MATLAB how to detect double click on tree node - matlab

Question

I have the MATLAB code which deals with a uitree structure. I want to detect when the user double clicks a node, now I managed to make it work only on node click :(
% 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
How do I make the callback be called on mouse double click? Now it works only on mouse node select click :(

Answer 1

I found the solution by own experimenting :
% 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