package org.das2.graph;

import java.awt.*;

public class RowRowConnector extends DasCanvasComponent implements java.beans.PropertyChangeListener {

    private DasCanvas parent;

    private DasRow leftRow;
    private DasRow rightRow;

    private DasColumn leftColumn;
    private DasColumn rightColumn;

    private boolean centerRightRow= false; // this causes a funny bug
    
    public RowRowConnector( DasCanvas parent, DasRow leftRow, DasRow rightRow, DasColumn leftColumn, DasColumn rightColumn ) {
        this.leftRow= leftRow;
        this.rightRow= rightRow;
        this.leftColumn= leftColumn;
        this.rightColumn= rightColumn;
        this.parent= parent;
        leftRow.addPropertyChangeListener(this);
        rightRow.addPropertyChangeListener(this);
        rightColumn.addPropertyChangeListener(this);
        leftColumn.addPropertyChangeListener(this);
    }

    private Rectangle getMyBounds() {
        if ( centerRightRow ) {
            int rightHeight= rightRow.getHeight();
            int leftCenter= leftRow.getDMiddle();
            if ( leftCenter - rightHeight/2 < 0 ) leftCenter= rightHeight / 2;
            if ( leftCenter + rightHeight/2 > parent.getHeight() ) leftCenter= parent.getHeight() - rightHeight / 2;
            rightRow.setDPosition( leftCenter-rightHeight/2, leftCenter+rightHeight/2 );
        }
        
        int xleft= leftColumn.getDMaximum();
        int xright= rightColumn.getDMaximum();
        int ylow= Math.max( leftRow.getDMaximum(), rightRow.getDMaximum() );
        int yhigh= Math.min( leftRow.getDMinimum(), rightRow.getDMinimum() );

        Rectangle result= new Rectangle( xleft, yhigh, (xright-xleft), (ylow-yhigh+2) );
        return result;
    }

    public void setLeftRow( DasRow row ) {
        this.leftRow= row;
        update();
    }

    public void resize() {
        setBounds(getMyBounds());
    }

    protected void paintComponent(Graphics g1) {
        Graphics2D g= (Graphics2D)g1.create();
        g.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON );
        g.translate(-getX(), -getY());

        int hlen=3;

        int x1= leftColumn.getDMaximum()+hlen;
        int x2= rightColumn.getDMaximum()-hlen;
        int ylow1= leftRow.getDMaximum();
        int ylow2= rightRow.getDMaximum();
        int yhigh1= leftRow.getDMinimum();
        int yhigh2= rightRow.getDMinimum();

        g.setColor(Color.lightGray);
        g.draw(new java.awt.geom.Line2D.Double(x1-hlen,ylow1,x1,ylow1));
        g.draw(new java.awt.geom.Line2D.Double(x2,ylow2,x2+hlen,ylow2));
        g.draw(new java.awt.geom.Line2D.Double(x1,ylow1,x2,ylow2));
        g.draw(new java.awt.geom.Line2D.Double(x1-hlen,yhigh1,x1,yhigh1));
        g.draw(new java.awt.geom.Line2D.Double(x2,yhigh2,x2+hlen,yhigh2));
        g.draw(new java.awt.geom.Line2D.Double(x1,yhigh1,x2,yhigh2));

        g.dispose();

        getDasMouseInputAdapter().paint(g1);
    }

    public void propertyChange(java.beans.PropertyChangeEvent propertyChangeEvent) {
        markDirty();
        update();
    }

}