Setvalidating

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The simplest way to define your error message is to use the string (as in this example) but you can also used localized error messages by specifying either a resource type and resource name or a lambda expression. To use the new custom validator you can call Set Validator when defining a validation rule.

setvalidating-39

Text can be selected with set Selection() or select All(), and the selection can be cut(), copy()ied and paste()d. When the text changes the text Changed() signal is emitted; when the text changes other than by calling set Text() the text Edited() signal is emitted; when the cursor is moved the cursor Position Changed() signal is emitted; and when the Return or Enter key is pressed the return Pressed() signal is emitted.When editing is finished, either because the line edit lost focus or Return/Enter is pressed the editing Finished() signal is emitted. When you sign in to comment, IBM will provide your email, first name and last name to DISQUS.For example, preventing a user from entering letters into a text field that expects a number makes it clearer what is needed.In addition to this the colour of the text field can be changed to provide the user with a visual feedback, e.g.

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