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<table border="0" cellspacing="0" cellpadding="3" width="100%"><tr><td> <div align="center" id="bldcontent"> <a href="../default.htm"><img src="../images/opendocs.png" width="63" height="76" border="0"></a> <br> <div class="symbol">Your OpenSource Publisher™</div> </div> </td></tr></table> <div align="center" class="author"> <a href="../products.lxp">Products</a> | <a href="../wheretobuy.lxp">Where to buy</a> | <a href="../bookstore.lxp">Retailers</a> | <a href="../faq.lxp">FAQ</a> | <a href="../writeforus.lxp">Write for Us.</a> | <a href="#contact">Contact Us.</a> </div> <table border="0" cellspacing="3" cellpadding="0" width="100%"><tr><td width="100%"> <div class="content"> <table border="0" cellspacing="2" cellpadding="0" width="100%"><tr><td width="100%"> <div align="center"><H4 CLASS="AUTHOR"><A NAME="AEN5">Boudewijn Rempt</A><br><a href="../../https@secure.linuxports.com/opendocs/default.htm"><img src=odpyqt125.png></a><br>ISBN: 0-97003300-4-4<br><a href="../../https@secure.linuxports.com/opendocs/default.htm">Available from bookstores everywhere or you can order it here.</a><p>You can download the source files for the book <a href="pyqtsrc.tgz">(code / eps) here.</a><hr></div> <HTML><HEAD><TITLE>View</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.72"><LINKREL="HOME"TITLE="GUI Programming with Python: QT Edition"HREF="book1.htm"><LINKREL="UP"TITLE="A More Complex Framework: Multiple Documents, Multiple Views"HREF="c5288.htm"><LINKREL="PREVIOUS"TITLE="Document"HREF="x5451.htm"><LINKREL="NEXT"TITLE="The actual application"HREF="x5469.htm"></HEAD><BODYCLASS="SECT1"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLESUMMARY="Header navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">GUI Programming with Python: QT Edition</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><A accesskey="P" href="index.lxp@lxpwrap=x5451_252ehtm.htm">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 15. A More Complex Framework: Multiple Documents, Multiple Views</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><A accesskey="N" href="index.lxp@lxpwrap=x5469_252ehtm.htm">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1">View</A></H1><P>As with the document, the view is still a relatively uncomplicated object. It still knows which document it belongs to. I have added <TTCLASS="FUNCTION">close(self)</TT> to make it easier to follow the execution flow when closing a window. What is more important, however, is the <TTCLASS="FUNCTION">closeEvent()</TT> function — this is subclassed to completely override <TTCLASS="CLASSNAME">QWidget's</TT> default functionality. Close events are handled by the application itself, not by the view. The view doesn't know anything about the document manager, which ultimately handles the close event for all views.</P><DIVCLASS="EXAMPLE"></A><P><B>Example 15-4. The view class</B></P><PRECLASS="PROGRAMLISTING">"""mdiview.py — view componentcopyright: (C) 2001, Boudewijn Remptemail: boud@rempt.xs4all.nl"""from qt import *class MDIView(QWidget): """ The MDIView class can represent object of class MDIDoc on screen. slots: slotDocModified """ def __init__(self, parent, doc, *args): apply(QWidget.__init__,(self, parent) + args) self.doc = doc self.connect(self.doc, PYSIGNAL("sigDocModified"), self.slotDocModified) self.connect(self.doc, PYSIGNAL("sigDocTitleChanged"), self.setCaption) # Set initial values self.slotDocModified(self.doc.modified()) def slotDocModified(self, value): if value: self.setBackgroundColor(QColor("red")) else: self.setBackgroundColor(QColor("green")) def mouseDoubleClickEvent(self, ev): self.doc.slotModify() # direct call to the document def document(self): return self.doc def closeEvent(self, e): pass def close(self, destroy=0): return QWidget.close(self, destroy) </PRE></DIV></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLESUMMARY="Footer navigation table"WIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><A accesskey="P" href="index.lxp@lxpwrap=x5451_252ehtm.htm">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><A accesskey="H" href="index.lxp@lxpwrap=book1_252ehtm">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><A accesskey="N" href="index.lxp@lxpwrap=x5469_252ehtm.htm">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Document</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><A accesskey="U" href="index.lxp@lxpwrap=c5288_252ehtm.htm">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">The actual application</TD></TR></TABLE></DIV></BODY></HTML> </td> </tr> </table> </td> </tr> </table> ⌨️ 快捷键说明
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