[processing] Draw arrows connected to selected/hovered components

slightly darker Makes it easier to track connections in a complex model
qgis · Mar 1, 2019 · dab4a04 · dab4a04
1 parent 2178e1a
commit dab4a04
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Showing 2 changed files with 21 additions and 3 deletions.
diff --git a/python/plugins/processing/modeler/ModelerArrowItem.py b/python/plugins/processing/modeler/ModelerArrowItem.py
@@ -68,6 +68,7 @@ def __init__(self, startItem, startIndex, endItem, endIndex,
         self.endPoints = []
         self.setFlag(QGraphicsItem.ItemIsSelectable, False)
         self.myColor = QApplication.palette().color(QPalette.WindowText)
+        self.myColor.setAlpha(150)
         self.setPen(QPen(self.myColor, 1, Qt.SolidLine,
                          Qt.RoundCap, Qt.RoundJoin))
         self.setZValue(0)
@@ -125,10 +126,19 @@ def updatePath(self):
         self.setPath(path)
 
     def paint(self, painter, option, widget=None):
+        color = self.myColor
+
+        if self.startItem.isSelected() or self.endItem.isSelected():
+            color.setAlpha(220)
+        elif self.startItem.hover_over_item or self.endItem.hover_over_item:
+            color.setAlpha(150)
+        else:
+            color.setAlpha(80)
+
         myPen = self.pen()
-        myPen.setColor(self.myColor)
+        myPen.setColor(color)
         painter.setPen(myPen)
-        painter.setBrush(self.myColor)
+        painter.setBrush(color)
         painter.setRenderHint(QPainter.Antialiasing)
 
         for point in self.endPoints:

diff --git a/python/plugins/processing/modeler/ModelerGraphicItem.py b/python/plugins/processing/modeler/ModelerGraphicItem.py
@@ -188,6 +188,7 @@ def hoverLeaveEvent(self, event):
         if self.hover_over_item:
             self.hover_over_item = False
             self.update()
+            self.repaintArrows()
 
     def updateToolTip(self, event):
         prev_status = self.hover_over_item
@@ -199,6 +200,7 @@ def updateToolTip(self, event):
             self.hover_over_item = False
         if self.hover_over_item != prev_status:
             self.update()
+            self.repaintArrows()
 
     def contextMenuEvent(self, event):
         if isinstance(self.element, QgsProcessingModelOutput):
@@ -427,6 +429,10 @@ def getLinkPointForOutput(self, outputIndex):
         else:
             return QPointF(0, 0)
 
+    def repaintArrows(self):
+        for arrow in self.arrows:
+            arrow.update()
+
     def itemChange(self, change, value):
         if change == QGraphicsItem.ItemPositionHasChanged:
             for arrow in self.arrows:
@@ -440,8 +446,10 @@ def itemChange(self, change, value):
                 self.model.parameterComponent(self.element.parameterName()).setPosition(self.pos())
             elif isinstance(self.element, QgsProcessingModelOutput):
                 self.model.childAlgorithm(self.element.childId()).modelOutput(self.element.name()).setPosition(self.pos())
+        elif change == QGraphicsItem.ItemSelectedChange:
+            self.repaintArrows()
 
-        return value
+        return super().itemChange(change, value)
 
     def polygon(self):
         font = QFont('Verdana', 8)