From 72957f4d51265f2d0e61d90f92ba42a6e2f92726 Mon Sep 17 00:00:00 2001
From: Janus <ysangkok@gmail.com>
Date: Mon, 3 Dec 2018 15:33:51 +0100
Subject: [PATCH] qt_standardmodel: only use proxymodel when appropriate

---
 electrum/gui/qt/history_list.py | 10 ++++------
 electrum/gui/qt/util.py         | 26 +++++++++++++-------------
 2 files changed, 17 insertions(+), 19 deletions(-)

diff --git a/electrum/gui/qt/history_list.py b/electrum/gui/qt/history_list.py
index 807484f9b..f2feba9dd 100644
--- a/electrum/gui/qt/history_list.py
+++ b/electrum/gui/qt/history_list.py
@@ -75,8 +75,7 @@ class HistoryList(MyTreeView, AcceptFileDragDrop):
 
     def should_hide(self, proxy_row):
         if self.start_timestamp and self.end_timestamp:
-            source_idx = self.proxy.mapToSource(self.proxy.index(proxy_row, 0))
-            item = self.std_model.itemFromIndex(source_idx)
+            item = self.item_from_coordinate(proxy_row, 0)
             txid = item.data(self.TX_HASH_ROLE)
             date = self.transactions[txid]['date']
             if date:
@@ -418,9 +417,8 @@ class HistoryList(MyTreeView, AcceptFileDragDrop):
         # TODO update unconfirmed tx'es
 
     def on_edited(self, index, user_role, text):
-        column = index.column()
-        index = self.proxy.mapToSource(index)
-        item = self.std_model.itemFromIndex(index)
+        row, column = index.row(), index.column()
+        item = self.item_from_coordinate(row, column)
         key = item.data(self.TX_HASH_ROLE)
         # fixme
         if column == 2:
@@ -441,7 +439,7 @@ class HistoryList(MyTreeView, AcceptFileDragDrop):
 
     def mouseDoubleClickEvent(self, event: QMouseEvent):
         idx = self.indexAt(event.pos())
-        item = self.std_model.itemFromIndex(self.proxy.mapToSource(idx))
+        item = self.item_from_coordinate(idx.row(), idx.column())
         if not item or item.isEditable():
             super().mouseDoubleClickEvent(event)
         elif item:
diff --git a/electrum/gui/qt/util.py b/electrum/gui/qt/util.py
index e320715a1..0d386bdfc 100644
--- a/electrum/gui/qt/util.py
+++ b/electrum/gui/qt/util.py
@@ -468,15 +468,12 @@ class MyTreeView(QTreeView):
         pt.setX(50)
         self.customContextMenuRequested.emit(pt)
 
-    def createEditor(self, parent, option, index):
+    def createEditor(self, parent, option, idx):
         self.editor = QStyledItemDelegate.createEditor(self.itemDelegate(),
-                                                       parent, option, index)
-        persistent = QPersistentModelIndex(index)
-        user_role = index.data(Qt.UserRole)
+                                                       parent, option, idx)
+        item = self.item_from_coordinate(idx.row(), idx.column())
+        user_role = item.data(Qt.UserRole)
         assert user_role is not None
-        idx = QModelIndex(persistent)
-        index = self.proxy.mapToSource(idx)
-        item = self.std_model.itemFromIndex(index)
         prior_text = item.text()
         def editing_finished():
             # Long-time QT bug - pressing Enter to finish editing signals
@@ -524,6 +521,14 @@ class MyTreeView(QTreeView):
         """
         pass
 
+    def item_from_coordinate(self, row_num, column):
+        if isinstance(self.model(), QSortFilterProxyModel):
+            idx = self.model().mapToSource(self.model().index(row_num, column))
+            return self.model().sourceModel().itemFromIndex(idx)
+        else:
+            idx = self.model().index(row_num, column)
+            return self.model().itemFromIndex(idx)
+
     def hide_row(self, row_num):
         """
         row_num is for self.model(). So if there is a proxy, it is the row number
@@ -535,12 +540,7 @@ class MyTreeView(QTreeView):
             self.setRowHidden(row_num, QModelIndex(), False)
             return
         for column in self.filter_columns:
-            if isinstance(self.model(), QSortFilterProxyModel):
-                idx = self.model().mapToSource(self.model().index(row_num, column))
-                item = self.model().sourceModel().itemFromIndex(idx)
-            else:
-                idx = self.model().index(row_num, column)
-                item = self.model().itemFromIndex(idx)
+            item = self.item_from_coordinate(row_num, column)
             txt = item.text().lower()
             if self.current_filter in txt:
                 # the filter matched, but the date filter might apply