Windows Forms

lukeer wrote:

How can I disable a control and make it show WaitCursor at the same time?

private void button2_Click(object sender, EventArgs e)
{
    textBox1.Cursor = Cursors.Default;
    button1.Cursor = Cursors.Default;
    button2.Cursor = Cursors.Default;
    this.Focus();
}

this.Cursor=Cursors.WaitCursor;
// code that may take some tens or, when unlucky, hundreds of milliseconds
this.Cursor=Cursors.Default;

using(new LP_WaitCursor(this)) {
    // code that may take...
}

Luc Pattyn wrote:

Of course, the cursor stuff isn't pretty, however you can easily make a
disposable object for these purposes, so my code actually looks like:

using(new LP_WaitCursor(this)) {
    // code that may take...
}

 
where LP_WaitCursor holds a
Cursor=Cursors.WaitCursor in its constructor, and a
Cursor=Cursors.Default in its Dispose() method.

using System.Threading;            

private void button2_Click(object sender, EventArgs e)
{
  button2.Cursor = Cursors.WaitCursor;
  Thread.Sleep(10000);
  button2.Cursor = Cursors.Default;
}

using System;
using System.Windows.Forms;

namespace LP_Core {
    public class LP_WaitCursor : IDisposable {
        private Form form;
        public LP_WaitCursor(Form form) {
            this.form=form;
            form.Cursor=Cursors.WaitCursor;
        }
        public void Dispose() {
            form.Cursor=Cursors.Default;
        }
    }
}

string temp = someObject.SomeValue;
someObject.SomeValue = "Updating, call again later";
try
{
    // do stuff
}
finally
{
    someObject.SomeValue = temp;
}

Bastard Programmer from Hell

Eddy Vluggen wrote:

why use a Form over a Control?

Eddy Vluggen wrote:

an optional parameter to indicate whether to disable the control

Eddy Vluggen wrote:

LockWindowUpdate

Luc Pattyn wrote:

I considered that too, but I would probably never use it. Most apps have several ways to get something done (MainMenu.MenuItem, ContextMenu.MenuItem, Button, KeyDown), so there isn't just a single Control to disable, I often have a Command object that sits in between several Controls and a single Action, however that would make my WaitCursor too specialized IMO.

Luc Pattyn wrote:

Never used it. As it is bound to be a short operation, I probably would not care much. Longer operations, I'd do in a BGW, and I make sure the GUI updating is periodic rather than continuous.

Bastard Programmer from Hell