How to separate click from doubleclick ?

[krunch]

Hi
I have a PictureBox that reacts to click and doubleclick by doing 2 differents things, but the OnClick event is always triggered before OnDblClicked (same for OnMouseDown and OnMouseDblClick)...
How do you prevent OnClick when OnDblClicked ??

[Fred Tomke]

Hi, that's right, OnDoubleClick means automatically that OnClick was fired before (same in all other controls and AFAIK in all other programming languages).
Please have a look at MouseMove - it also will be called at OnClicked. So maybe you can check the time between two clicks.

Regards
Fred

[krunch]

Hi

Thanks.. if I include onMouseMove the sequences I get are :
- clic : (m) c m
- dbleclic : (m) c m d c c m

where : m = onMouseMove (+ a first (m) if the control hadn't focus) / c = onClicked / d = onDoubleClick

Not simple... :-(

I'll search how to use TIMER in these sequences, but meanwhile if someone has already made that...

[krunch]

Hi
I've tried something with dcl_DelayedInvoke... but this function has many inconvenients : can't prevent the command name on the command line (?) and especially the command became the last one in the interface, user accessible..
Please do you confirm that's a wrong way ?

Code (autolisp) Select Expand

(defun c:Untitled_Form1_PictureBox1_OnClicked (/)
  (setvar "CMDECHO" 0) ; no ?
  (setvar "NOMUTT" 1)
  (or *double (dcl_DelayedInvoke 350 "Do"))
)
(defun c:Untitled_Form1_PictureBox1_OnDblClicked (/)
  (setq *double T)
)
(defun c:Do ()
  (if *double (princ "\nClicClic!") (princ "\nClic!"))
  (setq *double nil)
  (setvar "CMDECHO" 1)
  (setvar "NOMUTT" 0)
  (princ)
)

[owenwengerd]

I think you are fighting a losing battle, and you should change your design instead.

[Fred Tomke]

Hi krunch,

Maybe we should focus on WHY it is necessary to separate OnClick from OnDblClick. Maybe there are other solutions for that.

An (very up-to-date) example: I have a list view. When I click on an item, OnClick will be called and immediately the event function takes a look into a database with a complex query and shows the result in a grid (!!!) below the listview. Works fine. But clearing the grid, executing the SQL command and refilling the grid takes a recognizeble amount of time. So when I doublick an item, a subform has to be shown. But since OnClicked is fired, too, before OnDblClicked could be fired, the time is over that Windows could recognize my double click as a double click and it accepts it for two single clicks  >:( That's why I introduced a intLastClick variable to store the latestly selected listview item to leave the content of OnClick event out and finally Windows recognizes my double click as a double click.

So that's why I think we should talk about what you're trying to do and maybe we'll find a solution.

Regards,
Fred

[EDIT] Owen said the sentence of my post in a much shorter way :)

[krunch]

Hi, thanks for your answers

Yes, that the same problem : OnClick triggers before OnDoubleClick and make unwanted result, that's why I start from triggers order..

So, what I make is a "button" (a PictureBox indeed) that inverse(-) on click / erase a value onDoubleClick... the value is in a textbox, the button is before (contiguous) the textbox.. simple!
The problem is not only "esthetic" (the fact that I see "-" for a split second before the value is erased), because some textboxes must receive "1" instead of "" (erase) on doubleclick (scale factor).. so in that case I get "-1" and not "1"..
So I think I have to separate the 2 events

Hoping to have been explicit..
Regards

[Fred Tomke]

Hm, krunch, I wanna play around with that. Would you be so kind to create a small example to demonstrate? Maybe with only the image (as button) and the textbox. Thing what I cannot imagine, is, that I don't believe that the customer is familiar with that procedure. But maybe I would change my mind if I "feel" it by myself. by default I'd use 2 different buttons for two different actions. Or you devide the image in the left area and the right area ...

Regards,
Fred

[krunch]

Hi

Sure!.. I made a simplified sample..

I precise that :

It's for this project (end of the page), so there's not 2 but 9 textboxes (may be +3 for columns), and when you click or doubleclick it updates the transformation...
The buttons (which will be more discrete and small) are placed in front of each textbox, and I manage inputs with my "Get_ControlName" function (btw I've also made a feature request here)

Thing what I cannot imagine, is, that I don't believe that the customer is familiar with that procedure

As I try it I think it's really easy to adopt..

Thanks for interest
Regards

[krunch]

Ok I think I give up..  :(
According to the sequences there's no perfect way. I could wait at the next OnMouseMove afer OnClicked-OnMouseMove but it means that a simple click is "validated" by this next OnMouseMove, so it's triggered only when I move after click..

I think I will make a button divided into 2 parts (+/- up and reset down)...  or maybe right-clic for reset / left-clic for inverse (+/-) ?

Thanks

[krunch]

Please do you confirm there's now way for the particularity of dcl_DelayedInvoke (can't prevent the command name on the command line (?) and especially the command became the last one in the interface, user accessible..) and no way to DelayedInvoke a standart function (not c:) ? Thanks in advance

[Fred Tomke]

Hi, krunch, sorry, I haven't seen your sample yet. I'll try it later this evening.

Fred

[Fred Tomke]

Hello, krunch,

hm, have you ever thought about right click on the imagebutton?

On the other hand I've found out that OnClicked will be fired twice so I hope Owen could pay attention to this topic again. :)

I've changed your sample and I attached it again. When you doubleclick an imagebutton, you can see the following lines in the command line.

Code Select Expand

PictureBox1_OnClicked
PictureBox1_OnDblClicked
PictureBox1_OnClicked

I'm not sure whether this behaviour is wanted. Maybe Owen can light up this for us.
I'll recommend you to use two different buttons for two different things - otherwise you will have to fight battles with your customers. I mean discussions about usability.

Regards,

Fred

[krunch]

Yes I came to the same conclusion : when DoubleClicked there's no way to prevent the 1st OnClicked event.. except with a delayed device, but DelayedInvoke operates as an AutoCad command, so it's no good  :(

Thanks Fred

[owenwengerd]

Fred, I'm not sure what exactly I'm supposed to test to reproduce this. Can you attach sample files in a new reply?