TreeListBase.beginUpdate

Syntax

beginUpdate();

Description

The beginUpdate method selects update block checkbox.

Comments

The method adds a one to the update block checkbox. The update is executed if the block checkbox is equal to 0. To deselect the checkbox, use the TreeListBase.endUpdate method.

Example

Executing the example requires the SimpleTreeList component with the Tree identifier (see Example of Creating the SimpleTreeList Component).

// Pause tree update
Tree.beginUpdate();
// Create nodes
node7 = { Key: '7', Content: 'No7' };
node8 = { Key: '8', Content: 'No8' };
nodes = [node7, node8];
// Check update status
console.log(Tree.isUpdating()? "Updating" : "Update mode is disabled");
// Load new nodes
Tree.loadNodes(nodes);
// Refresh tree
Tree.endUpdate();

After executing the example the the added nodes are updated only after calling the TreeListBase.endUpdate method.