Custom Control

[Phylum]

Okay, this may sound a little complex but, it's not really... I swear!

 

1. I have created a custom control

 

2. The control contains a property that is a class

 

3. I created a TypeConverter to persist the class info (basically it writes down the properties info in the windows form designer generated code)

 

4. The TypeConverter is a ExpandableObjectConverter which basically means on the property grid for the CONTROL the class shows up like Font or Size

 

5. Whenever you change a property of the CLASS it raises an event. The CONTROL handles the event by Invalidating itself (forcing a redraw).

 

*** I have attached an image of what I am talking about. ***

 

The class contains visual properties for the control, for instance ForeColor. If I change the forecolor it should fire the event and the control should handle the event by redrawing itself at design time... the problem is it does not.

 

Anyone know of a solution?

Edited November 5, 2004 by Phylum

[PlausiblyDamp]

Any chance of posting the relevant code as well?

[Phylum]

Okay here is hopefully a better explanation. The code is divided into 3 parts: the WinAppearance class, the BaseControl and my SuperLabel Control.

 

This is the event that is fired if any of the properties of the CLASS change:

 

    //Delegate declaration
     public delegate void AppearanceChangedEventHandler(object sender, System.EventArgs e); 

     //Event declaration
     public event AppearanceChangedEventHandler AppearanceChanged; 

     //The protected OnColumnAdded method raises the event by invoking the delegates. 
     //The sender is always the current instance of the class ("this" in C#, "Me" in VB)
     protected virtual void OnAppearanceChanged(System.EventArgs e) 
     { 
       
        if (AppearanceChanged != null) 
        { 
           AppearanceChanged(this, e); 
        } 
     
     } 

 

This is the code in the BaseControl that adds the WinAppearance class as a property:

 

     [Description("The appearance of the control"),
     Browsable(true),
     RefreshProperties(RefreshProperties.Repaint),
     Category("Appearance")]
     public WinAppearance Appearance
     {
        
        get
        {
           return _appearance;
        }

        set
        {
           _appearance = value;
           this.Invalidate();
        }

     }

 

Here is the code for the BaseControl that handles whenever the AppearanceChanged event (which the WinAppearance class raises) gets fired:

 

     private void _appearance_AppearanceChanged(object sender, EventArgs e)
     {
        this.Invalidate();
     }

 

The SuperLabel control just inherits from the BaseControl.

 

I hope this helps

Edited November 8, 2004 by Phylum