You can handle the Calendar.ItemClick event and display the context menu in the event handler. There you can obtain a reference to the clicked item through the event arguments passed to the event handler and adjust the options in the context menu accordingly. You can also select the item in the event handler by adding it to the Calendar.ItemSelection object.

Meppy

It seems that .NET Framework does not provide built-in support for stylus "hold-down" other than associating a context menu with a control, which menu gets displayed when the stylus is pressed and hold over the control. This action however doesn't really count as a mouse action as it seems. The control itself is never notified of this action and the Calendar events are not fired as a result.

The following scenario supplies a workaround for this limiation and provides you with the ability to control whether and when to display the context menu.

1. Create a timer object (make it a member of the form, which contains the Calendar control).

private Timer timer;
// ...

// Somewhere during initialization
timer = new Timer();
timer.Interval  = 500;
timer.Enabled = false;
timer.Tick += new EventHandler(OnTick); 

2. Declare another member variable of type Point. We will use this variable to store the position of the mouse when the user initiates a click within the control.

private Point mouse; 

3. Handle the MouseDown, MouseMove and MouseUp events of the Calendar control. The following source code illustrates the contents of each of the event handlers.

MouseDown handler contents:

// Remember the mouse position
mouse = new Point(e.X, e.Y);

// Start the timer
timer.Enabled = true; 

MouseMove handler contents:

// Since the user has moved the mouse, we can
// assume it is not a "hold-down" action.
// Stop the timer then
timer.Enabled = false; 

MouseUp handler contents:

// Stop the timer as well
timer.Enabled = false; 

Implement the Timer.Tick event handler. The event handler should be invoked 0.5s after the timer has been started, i.e. 0.5s after the user has pressed the stylus, holding it down without moving it. We presume that the 'calendar' variable identifies the PocketPlanner instance and that there is a context menu referenced by the 'contextMenu' variable.

private void OnTick(object sender, EventArgs e)
{
    // Stop the timer (to avoid this event being raised more than once)
    timer.Enabled = false;

    // Cancel the current drag operation within the Calendar
    calendar.ResetDrag();

    // Make any necessary checks here. For example
    // you can check whether the mouse is positioned
    // over an item by calling Calendar.GetItemAt and
    // passing 'mouse' to it. You can enable or disable
    // various items in the context menu as a result of the checks here

    // Finally display the context menu
    contextMenu.Show(calendar, mouse);
} 

I hope this helps.

Meppy

Just handle the Calendar.ItemClick event as you would do normally and disable the timer right away to prevent the timer's event handler from being invoked. Like this:

timer.Enabled = false; 

Then continue processing the ItemClick event handler the normal way without worrying about context menus.

Meppy

P.S.: There were some mistakes in my previous post above that were fixed.

Ok, fixed it using the calendar.Click event instead of the ItemClick. This event doesn't fire on a hold-down.

Then in the Click event I use the GetItemAt() to check if an item is clicked.