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

[Rachel Suddeth]

Nevermind, it's working perfectly so it must be right :-)
Here is the whole business in C#, in case that helps anyone...

---
// Variables having to do with the resizing code follow
protected bool bSizeMode = false;

/// <summary>
/// Windows Constants for WndProc call in BeginResize/EndResize events
/// </summary>
protected const int WM_SIZING = 0x214,
WM_ENTERSIZEMOV E = 0x231,
WM_EXITSIZEMOVE = 0x232,
WM_SYSCOMMAND = 0x112,
SC_SIZE = 0xF000;

/// <summary>
/// Fires once at the beginning of a resizing drag.
/// </summary>
public event EventHandler BeginResize;

/// <summary>
/// Fires once at the end of a resizing drag.
/// </summary>
public event EventHandler EndResize;
/// <summary>
/// Process Windows messages (in this case to provide Begin/EndResize events
/// </summary>
/// <param name="m"></param>
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);
}
/// <summary>
/// Raise BeginResize event
/// </summary>
/// <param name="e"></param>
protected virtual void OnBeginResize(S ystem.EventArgs e)
{
if ( BeginResize != null )
BeginResize(thi s, e);
}

/// <summary>
/// Raise EndResize event
/// </summary>
/// <param name="e"></param>
protected virtual void OnEndResize(Sys tem.EventArgs e)
{
if ( EndResize != null )
EndResize(this, e);
}
---

[Mick Doherty]

You're right that VB's local Static variable must be declared as a Class
level variable in C#.

....and the translation looks good to me :-)

--
Mick Doherty
http://dotnetrix.co.uk/nothing.html
"Rachel Suddeth" <ra****@bldhoun d.com> wrote in message
news:ed******** *****@TK2MSFTNG P12.phx.gbl...

Nevermind, it's working perfectly so it must be right :-)
Here is the whole business in C#, in case that helps anyone...

---
// Variables having to do with the resizing code follow
protected bool bSizeMode = false;

/// <summary>
/// Windows Constants for WndProc call in BeginResize/EndResize events
/// </summary>
protected const int WM_SIZING = 0x214,
WM_ENTERSIZEMOV E = 0x231,
WM_EXITSIZEMOVE = 0x232,
WM_SYSCOMMAND = 0x112,
SC_SIZE = 0xF000;

/// <summary>
/// Fires once at the beginning of a resizing drag.
/// </summary>
public event EventHandler BeginResize;

/// <summary>
/// Fires once at the end of a resizing drag.
/// </summary>
public event EventHandler EndResize;
/// <summary>
/// Process Windows messages (in this case to provide Begin/EndResize
events
/// </summary>
/// <param name="m"></param>
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);
}
/// <summary>
/// Raise BeginResize event
/// </summary>
/// <param name="e"></param>
protected virtual void OnBeginResize(S ystem.EventArgs e)
{
if ( BeginResize != null )
BeginResize(thi s, e);
}

/// <summary>
/// Raise EndResize event
/// </summary>
/// <param name="e"></param>
protected virtual void OnEndResize(Sys tem.EventArgs e)
{
if ( EndResize != null )
EndResize(this, e);
}
---

[Søren Reinke]

> Here is the whole business in C#, in case that helps anyone...

---

Thanks Rachel

I'll try to implement it soon.

--
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