MATLAB: How to detect double click with mouse on a tree node

guiMATLAB

I have the code:
% Tree
function test()
    clc;
    set(groot,'Units','characters')
    figure('Position',[200,200,400,400]);
      root = uitreenode('v0', 'Datatypes', 'Datatypes', [], false);
      root.add(uitreenode('v0', 'Potato', 'Potato', [], true));
      root.add(uitreenode('v0', 'Tomato', 'Tomato', [], true));
      root.add(uitreenode('v0', 'Carrot', 'Carrot', [], true));
      [mtree,container] = uitree('v0', 'Root', root,'Position',[50,50,150,150],SelectionChangeFcn, @callback);
      uiwait(gcf,2);
      root2 = uitreenode('v0', 'Datatypes2', 'Datatypes2', [], false);
      root2.add(uitreenode('v0', 'Carrot2', 'Carrot2', [], true));
      root2.add(uitreenode('v0', 'Tomato2', 'Tomato2', [], true));
      mtree.setRoot(root2);
      %displ tthe root and its children
      root=mtree.getRoot();
      rootName = root.getName();
      for i=0:root.getChildCount()-1
          childNode = root.getChildAt(i);
          childName = childNode.getName();
          disp(childName);
      end
end
function callback(src, data)
    persistent x;
    if isempty(x)
        x=0;
    end
    x=x+1;
    disp([num2str(x) ' tree_Datatypes_Selection_Callback called']);
end
Is there any way to make a callback be called on tree node double click ? At the moment is called on mouse click , not double click 🙁

Best Answer

I found the trick after some hard work :
% Tree
function test()
    clc;
    global jtree;
    set(groot,'Units','characters')
    figure('Position',[200,200,400,400]);
      root = uitreenode('v0', 'Datatypes', 'Datatypes', [], false);
      root.add(uitreenode('v0', 'Potato', 'Potato', [], true));
      root.add(uitreenode('v0', 'Tomato', 'Tomato', [], true));
      root.add(uitreenode('v0', 'Carrot', 'Carrot', [], true));
      [mtree,container] = uitree('v0', 'Root', root,'Position',[50,50,150,150]);
      jtree = mtree.getTree;
      % MousePressedCallback is not supported by the uitree, but by jtree
      set(jtree, 'MousePressedCallback', @mousePressedCallback);
      uiwait(gcf,2);
      root2 = uitreenode('v0', 'Datatypes2', 'Datatypes2', [], false);
      root2.add(uitreenode('v0', 'Carrot2', 'Carrot2', [], true));
      root2.add(uitreenode('v0', 'Tomato2', 'Tomato2', [], true));
      mtree.setRoot(root2);
      %displ tthe root and its children
      root=mtree.getRoot();
      rootName = root.getName();
      for i=0:root.getChildCount()-1
          childNode = root.getChildAt(i);
          childName = childNode.getName();
          disp(childName);
      end
end
function mousePressedCallback(hTree, eventData) %,additionalVar)
  % if eventData.isMetaDown % right-click is like a Meta-button
  % if eventData.getClickCount==2 % how to detect double clicks
      persistent x;
      global jtree;
      if isempty(x)
          x=0;
      end
      x=x+1;
      clickX = eventData.getX;
      clickY = eventData.getY;
      treePath = jtree.getPathForLocation(clickX, clickY);
      if ~isempty(treePath)
          nr=eventData.getClickCount();
          disp([num2str(x) ': click count:' num2str(nr)]);
          % check if the checkbox was clicked
          node = treePath.getLastPathComponent;
          nodeValue = node.getValue;
      else
          disp('you clicked outside the tree')
      end
    end % function mousePressedCallback
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