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<TITLE>Magic-7.3 Command Reference</TITLE>
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<H1> <IMG SRC=graphics/magic_title2.gif ALT="Magic VLSI Layout Tool Version 7.3">
<IMG SRC=graphics/magic_OGL_sm.gif ALIGN="top" ALT="*"> </H1>
<H2>setpoint</H2>
<HR>
Set the value of the cursor reference point in a specific window.
<HR>
<H3>Usage:</H3>
<BLOCKQUOTE>
<B>setpoint</B> [<I>x y</I> [<I>window_id</I>] <BR><BR>
<BLOCKQUOTE>
where <I>x</I> and <I>y</I> are screen coordinates and
<I>window_id</I> is the identifying number for a layout
window.
</BLOCKQUOTE>
</BLOCKQUOTE>
<H3>Summary:</H3>
<BLOCKQUOTE>
The <B>setpoint</B> command forces the reference point for a specific
window. Each command that executes relative to a window must be able
to translate from the pointer position to a layout coordinate.
Commands that are executed from a script or from the command-line
may not have access to the pointer, but can set the reference point
with this command so that the effect of the command is predictable. <P>
Normally, in interactive this command is not used. However,
scripts that open more than one window need to specify which one
is to take the action of the command. In the Tcl/Tk version, this
can be done by using the <I>tk_path_name</I> command to pass a
command to a specific window. The non-Tcl/Tk version, and the Tcl/Tk
version using the "-dnull" option on the command line (i.e., no
graphics package initialized) must use the <B>setpoint</B> command
to track windows. Although possible, it is generally a bad idea
for a script running in batch mode ("-dnull") to create and access
multiple windows, since the window structures have no useful
function outside of a graphics environment. Nevertheless, it is
important to realize that the <B>openwindow</B> command <I>will</I>
generate multiple virtual windows in a batch-mode environment, and
these can only be separately accessed using the <B>setpoint</B>
command.
</BLOCKQUOTE>
<H3>Implementation Notes:</H3>
<BLOCKQUOTE>
<B>setpoint</B> is implemented as a built-in window command in <B>magic</B>.
</BLOCKQUOTE>
<H3>Bugs:</H3>
<BLOCKQUOTE>
The use of the window ID number is unique to this command and should
be a window name like every other window-related command. Likewise,
scripts would best make use of this command if the position were in
layout coordinates, and <B>magic</B> translated them back to screen
coordinates in the indicated window to set the reference point.
</BLOCKQUOTE>
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<TABLE BORDER=0>
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<TD> <A HREF=commands.html>Return to command index</A>
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<P><I>Last updated:</I> December 4, 2005 at 9:02pm <P>
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