callback in TreeNode Propertis

hi, i want to execute calback by click Node2 to execute other function

It's possibile to do it?

[Josh]

Please provide the MATLAB version you are using.

[Luca Re]

>> version

ans =

'24.1.0.2603908 (R2024a) Update 3'

Answer 1

[Tejas]

Hello Luca,

Follow the example below to add a callback to a node within a Tree:

• Define a callback for the Tree using the ‘SelectionChangedFcn’ property. This property of the Tree component specifies the callback function to execute when the selection changes.

tree.SelectionChangedFcn = @(src, event) nodeSelectionCallback(src, event, node2);

• Below is an example of the callback code, which checks if node 2 has been selected and, if so, calls another function.

function nodeSelectionCallback(src, event, targetNode)
    selectedNode = event.SelectedNodes;

    % Check if second node is selected
    if isequal(selectedNode, targetNode)
        disp('Node 2 has been selected ');
        myCustomFunction(); % The other function
    end
end

For more details, kindly refer to the documentation below:https://www.mathworks.com/help/matlab/ref/matlab.ui.container.tree-properties.html .

[Luca Re]

it give me an error

[Tejas]

Hello Luca,

The method I previously shared is for assigning a callback to a Tree node when it is created in a .M file. While using App Designer, follow these steps to assign a callback to a node:

• Navigate to Code View, then to Code Browser. Click on the plus icon and add a 'SelectionChangedFcn' callback, as illustrated in the screenshot below.

• Edit the code within the 'TreeSelectionChanged' function as follows.

% Selection changed function: Tree
function TreeSelectionChanged(app, event)
    selectedNodes = app.Tree.SelectedNodes;
    if strcmp(selectedNodes.Text,'Node2')
        disp('Node2 two has been selected ');
        myCustomFunction(); % Call the other function
    end
end

• Ensure that 'myCustomFunction' is a .M file and is present on the MATLAB path.

[Luca Re]

thank you