public static void UnregisterFormHotKey(Keys keys, Function <bool, Keys> callback)
{
if (hotkeyRegistrar != null)
{
Function <bool, Keys> theDelegate = hotkeyRegistrar[keys];
theDelegate -= callback;
hotkeyRegistrar[keys] = theDelegate;
IComponent targetAsComponent = callback.Target as IComponent;
if (targetAsComponent != null)
{
targetAsComponent.Disposed -= TargetAsComponent_Disposed;
}
IHotKeyTarget targetAsHotKeyTarget = callback.Target as IHotKeyTarget;
if (targetAsHotKeyTarget != null)
{
targetAsHotKeyTarget.Disposed -= TargetAsHotKeyTarget_Disposed;
}
if (theDelegate.GetInvocationList().Length == 0)
{
hotkeyRegistrar.Remove(keys);
}
if (hotkeyRegistrar.Count == 0)
{
hotkeyRegistrar = null;
}
}
}
/// <summary>
/// Registers a form-wide hot key, and a callback for when the key is pressed.
/// The callback must be an instance method on a Control. Whatever Form the Control
/// is on will process the hotkey, as long as the Form is derived from PdnBaseForm.
/// </summary>
public static void RegisterFormHotKey(Keys keys, Function <bool, Keys> callback)
{
IComponent targetAsComponent = callback.Target as IComponent;
IHotKeyTarget targetAsHotKeyTarget = callback.Target as IHotKeyTarget;
if (targetAsComponent == null && targetAsHotKeyTarget == null)
{
throw new ArgumentException("target instance must implement IComponent or IHotKeyTarget", "callback");
}
if (hotkeyRegistrar == null)
{
hotkeyRegistrar = new Dictionary <Keys, Function <bool, Keys> >();
}
Function <bool, Keys> theDelegate = null;
if (hotkeyRegistrar.ContainsKey(keys))
{
theDelegate = hotkeyRegistrar[keys];
theDelegate += callback;
hotkeyRegistrar[keys] = theDelegate;
}
else
{
theDelegate = new Function <bool, Keys>(callback);
hotkeyRegistrar.Add(keys, theDelegate);
}
if (targetAsComponent != null)
{
targetAsComponent.Disposed += TargetAsComponent_Disposed;
}
else
{
targetAsHotKeyTarget.Disposed += TargetAsHotKeyTarget_Disposed;
}
}
