today nick learns about the QDataWidgetMapper, which solves all his problems

apps/modes_gui

@@ -66,9 +66,10 @@ class mainwindow(QtGui.QMainWindow):
         self.ui.list_aircraft.setModelColumn(0)
         self.icaodelegate = ICAOViewDelegate()
         self.ui.list_aircraft.setItemDelegate(self.icaodelegate)
-        #self.ui.list_aircraft.show() #TODO remove
+        self.dashboard_mapper = QtGui.QDataWidgetMapper()
+        self.dashboard_mapper.setModel(self.datamodel)
+        self.dashboard_mapper.addMapping(self.ui.line_ident, 2)
 
-        #todo add a custom delegate for the QListView
 
     #goes and gets valid antenna, sample rate options from the device and grays out appropriate things
     def populate_source_options(self):
@@ -207,23 +208,18 @@ class mainwindow(QtGui.QMainWindow):
     #refresh dashboard display with info from clicked aircraft.
     #this can either be on-click (hence the name for auto slot) or
     #due to a database update.
-    #this is all due to be replaced by model accesses. do not update.
     def on_list_aircraft_clicked(self, index):
         icao = long(str(index.data().toString()), 16)
         #icao = index.data().toInt()[0]
         self.db = sqlite3.connect(self.dbname)
         
-        #get ident
+        #self.ui.line_ident.clear()
-        q = "select ident from ident where icao=%i" % icao
+        #self.ui.line_ident.insert(index.model().data(index.model().index(index.row(), 2)))
-        cursor = self.db.cursor()
+        self.dashboard_mapper.setCurrentIndex(index.row())
-        cursor.execute(q)
-        ident = cursor.fetchall()
-        self.ui.line_ident.clear()
-        if len(ident) > 0:
-            self.ui.line_ident.insert(ident[-1][0])
 
         #get vector info
         q = "select seen, speed, heading, vertical from vectors where icao=%i order by seen desc limit 1" % icao
+        cursor = self.db.cursor()
         cursor.execute(q)
         r = cursor.fetchall()
         speed = "-"
@@ -248,17 +244,12 @@ class ICAOViewDelegate(QtGui.QStyledItemDelegate):
         last_report = index.model().data(index.model().index(index.row(), 1))
         age = (datetime.datetime.now() - datetime.datetime.strptime(str(last_report), "%Y-%m-%d %H:%M:%S")).total_seconds()
         #minimum alpha is 0x40 (oldest), max is 0xFF (newest)
-        alpha = min(abs(0xFF - (0xBF / 600.) * age), 0x40)
+        alpha = 0xFF - (0xBF / 600.) * min(age, 600)
         painter.setPen(QtGui.QColor(0, 0, 0, alpha))
         #QtGui.QStyledItemDelegate.paint(self, painter, option, index)
         painter.drawText(option.rect.left()+3, option.rect.top(), option.rect.width(), option.rect.height(), option.displayAlignment, paintstr)
+        #TODO: draw highlight for selection
 
-#eventually: set up a QTimer or whatever and have it self-update and emit dataChanged()
-#better yet just have the SQL interface yell and say hey that line changed.
-#on selected aircraft or on update for visible aircraft, emit signal to update current dashboard display.
-#maybe the datamodel should be responsible for inserting data into the SQL db as well, making this the
-#main interface. this could subclass modes_sql for insert functionality. then you get the ability to
-#invalidate on update.
 class modes_datamodel(QtCore.QAbstractItemModel):
     def __init__(self, db):
         QtCore.QAbstractItemModel.__init__(self)
@@ -274,31 +265,42 @@ class modes_datamodel(QtCore.QAbstractItemModel):
     def columnCount(self, parent=QtCore.QModelIndex()):
         return 2
 
+    #for future use
+    def flags(self, index):
+        return QtCore.QAbstractItemModel.flags(self, index)
+    
     def data(self, index, role=QtCore.Qt.DisplayRole):
         if not index.isValid():
             return QtCore.QVariant()
         if index.row() >= self.rowCount():
             return QtCore.QVariant()
-        if role != QtCore.Qt.DisplayRole:
+        if role == QtCore.Qt.DisplayRole or role == QtCore.Qt.EditRole:
-            return QtCore.QVariant()
+            #get ICAO of current index
-
-        #TODO eventually find a way to populate the ICAOs with fading according to age
-        icaoquery = "select distinct icao from positions order by icao limit %i,1" % index.row()
             query = QtSql.QSqlQuery()
+            #TODO: limit this to aircraft seen in last 600 seconds? or make a spinbox for this limit.
+            icaoquery = "select distinct icao from positions order by icao limit %i,1" % index.row()
             query.exec_(icaoquery)
             query.next()
             icao = query.value(0).toInt()[0]
-        icaostr = "%06x" % icao
+            if index.column() == 0: #ICAO
+                return "%06x" % icao
+            elif index.column() == 1: #last seen
                 seenquery = "select seen from positions where icao = %i order by seen desc limit 1" % icao
-        query = QtSql.QSqlQuery()
                 query.exec_(seenquery)
                 query.next()
-        seen = query.value(0).toString()
+                return query.value(0).toString()
-        if index.column() == 0:
+            elif index.column() == 2: #ident
-            return icaostr
+                identquery = "select ident from ident where icao = %i" % icao
-        if index.column() == 1:
+                query.exec_(identquery)
-            return seen
+                if query.next() is False:
+                    return ""
+                return query.value(0).toString()
+            elif index.column() == 3: #last position
+                return QtCore.QVariant()
+            elif index.column() == 4: #last vector
+                return QtCore.QVariant()
 
+        else:
             return QtCore.QVariant()
 
     def index(self, row, column, parent=QtCore.QModelIndex()):