Add scheduler GUI

b_asic/scheduler-gui/graphics_axes_item.py

@@ -2,7 +2,8 @@
 # -*- coding: utf-8 -*-
 """B-ASIC Scheduler-gui Graphics Axes Item Module.
 
-Contains the scheduler-gui GraphicsAxesItem class for drawing and maintain the axes in a graph.
+Contains the scheduler-gui GraphicsAxesItem class for drawing and maintain the
+axes in a graph.
 """
 from typing     import Union, Optional, List
 from math       import sin, pi
@@ -44,10 +45,15 @@ class GraphicsAxesItem(QGraphicsItemGroup):
 
 
     def __init__(self, width: int, height: int,
-                 width_indent: Optional[float]  = 0.2, height_indent: Optional[float] = 0.2,
-                 width_padding: Optional[float] = 0.6, height_padding: Optional[float] = 0.5,
+                 width_indent: Optional[float]  = 0.2,
+                 height_indent: Optional[float] = 0.2,
+                 width_padding: Optional[float] = 0.6,
+                 height_padding: Optional[float] = 0.5,
                  parent: Optional[QGraphicsItem] = None):
-        """Constructs a GraphicsAxesItem. 'parent' is passed to QGraphicsItemGroup's constructor."""
+        """
+        Constructs a GraphicsAxesItem.
+        *parent* is passed to QGraphicsItemGroup's constructor.
+        """
         super().__init__(parent=parent)
         assert width >= 0, f"'width' greater or equal to 0 expected, got: {width}."
         assert height >= 0, f"'height' greater or equal to 0 expected, got: {height}."
@@ -198,19 +204,23 @@ class GraphicsAxesItem(QGraphicsItemGroup):
         self._x_scale_labels.insert(index, QGraphicsSimpleTextItem(str(index)))
         self._x_scale_labels[index].setScale(1 / self._scale)
         x_pos = self._width_indent + index
-        x_pos -= self.mapRectFromItem(self._x_scale_labels[index], self._x_scale_labels[index].boundingRect()).width()/2
+        x_pos -= self.mapRectFromItem(
+            self._x_scale_labels[index],
+            self._x_scale_labels[index].boundingRect()).width()/2
         pos = self.mapToScene(QPointF(x_pos, self._x_label_offset))
         self._x_scale_labels[index].setPos(pos)
         self.addToGroup(self._x_scale_labels[index])
 
+        self._x_ledger.insert(
+            index, GraphicsTimelineItem(0, 0, 0, -(self._height_indent +
+                                                   self._height +
+                                                   self._height_padding)))
         # x-axis vertical ledger
-        if is_timeline:                                       # last line is a timeline
-            self._x_ledger.insert(index, GraphicsTimelineItem(0, 0, 0, -(self._height_indent + self._height + self._height_padding)))
+        if is_timeline:  # last line is a timeline
             self._x_ledger[index].setPen(self._timeline_pen)
             self._x_ledger[index].set_text_scale(1.05/self._scale)
             self._register_event_item(self._x_ledger[index])
         else:
-            self._x_ledger.insert(index, QGraphicsLineItem(0, 0, 0, -(self._height_indent + self._height + self._height_padding)))
             self._x_ledger[index].setPen(self._ledger_pen)
         pos = self.mapToScene(QPointF(self._width_indent + index, 0))
         self._x_ledger[index].setPos(pos)
@@ -238,10 +248,10 @@ class GraphicsAxesItem(QGraphicsItemGroup):
 
         # x-axis arrow
         arrow_size = 8/self._scale
-        p0 = QPointF(0, sin(pi/6) * arrow_size)
-        p1 = QPointF(arrow_size, 0)
-        p2 = QPointF(0, -sin(pi/6) * arrow_size)
-        polygon = QPolygonF([p0, p1, p2])
+        point_0 = QPointF(0, sin(pi/6) * arrow_size)
+        point_1 = QPointF(arrow_size, 0)
+        point_2 = QPointF(0, -sin(pi/6) * arrow_size)
+        polygon = QPolygonF([point_0, point_1, point_2])
         self._x_arrow.setPolygon(polygon)
         self._x_arrow.setPen(self._base_pen)
         self._x_arrow.setBrush(QBrush(Qt.SolidPattern))
@@ -251,9 +261,11 @@ class GraphicsAxesItem(QGraphicsItemGroup):
         # x-axis label
         self._x_label.setText('time')
         self._x_label.setScale(1 / self._scale)
-        x_pos = self._width_indent + 0 + self._width_padding                                    # end of x-axis
-        x_pos += self.mapRectFromItem(self._x_arrow, self._x_arrow.boundingRect()).width()/2    # + half arrow width
-        x_pos -= self.mapRectFromItem(self._x_label, self._x_label.boundingRect()).width()/2    # - center of label
+        x_pos = self._width_indent + 0 + self._width_padding  # end of x-axis
+        x_pos += self.mapRectFromItem(self._x_arrow,
+                                      self._x_arrow.boundingRect()).width()/2  # + half arrow width
+        x_pos -= self.mapRectFromItem(self._x_label,
+                                      self._x_label.boundingRect()).width()/2  # - center of label
         self._x_label.setPos(x_pos, self._x_label_offset)
         self.addToGroup(self._x_label)
 
@@ -265,6 +277,8 @@ class GraphicsAxesItem(QGraphicsItemGroup):
         self._x_ledger[-1].setPos(pos + QPoint(self._width, 0))     # move timeline
 
         # y-axis
-        self._y_axis.setLine(0, 0, 0, -(self._height_indent + self._height + self._height_padding + 0.05))
+        self._y_axis.setLine(0, 0, 0,
+                             -(self._height_indent + self._height +
+                               self._height_padding + 0.05))
         self._y_axis.setPen(self._base_pen)
         self.addToGroup(self._y_axis)