eric6/Documentation/Source/eric6.UI.PythonDisViewer.html

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<h1>eric6.UI.PythonDisViewer</h1>

<p>
Module implementing a widget to visualize the Python Disassembly for some
Python sources.
</p>
<h3>Global Attributes</h3>

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

<table>

<tr>
<td><a href="#PythonDisViewer">PythonDisViewer</a></td>
<td>Class implementing a widget to visualize the Python Disassembly for some Python sources.</td>
</tr>
</table>
<h3>Functions</h3>

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

<p>
    Class implementing a widget to visualize the Python Disassembly for some
    Python sources.
</p>
<h3>Derived from</h3>
QWidget
<h3>Class Attributes</h3>

<table>
<tr><td>EndLineRole</td></tr><tr><td>StartLineRole</td></tr>
</table>
<h3>Class Methods</h3>

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

<table>

<tr>
<td><a href="#PythonDisViewer.__init__">PythonDisViewer</a></td>
<td>Constructor</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__clearSelection">__clearSelection</a></td>
<td>Private method to clear all selected items.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__collapseAll">__collapseAll</a></td>
<td>Private slot to collapse all items.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__contextMenuRequested">__contextMenuRequested</a></td>
<td>Private slot to show the context menu.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__createErrorItem">__createErrorItem</a></td>
<td>Private method to create a top level error item.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__createInstructionItem">__createInstructionItem</a></td>
<td>Private method to create an item for the given instruction.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__createTitleItem">__createTitleItem</a></td>
<td>Private method to create a title item.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__disItemClicked">__disItemClicked</a></td>
<td>Private slot handling a user click on a Disassembly node item.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__disViewerStateChanged">__disViewerStateChanged</a></td>
<td>Private slot to toggle the display of the Disassembly viewer.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__disassembleObject">__disassembleObject</a></td>
<td>Private method to disassemble the given code object recursively.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__editorChanged">__editorChanged</a></td>
<td>Private slot to handle a change of the current editor.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__editorLineChanged">__editorLineChanged</a></td>
<td>Private slot to handle a mouse button double click in the editor.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__editorSaved">__editorSaved</a></td>
<td>Private slot to reload the Disassembly after the connected editor was saved.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__expandAll">__expandAll</a></td>
<td>Private slot to expand all items.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__grabFocus">__grabFocus</a></td>
<td>Private method to grab the input focus.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__lastEditorClosed">__lastEditorClosed</a></td>
<td>Private slot to handle the last editor closed signal of the view manager.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__loadDIS">__loadDIS</a></td>
<td>Private method to generate the Disassembly from the source of the current editor and visualize it.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__resizeColumns">__resizeColumns</a></td>
<td>Private method to resize the columns to suitable values.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__selectChildren">__selectChildren</a></td>
<td>Private method to select children of the given item covering the given line number.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__selectItemForEditorLine">__selectItemForEditorLine</a></td>
<td>Private slot to select the items corresponding with the cursor line of the current editor.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__tryCompile">__tryCompile</a></td>
<td>Private method to attempt to compile the given source, first as an expression and then as a statement if the first approach fails.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.__updateItemEndLine">__updateItemEndLine</a></td>
<td>Private method to update an items end line based on its children.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.hide">hide</a></td>
<td>Public slot to hide the DIS viewer.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.preferencesChanged">preferencesChanged</a></td>
<td>Public slot handling changes of the Disassembly viewer settings.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.resizeEvent">resizeEvent</a></td>
<td>Protected method to handle resize events.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.show">show</a></td>
<td>Public slot to show the DIS viewer.</td>
</tr>
<tr>
<td><a href="#PythonDisViewer.shutdown">shutdown</a></td>
<td>Public method to perform shutdown actions.</td>
</tr>
</table>
<h3>Static Methods</h3>

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

<a NAME="PythonDisViewer.__init__" ID="PythonDisViewer.__init__"></a>
<h4>PythonDisViewer (Constructor)</h4>
<b>PythonDisViewer</b>(<i>viewmanager, parent=None</i>)

<p>
        Constructor
</p>
<dl>

<dt><i>viewmanager</i> (ViewManager)</dt>
<dd>
reference to the viewmanager object
</dd>
<dt><i>parent</i> (QWidget)</dt>
<dd>
reference to the parent widget
</dd>
</dl>
<a NAME="PythonDisViewer.__clearSelection" ID="PythonDisViewer.__clearSelection"></a>
<h4>PythonDisViewer.__clearSelection</h4>
<b>__clearSelection</b>(<i></i>)

<p>
        Private method to clear all selected items.
</p>
<a NAME="PythonDisViewer.__collapseAll" ID="PythonDisViewer.__collapseAll"></a>
<h4>PythonDisViewer.__collapseAll</h4>
<b>__collapseAll</b>(<i></i>)

<p>
        Private slot to collapse all items.
</p>
<a NAME="PythonDisViewer.__contextMenuRequested" ID="PythonDisViewer.__contextMenuRequested"></a>
<h4>PythonDisViewer.__contextMenuRequested</h4>
<b>__contextMenuRequested</b>(<i>coord</i>)

<p>
        Private slot to show the context menu.
</p>
<dl>

<dt><i>coord</i> (QPoint)</dt>
<dd>
position of the mouse pointer
</dd>
</dl>
<a NAME="PythonDisViewer.__createErrorItem" ID="PythonDisViewer.__createErrorItem"></a>
<h4>PythonDisViewer.__createErrorItem</h4>
<b>__createErrorItem</b>(<i>error</i>)

<p>
        Private method to create a top level error item.
</p>
<dl>

<dt><i>error</i> (str)</dt>
<dd>
error message
</dd>
</dl>
<dl>
<dt>Returns:</dt>
<dd>
generated item
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
QTreeWidgetItem
</dd>
</dl>
<a NAME="PythonDisViewer.__createInstructionItem" ID="PythonDisViewer.__createInstructionItem"></a>
<h4>PythonDisViewer.__createInstructionItem</h4>
<b>__createInstructionItem</b>(<i>instr, parent, lasti=-1</i>)

<p>
        Private method to create an item for the given instruction.
</p>
<dl>

<dt><i>instr</i> (dis.Instruction)</dt>
<dd>
instruction the item should be based on
</dd>
<dt><i>parent</i> (QTreeWidgetItem)</dt>
<dd>
reference to the parent item
</dd>
<dt><i>lasti</i> (int)</dt>
<dd>
index of the instruction of a traceback
</dd>
</dl>
<dl>
<dt>Returns:</dt>
<dd>
generated item
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
QTreeWidgetItem
</dd>
</dl>
<a NAME="PythonDisViewer.__createTitleItem" ID="PythonDisViewer.__createTitleItem"></a>
<h4>PythonDisViewer.__createTitleItem</h4>
<b>__createTitleItem</b>(<i>title, line, parentItem</i>)

<p>
        Private method to create a title item.
</p>
<dl>

<dt><i>title</i> (str)</dt>
<dd>
titel string for the item
</dd>
<dt><i>line</i> (int)</dt>
<dd>
start line of the titled disassembly
</dd>
<dt><i>parentItem</i> (QTreeWidget or QTreeWidgetItem)</dt>
<dd>
reference to the parent item
</dd>
</dl>
<dl>
<dt>Returns:</dt>
<dd>
generated item
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
QTreeWidgetItem
</dd>
</dl>
<a NAME="PythonDisViewer.__disItemClicked" ID="PythonDisViewer.__disItemClicked"></a>
<h4>PythonDisViewer.__disItemClicked</h4>
<b>__disItemClicked</b>(<i>itm, column</i>)

<p>
        Private slot handling a user click on a Disassembly node item.
</p>
<dl>

<dt><i>itm</i> (QTreeWidgetItem)</dt>
<dd>
reference to the clicked item
</dd>
<dt><i>column</i> (int)</dt>
<dd>
column number of the click
</dd>
</dl>
<a NAME="PythonDisViewer.__disViewerStateChanged" ID="PythonDisViewer.__disViewerStateChanged"></a>
<h4>PythonDisViewer.__disViewerStateChanged</h4>
<b>__disViewerStateChanged</b>(<i>on</i>)

<p>
        Private slot to toggle the display of the Disassembly viewer.
</p>
<dl>

<dt><i>on</i> (bool)</dt>
<dd>
flag indicating to show the Disassembly
</dd>
</dl>
<a NAME="PythonDisViewer.__disassembleObject" ID="PythonDisViewer.__disassembleObject"></a>
<h4>PythonDisViewer.__disassembleObject</h4>
<b>__disassembleObject</b>(<i>co, parentItem, parentName="", lasti=-1</i>)

<p>
        Private method to disassemble the given code object recursively.
</p>
<dl>

<dt><i>co</i> (code object)</dt>
<dd>
code object to be disassembled
</dd>
<dt><i>parentItem</i> (QTreeWidget or QTreeWidgetItem)</dt>
<dd>
reference to the parent item
</dd>
<dt><i>parentName</i> (str)</dt>
<dd>
name of the parent code object
</dd>
<dt><i>lasti</i> (int)</dt>
<dd>
index of the instruction of a traceback
</dd>
</dl>
<a NAME="PythonDisViewer.__editorChanged" ID="PythonDisViewer.__editorChanged"></a>
<h4>PythonDisViewer.__editorChanged</h4>
<b>__editorChanged</b>(<i>editor</i>)

<p>
        Private slot to handle a change of the current editor.
</p>
<dl>

<dt><i>editor</i> (Editor)</dt>
<dd>
reference to the current editor
</dd>
</dl>
<a NAME="PythonDisViewer.__editorLineChanged" ID="PythonDisViewer.__editorLineChanged"></a>
<h4>PythonDisViewer.__editorLineChanged</h4>
<b>__editorLineChanged</b>(<i>editor, lineno</i>)

<p>
        Private slot to handle a mouse button double click in the editor.
</p>
<dl>

<dt><i>editor</i> (Editor)</dt>
<dd>
reference to the editor, that emitted the signal
</dd>
<dt><i>lineno</i> (int)</dt>
<dd>
line number of the editor's cursor (zero based)
</dd>
</dl>
<a NAME="PythonDisViewer.__editorSaved" ID="PythonDisViewer.__editorSaved"></a>
<h4>PythonDisViewer.__editorSaved</h4>
<b>__editorSaved</b>(<i>editor</i>)

<p>
        Private slot to reload the Disassembly after the connected editor was
        saved.
</p>
<dl>

<dt><i>editor</i> (Editor)</dt>
<dd>
reference to the editor that performed a save action
</dd>
</dl>
<a NAME="PythonDisViewer.__expandAll" ID="PythonDisViewer.__expandAll"></a>
<h4>PythonDisViewer.__expandAll</h4>
<b>__expandAll</b>(<i></i>)

<p>
        Private slot to expand all items.
</p>
<a NAME="PythonDisViewer.__grabFocus" ID="PythonDisViewer.__grabFocus"></a>
<h4>PythonDisViewer.__grabFocus</h4>
<b>__grabFocus</b>(<i></i>)

<p>
        Private method to grab the input focus.
</p>
<a NAME="PythonDisViewer.__lastEditorClosed" ID="PythonDisViewer.__lastEditorClosed"></a>
<h4>PythonDisViewer.__lastEditorClosed</h4>
<b>__lastEditorClosed</b>(<i></i>)

<p>
        Private slot to handle the last editor closed signal of the view
        manager.
</p>
<a NAME="PythonDisViewer.__loadDIS" ID="PythonDisViewer.__loadDIS"></a>
<h4>PythonDisViewer.__loadDIS</h4>
<b>__loadDIS</b>(<i></i>)

<p>
        Private method to generate the Disassembly from the source of the
        current editor and visualize it.
</p>
<a NAME="PythonDisViewer.__resizeColumns" ID="PythonDisViewer.__resizeColumns"></a>
<h4>PythonDisViewer.__resizeColumns</h4>
<b>__resizeColumns</b>(<i></i>)

<p>
        Private method to resize the columns to suitable values.
</p>
<a NAME="PythonDisViewer.__selectChildren" ID="PythonDisViewer.__selectChildren"></a>
<h4>PythonDisViewer.__selectChildren</h4>
<b>__selectChildren</b>(<i>itm, lineno</i>)

<p>
        Private method to select children of the given item covering the given
        line number.
</p>
<dl>

<dt><i>itm</i> (QTreeWidgetItem)</dt>
<dd>
reference to the item
</dd>
<dt><i>lineno</i> (int)</dt>
<dd>
line number to base the selection on
</dd>
</dl>
<a NAME="PythonDisViewer.__selectItemForEditorLine" ID="PythonDisViewer.__selectItemForEditorLine"></a>
<h4>PythonDisViewer.__selectItemForEditorLine</h4>
<b>__selectItemForEditorLine</b>(<i></i>)

<p>
        Private slot to select the items corresponding with the cursor line
        of the current editor.
</p>
<a NAME="PythonDisViewer.__tryCompile" ID="PythonDisViewer.__tryCompile"></a>
<h4>PythonDisViewer.__tryCompile</h4>
<b>__tryCompile</b>(<i>source, name</i>)

<p>
        Private method to attempt to compile the given source, first as an
        expression and then as a statement if the first approach fails.
</p>
<dl>

<dt><i>source</i> (str)</dt>
<dd>
source code string to be compiled
</dd>
<dt><i>name</i> (str)</dt>
<dd>
name of the file containing the source
</dd>
</dl>
<dl>
<dt>Returns:</dt>
<dd>
compiled code
</dd>
</dl>
<dl>
<dt>Return Type:</dt>
<dd>
code object
</dd>
</dl>
<a NAME="PythonDisViewer.__updateItemEndLine" ID="PythonDisViewer.__updateItemEndLine"></a>
<h4>PythonDisViewer.__updateItemEndLine</h4>
<b>__updateItemEndLine</b>(<i>itm</i>)

<p>
        Private method to update an items end line based on its children.
</p>
<dl>

<dt><i>itm</i> (QTreeWidgetItem)</dt>
<dd>
reference to the item to be updated
</dd>
</dl>
<a NAME="PythonDisViewer.hide" ID="PythonDisViewer.hide"></a>
<h4>PythonDisViewer.hide</h4>
<b>hide</b>(<i></i>)

<p>
        Public slot to hide the DIS viewer.
</p>
<a NAME="PythonDisViewer.preferencesChanged" ID="PythonDisViewer.preferencesChanged"></a>
<h4>PythonDisViewer.preferencesChanged</h4>
<b>preferencesChanged</b>(<i></i>)

<p>
        Public slot handling changes of the Disassembly viewer settings.
</p>
<a NAME="PythonDisViewer.resizeEvent" ID="PythonDisViewer.resizeEvent"></a>
<h4>PythonDisViewer.resizeEvent</h4>
<b>resizeEvent</b>(<i>evt</i>)

<p>
        Protected method to handle resize events.
</p>
<dl>

<dt><i>evt</i> (QResizeEvent)</dt>
<dd>
resize event
</dd>
</dl>
<a NAME="PythonDisViewer.show" ID="PythonDisViewer.show"></a>
<h4>PythonDisViewer.show</h4>
<b>show</b>(<i></i>)

<p>
        Public slot to show the DIS viewer.
</p>
<a NAME="PythonDisViewer.shutdown" ID="PythonDisViewer.shutdown"></a>
<h4>PythonDisViewer.shutdown</h4>
<b>shutdown</b>(<i></i>)

<p>
        Public method to perform shutdown actions.
</p>
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