CODEWITHSUNDEEP
c#winformsfontsclass
DRapp
DRapp

Reputation: 48169

Subclassed Textbox readonly font not recognized on form

Building my baseclasses for user interface controls is getting there. I have command buttons derived with custom font assignment and put on a form, all is fine... However, identical code for the read-only property Font of a textbox is NOT recognized properly on the same form. It is ONLY taking the setting of the FORM and disregarding its own Font declaration.

public class MyTextbox : TextBox
{
    [ReadOnly(true)]
    public override Font Font
    { get { return new 
             Font( "Courier New", 12f, FontStyle.Regular, GraphicsUnit.Point ); 
          } 
    }
}

Upvotes: 0

Views: 582

Answers (2)

DRapp
DRapp

Reputation: 48169

With a help from "nobugz" (Thanks), I found this same failure when doing a ComboBox too. My result was the following...

My getter

get { return new Font( ... ); }

However, in nobugz response, something wasn't working quite right with the compiler, so in the constructor of the class

clas MyTextbox...
{
   public MyTextbox()
   {
      // it defaults itself from its own read-only font "new" object instance and works
      base.Font = Font;
   }
}

Upvotes: 0

Hans Passant
Hans Passant

Reputation: 942119

The Font property is an ambient property. If it was never assigned, it automatically matches the Font property of the container control. You never assigned it.

Do it like this:

public class MyTextbox : TextBox {
    Font mFont;
    public MyTextbox() {
        base.Font = mFont = new Font("Courier New", 12f, FontStyle.Regular, GraphicsUnit.Point);
    }

    [ReadOnly(true)]
    public override Font Font {
        get { return mFont; }
    }
}

Upvotes: 1

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