Resizing a form

[Søren Reinke]

Hi there

I have a little problem.

How do i make sure that a graph is not redrawn while the form with the graph
is being resized ?
I have tried to add a mouse up/down event handler on the form1, but it
dosn't get called when resizing :(

I would like to be able to resize my form, but also make sure the graph is
only redrawn when the user is not resizing any more.

Hope my question make sense :)

--
Søren Reinke
www.Xray-Mag.com/ - Your free diving magazin on the net.
Current issue Diving in North America, 99 pages.
Download it in PDF

[Frans Bouma [C# MVP]]

Søren Reinke wrote:

Hi there

I have a little problem.

How do i make sure that a graph is not redrawn while the form with the graph
is being resized ?
I have tried to add a mouse up/down event handler on the form1, but it
dosn't get called when resizing :(

I would like to be able to resize my form, but also make sure the graph is
only redrawn when the user is not resizing any more.

Hope my question make sense :)

First, override OnResize() and the first time you enter that method,
you set a flag. You also call this.SuspendLay out();, if the flag was
wasn't set already.

then, you override OnSizeChanged. In there, you reset the flag and call
this.ResumeLayo ut(false);. Then draw your graph.

Frans

--
------------------------------------------------------------------------
Get LLBLGen Pro, productive O/R mapping for .NET: http://www.llblgen.com
My .NET blog: http://weblogs.asp.net/fbouma
Microsoft MVP (C#)
------------------------------------------------------------------------

[Alan Pretre]

"Søren Reinke" <so***@reinke.f jernmig.dk> wrote in message
news:d5******** ***@newsbin.cyb ercity.dk...

How do i make sure that a graph is not redrawn while the form with the
graph is being resized ?

I would like to be able to resize my form, but also make sure the graph is
only redrawn when the user is not resizing any more.

It depends on the control. Sometimes there is a BeginUpdate/EndUpdate
mechanism, other times you have to call the Win32 ValidateRect() function,
passing in the control's window handle and client area.

-- Alan

[Søren Reinke]

>>

I would like to be able to resize my form, but also make sure the graph
is only redrawn when the user is not resizing any more.

Hope my question make sense :)

First, override OnResize() and the first time you enter that method, you
set a flag. You also call this.SuspendLay out();, if the flag was wasn't
set already.

then, you override OnSizeChanged. In there, you reset the flag and call
this.ResumeLayo ut(false);. Then draw your graph.

Frans

Hi Frans

Thanks for the tip, i'll try it :)

--
Søren Reinke
www.Xray-Mag.com/ - Your free diving magazin on the net.
Current issue Diving in North America, 99 pages.
Download it in PDF

[Rachel Suddeth]

I have a similar problem, but I don't see how this will work. Both Resize
and SizeChanged events get called multiple times during a single resizing
drag.

-Rachel

"Frans Bouma [C# MVP]" <pe************ ******@xs4all.n l> wrote in message
news:%2******** ********@TK2MSF TNGP12.phx.gbl. ..

Søren Reinke wrote:

Hi there

I have a little problem.

How do i make sure that a graph is not redrawn while the form with the graph is being resized ?
I have tried to add a mouse up/down event handler on the form1, but it
dosn't get called when resizing :(

I would like to be able to resize my form, but also make sure the graph is only redrawn when the user is not resizing any more.

Hope my question make sense :)

First, override OnResize() and the first time you enter that method,
you set a flag. You also call this.SuspendLay out();, if the flag was
wasn't set already.

then, you override OnSizeChanged. In there, you reset the flag and call
this.ResumeLayo ut(false);. Then draw your graph.

Frans

--
------------------------------------------------------------------------
Get LLBLGen Pro, productive O/R mapping for .NET: http://www.llblgen.com
My .NET blog: http://weblogs.asp.net/fbouma
Microsoft MVP (C#)
------------------------------------------------------------------------

[Frans Bouma [C# MVP]]

Rachel Suddeth wrote:

I have a similar problem, but I don't see how this will work. Both Resize
and SizeChanged events get called multiple times during a single resizing
drag.
Hmm. If SizeChanged is called multiple times, it indeed has a problem.
It then gets hacky, you then have to set a timer or something :X...

FB

-Rachel

"Frans Bouma [C# MVP]" <pe************ ******@xs4all.n l> wrote in message
news:%2******** ********@TK2MSF TNGP12.phx.gbl. ..

Søren Reinke wrote:

Hi there

I have a little problem.

How do i make sure that a graph is not redrawn while the form with the
graph
is being resized ?
I have tried to add a mouse up/down event handler on the form1, but it
dosn't get called when resizing :(

I would like to be able to resize my form, but also make sure the graph
is
only redrawn when the user is not resizing any more.

Hope my question make sense :)

First, override OnResize() and the first time you enter that method,
you set a flag. You also call this.SuspendLay out();, if the flag was
wasn't set already.

then, you override OnSizeChanged. In there, you reset the flag and call
this.ResumeLa yout(false);. Then draw your graph.

--
------------------------------------------------------------------------
Get LLBLGen Pro, productive O/R mapping for .NET: http://www.llblgen.com
My .NET blog: http://weblogs.asp.net/fbouma
Microsoft MVP (C#)
------------------------------------------------------------------------

[Mick Doherty]

The following link gives a VB solution, but it should be simple enough to
convert to C#

http://groups.google.co.uk/group/mic...a09c0cf8b9d9ca

--
Mick Doherty
http://dotnetrix.co.uk/nothing.html
"Frans Bouma [C# MVP]" <pe************ ******@xs4all.n l> wrote in message
news:%2******** ********@TK2MSF TNGP09.phx.gbl. ..

Rachel Suddeth wrote:

I have a similar problem, but I don't see how this will work. Both Resize
and SizeChanged events get called multiple times during a single resizing
drag.

Hmm. If SizeChanged is called multiple times, it indeed has a problem. It
then gets hacky, you then have to set a timer or something :X...

FB

-Rachel

"Frans Bouma [C# MVP]" <pe************ ******@xs4all.n l> wrote in message
news:%2******** ********@TK2MSF TNGP12.phx.gbl. ..

Søren Reinke wrote:

Hi there

I have a little problem.

How do i make sure that a graph is not redrawn while the form with the

graph

is being resized ?
I have tried to add a mouse up/down event handler on the form1, but it
dosn't get called when resizing :(

I would like to be able to resize my form, but also make sure the graph

is

only redrawn when the user is not resizing any more.

Hope my question make sense :)

First, override OnResize() and the first time you enter that method,
you set a flag. You also call this.SuspendLay out();, if the flag was
wasn't set already.

then, you override OnSizeChanged. In there, you reset the flag and call
this.ResumeL ayout(false);. Then draw your graph.

--
------------------------------------------------------------------------
Get LLBLGen Pro, productive O/R mapping for .NET: http://www.llblgen.com
My .NET blog: http://weblogs.asp.net/fbouma
Microsoft MVP (C#)
------------------------------------------------------------------------

[Rachel Suddeth]

Thanks, Mick, looks like that should work.
BTW, where do you get the constants from (for Windows messages)? You pull
them from a C++ header file?

-Rachel

"Mick Doherty"
<EX***********@ AND.REMOVE.SQUA REBRACKETS.[mdaudi100#ntlwo rld.com]> wrote in
message news:eg******** ******@TK2MSFTN GP14.phx.gbl...

The following link gives a VB solution, but it should be simple enough to
convert to C#

http://groups.google.co.uk/group/mic...a09c0cf8b9d9ca
--
Mick Doherty
http://dotnetrix.co.uk/nothing.html
"Frans Bouma [C# MVP]" <pe************ ******@xs4all.n l> wrote in message
news:%2******** ********@TK2MSF TNGP09.phx.gbl. ..

Rachel Suddeth wrote:

I have a similar problem, but I don't see how this will work. Both Resize and SizeChanged events get called multiple times during a single resizing drag.

Hmm. If SizeChanged is called multiple times, it indeed has a problem. It then gets hacky, you then have to set a timer or something :X...

FB

-Rachel

"Frans Bouma [C# MVP]" <pe************ ******@xs4all.n l> wrote in message news:%2******** ********@TK2MSF TNGP12.phx.gbl. ..

Søren Reinke wrote:

>Hi there
>
>I have a little problem.
>
>How do i make sure that a graph is not redrawn while the form with the

graph

>is being resized ?
>I have tried to add a mouse up/down event handler on the form1, but it
>dosn't get called when resizing :(
>
>I would like to be able to resize my form, but also make sure the graph
is

>only redrawn when the user is not resizing any more.
>
>Hope my question make sense :)

First, override OnResize() and the first time you enter that method,
you set a flag. You also call this.SuspendLay out();, if the flag was
wasn't set already.

then, you override OnSizeChanged. In there, you reset the flag and call
this.ResumeL ayout(false);. Then draw your graph.

--
------------------------------------------------------------------------
Get LLBLGen Pro, productive O/R mapping for .NET: http://www.llblgen.com
My .NET blog: http://weblogs.asp.net/fbouma
Microsoft MVP (C#)
------------------------------------------------------------------------

[Mick Doherty]

Depends on my mood. Sometimes I look them up (winuser.h in this case),
sometimes I google and sometimes I just put Console.WriteLi ne(m.ToString() );
in the WndProc() method. Usually the latter since I'm often checking to see
what messages are being sent. Then it's off to the MSDN documentation to
find out what info I can read/change for the message.

--
Mick Doherty
http://dotnetrix.co.uk/nothing.html
"Rachel Suddeth" <ra****@bldhoun d.com> wrote in message
news:OS******** ******@TK2MSFTN GP15.phx.gbl...

Thanks, Mick, looks like that should work.
BTW, where do you get the constants from (for Windows messages)? You pull
them from a C++ header file?

-Rachel

"Mick Doherty"
<EX***********@ AND.REMOVE.SQUA REBRACKETS.[mdaudi100#ntlwo rld.com]> wrote
in
message news:eg******** ******@TK2MSFTN GP14.phx.gbl...

The following link gives a VB solution, but it should be simple enough to
convert to C#

http://groups.google.co.uk/group/mic...a09c0cf8b9d9ca

--
Mick Doherty
http://dotnetrix.co.uk/nothing.html
"Frans Bouma [C# MVP]" <pe************ ******@xs4all.n l> wrote in message
news:%2******** ********@TK2MSF TNGP09.phx.gbl. ..

> Rachel Suddeth wrote:
>> I have a similar problem, but I don't see how this will work. Both Resize >> and SizeChanged events get called multiple times during a single resizing >> drag.
>
> Hmm. If SizeChanged is called multiple times, it indeed has a problem. It > then gets hacky, you then have to set a timer or something :X...
>
> FB
>
>>
>> -Rachel
>>
>> "Frans Bouma [C# MVP]" <pe************ ******@xs4all.n l> wrote in message >> news:%2******** ********@TK2MSF TNGP12.phx.gbl. ..
>>
>>>Søren Reinke wrote:
>>>
>>>>Hi there
>>>>
>>>>I have a little problem.
>>>>
>>>>How do i make sure that a graph is not redrawn while the form with
>>>>the
>>
>> graph
>>
>>>>is being resized ?
>>>>I have tried to add a mouse up/down event handler on the form1, but
>>>>it
>>>>dosn't get called when resizing :(
>>>>
>>>>I would like to be able to resize my form, but also make sure the graph >>
>> is
>>
>>>>only redrawn when the user is not resizing any more.
>>>>
>>>>Hope my question make sense :)
>>>
>>>First, override OnResize() and the first time you enter that method,
>>>you set a flag. You also call this.SuspendLay out();, if the flag was
>>>wasn't set already.
>>>
>>>then, you override OnSizeChanged. In there, you reset the flag and
>>>call
>>>this.ResumeL ayout(false);. Then draw your graph.
>
>
> --
> ------------------------------------------------------------------------
> Get LLBLGen Pro, productive O/R mapping for .NET:
> http://www.llblgen.com
> My .NET blog: http://weblogs.asp.net/fbouma
> Microsoft MVP (C#)
> ------------------------------------------------------------------------

[Rachel Suddeth]

All right, I don't know VB, and I've never needed to do masking with C#, so
I have a couple questions about how to translate the WndProc in your
example. I think the "Static Sizemode" inside the method would have to be
replaces by a class level variable in C#? Also not quite sure about the
statement to set SizeMode?

----
private bool bSizeMode = false;
protected override void WndProc(ref Message m)
{
switch ( m.Msg )
{
case WM_SIZING:
// Resize event already provided
break;
case WM_SYSCOMMAND:
bSizeMode = ((m.WParam.ToIn t32() & 0xFFF0) == SC_SIZE);
break;
case WM_ENTERSIZEMOV E:
if ( bSizeMode )
{
OnBeginResize(E ventArgs.Empty) ;
}
break;
case WM_EXITSIZEMOVE :
{
if ( bSizeMode )
{
OnEndResize(Eve ntArgs.Empty);
}
break;
}

} // end switch
base.WndProc (ref m);
}
----

Here is the VB code "copied" above
------
Protected Overrides Sub WndProc(ByRef m As System.Windows. Forms.Message)
Static SizeMode As Boolean = False
Select Case m.Msg
Case WM_SIZING
'Already have a Resize Method
Case WM_SYSCOMMAND
SizeMode = ((m.WParam.ToIn t32 And &HFFF0) = SC_SIZE)
Case WM_ENTERSIZEMOV E
If SizeMode Then
OnBeginResize(E ventArgs.Empty)
End If
Case WM_EXITSIZEMOVE
If SizeMode Then
OnEndResize(Eve ntArgs.Empty)
End If
Case Else
End Select
MyBase.WndProc( m)
End Sub

---
Thanks,

Rachel

"Mick Doherty"
<EX***********@ AND.REMOVE.SQUA REBRACKETS.[mdaudi100#ntlwo rld.com]> wrote in
message news:eg******** ******@TK2MSFTN GP14.phx.gbl...

The following link gives a VB solution, but it should be simple enough to
convert to C#

http://groups.google.co.uk/group/mic...a09c0cf8b9d9ca
--
Mick Doherty
http://dotnetrix.co.uk/nothing.html