Enforce control width or height?

Question

I have a control for which I need to enforce a certain Width or Height, depending on a property called Orientation, which, obviously can be Vertical or Horizontal.

So if the Orientation property is Vertical, then the Width must always be 2.
If the Orientation property is Horizontal, then the Height must always be 2.

I have tried many things including MaximumSize, but none of them seem to work well enough.
As an example... A single-line TextBox (With Multiline set to False.)?

Answer 1

These are the steps:

1. Implement a designer for the control by creating an empty class that inherits from ControlDesigner.
2. In this designer class, override the SelectionRules property and return whatever rules you want to use for your control; for example, set left- and right-sizeable only if you want to forbid vertical resizing.
3. Attach the designer to your control by decorating your control class with the DesignerAttribute, and referencing your designer class in the constructor of the attribute.

Answer 2

Is this a custom user control? If so, you can build this logic into the Orientation property.

If it is a custom control, then you could write the Orientation property such that the set method checks value (which would be either Vertical or Horizontal) and then quietly sets Width/Height accordingly. In that same set method you could also update two bool fields, like dontLetUserSetWidth and dontLetUserSetHeight, depending on value.

Does this look helpful? I'm sorry if I didn't read your question right!

Answer 3

As an example... A single-line TextBox (With Multiline set to False.)

Considering this specific example, with multiline set to false, you will have to explicitly handle the Multiline Mode when the Vertical figure changes.