Reduce space between legend and chart in jfree Pie chart - jfreechart

I placed the legend in the top left corner and there is an unnecessary gap between the chart and the legend.
How to reduce this?
There is considerable amount of space between pie chart and its border.
public void setPie() {
RingPlot plot = (RingPlot) this.chart.getPlot();
plot.setSectionPaint("", WHITE_COLOR);
plot.setCircular(true);
plot.setShadowPaint(null);
}
public void setLegend() {
LegendTitle legend = this.chart.getLegend();
legend.setVerticalAlignment(VerticalAlignment.TOP);
legend.setVisible(true);
legend.setPosition(RectangleEdge.LEFT);
Rectangle rect = new Rectangle(LEGEND_LENGTH, LEGEND_WIDTH);
RingPlot plot = (RingPlot) this.chart.getPlot();
plot.setLegendItemShape((Shape) rect);
}

You could try tweaking the margins around the LegendTitle. Something like:
chart.getLegend().setMargin(top, left, bottom, right);
EDIT: As suggested in the post in the comments, you could try to draw the legend manually at a given position:
//Print legend at X & Y location
Rectangle2D r2DD = new Rectangle2D.Double(119, 47, 120, 180);
LegendTitle legend = new LegendTitle(chart.getPlot());
legendTitle.draw(g2,r2DD);
But I'm not sure how to implement it, as you need access to the ChartPanel's Graphics2D. Perhaps by extending ChartPanel and overriding paintComponent(Graphics g) ?

Related

JFreeChart: crosshair label custom position

Is it possible to place crosshair label in the custom position? I have x and y crosshair. I want that y crosshair label was positioned near the data point (change label offset X coordinate).
The problem is that RectangleAnchor has no such option
Crosshair yCrosshair = new Crosshair(Double.NaN, Color.DARK_GRAY, new BasicStroke(0f));
yCrosshair.setLabelAnchor(RectangleAnchor.CENTER);
And it seems that JFreeChart completely ignores label offset settings:
Crosshair yCrosshair = new Crosshair(Double.NaN, Color.DARK_GRAY, new BasicStroke(0f));
yCrosshair.setLabelXOffset(5);
I have the desired plot coordinates for the label in the mouse listener but I can't find how to apply it to the label position.
Ok I've solved my problem by using XYPointerAnnotation.
XYPointerAnnotation pointer = new XYPointerAnnotation( "", 0, 0, 7.0 * Math.PI / 4.0 );
pointer.setTipRadius(3.0);
pointer.setBaseRadius(15.0);
pointer.setPaint(Color.blue);
pointer.setTextAnchor(TextAnchor.HALF_ASCENT_LEFT);
pointer.setBackgroundPaint(new Color(180, 180, 180, 180));
And on mouse move event I've position the annotation to the desired point
mainPlot.removeAnnotation(pointer);
if ( !sY.isNaN() ) {
pointer.setX(x);
pointer.setY(sY);
pointer.setText("POWER: "+ sY);
mainPlot.addAnnotation(pointer);
}

Move column label outside (Horizontal Bar Chart)

I need to move labels outside from bars, towards right. Image link is given above.
Bar chart label code:
BarRenderer br = (BarRenderer) plot.getRenderer();
br.setItemMargin(0);
br.setSeriesPaint(0, new java.awt.Color(227, 110, 37));
br.setBaseItemLabelGenerator(new StandardCategoryItemLabelGenerator());
br.setBaseItemLabelsVisible(true);
br.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.INSIDE3, TextAnchor.CENTER_RIGHT, TextAnchor.CENTER, 0.0));

Exporting TeeChart as Image

We are using TeeChart for .net (Version 4.1.2013.7302) in our forms application.
One of the charts in our product has Y Axis scrolling enabled. This makes some portion of chart visible at a given instance. To see other part of chart, user needs to use the scrollbar. A separate scrollbar is used instead of axis scrollbar, as there will be a adjoining grid control and; both chart & grid are expected to be scrolled using common scrollbar. Following is the sample form image depicting the scenario:
We are using TeeChart's export functionality to export this chart as an image. But since chart has scrolling enabled (i.e. minimum of chart is not visible by default); TeeChart is exporting only visible portion of Chart, and not the entire chart. Following is the image of chart exported:
Please suggest if there exists any way to export the entire chart as an image, and not just the visible portion of it?
Thanks in Advance.
Here's a fuller version of Yeray's code that fills out the exported image to the size of the full, mainly non-visible chart:
private void button11_Click(object sender, EventArgs e)
{
//get zoomed axis min maxes
double xtmpMin = tChart1.Axes.Bottom.Minimum;
double xtmpMax = tChart1.Axes.Bottom.Maximum;
double ytmpMin = tChart1.Axes.Left.Minimum;
double ytmpMax = tChart1.Axes.Left.Maximum;
//how many pixels are plotted for the axes' ranges
int yPixelRange = tChart1.Axes.Left.CalcPosValue(tChart1.Axes.Left.Minimum)-tChart1.Axes.Left.CalcPosValue(tChart1.Axes.Left.Maximum);
int xPixelRange = tChart1.Axes.Bottom.CalcPosValue(tChart1.Axes.Bottom.Maximum) - tChart1.Axes.Bottom.CalcPosValue(tChart1.Axes.Bottom.Minimum);
//get the chart header/footer space to re-apply to chart
int yMargins = tChart1.Bounds.Height - yPixelRange;
int xMargins = tChart1.Bounds.Width - xPixelRange;
//how many pixels are we getting per axis scale
double pixelsPerYAxisInt = yPixelRange / (ytmpMax - ytmpMin);
double pixelsPerXAxisInt = xPixelRange / (xtmpMax - xtmpMin);
//what increment are we at. Note. To get this back we may need to mod font size, min separation
double yInc = tChart1.Axes.Left.CalcIncrement;
double xInc = tChart1.Axes.Bottom.CalcIncrement;
//now reset auto axes before plotting full chart. Could use other criteria here
tChart1.Axes.Left.Automatic = true;
tChart1.Axes.Bottom.Automatic = true;
//Repaint full Chart (necessary for positioning calcs)
tChart1.Draw();
//set increments on full scales (note Chart will try to set them,
//but if it can't you have the last word with label separation, font size, etc)
tChart1.Axes.Left.Increment = yInc;
tChart1.Axes.Bottom.Increment = xInc;
//dimension chart for export
double fullYRange = tChart1.Axes.Left.Maximum - tChart1.Axes.Left.Minimum;
double fullXRange = tChart1.Axes.Bottom.Maximum - tChart1.Axes.Bottom.Minimum;
int fullYSize = (int)((pixelsPerYAxisInt * fullYRange) + yMargins);
int fullXSize = (int)((pixelsPerXAxisInt * fullXRange) + xMargins);
//setup and export image
tChart1.Export.Image.PNG.Width = fullXSize;
tChart1.Export.Image.PNG.Height = fullYSize;
tChart1.Export.Image.PNG.Save(#"c:\mypath\chart.png");
//reset screen chart to where it was
tChart1.Axes.Bottom.SetMinMax(xtmpMin, xtmpMax);
tChart1.Axes.Left.SetMinMax(ytmpMin, ytmpMax);
}
There are many ways to optimise that code, Axis does have an iRange that I haven't tried, and some of the steps can be brought together but I hope they are clear and useful and give you something of what you're looking for.
You can manually adjust your axis scale, export your chart and then restore your axis. Ie (if 0 - 4.25 in the bottom axis is the "entire chart"):
double tmpMin = tChart1.Axes.Bottom.Minimum;
double tmpMax = tChart1.Axes.Bottom.Maximum;
tChart1.Axes.Bottom.SetMinMax(0, 4.25);
tChart1.Export.Image.JPEG.Save(myFileName);
tChart1.Axes.Bottom.SetMinMax(tmpMin, tmpMax);

How to add shapes to line graph in jfreechart

Edited to add working image at end.
I need to add some sort of annotation to a line graph that I've generated. The red line is the data I'm graphing successfully using a XYLineChart and a XYLineAndShapeRenderer. The squares and text are samples of what I would like to add but have been unable to get working. The data for the graph may be updated as fast as once per second.
Here is how I'm creating the chart:
private JFreeChart createChart(XYDataset dataset) {
final JFreeChart result = ChartFactory.createXYLineChart(
TITLE, // chart title
XAXIS, // domain axis label (x-axis)
YAXIS, // range axis label (y-axis)
dataset, // data
PlotOrientation.VERTICAL, // orientation
false, // include legend
true, // tooltips?
false // URLs?
);
customizeChart(result);
return result;
}
private void customizeChart(final JFreeChart result) {
// NOW DO SOME OPTIONAL CUSTOMIZATION OF THE CHART...
// set the background color for the chart...
result.setBackgroundPaint(null); //makes background transparent.
// get a reference to the plot for further customisation...
XYPlot plot = (XYPlot) result.getPlot();
plot.setRangeAxisLocation(AxisLocation.BOTTOM_OR_LEFT);
plot.setRangePannable(false);
XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(true, true);
// I've also tried to use a spline renderer
// XYSplineRenderer renderer = new XYSplineRenderer();
renderer.setSeriesShapesVisible(0, false);
renderer.setBaseShapesVisible(true);
plot.setRenderer(renderer);
// set the range axis to display integers only...
NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
rangeAxis.setTickUnit(new NumberTickUnit(10.0)); //otherwise tick units will randomly change to be 5's sometimes.
//set the max/min values
rangeAxis.setUpperBound(MAX);
rangeAxis.setLowerBound(MIN);
// rangeAxis.setInverted(true);
rangeAxis.setInverted(false);
//get the other axis for work in the next step.
NumberAxis domainAxis = (NumberAxis) plot.getDomainAxis();
domainAxis.setAutoRange(true);
domainAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
//do some font stuff
Font axisFont = new Font("Tahoma", Font.BOLD, 12);
Font tickFont = new Font("Tahoma", Font.PLAIN, 11);
Font titleFont = new Font("Tahoma", Font.BOLD, 18);
result.getTitle().setFont(titleFont);
rangeAxis.setLabelFont(axisFont);
rangeAxis.setTickLabelFont(tickFont);
domainAxis.setLabelFont(axisFont);
domainAxis.setTickLabelFont(tickFont);
}
Here's how I'm trying to get something to draw right now:
XYPlot plot = chart.getXYPlot();
XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer();
BasicStroke stroke = new BasicStroke(2.0f);
Rectangle2D.Double rect = new Rectangle2D.Double(10, 10, 10, 20);
// renderer.addAnnotation(new XYShapeAnnotation(
// rect, stroke, Color.GREEN), Layer.BACKGROUND);
plot.addAnnotation(new XYShapeAnnotation(
rect, stroke, Color.GREEN));
Ellipse2D.Double circle = new Ellipse2D.Double(8, 8, 20, 20);
renderer.addAnnotation(new XYShapeAnnotation(
circle, stroke, blue), Layer.BACKGROUND);
plot.drawAnnotations((Graphics2D) chartPanel.getGraphics(), chartPanel.getBounds(), chartPanel.getChartRenderingInfo().getPlotInfo());
// This line does draw, but immediately disappears
Graphics2D g2 = (Graphics2D) chartPanel.getGraphics();
Line2D line = new Line2D.Double(0, 100, 500, 350);
g2.draw(line);
Thanks.
Edit with working image:
I think maybe the circle and rectangle I was trying to add are off of the visible chart coordinate space.
It may help to note that org.jfree.chart.annotations typically require that coordinates are specified in model (dataset) coordinates, not view (plot) coordinates.

Add image on bar chart dynamically [duplicate]

I have updatable OHLCChart.
I need to draw a line over chart.
How to implement it?
If you want to draw a vertical or horizontal line at a given position on an axis, you can use a ValueMarker :
ValueMarker marker = new ValueMarker(position); // position is the value on the axis
marker.setPaint(Color.black);
//marker.setLabel("here"); // see JavaDoc for labels, colors, strokes
XYPlot plot = (XYPlot) chart.getPlot();
plot.addDomainMarker(marker);
Use plot.addRangeMarker() if you want to draw an horizontal line.
Something like this should work if you want to plot a line indicator (like a moving average for example):
XYDataset dataSet = // your line dataset
CombinedDomainXYPlot plot = (CombinedDomainXYPlot) chart.getPlot();
XYPlot plot = (XYPlot) plot.getSubplots().get(0);
int dataSetIndx = plot.getDatasetCount();
plot.setDataset(dataSetIndx, dataSet);
XYLineAndShapeRenderer lineRenderer = new XYLineAndShapeRenderer(true, false);
plot.setRenderer(dataSetIndx, lineRenderer);

Resources