Scenario: Add X, Y position for tree display.

src/Model/Scenario.py

@@ -29,12 +29,14 @@ class Scenario(SQLSubModel):
                  id: int = -1,
                  name: str = "",
                  description: str = "",
+                 x: int = 0.0, y: int = 0.0,
                  revision: int = 0,
                  parent=None):
         super(Scenario, self).__init__()
 
         self._set_id(id)
 
+        self._x, self._y = x, y
         self._name = name
         self._description = description
         self._revision = revision
@@ -54,11 +56,21 @@ class Scenario(SQLSubModel):
     def id(self):
         return self._id
 
+    @property
+    def x(self):
+        return self._x
+
+    @property
+    def y(self):
+        return self._y
+
     @classmethod
     def _db_create(cls, execute):
         execute("""
           CREATE TABLE scenario(
             id INTEGER PRIMARY KEY,
+            x REAL NOT NULL DEFAULT 1000,
+            y REAL NOT NULL DEFAULT 1000,
             name TEXT NOT NULL,
             description TEXT NOT NULL,
             revision INTEGER NOT NULL,
@@ -73,10 +85,10 @@ class Scenario(SQLSubModel):
     def _db_add_default(cls, execute):
         execute(
             "INSERT OR REPLACE INTO " +
-            "scenario(id, name, description, revision, parent_id) " +
+            "scenario(id, x, y, name, description, revision, parent_id) " +
-            "VALUES (" +
+            "VALUES (\n" +
-            "  0, 'default', 'Default scenario',\n" +
+            "  0, 1000, 1000, 'default', 'Default scenario',\n" +
-            "  0, NULL" +
+            "  0, NULL\n" +
             ")"
         )
 
@@ -96,6 +108,17 @@ class Scenario(SQLSubModel):
                 cls._db_create(execute)
                 cls._db_add_default(execute)
 
+        if major == "0" and minor == "1":
+            if int(release) < 2:
+                execute(
+                    "ALTER TABLE scenario " +
+                    "ADD COLUMN x REAL NOT NULL DEFAULT 1000"
+                )
+                execute(
+                    f"ALTER TABLE scenario " +
+                    "ADD COLUMN x REAL NOT NULL DEFAULT 1000"
+                )
+
         return True
 
     @classmethod
@@ -116,7 +139,7 @@ class Scenario(SQLSubModel):
         scenarios = {}
 
         table = execute(
-            "SELECT id, name, description, revision, parent_id " +
+            "SELECT id, x, y, name, description, revision, parent_id " +
             "FROM scenario " +
             "ORDER BY id ASC"
         )
@@ -125,6 +148,7 @@ class Scenario(SQLSubModel):
             it = iter(row)
 
             id = next(it)
+            x, y = next(it), next(it)
             name = next(it)
             desc = next(it)
             revi = next(it)
@@ -134,7 +158,8 @@ class Scenario(SQLSubModel):
                 parent = scenarios[parent]
 
             new = cls(
-                id=id, name=name, description=desc,
+                id=id, x=x, y=y,
+                name=name, description=desc,
                 revision=revi, parent=parent
             )
             scenarios[id] = new
@@ -148,9 +173,10 @@ class Scenario(SQLSubModel):
 
         execute(
             "INSERT OR REPLACE INTO " +
-            "scenario(id, name, description, revision, parent_id) " +
+            "scenario(id, x, y, name, description, revision, parent_id) " +
             "VALUES (" +
             f"{self._id}, " +
+            f"{self.x}, {self.y} " +
             f"'{self._db_format(self.name)}', " +
             f"'{self._db_format(self.description)}', " +
             f"{self._revision}, " +

src/Model/Study.py

@@ -43,7 +43,7 @@ class Study(SQLModel):
 
     def __init__(self, filename=None, init_new=True):
         # Metadata
-        self._version = "0.1.1"
+        self._version = "0.1.2"
         self.creation_date = datetime.now()
         self.last_modification_date = datetime.now()
         self.last_save_date = datetime.now()

src/View/Scenarios/GraphWidget.py

@@ -53,6 +53,8 @@ class ScenarioItem(QGraphicsTextItem):
         self.graph = graph_widget
         self.scenario = scenario
 
+        self.setPos(QPointF(self.scenario.x, self.scenario.y))
+
         self.setPlainText(self.scenario.name)
         self.setDefaultTextColor(Qt.black)