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Event-Driven Programming



Concepts

What Are Events?
Event Structure Components
Notify and Filter Events
Using Events in LabVIEW
User Events

How-To

Adding and Duplicating Event Cases
Available Events
Configuring Events Handled by the Event Structure
Creating User Events
Dynamically Registering Events
Finding a Control Associated with an Event Case
Locking Front Panels
Caveats and Recommendations when Using Events in LabVIEW

Avoid Placing Two Event Structures in One Loop
Avoid Using an Event Structure Outside a Loop
Handling a Latched Stop Boolean Control in an Event Structure
Make Sure You Have a Register For Events Function for Each Event Structure
One Case Handling Multiple Filter Events
One Case Handling Multiple Notify Events
Prompting Users with Dialog Boxes in a Mouse Down? Event Case
Use Events for Direct User Interaction Only
Using Events versus Using the Wait for Front Panel Activity Function
Using Events with Latched Boolean Controls
Using Events with Subpanel Controls

Event Reference

Control Class

Drag Ended
Drag Enter
Drag Leave
Drag Over
Drag Source Update
Drop
Key Down
Key Down?
Key Repeat
Key Repeat?
Key Up
Mouse Down
Mouse Down?
Mouse Enter
Mouse Leave
Mouse Move
Mouse Up
Shortcut Menu Activation?
Shortcut Menu Selection (App)
Shortcut Menu Selection (User)
Shortcut Menu Selection? (App)
Value Change
GraphChart

Plot Attribute Change
Scale Range Change
WaveformGraph

Cursor Grab
Cursor Grab?
Cursor Move
Cursor Release

IntensityGraph

Cursor Grab?
Cursor Move
Cursor Release

IOName
ListBox

Double Click
Drag Starting
Drag Starting?
Edit Cell
Edit Cell?

MulticolumnListbox

Double Click
Drag Starting
Drag Starting?
Edit Cell
Edit Cell?

Splitter

Mouse Down
Mouse Down?
Mouse Enter
Mouse Leave
Mouse Move
Mouse Up

String

Drag Starting
Drag Starting?
ComboBox

TreeControl

Double Click
Drag Starting
Drag Starting?
Edit Cell
Edit Cell?
Item Close
Item Close?
Item Open
Item Open?

Application Class

Application Instance Close
Application Instance Close?
Timeout
NI Security User Change

Pane Class

Mouse Down
Mouse Down?
Mouse Enter
Mouse Leave
Mouse Move
Mouse Up
Pane Size
Shortcut Menu Activation?
Shortcut Menu Selection (User)

VI Class

Key Down
Key Down?
Key Repeat
Key Repeat?
Key Up
Menu Activation?
Menu Selection (App)
Menu Selection (User)
Menu Selection? (App)
Mouse Enter
Mouse Leave
Panel Close
Panel Close?
Panel Resize
Shortcut Menu Activation?

FacadeVI

Data Change
Direction Change
Display State Change
Exec State Change