CyanNodeReshapeHandleProvider.java

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 **
 ** This demo file is part of yFiles for JavaFX 3.6.
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 ** Copyright (c) 2000-2023 by yWorks GmbH, Vor dem Kreuzberg 28,
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package input.reshapehandleproviderconfiguration;

import com.yworks.yfiles.geometry.IPoint;
import com.yworks.yfiles.geometry.PointD;
import com.yworks.yfiles.graph.INode;
import com.yworks.yfiles.view.input.ClickEventArgs;
import com.yworks.yfiles.view.input.HandlePositions;
import com.yworks.yfiles.view.input.HandleTypes;
import com.yworks.yfiles.view.input.IEventRecognizer;
import com.yworks.yfiles.view.input.IHandle;
import com.yworks.yfiles.view.input.IInputModeContext;
import com.yworks.yfiles.view.input.IReshapeHandler;
import com.yworks.yfiles.view.input.NodeReshapeHandleProvider;
import com.yworks.yfiles.view.input.NodeReshapeHandlerHandle;
import javafx.scene.Cursor;

/**
 * A {@link NodeReshapeHandlerHandle} for cyan nodes that toggles aspect ratio resizing on and off when clicking on its handles.
 */
class CyanNodeReshapeHandleProvider extends NodeReshapeHandleProvider {
    private final ApplicationState applicationState;

    public CyanNodeReshapeHandleProvider(INode node, IReshapeHandler reshapeHandler, ApplicationState applicationState) {
        super(node, reshapeHandler, HandlePositions.BORDER);
        this.applicationState = applicationState;
    }

    @Override
    public IHandle getHandle(IInputModeContext inputModeContext, HandlePositions position) {
        NodeReshapeHandlerHandle wrapped = (NodeReshapeHandlerHandle) super.getHandle(inputModeContext, position);
        wrapped.setRatioReshapeRecognizer(applicationState.isKeepingAspectRatioEnabled() ? IEventRecognizer.ALWAYS : IEventRecognizer.NEVER);
        return new ClickableNodeReshapeHandlerHandle(wrapped);
    }

    /**
     * A handle delegating most functionality to a wrapped {@link NodeReshapeHandlerHandle}.
     * <p>
     * {@link IHandle#handleClick(ClickEventArgs)} toggles the {@link ApplicationState#isKeepingAspectRatioEnabled()} state.
     */
    private class ClickableNodeReshapeHandlerHandle implements IHandle {
        private final NodeReshapeHandlerHandle wrapped;

        public ClickableNodeReshapeHandlerHandle(NodeReshapeHandlerHandle wrapped) {
            this.wrapped = wrapped;
        }

        /**
         * {@link ApplicationState#toggleAspectRatio() Toggles} the {@link ApplicationState#isKeepingAspectRatioEnabled()} state.
         *
         * @param eventArgs Arguments describing the click.
         */
        @Override
        public void handleClick(ClickEventArgs eventArgs) {
            applicationState.toggleAspectRatio();
        }

        /**
         * Modifies the wrapped {@link IHandle#getType()} by combining it with {@link HandleTypes.VARIANT2}.
         */
        @Override
        public HandleTypes getType() {
            return applicationState.isKeepingAspectRatioEnabled() ? wrapped.getType().or(HandleTypes.VARIANT2) : wrapped.getType();
        }

        @Override
        public IPoint getLocation() {
            return wrapped.getLocation();
        }

        @Override
        public Cursor getCursor() {
            return wrapped.getCursor();
        }

        @Override
        public void initializeDrag(IInputModeContext context) {
            wrapped.initializeDrag(context);
        }

        @Override
        public void handleMove(IInputModeContext context, PointD originalLocation, PointD newLocation) {
            wrapped.handleMove(context, originalLocation, newLocation);
        }

        @Override
        public void cancelDrag(IInputModeContext context, PointD originalLocation) {
            wrapped.cancelDrag(context, originalLocation);
        }

        @Override
        public void dragFinished(IInputModeContext context, PointD originalLocation, PointD newLocation) {
            wrapped.dragFinished(context, originalLocation, newLocation);
        }
    }
}