Comments on: Drawing a selection rubber band like Explorer

by: Oliver Sturm’s weblog - Drawing a selection rubber band like Explorer - improved

Fri, 26 Aug 2005 19:22:46 +0000

[…] I heard criticism about my first post on the topic: if a control was on the form, apart from the background drawing, the rubber rectangle would appear behind the control, not in front of it. Of course there are several ways to change this, I decided to implement one of them just for fun […]

by: Oliver Sturm

Fri, 26 Aug 2005 16:42:28 +0000

True. I meant that you don’t need the InitializeComponent to get my sample to work. I don’t care what else you do with your own copy of it

by: Larry

Fri, 26 Aug 2005 16:41:26 +0000

But, that’s exactly what I was doing - designing it in VS 2003.

I added a StatusBar to show the selection rectangle - live!

Without the InitializeComponent(), my new StatusBar was not being instantiated.

Thanks for the sample.

by: Oliver Sturm

Fri, 26 Aug 2005 16:36:08 +0000

No, that’s not right. You don’t need that because the class is a complete derived form in it’s own right. You need that only if you are going to design the class in VS, which you might do in a real-world app, but which is not intended for the sample.

by: Larry

Fri, 26 Aug 2005 16:33:58 +0000

Also, you must add the following line as the first line of the Form1 constructor:

InitializeComponent();

Probably caused by the partial classes in VS 2005.

by: Oliver Sturm

Fri, 26 Aug 2005 16:22:41 +0000

Larry, you are of course correct. It’s unbelievable how many details there are that are easily overlooked after using VS 2005 for a long while Thanks for pointing this out.

by: Larry

Fri, 26 Aug 2005 15:57:53 +0000

The following lines needed changing for VS 2003:

/* using System.Collections.Generic; */ using System.Collections;
/* DoubleBuffered = true; */ SetStyle(ControlStyles.DoubleBuffer ¦ ControlStyles.AllPaintingInWmPaint ¦ ControlStyles.UserPaint, true); 
/* e.Location; */ mouseDownPos = new Point(e.X, e.Y);

And you have to add a Program.cs to the project:

using System;
using System.Windows.Forms;

namespace SelectionRectTest
{
  class Program
  {
    [STAThread]
    static public void Main(string[] args) {
      Application.Run(new Form1());
    }
  }
}