Description Angelo ZERR 2009-12-17 10:00:46 EST

I think it shoud be cool to create an interface IPropertyDescriptor like EMF.Edit org.eclipse.emf.edit.provider.IItemPropertyDescriptor interface.

This interface could be have several methods like : 

public interface IPropertyDescriptor
{

    String[] getSupportedPropertiesName();

    Object getPropertyValue(String propertyName);

    boolean isPropertySet(String propertyName);

    boolean canSetProperty(String propertyName);

    void resetPropertyValue(String propertyName);

    void setPropertyValue(String propertyName, String propertyValue);

}

After SWTElement can implement this interface to manage several things : 

1. SWTElement#getSupportedPropertiesName() returns the CSS properties name supported by the SWT widget wrapped. Ex : for SWT Text, this method returns ["background-color", "color"....]. This inofmration can be used :

1.1. by CSS engine to reset only the properties supported by the widget (today the whole properties are iterate to rested each properties for each widgets)

1.2 by a CSS editor (like WTP) to provide into Eclipse View Properties the CSS properties supported when we write Text {...}. Autocompletion could use this information too.

2. SWTElement#setPropertyValue(String propertyName, String propertyValue) to set CSS property. Ex : SWTElement.setPropertyValue("color", "red");

3. SWTElement#getPropertyValue(String propertyName) to get CSS property. Ex : SWTElement.getPropertyValue("color") returns "red"

4. SWTElement#isPropertySet(String propertyName) to know if the CSS property was setted. This method can be usefull to know if the property must be restede or not.

5. SWTElement#resetPropertyValue(String propertyName) reset a CSS property. This method can be used when CSS engine is reseted (for instance to load new CSS styles) or when dynamic styles (ex : Text:focus) must be applyed.

Regards Angelo