High-country-tek DVC80 Bedienungsanleitung PDF herunterladen (Seite 114)

P/N: 021-00154, Rev. A.6 - updated for V4.7 Tools Page | 114

The variables you use when displaying a screen are named:

GD.screen

GD.v1, .... GD.v24

GD.portrait A value of 1 = landscape, 2 = landscape rotated 180 degrees,

3 = portrait, 4 = portrait rotated 180 degrees. Zero the default = landscape.

GD.alarm This variable must be set first to true and then to false for each alarm

beep and be about 250ms apart. Here is example alarm code:

dim alarmtimer as timer

if (alarmtimer = 0) then

alarmtimer = 250ms

if (gd.alarm = false) then

gd.alarm = true

else

gd.alarm = false

end if

Step 4: Interacting with Objects being touched on the Display

The variables you use to sense and interpret the objects being touched on the display are:

GD.key

GD.value

GD.setting

When an object is touched that objects key field value (> 0 and < 100) is sent to your application and an audible

beep is sounded. The receipt of the key message by the DVC controller’s BIOS results in the GD.key variable

being set to true (> 0) and the GD.value variable being set to the object’s key value. The GD.setting variable is

set for those objects having multiple possible settings such as the Slider and the List Box objects. For these two

objects, GD.value identifies the slider or list box touched while the GD.setting is set to the slider value or the list

box line number selected. After you have processed receipt of the key value you should set the GD.key

variable to false (0). The DVC BIOS prevents another object touch from being received if the GD.key variable

has not been set to false. This mechanism insures that object touches are processed in the order they occur.

Example code is as follows:

If (GD.key) then

Value = GD.value ‘ GD.value is saved to value in case a new value is received before this one is

‘ completely processed.

Setting = GD.setting ‘ Slider object returns its position as well as its key value

‘ List Box object returns the entry line number selected as well as the object key

GD.key = false

‘ add code to process the value received

............

End if

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High-country-tek DVC80 Bedienungsanleitung Seite 114