callback in TreeNode Propertis
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Tejas
2024-8-16
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 .
3 个评论
shamal
2024-8-16
it give me an error
Tejas
2024-8-16
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.
shamal
2024-8-16
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