diff options
Diffstat (limited to 'doc/html/qwmatrix.html')
| -rw-r--r-- | doc/html/qwmatrix.html | 449 |
1 files changed, 0 insertions, 449 deletions
diff --git a/doc/html/qwmatrix.html b/doc/html/qwmatrix.html deleted file mode 100644 index 10488978..00000000 --- a/doc/html/qwmatrix.html +++ /dev/null @@ -1,449 +0,0 @@ -<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> -<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/kernel/qwmatrix.cpp:51 --> -<html> -<head> -<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> -<title>TQWMatrix Class</title> -<style type="text/css"><!-- -fn { margin-left: 1cm; text-indent: -1cm; } -a:link { color: #004faf; text-decoration: none } -a:visited { color: #672967; text-decoration: none } -body { background: #ffffff; color: black; } ---></style> -</head> -<body> - -<table border="0" cellpadding="0" cellspacing="0" width="100%"> -<tr bgcolor="#E5E5E5"> -<td valign=center> - <a href="index.html"> -<font color="#004faf">Home</font></a> - | <a href="classes.html"> -<font color="#004faf">All Classes</font></a> - | <a href="mainclasses.html"> -<font color="#004faf">Main Classes</font></a> - | <a href="annotated.html"> -<font color="#004faf">Annotated</font></a> - | <a href="groups.html"> -<font color="#004faf">Grouped Classes</font></a> - | <a href="functions.html"> -<font color="#004faf">Functions</font></a> -</td> -<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQWMatrix Class Reference</h1> - -<p>The TQWMatrix class specifies 2D transformations of a -coordinate system. -<a href="#details">More...</a> -<p><tt>#include <<a href="qwmatrix-h.html">qwmatrix.h</a>></tt> -<p><a href="qwmatrix-members.html">List of all member functions.</a> -<h2>Public Members</h2> -<ul> -<li class=fn><a href="#TQWMatrix"><b>TQWMatrix</b></a> ()</li> -<li class=fn><a href="#TQWMatrix-2"><b>TQWMatrix</b></a> ( double m11, double m12, double m21, double m22, double dx, double dy )</li> -<li class=fn>void <a href="#setMatrix"><b>setMatrix</b></a> ( double m11, double m12, double m21, double m22, double dx, double dy )</li> -<li class=fn>double <a href="#m11"><b>m11</b></a> () const</li> -<li class=fn>double <a href="#m12"><b>m12</b></a> () const</li> -<li class=fn>double <a href="#m21"><b>m21</b></a> () const</li> -<li class=fn>double <a href="#m22"><b>m22</b></a> () const</li> -<li class=fn>double <a href="#dx"><b>dx</b></a> () const</li> -<li class=fn>double <a href="#dy"><b>dy</b></a> () const</li> -<li class=fn>void <a href="#map"><b>map</b></a> ( int x, int y, int * tx, int * ty ) const</li> -<li class=fn>void <a href="#map-2"><b>map</b></a> ( double x, double y, double * tx, double * ty ) const</li> -<li class=fn>TQRect <a href="#mapRect"><b>mapRect</b></a> ( const TQRect & rect ) const</li> -<li class=fn>TQPoint <a href="#map-3"><b>map</b></a> ( const TQPoint & p ) const</li> -<li class=fn>TQRect map ( const TQRect & r ) const <em>(obsolete)</em></li> -<li class=fn>TQPointArray <a href="#map-5"><b>map</b></a> ( const TQPointArray & a ) const</li> -<li class=fn>TQRegion <a href="#map-6"><b>map</b></a> ( const TQRegion & r ) const</li> -<li class=fn>TQRegion <a href="#mapToRegion"><b>mapToRegion</b></a> ( const TQRect & rect ) const</li> -<li class=fn>TQPointArray <a href="#mapToPolygon"><b>mapToPolygon</b></a> ( const TQRect & rect ) const</li> -<li class=fn>void <a href="#reset"><b>reset</b></a> ()</li> -<li class=fn>bool <a href="#isIdentity"><b>isIdentity</b></a> () const</li> -<li class=fn>TQWMatrix & <a href="#translate"><b>translate</b></a> ( double dx, double dy )</li> -<li class=fn>TQWMatrix & <a href="#scale"><b>scale</b></a> ( double sx, double sy )</li> -<li class=fn>TQWMatrix & <a href="#shear"><b>shear</b></a> ( double sh, double sv )</li> -<li class=fn>TQWMatrix & <a href="#rotate"><b>rotate</b></a> ( double a )</li> -<li class=fn>bool <a href="#isInvertible"><b>isInvertible</b></a> () const</li> -<li class=fn>double <a href="#det"><b>det</b></a> () const</li> -<li class=fn>TQWMatrix <a href="#invert"><b>invert</b></a> ( bool * invertible = 0 ) const</li> -<li class=fn>bool <a href="#operator-eq-eq"><b>operator==</b></a> ( const TQWMatrix & m ) const</li> -<li class=fn>bool <a href="#operator!-eq"><b>operator!=</b></a> ( const TQWMatrix & m ) const</li> -<li class=fn>TQWMatrix & <a href="#operator*-eq"><b>operator*=</b></a> ( const TQWMatrix & m )</li> -<li class=fn>enum <a href="#TransformationMode-enum"><b>TransformationMode</b></a> { Points, Areas }</li> -</ul> -<h2>Static Public Members</h2> -<ul> -<li class=fn>void <a href="#setTransformationMode"><b>setTransformationMode</b></a> ( TQWMatrix::TransformationMode m )</li> -<li class=fn>TransformationMode <a href="#transformationMode"><b>transformationMode</b></a> ()</li> -</ul> -<h2>Related Functions</h2> -<ul> -<li class=fn>TQDataStream & <a href="#operator-lt-lt"><b>operator<<</b></a> ( TQDataStream & s, const TQWMatrix & m )</li> -<li class=fn>TQDataStream & <a href="#operator-gt-gt"><b>operator>></b></a> ( TQDataStream & s, TQWMatrix & m )</li> -</ul> -<hr><a name="details"></a><h2>Detailed Description</h2> - - -The TQWMatrix class specifies 2D transformations of a -coordinate system. -<p> - -<p> The standard coordinate system of a <a href="qpaintdevice.html">paint - device</a> has the origin located at the top-left position. X -values increase to the right; Y values increase downward. -<p> This coordinate system is the default for the <a href="qpainter.html">TQPainter</a>, which -renders graphics in a paint device. A user-defined coordinate -system can be specified by setting a TQWMatrix for the painter. -<p> Example: -<pre> - MyWidget::paintEvent( <a href="qpaintevent.html">TQPaintEvent</a> * ) - { - <a href="qpainter.html">TQPainter</a> p; // our painter - TQWMatrix m; // our transformation matrix - m.<a href="#rotate">rotate</a>( 22.5 ); // rotated coordinate system - p.<a href="qpainter.html#begin">begin</a>( this ); // start painting - p.<a href="qpainter.html#setWorldMatrix">setWorldMatrix</a>( m ); // use rotated coordinate system - p.<a href="qpainter.html#drawText">drawText</a>( 30,20, "detator" ); // draw rotated text at 30,20 - p.<a href="qpainter.html#end">end</a>(); // painting done - } - </pre> - -<p> A matrix specifies how to translate, scale, shear or rotate the -graphics; the actual transformation is performed by the drawing -routines in <a href="qpainter.html">TQPainter</a> and by <a href="qpixmap.html#xForm">TQPixmap::xForm</a>(). -<p> The TQWMatrix class contains a 3x3 matrix of the form: -<table align=center border=1 cellpadding=1 cellspacing=0> -<tr align=center><td>m11</td><td>m12</td><td> 0 </td></tr> -<tr align=center><td>m21</td><td>m22</td><td> 0 </td></tr> -<tr align=center><td>dx</td> <td>dy</td> <td> 1 </td></tr> -</table> -<p> A matrix transforms a point in the plane to another point: -<pre> - x' = m11*x + m21*y + dx - y' = m22*y + m12*x + dy - </pre> - -<p> The point <em>(x, y)</em> is the original point, and <em>(x', y')</em> is the -transformed point. <em>(x', y')</em> can be transformed back to <em>(x, y)</em> by performing the same operation on the <a href="#invert">inverted matrix</a>. -<p> The elements <em>dx</em> and <em>dy</em> specify horizontal and vertical -translation. The elements <em>m11</em> and <em>m22</em> specify horizontal and -vertical scaling. The elements <em>m12</em> and <em>m21</em> specify -horizontal and vertical shearing. -<p> The identity matrix has <em>m11</em> and <em>m22</em> set to 1; all others are -set to 0. This matrix maps a point to itself. -<p> Translation is the simplest transformation. Setting <em>dx</em> and <em>dy</em> will move the coordinate system <em>dx</em> units along the X axis -and <em>dy</em> units along the Y axis. -<p> Scaling can be done by setting <em>m11</em> and <em>m22</em>. For example, -setting <em>m11</em> to 2 and <em>m22</em> to 1.5 will double the height and -increase the width by 50%. -<p> Shearing is controlled by <em>m12</em> and <em>m21</em>. Setting these -elements to values different from zero will twist the coordinate -system. -<p> Rotation is achieved by carefully setting both the shearing -factors and the scaling factors. The TQWMatrix also has a function -that sets <a href="#rotate">rotation</a> directly. -<p> TQWMatrix lets you combine transformations like this: -<pre> - TQWMatrix m; // identity matrix - m.<a href="#translate">translate</a>(10, -20); // first translate (10,-20) - m.<a href="#rotate">rotate</a>(25); // then rotate 25 degrees - m.<a href="#scale">scale</a>(1.2, 0.7); // finally scale it - </pre> - -<p> Here's the same example using basic matrix operations: -<pre> - double a = pi/180 * 25; // convert 25 to radians - double sina = sin(a); - double cosa = cos(a); - TQWMatrix m1(1, 0, 0, 1, 10, -20); // translation matrix - TQWMatrix m2( cosa, sina, // rotation matrix - -sina, cosa, 0, 0 ); - TQWMatrix m3(1.2, 0, 0, 0.7, 0, 0); // scaling matrix - TQWMatrix m; - m = m3 * m2 * m1; // combine all transformations - </pre> - -<p> <a href="qpainter.html">TQPainter</a> has functions to translate, scale, shear and rotate the -coordinate system without using a TQWMatrix. Although these -functions are very convenient, it can be more efficient to build a -TQWMatrix and call <a href="qpainter.html#setWorldMatrix">TQPainter::setWorldMatrix</a>() if you want to perform -more than a single transform operation. -<p> <p>See also <a href="qpainter.html#setWorldMatrix">TQPainter::setWorldMatrix</a>(), <a href="qpixmap.html#xForm">TQPixmap::xForm</a>(), <a href="graphics.html">Graphics Classes</a>, and <a href="images.html">Image Processing Classes</a>. - -<hr><h2>Member Type Documentation</h2> -<h3 class=fn><a name="TransformationMode-enum"></a>TQWMatrix::TransformationMode</h3> - -<p> <!-- index transformation matrix --> -<p> TQWMatrix offers two transformation modes. Calculations can either -be done in terms of points (Points mode, the default), or in -terms of area (Area mode). -<p> In Points mode the transformation is applied to the points that -mark out the shape's bounding line. In Areas mode the -transformation is applied in such a way that the area of the -contained region is correctly transformed under the matrix. -<ul> -<li><tt>TQWMatrix::Points</tt> - transformations are applied to the shape's points. -<li><tt>TQWMatrix::Areas</tt> - transformations are applied (e.g. to the width and -height) so that the area is transformed. -</ul><p> Example: -<p> Suppose we have a rectangle, -<tt>TQRect( 10, 20, 30, 40 )</tt> and a transformation matrix -<tt>TQWMatrix( 2, 0, 0, 2, 0, 0 )</tt> to double the rectangle's size. -<p> In Points mode, the matrix will transform the top-left (10,20) and -the bottom-right (39,59) points producing a rectangle with its -top-left point at (20,40) and its bottom-right point at (78,118), -i.e. with a width of 59 and a height of 79. -<p> In Areas mode, the matrix will transform the top-left point in -the same way as in Points mode to (20/40), and double the width -and height, so the bottom-right will become (69,99), i.e. a width -of 60 and a height of 80. -<p> Because integer arithmetic is used (for speed), rounding -differences mean that the modes will produce slightly different -results given the same shape and the same transformation, -especially when scaling up. This also means that some operations -are not commutative. -<p> Under Points mode, <tt>matrix * ( region1 | region2 )</tt> is not equal to -<tt>matrix * region1 | matrix * region2</tt>. Under Area mode, <tt>matrix * (pointarray[i])</tt> is not neccesarily equal to -<tt>(matrix * pointarry)[i]</tt>. -<p> <center><img src="xform.png" alt="Comparison of Points and Areas TransformationModes"></center> -<hr><h2>Member Function Documentation</h2> -<h3 class=fn><a name="TQWMatrix"></a>TQWMatrix::TQWMatrix () -</h3> -Constructs an identity matrix. All elements are set to zero except -<em>m11</em> and <em>m22</em> (scaling), which are set to 1. - -<h3 class=fn><a name="TQWMatrix-2"></a>TQWMatrix::TQWMatrix ( double m11, double m12, double m21, double m22, double dx, double dy ) -</h3> -Constructs a matrix with the elements, <em>m11</em>, <em>m12</em>, <em>m21</em>, <em>m22</em>, <em>dx</em> and <em>dy</em>. - -<h3 class=fn>double <a name="det"></a>TQWMatrix::det () const -</h3> - -<p> Returns the matrix's determinant. - -<h3 class=fn>double <a name="dx"></a>TQWMatrix::dx () const -</h3> - -<p> Returns the horizontal translation. - -<h3 class=fn>double <a name="dy"></a>TQWMatrix::dy () const -</h3> - -<p> Returns the vertical translation. - -<h3 class=fn><a href="qwmatrix.html">TQWMatrix</a> <a name="invert"></a>TQWMatrix::invert ( bool * invertible = 0 ) const -</h3> -Returns the inverted matrix. -<p> If the matrix is singular (not invertible), the identity matrix is -returned. -<p> If <em>invertible</em> is not 0: the value of <em>*invertible</em> is set -to TRUE if the matrix is invertible; otherwise <em>*invertible</em> is -set to FALSE. -<p> <p>See also <a href="#isInvertible">isInvertible</a>(). - -<p>Example: <a href="tutorial1-14.html#x2433">t14/cannon.cpp</a>. -<h3 class=fn>bool <a name="isIdentity"></a>TQWMatrix::isIdentity () const -</h3> -Returns TRUE if the matrix is the identity matrix; otherwise returns FALSE. -<p> <p>See also <a href="#reset">reset</a>(). - -<h3 class=fn>bool <a name="isInvertible"></a>TQWMatrix::isInvertible () const -</h3> - -<p> Returns TRUE if the matrix is invertible; otherwise returns FALSE. -<p> <p>See also <a href="#invert">invert</a>(). - -<h3 class=fn>double <a name="m11"></a>TQWMatrix::m11 () const -</h3> - -<p> Returns the X scaling factor. - -<h3 class=fn>double <a name="m12"></a>TQWMatrix::m12 () const -</h3> - -<p> Returns the vertical shearing factor. - -<h3 class=fn>double <a name="m21"></a>TQWMatrix::m21 () const -</h3> - -<p> Returns the horizontal shearing factor. - -<h3 class=fn>double <a name="m22"></a>TQWMatrix::m22 () const -</h3> - -<p> Returns the Y scaling factor. - -<h3 class=fn>void <a name="map"></a>TQWMatrix::map ( int x, int y, int * tx, int * ty ) const -</h3> -Transforms ( <em>x</em>, <em>y</em> ) to ( <em>*tx</em>, <em>*ty</em> ) using the formulae: -<p> <pre> - *tx = m11*x + m21*y + dx (rounded to the nearest integer) - *ty = m22*y + m12*x + dy (rounded to the nearest integer) - </pre> - - -<p>Examples: <a href="tutorial1-14.html#x2434">t14/cannon.cpp</a> and <a href="xform-example.html#x1278">xform/xform.cpp</a>. -<h3 class=fn>void <a name="map-2"></a>TQWMatrix::map ( double x, double y, double * tx, double * ty ) const -</h3> -This is an overloaded member function, provided for convenience. It behaves essentially like the above function. -<p> Transforms ( <em>x</em>, <em>y</em> ) to ( <em>*tx</em>, <em>*ty</em> ) using the -following formulae: -<p> <pre> - *tx = m11*x + m21*y + dx - *ty = m22*y + m12*x + dy - </pre> - - -<h3 class=fn><a href="qpoint.html">TQPoint</a> <a name="map-3"></a>TQWMatrix::map ( const <a href="qpoint.html">TQPoint</a> & p ) const -</h3> - -<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function. -<p> Transforms <em>p</em> to using the formulae: -<p> <pre> - retx = m11*px + m21*py + dx (rounded to the nearest integer) - rety = m22*py + m12*px + dy (rounded to the nearest integer) - </pre> - - -<h3 class=fn><a href="qrect.html">TQRect</a> <a name="map-4"></a>TQWMatrix::map ( const <a href="qrect.html">TQRect</a> & r ) const -</h3> - -<p> <b>This function is obsolete.</b> It is provided to keep old source working. We strongly advise against using it in new code. -<p> Please use <a href="#mapRect">TQWMatrix::mapRect</a>() instead. -<p> Note that this method does return the bounding rectangle of the <em>r</em>, when -shearing or rotations are used. - -<h3 class=fn><a href="qpointarray.html">TQPointArray</a> <a name="map-5"></a>TQWMatrix::map ( const <a href="qpointarray.html">TQPointArray</a> & a ) const -</h3> - -<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function. -<p> Returns the point array <em>a</em> transformed by calling map for each point. - -<h3 class=fn><a href="qregion.html">TQRegion</a> <a name="map-6"></a>TQWMatrix::map ( const <a href="qregion.html">TQRegion</a> & r ) const -</h3> - -<p> This is an overloaded member function, provided for convenience. It behaves essentially like the above function. -<p> Transforms the region <em>r</em>. -<p> Calling this method can be rather expensive, if rotations or -shearing are used. - -<h3 class=fn><a href="qrect.html">TQRect</a> <a name="mapRect"></a>TQWMatrix::mapRect ( const <a href="qrect.html">TQRect</a> & rect ) const -</h3> -Returns the transformed rectangle <em>rect</em>. -<p> The bounding rectangle is returned if rotation or shearing has -been specified. -<p> If you need to know the exact region <em>rect</em> maps to use <a href="qsize.html#operator*-4">operator*</a>(). -<p> <p>See also <a href="qsize.html#operator*-4">operator*</a>(). - -<p>Example: <a href="xform-example.html#x1279">xform/xform.cpp</a>. -<h3 class=fn><a href="qpointarray.html">TQPointArray</a> <a name="mapToPolygon"></a>TQWMatrix::mapToPolygon ( const <a href="qrect.html">TQRect</a> & rect ) const -</h3> -Returns the transformed rectangle <em>rect</em> as a polygon. -<p> Polygons and rectangles behave slightly differently -when transformed (due to integer rounding), so -<tt>matrix.map( TQPointArray( rect ) )</tt> is not always the same as -<tt>matrix.mapToPolygon( rect )</tt>. - -<h3 class=fn><a href="qregion.html">TQRegion</a> <a name="mapToRegion"></a>TQWMatrix::mapToRegion ( const <a href="qrect.html">TQRect</a> & rect ) const -</h3> - -<p> Returns the transformed rectangle <em>rect</em>. -<p> A rectangle which has been rotated or sheared may result in a -non-rectangular region being returned. -<p> Calling this method can be expensive, if rotations or shearing are -used. If you just need to know the bounding rectangle of the -returned region, use <a href="#mapRect">mapRect</a>() which is a lot faster than this -function. -<p> <p>See also <a href="#mapRect">TQWMatrix::mapRect</a>(). - -<h3 class=fn>bool <a name="operator!-eq"></a>TQWMatrix::operator!= ( const <a href="qwmatrix.html">TQWMatrix</a> & m ) const -</h3> -Returns TRUE if this matrix is not equal to <em>m</em>; otherwise returns FALSE. - -<h3 class=fn><a href="qwmatrix.html">TQWMatrix</a> & <a name="operator*-eq"></a>TQWMatrix::operator*= ( const <a href="qwmatrix.html">TQWMatrix</a> & m ) -</h3> -Returns the result of multiplying this matrix by matrix <em>m</em>. - -<h3 class=fn>bool <a name="operator-eq-eq"></a>TQWMatrix::operator== ( const <a href="qwmatrix.html">TQWMatrix</a> & m ) const -</h3> -Returns TRUE if this matrix is equal to <em>m</em>; otherwise returns FALSE. - -<h3 class=fn>void <a name="reset"></a>TQWMatrix::reset () -</h3> -Resets the matrix to an identity matrix. -<p> All elements are set to zero, except <em>m11</em> and <em>m22</em> (scaling) -which are set to 1. -<p> <p>See also <a href="#isIdentity">isIdentity</a>(). - -<h3 class=fn><a href="qwmatrix.html">TQWMatrix</a> & <a name="rotate"></a>TQWMatrix::rotate ( double a ) -</h3> -Rotates the coordinate system <em>a</em> degrees counterclockwise. -<p> Returns a reference to the matrix. -<p> <p>See also <a href="#translate">translate</a>(), <a href="#scale">scale</a>(), and <a href="#shear">shear</a>(). - -<p>Examples: <a href="canvas-example.html#x2955">canvas/canvas.cpp</a>, <a href="desktop-example.html#x1764">desktop/desktop.cpp</a>, <a href="drawdemo-example.html#x1095">drawdemo/drawdemo.cpp</a>, <a href="tutorial1-14.html#x2435">t14/cannon.cpp</a>, and <a href="xform-example.html#x1280">xform/xform.cpp</a>. -<h3 class=fn><a href="qwmatrix.html">TQWMatrix</a> & <a name="scale"></a>TQWMatrix::scale ( double sx, double sy ) -</h3> -Scales the coordinate system unit by <em>sx</em> horizontally and <em>sy</em> -vertically. -<p> Returns a reference to the matrix. -<p> <p>See also <a href="#translate">translate</a>(), <a href="#shear">shear</a>(), and <a href="#rotate">rotate</a>(). - -<p>Examples: <a href="canvas-example.html#x2956">canvas/canvas.cpp</a>, <a href="fileiconview-example.html#x876">fileiconview/qfileiconview.cpp</a>, <a href="movies-example.html#x524">movies/main.cpp</a>, <a href="qmag-example.html#x1809">qmag/qmag.cpp</a>, <a href="showimg-example.html#x1357">showimg/showimg.cpp</a>, and <a href="xform-example.html#x1281">xform/xform.cpp</a>. -<h3 class=fn>void <a name="setMatrix"></a>TQWMatrix::setMatrix ( double m11, double m12, double m21, double m22, double dx, double dy ) -</h3> -Sets the matrix elements to the specified values, <em>m11</em>, <em>m12</em>, -<em>m21</em>, <em>m22</em>, <em>dx</em> and <em>dy</em>. - -<h3 class=fn>void <a name="setTransformationMode"></a>TQWMatrix::setTransformationMode ( <a href="qwmatrix.html#TransformationMode-enum">TQWMatrix::TransformationMode</a> m )<tt> [static]</tt> -</h3> -Sets the transformation mode that TQWMatrix and painter -transformations use to <em>m</em>. -<p> <p>See also <a href="#TransformationMode-enum">TQWMatrix::TransformationMode</a>. - -<h3 class=fn><a href="qwmatrix.html">TQWMatrix</a> & <a name="shear"></a>TQWMatrix::shear ( double sh, double sv ) -</h3> -Shears the coordinate system by <em>sh</em> horizontally and <em>sv</em> -vertically. -<p> Returns a reference to the matrix. -<p> <p>See also <a href="#translate">translate</a>(), <a href="#scale">scale</a>(), and <a href="#rotate">rotate</a>(). - -<p>Examples: <a href="drawdemo-example.html#x1096">drawdemo/drawdemo.cpp</a> and <a href="xform-example.html#x1282">xform/xform.cpp</a>. -<h3 class=fn><a href="qwmatrix.html#TransformationMode-enum">TransformationMode</a> <a name="transformationMode"></a>TQWMatrix::transformationMode ()<tt> [static]</tt> -</h3> -Returns the current transformation mode. -<p> <p>See also <a href="#TransformationMode-enum">TQWMatrix::TransformationMode</a>. - -<h3 class=fn><a href="qwmatrix.html">TQWMatrix</a> & <a name="translate"></a>TQWMatrix::translate ( double dx, double dy ) -</h3> -Moves the coordinate system <em>dx</em> along the X-axis and <em>dy</em> along -the Y-axis. -<p> Returns a reference to the matrix. -<p> <p>See also <a href="#scale">scale</a>(), <a href="#shear">shear</a>(), and <a href="#rotate">rotate</a>(). - -<p>Examples: <a href="canvas-example.html#x2957">canvas/canvas.cpp</a>, <a href="drawdemo-example.html#x1097">drawdemo/drawdemo.cpp</a>, <a href="tutorial1-14.html#x2436">t14/cannon.cpp</a>, and <a href="xform-example.html#x1283">xform/xform.cpp</a>. -<hr><h2>Related Functions</h2> -<h3 class=fn><a href="qdatastream.html">TQDataStream</a> & <a name="operator-lt-lt"></a>operator<< ( <a href="qdatastream.html">TQDataStream</a> & s, const <a href="qwmatrix.html">TQWMatrix</a> & m ) -</h3> - -<p> Writes the matrix <em>m</em> to the stream <em>s</em> and returns a reference -to the stream. -<p> <p>See also <a href="datastreamformat.html">Format of the TQDataStream operators</a>. - -<h3 class=fn><a href="qdatastream.html">TQDataStream</a> & <a name="operator-gt-gt"></a>operator>> ( <a href="qdatastream.html">TQDataStream</a> & s, <a href="qwmatrix.html">TQWMatrix</a> & m ) -</h3> - -<p> Reads the matrix <em>m</em> from the stream <em>s</em> and returns a reference -to the stream. -<p> <p>See also <a href="datastreamformat.html">Format of the TQDataStream operators</a>. - -<!-- eof --> -<hr><p> -This file is part of the <a href="index.html">TQt toolkit</a>. -Copyright © 1995-2007 -<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center> -<table width=100% cellspacing=0 border=0><tr> -<td>Copyright © 2007 -<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a> -<td align=right><div align=right>TQt 3.3.8</div> -</table></div></address></body> -</html> |