User's Guide
Desktop
Xdialog
Reading Variables in External Modeless Xdialogs

Reading Variables in External Modeless Xdialogs

Description

This example shows how a variable in another modeless Xdialog can be read using the UI_DLG_EVAL()and UI_DLG_EVAL_VALID() functions. First, display the "test" modeless dialog box with a variable.

x=1
ui_modeless_dlg_box("Test",<<%dlg%
X: [.20x] ;
{lf};
;
%dlg%,<<%code%
if a_dlg_button = "increment" then
    x = x + 1
    a_dlg_button = ""
end if
if a_dlg_button = "close" then
    ui_modeless_dlg_close("test")
end if
%code%)

Then, create the "Read Value" modeless dialog that will read the value of x in the "test" dialog.

dim dlg_title2 as c
dlg_title2 = "Read Value in External Modeless Dialog"
ui_modeless_dlg_box(dlg_title2,<<%dlg
This example shows how a variable in another modeless Xdialog can be read using the ui_dlg_eval\() function.;
;
{lf};
;
%dlg%,<<%code%

Test to see if the variable x exists in the "test" dialog.

if a_dlg_button = "read" then
    if ui_dlg_eval_valid("test","x") then

If it does exist, use UI_DLG_EVAL()to read it and display it in a message box.

ui_msg_box("Value of X","" + ui_dlg_eval("test","x"))
    else
        ui_msg_box("Error","Dialog 'Test' is not open.")
    end if
    a_dlg_button = ""
end if
if a_dlg_button = "close" then
    ui_modeless_dlg_close(dlg_title2)
end if
%code%)

Move the "Read Value" dialog so it does not hide the "Test" dialog..

ui_dlg_move(dlg_title2, 0, 0)

Limitations

Desktop applications only