RoundRectangleRadiusHandle.java

/*
 * @(#)RoundRectRadiusHandle.java
 *
 * Copyright (c) 1996-2010 The authors and contributors of JHotDraw.
 * You may not use, copy or modify this file, except in compliance with the 
 * accompanying license terms.
 */
package org.jhotdraw.draw.handle;

import org.jhotdraw.draw.*;
import org.jhotdraw.draw.event.CompositeFigureEdit;
import org.jhotdraw.geom.Geom;
import org.jhotdraw.util.*;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.geom.*;
import org.jhotdraw.undo.PropertyChangeEdit;

/**
 * A {@link Handle} to manipulate the corner radius of a
 * {@link RoundRectangleFigure}.
 *
 * @author  Werner Randelshofer
 * @version $Id$
 */
public class RoundRectangleRadiusHandle extends AbstractHandle {

    private static final int OFFSET = 6;
    private Point originalArc;

    /** Creates a new instance. */
    public RoundRectangleRadiusHandle(Figure owner) {
        super(owner);
    }

    /**
     * Draws this handle.
     */
    @Override
    public void draw(Graphics2D g) {
        if (getEditor().getTool().supportsHandleInteraction()) {
            drawDiamond(g,
                    getEditor().getHandleAttribute(HandleAttributeKeys.ATTRIBUTE_HANDLE_FILL_COLOR),
                    getEditor().getHandleAttribute(HandleAttributeKeys.ATTRIBUTE_HANDLE_STROKE_COLOR));
        } else {
            drawDiamond(g,
                    getEditor().getHandleAttribute(HandleAttributeKeys.ATTRIBUTE_HANDLE_FILL_COLOR_DISABLED),
                    getEditor().getHandleAttribute(HandleAttributeKeys.ATTRIBUTE_HANDLE_STROKE_COLOR_DISABLED));
        }
    }

    @Override
    protected Rectangle basicGetBounds() {
        Rectangle r = new Rectangle(locate());
        int h = getHandlesize();
        r.x -= h / 2;
        r.y -= h / 2;
        r.width = r.height = h;
        return r;
    }

    private Point locate() {
        RoundRectangleFigure owner = (RoundRectangleFigure) getOwner();
        Rectangle r = view.drawingToView(owner.getBounds());
        Point arc = view.drawingToView(new Point2D.Double(owner.getArcWidth(), owner.getArcHeight()));
        return new Point(r.x + arc.x / 2 + OFFSET, r.y + arc.y / 2 + OFFSET);
    }

    @Override
    public void trackStart(Point anchor, int modifiersEx) {
        RoundRectangleFigure owner = (RoundRectangleFigure) getOwner();
        originalArc = view.drawingToView(new Point2D.Double(owner.getArcWidth(), owner.getArcHeight()));
    }

    @Override
    public void trackStep(Point anchor, Point lead, int modifiersEx) {
        int dx = lead.x - anchor.x;
        int dy = lead.y - anchor.y;
        RoundRectangleFigure owner = (RoundRectangleFigure) getOwner();
        Rectangle r = view.drawingToView(owner.getBounds());
        Point viewArc = new Point(
                Geom.range(0, r.width, 2 * (originalArc.x / 2 + dx)),
                Geom.range(0, r.height, 2 * (originalArc.y / 2 + dy)));
        Point2D.Double arc = view.viewToDrawing(viewArc);
        owner.willChange();
        owner.setArc(arc.x, arc.y);
        owner.changed();
    }

    @Override
    public void trackEnd(Point anchor, Point lead, int modifiersEx) {
        int dx = lead.x - anchor.x;
        int dy = lead.y - anchor.y;
        RoundRectangleFigure owner = (RoundRectangleFigure) getOwner();
        Rectangle r = view.drawingToView(owner.getBounds());
        Point viewArc = new Point(
                Geom.range(0, r.width, 2 * (originalArc.x / 2 + dx)),
                Geom.range(0, r.height, 2 * (originalArc.y / 2 + dy)));
        Point2D.Double oldArc = view.viewToDrawing(originalArc);
        Point2D.Double newArc = view.viewToDrawing(viewArc);

        ResourceBundleUtil labels =
                ResourceBundleUtil.getBundle("org.jhotdraw.draw.Labels");
        CompositeFigureEdit edit = new CompositeFigureEdit(owner, labels.getString("attribute.roundRectRadius"));
        fireUndoableEditHappened(edit);
        fireUndoableEditHappened(new PropertyChangeEdit(owner, RoundRectangleFigure.ARC_WIDTH_PROPERTY, oldArc.x, newArc.x));
        fireUndoableEditHappened(new PropertyChangeEdit(owner, RoundRectangleFigure.ARC_HEIGHT_PROPERTY, oldArc.y, newArc.y));
        fireUndoableEditHappened(edit);
    }

    @Override
    public void keyPressed(KeyEvent evt) {
        RoundRectangleFigure owner = (RoundRectangleFigure) getOwner();
        Point2D.Double oldArc = new Point2D.Double(owner.getArcWidth(), owner.getArcHeight());
        Point2D.Double newArc = new Point2D.Double(owner.getArcWidth(), owner.getArcHeight());
        switch (evt.getKeyCode()) {
            case KeyEvent.VK_UP:
                if (newArc.y > 0) {
                    newArc.y = Math.max(0, newArc.y - 1);
                }
                evt.consume();
                break;
            case KeyEvent.VK_DOWN:
                newArc.y += 1;
                evt.consume();
                break;
            case KeyEvent.VK_LEFT:
                if (newArc.x > 0) {
                    newArc.x = Math.max(0, newArc.x - 1);
                }
                evt.consume();
                break;
            case KeyEvent.VK_RIGHT:
                newArc.x += 1;
                evt.consume();
                break;
        }
        if (!newArc.equals(oldArc)) {
            owner.willChange();
            owner.setArcWidth(newArc.x);
            owner.setArcHeight(newArc.y);
            owner.changed();
            ResourceBundleUtil labels =
                    ResourceBundleUtil.getBundle("org.jhotdraw.draw.Labels");
            CompositeFigureEdit edit = new CompositeFigureEdit(owner, labels.getString("attribute.roundRectRadius"));
            fireUndoableEditHappened(edit);
            fireUndoableEditHappened(new PropertyChangeEdit(owner, RoundRectangleFigure.ARC_WIDTH_PROPERTY, oldArc.x, newArc.x));
            fireUndoableEditHappened(new PropertyChangeEdit(owner, RoundRectangleFigure.ARC_HEIGHT_PROPERTY, oldArc.y, newArc.y));
            fireUndoableEditHappened(edit);
        }
    }

    @Override
    public String getToolTipText(Point p) {
        return ResourceBundleUtil.getBundle("org.jhotdraw.draw.Labels").//
                getString("handle.roundRectangleRadius.toolTipText");
    }
}