view docs/ref/joystick.html @ 3172:d1b367fc08bc tests-returncode

Use a return code of 1 when the tests fail.
author Thomas Kluyver <takowl@gmail.com>
date Wed, 09 Jan 2013 10:13:57 +0000
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<div class="section" id="module-pygame.joystick">
<span id="pygame-joystick"></span><dl class="definition module">
<dt class="title module">
<tt class="docutils literal"><span class="pre">pygame.joystick</span></tt></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">pygame module for interacting with joystick devices</span></div>
</div>
<table border="1" class="toc docutils">
<colgroup>
<col width="34%" />
<col width="1%" />
<col width="65%" />
</colgroup>
<tbody valign="top">
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.init">pygame.joystick.init</a></td>
<td>—</td>
<td>initialize the joystick module</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.quit">pygame.joystick.quit</a></td>
<td>—</td>
<td>uninitialize the joystick module</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.get_init">pygame.joystick.get_init</a></td>
<td>—</td>
<td>true if the joystick module is initialized</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.get_count">pygame.joystick.get_count</a></td>
<td>—</td>
<td>number of joysticks on the system</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick">pygame.joystick.Joystick</a></td>
<td>—</td>
<td>create a new Joystick object</td>
</tr>
</tbody>
</table>
<p>The joystick module manages the joystick devices on a computer (there can be
more than one). Joystick devices include trackballs and video-game-style
gamepads, and the module allows the use of multiple buttons and &#8220;hats&#8221;.</p>
<p>To get initialise the joystick module and get a list of Joystick instances
use the following code:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="n">pygame</span><span class="o">.</span><span class="n">joystick</span><span class="o">.</span><span class="n">init</span><span class="p">()</span>
<span class="n">joysticks</span> <span class="o">=</span> <span class="p">[</span><span class="n">pygame</span><span class="o">.</span><span class="n">joystick</span><span class="o">.</span><span class="n">Joystick</span><span class="p">(</span><span class="n">x</span><span class="p">)</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">pygame</span><span class="o">.</span><span class="n">joystick</span><span class="o">.</span><span class="n">get_count</span><span class="p">())]</span>
</pre></div>
</div>
<p>The following event types will be generated by the joysticks</p>
<div class="highlight-python"><pre>JOYAXISMOTION JOYBALLMOTION JOYBUTTONDOWN JOYBUTTONUP JOYHATMOTION</pre>
</div>
<p>The event queue needs to be pumped frequently for some of the methods to work.
So call one of pygame.event.get, pygame.event.wait, or pygame.event.pump regularly.</p>
<dl class="definition function">
<dt class="title" id="pygame.joystick.init">
<tt class="descclassname">pygame.joystick.</tt><tt class="descname">init</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.init" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">initialize the joystick module</span></div>
<div class="line"><span class="signature">init() -&gt; None</span></div>
</div>
<p>This function is called automatically by <tt class="docutils literal"><span class="pre">pygame.init()</span></tt>.</p>
<p>It initializes the joystick module. This will scan the system for all
joystick devices. The module must be initialized before any other functions
will work.</p>
<p>It is safe to call this function more than once.</p>
</dd></dl>

<dl class="definition function">
<dt class="title" id="pygame.joystick.quit">
<tt class="descclassname">pygame.joystick.</tt><tt class="descname">quit</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.quit" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">uninitialize the joystick module</span></div>
<div class="line"><span class="signature">quit() -&gt; None</span></div>
</div>
<p>Uninitialize the joystick module. After you call this any existing joystick
objects will no longer work.</p>
<p>It is safe to call this function more than once.</p>
</dd></dl>

<dl class="definition function">
<dt class="title" id="pygame.joystick.get_init">
<tt class="descclassname">pygame.joystick.</tt><tt class="descname">get_init</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.get_init" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">true if the joystick module is initialized</span></div>
<div class="line"><span class="signature">get_init() -&gt; bool</span></div>
</div>
<p>Test if the <tt class="docutils literal"><span class="pre">pygame.joystick.init()</span></tt> function has been called.</p>
</dd></dl>

<dl class="definition function">
<dt class="title" id="pygame.joystick.get_count">
<tt class="descclassname">pygame.joystick.</tt><tt class="descname">get_count</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.get_count" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">number of joysticks on the system</span></div>
<div class="line"><span class="signature">get_count() -&gt; count</span></div>
</div>
<p>Return the number of joystick devices on the system. The count will be 0 if
there are no joysticks on the system.</p>
<p>When you create Joystick objects using <tt class="docutils literal"><span class="pre">Joystick(id)</span></tt>, you pass an integer
that must be lower than this count.</p>
</dd></dl>

<dl class="definition class">
<dt class="title" id="pygame.joystick.Joystick">
<em class="property">class </em><tt class="descclassname">pygame.joystick.</tt><tt class="descname">Joystick</tt><a class="headerlink" href="#pygame.joystick.Joystick" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">create a new Joystick object</span></div>
<div class="line"><span class="signature">Joystick(id) -&gt; Joystick</span></div>
</div>
<table border="1" class="toc docutils">
<colgroup>
<col width="43%" />
<col width="1%" />
<col width="56%" />
</colgroup>
<tbody valign="top">
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.init">pygame.joystick.Joystick.init</a></td>
<td>—</td>
<td>initialize the Joystick</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.quit">pygame.joystick.Joystick.quit</a></td>
<td>—</td>
<td>uninitialize the Joystick</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_init">pygame.joystick.Joystick.get_init</a></td>
<td>—</td>
<td>check if the Joystick is initialized</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_id">pygame.joystick.Joystick.get_id</a></td>
<td>—</td>
<td>get the Joystick ID</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_name">pygame.joystick.Joystick.get_name</a></td>
<td>—</td>
<td>get the Joystick system name</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_numaxes">pygame.joystick.Joystick.get_numaxes</a></td>
<td>—</td>
<td>get the number of axes on a Joystick</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_axis">pygame.joystick.Joystick.get_axis</a></td>
<td>—</td>
<td>get the current position of an axis</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_numballs">pygame.joystick.Joystick.get_numballs</a></td>
<td>—</td>
<td>get the number of trackballs on a Joystick</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_ball">pygame.joystick.Joystick.get_ball</a></td>
<td>—</td>
<td>get the relative position of a trackball</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_numbuttons">pygame.joystick.Joystick.get_numbuttons</a></td>
<td>—</td>
<td>get the number of buttons on a Joystick</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_button">pygame.joystick.Joystick.get_button</a></td>
<td>—</td>
<td>get the current button state</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_numhats">pygame.joystick.Joystick.get_numhats</a></td>
<td>—</td>
<td>get the number of hat controls on a Joystick</td>
</tr>
<tr><td><a class="toc reference external" href="joystick.html#pygame.joystick.Joystick.get_hat">pygame.joystick.Joystick.get_hat</a></td>
<td>—</td>
<td>get the position of a joystick hat</td>
</tr>
</tbody>
</table>
<p>Create a new joystick to access a physical device. The id argument must be a
value from 0 to pygame.joystick.get_count()-1.</p>
<p>To access most of the Joystick methods, you&#8217;ll need to <tt class="docutils literal"><span class="pre">init()</span></tt> the
Joystick. This is separate from making sure the joystick module is
initialized. When multiple Joysticks objects are created for the same
physical joystick device (i.e., they have the same <tt class="docutils literal"><span class="pre">ID</span></tt> number), the state
and values for those Joystick objects will be shared.</p>
<p>The Joystick object allows you to get information about the types of
controls on a joystick device. Once the device is initialized the Pygame
event queue will start receiving events about its input.</p>
<p>You can call the <tt class="docutils literal"><span class="pre">Joystick.get_name()</span></tt> and <tt class="docutils literal"><span class="pre">Joystick.get_id()</span></tt> functions
without initializing the Joystick object.</p>
<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.init">
<tt class="descname">init</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.init" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">initialize the Joystick</span></div>
<div class="line"><span class="signature">init() -&gt; None</span></div>
</div>
<p>The Joystick must be initialized to get most of the information about the
controls. While the Joystick is initialized the Pygame event queue will
receive events from the Joystick input.</p>
<p>It is safe to call this more than once.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.quit">
<tt class="descname">quit</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.quit" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">uninitialize the Joystick</span></div>
<div class="line"><span class="signature">quit() -&gt; None</span></div>
</div>
<p>This will unitialize a Joystick. After this the Pygame event queue will
no longer receive events from the device.</p>
<p>It is safe to call this more than once.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_init">
<tt class="descname">get_init</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_init" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">check if the Joystick is initialized</span></div>
<div class="line"><span class="signature">get_init() -&gt; bool</span></div>
</div>
<p>Returns True if the <tt class="docutils literal"><span class="pre">init()</span></tt> method has already been called on this
Joystick object.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_id">
<tt class="descname">get_id</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_id" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">get the Joystick ID</span></div>
<div class="line"><span class="signature">get_id() -&gt; int</span></div>
</div>
<p>Returns the integer <tt class="docutils literal"><span class="pre">ID</span></tt> that represents this device. This is the same
value that was passed to the <tt class="docutils literal"><span class="pre">Joystick()</span></tt> constructor. This method can
safely be called while the Joystick is not initialized.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_name">
<tt class="descname">get_name</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_name" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">get the Joystick system name</span></div>
<div class="line"><span class="signature">get_name() -&gt; string</span></div>
</div>
<p>Returns the system name for this joystick device. It is unknown what name
the system will give to the Joystick, but it should be a unique name that
identifies the device. This method can safely be called while the
Joystick is not initialized.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_numaxes">
<tt class="descname">get_numaxes</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_numaxes" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">get the number of axes on a Joystick</span></div>
<div class="line"><span class="signature">get_numaxes() -&gt; int</span></div>
</div>
<p>Returns the number of input axes are on a Joystick. There will usually be
two for the position. Controls like rudders and throttles are treated as
additional axes.</p>
<p>The <tt class="docutils literal"><span class="pre">pygame.JOYAXISMOTION</span></tt> events will be in the range from -1.0 to
1.0. A value of 0.0 means the axis is centered. Gamepad devices will
usually be -1, 0, or 1 with no values in between. Older analog joystick
axes will not always use the full -1 to 1 range, and the centered value
will be some area around 0. Analog joysticks usually have a bit of noise
in their axis, which will generate a lot of rapid small motion events.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_axis">
<tt class="descname">get_axis</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_axis" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">get the current position of an axis</span></div>
<div class="line"><span class="signature">get_axis(axis_number) -&gt; float</span></div>
</div>
<p>Returns the current position of a joystick axis. The value will range
from -1 to 1 with a value of 0 being centered. You may want to take into
account some tolerance to handle jitter, and joystick drift may keep the
joystick from centering at 0 or using the full range of position values.</p>
<p>The axis number must be an integer from zero to get_numaxes()-1.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_numballs">
<tt class="descname">get_numballs</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_numballs" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">get the number of trackballs on a Joystick</span></div>
<div class="line"><span class="signature">get_numballs() -&gt; int</span></div>
</div>
<p>Returns the number of trackball devices on a Joystick. These devices work
similar to a mouse but they have no absolute position; they only have
relative amounts of movement.</p>
<p>The <tt class="docutils literal"><span class="pre">pygame.JOYBALLMOTION</span></tt> event will be sent when the trackball is
rolled. It will report the amount of movement on the trackball.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_ball">
<tt class="descname">get_ball</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_ball" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">get the relative position of a trackball</span></div>
<div class="line"><span class="signature">get_ball(ball_number) -&gt; x, y</span></div>
</div>
<p>Returns the relative movement of a joystick button. The value is a x, y
pair holding the relative movement since the last call to get_ball.</p>
<p>The ball number must be an integer from zero to get_numballs()-1.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_numbuttons">
<tt class="descname">get_numbuttons</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_numbuttons" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">get the number of buttons on a Joystick</span></div>
<div class="line"><span class="signature">get_numbuttons() -&gt; int</span></div>
</div>
<p>Returns the number of pushable buttons on the joystick. These buttons
have a boolean (on or off) state.</p>
<p>Buttons generate a <tt class="docutils literal"><span class="pre">pygame.JOYBUTTONDOWN</span></tt> and <tt class="docutils literal"><span class="pre">pygame.JOYBUTTONUP</span></tt>
event when they are pressed and released.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_button">
<tt class="descname">get_button</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_button" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">get the current button state</span></div>
<div class="line"><span class="signature">get_button(button) -&gt; bool</span></div>
</div>
<p>Returns the current state of a joystick button.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_numhats">
<tt class="descname">get_numhats</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_numhats" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">get the number of hat controls on a Joystick</span></div>
<div class="line"><span class="signature">get_numhats() -&gt; int</span></div>
</div>
<p>Returns the number of joystick hats on a Joystick. Hat devices are like
miniature digital joysticks on a joystick. Each hat has two axes of
input.</p>
<p>The <tt class="docutils literal"><span class="pre">pygame.JOYHATMOTION</span></tt> event is generated when the hat changes
position. The position attribute for the event contains a pair of values
that are either -1, 0, or 1. A position of (0, 0) means the hat is
centered.</p>
</dd></dl>

<dl class="definition method">
<dt class="title" id="pygame.joystick.Joystick.get_hat">
<tt class="descname">get_hat</tt><big>(</big><big>)</big><a class="headerlink" href="#pygame.joystick.Joystick.get_hat" title="Permalink to this definition">¶</a></dt>
<dd><div class="line-block">
<div class="line"><span class="summaryline">get the position of a joystick hat</span></div>
<div class="line"><span class="signature">get_hat(hat_number) -&gt; x, y</span></div>
</div>
<p>Returns the current position of a position hat. The position is given as
two values representing the <tt class="docutils literal"><span class="pre">X</span></tt> and <tt class="docutils literal"><span class="pre">Y</span></tt> position for the hat. (0, 0)
means centered. A value of -1 means left/down and a value of 1 means
right/up: so (-1, 0) means left; (1, 0) means right; (0, 1) means up; (1,
1) means upper-right; etc.</p>
<p>This value is digital, <tt class="docutils literal"><span class="pre">i.e.</span></tt>, each coordinate can be -1, 0 or 1 but
never in-between.</p>
<p>The hat number must be between 0 and get_numhats()-1.</p>
</dd></dl>

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