ArcPropView.java

package com.kartoflane.superluminal2.mvc.views.props;

import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.graphics.Color;

import com.kartoflane.superluminal2.mvc.controllers.props.ArcPropController;

public class ArcPropView extends PropView {
	@Override
	public void paintControl(PaintEvent e) {
		if (alpha > 0) {
			ArcPropController apc = (ArcPropController) getController();
			if (apc.getPaintRim()) {
				drawArc(e, apc.getX(), apc.getY(), apc.getW(), apc.getH(), apc.getStartAngle(), apc.getArcSpan(), backgroundColor, alpha);
			} else {
				paintArc(e, apc.getX(), apc.getY(), apc.getW(), apc.getH(), apc.getStartAngle(), apc.getArcSpan(), backgroundColor, alpha);
			}
		}
	}

	protected void paintArc(PaintEvent e, int x, int y, int w, int h, int startAngle, int span, Color backgroundColor, int alpha) {
		if (backgroundColor != null) {
			Color prevBgColor = e.gc.getBackground();
			int prevAlpha = e.gc.getAlpha();

			e.gc.setBackground(backgroundColor);
			e.gc.setAlpha(alpha);

			e.gc.fillArc(x - w / 2, y - h / 2, w, h, startAngle, span);

			e.gc.setBackground(prevBgColor);
			e.gc.setAlpha(prevAlpha);
		}
	}

	protected void drawArc(PaintEvent e, int x, int y, int w, int h, int startAngle, int span, Color borderColor, int alpha) {
		if (borderColor != null) {
			Color prevFgColor = e.gc.getForeground();
			int prevAlpha = e.gc.getAlpha();

			e.gc.setForeground(backgroundColor);
			e.gc.setAlpha(alpha);

			e.gc.drawArc(x - w / 2, y - h / 2, w, h, startAngle, span);

			e.gc.setForeground(prevFgColor);
			e.gc.setAlpha(prevAlpha);
		}
	}
}