From 63caaa2ecd9732048b4bd844594cc08e3b56a4ed Mon Sep 17 00:00:00 2001
From: Clemens Richter <csrichter@gmx.de>
Date: Tue, 18 Apr 2017 13:03:59 +0200
Subject: [PATCH] clunky, but functional auto-auto-scroll

---
 grc/multirds_tmc_parser.xml   | 16 +---------------
 python/rds_parser_table_qt.py |  2 +-
 python/tmc_parser.py          | 20 +++++++++++++-------
 3 files changed, 15 insertions(+), 23 deletions(-)

diff --git a/grc/multirds_tmc_parser.xml b/grc/multirds_tmc_parser.xml
index 7f70b2d..ce2f26a 100644
--- a/grc/multirds_tmc_parser.xml
+++ b/grc/multirds_tmc_parser.xml
@@ -9,7 +9,7 @@
 #if not $label()
 	#set $label = '"%s"'%$id
 #end if
-$(parser) = multirds.tmc_parser($workdir, $log, $debug, $writeDB,$maxheight,$auto_scroll)
+$(parser) = multirds.tmc_parser($workdir, $log, $debug, $writeDB,$maxheight)
 $(win) = $(parser).getqtwidget()
 $(gui_hint()($win))
   </make>
@@ -66,20 +66,6 @@ $(gui_hint()($win))
 			<key>False</key>
 		</option>
 	</param>
-        <param>
-                <name>auto_scroll</name>
-                <key>auto_scroll</key>
-                <value>True</value>
-                <type>bool</type>
-                <option>
-                        <name>Enable</name>
-                        <key>True</key>
-                </option>
-                <option>
-                        <name>Disable</name>
-                        <key>False</key>
-                </option>
-        </param>
 	<param>
 		<name>write Database</name>
 		<key>writeDB</key>
diff --git a/python/rds_parser_table_qt.py b/python/rds_parser_table_qt.py
index a13f1fa..d9d3660 100644
--- a/python/rds_parser_table_qt.py
+++ b/python/rds_parser_table_qt.py
@@ -74,7 +74,7 @@ class rds_parser_table_qt(gr.sync_block):#START
         self.message_port_register_out(pmt.intern('ctrl'))
         self.message_port_register_out(pmt.intern('tmc_raw'))
         
-        self.TMC_without_CT=False
+        self.TMC_without_CT=True
         self.log=log
         self.debug=debug
         self.writeDB=writeDB
diff --git a/python/tmc_parser.py b/python/tmc_parser.py
index 44ddc5c..36c37cf 100644
--- a/python/tmc_parser.py
+++ b/python/tmc_parser.py
@@ -33,7 +33,7 @@ class tmc_parser(gr.sync_block):
     """
     docstring for block tmc_parser
     """
-    def __init__(self, workdir,log,debug,writeDB,maxheight,auto_scroll):
+    def __init__(self, workdir,log,debug,writeDB,maxheight):
         gr.sync_block.__init__(self,
             name="tmc_parser",
             in_sig=None,
@@ -42,7 +42,7 @@ class tmc_parser(gr.sync_block):
         self.debug=debug
         self.workdir=workdir
         self.writeDB=writeDB
-        self.qtwidget=tmc_parser_Widget(self,maxheight,auto_scroll)
+        self.qtwidget=tmc_parser_Widget(self,maxheight)
         self.message_port_register_in(pmt.intern('in'))
         self.set_msg_handler(pmt.intern('in'), self.handle_msg)
         self.tmc_meta={}
@@ -245,15 +245,22 @@ class tmc_parser(gr.sync_block):
         return return_string
 class tmc_parser_Widget(QtGui.QWidget):
     def print_tmc_msg(self,tmc_msg):
+        sb=self.logOutput.verticalScrollBar()
+        oldmax=sb.maximum()
+        auto_scroll= abs(oldmax-sb.value())<60#auto_scroll if scrollbar was at max
+        #print("%i %i %r"%(sb.maximum(),sb.value(),auto_scroll))
         ef=unicode(self.event_filter.text().toUtf8(), encoding="UTF-8").lower()
         lf=unicode(self.location_filter.text().toUtf8(), encoding="UTF-8").lower()
         filters=[{"type":"location", "str":lf},{"type":"event", "str":ef}]
         if self.parser.tmc_messages.matchFilter(tmc_msg,filters):
             self.logOutput.append(Qt.QString.fromUtf8(tmc_msg.log_string()))
             self.logOutput.append(Qt.QString.fromUtf8(tmc_msg.multi_str()))
-        if self.auto_scroll:
-            scroll_max=self.logOutput.verticalScrollBar().maximum()
-            self.logOutput.verticalScrollBar().setValue(scroll_max)
+            #print("new message")
+        if auto_scroll:
+            sb=self.logOutput.verticalScrollBar()
+            new_max=sb.maximum()
+            sb.setValue(new_max)
+            #print("scrolling %i %i %r"%(oldmax,new_max,sb.value()))
         #code.interact(local=locals())
     def updateui(self):
         print("updating ui")
@@ -264,12 +271,11 @@ class tmc_parser_Widget(QtGui.QWidget):
         filters=[{"type":"location", "str":lf},{"type":"event", "str":ef}]
         self.logOutput.append(Qt.QString.fromUtf8(self.parser.tmc_messages.getLogString(filters)))
         print("filter changed")
-    def __init__(self, parser,maxheight,auto_scroll):
+    def __init__(self, parser,maxheight):
         QtGui.QWidget.__init__(self)
         layout = Qt.QVBoxLayout()
         self.setLayout(layout)
         self.parser=parser
-        self.auto_scroll=auto_scroll
         self.tmc_message_label=QtGui.QLabel("TMC messages:")
         self.event_filter=QtGui.QLineEdit()#QPlainTextEdit ?
         self.location_filter=QtGui.QLineEdit(u"Baden-Württemberg")