This example sets the "What's This?" Help text for the myAction QAction object to "Click this button to save the current file." This could be useful in a text editor application where the user needs to be reminded of what the "Save" button does. Package/Library: Qt Core (header: QAction) Example 2: Setting the "What's This?" Help text for a QAction object named "myAction" to a translated string using the tr() function.c++
This example sets the "What's This?" Help text for the myAction QAction object to a translated string using the tr() function. This allows the application to be easily translated into different languages. Package/Library: Qt Core (header: QAction) Example 3: Setting the "What's This?" Help text for a QAction object named "myAction" to some HTML-formatted text.c++ myAction->setWhatsThis("Click this button to save the current file."); ``` This example sets the "What's This?" Help text for the myAction QAction object to some HTML-formatted text. This allows the "What's This?" text to be formatted with bold, italics, or other HTML tags. Package/Library: Qt Core (header: QAction) In conclusion, the setWhatsThis function in the QAction class is used to set the "What's This?" Help text for the action, and it allows you to provide context-sensitive help to the user. This function is part of the Qt Core library.