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vrf GlobalMajic Strip Chart ActiveX

Question asked by VRFuser on Nov 10, 2002

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Hi Barrie,
          Sorry you dod not have any replies to your question. For your
interest I have used the TeeChart graph which ( so I understand ) is the
graph object supplied with Borland's Delphi. You can definitely send an
array of data to this object.

As far as I understand you should not have to worry about the variant type
- just set up and array in VEE and pass that as the parameter. The only
hesitation I would have there is you mentioned 'longs' i.e. integers - I
would have expected a graph object to accept real numbers?

Good Luck,

Mike Watts

_______________________________________________________________________

Michael J. Watts Consultant                               PO Box 92
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e-mail: MikeJWatts@CompuServe.Com                             Devon
tel: 07714 339 729                                          EX4 2YY
_______________________________________________________________________

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bwalden Oct 24, 2002 8:50 AM

Hi folks,

Are any of you using GlobalMajic's Strip Chart ActiveX object with Vee
and if so, have you figured out how to provide an array of data? The
Strip Chart works great with single pairs of data (time and value in
real time) but its also possible to feed it an array of time/value pairs
and have it plot the entire collection. Unfortunately, providing the
array to the AddXYArray() method is more difficult than it appears.
Help anybody?

Barrie
whoi

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bwalden Nov 9, 2002 3:33 AM

Hi folks,

A couple of weeks ago I asked if anybody knew how to send an array of
data to a Globalmajic strip chart ActiveX object. Nobody replied which
is surprising since this particular ActiveX is extremely useful and I
can't believe I'm the only one working with it. More importantly
perhaps, the GlobalMajic objects seem to be well established ActiveX
components and Vee should not have any problem using them. Admittedly,
I might be doing something stupid but perhaps there is something strange
in the way Vee passes variant data to and from ActiveX objects. The
strip chart wants an array of "longs" passed as a variant. Everything I
have tried leads to a "type mismatch" error. Here are the syntax notes
provided by the "help" file:

Visual basic
     stripchart.AddXYArray(Index as integer, as array )
C/C++
     void stripchart.SetAddXYArray(short Index, VARIANT* ARRAY )
Delphi
     stripchart.AddXYArray [:= short Index, VARIANT* ARRAY ]

The first item is the "pen" identifier; its the array of data that's
causing the problem. Is this enough for anybody to guess how this
method can be used with Vee?

For the record, I am using a number of the Globalmajic objects with Vee
and this is the first problem I have encountered. Even the strip chart
works well if you send XY data pairs individually.

Barrie
whoi

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2 Replies

bwalden Oct 24, 2002 8:50 AM
Mark Correct
Correct Answer
Hi folks,

Are any of you using GlobalMajic's Strip Chart ActiveX object with Vee
and if so, have you figured out how to provide an array of data? The
Strip Chart works great with single pairs of data (time and value in
real time) but its also possible to feed it an array of time/value pairs
and have it plot the entire collection. Unfortunately, providing the
array to the AddXYArray() method is more difficult than it appears.
Help anybody?

Barrie
whoi

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bwalden Nov 9, 2002 3:33 AM
Mark Correct
Correct Answer
Hi folks,

A couple of weeks ago I asked if anybody knew how to send an array of
data to a Globalmajic strip chart ActiveX object. Nobody replied which
is surprising since this particular ActiveX is extremely useful and I
can't believe I'm the only one working with it. More importantly
perhaps, the GlobalMajic objects seem to be well established ActiveX
components and Vee should not have any problem using them. Admittedly,
I might be doing something stupid but perhaps there is something strange
in the way Vee passes variant data to and from ActiveX objects. The
strip chart wants an array of "longs" passed as a variant. Everything I
have tried leads to a "type mismatch" error. Here are the syntax notes
provided by the "help" file:

Visual basic
     stripchart.AddXYArray(Index as integer, as array )
C/C++
     void stripchart.SetAddXYArray(short Index, VARIANT* ARRAY )
Delphi
     stripchart.AddXYArray [:= short Index, VARIANT* ARRAY ]

The first item is the "pen" identifier; its the array of data that's
causing the problem. Is this enough for anybody to guess how this
method can be used with Vee?

For the record, I am using a number of the Globalmajic objects with Vee
and this is the first problem I have encountered. Even the strip chart
works well if you send XY data pairs individually.

Barrie
whoi

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