hello
i am currently developing a line/image plotting application for radar analysis
using visad...i am relatively new to the package, but thus far i have been
quite pleased...here is my problem:
basically i want to allow the user change various properties of each line that
is currently displayed in the plot...i have created my own java widgets for
this and they control color, width, and style...i add each data set to the
display like this (the data is added with default display properties to be
changed later by the user):
dataRef = new DataReferenceImpl("dataRef"); // dataRef is local
dataRef.setData(field); // 'field' (local) is populated with data from a text
file
ConstantMap[] lineCMap = {
new ConstantMap(redVal, Display.Red),
new ConstantMap(greenVal, Display.Green),
new ConstantMap(blueVal, Display.Blue),
new ConstantMap(GraphicsModeControl.SOLID_STYLE, Display.LineStyle),
new ConstantMap(1.0f, Display.LineWidth) };
_display.addReference(dataRef, lineCMap); // '_display' is a member of my
plotter class
i am not storing the data references anywhere else in the class...in theory, i
thought i could grab the data reference i need from the _display, change the
constant maps (according to user-specified values), and pass it back to the
display...here is some pseudo-code:
void listener() {
// get appropriate data reference from _display
// create new constant maps with user-specified values
// swap out the old data reference (and old constant maps) with new
data reference (and new constant maps)
}
the other idea was maybe to replace the constant maps for the requested data
reference...is this possible?...i cannot seem to figure out how to do this...i
have read documentation everywhere and looked at many examples...
many thanks in advance for any help!
jc
