gistfile1.java

public class ResizingAlgorithm {
  private ImageDimension image;
	
	public ResizingAlgorithm( int width, int height ) {
		this.image = new ImageDimension( width, height );
	}
	
	/**
	 * Redimensiona a largura e o tamanho proporcionavelmente
	 */
	public ImageDimension resizeTo( int width ) {
		double factor = getScaleFactor( width );
		int height = ( int )( image.getHeight() * factor );
		
		return new ImageDimension( width, height );
	}
	
	private double getScaleFactor( int width ) {
		return ( double ) width / image.getWidth();
	}
}