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<hr><h1>QwtScaleDraw Class Reference</h1>A class for drawing scales.
<a href="#_details">More...</a>
<p>
<code>#include <qwt_scldraw.h></code>
<p>
Inherits <a class="el" href="class_qwtdimap.html">QwtDiMap</a>.
<p>
Inheritance diagram for QwtScaleDraw<p><center><img src="class_qwtscaledraw_inherit_graph.gif" border="0" usemap="#QwtScaleDraw_inherit_map" alt="Inheritance graph"></center>
<map name="QwtScaleDraw_inherit_map">
<area href="class_qwtdimap.html" shape="rect" coords="9,1,84,19">
</map>
<center><font size="2">[<a href="graph_legend.html">legend</a>]</font></center><a href="class_qwtscaledraw-members.html">List of all members.</a><table border=0 cellpadding=0 cellspacing=0>
<tr><td colspan=2><br><h2>Public Types</h2></td></tr>
<tr><td nowrap align=right valign=top>enum </td><td valign=bottom><b>Orientation</b> { <br>
<b>Bottom</b>,
<b>Top</b>,
<b>Left</b>,
<b>Right</b>,
<br>
<b>Round</b>
<br>
}</td></tr>
<tr><td colspan=2><br><h2>Public Methods</h2></td></tr>
<tr><td nowrap align=right valign=top> </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a0">QwtScaleDraw</a> ()</td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a1">setScale</a> (const <a class="el" href="class_qwtscalediv.html">QwtScaleDiv</a> &s)</td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a2">setScale</a> (double vmin, double vmax, int maxMajIntv, int maxMinIntv, double step = 0.0, int logarithmic = 0)</td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a3">setGeometry</a> (int xorigin, int yorigin, int length, Orientation o)</td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a4">setAngleRange</a> (double angle1, double angle2)</td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a5">setLabelFormat</a> (char f, int prec)</td></tr>
<tr><td nowrap align=right valign=top>const <a class="el" href="class_qwtscalediv.html">QwtScaleDiv</a>& </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a6">scaleDiv</a> () const</td></tr>
<tr><td nowrap align=right valign=top>Orientation </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a7">orientation</a> () const</td></tr>
<tr><td nowrap align=right valign=top>QRect </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a8">maxBoundingRect</a> (QPainter *p) const</td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a9">maxWidth</a> (QPainter *p, bool worst = TRUE) const</td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a10">maxHeight</a> (QPainter *p) const</td></tr>
<tr><td nowrap align=right valign=top>int </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a11">maxLabelWidth</a> (QPainter *p, int worst = TRUE) const</td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a12">labelFormat</a> (char &f, int &prec) const</td></tr>
<tr><td nowrap align=right valign=top>void </td><td valign=bottom><a class="el" href="class_qwtscaledraw.html#a13">draw</a> (QPainter *p) const</td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
A class for drawing scales.
<p>
<p>
QwtScaleDraw can be used to draw linear or logarithmic scales. A scale has an origin, an orientation and a length, which all can be specified with <a class="el" href="class_qwtscaledraw.html#a3">setGeometry</a>().
<p>
After a scale division has been specified as a <a class="el" href="class_qwtscalediv.html">QwtScaleDiv</a> object using <a class="el" href="class_qwtscaledraw.html#a1">setScale</a>(const QwtScaleDiv &s), or determined internally using setScale(double vmin, double vmax, int maxMajIntv, int maxMinIntv, double step = 0.0, int logarithmic = 0), the scale can be drawn with the QwtScaleDiv::draw() member.
<p>
<hr><h2>Constructor & Destructor Documentation</h2>
<a name="a0" doxytag="QwtScaleDraw::QwtScaleDraw"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
QwtScaleDraw::QwtScaleDraw (
</b></td>
<td valign="bottom"><b>
)
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Constructor.
<p>
<p>
The range of the scale is initialized to [0, 100], the angle range is set to [-135, 135], the geometry is initialized such that the origin is at (0,0), the length is 100, and the orientation is QwtScaleDraw::Bottom. </td>
</tr>
</table>
<hr><h2>Member Function Documentation</h2>
<a name="a13" doxytag="QwtScaleDraw::draw"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
void QwtScaleDraw::draw (
</b></td>
<td valign="bottom"><b>
QPainter * <em>p</em> ) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Draw the scale.
<p>
<dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>p</em>
</td><td>
the painter </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a12" doxytag="QwtScaleDraw::labelFormat"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
void QwtScaleDraw::labelFormat (
</b></td>
<td valign="bottom"><b>
char & <em>f</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int & <em>prec</em> ) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Format character and precision have the same meaning as for the QString class. <dl compact><dt>
<b>Return values: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>f</em>
</td><td>
format character </td></tr>
<tr><td valign=top><em>prec</em>
</td><td>
</td></tr>
</table>
</dl><dl compact><dt>
<b>Returns: </b><dd>
the number format for the major scale labels </dl><dl compact><dt>
<b>See also: </b><dd>
QString::setNum in the Qt manual </dl> </td>
</tr>
</table>
<a name="a8" doxytag="QwtScaleDraw::maxBoundingRect"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
QRect QwtScaleDraw::maxBoundingRect (
</b></td>
<td valign="bottom"><b>
QPainter * <em>p</em> ) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
The bounding rectangle is not very exact for round scales with strange angle ranges. <dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>p</em>
</td><td>
painter </td></tr>
</table>
</dl><dl compact><dt>
<b>Returns: </b><dd>
the maximum bounding rectangle of the scale for a specified painter </dl> </td>
</tr>
</table>
<a name="a10" doxytag="QwtScaleDraw::maxHeight"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
int QwtScaleDraw::maxHeight (
</b></td>
<td valign="bottom"><b>
QPainter * <em>p</em> ) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
<dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>p</em>
</td><td>
painter </td></tr>
</table>
</dl><dl compact><dt>
<b>Returns: </b><dd>
the maximum height of the scale for the specified painter </dl> </td>
</tr>
</table>
<a name="a11" doxytag="QwtScaleDraw::maxLabelWidth"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
int QwtScaleDraw::maxLabelWidth (
</b></td>
<td valign="bottom"><b>
QPainter * <em>p</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>worst</em> = TRUE ) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
<dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>p</em>
</td><td>
painter </td></tr>
<tr><td valign=top><em>worst</em>
</td><td>
If <code>TRUE</code>, take the worst case. If <code>FALSE</code>, take the actual width of the largest label. </td></tr>
</table>
</dl><dl compact><dt>
<b>Returns: </b><dd>
the maximum width of a label </dl> </td>
</tr>
</table>
<a name="a9" doxytag="QwtScaleDraw::maxWidth"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
int QwtScaleDraw::maxWidth (
</b></td>
<td valign="bottom"><b>
QPainter * <em>p</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
bool <em>worst</em> = TRUE ) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
<dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>p</em>
</td><td>
painter </td></tr>
<tr><td valign=top><em>worst</em>
</td><td>
if <code>TRUE</code>, assume the worst possible case. If <code>FALSE</code>, calculate the real maximum width, which is more CPU intensive. </td></tr>
</table>
</dl><dl compact><dt>
<b>Returns: </b><dd>
the maximum width of the scale for a specified QPainter </dl> </td>
</tr>
</table>
<a name="a7" doxytag="QwtScaleDraw::orientation"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
Orientation QwtScaleDraw::orientation (
</b></td>
<td valign="bottom"><b>
) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
<dl compact><dt>
<b>Returns: </b><dd>
scale orientation </dl> </td>
</tr>
</table>
<a name="a6" doxytag="QwtScaleDraw::scaleDiv"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
const <a class="el" href="class_qwtscalediv.html">QwtScaleDiv</a> & QwtScaleDraw::scaleDiv (
</b></td>
<td valign="bottom"><b>
) const
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
<dl compact><dt>
<b>Returns: </b><dd>
scale division </dl> </td>
</tr>
</table>
<a name="a4" doxytag="QwtScaleDraw::setAngleRange"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
void QwtScaleDraw::setAngleRange (
</b></td>
<td valign="bottom"><b>
double <em>angle1</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
double <em>angle2</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Adjust the baseline circle segment for round scales.
<p>
<p>
The baseline will be drawn from min(angle1,angle2) to max(angle1, angle2). The settings have no effect if the scale orientation is not set to QwtScaleDraw::Round. The default setting is [ -135, 135 ]. An angle of 0 degrees corresponds to the 12 o'clock position, and positive angles count in a clockwise direction. <dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>angle1</em>
</td><td>
</td></tr>
<tr><td valign=top><em>angle2</em>
</td><td>
boundaries of the angle interval in degrees. </td></tr>
</table>
</dl><dl compact><dt>
<b>Warning: </b><dd>
<ul>
<li>The angle range is limited to [-360, 360] degrees. Angles exceeding this range will be clipped. <li>For angles more than 359 degrees above or below min(angle1, angle2), scale marks will not be drawn. <li>If you need a counterclockwise scale, use QwtScaleDiv::setRange </ul>
</dl> </td>
</tr>
</table>
<a name="a3" doxytag="QwtScaleDraw::setGeometry"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
void QwtScaleDraw::setGeometry (
</b></td>
<td valign="bottom"><b>
int <em>xorigin</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>yorigin</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>length</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
Orientation <em>o</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Specify the geometry of the scale.
<p>
<p>
The parameters xorigin, yorigin and length have different meanings, dependent on the orientation:
<dl compact>
<dt>QwtScaleDraw::Left <dd>The origin is the topmost point of the baseline. The baseline is a vertical line with the specified length. Scale marks and labels are drawn at the left of the baseline. <dt>QwtScaleDraw::Right <dd>The origin is the topmost point of the baseline. The baseline is a vertical line with the specified length. Scale marks and labels are drawn at the right of the baseline. <dt>QwtScaleDraw::Top <dd>The origin is the leftmost point of the baseline. The baseline is a horizontal line with the specified length. Scale marks and labels are drawn above the baseline. <dt>QwtScaleDraw::Bottom <dd>The origin is the leftmost point of the baseline. The baseline is a horizontal line with the specified length. Scale marks and labels are drawn below the baseline. <dt>QwtScaleDraw::Round <dd>The origin is the top left corner of the bounding rectangle of the baseline circle. The baseline is the segment of a circle with a diameter of the specified length. Scale marks and labels are drawn outside the baseline circle.
</dl>
<dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>xorigin</em>
</td><td>
x coordinate of the origin </td></tr>
<tr><td valign=top><em>yorigin</em>
</td><td>
y coordinate of the origin </td></tr>
<tr><td valign=top><em>length</em>
</td><td>
length or diameter of the scale </td></tr>
<tr><td valign=top><em>o</em>
</td><td>
The orientation </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a5" doxytag="QwtScaleDraw::setLabelFormat"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
void QwtScaleDraw::setLabelFormat (
</b></td>
<td valign="bottom"><b>
char <em>f</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>prec</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Set the number format for the major scale labels.
<p>
<p>
Format character and precision have the same meaning as for the QString class. <dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>f</em>
</td><td>
format character </td></tr>
<tr><td valign=top><em>prec</em>
</td><td>
precision </td></tr>
</table>
</dl><dl compact><dt>
<b>See also: </b><dd>
QString::setNum in the Qt manual </dl> </td>
</tr>
</table>
<a name="a2" doxytag="QwtScaleDraw::setScale"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
void QwtScaleDraw::setScale (
</b></td>
<td valign="bottom"><b>
double <em>x1</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
double <em>x2</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>maxMajIntv</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>maxMinIntv</em>,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
double <em>step</em> = 0.0,
</b></td>
</tr>
<tr>
<td></td>
<td><b>
int <em>logscale</em> = 0 )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Adjust the range of the scale.
<p>
<p>
If step == 0.0, the step width is calculated automatically dependent on the maximal number of scale ticks. <dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>x1</em>
</td><td>
value at the left/low endpoint of the scale </td></tr>
<tr><td valign=top><em>x2</em>
</td><td>
value at the right/high endpoint of the scale </td></tr>
<tr><td valign=top><em>step</em>
</td><td>
step size (default : 0.0) </td></tr>
<tr><td valign=top><em>logscale</em>
</td><td>
logarithmic scale (default : 0) </td></tr>
</table>
</dl> </td>
</tr>
</table>
<a name="a1" doxytag="QwtScaleDraw::setScale"></a><p>
<table width="100%" cellpadding="2" cellspacing="0" border="0">
<tr>
<td class="md">
<table cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap valign="top"><b>
void QwtScaleDraw::setScale (
</b></td>
<td valign="bottom"><b>
const <a class="el" href="class_qwtscalediv.html">QwtScaleDiv</a> & <em>s</em> )
</b></td>
</tr>
</table>
</td>
</tr>
</table>
<table cellspacing=5 cellpadding=0 border=0>
<tr>
<td>
</td>
<td>
<p>
Change the scale division.
<p>
<dl compact><dt>
<b>Parameters: </b><dd>
<table border=0 cellspacing=2 cellpadding=0>
<tr><td valign=top><em>sd</em>
</td><td>
new scale division </td></tr>
</table>
</dl> </td>
</tr>
</table>
<hr>The documentation for this class was generated from the following files:<ul>
<li>qwt_scldraw.h<li>qwt_scldraw.cpp</ul>
<hr><address><small>Generated at Thu Dec 14 00:27:20 2000 for Qwt User's Guide by
<a href="http://www.stack.nl/~dimitri/doxygen/index.html">
<img src="doxygen.gif" alt="doxygen" align="middle" border=0
width=110 height=53></a>1.2.3 written by <a href="mailto:dimitri@stack.nl">Dimitri van Heesch</a>,
© 1997-2000</small></address>
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87682cd952d919324b3a8c179c71b7df
>
files
>
99
