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FlexDirectionDefaults.java
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FlexDirectionDefaults.java
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package org.genericsystem.reactor.contextproperties;
import java.util.function.Function;
import org.genericsystem.reactor.Context;
import org.genericsystem.reactor.Tag;
import org.genericsystem.reactor.gscomponents.FlexDirection;
import javafx.beans.property.Property;
import javafx.beans.property.SimpleObjectProperty;
import javafx.beans.value.ChangeListener;
public interface FlexDirectionDefaults extends ContextProperty {
public static final String FLEX_DIRECTION = "flexDirection";
public static final String PARENT_DIRECTION_LISTENER = "parentDirectionListener";
default Property<FlexDirection> getDirectionProperty(Context context) {
if (!context.containsAttribute((Tag) this, FLEX_DIRECTION)) {
Property<FlexDirection> direction = new SimpleObjectProperty<>();
direction.addListener((o, v, nv) -> addStyle(context, "flex-direction", nv != null ? nv.toString() : "column"));
direction.setValue(FlexDirection.COLUMN);
addContextAttribute(FLEX_DIRECTION, context, direction);
}
return getContextProperty(FLEX_DIRECTION, context);
}
default Property<ChangeListener<FlexDirection>> getDirectionListenerProperty(Context context) {
return getContextProperty(PARENT_DIRECTION_LISTENER, context);
}
default void setDirection(Context context, FlexDirection direction) {
getDirectionProperty(context).setValue(direction);
}
default void setDirection(FlexDirection direction) {
addPrefixBinding(context -> setDirection(context, direction));
}
default void reverseDirection(Context context) {
createNewInitializedProperty(PARENT_DIRECTION_LISTENER, context, (ChangeListener<FlexDirection>) ((o, v, nv) -> setDirection(context, nv.reverse())));
startTrackingDirection(context, direction -> direction != null ? direction.reverse() : FlexDirection.ROW);
}
default void reverseDirection() {
addPrefixBinding(context -> reverseDirection(context));
}
default void keepDirection(Context context) {
createNewInitializedProperty(PARENT_DIRECTION_LISTENER, context, (ChangeListener<FlexDirection>) ((o, v, nv) -> setDirection(context, nv)));
startTrackingDirection(context, direction -> direction);
}
default void keepDirection() {
addPrefixBinding(context -> keepDirection(context));
}
default void startTrackingDirection(Context context, Function<FlexDirection, FlexDirection> getInitialDirection) {
if (FlexDirectionDefaults.class.isAssignableFrom(((Tag) this).getParent().getClass())) {
Context parentContext = ((Tag) this).getMetaBinding() != null ? context.getParent() : context;
Property<FlexDirection> parentDirection = ((FlexDirectionDefaults) ((Tag) this).getParent()).getDirectionProperty(parentContext);
setDirection(context, getInitialDirection.apply(parentDirection.getValue()));
parentDirection.addListener(getDirectionListenerProperty(context).getValue());
} else
throw new IllegalStateException("The class of the parent must implement FlexDirectionDefaults when reverseDirection or keepDirection is used.");
}
default void stopTrackingDirection(Context context) {
Context parentContext = ((Tag) this).getMetaBinding() != null ? context.getParent() : context;
Property<FlexDirection> parentDirection = ((FlexDirectionDefaults) ((Tag) this).getParent()).getDirectionProperty(parentContext);
parentDirection.removeListener(getDirectionListenerProperty(context).getValue());
context.getAttributes((Tag) this).remove(PARENT_DIRECTION_LISTENER);
}
}