Notify of click and release on an icon?

I posted this on the newsgroups, but in case people don’t read them, I’m posting here too.

Is there any way to be notified when a user has both clicked on, and then released an icon? It’s possible to set the button type to be notified of a click (button type 3), or to be notified of a release (button type 4), but it doesn’t seem possible to be notified of both. The auto-repeat button type (2) isn’t helpful here, as it’s not possible to tell (from the notification) if the button is being held down, or repeatedly clicked. Effectively it’s a combination of button types 3 & 4 I’m looking for.

I’ve currently implemented it by setting the button type to ‘Click’ and then checking the mouse on null polls (Wimp_GetPointerInfo) after a click, to see when the mouse button is released, but I wondered if there’s an easier/more obvious way that I’ve missed? I’m doing this in BASIC.

I had a similar issue. I had a grid of icons where I wished one to be selected and held, while dragged to one or more icons and update accordingly. I think I used button type 1 for continuous update and then something like

    2840 : DEFPROCgetmouseinfo

    2850 :   oldmousex%=mousex%

    2860 :   oldmousey%=mousey%

    2870 :   oldmouseb%=mouseb%

    2880 :   SYS"Wimp_GetPointerInfo",,workspace%

    2890 :   mousex%=workspace%!0

    2900 :   mousey%=workspace%!4

    2910 :   mouseb%=workspace%!8

    2920 :   workspace%!0=main%

    2930 :   SYS"Wimp_GetWindowState",,workspace%

    2940 :   mousex%-=workspace%!4

    2950 :   mousey%-=workspace%!8

    2960 :   mousex%=(60+mousex%)/64

    2970 :   mousey%=(706-mousey%)/64

    2980 :   IF (oldmousex%<>mousex% OR oldmousey%<>mousey%) AND selecton% PROCdragon

    2990 :   IF oldmouseb%<>mouseb%  PROCmousebuttons

    3000 : ENDPROC

    3010 : 

    3020 : DEFPROCmousebuttons

    3030 :   IFmouseb%=1ANDoldmouseb%=0THENPROCadjuston

    3040 :   IFmouseb%=4ANDoldmouseb%=0THENPROCselecton

    3050 :   IFmouseb%=0ANDoldmouseb%>0THENPROCselectoff

    3060 : 

    3070 : ENDPROC

 

Thanks. I used button type 3, looked for a click and then watched the mouse buttons to see when it was released. I could have done it similar to your way too, I guess.

I wonder if there’s scope for a “Notify of click (x1), release (x16)” or similar button type to be added. I note there are two “Reserved” button types, 12 & 13. Could one of those be used?

Isn’t it easiest to start an invisible drag on the click and then you’ll get a drag message when the pointer is released?

Wouldn’t that rely on the button being held down for longer than the configured WimpDragDelay in order to initiate a drag?