Java Development

[guillemmat]

Hello all,

I'm extending Field to create my customfield which is intenteded to show an image using all the screen available space. With that i mean that i'm looking to get my field use all available height and width, so if i have a title bar, it should use the screen height minus the title bar.

The problem is i don't know how to exactly accomplish that. I guess it has something to do with setextent and layout, but i don't know if there is some way the get the available screen height and width on the field itself or i have to pass them from the manager (which would not be my preferred solution).

Thanks!

[RexDoug]

You can use Display.getHeight() and Display.getWidth() to determine the amount of available real estate on the screen.

You'll then want to override getPreferredHeight() and getPreferredWidth() in your Field implementation.

[guillemmat]

But if i'm not mistaken Display.getHeight() and Display.getWidth() return the total size of the screen and not the available one. So if i have a title bar of 30px height and i call Display.getHeight() on a 360px height screen, Display.getHeight() will not return 330px, will return 360px, so my field will be bigger than available space on the screen. I am right or Display.getHeight() will return a different size inside a field?

Any other ideas?

Thanks

[maadani]

Hi @guillemmat

Try the following:

1. Let your field extend Vertical Field Manager.

2. Pass USE_ALL_WIDTH & USE_ALL_HEIGHT in the call to the super in the constructor.

3. Set the image as a background:

setBackground(BackgroundFactory.createBitmapBackground(bitmap, Background.POSITION_X_LEFT, Background.POSITION_Y_TOP, Background.REPEAT_SCALE_TO_FIT);

Hope that helps,

E.