Added a help dialog. It needs filling out.

In the next version, get rid of the top-left directory chooser and just use
the listbox navigation....double click on column 1

dirnotes

@@ -2,14 +2,17 @@
 """ a simple gui or command line app
 to view and create/edit file comments
 
-comments are stored in xattr user.xdg.comment
+comments are stored in an SQLite3 database
+	default ~/.dirnotes.db
+where possible, comments are duplicated in 
+	xattr user.xdg.comment
+	depends on python-pyxattr
 
-depends on python-pyxattr
+	some file systems don't allow xattr, and even linux
+	doesn't allow xattr on symlinks, so the database is
+	considered primary
 
-because files are so often over-written, save a copy
-of the comments in a database ~/.dirnotes.db
-
-these comments stick to the symlink
+	these comments stick to the symlink, not the deref
 
 """
 
@@ -170,6 +173,30 @@ class SortableTableWidgetItem(QTableWidgetItem):
 	def __lt__(self, other):
 		return self.sortValue < other.sortValue
 
+class HelpWidget(QDialog):
+	def __init__(self, parent):
+		super(QDialog, self).__init__(parent)
+		self.layout = QVBoxLayout(self)
+		self.tb = QLabel(self)
+		self.tb.setWordWrap(True)
+		msg = """<h1>Overview</h1>
+This app allows you to add comments to files. The comments are stored in 
+a database, and where possible, saved in the xattr (hidden attributes) 
+field of the file system.
+<p>
+You can sort the directory listing by clicking on the column heading.
+<p>
+The small box at the top left lets you navigate the directory listings.
+
+"""
+		self.tb.setText(msg)
+		self.tb.setFixedWidth(600)
+		self.pb = QPushButton('OK',self)
+		self.pb.setFixedWidth(200)
+		self.layout.addWidget(self.tb)
+		self.layout.addWidget(self.pb)
+		self.pb.pressed.connect(self.close)
+		self.show()
 
 class DirNotes(QMainWindow):
 	''' the main window of the app
@@ -249,6 +276,7 @@ class DirNotes(QMainWindow):
 		mf.addAction("Restore comment from database", self.restore_from_database, "Ctrl+R")
 		mf.addSeparator()
 		mf.addAction("Quit", self.close, "Ctrl+Q")
+		mf.addAction("About", self.about, "Ctrl+H")
 
 		#~ QShortcut(QKeySequence("Ctrl+Q"), self, self.close)	
 		self.setWindowTitle("DirNotes   Alt-F for menu  Dir: "+self.curPath)
@@ -265,6 +293,8 @@ class DirNotes(QMainWindow):
 	def sbn(self):
 		print("sort by name")
 		self.lb.sortItems(0)
+	def about(self):
+		HelpWidget(self)
 	def sbc(self):
 		print("sort by comment")
 		self.lb.sortItems(3,QtCore.Qt.DescendingOrder)
@@ -295,7 +325,7 @@ class DirNotes(QMainWindow):
 			self.files = self.files + [this_file]
 			item = QTableWidgetItem(d[i])
 			item.setFlags(QtCore.Qt.ItemIsEnabled)
-			item.setData(32,this_file)	# keep a hidden copy of the full path
+			item.setData(32,this_file)	# keep a hidden copy of the file object
 			self.lb.setItem(i,0,item)
 			#lb.itemAt(i,0).setFlags(Qt.ItemIsEnabled) #NoItemFlags) 
 			comment = this_file.getComment()
@@ -325,7 +355,7 @@ class DirNotes(QMainWindow):
 		print("      selected file: "+self.lb.item(x.row(),0).data(32).toPyObject().getName())
 		the_file = self.lb.item(x.row(),0).data(32).toPyObject()
 		print("      and the row file is "+the_file.getName())
-		r = the_file.setComment(str(x.text())) ## fix me store the FileObj in the data
+		r = the_file.setComment(str(x.text())) 
 		if r:
 			self.db.log(the_file.getName(),x.text())
 	def restore_from_database(self):