I want to temporarily disable the arrow keys in the grid. When a row is selected, I do some image processing for that row, which typically takes .25 to 2 seconds. During that processing time, I want to disable the arrow keys during processing and then enable them when done. I created a bool isBusy Flag for the processing, but I cannot add that to the below custom behavior. Any suggestions? Is there a way to toggle the Custom behavior?
public class CustomGridBehavior : BaseGridBehavior
{
public override bool ProcessKey(KeyEventArgs keys__1)
{
switch (keys__1.KeyCode)
{
case Keys.Up:
case Keys.Down:
case Keys.Left:
case Keys.Right:
{
return false;
}
default:
{
return base.ProcessKey(keys__1);
}
}
}
}
1 Answer, 1 is accepted
Hello, Claude,
I have prepared a sample code snippet demonstrating how to use the RadGridView.Tag property to store any useful information that can be used during the application's execution. Thus, we wouldn't need a Boolean flag: public RadForm1()
{
InitializeComponent();
this.radGridView1.GridBehavior = new CustomGridBehavior();
}
bool isBusy = false;
private void radButton1_Click(object sender, EventArgs e)
{
isBusy = !isBusy;
if (isBusy)
{
this.radGridView1.Tag = "isBusy";
}
else
{
this.radGridView1.Tag = null;
}
}
}
public class CustomGridBehavior : BaseGridBehavior
{
public override bool ProcessKey(KeyEventArgs keys__1)
{
switch (keys__1.KeyCode)
{
case Keys.Up:
case Keys.Down:
case Keys.Left:
case Keys.Right:
{
if (this.GridControl.Tag != null && this.GridControl.Tag == "isBusy")
{
return false;
}
return base.ProcessKey(keys__1);
}
default:
{
return base.ProcessKey(keys__1);
}
}
}
}If the mentioned image processing is a time consuming operation, I would suggest you to consider using a BackgroundWorker and do the work outside the main UI thread. A sample approach for executing long-lasting operations is demonstrated in the following help article: https://docs.telerik.com/devtools/winforms/controls/track-and-status-controls/waitingbar/using-waitingbar-with-a-background-worker
I hope this information helps. If you need any further assistance please don't hesitate to contact me.
Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik
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