src/eric7/Documentation/Source/eric7.HelpViewer.HelpViewerImpl.html

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<h1>eric7.HelpViewer.HelpViewerImpl</h1>

<p>
Module implementing the help viewer base class.
</p>
<h3>Global Attributes</h3>

<table>
<tr><td>None</td></tr>
</table>
<h3>Classes</h3>

<table>

<tr>
<td><a href="#HelpViewerImpl">HelpViewerImpl</a></td>
<td>Class implementing the help viewer base class.</td>
</tr>
</table>
<h3>Functions</h3>

<table>
<tr><td>None</td></tr>
</table>
<hr />
<hr />
<a NAME="HelpViewerImpl" ID="HelpViewerImpl"></a>
<h2>HelpViewerImpl</h2>

<p>
    Class implementing the help viewer base class.
</p>
<p>
    This is the base class of help viewer implementations and defines the
    interface. Als subclasses must implement the these methods.
</p>
<h3>Signals</h3>
<dl>

<dt>loadFinished(ok)</dt>
<dd>
emitted to indicate the completion of a page load
</dd>
<dt>titleChanged()</dt>
<dd>
emitted to indicate a change of the page title
</dd>
<dt>zoomChanged()</dt>
<dd>
emitted to indicate a change of the zoom level
</dd>
</dl>
<h3>Derived from</h3>
None
<h3>Class Attributes</h3>

<table>
<tr><td>None</td></tr>
</table>
<h3>Class Methods</h3>

<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>

<table>

<tr>
<td><a href="#HelpViewerImpl.__init__">HelpViewerImpl</a></td>
<td>Constructor</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.gotoHistory">gotoHistory</a></td>
<td>Public method to step through the history.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.isBackwardAvailable">isBackwardAvailable</a></td>
<td>Public method to check, if stepping backward through the history is available.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.isEmptyPage">isEmptyPage</a></td>
<td>Public method to check, if the current page is the empty page.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.isForwardAvailable">isForwardAvailable</a></td>
<td>Public method to check, if stepping forward through the history is available.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.isScaleDownAvailable">isScaleDownAvailable</a></td>
<td>Public method to check, if the min.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.isScaleUpAvailable">isScaleUpAvailable</a></td>
<td>Public method to check, if the max.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.link">link</a></td>
<td>Public method to get the URL of the shown document.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.pageTitle">pageTitle</a></td>
<td>Public method get the page title.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.resetScale">resetScale</a></td>
<td>Public method to reset the zoom level.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.scale">scale</a></td>
<td>Public method to get the zoom level.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.scaleDown">scaleDown</a></td>
<td>Public method to zoom out.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.scaleUp">scaleUp</a></td>
<td>Public method to zoom in.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.setLink">setLink</a></td>
<td>Public method to set the URL of the document to be shown.</td>
</tr>
<tr>
<td><a href="#HelpViewerImpl.setScale">setScale</a></td>
<td>Public method to set the zoom level.</td>
</tr>
</table>
<h3>Static Methods</h3>

<table>
<tr><td>None</td></tr>
</table>

<a NAME="HelpViewerImpl.__init__" ID="HelpViewerImpl.__init__"></a>
<h4>HelpViewerImpl (Constructor)</h4>
<b>HelpViewerImpl</b>(<i>engine</i>)

<p>
        Constructor
</p>
<dl>

<dt><i>engine</i> (QHelpEngine)</dt>
<dd>
reference to the help engine
</dd>
</dl>
<a NAME="HelpViewerImpl.gotoHistory" ID="HelpViewerImpl.gotoHistory"></a>
<h4>HelpViewerImpl.gotoHistory</h4>
<b>gotoHistory</b>(<i>index</i>)

<p>
        Public method to step through the history.
</p>
<dl>

<dt><i>index</i> (int)</dt>
<dd>
history index (<0 backward, >0 forward)
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.isBackwardAvailable" ID="HelpViewerImpl.isBackwardAvailable"></a>
<h4>HelpViewerImpl.isBackwardAvailable</h4>
<b>isBackwardAvailable</b>(<i></i>)

<p>
        Public method to check, if stepping backward through the history is
        available.
</p>
<dl>
<dt>Return:</dt>
<dd>
flag indicating backward stepping is available
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
bool
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.isEmptyPage" ID="HelpViewerImpl.isEmptyPage"></a>
<h4>HelpViewerImpl.isEmptyPage</h4>
<b>isEmptyPage</b>(<i></i>)

<p>
        Public method to check, if the current page is the empty page.
</p>
<dl>
<dt>Return:</dt>
<dd>
flag indicating an empty page is loaded
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
bool
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.isForwardAvailable" ID="HelpViewerImpl.isForwardAvailable"></a>
<h4>HelpViewerImpl.isForwardAvailable</h4>
<b>isForwardAvailable</b>(<i></i>)

<p>
        Public method to check, if stepping forward through the history is
        available.
</p>
<dl>
<dt>Return:</dt>
<dd>
flag indicating forward stepping is available
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
bool
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.isScaleDownAvailable" ID="HelpViewerImpl.isScaleDownAvailable"></a>
<h4>HelpViewerImpl.isScaleDownAvailable</h4>
<b>isScaleDownAvailable</b>(<i></i>)

<p>
        Public method to check, if the min. zoom level is reached.
</p>
<dl>
<dt>Return:</dt>
<dd>
flag indicating scale down is available
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
bool
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.isScaleUpAvailable" ID="HelpViewerImpl.isScaleUpAvailable"></a>
<h4>HelpViewerImpl.isScaleUpAvailable</h4>
<b>isScaleUpAvailable</b>(<i></i>)

<p>
        Public method to check, if the max. zoom level is reached.
</p>
<dl>
<dt>Return:</dt>
<dd>
flag indicating scale up is available
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
bool
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.link" ID="HelpViewerImpl.link"></a>
<h4>HelpViewerImpl.link</h4>
<b>link</b>(<i></i>)

<p>
        Public method to get the URL of the shown document.
</p>
<dl>
<dt>Return:</dt>
<dd>
URL of the document
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
QUrl
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.pageTitle" ID="HelpViewerImpl.pageTitle"></a>
<h4>HelpViewerImpl.pageTitle</h4>
<b>pageTitle</b>(<i></i>)

<p>
        Public method get the page title.
</p>
<dl>
<dt>Return:</dt>
<dd>
page title
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
str
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.resetScale" ID="HelpViewerImpl.resetScale"></a>
<h4>HelpViewerImpl.resetScale</h4>
<b>resetScale</b>(<i></i>)

<p>
        Public method to reset the zoom level.
</p>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.scale" ID="HelpViewerImpl.scale"></a>
<h4>HelpViewerImpl.scale</h4>
<b>scale</b>(<i></i>)

<p>
        Public method to get the zoom level.
</p>
<dl>
<dt>Return:</dt>
<dd>
current zoom level
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
int
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.scaleDown" ID="HelpViewerImpl.scaleDown"></a>
<h4>HelpViewerImpl.scaleDown</h4>
<b>scaleDown</b>(<i></i>)

<p>
        Public method to zoom out.
</p>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.scaleUp" ID="HelpViewerImpl.scaleUp"></a>
<h4>HelpViewerImpl.scaleUp</h4>
<b>scaleUp</b>(<i></i>)

<p>
        Public method to zoom in.
</p>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.setLink" ID="HelpViewerImpl.setLink"></a>
<h4>HelpViewerImpl.setLink</h4>
<b>setLink</b>(<i>url</i>)

<p>
        Public method to set the URL of the document to be shown.
</p>
<dl>

<dt><i>url</i> (QUrl)</dt>
<dd>
URL of the document
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
<a NAME="HelpViewerImpl.setScale" ID="HelpViewerImpl.setScale"></a>
<h4>HelpViewerImpl.setScale</h4>
<b>setScale</b>(<i>scale</i>)

<p>
        Public method to set the zoom level.
</p>
<dl>

<dt><i>scale</i> (int)</dt>
<dd>
zoom level to set
</dd>
</dl>
<dl>

<dt>Raises <b>RuntimeError</b>:</dt>
<dd>
raised when not implemented
</dd>
</dl>
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