PW-567 add the old canvas formula

2016-10-31 17:57:11 +01:00
parent cbee61b564
commit bf9fc3ae5a
10 changed files with 352 additions and 35 deletions
@@ -0,0 +1,52 @@
+# coding=UTF-8
+
+CANVAS = {
+    'max_long_side': 500,
+    'min_long_side': 20,
+    'max_short_side': 150,
+    'min_short_side': 20
+}
+
+CANVAS_FRAME = {
+    'max_long_side': 150,
+    'min_long_side': 40,
+    'max_short_side': 150,
+    'min_short_side': 40,
+}
+
+
+def calculate_canvas_frame_limits(width, height):
+    if width > height:
+        width = min(width, CANVAS_FRAME.get('max_long_side'))
+        width = max(width, CANVAS_FRAME.get('min_long_side'))
+        height = min(height, CANVAS_FRAME.get('max_short_side'))
+        height = max(height, CANVAS_FRAME.get('min_short_side'))
+    else:
+        height = min(height, CANVAS_FRAME.get('max_long_side'))
+        height = max(height, CANVAS_FRAME.get('min_long_side'))
+        width = min(width, CANVAS_FRAME.get('max_short_side'))
+        width = max(width, CANVAS_FRAME.get('min_short_side'))
+
+    # round to nearest 10
+    width = round(width, -1)
+    height = round(height, -1)
+
+    return width, height
+
+
+def calculate_canvas_limits(width, height, framed=False):
+    if framed:
+        return calculate_canvas_frame_limits(width, height)
+
+    if width > height:
+        width = min(width, CANVAS.get('max_long_side'))
+        width = max(width, CANVAS.get('min_long_side'))
+        height = min(height, CANVAS.get('max_short_side'))
+        height = max(height, CANVAS.get('min_short_side'))
+    else:
+        height = min(height, CANVAS.get('max_long_side'))
+        height = max(height, CANVAS.get('min_long_side'))
+        width = min(width, CANVAS.get('max_short_side'))
+        width = max(width, CANVAS.get('min_short_side'))
+
+    return width, height