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PySide GUI Application Development by Venkateshwaran Loganathan

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Adding a button

The next customization is to add a button to our application. The most common button used in any GUI is a push or command button. We push (click on) the button to command the computer to perform some action or answer a decision. Typical push buttons include OK, Apply, Cancel, Close, Yes, No, and Help. Usually the push button is rectangular with some label on it. It can also have an optional icon associated with it. It is also possible to define a shortcut key combination to the button to which it responds on clicking the key combination.

The button emits a signal when it is activated by any external event, say, mouse click or by pressing the spacebar or by a keyboard shortcut. A widget may be associated with this key click event ...

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