4D v13
PV Get on event method
- 4D View Language
-
- PV Area
-
- PV Area, Introduction
- PV Area to blob
- PV BLOB TO AREA
- PV DELETE OFFSCREEN AREA
- PV EXECUTE COMMAND
- PV Get area property
- PV GET COMMAND STATUS
- PV GET LAST ERROR
- PV Get on command method
- PV Get on error method
- PV Get on event method
- PV New offscreen area
- PV ON COMMAND
- PV ON ERROR
- PV ON EVENT
- PV REDRAW
- PV SCROLL AREA
- PV SET AREA PROPERTY
- PV SET COMMAND STATUS
PV Get on event method
| PV Get on event method ( area ; event ) -> Function result | ||||||||
| Parameter | Type | Description | ||||||
| area | Longint |
|
4D View area | |||||
| event | Longint |
|
4D View event | |||||
| Function result | String |
|
4D method name | |||||
The PV Get on event method command returns the name of the method linked with the specified event callback.
The PV Event constants are used to define the event :
| Constant | Type | Value |
| pv on active cell changed | Longint | 8 |
| pv on cell value changed | Longint | 9 |
| pv on clicked | Longint | 2 |
| pv on column resize | Longint | 12 |
| pv on column sort | Longint | 14 |
| pv on contextual click | Longint | 15 |
| pv on double clicked | Longint | 4 |
| pv on drag | Longint | 10 |
| pv on drop | Longint | 11 |
| pv on getting focus | Longint | 0 |
| pv on keyboard | Longint | 6 |
| pv on losing focus | Longint | 1 |
| pv on right clicked | Longint | 3 |
| pv on row resize | Longint | 13 |
| pv on scrolled | Longint | 5 |
| pv on selection changed | Longint | 7 |
If no method has been linked to an event, PV Get on event method returns an empty string.
It is wise to temporarily disable an on event call and execute a process before re-establishing the original call.
Here is a simple method that generates this "disengagement" in a generic manner using PV Get on event method, for example, for the pv on cell value changed event:
C_STRING(32;$EventMethod)
`Save the method that may be in place
$EventMethod:=PV Get on event method(Area;pv on cell value changed)
PV ON EVENT(Area;pv on cell value changed;"") `Cancellation
`... Put the process to execute here
PV ON EVENT(Area;pv on cell value changed;$EventMethod) `Restore
Product: 4D
Theme: PV Area
Number:
15993
Created: 4D View 6.8
PV Get on command method
PV Get on error method
PV ON EVENT
