Show listed images in Panel when a node is clicked in UITree Matlab?

Question

I am working in Matlab. I want to show Images in a given Panel one by one when user mouse click on a file name in tree list. Can anyone please help me?

Code for tree:

src = strcat(pwd,'\Result\');
[mtree, container] = uitree('v0', 'Root',src,۔۔۔
'Position',[10 10 290 370],'Parent', imageListPanel2); % Parent is ignored
 set(container, 'Parent', imageListPanel2);  % fix the uitree Parent

Function to Display Image in panel:

function refreshDisplay(varargin)
    imgDisplayed = imshow(tmp,'parent',workingAx);
end %refreshDisplay

I just need to know how to call function refreshDisplay() from my tree. Again remember I want to call function from Tree Elements(files) not from node(sub directory).

Regards.

Answer 1

Note that everything in the tree are nodes, both the folders and the images. You need to implement a check inside the selection callback to test whether the selected node is a folder.

Quoting UndocumentedMatlab:

The currently-selected node(s) can be accessed using mtree.getSelectedNodes. Node selection callbacks often require knowledge of the currently selected rows:

%// Tree set up
mtree = uitree(..., 'SelectionChangeFcn',@mySelectFcn);
set(mtree, 'SelectionChangeFcn',@mySelectFcn); % an alternative

%// The tree-node selection callback
function nodes = mySelectFcn(tree, value)
    selectedNodes = tree.getSelectedNodes;
    %// Use this to see which information is available about the node:
    %//   methods(selectedNodes(1),'-full')
    %// And the node array:
    %//   methods(selectedNodes,'-full')
    if ~isempty(selectedNodes) || max(selectedNodes.size)>1
       %// Obtain path from selected node; Source: link1 below
       nodePath = selectedNodes(1).getPath.cell;
       subPathStrs = cellfun(@(p) [p.getName.char,filesep],nodePath,'un',0);
       pathStr = strrep([subPathStrs{:}], [filesep,filesep],filesep);
       %// Also, don't forget a drive letter here ^ if required
        if ~isdir(pathStr) %// check that the selection isn't a directory
            %// this is where you need to call your refresh function
        end
    end
end  %// mySelectFcn

link1

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You can get some other ideas in this answer, which shows how to implement a mouse tracking callback, in case you want the refresh to execute on a mouse-over...