Difference in the behaviour between button.click and label.click

Question

3.00/5 (2 votes)

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I found a difference in the Behaviour between the Click-Event from those both controls.
The Click-Event (or the OnClick-method) from the Button-Control is raised abot 2 times faster than the same Event (method) from the Label-Control (or Control).

Could anyone explain me why - or better what to do to achieve that both controls react in the same way ?

OK ... someone felt free to vote my question down (perhaps it is to simple to be asked) ... but no one is able to give an answer ... very good ...

What I have tried:

no idea in the moment ... :( ..

Posted 21-Aug-16 0:46am

Ralf Meier

Updated 21-Aug-16 21:20pm

v2

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Comments

OriginalGriff 21-Aug-16 7:19am

How are you testing it?
What kind of numbers are you getting?

Ralf Meier 21-Aug-16 8:58am

I found it out by coincidence.
I have self-created Button-Control, which derives from (Windows.Forms.)Control (I also tested the same with the deriving from Label or ButtonBase).
In my Application I work with the Events. Now I have a purpose which could have fast Button-pressings. Here my Button allows only severall Clicks. If I change the Inheritance (from my Control) to Button I could work with it like I want.
So ... from here comes my question. Nothing (in the code) changed except the Inheritance - but the Performance changes a lot ...

Karthik_Mahalingam 21-Aug-16 7:21am

Post your code

Ralf Meier 21-Aug-16 8:59am

see my reply to the comment from OG ...

Karthik_Mahalingam 21-Aug-16 11:54am

ok

Ralf Meier 21-Aug-16 8:59am

I think, you understood my question completly wrong. See my reply to the comment from OG ...

[no name] 21-Aug-16 9:39am

Have you compared the time between Click Event versus the Overridable OnClick method, within the derived class

Ralf Meier 21-Aug-16 14:49pm

No - I don't compared the time. I only compared the real reaction from my "Test-Application". So ... "2 times faster" could be a guess - in fact it could also be 1,5 times faster or 3 times faster - but there is a difference which I can't understand, because all those controls originally derive from Control ...

Maciej Los 21-Aug-16 14:02pm

Button-Control is raised abot 2 times faster than the same Event (method) from the Label-Control (or Control). - I believe this statement is untrue!

Ralf Meier 21-Aug-16 14:45pm

OK ... then create a Form, place a Button and a Label and a TextBox on it.
Now you make a method which toggles the Text from the Textbox.
Connect this Method to the Button.Click-Event ans also to the Label.Click-Event.
Now switch this to run and click fast on the Button and see how the Textbox-Content toggles and after this do the same with the Label ...
In my Test-Application (only for this) I could click the Button 2 times faster (to get a real result) than the Label ... My Test-Application does only this - nothing more ... and also with Standard-Windows-Controls ...

Maciej Los 21-Aug-16 15:36pm

No difference... a time of execution is the same.

Ralf Meier 21-Aug-16 15:40pm

Not for me ...
I use .Net-Framework 4.0
But if I believe you, Maciej - where is the difference ...?

[no name] 21-Aug-16 16:06pm

I can confirm your Observation. I'm just diving into c# reference implementation :)

[Edit]
Funny: Try with left/right mouse button on the label. Like this Label take abaout the same click rate like Button.

BTW: See comment in reference implementation:
// If not for FormatControl, we could inherit from ButtonBase and get foreground images for free.
public class Label : Control {

Ralf Meier 22-Aug-16 0:52am

see my reply to the comment from Alan N ...

But ... thank you for confirming my Problem. I allready began with doubt in myself ... :(

Ralf Meier 21-Aug-16 15:47pm

I tested it once more. Now with MouseClick instead of Click.
Same result - the Button accepts much more Clicks (and forced reactions) in the same time than a Label ...
But by the way : I don't spoke about the execution-time. I spoke about the real Click-reactions ...

Maciej Los 21-Aug-16 16:05pm

Time of click-reaction is still the same...

Ralf Meier 22-Aug-16 0:45am

see my reply to the comment from Alan N ...
So I don't understand why you got different results than I ... !?

Alan N 21-Aug-16 18:37pm

The effect may be something to do with double click detection which is enabled for Labels and disabled for Buttons.

Ralf Meier 22-Aug-16 0:44am

OK ... this might be the reason. To detect a DoubleClick it is necessary to wait a time to see if another Click is comming in. Only after this time an Event could be raised.
Also that matches to my own experiments :
I build a flag which is set with MouseDown and cleared with MouseUp. Wenn MouseDown comes and the flag isn't set I raise the Event. Now the Event is as fast as it Comes with a Button-Click.
Nice experience ...

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User 11060979 · Accepted Answer · 2016-08-21T21:20:00

Solution 3

After consulting the c# reference source and comparing Button and Control- especally ctors - I found that this does the job:

C#

public class MyLabel : Label
{
    public MyLabel()
    {
        SetStyle(ControlStyles.StandardDoubleClick, false);
    }
}

I hope it helps.

Posted 21-Aug-16 21:20pm

User 11060979

Comments

Ralf Meier 22-Aug-16 3:35am

Very good and thank you very much. This Solution is much better (and also much easier) than my own.
+5 !!!!

[no name] 22-Aug-16 3:41am

You are welcome. Thank you for your vote.

Maciej Los 22-Aug-16 4:11am

5ed!

[no name] 22-Aug-16 4:21am

Thank you very much Maciej.

Ralf Meier · Accepted Answer · 2016-08-21T19:09:00

Referring to the comments of 0x01AA and Alan N and my own researches I found this as "work-around" to create an own customized Button which inherits Control or ButtonBase or Label :

VB

Private fm_Click As Boolean = False

Protected Overrides Sub OnMouseDown(e As System.Windows.Forms.MouseEventArgs)
   If Not fm_Click Then
        RaiseEvent MouseClick(Me, e)
        fm_Click = True
    End If
     MyBase.OnMouseDown(e)
End Sub

Protected Overrides Sub OnMouseUp(e As System.Windows.Forms.MouseEventArgs)
    fm_Click = False
    MyBase.OnMouseUp(e)
End Sub

Public Shadows Event MouseClick(ByVal sender As Object, e As System.Windows.Forms.MouseEventArgs)

As Alan N has written in his comment, I suppose that the detect "delay" comes from the detection time which is needed to detect if an incomming Click could also be a DoubleClick.

Thanks to all for the comments which guided me to the goal ...