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<H3><A NAME="9_7_4">9.7.4 Vertical line</A></H3>
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<P> The final object you may add to a Gantt chart is simple, but quite
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 useful, a straight vertical line extending over the whole plot height.
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 This could for example be used to illustrate different phases in a
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 project. You create a line object by a call to GanttVLine()</P>
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<P> The full signature for GanttVLine() is<DIV class="phpscript"><CODE><FONT
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color="#000000"> <FONT color="#0000BB">&nbsp;</FONT><FONT color="#007700">
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function&nbsp;</FONT><FONT color="#0000BB">GanttVLine</FONT><FONT color="#007700">
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(</FONT><FONT color="#0000BB">$aDate</FONT><FONT color="#007700">,</FONT><FONT
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color="#0000BB">$aTitle</FONT><FONT color="#007700">,</FONT><FONT color="#0000BB">
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$aColor</FONT><FONT color="#007700">,</FONT><FONT color="#0000BB">
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$aWeight</FONT><FONT color="#007700">,</FONT><FONT color="#0000BB">
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$aStyle</FONT><FONT color="#007700">)</FONT><FONT color="#0000BB"></FONT>
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</FONT></CODE></DIV></P>
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<P></P>
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<P></P>
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<TABLE border="0">
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<TR><TD valign="top">
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<!--span style=&quot;font-family:times;font-size:85%;font-weight:bold;&quot;-->
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<CODE><FONT color="#000000"> <FONT color="#0000BB">&nbsp;$aDate&nbsp;</FONT></FONT>
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</CODE></TD><TD valign="top">&nbsp;</TD><TD>Date for the milestone</TD></TR>
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<TR><TD valign="top">
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<!--span style=&quot;font-family:times;font-size:85%;font-weight:bold;&quot;-->
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<CODE><FONT color="#000000"> <FONT color="#0000BB">&nbsp;$aTitle&nbsp;</FONT></FONT>
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</CODE></TD><TD valign="top">&nbsp;</TD><TD>Title for the line. The title is
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 displayed at the bottom of the line</TD></TR>
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<TR><TD valign="top">
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<!--span style=&quot;font-family:times;font-size:85%;font-weight:bold;&quot;-->
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<CODE><FONT color="#000000"> <FONT color="#0000BB">&nbsp;$aColor&nbsp;</FONT></FONT>
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</CODE></TD><TD valign="top">&nbsp;</TD><TD>Color for the line</TD></TR>
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<TR><TD valign="top">
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<!--span style=&quot;font-family:times;font-size:85%;font-weight:bold;&quot;-->
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<CODE><FONT color="#000000"> <FONT color="#0000BB">&nbsp;$aWeight&nbsp;</FONT></FONT>
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</CODE></TD><TD valign="top">&nbsp;</TD><TD>Line width</TD></TR>
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<TR><TD valign="top">
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<!--span style=&quot;font-family:times;font-size:85%;font-weight:bold;&quot;-->
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<CODE><FONT color="#000000"> <FONT color="#0000BB">&nbsp;$aStyle&nbsp;</FONT></FONT>
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</CODE></TD><TD valign="top">&nbsp;</TD><TD>Line style,&quot;dashed&quot;, &quot;dotted&quot; and
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 so on</TD></TR>
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</TABLE>
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<P> Valid creations of lines are for example</P>
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<UL>
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<LI><DIV class="phpscript"><CODE><FONT color="#000000"> <FONT color="#0000BB">
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&nbsp;$vline&nbsp;</FONT><FONT color="#007700">=&nbsp;new&nbsp;</FONT><FONT color="#0000BB">
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GanttVLine</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
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&quot;2001-12-24&quot;</FONT><FONT color="#007700">);</FONT><FONT color="#0000BB"></FONT>
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</FONT></CODE></DIV>
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<P></P>
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</LI>
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<LI><DIV class="phpscript"><CODE><FONT color="#000000"> <FONT color="#0000BB">
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&nbsp;$vline&nbsp;</FONT><FONT color="#007700">=&nbsp;new&nbsp;</FONT><FONT color="#0000BB">
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GanttVLine</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
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&quot;2001-12-24&quot;</FONT><FONT color="#007700">,</FONT><FONT color="#DD0000">
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&quot;Phase&nbsp;1&quot;</FONT><FONT color="#007700">);</FONT><FONT color="#0000BB"></FONT>
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</FONT></CODE></DIV>
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<P></P>
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</LI>
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<LI><DIV class="phpscript"><CODE><FONT color="#000000"> <FONT color="#0000BB">
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&nbsp;$vline&nbsp;</FONT><FONT color="#007700">=&nbsp;new&nbsp;</FONT><FONT color="#0000BB">
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GanttVLine</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
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&quot;2001-12-24&quot;</FONT><FONT color="#007700">,</FONT><FONT color="#DD0000">
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&quot;Phase&nbsp;1&quot;</FONT><FONT color="#007700">,</FONT><FONT color="#DD0000">
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&quot;darkred&quot;</FONT><FONT color="#007700">);</FONT><FONT color="#0000BB"></FONT>
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</FONT></CODE></DIV>
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<P></P>
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</LI>
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<LI><DIV class="phpscript"><CODE><FONT color="#000000"> <FONT color="#0000BB">
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&nbsp;$vline&nbsp;</FONT><FONT color="#007700">=&nbsp;new&nbsp;</FONT><FONT color="#0000BB">
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GanttVLine</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
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&quot;2001-12-24&quot;</FONT><FONT color="#007700">,</FONT><FONT color="#DD0000">
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&quot;Phase&nbsp;1&quot;</FONT><FONT color="#007700">,</FONT><FONT color="#DD0000">
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&quot;darkred&quot;</FONT><FONT color="#007700">,</FONT><FONT color="#0000BB">5</FONT><FONT
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color="#007700">);</FONT><FONT color="#0000BB"></FONT></FONT></CODE></DIV>
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<P></P>
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</LI>
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<LI><DIV class="phpscript"><CODE><FONT color="#000000"> <FONT color="#0000BB">
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&nbsp;$vline&nbsp;</FONT><FONT color="#007700">=&nbsp;new&nbsp;</FONT><FONT color="#0000BB">
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GanttVLine</FONT><FONT color="#007700">(</FONT><FONT color="#DD0000">
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&quot;2001-12-24&quot;</FONT><FONT color="#007700">,</FONT><FONT color="#DD0000">
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&quot;Phase&nbsp;1&quot;</FONT><FONT color="#007700">,</FONT><FONT color="#DD0000">
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&quot;darkred&quot;</FONT><FONT color="#007700">,</FONT><FONT color="#0000BB">5</FONT><FONT
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color="#007700">,</FONT><FONT color="#DD0000">&quot;dotted&quot;</FONT><FONT color="#007700">
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);</FONT><FONT color="#0000BB"></FONT></FONT></CODE></DIV>
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<P></P>
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</LI>
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</UL>
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<P> To add the line to the graph you just have to call GanttGraph::Add()
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 as with milestones and bars. Let's illustrate the use of vertical lines
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 by adding a line to the previous example.<DIV class="phpscript"><CODE><FONT
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color="#000000"> <FONT color="#0000BB">&nbsp;$vline&nbsp;</FONT><FONT color="#007700">
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=&nbsp;new&nbsp;</FONT><FONT color="#0000BB">GanttVLine</FONT><FONT color="#007700">
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(</FONT><FONT color="#DD0000">&quot;2001-12-24&quot;</FONT><FONT color="#007700">,</FONT><FONT
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color="#DD0000">&quot;Phase&nbsp;1&quot;</FONT><FONT color="#007700">);
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<BR></FONT><FONT color="#0000BB">$graph</FONT><FONT color="#007700">-&gt;</FONT><FONT
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color="#0000BB">Add</FONT><FONT color="#007700">(</FONT><FONT color="#0000BB">
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$vline</FONT><FONT color="#007700">);
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<BR></FONT><FONT color="#0000BB"></FONT></FONT></CODE></DIV></P>
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<P> and the example (See 153) now becomes<DIV class="example">
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<BR> <A href="exframes/frame_ganttex06.html" target="blank"><IMG border="0"
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HEIGHT="189"       src="img/img/img/img/img/img/ganttex06.png" WIDTH="502"></A>
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<BR><B>Figure 153:</B> Adding a vertical line with a title to the Gantt
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 chart <A href="exframes/frame_ganttex06.html" target="blank">[src]</A>&nbsp;
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<P></P>
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</DIV></P>
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<P> From the above figure you can see that by default the line is drawn
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 at the beginning of the day of the specified date and in a 'dashed'
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 style. This can (of course!) be modified so that the line is
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 drawn/aligned anywhere in the specified day. You modify this by
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 invoking the method SetDayOffset() with an argument specifying the
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 fraction of the day where you want the line positioned.</P>
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<P> If you, for example, want to display the line in the middle of the
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 day just add the line<DIV class="phpscript"><CODE><FONT color="#000000">
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 <FONT color="#0000BB">&nbsp;$vline</FONT><FONT color="#007700">-&gt;</FONT><FONT
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color="#0000BB">SetDayOffset</FONT><FONT color="#007700">(</FONT><FONT color="#0000BB">
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0.5</FONT><FONT color="#007700">);</FONT><FONT color="#0000BB"></FONT></FONT>
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</CODE></DIV></P>
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<P> to the previous code and the result will be<DIV class="example">
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<BR> <A href="exframes/frame_ganttex07.html" target="blank"><IMG border="0"
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HEIGHT="189"       src="img/img/img/img/img/img/ganttex07.png" WIDTH="502"></A>
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<BR><B>Figure 154:</B> Modifying the position of the line within the day
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 <A href="exframes/frame_ganttex07.html" target="blank">[src]</A>&nbsp;
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<P></P>
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</DIV></P>
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<P></P>
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<P> As usual you may modify the font, size and color by invoking the
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 appropriate method (SetFont(), SetColor()) on the 'title' property of
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 lines.</P>
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