MATLAB Creating Graphical User Interfaces

14 Examples of UIs Created Programmatically

Likewise, specifying the figure handle to findobj assures that only one list box handle

is returned, regardless of how many List Master instances are open at the same time.

List Master Utility Functions

Certain callbacks rely on four small utility functions that are listed and described in this

table.

Utility Function How Used

number_list Called to generate line numbers whenever a list

updates and line numbering is on

guidirty Sets the Boolean dirty flag in the figure's application

data to true or false to indicate difference from saved

version

isguidirty Returns logical state of the figure's dirty flag

make_list_output_name Converts the name of a list (obtained from the figure

Name property) into a valid MATLAB identifier, which

serves as a default when saving the UI or exporting its

data

List numbering works by adding five spaces before each list entry, then substituting

numerals for characters 3, 2, and 1 of these blanks (as needed to display the digits) and

placing a period in character 4. The numbers are stripped off the copy of the current

item that displays in the text edit box, and then prepended again when the edit is

committed (if the Number list check box is selected). This limits the size of lists that

can be numbered to 999 items. You can modify number_list to add characters to the

number field if you want the UI to number lists longer than that.

Note:You should turn off the numbering feature before importing list data if the items

on that list are already numbered. In such cases, the item numbers display in the list,

but moving list items up or down in the list does not renumber them.

The guidirty function sets the figure's application data using setappdata to indicate

that it has been modified, as follows:

function guidirty(fh,yes_no)

% Sets the "Dirty" flag of the figure to true or false