How to change the Appointment Height to fit the text inside subject

Hi,

I took another look at your sample and I think I was confused. Your original post said

"I want to diplay a Multiline subject :

I used a customfilter to do that supplied earlier in this site."

So I assumed your sample was already doing this, but apparently, it's doing something else.

So I changed around the CreationFilter to more correctly size the AppointmentUIElement based on the text, accounting for the borders.

public void AfterCreateChildElements(UIElement parent)
        {
            if (parent is TextUIElement)
            {
                var textElement = (TextUIElement)parent;

                if (textElHeight == -1)
                {
                    textElHeight = textElement.Rect.Height;
                }
                var appointmentElement = textElement.GetAncestor(typeof(AppointmentUIElement))
                                                            as AppointmentUIElement;

                if (appointmentElement == null || textElement.IsTextFullyVisible)
                    return;

                SizeF size;
                using (Graphics g = textElement.Control.CreateGraphics())
                {
                    size = DrawUtility.MeasureString(g, textElement.Text, textElement.Control.Font);
                }

                var borderWidths = DrawUtility.CalculateBorderWidths(appointmentElement.BorderStyle, appointmentElement.BorderSides);

                size.Width += borderWidths.Left + borderWidths.Right;
                size.Height += borderWidths.Top + borderWidths.Bottom;

                int padding = 5;
                size.Width += padding;
                size.Height += padding;

                appointmentElement.Rect = new Rectangle(
                    appointmentElement.Rect.X,
                    appointmentElement.Rect.X,
                    (int)Math.Ceiling(size.Width),
                    (int)Math.Ceiling(size.Height)
                    );

                textElement.Rect = appointmentElement.Rect;
                textElement.WrapText = true;
                textElement.MultiLine = true;
            }
        }

But as I mentioned early, what you are trying to do here is incredibly complex and difficult and this code is not going to work right. Already I can see a problem in your sample that the appointment on the bottom is running outside the borders of the owner. So that's an issue you would have to deal with and that's going to be very difficult. And this sample doesn't even have any adjacent or overlapping appointments, so that's going to make it even more complicated.

Frankly, even for someone who is intimately familiar with CreationFilters and UIElements, it would require a huge amount of time and effort to achieve what you want here.