Label wrapping

eddy/core/items/common.py

@@ -296,6 +296,8 @@ def __init__(self, template='', movable=True, editable=True, parent=None):
         self.setFont(Font(weight=Font.Light))
         self.setText(self.template)
         self.setTextInteractionFlags(QtCore.Qt.NoTextInteraction)
+        self.setToolTip(template)
+        self.wrapLabel()
 
         self.customFont = False
 
@@ -306,7 +308,7 @@ def setCustomFont(self, font):
         if not font==self.font():
             npos = self.pos()
             self.setFont(font)
-            self.setAlignment(self.alignment())
+            self.wrapLabel()
             self.setPos(npos)
         self.customFont = True
 
@@ -327,7 +329,7 @@ def sceneEvent(self, event: QtCore.QEvent) -> bool:
                 # UPDATE THE DOCUMENT FONT AND ADJUST ITEM SIZE AND POSITION
                 npos = self.pos()
                 self.setFont(nfont)
-                self.setAlignment(self.alignment())
+                self.wrapLabel()
                 self.setPos(npos)
             # CASCADE THE EVENT TO EACH CHILD ITEM
             for item in self.childItems():
@@ -380,12 +382,12 @@ def focusOutEvent(self, focusEvent):
 
             self.focusInData = None
             self.setSelectedText(False)
-            self.setAlignment(self.alignment())
+            self.wrapLabel()
             self.setTextInteractionFlags(QtCore.Qt.NoTextInteraction)
             self.diagram.setMode(DiagramMode.Idle)
             self.diagram.sgnUpdated.emit()
 
-        self.setAlignment(self.alignment())
+        self.wrapLabel()
         self.setTextInteractionFlags(QtCore.Qt.NoTextInteraction)
         super().focusOutEvent(focusEvent)
 
@@ -525,8 +527,6 @@ def setAlignment(self, alignment):
         :type alignment: int
         """
         self._alignment = alignment
-        self.setTextWidth(-1)
-        self.setTextWidth(self.boundingRect().width())
         format_ = QtGui.QTextBlockFormat()
         format_.setAlignment(alignment)
         cursor = self.textCursor()
@@ -602,6 +602,14 @@ def width(self):
         """
         return self.boundingRect().width()
 
+    def wrapLabel(self):
+        """
+        Wrap label into node.
+        """
+        self.setTextWidth(-1)
+        self.setTextWidth(self.boundingRect().width())
+        self.setAlignment(self.alignment())
+
     def __repr__(self):
         """
         Returns repr(self).

eddy/core/items/nodes/common/label.py

@@ -33,9 +33,15 @@
 ##########################################################################
 
 
-from PyQt5 import QtCore
+from math import ceil
+
+from PyQt5 import (
+    QtCore,
+    QtGui,
+)
 
 from eddy.core.commands.labels import CommandLabelChange
+from eddy.core.datatypes.graphol import Item
 from eddy.core.datatypes.misc import DiagramMode
 from eddy.core.functions.misc import isEmpty
 from eddy.core.items.common import AbstractLabel
@@ -45,6 +51,9 @@ class NodeLabel(AbstractLabel):
     """
     This class implements the label to be attached to the graphol nodes.
     """
+    MinWidth = 60.0  # Minimum label width (in pixels)
+    MinHeight = 40.0  # Minimum label height (in pixels)
+
     def __init__(self, template='', pos=None, movable=True, editable=True, parent=None):
         """
         Initialize the label.
@@ -100,6 +109,24 @@ def updatePos(self, moved=False):
         if not moved:
             self.setPos(self.defaultPos())
 
+    def wrapLabel(self):
+        """
+        Wrap label into node.
+        """
+        super().wrapLabel()
+        if self.parentItem() and self.parentItem().type() in [Item.ConceptNode,
+                                                              Item.IndividualNode,
+                                                              Item.ValueDomainNode,
+                                                              Item.LiteralNode,
+                                                              Item.FacetNode]:
+            width = max(self.MinWidth, self.parentItem().width())
+            height = max(self.MinHeight, self.parentItem().height())
+            fm = QtGui.QFontMetrics(self.font())
+            lineWidth = fm.width(self.template) / ceil(fm.width(self.template) / width)
+            maxWidth = int(lineWidth * (height // fm.lineSpacing()))
+            self.setText(fm.elidedText(self.template, QtCore.Qt.TextElideMode.ElideRight, maxWidth))
+            self.setTextWidth(width)
+        self.setAlignment(self.alignment())
 
 class PredicateLabel(NodeLabel):
     """

eddy/core/items/nodes/concept.py

@@ -381,6 +381,7 @@ def resize(self, mousePos):
         self.polygon.setGeometry(polygon)
 
         self.updateNode(selected=True, handle=self.mp_Handle, anchors=(self.mp_Data, D))
+        self.label.wrapLabel()
         self.updateTextPos(moved=moved)
 
     def setIdentity(self, identity):

eddy/core/items/nodes/individual.py

@@ -610,6 +610,7 @@ def resize(self, mousePos):
         self.polygon.setGeometry(polygon)
 
         self.updateNode(selected=True, handle=self.mp_Handle, anchors=(self.mp_Data, D))
+        self.label.wrapLabel()
         self.updateTextPos(moved=moved)
 
     def setIdentity(self, identity):

eddy/core/items/nodes/literal.py

@@ -691,6 +691,7 @@ def resize(self, mousePos):
         self.polygon.setGeometry(polygon)
 
         self.updateNode(selected=True, handle=self.mp_Handle, anchors=(self.mp_Data, D))
+        self.label.wrapLabel()
         self.updateTextPos(moved=moved)
 
     def setIdentity(self, identity):

eddy/core/items/nodes/role.py

@@ -571,6 +571,7 @@ def resize(self, mousePos):
         self.polygon.setGeometry(polygon)
 
         self.updateNode(selected=True, handle=self.mp_Handle, anchors=(self.mp_Data, D))
+        self.label.wrapLabel()
         self.updateTextPos(moved=moved)
 
     def setAsymmetric(self, asymmetric):