How do I make multiple selections for window query events when I apply a child table?

How do I make multi-selection of window query events when I select a Sub-table window event?

In fact, do some transformation can achieve the effect OH

Modify the sheettextbox.js listmastercallback function to change the value of the set control to the following way

Detects whether a primary key field is already present in the child table data, if it does not exist, calls the new row method of the child table, writes the data of the selected row of the window to the new child table row, and updates the row if a primary key field value is detected to exist in the child table;

Listmastercallback Remove the automatic closing of the form code so that you can still continue to double-click;

How do I make multiple selections for window query events when I apply a child table?