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MOCTimer ​

This event is triggered periodically each 55ms while the application is in idle state. It makes it possible to call procedures periodically. Another application is delayed execution.

Parameters ​

ParameterDescription
none

Exit value: ​

none

Remarks ​

See Also ​

Example ​

Let a class "Clock" have a class attribute "Time" of type STRING. We use the "MOCTimer" event to periodically write the current time into that class attribute

leo-grammar

ON_EVENT "MOCTimer" {
    CC "Core" GET_CLASS_ID classname:"Clock"
    CC "Core" GET_ATTR_ID classid:(classid) attrname:"Time"
    CC "Application" GET_DATE_TIME time-format:"HH:MM"
    CC "Core" SET_ATTR_VAL objid:(classid) attrid:(attrid) val:(time)
}

ON_EVENT "MOCTimer" {
    CC "Core" GET_CLASS_ID classname:"Clock"
    CC "Core" GET_ATTR_ID classid:(classid) attrname:"Time"
    CC "Application" GET_DATE_TIME time-format:"HH:MM"
    CC "Core" SET_ATTR_VAL objid:(classid) attrid:(attrid) val:(time)
}

Now we define a GraphRep which reads the Time class attribute and displays it as a simple analog clock

leo-grammar
GRAPHREP sizing:asymmetrical
SHADOW off
PEN w:0.15cm color:$207060
FILL color:$70c0b0
ELLIPSE x:0cm y:0cm rx:2cm ry:2cm
AVAL set-default:"10:03" time:"Time"
SET zwopi:6.2831853
SET h:(set(v, VAL copy(time, 0, 2)), cond(v >= 12, v - 12, v))
    m:(VAL copy(time, 3, 2))
SET dm:(m / 60) dh:((h ** 60 + m) / 720)
LINE x1:0cm y1:0cm
     x2:(sin(dh ** zwopi) ** 1.4cm) y2:(-cos(dh ** zwopi) ** 1.4cm)
LINE x1:0cm y1:0cm
     x2:(sin(dm ** zwopi) ** 1.8cm) y2:(-cos(dm ** zwopi) ** 1.8cm)
GRAPHREP sizing:asymmetrical
SHADOW off
PEN w:0.15cm color:$207060
FILL color:$70c0b0
ELLIPSE x:0cm y:0cm rx:2cm ry:2cm
AVAL set-default:"10:03" time:"Time"
SET zwopi:6.2831853
SET h:(set(v, VAL copy(time, 0, 2)), cond(v >= 12, v - 12, v))
    m:(VAL copy(time, 3, 2))
SET dm:(m / 60) dh:((h ** 60 + m) / 720)
LINE x1:0cm y1:0cm
     x2:(sin(dh ** zwopi) ** 1.4cm) y2:(-cos(dh ** zwopi) ** 1.4cm)
LINE x1:0cm y1:0cm
     x2:(sin(dm ** zwopi) ** 1.8cm) y2:(-cos(dm ** zwopi) ** 1.8cm)

All objects of class "Clock" always display the current time now, i.e. a change of the current time (which happens every minute) instantly updates the symbol on the drawing area.

(see: MOCTimer.png)