Computer Vision with OpenCV 3 and Qt5

User interaction and scripting in QML

Responding to user actions and events in QML code is done by adding scripts to slots of the items, in quite a similar way to Qt Widgets. The major difference here is that each signal defined internally within a QML type also has a corresponding slot for it which is automatically generated and can be filled with a script to perform an action when the relevant signal is emitted. Well, let's see this with another example. A QML Button type has a pressed signal. This automatically means that there is an onPressed slot that you can use to code the required action of the specific button. Here's an example code:

    Button 
    { 
      onPressed:  
      { 
        // code goes here 
      } 
    } 

For a list of available slots in QML types, you can ...