[Mapserver-users] Problems with zoomrectangle function
Benjamin Wragg
bwragg at tpg.com.au
Sun Jan 12 14:21:13 PST 2003
This is a multi-part message in MIME format.
------=_NextPart_000_0001_01C2BAE0.EDEE6720
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
I=92m having some trouble with the zoomrectangle function, which I=92m =
using
with a JavaScript rubber band zoom tool I=92ve built.
=20
I=92m passing the following arguments in:=20
A rectangle object which contains the new extents in pixels
The map image width
The map image height
The map objects=92 current extent object.
=20
So my call to the function looks like this:
=20
$GLOBALS['map']->zoomrectangle($extentRectObj,$GLOBALS['map']->width,$GL
OBALS['map']->height,$GLOBALS['map']->extent);
=20
When I=92m zoomed to the full extent of my map file (-180, -90, 180, 90)
the rubber band zoom tool creates a new image but with no extents
changed. I can check this further by printing the map objects extent
values before and after the function call and they are the same.
=20
When I change my map extents so I=92m zoomed in on the map (I can do =
this
by using a tool which sets the extent coordinates manually), my tool
starts to work. I can=92t figure out why? No errors are being generated =
at
any of the times the zoom doesn=92t work.
=20
Thanks,
=20
Benjamin
=20
=20
------=_NextPart_000_0001_01C2BAE0.EDEE6720
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<html>
<head>
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Diso-8859-1">
<meta name=3DGenerator content=3D"Microsoft Word 10 (filtered)">
<style>
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:Arial;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.EmailStyle17
{font-family:Arial;
color:windowtext;}
@page Section1
{size:612.0pt 792.0pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=3DEN-US link=3Dblue vlink=3Dpurple>
<div class=3DSection1>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>I’m
having some trouble with the zoomrectangle function, which I’m =
using with
a JavaScript rubber band zoom tool I’ve built.</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>I’m
passing the following arguments in: </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>A
rectangle object which contains the new extents in =
pixels</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>The
map image width</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>The
map image height</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>The map
objects’ current extent object.</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>So my
call to the function looks like this:</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>$GLOBALS['map']->zoomrectangle($extentRectO=
bj,$GLOBALS['map']->width,$GLOBALS['map']->height,$GLOBALS['map']-&=
gt;extent);</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>When
I’m zoomed to the full extent of my map file (-180, -90, 180, 90) =
the
rubber band zoom tool creates a new image but with no extents changed. I =
can
check this further by printing the map objects extent values before and =
after the
function call and they are the same.</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>When I
change my map extents so I’m zoomed in on the map (I can do this =
by using
a tool which sets the extent coordinates manually), my tool starts to =
work. I
can’t figure out why? No errors are being generated at any of the =
times
the zoom doesn’t work.</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial> </font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>Thanks,</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial> </font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'>Benjamin</span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 face=3DArial><span =
style=3D'font-size:10.0pt'> </span></font></p>
</div>
</body>
</html>
------=_NextPart_000_0001_01C2BAE0.EDEE6720--
More information about the MapServer-users
mailing list