Add "Spines" and "PointsGrid" classes

simpleplots/visuals.py

@@ -0,0 +1,79 @@
+# -*- coding: utf-8 -*-
+
+"""
+simpleplots.visuals
+~~~~~~~~~~~~~~~~~~~
+
+"""
+
+from .base import Coords
+
+#-------------------------------------------------------------------------------
+
+class Spines(object):
+
+    def __init__(self, img_width, img_height, theme):
+        self.img_width = img_width
+        self.img_height = img_height
+        self.theme = theme
+
+        self.width = self.img_width * self.theme.spine_box_width_perc
+        self.height = self.img_height * self.theme.spine_box_height_perc
+        self.horizontal_offset = (self.img_width - self.width) / 2
+        self.vertical_offset = (self.img_height - self.height) / 2
+
+    @property
+    def left(self):
+        return Coords(
+            self.horizontal_offset, self.vertical_offset,
+            self.horizontal_offset, self.vertical_offset + self.height
+        )
+
+    @property
+    def right(self):
+        return Coords(
+            self.horizontal_offset + self.width, self.vertical_offset,
+            self.horizontal_offset + self.width, self.vertical_offset + self.height
+        )
+
+    @property
+    def top(self):
+        return Coords(
+            self.horizontal_offset, self.vertical_offset,
+            self.horizontal_offset + self.width, self.vertical_offset
+        )
+
+    @property
+    def bottom(self):
+        return Coords(
+            self.horizontal_offset, self.vertical_offset + self.height,
+            self.horizontal_offset + self.width, self.vertical_offset + self.height
+        )
+
+    @property
+    def all(self):
+        return [
+            self.left,
+            self.top,
+            self.right,
+            self.bottom
+        ]
+
+#-------------------------------------------------------------------------------
+
+class PointsGrid(object):
+
+    def __init__(self, spines_width, spines_height, theme):
+        self.spines_width = spines_width
+        self.spines_height = spines_height
+        self.theme = theme
+
+        self.width = self.spines_width * self.theme.grid_box_width_perc
+        self.height = self.spines_height * self.theme.grid_box_height_perc
+        self.horizontal_offset = (self.spines_width - self.width) / 2
+        self.vertical_offset = (self.spines_height - self.height) / 2
+
+        self.x_lines_number = None
+        self.y_lines_number = None
+
+#-------------------------------------------------------------------------------