Weird behavior of ListField on touch devices
Hello!
I have a custom ListField, who has a weird behavoid on palpable devices like the torch and storm. I try to move it with my fingers but it does weird things. If it happened to someone else?
Thank you!
My code is:
public class FancyList extends ListField implements ListFieldCallback, Runnable, ItinetoursResource {
private Vector rows;
private Vector rutas;
private String[] tags;
private String[] avatars;
private Bitmap[] fotos;
private ResourceBundle res;
private int fotoActual=-1;
private static final int rowHeight=70;
public FancyList(Vector rutas) {
super(0, ListField.MULTI_SELECT);
this.rutas = rutas;
setRowHeight(rowHeight);
res = ResourceBundle.getBundle(BUNDLE_ID, BUNDLE_NAME);
setEmptyString(res.getString(FANCY_LIST_NINGUN_TOUR_ENCONTRADO), DrawStyle.HCENTER);
setCallback(this);
avatars = new String[rutas.size()];
tags = new String[rutas.size()];
fotos = new Bitmap[rutas.size()];
for(int i=0; i
As far as I KNOW, the mechanism of scrolling, you talk about work out of the box with a standard ListField. Have you tried to use a ListField standard to see if you can make it work?
I suspect that your code passes very slowly, because of the significant workload in the painting of each line. I think that if you've tried this code on a trackpad device, you would have problems scrolling too, have you actually tried on another device?
With regard to obtaining click events working on a ListField, you can find the following useful code. Using this, you can add a FieldChangeListener to the ListField and it will go through standard fieldChanged code when it is selected.
/**
* Simple extension of the ListField designed to
FieldChangeListener disk on "click here".
*
To examine the methods of field substituted here for more information.
*/
Import net.rim.device.api.ui.component.ListField;
Import net.rim.device.api.ui.TouchEvent;
SerializableAttribute public class ClickableListField extends {ListField
public ClickableListField (int numberOfRows) {}
Super (numberOfRows);
}
protected boolean navigationClick (int status, int time) {}
this.fieldChangeNotify (2);
Returns true;
}
protected boolean touchEvent (TouchEvent message) {}
If click process changed field
If (message.getEvent () == TouchEvent.CLICK) {}
this.fieldChangeNotify (2);
Returns true;
}
Return super.touchEvent (message);
}
}
Tags: BlackBerry Developers
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So, I thought about it all now (finally).
I write (once again) the answer so that anyone trying such a feat in the future will not have to go through what I went through.
It's all in one (SINGLE - well, kinda simple) line of code. It must be longer we had to find a way to do something that actually had a line of code! Well, it's here:
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And this is probably one of the longest lines of code without spaces, you will ever see.
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CATEGORY TREE FUNCTIONS
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You cannot delete a category with groups inside that you could cause serious harm to the database and people would go "missing".
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captureCatTreeSettings();
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And my categories_list_http HTTPService tag looks like:
And my cat_tree tag tree looks like:
Wow! It's as simple as that. The key lies in the '... ' descriptor (descending). E4X is actually pretty cool when you start to get the hang of it.
Talk about a learning curve, it's probably best classified as learning 'right angle '. I'm glad that I took the time, I got to understand that, because I learned a LOT on the way.
Well well, hope that helps someone in the future.
Above and outside - Taka
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