Ask field repositioning and screen layout reset

Hello!

I am confronted with 2 questions:

1. I have a table constructed using ListField and there are cases where the width of the table is longer than the width of the screen of the device. For this reason, I want to move the table to the left or the right. I do it by keeping a variable shiftX and on navigationMovement I increase / decrease this shiftX with a positive / negative. Then this variable shiftX is used in Manager of ListField in sublayout by calling the setPositionChild method. I have to ask the Manager of re-paint call manager.invalidate () once I set variable shiftX. The problem is that manager.sublayout () is not called upon in this case. To force repaint them (and sublayout), I delete the ListField, add it back anf then call manager.invalidate (). But this solution seems ugly to me and it slightly affects the user experience as X-moving is a little laggy.

2. by the first question:

The manager that contains the ListField has following structure:

HorizontalManager - where I put a colorful header.

Label - text

Table - created using ListField

The scope of the list is vertical scollable and if I scroll to the last line, the screen only shows me the last line only (due to the scrolling). If I scroll to the first line I see the first line of the table, but I can't see the HorizontalManager (the screen header) and the label, only the ListField. I tried to make it the active HorizontalManager, but it does not help also. The only solution that works (gets me to the initial state) is to remove the listfield, add it again and then call manager.invalidate (). But once again, it seems ugly and hacky. What are my options?

Kind regards

Gunnar

1. I did something similar, but I actually dealt with the shiftX in my drawListRow. In the case that I had, the data were given text, then I moved to left and right a character at a time, although of course I could have painted the drawListRow on a Bitmap and then moved to the pixel with a treatment at the time.

2. the best way I think is to have the 'head' in a part not scrolling and scrolling of the Table, so that the header is still visible. If this isn't what you want, then put a Null field above you HorizontalFieldManager. He is active, so will take focus, so the screen scrolls upward. A hack, but I still think a hack better remove the ListField. You can also make the active header.

Tags: BlackBerry Developers

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What is the best way to manage fields on a screen to draw in paint () or manage through managers and their layout() method?

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Hi people,

in my application, there are two screens:

-screen--> a listfield with several check box and button

-screen B

Users can select the checkboxes and can push a button that call anti-pop method with new screen B as an argument. When users escape in screen B key, it automatically returns to A screen with already activated checkboxes.

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I hope that I explained

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Kind regards!

F.F.: Sorry for my English

Try like this example:

Example of display:

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{
    public Def()
    {
        createGUI();
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}

and the popupScreen is:

public class SamplePopupScreen extends PopupScreen
{
    Def def;
    public SamplePopupScreen(Def def)
    {
        super(new VerticalFieldManager());
        this.def=def;
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    }

    private void createGUI()
    {
        add(new LabelField("Popup Screen",Field.FIELD_HCENTER));
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    {
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        def.createGUI();
        def.invalidate();
        UiApplication.getUiApplication().popScreen(this);
        return super.onClose();
    }
}

Enter something in the edit field, and then press the click to see the difference that the screen is reset or not;

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Ask field repositioning and screen layout reset

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