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304 lines
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304 lines
17 KiB
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<!-- /home/espenr/tmp/qt-3.3.8-espenr-2499/qt-x11-free-3.3.8/src/canvas/qcanvas.cpp:2483 -->
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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>TQCanvasSprite Class Reference<br><small>[<a href="canvas.html">canvas module</a>]</small></h1>
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<p>The TQCanvasSprite class provides an animated canvas item on a TQCanvas.
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<a href="#details">More...</a>
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<p><tt>#include <<a href="qcanvas-h.html">ntqcanvas.h</a>></tt>
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<p>Inherits <a href="qcanvasitem.html">TQCanvasItem</a>.
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<p><a href="qcanvassprite-members.html">List of all member functions.</a>
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<h2>Public Members</h2>
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<ul>
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<li class=fn><a href="#TQCanvasSprite"><b>TQCanvasSprite</b></a> ( TQCanvasPixmapArray * a, TQCanvas * canvas )</li>
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<li class=fn>void <a href="#setSequence"><b>setSequence</b></a> ( TQCanvasPixmapArray * a )</li>
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<li class=fn>virtual <a href="#~TQCanvasSprite"><b>~TQCanvasSprite</b></a> ()</li>
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<li class=fn>virtual void <a href="#move"><b>move</b></a> ( double nx, double ny, int nf )</li>
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<li class=fn>void <a href="#setFrame"><b>setFrame</b></a> ( int f )</li>
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<li class=fn>enum <a href="#FrameAnimationType-enum"><b>FrameAnimationType</b></a> { Cycle, Oscillate }</li>
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<li class=fn>virtual void <a href="#setFrameAnimation"><b>setFrameAnimation</b></a> ( FrameAnimationType type = Cycle, int step = 1, int state = 0 )</li>
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<li class=fn>int <a href="#frame"><b>frame</b></a> () const</li>
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<li class=fn>int <a href="#frameCount"><b>frameCount</b></a> () const</li>
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<li class=fn>virtual int <a href="#rtti"><b>rtti</b></a> () const</li>
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<li class=fn>virtual TQRect <a href="#boundingRect"><b>boundingRect</b></a> () const</li>
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<li class=fn>int <a href="#width"><b>width</b></a> () const</li>
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<li class=fn>int <a href="#height"><b>height</b></a> () const</li>
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<li class=fn>int <a href="#leftEdge"><b>leftEdge</b></a> () const</li>
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<li class=fn>int <a href="#topEdge"><b>topEdge</b></a> () const</li>
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<li class=fn>int <a href="#rightEdge"><b>rightEdge</b></a> () const</li>
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<li class=fn>int <a href="#bottomEdge"><b>bottomEdge</b></a> () const</li>
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<li class=fn>int <a href="#leftEdge-2"><b>leftEdge</b></a> ( int nx ) const</li>
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<li class=fn>int <a href="#topEdge-2"><b>topEdge</b></a> ( int ny ) const</li>
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<li class=fn>int <a href="#rightEdge-2"><b>rightEdge</b></a> ( int nx ) const</li>
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<li class=fn>int <a href="#bottomEdge-2"><b>bottomEdge</b></a> ( int ny ) const</li>
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<li class=fn>TQCanvasPixmap * <a href="#image"><b>image</b></a> () const</li>
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<li class=fn>virtual TQCanvasPixmap * <a href="#imageAdvanced"><b>imageAdvanced</b></a> () const</li>
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<li class=fn>TQCanvasPixmap * <a href="#image-2"><b>image</b></a> ( int f ) const</li>
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<li class=fn>virtual void <a href="#advance"><b>advance</b></a> ( int phase )</li>
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<li class=fn>virtual void <a href="#draw"><b>draw</b></a> ( TQPainter & painter )</li>
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</ul>
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<hr><a name="details"></a><h2>Detailed Description</h2>
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The TQCanvasSprite class provides an animated canvas item on a <a href="ntqcanvas.html">TQCanvas</a>.
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<p>
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<p> A canvas sprite is an object which can contain any number of images
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(referred to as frames), only one of which is current, i.e.
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displayed, at any one time. The images can be passed in the
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constructor or set or changed later with <a href="#setSequence">setSequence</a>(). If you
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subclass TQCanvasSprite you can change the frame that is displayed
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periodically, e.g. whenever <a href="qcanvasitem.html#advance">TQCanvasItem::advance</a>(1) is called to
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create the effect of animation.
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<p> The current frame can be set with <a href="#setFrame">setFrame</a>() or with <a href="#move">move</a>(). The
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number of frames available is given by <a href="#frameCount">frameCount</a>(). The bounding
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rectangle of the current frame is returned by <a href="#boundingRect">boundingRect</a>().
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<p> The current frame's image can be retrieved with <a href="#image">image</a>(); use
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<a href="#imageAdvanced">imageAdvanced</a>() to retrieve the image for the frame that will be
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shown after <a href="#advance">advance</a>(1) is called. Use the image() overload passing
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it an integer index to retrieve a particular image from the list of
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frames.
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<p> Use <a href="#width">width</a>() and <a href="#height">height</a>() to retrieve the dimensions of the current
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frame.
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<p> Use <a href="#leftEdge">leftEdge</a>() and <a href="#rightEdge">rightEdge</a>() to retrieve the current frame's
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left-hand and right-hand x-coordinates respectively. Use
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<a href="#bottomEdge">bottomEdge</a>() and <a href="#topEdge">topEdge</a>() to retrieve the current frame's bottom
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and top y-coordinates respectively. These functions have an overload
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which will accept an integer frame number to retrieve the
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coordinates of a particular frame.
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<p> TQCanvasSprite draws very quickly, at the expense of memory.
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<p> The current frame's image can be drawn on a painter with <a href="#draw">draw</a>().
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<p> Like any other canvas item, canvas sprites can be moved with
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<a href="#move">move</a>() which sets the x and y coordinates and the frame number, as
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well as with <a href="qcanvasitem.html#move">TQCanvasItem::move</a>() and <a href="qcanvasitem.html#moveBy">TQCanvasItem::moveBy</a>(), or by
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setting coordinates with <a href="qcanvasitem.html#setX">TQCanvasItem::setX</a>(), <a href="qcanvasitem.html#setY">TQCanvasItem::setY</a>()
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and <a href="qcanvasitem.html#setZ">TQCanvasItem::setZ</a>().
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<p> <p>See also <a href="graphics.html">Graphics Classes</a> and <a href="images.html">Image Processing Classes</a>.
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<hr><h2>Member Type Documentation</h2>
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<h3 class=fn><a name="FrameAnimationType-enum"></a>TQCanvasSprite::FrameAnimationType</h3>
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<p> This enum is used to identify the different types of frame
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animation offered by TQCanvasSprite.
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<ul>
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<li><tt>TQCanvasSprite::Cycle</tt> - at each advance the frame number will be incremented by
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1 (modulo the frame count).
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<li><tt>TQCanvasSprite::Oscillate</tt> - at each advance the frame number will be
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incremented by 1 up to the frame count then decremented to by 1 to
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0, repeating this sequence forever.
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</ul>
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<hr><h2>Member Function Documentation</h2>
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<h3 class=fn><a name="TQCanvasSprite"></a>TQCanvasSprite::TQCanvasSprite ( <a href="qcanvaspixmaparray.html">TQCanvasPixmapArray</a> * a, <a href="ntqcanvas.html">TQCanvas</a> * canvas )
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</h3>
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Constructs a TQCanvasSprite which uses images from the
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<a href="qcanvaspixmaparray.html">TQCanvasPixmapArray</a> <em>a</em>.
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<p> The sprite in initially positioned at (0, 0) on <em>canvas</em>, using
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frame 0.
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<h3 class=fn><a name="~TQCanvasSprite"></a>TQCanvasSprite::~TQCanvasSprite ()<tt> [virtual]</tt>
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</h3>
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Destroys the sprite and removes it from the canvas. Does <em>not</em>
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delete the images.
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<h3 class=fn>void <a name="advance"></a>TQCanvasSprite::advance ( int phase )<tt> [virtual]</tt>
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</h3>
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Extends the default <a href="qcanvasitem.html">TQCanvasItem</a> implementation to provide the
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functionality of <a href="#setFrameAnimation">setFrameAnimation</a>().
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<p> The <em>phase</em> is 0 or 1: see <a href="qcanvasitem.html#advance">TQCanvasItem::advance</a>() for details.
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<p> <p>See also <a href="qcanvasitem.html#advance">TQCanvasItem::advance</a>() and <a href="qcanvasitem.html#setVelocity">setVelocity</a>().
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<p>Example: <a href="canvas-example.html#x2927">canvas/canvas.cpp</a>.
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<p>Reimplemented from <a href="qcanvasitem.html#advance">TQCanvasItem</a>.
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<h3 class=fn>int <a name="bottomEdge"></a>TQCanvasSprite::bottomEdge () const
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</h3>
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Returns the y-coordinate of the current bottom edge of the sprite.
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(This may change as the sprite animates since different frames may
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have different bottom edges.)
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<p> <p>See also <a href="#leftEdge">leftEdge</a>(), <a href="#rightEdge">rightEdge</a>(), and <a href="#topEdge">topEdge</a>().
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<h3 class=fn>int <a name="bottomEdge-2"></a>TQCanvasSprite::bottomEdge ( int ny ) const
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns what the y-coordinate of the top edge of the sprite would
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be if the sprite (actually its hotspot) were moved to y-position
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<em>ny</em>.
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<p> <p>See also <a href="#leftEdge">leftEdge</a>(), <a href="#rightEdge">rightEdge</a>(), and <a href="#topEdge">topEdge</a>().
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<h3 class=fn><a href="ntqrect.html">TQRect</a> <a name="boundingRect"></a>TQCanvasSprite::boundingRect () const<tt> [virtual]</tt>
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</h3>
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Returns the bounding rectangle for the image in the sprite's
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current frame. This assumes that the images are tightly cropped
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(i.e. do not have transparent pixels all along a side).
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<p>Reimplemented from <a href="qcanvasitem.html#boundingRect">TQCanvasItem</a>.
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<h3 class=fn>void <a name="draw"></a>TQCanvasSprite::draw ( <a href="ntqpainter.html">TQPainter</a> & painter )<tt> [virtual]</tt>
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</h3>
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Draws the current frame's image at the sprite's current position
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on painter <em>painter</em>.
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<p>Reimplemented from <a href="qcanvasitem.html#draw">TQCanvasItem</a>.
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<h3 class=fn>int <a name="frame"></a>TQCanvasSprite::frame () const
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</h3>
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<p> Returns the index of the current animation frame in the
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TQCanvasSprite's <a href="qcanvaspixmaparray.html">TQCanvasPixmapArray</a>.
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<p> <p>See also <a href="#setFrame">setFrame</a>() and <a href="#move">move</a>().
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<h3 class=fn>int <a name="frameCount"></a>TQCanvasSprite::frameCount () const
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</h3>
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<p> Returns the number of frames in the TQCanvasSprite's
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<a href="qcanvaspixmaparray.html">TQCanvasPixmapArray</a>.
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<h3 class=fn>int <a name="height"></a>TQCanvasSprite::height () const
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</h3>
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The height of the sprite for the current frame's image.
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<p> <p>See also <a href="#frame">frame</a>().
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<h3 class=fn><a href="qcanvaspixmap.html">TQCanvasPixmap</a> * <a name="image"></a>TQCanvasSprite::image () const
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</h3>
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<p> Returns the current frame's image.
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<p> <p>See also <a href="#frame">frame</a>() and <a href="#setFrame">setFrame</a>().
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<h3 class=fn><a href="qcanvaspixmap.html">TQCanvasPixmap</a> * <a name="image-2"></a>TQCanvasSprite::image ( int f ) const
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns the image for frame <em>f</em>. Does not do any bounds checking on <em>f</em>.
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<h3 class=fn><a href="qcanvaspixmap.html">TQCanvasPixmap</a> * <a name="imageAdvanced"></a>TQCanvasSprite::imageAdvanced () const<tt> [virtual]</tt>
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</h3>
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Returns the image the sprite <em>will</em> have after <a href="#advance">advance</a>(1) is
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called. By default this is the same as <a href="#image">image</a>().
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<h3 class=fn>int <a name="leftEdge"></a>TQCanvasSprite::leftEdge () const
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</h3>
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Returns the x-coordinate of the current left edge of the sprite.
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(This may change as the sprite animates since different frames may
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have different left edges.)
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<p> <p>See also <a href="#rightEdge">rightEdge</a>(), <a href="#bottomEdge">bottomEdge</a>(), and <a href="#topEdge">topEdge</a>().
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<h3 class=fn>int <a name="leftEdge-2"></a>TQCanvasSprite::leftEdge ( int nx ) const
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns what the x-coordinate of the left edge of the sprite would
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be if the sprite (actually its hotspot) were moved to x-position
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<em>nx</em>.
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<p> <p>See also <a href="#rightEdge">rightEdge</a>(), <a href="#bottomEdge">bottomEdge</a>(), and <a href="#topEdge">topEdge</a>().
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<h3 class=fn>void <a name="move"></a>TQCanvasSprite::move ( double nx, double ny, int nf )<tt> [virtual]</tt>
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</h3>
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<p> Set the position of the sprite to <em>nx</em>, <em>ny</em> and the current
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frame to <em>nf</em>. <em>nf</em> will be ignored if it is larger than
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<a href="#frameCount">frameCount</a>() or smaller than 0.
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<h3 class=fn>int <a name="rightEdge"></a>TQCanvasSprite::rightEdge () const
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</h3>
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Returns the x-coordinate of the current right edge of the sprite.
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(This may change as the sprite animates since different frames may
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have different right edges.)
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<p> <p>See also <a href="#leftEdge">leftEdge</a>(), <a href="#bottomEdge">bottomEdge</a>(), and <a href="#topEdge">topEdge</a>().
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<h3 class=fn>int <a name="rightEdge-2"></a>TQCanvasSprite::rightEdge ( int nx ) const
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns what the x-coordinate of the right edge of the sprite
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would be if the sprite (actually its hotspot) were moved to
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x-position <em>nx</em>.
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<p> <p>See also <a href="#leftEdge">leftEdge</a>(), <a href="#bottomEdge">bottomEdge</a>(), and <a href="#topEdge">topEdge</a>().
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<h3 class=fn>int <a name="rtti"></a>TQCanvasSprite::rtti () const<tt> [virtual]</tt>
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</h3>
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Returns 1 (TQCanvasItem::Rtti_Sprite).
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<p> <p>See also <a href="qcanvasitem.html#rtti">TQCanvasItem::rtti</a>().
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<p>Example: <a href="canvas-example.html#x2928">canvas/canvas.cpp</a>.
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<p>Reimplemented from <a href="qcanvasitem.html#rtti">TQCanvasItem</a>.
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<h3 class=fn>void <a name="setFrame"></a>TQCanvasSprite::setFrame ( int f )
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</h3>
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Sets the animation frame used for displaying the sprite to <em>f</em>,
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an index into the TQCanvasSprite's <a href="qcanvaspixmaparray.html">TQCanvasPixmapArray</a>. The call
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will be ignored if <em>f</em> is larger than <a href="#frameCount">frameCount</a>() or smaller
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than 0.
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<p> <p>See also <a href="#frame">frame</a>() and <a href="#move">move</a>().
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<h3 class=fn>void <a name="setFrameAnimation"></a>TQCanvasSprite::setFrameAnimation ( <a href="qcanvassprite.html#FrameAnimationType-enum">FrameAnimationType</a> type = Cycle, int step = 1, int state = 0 )<tt> [virtual]</tt>
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</h3>
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Sets the animation characteristics for the sprite.
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<p> For <em>type</em> == <a href="#FrameAnimationType-enum">Cycle</a>, the frames will increase by <em>step</em>
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at each advance, modulo the <a href="#frameCount">frameCount</a>().
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<p> For <em>type</em> == <a href="#FrameAnimationType-enum">Oscillate</a>, the frames will increase by <em>step</em>
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at each advance, up to the frameCount(), then decrease by <em>step</em>
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back to 0, repeating forever.
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<p> The <em>state</em> parameter is for internal use.
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<h3 class=fn>void <a name="setSequence"></a>TQCanvasSprite::setSequence ( <a href="qcanvaspixmaparray.html">TQCanvasPixmapArray</a> * a )
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</h3>
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Set the array of images used for displaying the sprite to the
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<a href="qcanvaspixmaparray.html">TQCanvasPixmapArray</a> <em>a</em>.
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<p> If the current <a href="#frame">frame</a>() is larger than the number of images in <em>a</em>, the current frame will be reset to 0.
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<h3 class=fn>int <a name="topEdge"></a>TQCanvasSprite::topEdge () const
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</h3>
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Returns the y-coordinate of the top edge of the sprite. (This may
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change as the sprite animates since different frames may have
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different top edges.)
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<p> <p>See also <a href="#leftEdge">leftEdge</a>(), <a href="#rightEdge">rightEdge</a>(), and <a href="#bottomEdge">bottomEdge</a>().
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<h3 class=fn>int <a name="topEdge-2"></a>TQCanvasSprite::topEdge ( int ny ) const
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</h3>
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This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
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<p> Returns what the y-coordinate of the top edge of the sprite would
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be if the sprite (actually its hotspot) were moved to y-position
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<em>ny</em>.
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<p> <p>See also <a href="#leftEdge">leftEdge</a>(), <a href="#rightEdge">rightEdge</a>(), and <a href="#bottomEdge">bottomEdge</a>().
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<h3 class=fn>int <a name="width"></a>TQCanvasSprite::width () const
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</h3>
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The width of the sprite for the current frame's image.
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<p> <p>See also <a href="#frame">frame</a>().
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<!-- eof -->
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<hr><p>
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This file is part of the <a href="index.html">TQt toolkit</a>.
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Copyright © 1995-2007
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<a href="http://www.trolltech.com/">Trolltech</a>. All Rights Reserved.<p><address><hr><div align=center>
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<table width=100% cellspacing=0 border=0><tr>
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<td>Copyright © 2007
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<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
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<td align=right><div align=right>TQt 3.3.8</div>
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</table></div></address></body>
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</html>
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