package com.onaro.util.chart;

import ilog.views.chart.*;
import ilog.views.chart.action.*;
import ilog.views.chart.event.*;

import javax.swing.*;
import java.awt.event.*;

public class AutoYChartZoomAction extends IlvChartZoomAction implements AxisListener {
    private static final long serialVersionUID = 1L;

    public AutoYChartZoomAction(Icon icon, char keyChar, String tooltip, double factor) {
        super(null, icon, KeyStroke.getKeyStroke(keyChar), tooltip, null, factor);
        setEnabled(false);
    }


    protected void computeEnabled() {
//            do nothing. enabled calculation will be done upon axisRangeChanged
    }

    protected void attach() {
        super.attach();
        getChart().getXAxis().addAxisListener(this);
    }

    protected void detach() {
        getChart().getXAxis().removeAxisListener(this);
        super.detach();
    }

    public void actionPerformed(ActionEvent actionEvent) {
        if (isEnabled() && getChart() != null){
            IlvDataWindow window = calcWindowToZoom();
            if (AutoYZoomInteractor.moreThanMinPointInRange(window, getChart())) {
                AutoYZoomInteractor.performAnimatedZoom(getChart(),getYAxisIndex(),window, 10);
            }
        }
    }

    private IlvDataWindow calcWindowToZoom() {
        IlvDataInterval xVisibleRange = getXAxis().getVisibleRange();
        double part = xVisibleRange.getLength() / getZoomFactor();
        double start = xVisibleRange.getMiddle() - part / 2D;
        double end = xVisibleRange.getMiddle() + part / 2D;
        IlvDataInterval xRange = new IlvDataInterval(start, end);
        IlvDataInterval autoCalculatedYRange = AutoYZoomInteractor.getYDataRange(getChart(), 0, xRange);
        return new IlvDataWindow(xRange, autoCalculatedYRange);
    }

    public void axisRangeChanged(AxisRangeEvent axisRangeEvent) {
        if (!axisRangeEvent.isAboutToChangeEvent()){
            if (getZoomFactor() > 1.0) {
                IlvDataWindow windowToZoom = calcWindowToZoom();
                setEnabled(AutoYZoomInteractor.moreThanMinPointInRange(windowToZoom, getChart()));
            }else{
                super.computeEnabled();
            }
        }
    }

    public void axisChanged(AxisChangeEvent axisChangeEvent) {
        //nothing
    }
}