I'm using JFreeChart to graph some data, and I've set it up so that the graph shows my standard error for each point as such:
The label shows the Y value for each point, but I'd like to be able to show the Y value for the standard errors as well. Furthermore, is there a way to make it so this data only shows up if hovered over with the mouse?
This is the code I use to add both the error and the labels:
XYErrorRenderer renderer = new XYErrorRenderer();
renderer.setBaseLinesVisible(true);
renderer.setBaseShapesVisible(true);
renderer.setBaseItemLabelGenerator(new StandardXYItemLabelGenerator("{2}",
NumberFormat.getNumberInstance(),NumberFormat.getNumberInstance()));
renderer.setBaseItemLabelsVisible(true);
chart.getXYPlot().setRenderer(renderer);
Thanks in advance.
XYErrorRenderer inherits its implementation of drawItemLabel() from the abstract parent, which knows nothing about the error bars. You'll need to override drawItem() in a custom renderer subclass to draw the extra labels. The source for drawItemLabel() may serve as a guide.
Addendum: A less ambitious alternative would be to display the error range in a tooltip. The custom StandardXYToolTipGenerator below specifies a custom format string and overrides createItemArray() to supply the relevant y values from the dataset. As your XYDataset is a YIntervalSeriesCollection, you can cast it as shown below.
renderer.setBaseToolTipGenerator(new StandardXYToolTipGenerator(
"{0}: {1}…{2}", NumberFormat.getInstance(), NumberFormat.getInstance()) {
#Override
protected Object[] createItemArray(XYDataset data, int series, int item) {
YIntervalSeriesCollection d = (YIntervalSeriesCollection) data;
Object[] result = new Object[3];
double y = d.getYValue(series, item);
result[0] = getYFormat().format(y);
double min = d.getStartYValue(series, item);
result[1] = getYFormat().format(min);
double max = d.getEndYValue(series, item);
result[2] = getYFormat().format(max);
return result;
}
});
Related
We have fairly complicated model in a JTable. In new development I noticed that GUI does not refresh when I call fireTableChanged(...) for individual cells.
So, my question is:
What do I put into TableModelEvent - model row id or view row id?
Looking into JTable code (I have jdk1.8.0_202):
public class JTable extends JComponent implements TableModelListener, Scrollable,
...
public void tableChanged(TableModelEvent e) {
...
int modelColumn = e.getColumn();
int start = e.getFirstRow();
int end = e.getLastRow();
Rectangle dirtyRegion;
if (modelColumn == TableModelEvent.ALL_COLUMNS) {
// 1 or more rows changed
dirtyRegion = new Rectangle(0, start * getRowHeight(),
getColumnModel().getTotalColumnWidth(), 0);
}
else {
// A cell or column of cells has changed.
// Unlike the rest of the methods in the JTable, the TableModelEvent
// uses the coordinate system of the model instead of the view.
// This is the only place in the JTable where this "reverse mapping"
// is used.
int column = convertColumnIndexToView(modelColumn);
dirtyRegion = getCellRect(start, column, false);
}
I see that in order to calculate dirty region, it converts column index, but does not do the same for row.
What does "reverse mapping" comment mean?
Looks like a bug in Swing to me.
What do you think?
UPDATE
My code is simple:
model.fireTableChanged(new TableModelEvent(model, rowNumber, rowNumber, columnNumber));
GUI does NOT refresh the cell.
UPDATE2
The issue is in my model which is too complicated to post it here. :(
I cannot blame JTable. It is designed this way. The only possible addition to it is RowSorter, and in there it does correct conversion:
private void repaintSortedRows(ModelChange change) {
...
int modelIndex = change.startModelIndex;
while (modelIndex <= change.endModelIndex) {
int viewIndex = convertRowIndexToView(modelIndex++);
if (viewIndex != -1) {
Rectangle dirty = getCellRect(viewIndex, columnViewIndex,
false);
int x = dirty.x;
int w = dirty.width;
if (eventColumn == TableModelEvent.ALL_COLUMNS) {
x = 0;
w = getWidth();
}
repaint(x, dirty.y, w, dirty.height);
}
}
}
Thanks everybody. Sorry for disturbance.
My code is simple:
model.fireTableChanged(new TableModelEvent(model, rowNumber, rowNumber, columnNumber));
That is not how you change data in a JTable. You should NOT be invoking that method directly. It is the responsibility of the TableModel to invoke that method when data is changed.
The point of using a TableModelListener is to listen for changes in the TableModel. You only need to implement the listener if you want to do special processing AFTER the data has changed as I demonstrated in the link I provided in my comment.
If you have data in an existing cell and you want to change its value then can do something like:
model.setValueAt("new value", 0, 0);
If you want to add a new row of data you use:
model.addRow(...);
The point is all changes should be done via the TableModel.
Note the JTable also has a convenience setValueAt(...) method which will invoke the model for you.
is there anyway to show textarea (for inserting custom text) instead of tooltips on clicking of the data points on the chart serie in gwt highcharts, or it can be only shown the tooltips on the chart, not outside the chart?
chart.setSeriesPlotOptions(new SeriesPlotOptions().setPointClickEventHandler(new PointClickEventHandler() {
#Override
public boolean onClick(final PointClickEvent pointClickEvent) {
Point[] points = chart.getSelectedPoints();
int posX = pointClickEvent.getScreenX();
int posY = pointClickEvent.getScreenY();
return true;
}
}));
i can't understand how to set position for the textarea, any suggestions?
EDIT:
Anyone already used annotations or similar with Java in highcharts gwt?
i'm using jfreechart, and i need to add labels to my series data. There are bold dots on graphic and they need labels... Following code does not work.
XYSeries series = new XYSeries("Average Size");
series.add(.60, .70);
XYDataset xyDataset = new XYSeriesCollection(series);
XYItemRenderer rend = new XYShapeRenderer();
XYItemLabelGenerator generator = new XYItemLabelGenerator() {
#Override
public String generateLabel(XYDataset xyd, int i, int i1) {
return "Some label?";
}
};
//SeriesItemLabelGenerator
rend.setBaseItemLabelGenerator(generator);
rend.setBaseItemLabelsVisible(true);
ItemLabelPosition pos = new ItemLabelPosition(ItemLabelAnchor.CENTER, TextAnchor.TOP_LEFT);
rend.setBasePositiveItemLabelPosition(pos);
I think the problem is that XYShapeRenderer(http://www.jfree.org/jfreechart/api/javadoc/src-html/org/jfree/chart/renderer/xy/XYShapeRenderer.html), which extends AbstractXYItemRenderer, does not implement ItemLabelGenerator logic yet.
So, or you will need to use another Renderer.
For example, XYLineAndShapeRenderer(http://www.jfree.org/jfreechart/api/javadoc/src-html/org/jfree/chart/renderer/xy/XYLineAndShapeRenderer.html) implements it:
// draw the item label if there is one...
if (isItemLabelVisible(series, item)) {
drawItemLabel(g2, orientation, dataset, series, item, xx, yy,(y1 < 0.0));
}
Or you will need to extend XYShapeRenderer yourself and add the label drawing logic, using any of the other Renderer's source code as an example.
I want to add colours to the edges of the graph which I created using the JUNG library. I have edges which are in the type of custom edges where I set the labels and weights to the edges.
Transformer<CustomEdge, Paint> edgesPaint = new Transformer<CustomEdge, Paint>() {
private final Color[] palette = {Color.GREEN,
Color.YELLOW, Color.RED};
public Paint transform(CustomEdge edgeValue) {
String stringvalue=edgeValue.toString();
stringvalue=stringvalue.replaceAll("%","");
int value=Integer.valueOf(stringvalue);
if (value<= 10) {
return palette[0];
}
if (value> 10 && value<=20 ) {
return palette[1];
}
else {
return palette[2];
}
}
};
The following line returns an error message saying that the type of the edgesPaint should be (string,Paint):
visualizationViewer.getRenderContext().setEdgeFillPaintTransformer(edgesPaint);
Please help me with this.
Offhand I'd guess that your VisualizationViewer was declared to have edge type "String" (i.e., VisualizationViewer. But without more context it's hard to be sure.
Please print the exact error message and stack trace. Showing the declaration of the VisualizationViewer would also probably be helpful.
I have a JFreeChart instance that displays process memory status, initialized as follows:
m_data = new TimeSeriesCollection();
TimeSeries vmsize = new TimeSeries("VMSize");
TimeSeries resident = new TimeSeries("Resisdent");
TimeSeries shared = new TimeSeries("Shared memory");
TimeSeries code = new TimeSeries("Code");
TimeSeries data = new TimeSeries("Data");
m_data.addSeries(vmsize);
m_data.addSeries(resident);
m_data.addSeries(shared);
m_data.addSeries(code);
m_data.addSeries(data);
JFreeChart chart = ChartFactory.createTimeSeriesChart("Memory usage", "Time", "Size", m_data, true, true, false);
m_chart = new ChartPanel(chart);
Later I add values to each TimeSeries in the TimeSeriesCollection. I would like to somehow know - when the user clicks on the Chart - either what time associated with that columm, or even better - what is the index of the value.
I looked at the JFreeChart and ChartMouseListener classes, but I could not figure out how to do that (also the documentation of JFreeChart is annoyingly scarce, I guess they are trying to get people to buy their developer's guide).
if you click dead on the item, the event.getEntity() function returns XYItem and then from there onwards
XYItemEntity xyitem=(XYItemEntity) event.getEntity(); // get clicked entity
XYDataset dataset = (XYDataset)xyitem.getDataset(); // get data set
System.out.println(xyitem.getItem()+" item of "+xyitem.getSeriesIndex()+"series");
System.out.println(dataset.getXValue(xyitem.getSeriesIndex(), xyitem.getItem()));
System.out.println(dataset.getYValue(xyitem.getSeriesIndex(), xyitem.getItem()));
Comparable comparable=dataset.getSeriesKey(0);
XYPlot xyplot = (XYPlot) event.getChart().getPlot();
System.out.println(xyplot.getRangeCrosshairValue());
however incase you do not click on the item itself but your crosshair is set to auto lock on data, in such case the crosshair will move to nearest item but since the item has not been clicked, you will not be able to get the XYItem and hence you cannot know the series and item index, to solve this problem there is this code below, it should be put in the catch clause while the above mentioned code should be in try clause
first define a function which will take crosshair value at domain and range and also Xydataset, this functions returns an inner class object that groups item index and series index
public static SeriesAndItemIndex getItemIndex(double domainVal,double rangeVal,XYDataset xydataset){
Comparable comparable;
int indexOf;
for(int i=0;i<xydataset.getSeriesCount();i++){
comparable = xydataset.getSeriesKey(i);
indexOf=xydataset.indexOf(comparable);
for(int j=0 ; j<xydataset.getItemCount(indexOf);j++){
double x=xydataset.getXValue(indexOf, j);
double y=xydataset.getYValue(indexOf, j);
if(x == domainVal && y==rangeVal){
return new SeriesAndItemIndex(j,indexOf);//return item index and series index
}
}
}
return null;
}
private static class SeriesAndItemIndex{ ///inner CLASS to group series and item clicked index
public int itemIndex;
public int seriesIndex;
public SeriesAndItemIndex(int i,int s){
itemIndex=i;
seriesIndex=s;
}
#Override
public String toString(){
return "itemIndex="+itemIndex+",seriesIndex="+seriesIndex;
}
}
how to use it?
try{......code block from the top
}catch(Exception e){
Object source=event.getSource();
JFreeChart chartpanel=(JFreeChart)source;
XYPlot xyplot = (XYPlot) chartpanel.getPlot();
XYDataset xydataset= xyplot.getDataset();
double d=xyplot.getDomainCrosshairValue(); //get crosshair X value
double r =xyplot.getRangeCrosshairValue(); //get crosshair y value
SeriesAndItemIndex index=getItemIndex(d,r,xydataset);
if(index != null){
System.out.println(index.toString());
}
}
hmm should work, if you replace the last two lines by something like this:
ChartPanel panel=new ChartPanel(ChartFactory.createTimeSeriesChart("Memory usage", "Time", "Size", m_data, true, true, false)));
panel.addChartMouseListener(new ChartMouseListener(){
void chartMouseClicked(ChartMouseEvent e){
[...do something on click...]
}
void chartMouseMoved(ChartMouseEvent e){
[...do something on move...]
}
});
return panel;