From 560c21c59d57049ade7d0e149e02312dc519bdb6 Mon Sep 17 00:00:00 2001
From: Damien Elmes <git@ichi2.net>
Date: Mon, 30 Apr 2018 16:26:19 +1000
Subject: [PATCH] add experimental scheduler to preferences

---
 aqt/preferences.py      | 27 ++++++++++++++++++++++++-
 designer/preferences.ui | 44 ++++++++++++++++++++++++++++++++++++-----
 2 files changed, 65 insertions(+), 6 deletions(-)

diff --git a/aqt/preferences.py b/aqt/preferences.py
index 5a570a18b..8a9b81676 100644
--- a/aqt/preferences.py
+++ b/aqt/preferences.py
@@ -5,7 +5,8 @@
 import datetime, time
 from aqt.qt import *
 import anki.lang
-from aqt.utils import openFolder, showWarning, getText, openHelp, showInfo
+from aqt.utils import openFolder, showWarning, getText, openHelp, showInfo, \
+    askUser
 import aqt
 
 class Preferences(QDialog):
@@ -86,6 +87,8 @@ class Preferences(QDialog):
         f.dayLearnFirst.setChecked(qc.get("dayLearnFirst", False))
         if self.mw.col.schedVer() != 2:
             f.dayLearnFirst.setVisible(False)
+        else:
+            f.newSched.setChecked(True)
 
     def updateCollection(self):
         f = self.form
@@ -100,8 +103,30 @@ class Preferences(QDialog):
         qc['addToCur'] = not f.useCurrent.currentIndex()
         qc['dayLearnFirst'] = f.dayLearnFirst.isChecked()
         self._updateDayCutoff()
+        self._updateSchedVer(f.newSched.isChecked())
         d.setMod()
 
+    # Scheduler version
+    ######################################################################
+
+    def _updateSchedVer(self, wantNew):
+        haveNew = self.mw.col.schedVer() == 2
+
+        # nothing to do?
+        if haveNew == wantNew:
+            return
+
+        if haveNew and not wantNew:
+            if not askUser(_("This will reset any cards in learning, clear filtered decks, and change the scheduler version. Proceed?")):
+                return
+            self.mw.col.changeSchedulerVer(1)
+            return
+
+        if not askUser(_("The experimental scheduler could cause incorrect scheduling. Please ensure you have read the documentation first. Proceed?")):
+            return
+
+        self.mw.col.changeSchedulerVer(2)
+
     # Day cutoff
     ######################################################################
 
diff --git a/designer/preferences.ui b/designer/preferences.ui
index 45ff8e9e0..a8c2839fa 100644
--- a/designer/preferences.ui
+++ b/designer/preferences.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>405</width>
-    <height>455</height>
+    <height>469</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -30,7 +30,16 @@
        <property name="spacing">
         <number>12</number>
        </property>
-       <property name="margin">
+       <property name="leftMargin">
+        <number>12</number>
+       </property>
+       <property name="topMargin">
+        <number>12</number>
+       </property>
+       <property name="rightMargin">
+        <number>12</number>
+       </property>
+       <property name="bottomMargin">
         <number>12</number>
        </property>
        <item>
@@ -92,6 +101,13 @@
          </property>
         </widget>
        </item>
+       <item>
+        <widget class="QCheckBox" name="newSched">
+         <property name="text">
+          <string>Experimental V2 scheduler</string>
+         </property>
+        </widget>
+       </item>
        <item>
         <widget class="QComboBox" name="useCurrent">
          <item>
@@ -217,7 +233,16 @@
        <property name="spacing">
         <number>12</number>
        </property>
-       <property name="margin">
+       <property name="leftMargin">
+        <number>12</number>
+       </property>
+       <property name="topMargin">
+        <number>12</number>
+       </property>
+       <property name="rightMargin">
+        <number>12</number>
+       </property>
+       <property name="bottomMargin">
         <number>12</number>
        </property>
        <item>
@@ -322,7 +347,16 @@
        <property name="spacing">
         <number>12</number>
        </property>
-       <property name="margin">
+       <property name="leftMargin">
+        <number>12</number>
+       </property>
+       <property name="topMargin">
+        <number>12</number>
+       </property>
+       <property name="rightMargin">
+        <number>12</number>
+       </property>
+       <property name="bottomMargin">
         <number>12</number>
        </property>
        <item>
@@ -445,12 +479,12 @@
   <tabstop>pastePNG</tabstop>
   <tabstop>nightMode</tabstop>
   <tabstop>dayLearnFirst</tabstop>
+  <tabstop>newSched</tabstop>
   <tabstop>useCurrent</tabstop>
   <tabstop>newSpread</tabstop>
   <tabstop>dayOffset</tabstop>
   <tabstop>lrnCutoff</tabstop>
   <tabstop>timeLimit</tabstop>
-  <tabstop>buttonBox</tabstop>
   <tabstop>numBackups</tabstop>
   <tabstop>syncOnProgramOpen</tabstop>
   <tabstop>tabWidget</tabstop>