Layers on/off. Why so slow?

Report Inappropriate Content · 01-26-2003 04:36 AM

for each layer in AdView.Viewer.Layers
layer.visible=false
next

The above loop takes approx. 2 sec/100 layers in a VB-script, which I think
is too slow.
(Athlon XP1800+, 1.53 GHz)
Is it possible to speed it up in any way?

Regards

Per Savås

Report Inappropriate Content · 01-27-2003 12:25 AM in reply to: *Savås, Per

The WHIP! API allowed a calling program to specify a set of layers to turn
on or off, and WHIP! would turn them on or off in one fell swoop. The Volo
View Express API allowed the caller to turn layers on or off one layer at a
time. A Volo View Express newsgroup user pointed out the slowness of Volo
View Express in this regard. The rejoinder was that the Volo View Express
layer dialog could be resized. It reminded me of the "Dead Parrot Skit" from
Monty Python where I equated the resizability to beautiful plumage. If
history is any indication, I think the AEV API slowness in this regard is
that layers are processed one layer at a time.

"Per Savås" wrote in message
news:F5AAA03A20F3F192A75B24DC144A0BB6@in.WebX.maYIadrTaRb...
> for each layer in AdView.Viewer.Layers
> layer.visible=false
> next
>
> The above loop takes approx. 2 sec/100 layers in a VB-script, which I
think
> is too slow.
> (Athlon XP1800+, 1.53 GHz)
> Is it possible to speed it up in any way?
>
> Regards
>
> Per Savås
>
>

Report Inappropriate Content · 01-28-2003 12:42 AM in reply to: *Savås, Per

We seen this slowness as well via VB when turning off and on layers. We
worked around the problem by using the zoombyfactor to zoom in a huge
percentage, turn off and on required layers, then zoom out the same
percentage to the starting point. It seems to be a video thing going on
when turning on and off the layers. When you are zoomed in 3000% and
nothing is visible on the display the layer changes happen instantly

"Scott Sheppard" wrote in message
news:AE61F9F9B6F6D75CBDF1CDE0895AC6B1@in.WebX.maYIadrTaRb...
> The WHIP! API allowed a calling program to specify a set of layers to turn
> on or off, and WHIP! would turn them on or off in one fell swoop. The Volo
> View Express API allowed the caller to turn layers on or off one layer at
a
> time. A Volo View Express newsgroup user pointed out the slowness of Volo
> View Express in this regard. The rejoinder was that the Volo View Express
> layer dialog could be resized. It reminded me of the "Dead Parrot Skit"
from
> Monty Python where I equated the resizability to beautiful plumage. If
> history is any indication, I think the AEV API slowness in this regard is
> that layers are processed one layer at a time.
>
> "Per Savås" wrote in message
> news:F5AAA03A20F3F192A75B24DC144A0BB6@in.WebX.maYIadrTaRb...
> > for each layer in AdView.Viewer.Layers
> > layer.visible=false
> > next
> >
> > The above loop takes approx. 2 sec/100 layers in a VB-script, which I
> think
> > is too slow.
> > (Athlon XP1800+, 1.53 GHz)
> > Is it possible to speed it up in any way?
> >
> > Regards
> >
> > Per Savås
> >
> >
>
>

Report Inappropriate Content · 02-03-2003 02:11 AM in reply to: *Savås, Per

You can use a couple of hidden API methods for turning on and off a group
of layers all at once (performs one window invalidation at the end of the
call):

_layersOn(BSTR listOfLayers)
_layersOff(BSTR listOfLayers)

In your listOfLayers, you need to comma-delimit your layer names. If you
have layer names that contain commas, you need to html-encode those commas,
(i.e. use %27).

Hope that helps.

Jeffrey Klug
Autodesk, Inc.

"Allan Vigfusson" wrote in message
news:37FC21F20765B91686356D7F167DE599@in.WebX.maYIadrTaRb...
> We seen this slowness as well via VB when turning off and on layers. We
> worked around the problem by using the zoombyfactor to zoom in a huge
> percentage, turn off and on required layers, then zoom out the same
> percentage to the starting point. It seems to be a video thing going on
> when turning on and off the layers. When you are zoomed in 3000% and
> nothing is visible on the display the layer changes happen instantly
>
>
> "Scott Sheppard" wrote in message
> news:AE61F9F9B6F6D75CBDF1CDE0895AC6B1@in.WebX.maYIadrTaRb...
> > The WHIP! API allowed a calling program to specify a set of layers to
turn
> > on or off, and WHIP! would turn them on or off in one fell swoop. The
Volo
> > View Express API allowed the caller to turn layers on or off one layer
at
> a
> > time. A Volo View Express newsgroup user pointed out the slowness of
Volo
> > View Express in this regard. The rejoinder was that the Volo View
Express
> > layer dialog could be resized. It reminded me of the "Dead Parrot Skit"
> from
> > Monty Python where I equated the resizability to beautiful plumage. If
> > history is any indication, I think the AEV API slowness in this regard
is
> > that layers are processed one layer at a time.
> >
> > "Per Savås" wrote in message
> > news:F5AAA03A20F3F192A75B24DC144A0BB6@in.WebX.maYIadrTaRb...
> > > for each layer in AdView.Viewer.Layers
> > > layer.visible=false
> > > next
> > >
> > > The above loop takes approx. 2 sec/100 layers in a VB-script, which I
> > think
> > > is too slow.
> > > (Athlon XP1800+, 1.53 GHz)
> > > Is it possible to speed it up in any way?
> > >
> > > Regards
> > >
> > > Per Savås
> > >
> > >
> >
> >
>
>

Report Inappropriate Content · 02-03-2003 10:00 PM in reply to: *Savås, Per

This is _very_ encouraging! Anything more up your sleeve??? I am
especially interested in a replacement for hte ComputeCoordinates
method in Whip.

Michael

"Jeffrey Klug" wrote:

>You can use a couple of hidden API methods for turning on and off a group
>of layers all at once (performs one window invalidation at the end of the
>call):
>
>_layersOn(BSTR listOfLayers)
>_layersOff(BSTR listOfLayers)
>
>In your listOfLayers, you need to comma-delimit your layer names. If you
>have layer names that contain commas, you need to html-encode those commas,
>(i.e. use %27).
>
>Hope that helps.
>
>Jeffrey Klug
>Autodesk, Inc.
>
>

Michael Porter Naval Architect / Boatbuilder
mporter at mp-marine.com
www.mp-marine.com
Cartography: www.cba-inst.org

Report Inappropriate Content · 02-05-2003 04:33 AM in reply to: *Savås, Per

Jeffrey:

Are these API calls used like this?
AdView.Viewer._layersOn(strMyLayerOnList);
AdView.Viewer._layersOff(strMyLayerOffList);

If not, what are the methods attached to?

TIA,

"Jeffrey Klug" wrote in message
news:6ECBCCBCEBEC8A5BBCAF47B7F97B7493@in.WebX.maYIadrTaRb...
> You can use a couple of hidden API methods for turning on and off a group
> of layers all at once (performs one window invalidation at the end of the
> call):
>
> _layersOn(BSTR listOfLayers)
> _layersOff(BSTR listOfLayers)
>
> In your listOfLayers, you need to comma-delimit your layer names. If you
> have layer names that contain commas, you need to html-encode those
commas,
> (i.e. use %27).
>
> Hope that helps.
>
> Jeffrey Klug
> Autodesk, Inc.
>
>
>
> "Allan Vigfusson" wrote in message
> news:37FC21F20765B91686356D7F167DE599@in.WebX.maYIadrTaRb...
> > We seen this slowness as well via VB when turning off and on layers. We
> > worked around the problem by using the zoombyfactor to zoom in a huge
> > percentage, turn off and on required layers, then zoom out the same
> > percentage to the starting point. It seems to be a video thing going on
> > when turning on and off the layers. When you are zoomed in 3000% and
> > nothing is visible on the display the layer changes happen instantly
> >
> >
> > "Scott Sheppard" wrote in message
> > news:AE61F9F9B6F6D75CBDF1CDE0895AC6B1@in.WebX.maYIadrTaRb...
> > > The WHIP! API allowed a calling program to specify a set of layers to
> turn
> > > on or off, and WHIP! would turn them on or off in one fell swoop. The
> Volo
> > > View Express API allowed the caller to turn layers on or off one layer
> at
> > a
> > > time. A Volo View Express newsgroup user pointed out the slowness of
> Volo
> > > View Express in this regard. The rejoinder was that the Volo View
> Express
> > > layer dialog could be resized. It reminded me of the "Dead Parrot
Skit"
> > from
> > > Monty Python where I equated the resizability to beautiful plumage. If
> > > history is any indication, I think the AEV API slowness in this regard
> is
> > > that layers are processed one layer at a time.
> > >
> > > "Per Savås" wrote in message
> > > news:F5AAA03A20F3F192A75B24DC144A0BB6@in.WebX.maYIadrTaRb...
> > > > for each layer in AdView.Viewer.Layers
> > > > layer.visible=false
> > > > next
> > > >
> > > > The above loop takes approx. 2 sec/100 layers in a VB-script, which
I
> > > think
> > > > is too slow.
> > > > (Athlon XP1800+, 1.53 GHz)
> > > > Is it possible to speed it up in any way?
> > > >
> > > > Regards
> > > >
> > > > Per Savås
> > > >
> > > >
> > >
> > >
> >
> >
>
>

Report Inappropriate Content · 02-05-2003 07:55 AM in reply to: *Savås, Per

These are hidden parameters and they are available from VB, but they are not
available from VB Script.

_LayersOn and _LayersOff are parameters, so the correct syntax is.

_LayersOn = "Layer1,Layer2"

_LayersOff = "Layer3,Layer4"

If you want to load a web page with more then one layer turned off at load
time I would use the ViewerParams.

Autodesk DWF Viewer

Layers on/off. Why so slow?

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