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I want to place a TextField object on the form and that works fine. However, I'd like for the text field to take up the entire width of the screen and allow just one line of text. By default, it allows multiple lines of text.
You could set a limit on the number of characters that a user could input to limit the amount of text that can be entered. The amount that could be entered on a line would vary though based on the user's font size. You can calculate the size of a string in pixels for the given font by using the Font.getAdvance(string) method to find the exact size or to estimate the number of characters that can fit on the screen width.
Another approach that I used in the past is to first place the textField in a horizontalManager and set the extent of the manager to whatever size you have. This will allow you to control the size of the textfield using screen pixels.
