Navigation:  How to Work with Screens > Associating Events to a Screen or an Object

 

Overview

 

An event is a specific action performed by the device operator, which triggers actions within the application. These actions, which are defined by the programmer, are designated, in the MCL-Designer environment, as processes. See Adding and Editing Processes.

There is always a default event associated to a screen ("On Validate") or an object (depending on the object).

Events can be added to a screen. However, only some objects allow for the addition of events.

 

 

List of Events available:

 

On Change

On Click

On Hotkey

On Ready

On Validate

On RFID Tag Read (See On RFID Tag Read)

On Power

On Timer - This event is an exception. It occurs due to the "lack of activity" on the part of the device operator. It triggers an action (process) after a specified time frame.

On Button # - This event is only associated to the "Advanced List Box" object, if the object contains button elements in its style.

 

 

For more information regarding the events associated to either screens or objects refer to:

 

Events Associated to Screens

 

Events associated to Objects

 

 

To Add Events

 

Step-by-step

 

1. Go to the "Actions" tab of either Screen or specific Object (in the "properties" window").

 

The image below illustrates all the steps to take when adding an event.

 

 

2. Click (at the bottom of the "Actions" tab) and open an edition window.

 

If the option is not present in the "Actions" tab, that means other events cannot be added. You can only add processes to the default event. See Adding and Editing Processes.

 

 

3. In the "On Action" box, select an event from the drop-down list.

 

Remember that not all the events are available in each Screen or Object. The drop-down list varies according to the element (screen or specific object) that is receiving the event.

 

 

4. The "Do" option offers several target locations to advance the application to (ex: "Next Screen"; "Exit" or even a specific routine). Either select a destination from the drop-down list or click and select one of the options available in he "Branch to" window. If you select from the list, click to apply your choice and return to the edition window.

 

If you intend to add processes to this event, select the "<Action>" option. See Adding and Editing Processes.

 

 

5. In the edition window, click to apply your options.

 

All of the events (whether default or added ones) are displayed in the tree view (in the "Programs" module).

 

If you right-click an event, displayed in the tree view, you access the following menu:

 

 

Double-clicking an event opens the "properties" window of the element (screen or object) it is inserted in, directly in the "Actions" tab. This enables the adding of processes to that event. See Adding and Editing Processes.