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Arrow Keys

P: n/a
How can you detect when an arrow key gets pressed? Doesn't seem to trigger
a KeyPress or KeyDown event. Thanks.

Jerry
Nov 21 '05 #1
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11 Replies


P: n/a
use the KeyDown event.

"Rlrcstr" wrote:
How can you detect when an arrow key gets pressed? Doesn't seem to trigger
a KeyPress or KeyDown event. Thanks.

Jerry

Nov 21 '05 #2

P: n/a
sorry - posted too soon ... use the KeyDown event. check for keys.left and
keys.right. if your KeyDown handler is form-wide, dont forget to set
KeyPreview to true.
"Rlrcstr" wrote:
How can you detect when an arrow key gets pressed? Doesn't seem to trigger
a KeyPress or KeyDown event. Thanks.

Jerry

Nov 21 '05 #3

P: n/a
I'm not getting an event when the arrow is pressed. I do get one when the
space bar is pressed, but not on an arrow press.

Any thoughts?
"AMercer" <AM*****@discussions.microsoft.com> wrote in message
news:6B**********************************@microsof t.com...
sorry - posted too soon ... use the KeyDown event. check for keys.left
and
keys.right. if your KeyDown handler is form-wide, dont forget to set
KeyPreview to true.
"Rlrcstr" wrote:
> How can you detect when an arrow key gets pressed? Doesn't seem to
> trigger
> a KeyPress or KeyDown event. Thanks.
>
> Jerry
>
>
>

Nov 21 '05 #4

P: n/a
I have no problems with KeyDown getting both arrow key events and space key.
You get space but not arrow. What controls do you have on the form? Almost
certainly the arrow keys are being intercepted by a control on your form.
Search the .net help for "arrow and keydown" for interesting reading.
Nov 21 '05 #5

P: n/a
It's a usercontrol inside a scrollable panel container inside another
usercontrol.

I'm creating the inner usercontrols dynamically and then allowing the user
to scroll through as many as have been created. Kinda like a listbox forthe
usercontrols.

I originally tried actually using an ownerdraw listbox - it has a controls
collection - but it also has issues displaying controls when scrolling, so I
decided to create my own.

I'm very close but I still have to main issues and one of them is that I'm
not getting the KeyDown trigger when an arrow is pressed. I don't
understand why I would get other KeyDown events and not the arrows. It's
strange seems that I get every other key. I even get modified arrows (i.e.
Ctrl + Arrow) but nothing on a plain old arrow.

I will search as you suggested, but in the mean time, if you have any other
thoughts, I'm open...

Jerry

"AMercer" <AM*****@discussions.microsoft.com> wrote in message
news:A3**********************************@microsof t.com...
I have no problems with KeyDown getting both arrow key events and space
key.
You get space but not arrow. What controls do you have on the form?
Almost
certainly the arrow keys are being intercepted by a control on your form.
Search the .net help for "arrow and keydown" for interesting reading.

Nov 21 '05 #6

P: n/a
Override IsInputKey

Protected Overrides Function IsInputKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
IsInputKey = True
End Function

"Rlrcstr" <rl*****@msn.com> wrote in message
news:ur**************@tk2msftngp13.phx.gbl...
It's a usercontrol inside a scrollable panel container inside another
usercontrol.

I'm creating the inner usercontrols dynamically and then allowing the user
to scroll through as many as have been created. Kinda like a listbox
forthe usercontrols.

I originally tried actually using an ownerdraw listbox - it has a controls
collection - but it also has issues displaying controls when scrolling, so
I decided to create my own.

I'm very close but I still have to main issues and one of them is that I'm
not getting the KeyDown trigger when an arrow is pressed. I don't
understand why I would get other KeyDown events and not the arrows. It's
strange seems that I get every other key. I even get modified arrows
(i.e. Ctrl + Arrow) but nothing on a plain old arrow.

I will search as you suggested, but in the mean time, if you have any
other thoughts, I'm open...

Jerry

"AMercer" <AM*****@discussions.microsoft.com> wrote in message
news:A3**********************************@microsof t.com...
I have no problems with KeyDown getting both arrow key events and space
key.
You get space but not arrow. What controls do you have on the form?
Almost
certainly the arrow keys are being intercepted by a control on your form.
Search the .net help for "arrow and keydown" for interesting reading.


Nov 21 '05 #7

P: n/a
I started to read something about that. How can you do that with a control
that is instantiated dynamically? Or do I have to create my own subclass?

Thanks.

Jerry
"Some Guy" <my*****@there.com> wrote in message
news:11*************@corp.supernews.com...
Override IsInputKey

Protected Overrides Function IsInputKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
IsInputKey = True
End Function

"Rlrcstr" <rl*****@msn.com> wrote in message
news:ur**************@tk2msftngp13.phx.gbl...
It's a usercontrol inside a scrollable panel container inside another
usercontrol.

I'm creating the inner usercontrols dynamically and then allowing the
user to scroll through as many as have been created. Kinda like a
listbox forthe usercontrols.

I originally tried actually using an ownerdraw listbox - it has a
controls collection - but it also has issues displaying controls when
scrolling, so I decided to create my own.

I'm very close but I still have to main issues and one of them is that
I'm not getting the KeyDown trigger when an arrow is pressed. I don't
understand why I would get other KeyDown events and not the arrows. It's
strange seems that I get every other key. I even get modified arrows
(i.e. Ctrl + Arrow) but nothing on a plain old arrow.

I will search as you suggested, but in the mean time, if you have any
other thoughts, I'm open...

Jerry

"AMercer" <AM*****@discussions.microsoft.com> wrote in message
news:A3**********************************@microsof t.com...
I have no problems with KeyDown getting both arrow key events and space
key.
You get space but not arrow. What controls do you have on the form?
Almost
certainly the arrow keys are being intercepted by a control on your
form.
Search the .net help for "arrow and keydown" for interesting reading.



Nov 21 '05 #8

P: n/a
Yes, not hard. You don't even have to create a library to do it.
Public Class UserControl1
Inherits System.Windows.Forms.UserControl

Public Sub New()
Mybase.New()
End Sub

Protected Overrides Function IsInputKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
IsInputKey = True
End Function

End Class
Your form:

Dim Withevents myControl as UserControl1

mycontrol.Parent = '-- Whatever
myControl.Location = '-- Wherever
myControl.Size = '-- Whatever
"Rlrcstr" <rl*****@msn.com> wrote in message
news:Or******************@TK2MSFTNGP14.phx.gbl...
I started to read something about that. How can you do that with a control
that is instantiated dynamically? Or do I have to create my own subclass?

Thanks.

Jerry
"Some Guy" <my*****@there.com> wrote in message
news:11*************@corp.supernews.com...
Override IsInputKey

Protected Overrides Function IsInputKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
IsInputKey = True
End Function

"Rlrcstr" <rl*****@msn.com> wrote in message
news:ur**************@tk2msftngp13.phx.gbl...
It's a usercontrol inside a scrollable panel container inside another
usercontrol.

I'm creating the inner usercontrols dynamically and then allowing the
user to scroll through as many as have been created. Kinda like a
listbox forthe usercontrols.

I originally tried actually using an ownerdraw listbox - it has a
controls collection - but it also has issues displaying controls when
scrolling, so I decided to create my own.

I'm very close but I still have to main issues and one of them is that
I'm not getting the KeyDown trigger when an arrow is pressed. I don't
understand why I would get other KeyDown events and not the arrows.
It's strange seems that I get every other key. I even get modified
arrows (i.e. Ctrl + Arrow) but nothing on a plain old arrow.

I will search as you suggested, but in the mean time, if you have any
other thoughts, I'm open...

Jerry

"AMercer" <AM*****@discussions.microsoft.com> wrote in message
news:A3**********************************@microsof t.com...
I have no problems with KeyDown getting both arrow key events and space
key.
You get space but not arrow. What controls do you have on the form?
Almost
certainly the arrow keys are being intercepted by a control on your
form.
Search the .net help for "arrow and keydown" for interesting reading.



Nov 21 '05 #9

P: n/a
Makes perfect sense. Thanks.

Jerry
"Some Guy" <my*****@there.com> wrote in message
news:11*************@corp.supernews.com...
Yes, not hard. You don't even have to create a library to do it.
Public Class UserControl1
Inherits System.Windows.Forms.UserControl

Public Sub New()
Mybase.New()
End Sub

Protected Overrides Function IsInputKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
IsInputKey = True
End Function

End Class
Your form:

Dim Withevents myControl as UserControl1

mycontrol.Parent = '-- Whatever
myControl.Location = '-- Wherever
myControl.Size = '-- Whatever
"Rlrcstr" <rl*****@msn.com> wrote in message
news:Or******************@TK2MSFTNGP14.phx.gbl...
I started to read something about that. How can you do that with a
control that is instantiated dynamically? Or do I have to create my own
subclass?

Thanks.

Jerry
"Some Guy" <my*****@there.com> wrote in message
news:11*************@corp.supernews.com...
Override IsInputKey

Protected Overrides Function IsInputKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
IsInputKey = True
End Function

"Rlrcstr" <rl*****@msn.com> wrote in message
news:ur**************@tk2msftngp13.phx.gbl...
It's a usercontrol inside a scrollable panel container inside another
usercontrol.

I'm creating the inner usercontrols dynamically and then allowing the
user to scroll through as many as have been created. Kinda like a
listbox forthe usercontrols.

I originally tried actually using an ownerdraw listbox - it has a
controls collection - but it also has issues displaying controls when
scrolling, so I decided to create my own.

I'm very close but I still have to main issues and one of them is that
I'm not getting the KeyDown trigger when an arrow is pressed. I don't
understand why I would get other KeyDown events and not the arrows.
It's strange seems that I get every other key. I even get modified
arrows (i.e. Ctrl + Arrow) but nothing on a plain old arrow.

I will search as you suggested, but in the mean time, if you have any
other thoughts, I'm open...

Jerry

"AMercer" <AM*****@discussions.microsoft.com> wrote in message
news:A3**********************************@microsof t.com...
>I have no problems with KeyDown getting both arrow key events and space
>key.
> You get space but not arrow. What controls do you have on the form?
> Almost
> certainly the arrow keys are being intercepted by a control on your
> form.
> Search the .net help for "arrow and keydown" for interesting reading.



Nov 21 '05 #10

P: n/a
I spoke too soon. It makes sense, but it doesn't seem to work.

I created the new class and replaced my New statement with the new class,
but the IsInputKey function in the subclass never gets called - I get the
same behavior. No arrows.

These controls are in a panel control. Do I have to subclass that guy? Is
it absorbing the keystrokes? Or do I have to subclass each of the child
controls (checkboxes and labels) on the new usercontrol and do the same
thing with them? This just seems so much more complicated that it should
be, just to capture an arrow key press.

Thanks.

Jerry

"Rlrcstr" <rl*****@msn.com> wrote in message
news:uS**************@TK2MSFTNGP14.phx.gbl...
Makes perfect sense. Thanks.

Jerry
"Some Guy" <my*****@there.com> wrote in message
news:11*************@corp.supernews.com...
Yes, not hard. You don't even have to create a library to do it.
Public Class UserControl1
Inherits System.Windows.Forms.UserControl

Public Sub New()
Mybase.New()
End Sub

Protected Overrides Function IsInputKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
IsInputKey = True
End Function

End Class
Your form:

Dim Withevents myControl as UserControl1

mycontrol.Parent = '-- Whatever
myControl.Location = '-- Wherever
myControl.Size = '-- Whatever
"Rlrcstr" <rl*****@msn.com> wrote in message
news:Or******************@TK2MSFTNGP14.phx.gbl...
I started to read something about that. How can you do that with a
control that is instantiated dynamically? Or do I have to create my own
subclass?

Thanks.

Jerry
"Some Guy" <my*****@there.com> wrote in message
news:11*************@corp.supernews.com...
Override IsInputKey

Protected Overrides Function IsInputKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
IsInputKey = True
End Function

"Rlrcstr" <rl*****@msn.com> wrote in message
news:ur**************@tk2msftngp13.phx.gbl...
> It's a usercontrol inside a scrollable panel container inside another
> usercontrol.
>
> I'm creating the inner usercontrols dynamically and then allowing the
> user to scroll through as many as have been created. Kinda like a
> listbox forthe usercontrols.
>
> I originally tried actually using an ownerdraw listbox - it has a
> controls collection - but it also has issues displaying controls when
> scrolling, so I decided to create my own.
>
> I'm very close but I still have to main issues and one of them is that
> I'm not getting the KeyDown trigger when an arrow is pressed. I don't
> understand why I would get other KeyDown events and not the arrows.
> It's strange seems that I get every other key. I even get modified
> arrows (i.e. Ctrl + Arrow) but nothing on a plain old arrow.
>
> I will search as you suggested, but in the mean time, if you have any
> other thoughts, I'm open...
>
> Jerry
>
> "AMercer" <AM*****@discussions.microsoft.com> wrote in message
> news:A3**********************************@microsof t.com...
>>I have no problems with KeyDown getting both arrow key events and
>>space key.
>> You get space but not arrow. What controls do you have on the form?
>> Almost
>> certainly the arrow keys are being intercepted by a control on your
>> form.
>> Search the .net help for "arrow and keydown" for interesting reading.
>
>



Nov 21 '05 #11

P: n/a
Got it...

You have to override IsInputKey in the child controls and return true for
keys that you want the parent to see and then override processKeyPreview in
the parent and look for those keystrokes.

Thanks for your help. On to the next hurdle...

Jerry

Have to override the processKeyPreview event in the usercontrol
"Some Guy" <my*****@there.com> wrote in message
news:11*************@corp.supernews.com...
Yes, not hard. You don't even have to create a library to do it.
Public Class UserControl1
Inherits System.Windows.Forms.UserControl

Public Sub New()
Mybase.New()
End Sub

Protected Overrides Function IsInputKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
IsInputKey = True
End Function

End Class
Your form:

Dim Withevents myControl as UserControl1

mycontrol.Parent = '-- Whatever
myControl.Location = '-- Wherever
myControl.Size = '-- Whatever
"Rlrcstr" <rl*****@msn.com> wrote in message
news:Or******************@TK2MSFTNGP14.phx.gbl...
I started to read something about that. How can you do that with a
control that is instantiated dynamically? Or do I have to create my own
subclass?

Thanks.

Jerry
"Some Guy" <my*****@there.com> wrote in message
news:11*************@corp.supernews.com...
Override IsInputKey

Protected Overrides Function IsInputKey(ByVal keyData As
System.Windows.Forms.Keys) As Boolean
IsInputKey = True
End Function

"Rlrcstr" <rl*****@msn.com> wrote in message
news:ur**************@tk2msftngp13.phx.gbl...
It's a usercontrol inside a scrollable panel container inside another
usercontrol.

I'm creating the inner usercontrols dynamically and then allowing the
user to scroll through as many as have been created. Kinda like a
listbox forthe usercontrols.

I originally tried actually using an ownerdraw listbox - it has a
controls collection - but it also has issues displaying controls when
scrolling, so I decided to create my own.

I'm very close but I still have to main issues and one of them is that
I'm not getting the KeyDown trigger when an arrow is pressed. I don't
understand why I would get other KeyDown events and not the arrows.
It's strange seems that I get every other key. I even get modified
arrows (i.e. Ctrl + Arrow) but nothing on a plain old arrow.

I will search as you suggested, but in the mean time, if you have any
other thoughts, I'm open...

Jerry

"AMercer" <AM*****@discussions.microsoft.com> wrote in message
news:A3**********************************@microsof t.com...
>I have no problems with KeyDown getting both arrow key events and space
>key.
> You get space but not arrow. What controls do you have on the form?
> Almost
> certainly the arrow keys are being intercepted by a control on your
> form.
> Search the .net help for "arrow and keydown" for interesting reading.



Nov 21 '05 #12

This discussion thread is closed

Replies have been disabled for this discussion.