maandelikse Argiewe: Mei 2013

Vinnige en maklike: Stel die grootte van 'n Items in 'n lys Box in 'n Windows Store App

In 'n Windows Store App ek skep, Ek wil die gebruiker verskeie inligting boodskappe te wys.  Ek pluk 'n ListBox as die instrument om dit te wys, sodat hulle kan blaai deur hulle en almal wat goeie dinge. 

Die boodskappe is die inligting net, so there’s no need to provide all that extra whitespace around them since the user can never select them for anything.  The default behavior of the ListBox provides a substantial amount of padding and I wanted to get rid of it.  Well …. you can’t do that sort of thing on the ListBox directly.  HOWEVER, you can do it to the items you add:

        private nietig AddGameStateLogMessage(string theMessage)
        {
            TextBox t = nuwe TextBox();
            t.Text = GameStateCounter   + ": " + theMessage;
            t.TextWrapping = TextWrapping.Wrap;
            t.MinWidth = 400;
            Dik thisPadding = nuwe Dikte(5, 0, 5, 0);
            t.Padding = thisPadding;
            t.FontSize = 12;

            ListBoxItem dat = nuwe ListBoxItem();
            li.Content = t;
            li.MaxHeight = 25;
            thisPadding = nuwe Dikte(5, 0, 5, 0);
            li.Padding = thisPadding;

            GameStateLog.Items.Insert(0,li);
        }

in the above, I’m creating a TextBox and setting its font, its padding, ens..

Volgende, I create a ListBoxItem and set its content to the formatted TextBox.

Ten slotte, I insert the ListBoxItem into the ListBox.  (I want to show most recent messages at the top of the list, hence the Insert(0,li) instead of a simple Add() invocation.).

I will be tweaking this a bit before I’m really happy with the ListBox behavior but the pattern shown above has been very fruitful.  Hopefully someone else finds it helpful.

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