/**
 * Copyright 2010-2023 JogAmp Community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of JogAmp Community.
 */
package com.jogamp.graph.ui.shapes;

import com.jogamp.graph.curve.OutlineShape;
import com.jogamp.graph.ui.GraphShape;

/**
 * An abstract GraphUI round Button {@link GraphShape}
 * <p>
 * GraphUI is GPU based and resolution independent.
 * </p>
 * <p>
 * This button is rendered with a round oval shape.
 * To render it rectangular, {@link #setCorner(float)} to zero.
 * </p>
 */
public abstract class RoundButton extends GraphShape {

    /** {@value} */
    public static final float DEFAULT_CORNER = 1f;
    protected float width;
    protected float height;
    protected float corner = DEFAULT_CORNER;

    protected RoundButton(final int renderModes, final float width, final float height) {
        super(renderModes);
        this.width = width;
        this.height = height;
    }

    public final float getWidth() { return width; }

    public final float getHeight() { return height; }

    public final float getCorner() { return corner; }

    public void setSize(final float width, final float height) {
        this.width = width;
        this.height = height;
        markShapeDirty();
    }

    protected void createSharpOutline(final OutlineShape shape, final float zOffset) {
        final float tw = getWidth();
        final float th = getHeight();

        final float minX = 0;
        final float minY = 0;
        final float minZ = zOffset;

        shape.addVertex(minX, minY, minZ,  true);
        shape.addVertex(minX+tw, minY,  minZ, true);
        shape.addVertex(minX+tw, minY + th, minZ,  true);
        shape.addVertex(minX, minY + th, minZ,  true);
        shape.closeLastOutline(true);
    }

    protected void createCurvedOutline(final OutlineShape shape, final float zOffset) {
        final float tw = getWidth();
        final float th = getHeight();
        final float dC = 0.5f*corner*Math.min(tw, th);

        final float minX = 0;
        final float minY = 0;
        final float minZ = zOffset;

        shape.addVertex(minX,           minY + dC,      minZ, true);
        shape.addVertex(minX,           minY,           minZ, false);

        shape.addVertex(minX + dC,      minY,           minZ, true);

        shape.addVertex(minX + tw - dC, minY,           minZ, true);
        shape.addVertex(minX + tw,      minY,           minZ, false);
        shape.addVertex(minX + tw,      minY + dC,      minZ, true);
        shape.addVertex(minX + tw,      minY + th- dC,  minZ, true);
        shape.addVertex(minX + tw,      minY + th,      minZ, false);
        shape.addVertex(minX + tw - dC, minY + th,      minZ, true);
        shape.addVertex(minX + dC,      minY + th,      minZ, true);
        shape.addVertex(minX,           minY + th,      minZ, false);
        shape.addVertex(minX,           minY + th - dC, minZ, true);

        shape.closeLastOutline(true);
    }

    /** Set corner size, default is {@link #DEFAULT_CORNER} */
    public void setCorner(final float corner) {
        if(corner > 1.0f){
            this.corner = 1.0f;
        }
        else if(corner < 0.01f){
            this.corner = 0.0f;
        }
        else{
            this.corner = corner;
        }
        markShapeDirty();
    }

    @Override
    public String getSubString() {
        return super.getSubString()+", dim "+getWidth() + " x " + getHeight() + ", corner " + corner;
    }
}