Re: Why is MDI Parent's Controls always on top of MDI child?

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#444

From: Marc Rohloff TeamB
Date: Fri, 21 Oct 2005 22:24

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On 21 Oct 2005 09:15:44 -0700, Peter Jone wrote:

> Hi,
> 
> I am developing an MDI application. Let's say I place a 
> background image in the ParentForm. But when I show a 
> ChildForm, the ParentImage is always on top of the Child. I 
> tried ChildForm.BringToFront(), but then the ParentImage 
> becomes invisible. 

This is the way MDI works. Most people recommend against using it
since it is so quirky. Even Microsoft Office no longer uses it.

If you want a custom background then get an instance of the MDIClient
class, something like:

  Control c;
  MdiClient mc;

  foreach c in Controls 
  {
    mc := c as MdiClient; 
    if (mc != null) 
    {
      //Do stuff with MdiClient mc
      return;
    }
  }

For example:
  mc.BackColor = 
or  
  mc.BackgroundImage =   
if you want something more advanced you have to assign an event
handler for the 'Paint' event.

-- 
the normal way to do this is to override the Paint method on the MDI
parent window

-- 
Marc Rohloff [TeamB]
marc rohloff -at- myrealbox -dot- com

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