https://github.com/jrincayc/ucblogo-code
Tip revision: ca23b30a62eaaf03ea203ae71d00dc45a046514e authored by Dan Malec on 21 January 2024, 20:20:12 UTC
Merge pull request #178 from jrincayc/issue_176_alt
Merge pull request #178 from jrincayc/issue_176_alt
Tip revision: ca23b30
buttonact
BUTTONACT (variable)
if nonempty, should be an instruction list that will be evaluated
whenever a mouse button is pressed. Note that the user may have
released the button before the instructions are evaluated. BUTTON
will still output which button was most recently pressed. CLICKPOS
will output the position of the mouse cursor at the moment the
button was pressed; this may be different from MOUSEPOS if the
user moves the mouse after clicking.
Note that it's possible for the user to press a button during the
evaluation of the instruction list. If this would confuse your
program, prevent it by temporarily setting BUTTONACT to the empty
list. One easy way to do that is the following:
make "buttonact [button.action]
to button.action [:buttonact []]
... ; whatever you want the button to do
end