7.3.1 Mouse Exception Processing

ACUCOBOL-GT treats each of the possible mouse actions in a manner similar to a function key. Each action has a unique "key code" that allows you to define the desired behavior by using the KEYSTROKE configuration entry. The following table details the mouse action, the corresponding key code, and the default exception value returned.

Action
Key Code
Exception Value
Mouse moved

Mv
80
Left button pushed

Ml
81
Left button released

ML
82
Left button double-clicked

M1
83
Middle button pushed

Mm
84
Middle button released

MM
85
Middle button double-clicked

M2
86
Right button pushed

Mr
87
Right button released

MR
88
Right button double-clicked

M3
89

For example, if the user moves the mouse while your program is at an ACCEPT statement, then that ACCEPT statement will terminate with an exception value of "80". Note that this will occur only if the mouse action is "unmasked" and your ACCEPT statement allows for exception keys. If the mouse action is masked or if the ACCEPT statement does not allow for exception keys, then the mouse movement will be ignored.

Action	Key Code	Exception Value
Mouse moved	Mv	80
Left button pushed	Ml	81
Left button released	ML	82
Left button double-clicked	M1	83
Middle button pushed	Mm	84
Middle button released	MM	85
Middle button double-clicked	M2	86
Right button pushed	Mr	87
Right button released	MR	88
Right button double-clicked	M3	89