Annotation balloon are regrouped and created in circle

ahb_cmd_view_annotate.py

@@ -1,3 +1,4 @@
+import math
 import FreeCADGui as Gui
 import FreeCAD as App
 
@@ -73,5 +74,67 @@ class AHB_View_Annotate:
 			
 		workbench.techDrawExtensions.refreshOverlays(page)
 
+		regroupedBalloons = self.RegroupNearestSimilarBalloons(balloonsCreated)
+		self.PlaceBalloonsInCircle(regroupedBalloons)
+
+	def CalculatePointsCenter(self, balloons):
+		totalX = 0
+		totalY = 0
+		for balloon in balloons:
+			realBalloon = balloon[0] if type(balloon) is list else balloon
+			totalX = totalX + int(realBalloon.OriginX)
+			totalY = totalY + int(realBalloon.OriginY)
+		return App.Base.Vector2d(totalX / len(balloons), totalY / len(balloons))
+
+	def IsSimilarBalloonNear(self, balloonA, balloonB):
+		MAX_DISTANCE_BETWEEN_REGROUPED_BALLOONS = 50
+		if balloonA.Text == balloonB.Text:
+			pos = App.Base.Vector2d(balloonA.OriginX, balloonA.OriginY)
+			dist = pos.distance(App.Base.Vector2d(balloonB.OriginX, balloonB.OriginY))
+			return dist < MAX_DISTANCE_BETWEEN_REGROUPED_BALLOONS
+		else:
+			return False
+
+	def RegroupNearestSimilarBalloons(self, balloons):
+		regroupedBalloons = []
+		for balloon in balloons:
+			nearestBalloons = []
+			for otherBalloon in balloons:
+				if otherBalloon != balloon and self.IsSimilarBalloonNear(balloon, otherBalloon):
+					nearestBalloons.append(otherBalloon)
+					balloons.remove(otherBalloon)
+			if len(nearestBalloons) == 0:
+				regroupedBalloons.append(balloon)
+			else:
+				nearestBalloons.append(balloon)
+				regroupedBalloons.append(nearestBalloons)
+		return regroupedBalloons
+
+	def PlaceBalloonsInCircle(self, balloons):
+		center = self.CalculatePointsCenter(balloons)
+		nbBalloons = len(balloons)
+		balloonPosStep = (math.pi * 2) / nbBalloons
+		for i in range(nbBalloons):
+			balloonPos = App.Base.Vector2d(center.x + 600 * math.cos(balloonPosStep * i), center.y + 600 * math.sin(balloonPosStep * i))
+			# Find nearest arrow to avoid arrow crossing each other
+			smallestDistance = 0
+			balloonToUse = None
+			for balloon in balloons:
+				realBalloon = balloon[0] if type(balloon) is list else balloon
+				dist = balloonPos.distance(App.Base.Vector2d(realBalloon.OriginX, realBalloon.OriginY))
+				if smallestDistance == 0 or dist < smallestDistance:
+					smallestDistance = dist
+					balloonToUse = balloon
+
+			if balloonToUse is not None:
+				balloons.remove(balloonToUse)
+				if type(balloonToUse) is list:
+					for realBalloon in balloonToUse:
+						realBalloon.X = balloonPos.x
+						realBalloon.Y = balloonPos.y
+				else:
+					balloonToUse.X = balloonPos.x
+					balloonToUse.Y = balloonPos.y
+
 from ahb_command import AHB_CommandWrapper
 AHB_CommandWrapper.addGuiCommand('AHB_view_annotate', AHB_View_Annotate())

ahb_techdraw_extensions.py

@@ -457,6 +457,7 @@ class TechDrawExtensions:
 			self.updating_balloon = False
 			
 	def add_or_update_balloon(self, view, part, parent_path):
+		balloonsCreated = []
 		page = self.getViewPage(view)
 		overlay_view = self.getOverlayView(view)
 		doc = page.Document
@@ -498,8 +499,7 @@ class TechDrawExtensions:
 				
 				self.updateBalloon(balloon)
 				
-				balloon.X = int(balloon.OriginX) + 20
-				balloon.Y = int(balloon.OriginY) + 20
+				balloonsCreated.append(balloon)
 				
 				if not self.isNewPartInView(view, part):
 					balloon.ViewObject.Visibility = False