OpenEuphoria

Re: LeftDoubleClick and LeftClick

• Posted by Derek Parnell <ddparnell at bigpond.com> Apr 08, 2001
• 438 views

Judith wrote:
> If the user has multiple control drop selected and leftdoubleclicks, the
> last control selected is droped onto the Design Form and THEN the
> leftdoubleclick routine takes action. What is happening is that the
> leftclick routine takes action before Win32lib detects the second click.
> I've changed my mouse click speed to no avail. If the user has multiple
> control drop unselected, there is no problem, so the situation is an
> isolated one. I can warn the user in the IDE docs but would rather find
> a programatical solution.

Hi Judith,
the left click will always fire before a double-click. It has to, if you
think about it. The button-down/button-up combination is a click. To have a
double click you must have a single click first. To get over the problem,
either change the IDE so that a single click can always be allowed before a
double click. However if that is not possible, you might have to delay the
single click behaviour. You have to detect the single click, then wait for
the double-click period and if a double click is not detected execute the
single click behaviour. Rather messy and the user might wonder why a delay
occurs when they single click.

I think that convention in Windows is that a single click SELECTS and a
double click ACTS. If instead, an application uses single click to ACT, then
a double click is ignored. Try double clicking on a normal button - only the
first click is used, the second is ignored.  In a text editor or word
processor the first click will select the window (give focus to it) and the
second click (in a double) will act on what ever is under the cursor.

------
Derek Parnell
Melbourne, Australia
"To finish a job quickly, go slower."