gdk-points-rectangles-and-regions.html

最新gtk中文资料集

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<td><p><span class="term"><em class="parameter"><code>region</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
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<td><p><span class="term"><em class="parameter"><code>rectangles</code></em>&#160;:</span></p></td>
<td> return location for an array of rectangles
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<td><p><span class="term"><em class="parameter"><code>n_rectangles</code></em>&#160;:</span></p></td>
<td> length of returned array
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<a name="id3081166"></a><h3>
<a name="gdk-region-empty"></a>gdk_region_empty ()</h3>
<a class="indexterm" name="id3081178"></a><pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a>            gdk_region_empty                    (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *region);</pre>
<p>
Finds out if the <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a> is empty.</p>
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<td><p><span class="term"><em class="parameter"><code>region</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"
><code class="literal">TRUE</code></a> if <em class="parameter"><code>region</code></em> is empty.
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<a name="id3081270"></a><h3>
<a name="gdk-region-equal"></a>gdk_region_equal ()</h3>
<a class="indexterm" name="id3081283"></a><pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a>            gdk_region_equal                    (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *region1,
                                                         <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *region2);</pre>
<p>
Finds out if the two regions are the same.</p>
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<td><p><span class="term"><em class="parameter"><code>region1</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
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<td><p><span class="term"><em class="parameter"><code>region2</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"
><code class="literal">TRUE</code></a> if <em class="parameter"><code>region1</code></em> and <em class="parameter"><code>region2</code></em> are equal.
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<a name="id3081403"></a><h3>
<a name="gdk-region-point-in"></a>gdk_region_point_in ()</h3>
<a class="indexterm" name="id3081416"></a><pre class="programlisting"><a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"
>gboolean</a>            gdk_region_point_in                 (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *region,
                                                         int x,
                                                         int y);</pre>
<p>
Finds out if a point is in a region.</p>
<p>

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<td><p><span class="term"><em class="parameter"><code>region</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
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<td><p><span class="term"><em class="parameter"><code>x</code></em>&#160;:</span></p></td>
<td> the x coordinate of a point
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<td><p><span class="term"><em class="parameter"><code>y</code></em>&#160;:</span></p></td>
<td> the y coordinate of a point
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> <a
href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"
><code class="literal">TRUE</code></a> if the point is in <em class="parameter"><code>region</code></em>.
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<a name="id3081542"></a><h3>
<a name="gdk-region-rect-in"></a>gdk_region_rect_in ()</h3>
<a class="indexterm" name="id3081555"></a><pre class="programlisting"><a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkOverlapType">GdkOverlapType</a>      gdk_region_rect_in                  (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *region,
                                                         <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRectangle">GdkRectangle</a> *rectangle);</pre>
<p>
Tests whether a rectangle is within a region.</p>
<p>

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<td><p><span class="term"><em class="parameter"><code>region</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>.
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<td><p><span class="term"><em class="parameter"><code>rectangle</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRectangle"><span class="type">GdkRectangle</span></a>.
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<td><p><span class="term"><span class="emphasis"><em>Returns</em></span>&#160;:</span></p></td>
<td> <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GDK-OVERLAP-RECTANGLE-IN:CAPS"><code class="literal">GDK_OVERLAP_RECTANGLE_IN</code></a>, <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GDK-OVERLAP-RECTANGLE-OUT:CAPS"><code class="literal">GDK_OVERLAP_RECTANGLE_OUT</code></a>, or
  <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GDK-OVERLAP-RECTANGLE-PART:CAPS"><code class="literal">GDK_OVERLAP_RECTANGLE_PART</code></a>, depending on whether the rectangle is inside,
  outside, or partly inside the <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>, respectively.
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<a name="id3081701"></a><h3>
<a name="GdkOverlapType"></a>enum GdkOverlapType</h3>
<a class="indexterm" name="id3081714"></a><pre class="programlisting">typedef enum
{
  GDK_OVERLAP_RECTANGLE_IN,
  GDK_OVERLAP_RECTANGLE_OUT,
  GDK_OVERLAP_RECTANGLE_PART
} GdkOverlapType;
</pre>
<p>
Specifies the possible values returned by <a class="link" href="gdk-Points-Rectangles-and-Regions.html#gdk-region-rect-in"><code class="function">gdk_region_rect_in()</code></a>.
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<td><p><span class="term"><a name="GDK-OVERLAP-RECTANGLE-IN:CAPS"></a><code class="literal">GDK_OVERLAP_RECTANGLE_IN</code></span></p></td>
<td>if the rectangle is inside the <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>.
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<td><p><span class="term"><a name="GDK-OVERLAP-RECTANGLE-OUT:CAPS"></a><code class="literal">GDK_OVERLAP_RECTANGLE_OUT</code></span></p></td>
<td>if the rectangle is outside the <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>.
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<td><p><span class="term"><a name="GDK-OVERLAP-RECTANGLE-PART:CAPS"></a><code class="literal">GDK_OVERLAP_RECTANGLE_PART</code></span></p></td>
<td>if the rectangle is partly inside the <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>.

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<div class="refsect2" lang="en">
<a name="id3081838"></a><h3>
<a name="gdk-region-offset"></a>gdk_region_offset ()</h3>
<a class="indexterm" name="id3081851"></a><pre class="programlisting">void                gdk_region_offset                   (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *region,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> dx,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> dy);</pre>
<p>
Moves a region the specified distance.</p>
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<td><p><span class="term"><em class="parameter"><code>region</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
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<td><p><span class="term"><em class="parameter"><code>dx</code></em>&#160;:</span></p></td>
<td> the distance to move the region horizontally
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<td><p><span class="term"><em class="parameter"><code>dy</code></em>&#160;:</span></p></td>
<td> the distance to move the region vertically
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<div class="refsect2" lang="en">
<a name="id3081953"></a><h3>
<a name="gdk-region-shrink"></a>gdk_region_shrink ()</h3>
<a class="indexterm" name="id3081967"></a><pre class="programlisting">void                gdk_region_shrink                   (<a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion">GdkRegion</a> *region,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> dx,
                                                         <a
href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"
>gint</a> dy);</pre>
<p>
Resizes a region by the specified amount.
Positive values shrink the region. Negative values expand it.</p>
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<td><p><span class="term"><em class="parameter"><code>region</code></em>&#160;:</span></p></td>
<td> a <a class="link" href="gdk-Points-Rectangles-and-Regions.html#GdkRegion"><span class="type">GdkRegion</span></a>
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<td><p><span class="term"><em class="parameter"><code>dx</code></em>&#160;:</span></p></td>
<td> the number of pixels to shrink the region horizontally
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<td><p><span class="term"><em class="parameter"><code>dy</code></em>&#160;:</span></p></td>
<td> the number of pixels to shrink the region vertically
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<div class="refsect2" lang="en">
<a name="id3082070"></a><h3>