`/** _______ _____ _____ _____ * |__ __| | __ \ / ____|__ \ * | | __ _ _ __ ___ ______| || | (___ | |__) |* | |/ _` | '__/ __|/ _ \/ __| | | |\___ \|___/ * | | (_| | | \__ \ (_) \__ \ |__| |____) | | * |_|\__,_|_| |___/\___/|___/_____/|_____/|_| * * -------------------------------------------------------------** TarsosDSP is developed by Joren Six at IPEM, University Ghent* * -------------------------------------------------------------** Info: http://0110.be/tag/TarsosDSP * Github: https://github.com/JorenSix/TarsosDSP * Releases: http://0110.be/releases/TarsosDSP/ * * TarsosDSP includes modified source code by various authors,* for credits and info, see README.* */package be.tarsos.dsp.ui.layers;import java.awt.Color;import java.awt.Graphics2D;import java.awt.geom.AffineTransform;import java.awt.geom.NoninvertibleTransformException;import java.awt.geom.Point2D;import java.awt.geom.Rectangle2D;public class LayerUtilities { private LayerUtilities(){ } /** * Transforms pixels to time and frequency. * @param g The current graphics, with a meaningful transform applied to it. * @param x The x coordinate, in pixels. * @param y The y coordinate, in pixels. * @return A point with time (in milliseconds) as x coordinate, and frequency (in cents) as y coordinate. */ public static Point2D pixelsToUnits(Graphics2D g,int x,int y){ Point2D units = null; try { units = g.getTransform().inverseTransform(new Point2D.Double(x,y), null); } catch (NoninvertibleTransformException e1) { e1.printStackTrace(); } return units; } /** * Transforms a number of pixels into a corresponding time or frequency span. E.g. 10 horizontal * pixels could translate to 320 milliseconds. 10 vertical pixels could translate to 32cents. * @param g The current graphics, with a meaningful transform applied to it. * @param pixels The number of pixels * @param horizontal Is it the horizontal or vertical axis? * @return A number of cents or milliseconds. */ public static float pixelsToUnits(Graphics2D g,int pixels,boolean horizontal){ float numberOfUnits=0; try { Point2D originSrc = new Point2D.Double(0,0); Point2D originDest; originDest = g.getTransform().inverseTransform(originSrc, null); Point2D destSrc = new Point2D.Double(pixels,pixels); Point2D destDest; destDest = g.getTransform().inverseTransform(destSrc, null); if(horizontal){ numberOfUnits = (float) (destDest.getX() - originDest.getX()); }else{ numberOfUnits = (float) (- destDest.getY() + originDest.getY()); } } catch (NoninvertibleTransformException e) { e.printStackTrace(); } return numberOfUnits; } public static float unitsToPixels(Graphics2D g, float units, boolean horizontal){ Point2D firstSource = new Point2D.Float(units,units); Point2D firstDest = new Point2D.Float(0, 0); Point2D secondSource = new Point2D.Float(0,0); Point2D secondDest = new Point2D.Float(0, 0); g.getTransform().transform(firstSource, firstDest); g.getTransform().transform(secondSource, secondDest); if(horizontal) return (float) (firstDest.getX()-secondDest.getX()); else return (float) (firstDest.getY()-secondDest.getY()); } public static Rectangle2D drawString(Graphics2D graphics, String text, double x, double y,boolean centerHorizontal,boolean centerVertical,Color backgroundColor){ return drawString(graphics, text, x, y,centerHorizontal, centerVertical, backgroundColor,Color.BLACK); } public static Rectangle2D drawString(Graphics2D graphics, String text, double x, double y,boolean centerHorizontal,boolean centerVertical,Color backgroundColor,Color textColor){ AffineTransform transform = graphics.getTransform(); Point2D source = new Point2D.Double(x,y); Point2D destination = new Point2D.Double(); transform.transform(source, destination); try { transform.invert(); } catch (NoninvertibleTransformException e1) { e1.printStackTrace(); } graphics.transform(transform); Rectangle2D r = graphics.getFontMetrics().getStringBounds(text, graphics); int xPosition = Math.round((float) (destination.getX() - (centerHorizontal ? r.getWidth()/2.0f - 1 : 0) )); int yPosition = Math.round((float) (destination.getY() + (centerVertical ? r.getHeight() /2.0f - 1.5 : 0) )); if(backgroundColor != null){ graphics.setColor(backgroundColor); int width = (int) (r.getMaxY()-r.getMinY()); int height = (int) (r.getMaxX()-r.getMinX()); graphics.fillRect(xPosition,yPosition-width,height,width); } Rectangle2D boundingRectangle = new Rectangle2D.Double(xPosition,yPosition - r.getHeight(),r.getWidth(),r.getHeight()); transform.createTransformedShape(boundingRectangle); graphics.setColor(textColor); graphics.drawString(text,xPosition,yPosition); try { transform.invert(); } catch (NoninvertibleTransformException e1) { e1.printStackTrace(); } graphics.transform(transform); return boundingRectangle; }}`