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| 22 | <font color="#004faf">All Classes</font></a>
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| 24 | <font color="#004faf">Main Classes</font></a>
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| 26 | <font color="#004faf">Annotated</font></a>
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| 28 | <font color="#004faf">Grouped Classes</font></a>
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| 30 | <font color="#004faf">Functions</font></a>
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| 31 | </td>
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| 32 | <td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>The 'Big Picture'</h1>
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| 33 |
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| 34 |
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| 35 | <p>
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| 36 | <p> <center><img src="chart-forms.png" alt="The chart application's dialogs"></center>
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| 37 | <p> The <tt>chart</tt> program allows users to create, save, load and visualise
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| 38 | simple data sets. Each data element that the user enters can be given
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| 39 | a color and pattern for the pie segment or bar, some label text and
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| 40 | the text's position and color. The <tt>Element</tt> class is used to
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| 41 | represent data elements.
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| 42 | <p> The program consists of a simple <tt>main.cpp</tt> that loads the chart
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| 43 | form. The chart form has a menubar and toolbar which provide access to
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| 44 | the program's functionality. The program provides two dialogs, one to
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| 45 | set options, and the other to create and edit a data set. Both dialogs
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| 46 | are launched from chart form menu options or toolbar buttons.
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| 47 | <p> The chart form's main widget is a <a href="qcanvasview.html">QCanvasView</a> which displays the
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| 48 | <a href="qcanvas.html">QCanvas</a> on which we draw the pie chart or bar graph. We subclass
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| 49 | QCanvasView to obtain some specialised behaviour. Similarly we
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| 50 | subclass the <a href="qcanvastext.html">QCanvasText</a> class (used to place text items on a canvas)
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| 51 | since we require slightly more than the standard class provides.
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| 52 | <p> The project file, <tt>chart.pro</tt>, is used to create the Makefile that is
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| 53 | used to build the application.
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| 54 | <p> <p align="right">
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| 55 | <a href="tutorial2-01.html">« Introduction</a> |
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| 56 | <a href="tutorial2.html">Contents</a> |
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| 57 | <a href="tutorial2-03.html">Data Elements »</a>
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| 58 | </p>
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| 59 | <p>
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| 60 | <!-- eof -->
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| 61 | <p><address><hr><div align=center>
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| 62 | <table width=100% cellspacing=0 border=0><tr>
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| 63 | <td>Copyright © 2007
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| 64 | <a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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| 65 | <td align=right><div align=right>Qt 3.3.8</div>
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| 66 | </table></div></address></body>
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| 67 | </html>
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