DateAxis on Domain with fixed ticks / labels !? (autorange)

[mentox]

Hi,

i have an stacked area with dataaxis in domain an autorange on.

its great .. but i want that the first x ticks or lable is always on the 0 position. i mean left down of chart.

the value on axis can odd..


i have an sceenshot but in this forum i cant attache one


i hope you know want i mean


kind regards dominique

[mentox]

found an free upload center

[david.gilbert]

There's no option you can set to achieve that. It's something that a number of people have asked for, and I'd like to implement it, but haven't found time to do it yet.

As a workaround, you could subclass the axis, and override the refreshTicks() method to return whatever ticks you require.

[mentox]

have it ... totaly simple .. work for me

Code: Select all

import java.util.Date;

import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.axis.DateTickUnit;

public class FixDateAxis extends DateAxis {

    private static final long serialVersionUID = 1L;

    @Override
    /**
     * Calculates the value of the lowest visible tick on the axis.
     * 
     * @param unit
     *                date unit to use.
     * 
     * @return The value of the lowest visible tick on the axis.
     */
    public Date calculateLowestVisibleTickValue(DateTickUnit unit) {
        return getMinimumDate();
    }
}

thanks for help
greetings dominique

[mentox]

Hi,

i also made an Fixed Vertical Axis, because i have some charts and all should have the same width.

in this case you make an FixNuberAxis and set the FixWidth which are the number of charaters

feel free to use them .. perhaps is insperete you (david.gilbert) to include it in jfreechart

Code: Select all

import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.font.LineMetrics;
import java.awt.geom.Rectangle2D;
import java.util.Iterator;
import java.util.List;

import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.Tick;
import org.jfree.text.TextUtilities;
import org.jfree.ui.RectangleInsets;

public class FixNumberAxis extends NumberAxis {

    private static final long serialVersionUID = 1L;

    private int fixWidth = -1;

    @Override
    /**
     * A utility method for determining the width of the widest tick label.
     * 
     * @param ticks
     *                the ticks.
     * @param g2
     *                the graphics device.
     * @param drawArea
     *                the area within which the plot and axes should be drawn.
     * @param vertical
     *                a flag that indicates whether or not the tick labels are
     *                'vertical'.
     * 
     * @return The width of the tallest tick label.
     */
    protected double findMaximumTickLabelWidth(List ticks, Graphics2D g2, Rectangle2D drawArea, boolean vertical) {

        RectangleInsets insets = getTickLabelInsets();
        Font font = getTickLabelFont();
        double maxWidth = 0.0;
        if (!vertical) {
            FontMetrics fm = g2.getFontMetrics(font);
            Iterator iterator = ticks.iterator();
            while (iterator.hasNext()) {
                Tick tick = (Tick) iterator.next();
                Rectangle2D labelBounds;
                if (fixWidth > 0) {
                    labelBounds = TextUtilities.getTextBounds(String.valueOf(new char[fixWidth]), g2, fm);
                } else {
                    labelBounds = TextUtilities.getTextBounds(tick.getText(), g2, fm);
                }
                if (labelBounds.getWidth() + insets.getLeft() + insets.getRight() > maxWidth) {
                    maxWidth = labelBounds.getWidth() + insets.getLeft() + insets.getRight();
                }
            }
        } else {
            LineMetrics metrics = font.getLineMetrics("ABCxyz", g2.getFontRenderContext());
            maxWidth = metrics.getHeight() + insets.getTop() + insets.getBottom();
        }
        return maxWidth;
    }

    public int getFixWidth() {
        return fixWidth;
    }

    public void setFixWidth(int fixWidth) {
        this.fixWidth = fixWidth;
    }
}

[mentox]

here is an other version...

the code is not so nice but the result is much more nicer

Code: Select all

import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics2D;
import java.awt.font.LineMetrics;
import java.awt.geom.Rectangle2D;
import java.util.Iterator;
import java.util.List;

import org.jfree.chart.axis.NumberAxis;
import org.jfree.chart.axis.Tick;
import org.jfree.text.TextUtilities;
import org.jfree.ui.RectangleInsets;

public class FixNumberAxis extends NumberAxis {

    private static final long serialVersionUID = 1L;

    private int fixWidth = -1;

    @Override
    /**
     * A utility method for determining the width of the widest tick label.
     * 
     * @param ticks
     *                the ticks.
     * @param g2
     *                the graphics device.
     * @param drawArea
     *                the area within which the plot and axes should be drawn.
     * @param vertical
     *                a flag that indicates whether or not the tick labels are
     *                'vertical'.
     * 
     * @return The width of the tallest tick label.
     */
    protected double findMaximumTickLabelWidth(List ticks, Graphics2D g2, Rectangle2D drawArea, boolean vertical) {

        RectangleInsets insets = getTickLabelInsets();
        Font font = getTickLabelFont();
        double maxWidth = 0.0;
        if (!vertical) {
            FontMetrics fm = g2.getFontMetrics(font);
            Iterator iterator = ticks.iterator();
            while (iterator.hasNext()) {
                Tick tick = (Tick) iterator.next();
                Rectangle2D labelBounds;
                if (fixWidth > 0) {
                    labelBounds = TextUtilities.getTextBounds(createEmptyString(fixWidth), g2, fm);
                } else {
                    labelBounds = TextUtilities.getTextBounds(tick.getText(), g2, fm);
                }
                if (labelBounds.getWidth() + insets.getLeft() + insets.getRight() > maxWidth) {
                    maxWidth = labelBounds.getWidth() + insets.getLeft() + insets.getRight();
                }
            }
        } else {
            LineMetrics metrics = font.getLineMetrics("ABCxyz", g2.getFontRenderContext());
            maxWidth = metrics.getHeight() + insets.getTop() + insets.getBottom();
        }
        return maxWidth;
    }

    public int getFixWidth() {
        return fixWidth;
    }

    public void setFixWidth(int fixWidth) {
        this.fixWidth = fixWidth;
    }

    private String createEmptyString(int width) {
        String fixWidthString = "";
        for (int i = 0; i < width; i++) {
            fixWidthString += "0";
        }
        return fixWidthString;
    }
}