How to develop BlackBeery Ui

I want to develop the UI for a screen which I join... on ehelp me please to write code for the user interface

akhilmuppa wrote:

Main box is a text box, and it will scroll vertically and horizontally...

Yes, really, I have problem with header, I've tried in many ways with many managers, but it does not display the two textfielld and button .so please help me solve this problem... As I referred to it a few docs but I force get the solution

OK, then you create your screen with both VERTICAL_SCROLL and HORIZONTAL_SCROLL flags. The main area Manager (which is not directly visible to you if you can get the reference through getMainManager) is a VerticalFieldManager, so it will hold the fields vertically (duh!). However, thanks to the HORIZONTAL_SCROLL indicator, it will allow wider than the screen fields to get what they want and will be able to scroll horizontally - either programmatically (setHorizontalScroll) or 'naturally' when the focus moves outside the visible area.

As for the problem with the textfield and button, there are two ways to solve it.

For example, if you searched "width-hungry" as I suggested, you would have found, for example, this thread:

EditField and checkboxfield on the same line

Take a look at the solution - it's one of the ways to do so: simply create a field that will be limited to how much of the piece.

The second solution would be to create a Manager customized for this particular configuration of TextField left and ButtonField right. The Manager will always have exactly two fields, in this exact order, so you can write his sublayout invoking it.

So, what does ' protected void sublayout (int maxWidth, maxHeight) ? It does the following things:

(1) receives the maximum width and height it can occupy in the parent Manager (see maxWidth and maxHeight parameters);

(2) tells the Manager (managed fields) how room child within this handler they can get (using layoutChild (child of field, int height, int width)). After that (and only after that) he knows how this child will be actually using child.getExtent (any form) or (if you want width and height separately) child.getWidth()/child.getHeight (). It is normal that any Manager to expose a child, get its dimensions, adjust the width and height according to the remaining information then continue carrying the children in the same way.

(3) positions of its children using the setPositionChild (child field, int x, int y) call. Positions are relative to its upper-left corner (which is (0,0)).

(4) calculates the height and width that result and sets using setExtent (int width, int height).

Try to write the handler using these data as well as the link provided Simon and come back here if you still have problems. By the way, take a look at sublayout to JustifiedEvenlySpacedHorizontalFieldManager for a good example.

Tags: BlackBerry Developers

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