Plot-type selection components

% Present the PlotCombo control
import com.mathworks.mlwidgets.graphics.*
jPlotCombo = PlotTypeCombo;
pos = [100,100,170,50];
[jhPlotCombo,hPanel] = javacomponent(jPlotCombo,pos,gcf);
set(jhPlotCombo,'ActionPerformedCallback',@myCBFcn);
% Callback function to process PlotCombo selections
function myCBFcn(jObject,jEventData)
   newPlotFunc = jObject.getSelectedItem.getName.char;
   %Now do something useful with the selected function
end  % myCBFcn

com.mathworks.mlwidgets.graphics.PlotCatalog.getInstance.show

% Add the specified plotFunc to a PlotTypeCombo control
function updatePlotCombo(plotCombo, plotFunc)
   % Convert plotFunc (a Matlab string) into a Java PlotSignature
   import com.mathworks.mlwidgets.graphics.*
   plotSig = PlotMetadata.getPlotSignature(plotFunc);
   % Get the list of all existing plot types in the combo box
   existingPlotTypes = {};
   for plotIdx = 0 : plotCombo.ItemCount-1
      nextItem = plotCombo.getItemAt(plotIdx);
      if isjava(nextItem)
         nextItem = char(nextItem.getName);
      end
      existingPlotTypes = [existingPlotTypes, nextItem];
   end
   % If the new plotType is NOT already in the list
   if isempty(strmatch(plotType,existingPlotTypes,'exact'))
      % Add the new plotType to the list just prior to the end,
      % so that "More plots..." will always be last
      plotCombo.insertItemAt(plotSig,plotCombo.ItemCount-1);
   end
   % Set the currently-selected item to be the requested plotType
   % Note: temporarily disable callbacks to prevent involuntary action
   plotCombo.ActionPerformedCallback = [];
   plotCombo.setSelectedItem(plotSig);
   plotCombo.ActionPerformedCallback = @myCBFcn;  % selection callback
end  % updatePlotCombo

updatePlotCombo(jhPlotCombo,'stairs');

>> com.mathworks.mlwidgets.graphics.PlotMetadata.listAllSignatures
ans =
[area, bar, bar (stacked), barh (stacked), barh, comet, compass, errorbar,
 feather, loglog, plot, plot N series, plot N series against T, plot3, plotmatrix, plotyy,
 polar, quiver, quiver3, ribbon, scatter, scatter3, semilogx, semilogy,
 stairs, stem, stem3, null, contour, contour3, contourf, image,
 imagesc, mesh, meshc, meshz, pcolor, plot against first column, surf, surfc,
 surfl, waterfall, null, contour, contour3, contourf, image, imagesc,
 mesh, meshc, meshz, pcolor, plot against first column, surf, surfc, surfl, waterfall]
>> plotFunc = 'surf';  % for example
>> plotSig = PlotMetadata.getPlotSignature(plotFunc);
>> args = cell(plotSig.getArgs)';
args =
    [1x1 com.mathworks.mlwidgets.graphics.PlotArgDescriptor]
    [1x1 com.mathworks.mlwidgets.graphics.PlotArgDescriptor]
    [1x1 com.mathworks.mlwidgets.graphics.PlotArgDescriptor]
    [1x1 com.mathworks.mlwidgets.graphics.PlotArgDescriptor]
>> argsStruct = [];  % initialize
>> for argsIdx = 1 : length(args)
      argsStruct(argsIdx).axis = char(args{argsIdx}.getAxis);
      argsStruct(argsIdx).name = char(args{argsIdx}.getName);
      argsStruct(argsIdx).label = char(args{argsIdx}.getLabel);
      argsStruct(argsIdx).dims = args{argsIdx}.getNumDimensions;
      argsStruct(argsIdx).reqObj = args{argsIdx}.getRequired;
      req = argsStruct(argsIdx).reqObj;
      argsStruct(argsIdx).requiredFlag = req.equals(req.REQUIRED);
   end
>> disp(argsStruct(1))			% Info about the first input argument
            axis: 'X'
            name: 'X'
           label: 'X Data Source'
            dims: [2x1 int32]
          reqObj: [1x1 com.mathworks.mlwidgets.graphics.PlotArgDescriptor$RequiredType]
    requiredFlag: 0
>> disp({argsStruct.axis})		% axis info of all input arguments
    'X'    'Y'    'Z'    ''
>> disp({argsStruct.name})		% name of all input arguments
    'X'    'Y'    'Z'    'C'
>> disp({argsStruct.label})	% data label of all input arguments
    'X Data Source'    'Y Data Source'    'Z Data Source'    'Color'
>> disp({argsStruct.dims})		% dimensionality of all input args
    [2x1 int32]    [2x1 int32]    [2]    [2]
>> disp({argsStruct.requiredFlag})	% is any input arg mandatory?
    [0]    [0]    [1]    [0]