SetView() from javascript in Express

Anonymous · ‎04-22-2003

In whip and volo, I could set the current view rectangle (SetAndDrawView) via javascript. In Express, I can get from the AdViewer object to an AdPageViewer object(via .Viewer - [aside - didn't see it mentioned in the doc, just using ole viewer]) but it gives me an IAdReaderViewer interface. I was hoping for an IAdPageViewer interface where I could try .SetView().

Is there a way in javascript with Express to set the current view/zoom rectangle?

thanks

Anonymous · ‎04-22-2003

Here is a sample code:

Private Sub Form_Load()

CAdViewer1.SourcePath = "C:/tmp.dwf"

End Sub

Private Sub Command1_Click()

Dim pv as IAdPageViewer

Set pv = CAdViewer.Viewer

pv.SetView 0, 0, 10, 10 'Set a zoom window

Dim cpv as CAdPageView

Set cpv = pv.View

'Extract the current display coordinates.

Debug.Print cpv.Bottom &"," &cpv.Left &","
&cpv.Right &"," &cpv.Top

End Sub

cheers,
-Thilak

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"hmp" <
href="mailto:mr.humphrey@verizon.net">mr.humphrey@verizon.net> wrote in
message
href="news:f15b81f.-1@WebX.maYIadrTaRb">news:f15b81f.-1@WebX.maYIadrTaRb...
In
whip and volo, I could set the current view rectangle (SetAndDrawView) via
javascript. In Express, I can get from the AdViewer object to an AdPageViewer
object(via .Viewer - [aside - didn't see it mentioned in the doc, just using
ole viewer]) but it gives me an IAdReaderViewer interface. I was hoping for an
IAdPageViewer interface where I could try .SetView().

Is there a way in javascript with Express to set the current view/zoom
rectangle?

thanks

Anonymous · ‎04-22-2003

But, in JavaScript, you cannot select a different interface, and the default interface returned by .Viewer is IAdReaderViewer.

Are you saying that this cannot be done from javascript?

thanks,

Anonymous · ‎04-23-2003

AdView.Viewer.SetView
(0,0,10,10)

</<SCRIPT>

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"hmp" <
href="mailto:mr.humphrey@verizon.net">mr.humphrey@verizon.net> wrote in
message
href="news:f15b81f.1@WebX.maYIadrTaRb">news:f15b81f.1@WebX.maYIadrTaRb...
But,
in JavaScript, you cannot select a different interface, and the default
interface returned by .Viewer is IAdReaderViewer.

Are you saying that this cannot be done from javascript?

thanks,

Anonymous · ‎04-23-2003

I don't see this in the api documentation.

What units are in the SetView call and in what order? I changed my SetView(left, right, bottom, top) from whip/volo to SetView( left, bottom, right, top) like oleview says for express. But when I give the corners specified in, for example, my "INITIAL" view in the dwf file I end up lost in space. Seemed like my corners of(Left:-13000, Bottom:-8000, Right:13000, Top:8000) seemed off by a factor of 1000 (plus some offset) for the SetView call. I need a call of somewhere around SetView( 0, 0, 10, 10 ) to get my (-13000, -8000, 13000, 8000) corners.

Anonymous · ‎04-23-2003

The parameters are left, bottom,
right, top and they are in paper units (in or mm), not drawing units.

You can also set the view using
the named view collection. I have included some samples below.

size=2>

size=2>function InitialView ()
{

size=2> AdView.Viewer.WaitForPageLoaded();
AdView.Viewer.View =
AdView.Viewer.NamedViews.Item ("INITIAL");
}

function ViewTour
()
{

size=2> AdView.Viewer.WaitForPageLoaded();

size=2> for (i = 1; i <= AdView.Viewer.NamedViews.Count; i++
)
  {
    view =
AdView.Viewer.NamedViews.Item(i);
    AdView.Viewer.View
=
view
    alert(view.name);
  }
}

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"hmp" <
href="mailto:mr.humphrey@verizon.net">mr.humphrey@verizon.net> wrote in
message
href="news:f15b81f.3@WebX.maYIadrTaRb">news:f15b81f.3@WebX.maYIadrTaRb...
I
don't see this in the api documentation.

What units are in the SetView call and in what order? I changed my
SetView(left, right, bottom, top) from whip/volo to SetView( left, bottom,
right, top) like oleview says for express. But when I give the corners
specified in, for example, my "INITIAL" view in the dwf file I end up lost in
space. Seemed like my corners of(Left:-13000, Bottom:-8000, Right:13000,
Top:8000) seemed off by a factor of 1000 (plus some offset) for the SetView
call. I need a call of somewhere around SetView( 0, 0, 10, 10 ) to get my
(-13000, -8000, 13000, 8000) corners.

Anonymous · ‎04-23-2003

Unfortunately, the named views don't apply in my case.
If all I know is the drawing units, how do I know the configuration to paper units that express will be using?

thanks.

Anonymous · ‎04-23-2003

And, by configuration, I apparently mean conversion to paper units.

Anonymous · ‎04-24-2003

In a future release the EV API
may be able to transform a point from drawing units to paper units.

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"hmp" <
href="mailto:mr.humphrey@verizon.net">mr.humphrey@verizon.net> wrote in
message
href="news:f15b81f.6@WebX.maYIadrTaRb">news:f15b81f.6@WebX.maYIadrTaRb...
And,
by configuration, I apparently mean conversion to paper
units.

Anonymous · ‎04-24-2003

I don't mind doing the conversion to EV's paper units. I just don't have enough information to go from the information in the dwf, like drawing units, to whatever EV's 'paper units' represent. Can you provide any information about how paper units are calculated so I can convert my coordinates to paper units?

Anonymous · ‎04-24-2003

The information you need is not available through
the API, other than through the transform point method Ben mentioned, which will
be implemented in the next AEV service pack due soon.

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"hmp" <
href="mailto:mr.humphrey@verizon.net">mr.humphrey@verizon.net> wrote in
message
href="news:f15b81f.8@WebX.maYIadrTaRb">news:f15b81f.8@WebX.maYIadrTaRb...
I
don't mind doing the conversion to EV's paper units. I just don't have enough
information to go from the information in the dwf, like drawing units, to
whatever EV's 'paper units' represent. Can you provide any information about
how paper units are calculated so I can convert my coordinates to paper
units?

Anonymous · ‎04-24-2003

So, essentially this is a useless external api function because it relies on internal units that cannot be known to the external api caller?

Anonymous · ‎04-24-2003

The transform point API allows you to transform
from one coordinate space to another. You determine the source and
destination coordinate spaces and the point to feed in. Coordinate spaces
are either drawing (i.e. AutoCAD model space - double space), DWF (i.e Whip
- integer space), paper (i.e. double space in paper units), or screen (i.e.
pixels).

You obviously know one about one of the coordinate
spaces (drawing units) or else you would have no information with which to
call SetView() in the first place. TransformPoint allows you to use your
coordinate space values to generate those that are compatible with other API
calls.

If you have no knowledge of any units whatsoever,
then yes, this would be quite useless to you.

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"hmp" <
href="mailto:mr.humphrey@verizon.net">mr.humphrey@verizon.net> wrote in
message
href="news:f15b81f.10@WebX.maYIadrTaRb">news:f15b81f.10@WebX.maYIadrTaRb...
So,
essentially this is a useless external api function because it relies on
internal units that cannot be known to the external api
caller?

Anonymous · ‎04-24-2003

You mean the non-existent tranform point api?

Anonymous · ‎04-24-2003

Um, yeah.

It's implemented in the next service pack, due very
soon.

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"hmp" <
href="mailto:mr.humphrey@verizon.net">mr.humphrey@verizon.net> wrote in
message
href="news:f15b81f.12@WebX.maYIadrTaRb">news:f15b81f.12@WebX.maYIadrTaRb...
You
mean the non-existent tranform point api?

Anonymous · ‎04-24-2003

Paper units are, millimeters or
inches. You can ask the page what its units are (I provided an example below).

If you produced the dwf then you
know the scale. If the drawing is in feet and the layout scale is 2:1 you know
that 6 inches in paper space (or page units) is equal to 1 foot. I hope
this will work for you.

At the same time we understand
the need for a more programmatic solution and it is on the way.

size=2>

size=2>function ShowPageUnits()
{

AdView.Viewer.WaitForPageLoaded();
if ( AdView.Viewer.Page.Paper.Units
== 1 )

alert("Inches");

  else
if ( AdView.Viewer.Page.Paper.Units == 2 )

alert("Millimeters");

size=2>

size=2> else if ( AdView.Viewer.Page.Paper.Units == 0
)
alert("Unknown");

}

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"Jeffrey Klug (Autodesk)" <jeffrey dot klug at autodesk dot com>
wrote in message
href="news:ED68917E8F7A019375F9D89FD6EBFAAF@in.WebX.maYIadrTaRb">news:ED68917E8F7A019375F9D89FD6E......

Um, yeah.

It's implemented in the next service pack, due
very soon.

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"hmp" <
href="mailto:mr.humphrey@verizon.net">mr.humphrey@verizon.net> wrote
in message
href="news:f15b81f.12@WebX.maYIadrTaRb">news:f15b81f.12@WebX.maYIadrTaRb...
You
mean the non-existent tranform point
api?

Anonymous · ‎04-24-2003

Paper units are, millimeters or
inches. You can ask the page what its units are (I provided an example below).

If you produced the dwf then you
know the scale. If the drawing is in feet and the layout scale is 2:1 you know
that 6 inches in paper space (or page units) is equal to 1 foot. I hope
this will work for you.

At the same time we understand
the need for a more programmatic solution and it is on the way.

size=2>

size=2>function ShowPageUnits()
{

AdView.Viewer.WaitForPageLoaded();
if ( AdView.Viewer.Page.Paper.Units
== 1 )

alert("Inches");

  else
if ( AdView.Viewer.Page.Paper.Units == 2 )

alert("Millimeters");

size=2>

size=2> else if ( AdView.Viewer.Page.Paper.Units == 0
)
alert("Unknown");

}

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"hmp" <
href="mailto:mr.humphrey@verizon.net">mr.humphrey@verizon.net> wrote in
message
href="news:f15b81f.10@WebX.maYIadrTaRb">news:f15b81f.10@WebX.maYIadrTaRb...
So,
essentially this is a useless external api function because it relies on
internal units that cannot be known to the external api
caller?

Anonymous · ‎04-24-2003

Paper units are, millimeters or inches. You can ask the page what its units
are (I provided an example below).

If you produced the dwf then you know the scale. If the drawing is in feet
and the layout scale is 2:1 you know that 6 inches in paper space (or page
units) is equal to 1 foot. I hope this will work for you.

At the same time we understand the need for a more programmatic solution and
it is on the way.

function ShowPageUnits()
{
AdView.Viewer.WaitForPageLoaded();
if ( AdView.Viewer.Page.Paper.Units == 1 )
alert("Inches");

else if ( AdView.Viewer.Page.Paper.Units == 2 )
alert("Millimeters");

else if ( AdView.Viewer.Page.Paper.Units == 0 )
alert("Unknown");

}

"hmp" wrote in message
news:f15b81f.10@WebX.maYIadrTaRb...
So, essentially this is a useless external api function because it relies on
internal units that cannot be known to the external api caller?

Anonymous · ‎04-24-2003

I simply want to set the view to a particular area of the drawing. What I need to do this myself is the coordinate transformation from a coordinate space I might know like drawing units in the DWF file to the exact coordinate space needed for the call to SetView. This doesn't involve what the units are, but rather the relative scale of the two coordinate spaces and an x-y offset for the transformation. Hopefully the upcoming TransformPoint method will correctly transform drawing coordinates as used in the DWF file to the coordinates used in EV's external methods like SetView(), but until then SetView() is a completely useless function because no caller could know the values to provide.

In my opinion, and apparently the authors of Whip and Volo, the natural units to be used in external methods like SetView are simply the drawing units of the DWF, not some (at this point, unknowable) paper units.

Part of what is frustrating is that the crippled functionality of Autodesk Express Viewer is coupled with Autodesk to make Whip and Voloview unavailable. This leaves me in the position of explaining to my customers that to access functionality that had been available since the earliest DWF viewers, each and every one of my customers potential internet users must run the Whip install which I luckily found lying in the recycle bin on my machine. And, well it would be a little easier if an earlier reply said SetView won't work until a later version rather than fruitlessly investing time in exploring it.

Anonymous · ‎04-24-2003

Should I be concerned that the upcomming TransformPoint method won't actually work from javascript but will be limited to vb and vbscript?

SetView() from javascript in Express

SetView() from javascript in Express

Forums Links

Post to forums