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gamesmeister
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Direction Keys not firing KeyDown event
Oct 24th, 2006 at 7:02pm
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As per the subject, I've added a KeyDown event to my flowchart. It seems to pick up every key except the cursor (directional) keys, which don't seem to fire the event.

Any idea why not?

Many thanks
Gerry
  
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Stoyo
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Re: Direction Keys not firing KeyDown event
Reply #1 - Oct 25th, 2006 at 5:15am
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The cursor keys are used for form navigation and by default they are not sent to controls on the form. You can work around that by overriding the IsInputKey method and returning true for the keys you need to process.

I hope that helps,
Stoyan
  
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gamesmeister
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Re: Direction Keys not firing KeyDown event
Reply #2 - Oct 25th, 2006 at 9:38pm
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Well I tried it, by adding the following to the form containing my flowchart.

protected override bool IsInputKey(Keys keyData)
{
switch(keyData)
{
case Keys.Left:
case Keys.Right:
case Keys.Up:
case Keys.Down:
return true;
default:
return base.IsInputKey(keyData);
}

}

This didn't work though, and didn't seem to get fired when I pressed a key either. Any idea what I'm doing wrong?

Thanks again
Gerry
  
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Stoyo
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Re: Direction Keys not firing KeyDown event
Reply #3 - Oct 26th, 2006 at 5:10am
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Hi,

You must create a new class derived from FlowChart and override that method there. Then put your FlowChart class on the form and the keys should work ok - just replace the 'FlowChart fc;' declaration in the form class with 'MyFlowChart fc;', and change the constructor call from 'new FlowChart()' to 'new MyFlowChart()'.

Stoyan
  
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