/*
 * Copyright(c) 2001-2010, FineReport  Inc, All Rights Reserved.
 */
package com.fr.grid;

import java.awt.Dimension;

import com.fr.base.GraphHelper;
import com.fr.design.mainframe.DesignerUIModeConfig;
import com.fr.design.mainframe.ElementCasePane;

/**
 * GridRow used to paint and edit grid row.
 *
 * @editor zhou
 * @since 2012-3-22下午6:12:03
 */
public class GridRow extends GridHeader<Integer> {

    private static final int MAX = 4;
    private int adsorbHeight;
    private GridRowMouseHandler gridRowMouseHandler;

    public GridRow(int resolution) {
        this(resolution, 0);
    }

    public GridRow(int resolution, int adsorbHeight) {
        super(resolution);
        this.adsorbHeight = adsorbHeight;
    }


    @Override
    protected void initByConstructor() {
        this.updateUI();
    }

    @Override
    public Integer getDisplay(int index) {
        return new Integer(index + 1);
    }

    @Override
    public void updateUI() {
        this.removeMouseListener(gridRowMouseHandler);
        this.removeMouseMotionListener(gridRowMouseHandler);
        gridRowMouseHandler = new GridRowMouseHandler(this, adsorbHeight);
        this.addMouseListener(gridRowMouseHandler);
        this.addMouseMotionListener(gridRowMouseHandler);
        this.setUI(new GridRowUI(resolution));
    }


    /**
     * Gets the preferred size.
     */
    @Override
    public Dimension getPreferredSize() {
        ElementCasePane reportPane = this.getElementCasePane();
        float time = (float) reportPane.getResolution() / DesignerUIModeConfig.getInstance().getScreenResolution();
        if (!(reportPane.isRowHeaderVisible())) {
            return new Dimension(0, 0);
        }

        int maxCharNumber = this.caculateMaxCharNumber(reportPane);
        return new Dimension((int) (maxCharNumber * GraphHelper.getFontMetrics(this.getFont()).charWidth('M') * time), super.getPreferredSize().height);
    }

    /**
     * Calculates max char number.
     */
    private int caculateMaxCharNumber(ElementCasePane reportPane) {
        int maxCharNumber = MAX;
        maxCharNumber = Math.max(maxCharNumber, ("" + (reportPane.getGrid().getVerticalValue() + reportPane.getGrid().getVerticalExtent())).length() + 1);

        return maxCharNumber;
    }
}