--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RefactoringRope/HelpDialog.py	Sun Jan 23 19:55:56 2011 +0100
@@ -0,0 +1,98 @@
+# -*- coding: utf-8 -*-
+
+# Copyright (c) 2011 Detlev Offenbach <detlev@die-offenbachs.de>
+#
+
+"""
+Module implementing a dialog to show help about rope.
+"""
+
+from PyQt4.QtGui import QDialog, QDialogButtonBox, QTextDocument, QTextCursor
+
+from Ui_HelpDialog import Ui_HelpDialog
+from SearchDialog import SearchDialog
+
+import Globals
+
+class HelpDialog(QDialog, Ui_HelpDialog):
+    """
+    Class implementing a dialog to show help about rope.
+    """
+    def __init__(self, title, helpfile, parent = None):
+        """
+        Constructor
+        
+        @param title window title (string)
+        @param helpfile filename of the helpfile (string)
+        @param parent reference to the parent widget (QWidget)
+        """
+        QDialog.__init__(self, parent)
+        self.setupUi(self)
+        
+        self.searchButton = self.buttonBox.addButton(
+            self.trUtf8("Search..."), QDialogButtonBox.ActionRole)
+        self.__searchDlg = None
+        
+        if Globals.isWindowsPlatform():
+            self.helpEdit.setFontFamily("Lucida Console")
+        else:
+            self.helpEdit.setFontFamily("Monospace")
+        
+        try:
+            f = open(helpfile, "r", encoding = "utf-8")
+            txt = f.read()
+            f.close()
+            self.helpEdit.setPlainText(txt)
+        except IOError as err:
+            self.helpEdit.setPlainText(
+                self.trUtf8("Could not read file {0}.\nReason: {1}")\
+                    .format(helpfile, str(err)))
+
+    def on_buttonBox_clicked(self, button):
+        """
+        Private slot called by a button of the button box clicked.
+        
+        @param button button that was clicked (QAbstractButton)
+        """
+        if button == self.searchButton:
+            if self.__searchDlg is None:
+                self.__searchDlg = SearchDialog(self)
+            self.__searchDlg.showFind()
+    
+    def findNextPrev(self, txt, case, word, backwards):
+        """
+        Public slot to find the next occurrence of a text.
+        
+        @param txt text to search for (string)
+        @param case flag indicating a case sensitive search (boolean)
+        @param word flag indicating a word based search (boolean)
+        @param backwards flag indicating a backwards search (boolean)
+        """
+        doc = self.helpEdit.document()
+        cur = self.helpEdit.textCursor()
+        
+        findFlags = QTextDocument.FindFlags()
+        if case:
+            findFlags |= QTextDocument.FindCaseSensitively
+        if word:
+            findFlags |= QTextDocument.FindWholeWords
+        if backwards:
+            findFlags |= QTextDocument.FindBackward
+        
+        if cur.hasSelection():
+            cur.setPosition(backwards and cur.anchor() or cur.position(), 
+                            QTextCursor.MoveAnchor)
+        newCur = doc.find(txt, cur, findFlags)
+        if newCur.isNull():
+            return False
+        else:
+            self.helpEdit.setTextCursor(newCur)
+            return True
+    
+    def helpWidget(self):
+        """
+        Public method to get a reference to the help widget.
+        
+        @return reference to the help widget (QTextEdit)
+        """
+        return self.helpEdit