Re: [wxGlade] Layout not updated until a resize.

[Marco B. <mar...@ve...>]

On Fri, 2 Aug 2002 16:43:05 +0200, Alberto Griggio
<al...@ti...> wrote:

>> I saw that now a lot of widgets have the same properties so we have
>> the same code in a lot of file, how could we avoid this? My only idea
>> is to modify classes derived from Property to handle access functions
>> directly.
>
>This is the price to pay for widget independence, i.e. to keep each 
>widget as much isolated as possible from the others, so that it can be 
>added/removed without pain. 
>Anyway, we could use an approach similar to the one or CheckBox, 
>RadioBox, RadioButton, which all share the same ChoicesProperty, but I 
>think this is not possible for all cases (i.e. there are properties 
>which are quite similar but not identical)

Why not something like this?

class MyWidget(ManagedBase):
    def __init__(self, ...):
        ManagedBase.__init__(...)
        TextProperty(self, 'text')
        ...
    ...

Where TextProperty is:

class TextProperty(Property):
    def __init__(self, widget, name, initial=''):
        widget.access_functions[name] = self.get, self.set
        widget.properties[name] = self
        self.widget = widget
        self.value = initial

    def set(self, value):
        value = str(value)
        if value != self.value:
            # [...] undo code
            self.value = value
            if self.widget.widget:
                self.set_widget_value()

    def set_widget_value(self): 
        self.widget.widget.SetText(self.value)

This is completely compatible with the old code.
I modified EditButton and wxGLade works perfectly, you can find this
version at http://spazioweb.inwind.it/marcobari/tmp/button.py.

-- 
Marco Barisione (ICQ 84277092)