2 Controls overlap

  • Thread starter Thread starter Martijn Mulder
  • Start date Start date
M

Martijn Mulder

I want 2 UserControls with Dock=DockStyle.Fill share the same space in a
Form, ie Paint them on top of each other.

I made the UserControls keep the Background intact, but only one shows up.
See the code below:


//using...
using System.Drawing;
using System.Windows.Forms;


//class Circle
class Circle: UserControl
{

//constructor
public Circle()
{
Dock= DockStyle.Fill;
}

//method OnPaint
override protected void OnPaint( PaintEventArgs e)
{
e.Graphics.FillEllipse( Brushes.Yellow, new Rectangle(5, 5, 50, 50));
}

//method OnPaintBackground
override protected void OnPaintBackground( PaintEventArgs e)
{
//Do nothing. Leave Background intact
}
}


//class Square
class Square: UserControl
{

//constructor
public Square()
{
Dock= DockStyle.Fill;
}

//method OnPaint
override protected void OnPaint( PaintEventArgs e)
{
e.Graphics.FillRectangle( Brushes.Red, new Rectangle( 25, 25, 50, 50));
}

//method OnPaintBackground
override protected void OnPaintBackground( PaintEventArgs e)
{
//Do nothing. Leave Background intact
}
}


//class MainForm
class MainForm: Form
{

//constructor
MainForm()
{
Text="Controls Share Space (NOT!)"; // Only the Circle shows!
Controls.Add( new Circle());
Controls.Add( new Square());
}

//method Main
static void Main()
{
Application.Run(new MainForm());
}
}
 
I want 2 UserControls with Dock=DockStyle.Fill share the same space in a
Form, ie Paint them on top of each other.

I made the UserControls keep the Background intact, but only one shows up.
See the code below:
Click to expand...

[code snipped]

That is the behaviour I would expect. If I put a plate on a table then put
another plate on top of the first plate I would only be able to see the
top plate when looking down at them.
 
That is the behaviour I would expect. If I put a plate on a table then put
another plate on top of the first plate I would only be able to see the
top plate when looking down at them.
Click to expand...

So it is by design? It is not like stacking glass plates, one with green
eggs, the other with ham. So that when I look from above, I see green eggs
and ham?
 
So it is by design? It is not like stacking glass plates, one with green
eggs, the other with ham. So that when I look from above, I see green eggs
and ham?
Click to expand...

The plate analogy is making me feel sick now :-)

I would say it is by design, the top most item covers what is underneath.
Can you set the transparency on the controls? I've never done it but it
may give you the 'glass plate' effect.
 
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