Double Click Event Puzzle

[viSci]

I have an Touchscreen HMI that will popup a keypad when a numeric control is double clicked. The problem is that I also want to allow

a user to single click the inc/dec arrows with the mouse if it is present. If the single clicks are fast enough they register as an unwanted double click event.

I have a single registered mouse down and value changed event for all of the control references in my HMI so I need a generic solution to differentiate between a value change event and a double

click. So far I have not been successful. Is it possible within the value change event to disable the double click event or throw away a mouse click?

[LAVA 1.0 Content]

QUOTE (sachsm @ Feb 26 2009, 10:23 PM)

I have a single registered mouse down and value changed event for all of the control references in my HMI so I need a generic solution to differentiate between a value change event and a double click. So far I have not been successful. Is it possible within the value change event to disable the double click event or throw away a mouse click?

You could look for the 'Mouse Down?' event, one of the left hand terminals has the value 'Double Click', if this is true, discard the event.

This might (might) the actual Double click (I seriously don't know), otherwise I think the same terminal is available in the 'Mouse Down' event.

Ton

[viSci]

Here is my solution so far... I have to perform the double click detection myself and interfere with the description property.

[LAVA 1.0 Content]

Àny reason not to use the native Double Click detection:

Ton

[viSci]

Hi Ton,

Perhaps I am not understanding how simple the solution is but I cannot see how to use the native double click to produce the desired result.

Take a closer look at my example and notice that it is able to differentiate, on a single numeric control, between a double click and two fast successive value changes.

[LAVA 1.0 Content]

Hi,

I used auto-clean up to trim down the size of the screenshot, unfortunatly the title of the event was truncated.

The screenshot I showed was for the 'Mouse Down' event. This event has a mod.doubleclick terminal to indicate whether the mouse down was part of a double click. All provided by the OS, I am not sure if the HMI module has this possibility.

Ton

[viSci]

Ok, I will try again to explain...If I double click on the text field of the control I want a popup touchscreen keypad to appear. If I click twice rapidly on the up arrow of the control then I do not want to have the keypad popup, but unfortunately the Mods:Double Click property cannot tell the difference by itself. BTW, thanks for your interest in trying to help.

[Michael Aivaliotis]

QUOTE (sachsm @ Mar 1 2009, 09:54 AM)

Take a closer look at my example and notice that it is able to differentiate, on a single numeric control, between a double click and two fast successive value changes.

If it works then what's the problem?

[viSci]

Cool...I never knew you could get that kind of detailed coordinate information, thanks. I prefer your solution since it does not rely on

having to use up the description property of the controls.

[huotom]

QUOTE (Ton @ Feb 28 2009, 03:46 PM)

Àny reason not to use the native Double Click detection:

http://lavag.org/old_files/monthly_02_2009/post-2399-1235807145.png' target="_blank">

Ton

I think this is the best and simple solution.

Using "mouse down" event + case structure , we can handle single click and / or double click separately.