Copying and pasting text from one Line Edit widget to another

This recipe will make you understand how an event performed on one widget invokes a predefined action on the associated widget. Because we want to copy content from one Line Edit widget on clicking the push button, we need to invoke the selectAll() method on the occurrence of the pressed() event on push button. Also, we need to invoke the copy() method on occurrence of the released() event on the push button. To paste the content in the clipboard into another Line Edit widget on clicking of another push button, we need to invoke the paste() method on the occurrence of the clicked() event on another push button.

Getting ready

Let's create an application that consists of two Line Edit and two Push Button widgets. On clicking the first push button, the text in the first Line Edit widget will be copied and on clicking the second push button, the text copied from the first Line Edit widget will be pasted onto the second Line Edit widget...