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+<title>Sly: Window Creation</title>
+
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+<a name="Window-Creation"></a>
+<div class="header">
+<p>
+Next: <a href="The-Game-Loop.html#The-Game-Loop" accesskey="n" rel="next">The Game Loop</a>, Up: <a href="Booting.html#Booting" accesskey="u" rel="up">Booting</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+<hr>
+<a name="Window-Creation-1"></a>
+<h4 class="subsection">4.1.1 Window Creation</h4>
+
+<div class="example">
+<pre class="example">(use-modules (sly window))
+</pre></div>
+
+<p>Sly uses the windowing features of SDL 1.2 under the hood, which
+currently restricts Sly applications to using only a single window.
+SDL2 support will come in a future release.
+</p>
+<p>The window data structure:
+</p>
+<dl>
+<dt><a name="index-make_002dwindow"></a>Scheme Procedure: <strong>make-window</strong> <em>[<var>#:title</var>] [<var>#:resolution</var>] [<var>#:fullscreen?</var>]</em></dt>
+<dd><p>Create a new window object.  <code>title</code> is a string to display in
+the window&rsquo;s title bar.  <code>resolution</code> is a 2D vector that
+specifies the dimensions of the window in pixels.  <code>fullscreen?</code>
+is a boolean that toggles fullscreen mode.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-window_003f"></a>Scheme Procedure: <strong>window?</strong> <em><var>obj</var></em></dt>
+<dd><p>Return <code>#t</code> if <code>obj</code> is a window.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-window_002dtitle"></a>Scheme Procedure: <strong>window-title</strong> <em><var>window</var></em></dt>
+<dd><p>Return the title of <code>window</code>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-window_002dresolution"></a>Scheme Procedure: <strong>window-resolution</strong> <em><var>window</var></em></dt>
+<dd><p>Return the resolution of <code>window</code>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-window_002dfullscreen_003f"></a>Scheme Procedure: <strong>window-fullscreen?</strong> <em><var>window</var></em></dt>
+<dd><p>Return <code>#t</code> if <code>window</code> is set to fullscreen mode.
+</p></dd></dl>
+
+<p>The following signals hold the state of the current window:
+</p>
+<dl>
+<dt><a name="index-window_002dwidth"></a>Scheme Signal: <strong>window-width</strong></dt>
+<dd><p>The width of the current window.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-window_002dheight"></a>Scheme Signal: <strong>window-height</strong></dt>
+<dd><p>The height of the current window.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-window_002dsize"></a>Scheme Signal: <strong>window-size</strong></dt>
+<dd><p>The size of the current window as a 2D vector.
+</p></dd></dl>
+
+<p>In addition to signals, the following hooks are triggered upon certain
+changes to window state:
+</p>
+<dl>
+<dt><a name="index-window_002dresize_002dhook"></a>Scheme Variable: <strong>window-resize-hook</strong></dt>
+<dd><p>This hook is run when the current window is resized.  Procedures added
+to this hook should accept two arguments: Numbers <code>width</code> and
+<code>height</code>, the new dimensions of the window in pixels.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-window_002dclose_002dhook"></a>Scheme Variable: <strong>window-close-hook</strong></dt>
+<dd><p>This hook is run when the close button is clicked.  Note that this
+event is simply a request from the user to close the window, it does
+not mean that the window has actually been closed.  Procedures added
+to this hook should accept no arguments.
+</p></dd></dl>
+
+<p>The following procedures are used to open/close windows:
+</p>
+<dl>
+<dt><a name="index-open_002dwindow"></a>Scheme Procedure: <strong>open-window</strong> <em>[<var>window</var>]</em></dt>
+<dd><p>Open the game window using the settings in <code>window</code>.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-close_002dwindow"></a>Scheme Procedure: <strong>close-window</strong></dt>
+<dd><p>Close the currently open window.
+</p></dd></dl>
+
+<dl>
+<dt><a name="index-with_002dwindow"></a>Scheme Syntax: <strong>with-window</strong> <em><var>window</var> <var>body</var> &hellip;</em></dt>
+<dd><p>Evaluate <code>body</code> in the context of <code>window</code>.  <code>window</code>
+is opened before evaluating <code>body</code>, and closed afterwards.
+</p></dd></dl>
+
+<hr>
+<div class="header">
+<p>
+Next: <a href="The-Game-Loop.html#The-Game-Loop" accesskey="n" rel="next">The Game Loop</a>, Up: <a href="Booting.html#Booting" accesskey="u" rel="up">Booting</a> &nbsp; [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Index.html#Index" title="Index" rel="index">Index</a>]</p>
+</div>
+
+
+
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+</html>