Hi Curtis, I was actually trying to either find a data structure that held all the input fields or create one myself. If I used the method you described below of calling getData() and then getType() and then parsing that, I have to iterate through all the fields for each field in the data file. From the looks of setMaps(), it seems as if the structure "dr[]" that holds Data objects is local to setMaps() and I can't access that from VisadAPI.java when iterating through the array. Do you know if there is a similar global structure? Also, is there a method in BasicSSCell called parse() because I'm not sure how you would parse() a MathType. Since I'm not sure if there is such a global structure, I'm iterating through the Scalar[] array in MappingDialog.java of String names corresponding to input fields and then constructing the RealType from the string name. The reason is that when I "evolve()" the current generation of cells, I'm changing what each field (or "gene") gets mapped to. So I have to iterate through the structure holding the fields to re-assign them after each generation in order to display the new mappings. In the VisadAPI.java attachment, in setCellMapping(width, height), I go through the array of strings called "Scalars[]" which is declared in MappingDialog and my function getScalars() in MappingDialog.java just returns it. I also declared the local variable "mapDialog" in addMapDialog() to be a public class variable in FancySSCell.java so I can access the Scalars array from VisadAPI.java. When I implement the functionality for selecting multiple cells, I'm not going to adjust the rest of the spreadsheet to accomodate this. ie. I'm not going to worry about the formula bar, or the checkbox, or the cut, paste, copy buttons even though they should be changed. I merely want the user to be able to select multiple cells so that these preferred cells can "live" to the next generation. I just need some way of knowing which cells the user likes best and then to feed those particular mappings or cell #'s into my evolution function (in another class). Knowing that, if I were to use the java Vector class to store the cells that are selected at the same time, would changing just the code around CurX, CurY variables make sense? Or do you know of other places that should be included? Thanks, Michelle (VisadAPI.java doesn't compile yet, but I attached it to show how I'm iterating through Scalars[] to see if you think it makes sense). Michelle Kam (408) 742-2881 Lockheed Martin Space Systems Co. SSM/ATC/MSIS B/153 O/L922 1111 Lockheed Martin Way, Sunnyvale, CA 94089 -----Original Message----- From: Curtis Rueden [mailto:curtis@xxxxxxxxxxxxx] Sent: Monday, June 23, 2003 2:54 PM To: Michelle Kam Subject: RE: specifying fields from input file Hi Michelle, >When I load a data file into a spreadsheet cell, the input fileds such as >latitude, longitude, etc are different per each file. Do you know which class >I can find those fields that appear in the left column of the mapping dialog >box called "Map From"? I'm looking for an array or some data structure that >holds those fields so that I can map each input field to a corresponding >Display type such as CylRadius that shows up in the "Map To" section of the >mapping dialoge box. MappingDialog extracts these ScalarTypes from the data's MathType. Call BasicSSCell.getData to get the Data object, then call getType on the Data, then parse the MathType it returns. MappingDialog does this with a collection of recursive algorithms, but if you know something about the structure of your MathType, you can probably make some assumptions to simplify the process. >I was trying to find a way to select multiple cells at once by pressing >"Control" and selecting the desired cells with the mouse button. Would you >recommend adding more fields in SpreadSheet.java like "CurX2" and "CurY2" to >represent the 2nd cell that was selected by the user? And then add a method >in SpreadSheet.java to handle 2 cells? You'll need a more general solution to do multiple selection. My first thought is to use a Vector to keep a list of which cells are currently selected. Then you'd have to rewrite all the code that affects the selected cell to instead go through that Vector and apply changes to all selected cells. This problem is much trickier than it appears at first, because you have to make some decisions about how things behave when multiple cells are selected. For example, you'd probably need to display "[Multiple cells selected]" or something in the formula bar when a multiple selection exists. If the dimensionalities of the selected cells do not match, you'd need to use a fuzzy gray checkbox in the cell menu to represent that fact. You'd need to arbitrarily pick a cell for adding new data when the user types something in the formula bar. You'd probably have to disable the Cut, Copy and Paste features when a multiple selection exists. Overall, multiple selection support represents significant work, with little to no added functionality or convenience, which is why I never added it. >And when I set up my array holding all the possible "Map To" fields that >show up in the mapping dialog when you run the program, I counted 44 >different fields in the "Map To" section but in MappingDialog.java, there >are 50 different entries for MapNames[][] and MapTypes[][]. Why don't the 6 >extra fields like "Hue" and "Saturation" appear in the dialog box? Hue and Saturation actually *do* appear in the MappingDialog. They are labeled "H" and "S", respectively. However, there are six types that are not represented in that graphic. These are types that were added to VisAD after I designed the MappingDialog graphic, and thus they are not included. Actually, I did redesign the graphic once to incorporate some new types we added, but those latest six were added after the first redesign. -Curtis
Attachment:
VisadAPI.java
Description: Binary data
//changed the variable: "mapDialog" from a local variable to a public class variable so getMapsFrom() in //MappingDialog.java can be accessed public MappingDialog mapDialog;
//around line 920, public accesor method to get private "maps from" array
/*
*Gets the "map from" array
*/
public String[] getMapsFrom() {
return Scalars;
}
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