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gnome-chemistry-utils-devel-0.14.2-1.mga3.x86_64.rpm

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   &#160;<span id="projectnumber">0.14.2</span>
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<li class="navelem"><a class="el" href="namespacegccv.html">gccv</a></li><li class="navelem"><a class="el" href="classgccv_1_1Canvas.html">Canvas</a></li>  </ul>
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<p>the <a class="el" href="classgccv_1_1Canvas.html" title="the Canvas class">Canvas</a> class  
 <a href="classgccv_1_1Canvas.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="canvas_8h_source.html">gccv/canvas.h</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a4b9637a724856b2dc795a772028ba5dc"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a4b9637a724856b2dc795a772028ba5dc">Canvas</a> (<a class="el" href="classgccv_1_1Client.html">Client</a> *client)</td></tr>
<tr class="memitem:a5ea9738914d080b8a2c9dc883305a051"><td class="memItemLeft" align="right" valign="top">virtual&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a5ea9738914d080b8a2c9dc883305a051">~Canvas</a> ()</td></tr>
<tr class="memitem:a2b61387ba3712364f3426312af355c13"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgccv_1_1Item.html">Item</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a2b61387ba3712364f3426312af355c13">GetItemAt</a> (double x, double y)</td></tr>
<tr class="memitem:abe754b47999e9b2602bb5de557e584b4"><td class="memItemLeft" align="right" valign="top">GtkWidget *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#abe754b47999e9b2602bb5de557e584b4">GetWidget</a> ()</td></tr>
<tr class="memitem:a1be66442953e6b59d259b6c1634c15d9"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a1be66442953e6b59d259b6c1634c15d9">Invalidate</a> (double x0, double y0, double x1, double y1)</td></tr>
<tr class="memitem:aaa03a591444f581f3ddc58f08d2fd46a"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#aaa03a591444f581f3ddc58f08d2fd46a">SetBackgroundColor</a> (GOColor color)</td></tr>
<tr class="memitem:a822c294b145b0a080ce1b1d4ce5c8106"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a822c294b145b0a080ce1b1d4ce5c8106">SetZoom</a> (double zoom)</td></tr>
<tr class="memitem:a7e2a0a56504b4b85e517de52cc45f60a"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a7e2a0a56504b4b85e517de52cc45f60a">Render</a> (cairo_t *cr, bool is_vector)</td></tr>
<tr class="memitem:af3c2b14bc6e4368316956e1095e5d5dd"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#af3c2b14bc6e4368316956e1095e5d5dd">GetZoom</a> (void) const </td></tr>
<tr class="memitem:a3ee6c326b4c13ab52d68773d8ca30089"><td class="memItemLeft" align="right" valign="top"><a class="el" href="classgccv_1_1Group.html">Group</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a3ee6c326b4c13ab52d68773d8ca30089">GetRoot</a> (void) const </td></tr>
<tr class="memitem:a90d162834d7c7f44c4b18808322bbdff"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a90d162834d7c7f44c4b18808322bbdff">SetGap</a> (double val)</td></tr>
<tr class="memitem:a918d29c610961f1987a528454ffef135"><td class="memItemLeft" align="right" valign="top">double&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a918d29c610961f1987a528454ffef135">GetGap</a> (void) const </td></tr>
<tr class="memitem:ac7b0f8891421fca82b6abfb4fd69c920"><td class="memItemLeft" align="right" valign="top">double &amp;&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#ac7b0f8891421fca82b6abfb4fd69c920">GetRefGap</a> (void)</td></tr>
<tr class="memitem:adef3747078fceb0f2948cfe18f5b8b9c"><td class="memItemLeft" align="right" valign="top">GOColor&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#adef3747078fceb0f2948cfe18f5b8b9c">GetColor</a> (void) const </td></tr>
<tr class="memitem:a8e0191014a75bf5a8e3669f760817c4b"><td class="memItemLeft" align="right" valign="top">GOColor&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a8e0191014a75bf5a8e3669f760817c4b">GetBackgroundColor</a> (void) const </td></tr>
<tr class="memitem:a16a390e818e174073f2494af90a35fde"><td class="memItemLeft" align="right" valign="top">unsigned&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classgccv_1_1Canvas.html#a16a390e818e174073f2494af90a35fde">GetLastEventState</a> (void) const </td></tr>
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<a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>the <a class="el" href="classgccv_1_1Canvas.html" title="the Canvas class">Canvas</a> class </p>
<p>This class is the container class for the items and is the only one interacting with the underlying Gtk+ framework. It uses a private widget derived from GtkDrawingArea. </p>

<p>Definition at line <a class="el" href="canvas_8h_source.html#l00053">53</a> of file <a class="el" href="canvas_8h_source.html">canvas.h</a>.</p>
</div><h2>Constructor &amp; Destructor Documentation</h2>
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          <td>(</td>
          <td class="paramtype"><a class="el" href="classgccv_1_1Client.html">Client</a> *&#160;</td>
          <td class="paramname"><em>client</em></td><td>)</td>
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<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">client</td><td>the <a class="el" href="classgccv_1_1Client.html" title="The document associated with the canvas.">gccv::Client</a> for the canvas or NULL.</td></tr>
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<p>Constructs a canvas for <em>client</em> which is mandatory if some interaction with the canvas is needed. </p>

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          <td class="memname">virtual gccv::Canvas::~Canvas </td>
          <td>(</td>
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<p>The destructor. You should not delete the canvas, as it will be destroyed with the enclosing widget. Instead, if you never show the widget in a window, use: </p>
<div class="fragment"><div class="line">gtk_widget_destroy (canvas-&gt;GetWidget ());</div>
</div><!-- fragment --><p>Items are stored in an ordered tree whose top node is a <a class="el" href="classgccv_1_1Group.html" title="Item with Item children.">gccv::Group</a> instance which can be accessed by the <a class="el" href="classgccv_1_1Canvas.html#a3ee6c326b4c13ab52d68773d8ca30089">GetRoot()</a> method. </p>

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<h2>Member Function Documentation</h2>
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<dl class="section return"><dt>Returns</dt><dd>the background color. </dd></dl>

<p>Definition at line <a class="el" href="canvas_8h_source.html#l00159">159</a> of file <a class="el" href="canvas_8h_source.html">canvas.h</a>.</p>

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<dl class="section return"><dt>Returns</dt><dd>the foreground color. </dd></dl>

<p>Definition at line <a class="el" href="canvas_8h_source.html#l00152">152</a> of file <a class="el" href="canvas_8h_source.html">canvas.h</a>.</p>

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          <td>(</td>
          <td class="paramtype">void&#160;</td>
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<dl class="section return"><dt>Returns</dt><dd>the current gap for the canvas. </dd></dl>

<p>Definition at line <a class="el" href="canvas_8h_source.html#l00148">148</a> of file <a class="el" href="canvas_8h_source.html">canvas.h</a>.</p>

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          <td class="memname"><a class="el" href="classgccv_1_1Item.html">Item</a>* gccv::Canvas::GetItemAt </td>
          <td>(</td>
          <td class="paramtype">double&#160;</td>
          <td class="paramname"><em>x</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">double&#160;</td>
          <td class="paramname"><em>y</em>&#160;</td>
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          <td>)</td>
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<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">x</td><td>the x coordiante. </td></tr>
    <tr><td class="paramname">y</td><td>the y coordinate.</td></tr>
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<p>Used to get the top item at or near the given position. </p>
<dl class="section return"><dt>Returns</dt><dd>the found item or NULL if no item is nearer than the current gap from the given position. </dd></dl>

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          <td class="paramname"></td><td>)</td>
          <td> const</td>
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<dl class="section return"><dt>Returns</dt><dd>the GdkModifierType value for the last received event. </dd></dl>

<p>Definition at line <a class="el" href="canvas_8h_source.html#l00163">163</a> of file <a class="el" href="canvas_8h_source.html">canvas.h</a>.</p>

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          <td class="paramtype">void&#160;</td>
          <td class="paramname"></td><td>)</td>
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<dl class="section return"><dt>Returns</dt><dd>the current gap for the canvas as a reference. </dd></dl>

<p>Definition at line <a class="el" href="canvas_8h_source.html#l00148">148</a> of file <a class="el" href="canvas_8h_source.html">canvas.h</a>.</p>

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          <td>(</td>
          <td class="paramtype">void&#160;</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
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<dl class="section return"><dt>Returns</dt><dd>the root item. </dd></dl>

<p>Definition at line <a class="el" href="canvas_8h_source.html#l00130">130</a> of file <a class="el" href="canvas_8h_source.html">canvas.h</a>.</p>

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          <td>(</td>
          <td class="paramtype">void&#160;</td>
          <td class="paramname"></td><td>)</td>
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<dl class="section return"><dt>Returns</dt><dd>the widget used by the canvas. </dd></dl>

<p>Definition at line <a class="el" href="canvas_8h_source.html#l00089">89</a> of file <a class="el" href="canvas_8h_source.html">canvas.h</a>.</p>

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          <td>(</td>
          <td class="paramtype">void&#160;</td>
          <td class="paramname"></td><td>)</td>
          <td> const</td>
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<dl class="section return"><dt>Returns</dt><dd>the current zoom level for the canvas. </dd></dl>

<p>Definition at line <a class="el" href="canvas_8h_source.html#l00126">126</a> of file <a class="el" href="canvas_8h_source.html">canvas.h</a>.</p>

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          <td>(</td>
          <td class="paramtype">double&#160;</td>
          <td class="paramname"><em>x0</em>, </td>
        </tr>
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          <td class="paramkey"></td>
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          <td class="paramtype">double&#160;</td>
          <td class="paramname"><em>y0</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">double&#160;</td>
          <td class="paramname"><em>x1</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">double&#160;</td>
          <td class="paramname"><em>y1</em>&#160;</td>
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          <td>)</td>
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<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">x0</td><td>the x coordinate for the top left of the invalidated rectangle. </td></tr>
    <tr><td class="paramname">y0</td><td>the y coordinate for the top left of the scrolling rectangle. </td></tr>
    <tr><td class="paramname">x1</td><td>the x coordinate for the bottom right of the scrolling rectangle. </td></tr>
    <tr><td class="paramname">y1</td><td>the y coordinate for the bottom right of the scrolling rectangle. </td></tr>
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          <td>(</td>
          <td class="paramtype">cairo_t *&#160;</td>
          <td class="paramname"><em>cr</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">bool&#160;</td>
          <td class="paramname"><em>is_vector</em>&#160;</td>
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          <td>)</td>
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<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">cr</td><td>a cairo context. </td></tr>
    <tr><td class="paramname">is_vector</td><td>whether the cairo context is vectorial or raster.</td></tr>
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<p>Renders the current canvas to the cairo context. </p>

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          <td class="memname">void gccv::Canvas::SetBackgroundColor </td>
          <td>(</td>
          <td class="paramtype">GOColor&#160;</td>
          <td class="paramname"><em>color</em></td><td>)</td>
          <td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramname">color</td><td>a GOColor.</td></tr>
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<p>Sets the background color for the canvas widget </p>

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          <td>(</td>
          <td class="paramtype">double&#160;</td>
          <td class="paramname"><em>gap</em></td><td>)</td>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">gap</td><td>a distance at which an item might be from an event location to be selected for the event.</td></tr>
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<p>Sets the maximum distance at which an item might be from an event location to be selected for the event. When an even as a mouse button click occurs, and if it occurs on an item, the appropriate method of the item client will be called; else if it occurs on the background, the nearest item will be used if its distance from the event location is less than <em>gap</em>. If no item can be used, the event will have no associated <a class="el" href="classgccv_1_1ItemClient.html" title="the base class for objects associated with a canvas item.">gccv::ItemClient</a> instance. </p>

<p>Definition at line <a class="el" href="canvas_8h_source.html#l00148">148</a> of file <a class="el" href="canvas_8h_source.html">canvas.h</a>.</p>

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          <td class="memname">void gccv::Canvas::SetZoom </td>
          <td>(</td>
          <td class="paramtype">double&#160;</td>
          <td class="paramname"><em>zoom</em></td><td>)</td>
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<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">zoom</td><td>the new zoom level.</td></tr>
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<p>Sets the zoom level for the canvas. </p>

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<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="canvas_8h_source.html">canvas.h</a></li>
</ul>
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