
this.installedEventHandlers = new HashMap<>();
// this.interceptors = FXCollections.observableArrayList();
// listeners
this.mappings = FXCollections.observableArrayList();
mappings.addListener((ListChangeListener>) c -> {
while (c.next()) {
// TODO handle mapping removal
if (c.wasRemoved()) {
for (Mapping mapping : c.getRemoved()) {
removeMapping(mapping);
}
}
if (c.wasAdded()) {
List> toRemove = new ArrayList<>();
for (Mapping mapping : c.getAddedSubList()) {
if (mapping == null) {
toRemove.add(null);
} else {
addMapping(mapping);
}
}
if (!toRemove.isEmpty()) {
getMappings().removeAll(toRemove);
throw new IllegalArgumentException("Null mappings not permitted");
}
}
}
});
childInputMaps = FXCollections.observableArrayList();
childInputMaps.addListener((ListChangeListener>) c -> {
while (c.next()) {
if (c.wasRemoved()) {
for (InputMap map : c.getRemoved()) {
map.setParentInputMap(null);
}
}
if (c.wasAdded()) {
List> toRemove = new ArrayList<>();
for (InputMap map : c.getAddedSubList()) {
// we check that the child input map maps to the same node
// as this input map
if (map.getNode() != getNode()) {
toRemove.add(map);
} else {
map.setParentInputMap(this);
}
}
if (!toRemove.isEmpty()) {
getChildInputMaps().removeAll(toRemove);
throw new IllegalArgumentException("Child InputMap intances need to share a common Node object");
}
}
}
});
}
/***************************************************************************
* *
* Properties *
* *
**************************************************************************/
// --- parent behavior - for now this is an private property
private ReadOnlyObjectWrapper> parentInputMap = new ReadOnlyObjectWrapper<>(this, "parentInputMap") {
@Override protected void invalidated() {
// whenever the parent InputMap changes, we uninstall all mappings and
// then reprocess them so that they are installed in the correct root.
reprocessAllMappings();
}
};
private final void setParentInputMap(InputMap value) { parentInputMap.set(value); }
private final InputMap getParentInputMap() {return parentInputMap.get(); }
private final ReadOnlyObjectProperty> parentInputMapProperty() { return parentInputMap.getReadOnlyProperty(); }
// --- interceptor
/**
* The role of the interceptor is to block the InputMap on which it is
* set from executing any mappings (contained within itself, or within a
* {@link #getChildInputMaps() child InputMap}, whenever the interceptor
* returns true. The interceptor is called every time an input event is received,
* and is allowed to reason on the given input event
* before returning a boolean value, where boolean true means block
* execution, and boolean false means to allow execution.
*/
private ObjectProperty> interceptor = new SimpleObjectProperty<>(this, "interceptor");
public final Predicate getInterceptor() {
return interceptor.get();
}
public final void setInterceptor(Predicate value) {
interceptor.set(value);
}
public final ObjectProperty> interceptorProperty() {
return interceptor;
}
/***************************************************************************
* *
* Public API *
* *
**************************************************************************/
/**
* The Node for which this InputMap is attached.
*/
public final N getNode() {
return node;
}
/**
* A mutable list of input mappings. Each will be considered whenever an
* input event is being looked up, and one of which may be used to handle
* the input event, based on the specifificity returned by each mapping
* (that is, the mapping with the highest specificity wins).
*/
public ObservableList> getMappings() {
return mappings;
}
/**
* A mutable list of child InputMaps. An InputMap may have child input maps,
* as this allows for easy addition
* of mappings that are state-specific. For example, if a Node can be in two
* different states, and the input mappings are different for each, then it
* makes sense to have one root (and empty) InputMap, with two children
* input maps, where each is populated with the specific input mappings for
* one of the two states. To prevent the wrong input map from being considered,
* it is simply a matter of setting an appropriate
* {@link #interceptorProperty() interceptor} on each map, so that they are only
* considered in one of the two states.
*/
public ObservableList> getChildInputMaps() {
return childInputMaps;
}
/**
* Disposes all child InputMaps, removes all event handlers from the Node,
* and clears the mappings list.
*/
public void dispose() {
for (InputMap childInputMap : getChildInputMaps()) {
childInputMap.dispose();
}
// uninstall event handlers
removeAllEventHandlers();
// clear out all mappings
getMappings().clear();
}
/** {@inheritDoc} */
@Override public void handle(Event e) {
if (e == null || e.isConsumed()) return;
List> mappings = lookup(e, true);
for (Mapping mapping : mappings) {
EventHandler eventHandler = mapping.getEventHandler();
if (eventHandler != null) {
eventHandler.handle(e);
}
if (mapping.isAutoConsume()) {
e.consume();
}
if (e.isConsumed()) {
break;
}
// If we are here, the event has not been consumed, so we continue
// looping through our list of matches. Refer to the documentation in
// lookup(Event) for more details on the list ordering.
}
}
/**
* Looks up the most specific mapping given the input, ignoring all
* interceptors. The valid values that can be passed into this method is
* based on the values returned by the {@link Mapping#getMappingKey()}
* method. Based on the subclasses of Mapping that ship with JavaFX, the
* valid values are therefore:
*
*
* - KeyMapping: A valid {@link KeyBinding}.
* - MouseMapping: A valid {@link MouseEvent} event
* type (e.g. {@code MouseEvent.MOUSE_PRESSED}).
*
*
* For other Mapping subclasses, refer to their javadoc, and specifically
* what is returned by {@link Mapping#getMappingKey()},
*
* @param mappingKey
* @return
*/
// TODO return all mappings, or just the first one?
public Optional> lookupMapping(Object mappingKey) {
if (mappingKey == null) {
return Optional.empty();
}
List> mappings = lookupMappingKey(mappingKey);
// descend into our child input maps as well
for (int i = 0; i < getChildInputMaps().size(); i++) {
InputMap childInputMap = getChildInputMaps().get(i);
List> childMappings = childInputMap.lookupMappingKey(mappingKey);
mappings.addAll(0, childMappings);
}
return mappings.size() > 0 ? Optional.of(mappings.get(0)) : Optional.empty();
}
/***************************************************************************
* *
* Private implementation *
* *
**************************************************************************/
private List> lookupMappingKey(Object mappingKey) {
return getMappings().stream()
.filter(mapping -> !mapping.isDisabled())
.filter(mapping -> mappingKey.equals(mapping.getMappingKey()))
.collect(Collectors.toList());
}
/*
* Returns a List of Mapping instances, in priority order (from highest priority
* to lowest priority). All mappings in the list have the same value specificity,
* so are ranked based on the input map (with the leaf input maps taking
* precedence over parent / root input maps).
*/
private List> lookup(Event event, boolean testInterceptors) {
// firstly we look at ourselves to see if we have a mapping, assuming our
// interceptors are valid
if (testInterceptors) {
boolean interceptorsApplies = testInterceptor(event, getInterceptor());
if (interceptorsApplies) {
return Collections.emptyList();
}
}
List> mappings = new ArrayList<>();
int minSpecificity = 0;
List>> results = lookupMappingAndSpecificity(event, minSpecificity);
if (! results.isEmpty()) {
minSpecificity = results.get(0).getKey();
mappings.addAll(results.stream().map(pair -> pair.getValue()).collect(Collectors.toList()));
}
// but we always descend into our child input maps as well, to see if there
// is a more specific mapping there. If there is a mapping of equal
// specificity, we take the child mapping over the parent mapping.
for (int i = 0; i < getChildInputMaps().size(); i++) {
InputMap childInputMap = getChildInputMaps().get(i);
minSpecificity = scanRecursively(childInputMap, event, testInterceptors, minSpecificity, mappings);
}
return mappings;
}
private int scanRecursively(InputMap inputMap, Event event, boolean testInterceptors, int minSpecificity, List> mappings) {
// test if the childInputMap should be considered
if (testInterceptors) {
boolean interceptorsApplies = testInterceptor(event, inputMap.getInterceptor());
if (interceptorsApplies) {
return minSpecificity;
}
}
// look at the given InputMap
List>> childResults = inputMap.lookupMappingAndSpecificity(event, minSpecificity);
if (!childResults.isEmpty()) {
int specificity = childResults.get(0).getKey();
List> childMappings = childResults.stream()
.map(pair -> pair.getValue())
.collect(Collectors.toList());
if (specificity == minSpecificity) {
mappings.addAll(0, childMappings);
} else if (specificity > minSpecificity) {
mappings.clear();
minSpecificity = specificity;
mappings.addAll(childMappings);
}
}
// now look at the children of this input map, if any exist
for (int i = 0; i < inputMap.getChildInputMaps().size(); i++) {
minSpecificity = scanRecursively(inputMap.getChildInputMaps().get(i), event, testInterceptors, minSpecificity, mappings);
}
return minSpecificity;
}
private InputMap getRootInputMap() {
InputMap rootInputMap = this;
while (true) {
if (rootInputMap == null) break;
InputMap parentInputMap = rootInputMap.getParentInputMap();
if (parentInputMap == null) break;
rootInputMap = parentInputMap;
}
return rootInputMap;
}
private void addMapping(Mapping mapping) {
InputMap rootInputMap = getRootInputMap();
// we want to track the event handlers we install, so that we can clean
// up in the dispose() method (and also so that we don't duplicate
// event handlers for a single event type). Because this is all handled
// in the root InputMap, we firstly find it, and then we defer to it.
rootInputMap.addEventHandler(mapping.eventType);
// we maintain a separate map of all mappings, which maps from the
// mapping event type into a list of mappings. This allows for easier
// iteration in the lookup methods.
EventType et = mapping.getEventType();
List _eventTypeMappings = this.eventTypeMappings.computeIfAbsent(et, f -> new ArrayList<>());
_eventTypeMappings.add(mapping);
}
private void removeMapping(Mapping mapping) {
EventType et = mapping.getEventType();
if (this.eventTypeMappings.containsKey(et)) {
List _eventTypeMappings = this.eventTypeMappings.get(et);
_eventTypeMappings.remove(mapping);
// TODO remove the event handler in the root if there are no more mappings of this type
// anywhere in the input map tree
}
}
private void addEventHandler(EventType et) {
List> eventHandlers =
installedEventHandlers.computeIfAbsent(et, f -> new ArrayList<>());
final EventHandler eventHandler = this::handle;
if (eventHandlers.isEmpty()) {
// System.out.println("Added event handler for type " + et);
node.addEventHandler(et, eventHandler);
}
// We need to store these event handlers so we can dispose cleanly.
eventHandlers.add(eventHandler);
}
private void removeAllEventHandlers() {
for (EventType et : installedEventHandlers.keySet()) {
List> handlers = installedEventHandlers.get(et);
for (EventHandler handler : handlers) {
// System.out.println("Removed event handler for type " + et);
node.removeEventHandler(et, handler);
}
}
}
private void reprocessAllMappings() {
removeAllEventHandlers();
this.mappings.stream().forEach(this::addMapping);
// now do the same for all children
for (InputMap child : getChildInputMaps()) {
child.reprocessAllMappings();
}
}
private List>> lookupMappingAndSpecificity(final Event event, final int minSpecificity) {
int _minSpecificity = minSpecificity;
List mappings = this.eventTypeMappings.getOrDefault(event.getEventType(), Collections.emptyList());
List>> result = new ArrayList<>();
for (Mapping mapping : mappings) {
if (mapping.isDisabled()) continue;
// test if mapping has an interceptor that will block this event.
// Interceptors return true if the interception should occur.
boolean interceptorsApplies = testInterceptor(event, mapping.getInterceptor());
if (interceptorsApplies) {
continue;
}
int specificity = mapping.getSpecificity(event);
if (specificity > 0 && specificity == _minSpecificity) {
result.add(new Pair<>(specificity, mapping));
} else if (specificity > _minSpecificity) {
result.clear();
result.add(new Pair<>(specificity, mapping));
_minSpecificity = specificity;
}
}
return result;
}
// Interceptors return true if the interception should occur.
private boolean testInterceptor(Event e, Predicate interceptor) {
return interceptor != null && interceptor.test(e);
}
/***************************************************************************
* *
* Support classes *
* *
**************************************************************************/
/**
* Abstract base class for all input mappings as used by the
* {@link InputMap} class.
*
* @param The type of {@link Event} the mapping represents.
*/
public static abstract class Mapping {
/***********************************************************************
* *
* Private fields *
* *
**********************************************************************/
private final EventType eventType;
private final EventHandler eventHandler;
/***********************************************************************
* *
* Constructors *
* *
**********************************************************************/
/**
* Creates a new Mapping instance.
*
* @param eventType The {@link EventType} that is being listened for.
* @param eventHandler The {@link EventHandler} to fire when the mapping
* is selected as the most-specific mapping.
*/
public Mapping(final EventType eventType, final EventHandler eventHandler) {
this.eventType = eventType;
this.eventHandler = eventHandler;
}
/***********************************************************************
* *
* Abstract methods *
* *
**********************************************************************/
/**
* This method must be implemented by all mapping implementations such
* that it returns an integer value representing how closely the mapping
* matches the given {@link Event}. The higher the number, the greater
* the match. This allows the InputMap to determine
* which mapping is most specific, and to therefore fire the appropriate
* mapping {@link Mapping#getEventHandler() EventHandler}.
*
* @param event The {@link Event} that needs to be assessed for its
* specificity.
* @return An integer indicating how close of a match the mapping is to
* the given Event. The higher the number, the greater the match.
*/
public abstract int getSpecificity(Event event);
/***********************************************************************
* *
* Properties *
* *
**********************************************************************/
// --- disabled
/**
* By default all mappings are enabled (so this disabled property is set
* to false by default). In some cases it is useful to be able to disable
* a mapping until it is applicable. In these cases, users may simply
* toggle the disabled property until desired.
*
* When the disabled property is true, the mapping will not be
* considered when input events are received, even if it is the most
* specific mapping available.
*/
private BooleanProperty disabled = new SimpleBooleanProperty(this, "disabled", false);
public final void setDisabled(boolean value) { disabled.set(value); }
public final boolean isDisabled() {return disabled.get(); }
public final BooleanProperty disabledProperty() { return disabled; }
// --- auto consume
/**
* By default mappings are set to 'auto consume' their specified event
* handler. This means that the event handler will not propagate further,
* but in some cases this is not desirable - sometimes it is preferred
* that the event continue to 'bubble up' to parent nodes so that they
* may also benefit from receiving this event. In these cases, it is
* important that this autoConsume property be changed from the default
* boolean true to instead be boolean false.
*/
private BooleanProperty autoConsume = new SimpleBooleanProperty(this, "autoConsume", true);
public final void setAutoConsume(boolean value) { autoConsume.set(value); }
public final boolean isAutoConsume() {return autoConsume.get(); }
public final BooleanProperty autoConsumeProperty() { return autoConsume; }
/***********************************************************************
* *
* Public API *
* *
**********************************************************************/
/**
* The {@link EventType} that is being listened for.
*/
public final EventType getEventType() {
return eventType;
}
/**
* The {@link EventHandler} that will be fired should this mapping be
* the most-specific mapping for a given input, and should it not be
* blocked by an interceptor (either at a
* {@link InputMap#interceptorProperty() input map} level or a
* {@link Mapping#interceptorProperty() mapping} level).
*/
public final EventHandler getEventHandler() {
return eventHandler;
}
// --- interceptor
/**
* The role of the interceptor is to block the mapping on which it is
* set from executing, whenever the interceptor returns true. The
* interceptor is called every time the mapping is the best match for
* a given input event, and is allowed to reason on the given input event
* before returning a boolean value, where boolean true means block
* execution, and boolean false means to allow execution.
*/
private ObjectProperty> interceptor = new SimpleObjectProperty<>(this, "interceptor");
public final Predicate getInterceptor() {
return interceptor.get();
}
public final void setInterceptor(Predicate value) {
interceptor.set(value);
}
public final ObjectProperty> interceptorProperty() {
return interceptor;
}
/**
*
* @return
*/
public Object getMappingKey() {
return eventType;
}
/** {@inheritDoc} */
@Override public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof Mapping)) return false;
Mapping that = (Mapping) o;
if (eventType != null ? !eventType.equals(that.getEventType()) : that.getEventType() != null) return false;
return true;
}
/** {@inheritDoc} */
@Override public int hashCode() {
return eventType != null ? eventType.hashCode() : 0;
}
}
/**
* The KeyMapping class provides API to specify
* {@link InputMap.Mapping mappings} related to key input.
*/
public static class KeyMapping extends Mapping {
/***********************************************************************
* *
* Private fields *
* *
**********************************************************************/
private final KeyBinding keyBinding;
/***********************************************************************
* *
* Constructors *
* *
**********************************************************************/
/**
* Creates a new KeyMapping instance that will fire when the given
* {@link KeyCode} is entered into the application by the user, and this
* will result in the given {@link EventHandler} being fired.
*
* @param keyCode The {@link KeyCode} to listen for.
* @param eventHandler The {@link EventHandler} to fire when the
* {@link KeyCode} is observed.
*/
public KeyMapping(final KeyCode keyCode, final EventHandler eventHandler) {
this(new KeyBinding(keyCode), eventHandler);
}
/**
* Creates a new KeyMapping instance that will fire when the given
* {@link KeyCode} is entered into the application by the user, and this
* will result in the given {@link EventHandler} being fired. The
* eventType argument can be one of the following:
*
*
* - {@link KeyEvent#ANY}
* - {@link KeyEvent#KEY_PRESSED}
* - {@link KeyEvent#KEY_TYPED}
* - {@link KeyEvent#KEY_RELEASED}
*
*
* @param keyCode The {@link KeyCode} to listen for.
* @param eventType The type of {@link KeyEvent} to listen for.
* @param eventHandler The {@link EventHandler} to fire when the
* {@link KeyCode} is observed.
*/
public KeyMapping(final KeyCode keyCode, final EventType eventType, final EventHandler eventHandler) {
this(new KeyBinding(keyCode, eventType), eventHandler);
}
/**
* Creates a new KeyMapping instance that will fire when the given
* {@link KeyBinding} is entered into the application by the user, and this
* will result in the given {@link EventHandler} being fired.
*
* @param keyBinding The {@link KeyBinding} to listen for.
* @param eventHandler The {@link EventHandler} to fire when the
* {@link KeyBinding} is observed.
*/
public KeyMapping(KeyBinding keyBinding, final EventHandler eventHandler) {
this(keyBinding, eventHandler, null);
}
/**
* Creates a new KeyMapping instance that will fire when the given
* {@link KeyBinding} is entered into the application by the user, and this
* will result in the given {@link EventHandler} being fired, as long as the
* given interceptor is not true.
*
* @param keyBinding The {@link KeyBinding} to listen for.
* @param eventHandler The {@link EventHandler} to fire when the
* {@link KeyBinding} is observed.
* @param interceptor A {@link Predicate} that, if true, will prevent the
* {@link EventHandler} from being fired.
*/
public KeyMapping(KeyBinding keyBinding, final EventHandler eventHandler, Predicate interceptor) {
super(keyBinding == null ? null : keyBinding.getType(), eventHandler);
if (keyBinding == null) {
throw new IllegalArgumentException("KeyMapping keyBinding constructor argument can not be null");
}
this.keyBinding = keyBinding;
setInterceptor(interceptor);
}
/***********************************************************************
* *
* Public API *
* *
**********************************************************************/
/** {@inheritDoc} */
@Override public Object getMappingKey() {
return keyBinding;
}
/** {@inheritDoc} */
@Override public int getSpecificity(Event e) {
if (isDisabled()) return 0;
if (!(e instanceof KeyEvent)) return 0;
return keyBinding.getSpecificity((KeyEvent)e);
}
/** {@inheritDoc} */
@Override public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof KeyMapping)) return false;
if (!super.equals(o)) return false;
KeyMapping that = (KeyMapping) o;
// we know keyBinding is non-null here
return keyBinding.equals(that.keyBinding);
}
/** {@inheritDoc} */
@Override public int hashCode() {
return Objects.hash(keyBinding);
}
}
/**
* The MouseMapping class provides API to specify
* {@link InputMap.Mapping mappings} related to mouse input.
*/
public static class MouseMapping extends Mapping {
/***********************************************************************
* *
* Constructors *
* *
**********************************************************************/
/**
* Creates a new KeyMapping instance that will fire when the given
* {@link KeyCode} is entered into the application by the user, and this
* will result in the given {@link EventHandler} being fired. The
* eventType argument can be any of the {@link MouseEvent} event types,
* but typically it is one of the following:
*
*
* - {@link MouseEvent#ANY}
* - {@link MouseEvent#MOUSE_PRESSED}
* - {@link MouseEvent#MOUSE_CLICKED}
* - {@link MouseEvent#MOUSE_RELEASED}
*
*
* @param eventType The type of {@link MouseEvent} to listen for.
* @param eventHandler The {@link EventHandler} to fire when the
* {@link MouseEvent} is observed.
*/
public MouseMapping(final EventType eventType, final EventHandler eventHandler) {
super(eventType, eventHandler);
if (eventType == null) {
throw new IllegalArgumentException("MouseMapping eventType constructor argument can not be null");
}
}
/***********************************************************************
* *
* Public API *
* *
**********************************************************************/
/** {@inheritDoc} */
@Override public int getSpecificity(Event e) {
if (isDisabled()) return 0;
if (!(e instanceof MouseEvent)) return 0;
EventType et = getEventType();
// FIXME naive
int s = 0;
if (e.getEventType() == MouseEvent.MOUSE_CLICKED && et != MouseEvent.MOUSE_CLICKED) return 0; else s++;
if (e.getEventType() == MouseEvent.MOUSE_DRAGGED && et != MouseEvent.MOUSE_DRAGGED) return 0; else s++;
if (e.getEventType() == MouseEvent.MOUSE_ENTERED && et != MouseEvent.MOUSE_ENTERED) return 0; else s++;
if (e.getEventType() == MouseEvent.MOUSE_ENTERED_TARGET && et != MouseEvent.MOUSE_ENTERED_TARGET) return 0; else s++;
if (e.getEventType() == MouseEvent.MOUSE_EXITED && et != MouseEvent.MOUSE_EXITED) return 0; else s++;
if (e.getEventType() == MouseEvent.MOUSE_EXITED_TARGET && et != MouseEvent.MOUSE_EXITED_TARGET) return 0; else s++;
if (e.getEventType() == MouseEvent.MOUSE_MOVED && et != MouseEvent.MOUSE_MOVED) return 0; else s++;
if (e.getEventType() == MouseEvent.MOUSE_PRESSED && et != MouseEvent.MOUSE_PRESSED) return 0; else s++;
if (e.getEventType() == MouseEvent.MOUSE_RELEASED && et != MouseEvent.MOUSE_RELEASED) return 0; else s++;
// TODO handle further checks
return s;
}
}
/**
* Convenience class that can act as an keyboard input interceptor, either at a
* {@link InputMap#interceptorProperty() input map} level or a
* {@link Mapping#interceptorProperty() mapping} level.
*
* @see InputMap#interceptorProperty()
* @see Mapping#interceptorProperty()
*/
public static class KeyMappingInterceptor implements Predicate {
private final KeyBinding keyBinding;
/**
* Creates a new KeyMappingInterceptor, which will block execution of
* event handlers (either at a
* {@link InputMap#interceptorProperty() input map} level or a
* {@link Mapping#interceptorProperty() mapping} level), where the input
* received is equal to the given {@link KeyBinding}.
*
* @param keyBinding The {@link KeyBinding} for which mapping execution
* should be blocked.
*/
public KeyMappingInterceptor(KeyBinding keyBinding) {
this.keyBinding = keyBinding;
}
/** {@inheritDoc} */
@Override
public boolean test(Event event) {
if (!(event instanceof KeyEvent)) return false;
return KeyBinding.toKeyBinding((KeyEvent)event).equals(keyBinding);
}
}
/**
* Convenience class that can act as a mouse input interceptor, either at a
* {@link InputMap#interceptorProperty() input map} level or a
* {@link Mapping#interceptorProperty() mapping} level.
*
* @see InputMap#interceptorProperty()
* @see Mapping#interceptorProperty()
*/
public static class MouseMappingInterceptor implements Predicate {
private final EventType eventType;
/**
* Creates a new MouseMappingInterceptor, which will block execution of
* event handlers (either at a
* {@link InputMap#interceptorProperty() input map} level or a
* {@link Mapping#interceptorProperty() mapping} level), where the input
* received is equal to the given {@link EventType}.
*
* @param eventType The {@link EventType} for which mapping execution
* should be blocked (typically one of
* {@link MouseEvent#MOUSE_PRESSED},
* {@link MouseEvent#MOUSE_CLICKED}, or
* {@link MouseEvent#MOUSE_RELEASED}).
*/
public MouseMappingInterceptor(EventType eventType) {
this.eventType = eventType;
}
/** {@inheritDoc} */
@Override
public boolean test(Event event) {
if (!(event instanceof MouseEvent)) return false;
return event.getEventType() == this.eventType;
}
}
}
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