sequence Manager custom; What happens when?

The page on screen mentioned using a Manager custom value USE_ALL_WIDTH and height, on a full screen, in order to get the screen of the device width and height without a signed key and without using deprecated code. I did it and it works. So I can set some static class and use these values throughout my program. All other class modules use the values very well.

I have another custom Manager, in the same class as well as the first. He must know the width of the screen. Now, even if I am the creation and initialization of the class of ScreenInfo first, Member in the constructor of the class, the value of screen width is not available at the moment where the second Manager needs.

Someone could enlighten me on this timing issue and let me know if there is a solution? Thank you

Your sublayout must do much, much more than that. It is a centerpiece of any custom layout manager. It should say each field in the provision itself, choose positions for its fields and calculate and define its scope (size).

Here are some articles to the knowledge base for beginners:

The extension Manager

Create a custom for a screen Manager (check the review here)

As for where to add updateLayout: inside your sublayout, by checking if the sizes are already calculated (fields that have not been built before have their widths and heights 0). However, this is not a good approach at all. Better be used correctly the width and height in the sublayout as parameters, exposes the fields in the order you want, their demand for their size after that (if you call layoutChild first and then ask the child about its width and its height) and set their positions accordingly.

It is not an easy task, unless you implement something totally obvious (for example, reimplement a VerticalFieldManager, well that even if this can easily go wrong if you're not careful).

Here are a few examples of very good but quite complicated:

Managers, the fields and advanced buttons

Good luck!

With respect to appellant layout in the layout - wrap your updateLayout() in invokeLater to the schedule until after that your sublayout finishes the job.

Tags: BlackBerry Developers

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