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Documentation/Source/eric6.E5Graphics.E5GraphicsView.html@a3809f75ca07

Documentation/Source/eric6.E5Graphics.E5GraphicsView.html

Tue, 24 Oct 2017 19:09:09 +0200

author
Detlev Offenbach <detlev@die-offenbachs.de>
date
Tue, 24 Oct 2017 19:09:09 +0200
changeset 5928
a3809f75ca07
parent 5606
da305d172769
permissions
-rw-r--r--

Changed the logic of the two web browsers in order to put new downloads at the top of the list of downloads and add the download date and time to the shown info.

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<h1>eric6.E5Graphics.E5GraphicsView</h1>
<p>
Module implementing a canvas view class.
</p>
<h3>Global Attributes</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Classes</h3>
<table>
<tr>
<td><a href="#E5GraphicsView">E5GraphicsView</a></td>
<td>Class implementing a graphics view.</td>
</tr>
</table>
<h3>Functions</h3>
<table>
<tr><td>None</td></tr>
</table>
<hr /><hr />
<a NAME="E5GraphicsView" ID="E5GraphicsView"></a>
<h2>E5GraphicsView</h2>
<p>
    Class implementing a graphics view.
</p><h3>Signals</h3>
<dl>
<dt>zoomValueChanged(int)</dt>
<dd>
emitted to signal a change of the zoom value
</dd>
</dl>
<h3>Derived from</h3>
QGraphicsView
<h3>Class Attributes</h3>
<table>
<tr><td>ZoomLevelDefault</td></tr><tr><td>ZoomLevels</td></tr>
</table>
<h3>Class Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<h3>Methods</h3>
<table>
<tr>
<td><a href="#E5GraphicsView.__init__">E5GraphicsView</a></td>
<td>Constructor</td>
</tr><tr>
<td><a href="#E5GraphicsView.__getDiagram">__getDiagram</a></td>
<td>Private method to retrieve the diagram from the scene fitting it in the minimum rectangle.</td>
</tr><tr>
<td><a href="#E5GraphicsView.__levelForZoom">__levelForZoom</a></td>
<td>Private method determining the zoom level index given a zoom factor.</td>
</tr><tr>
<td><a href="#E5GraphicsView._getDiagramRect">_getDiagramRect</a></td>
<td>Protected method to calculate the minimum rectangle fitting the diagram.</td>
</tr><tr>
<td><a href="#E5GraphicsView._getDiagramSize">_getDiagramSize</a></td>
<td>Protected method to calculate the minimum size fitting the diagram.</td>
</tr><tr>
<td><a href="#E5GraphicsView.autoAdjustSceneSize">autoAdjustSceneSize</a></td>
<td>Public method to adjust the scene size to the diagram size.</td>
</tr><tr>
<td><a href="#E5GraphicsView.filteredItems">filteredItems</a></td>
<td>Public method to filter a list of items.</td>
</tr><tr>
<td><a href="#E5GraphicsView.printDiagram">printDiagram</a></td>
<td>Public method to print the diagram.</td>
</tr><tr>
<td><a href="#E5GraphicsView.resizeScene">resizeScene</a></td>
<td>Public method to resize the scene.</td>
</tr><tr>
<td><a href="#E5GraphicsView.saveImage">saveImage</a></td>
<td>Public method to save the scene to a file.</td>
</tr><tr>
<td><a href="#E5GraphicsView.setSceneSize">setSceneSize</a></td>
<td>Public method to set the scene size.</td>
</tr><tr>
<td><a href="#E5GraphicsView.setZoom">setZoom</a></td>
<td>Public method to set the zoom value in percent.</td>
</tr><tr>
<td><a href="#E5GraphicsView.zoom">zoom</a></td>
<td>Public method to get the current zoom factor in percent.</td>
</tr><tr>
<td><a href="#E5GraphicsView.zoomIn">zoomIn</a></td>
<td>Public method to zoom in.</td>
</tr><tr>
<td><a href="#E5GraphicsView.zoomOut">zoomOut</a></td>
<td>Public method to zoom out.</td>
</tr><tr>
<td><a href="#E5GraphicsView.zoomReset">zoomReset</a></td>
<td>Public method to handle the reset the zoom value.</td>
</tr>
</table>
<h3>Static Methods</h3>
<table>
<tr><td>None</td></tr>
</table>
<a NAME="E5GraphicsView.__init__" ID="E5GraphicsView.__init__"></a>
<h4>E5GraphicsView (Constructor)</h4>
<b>E5GraphicsView</b>(<i>scene, parent=None</i>)
<p>
        Constructor
</p><dl>
<dt><i>scene</i></dt>
<dd>
reference to the scene object (QGraphicsScene)
</dd><dt><i>parent</i></dt>
<dd>
parent widget (QWidget)
</dd>
</dl><a NAME="E5GraphicsView.__getDiagram" ID="E5GraphicsView.__getDiagram"></a>
<h4>E5GraphicsView.__getDiagram</h4>
<b>__getDiagram</b>(<i>rect, imageFormat="PNG", filename=None</i>)
<p>
        Private method to retrieve the diagram from the scene fitting it
        in the minimum rectangle.
</p><dl>
<dt><i>rect</i></dt>
<dd>
minimum rectangle fitting the diagram (QRectF)
</dd><dt><i>imageFormat</i></dt>
<dd>
format for the image file (string)
</dd><dt><i>filename</i></dt>
<dd>
name of the file for non pixmaps (string)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
diagram pixmap to receive the diagram (QPixmap)
</dd>
</dl><a NAME="E5GraphicsView.__levelForZoom" ID="E5GraphicsView.__levelForZoom"></a>
<h4>E5GraphicsView.__levelForZoom</h4>
<b>__levelForZoom</b>(<i>zoom</i>)
<p>
        Private method determining the zoom level index given a zoom factor.
</p><dl>
<dt><i>zoom</i></dt>
<dd>
zoom factor (integer)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
index of zoom factor (integer)
</dd>
</dl><a NAME="E5GraphicsView._getDiagramRect" ID="E5GraphicsView._getDiagramRect"></a>
<h4>E5GraphicsView._getDiagramRect</h4>
<b>_getDiagramRect</b>(<i>border=0</i>)
<p>
        Protected method to calculate the minimum rectangle fitting the
        diagram.
</p><dl>
<dt><i>border</i></dt>
<dd>
border width to include in the calculation (integer)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
the minimum rectangle (QRectF)
</dd>
</dl><a NAME="E5GraphicsView._getDiagramSize" ID="E5GraphicsView._getDiagramSize"></a>
<h4>E5GraphicsView._getDiagramSize</h4>
<b>_getDiagramSize</b>(<i>border=0</i>)
<p>
        Protected method to calculate the minimum size fitting the diagram.
</p><dl>
<dt><i>border</i></dt>
<dd>
border width to include in the calculation (integer)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
the minimum size (QSizeF)
</dd>
</dl><a NAME="E5GraphicsView.autoAdjustSceneSize" ID="E5GraphicsView.autoAdjustSceneSize"></a>
<h4>E5GraphicsView.autoAdjustSceneSize</h4>
<b>autoAdjustSceneSize</b>(<i>limit=False</i>)
<p>
        Public method to adjust the scene size to the diagram size.
</p><dl>
<dt><i>limit</i></dt>
<dd>
flag indicating to limit the scene to the
            initial size (boolean)
</dd>
</dl><a NAME="E5GraphicsView.filteredItems" ID="E5GraphicsView.filteredItems"></a>
<h4>E5GraphicsView.filteredItems</h4>
<b>filteredItems</b>(<i>items</i>)
<p>
        Public method to filter a list of items.
</p><dl>
<dt><i>items</i></dt>
<dd>
list of items as returned by the scene object
            (QGraphicsItem)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
list of interesting collision items (QGraphicsItem)
</dd>
</dl><a NAME="E5GraphicsView.printDiagram" ID="E5GraphicsView.printDiagram"></a>
<h4>E5GraphicsView.printDiagram</h4>
<b>printDiagram</b>(<i>printer, diagramName=""</i>)
<p>
        Public method to print the diagram.
</p><dl>
<dt><i>printer</i></dt>
<dd>
reference to a ready configured printer object
            (QPrinter)
</dd><dt><i>diagramName</i></dt>
<dd>
name of the diagram (string)
</dd>
</dl><a NAME="E5GraphicsView.resizeScene" ID="E5GraphicsView.resizeScene"></a>
<h4>E5GraphicsView.resizeScene</h4>
<b>resizeScene</b>(<i>amount, isWidth=True</i>)
<p>
        Public method to resize the scene.
</p><dl>
<dt><i>amount</i></dt>
<dd>
size increment (integer)
</dd><dt><i>isWidth</i></dt>
<dd>
flag indicating width is to be resized (boolean)
</dd>
</dl><a NAME="E5GraphicsView.saveImage" ID="E5GraphicsView.saveImage"></a>
<h4>E5GraphicsView.saveImage</h4>
<b>saveImage</b>(<i>filename, imageFormat="PNG"</i>)
<p>
        Public method to save the scene to a file.
</p><dl>
<dt><i>filename</i></dt>
<dd>
name of the file to write the image to (string)
</dd><dt><i>imageFormat</i></dt>
<dd>
format for the image file (string)
</dd>
</dl><dl>
<dt>Returns:</dt>
<dd>
flag indicating success (boolean)
</dd>
</dl><a NAME="E5GraphicsView.setSceneSize" ID="E5GraphicsView.setSceneSize"></a>
<h4>E5GraphicsView.setSceneSize</h4>
<b>setSceneSize</b>(<i>width, height</i>)
<p>
        Public method to set the scene size.
</p><dl>
<dt><i>width</i></dt>
<dd>
width for the scene (real)
</dd><dt><i>height</i></dt>
<dd>
height for the scene (real)
</dd>
</dl><a NAME="E5GraphicsView.setZoom" ID="E5GraphicsView.setZoom"></a>
<h4>E5GraphicsView.setZoom</h4>
<b>setZoom</b>(<i>value</i>)
<p>
        Public method to set the zoom value in percent.
</p><dl>
<dt><i>value</i></dt>
<dd>
zoom value in percent (integer)
</dd>
</dl><a NAME="E5GraphicsView.zoom" ID="E5GraphicsView.zoom"></a>
<h4>E5GraphicsView.zoom</h4>
<b>zoom</b>(<i></i>)
<p>
        Public method to get the current zoom factor in percent.
</p><dl>
<dt>Returns:</dt>
<dd>
current zoom factor in percent (integer)
</dd>
</dl><a NAME="E5GraphicsView.zoomIn" ID="E5GraphicsView.zoomIn"></a>
<h4>E5GraphicsView.zoomIn</h4>
<b>zoomIn</b>(<i></i>)
<p>
        Public method to zoom in.
</p><a NAME="E5GraphicsView.zoomOut" ID="E5GraphicsView.zoomOut"></a>
<h4>E5GraphicsView.zoomOut</h4>
<b>zoomOut</b>(<i></i>)
<p>
        Public method to zoom out.
</p><a NAME="E5GraphicsView.zoomReset" ID="E5GraphicsView.zoomReset"></a>
<h4>E5GraphicsView.zoomReset</h4>
<b>zoomReset</b>(<i></i>)
<p>
        Public method to handle the reset the zoom value.
</p>
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