Touch Handler Deactivation

Question

I have to activate/deactivate some of my touch handlers.

Deactivation does only work, if I set the property OnXYZ to null. Setting the property Enabled to false is not sufficient.

Answer 1

Hello,

setting the propertty Enabled to false is sufficient. We use this approach very often and it works as expected. 

However, if the affected touch handler is actually involved in a user interaction (the user is touching the handler's area), the handler will continue receiving the events until the user finalizes the interaction - even if you disable the handler after the user has touched it. Please see the explanation in the section Disable a Simple Touch Handler.

If this is the problem in your application, I would suggest to add following code at the begin of the affected OnXYZ slot methods:

if ( !Touch_Handler.Enabled )
  return;

Best regards

Paul Banach

Comments

Hello,

now I have a similiar probelm when activating an SimpleTouchHandler. There are 4 Touch Handler on the same page, which are treated identical. 3 of these 4 handlers work as expected. The fourth handler works only, if I close the page and open it again.

The effect can only be seen on the real hardware, in the prototyper is is not.

I added the Enabled=true and the Setting of the OnSet handler at several places, but never the touch works on the first opening of the page.

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Ok, this was my error:

I have several pages, which I used to show making them visible, setting the attribute Visible true/false.

Obviously this is not sufficient. It seems, that there are some invisible objects in the forground, which block the touch handler of a visible made page. Though, it's not really clear, why this behaviour is different, when I make the page visible for the second time.

If I call RestackTop() after making the page visible, all touch handlers work as expected, also for the first call of the page.

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Hello,

maybe this section Simple Touch Handler and invisible components answers your question.

Best regards

Paul Banach