From 05fc5aab32214ee96caf32a9cdb9f01d360656ae Mon Sep 17 00:00:00 2001
From: Florian Festi <florian@festi.info>
Date: Sat, 30 Jul 2022 23:37:54 +0200
Subject: [PATCH] New Generator: CardHolder

Resolves: #279
---
 boxes/__init__.py              |   7 ++-
 boxes/generators/cardholder.py | 112 +++++++++++++++++++++++++++++++++
 2 files changed, 117 insertions(+), 2 deletions(-)
 create mode 100644 boxes/generators/cardholder.py

diff --git a/boxes/__init__.py b/boxes/__init__.py
index 97003ab..1d26b60 100755
--- a/boxes/__init__.py
+++ b/boxes/__init__.py
@@ -2469,8 +2469,11 @@ class Boxes:
         r = min(r, x, y)
         a = math.atan2(y-r, float(x-r))
         alpha = math.degrees(a)
-
-        width = x + (edges[-1].spacing()+self.spacing)/math.sin(a) + edges[1].spacing() + self.spacing
+        print(a, alpha)
+        if a > 0:
+            width = x + (edges[-1].spacing()+self.spacing)/math.sin(a) + edges[1].spacing() + self.spacing
+        else:
+            width = x + (edges[-1].spacing()+self.spacing) + edges[1].spacing() + self.spacing
         height = y + edges[0].spacing() + edges[2].spacing() * math.cos(a) + 2* self.spacing + self.spacing
         if num > 1:
             width = 2*width - x + r - self.spacing
diff --git a/boxes/generators/cardholder.py b/boxes/generators/cardholder.py
new file mode 100644
index 0000000..1fa6caf
--- /dev/null
+++ b/boxes/generators/cardholder.py
@@ -0,0 +1,112 @@
+#!/usr/bin/env python3
+# Copyright (C) 2013-2021 Florian Festi
+#
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from boxes import *
+
+
+class CardHolder(Boxes):
+    """Shelf for holding (multiple) piles of playing cards / notes"""
+
+    ui_group = "Shelf"
+
+    def __init__(self):
+        Boxes.__init__(self)
+
+        self.addSettingsArgs(edges.GroovedSettings)
+        self.addSettingsArgs(edges.FingerJointSettings, surroundingspaces=1.0)
+
+        self.buildArgParser(sx="68*3", y=100, h=40, outside=False)
+        self.argparser.add_argument(
+            "--angle", action="store", type=float, default=7.5,
+            help="backward angle of floor")
+        self.argparser.add_argument(
+            "--stackable", action="store", type=boolarg, default=True,
+            help="make holders stackable")
+
+    def side(self):
+        t = self.thickness
+        a = math.radians(self.angle)
+
+        pos_y = self.y - abs(0.5 * t * math.sin(a))
+        pos_h = t - math.cos(a) * 0.5 * t
+        self.fingerHolesAt(pos_y, pos_h, self.y, 180-self.angle)
+
+    def fingerHoleCB(self, length, posy=0.0):
+        def CB():
+            t = self.thickness
+            px = -0.5 * t
+            for x in self.sx[:-1]:
+                px += x + t
+                self.fingerHolesAt(px, posy, length, 90)
+        return CB
+
+    def middleWall(self, move=None):
+        y, h = self.y , self.h
+        a = self.angle
+        t = self.thickness
+        tw = y + t
+        th = h
+
+        if self.move(tw, th, move, True):
+            return
+
+        self.moveTo(t, t, a)
+
+        self.edges["f"](y)
+        self.polyline(0, 90-a, h-t-y*math.sin(math.radians(a)), 90,
+                      y*math.cos(math.radians(a)), 90)
+        self.edges["f"](h-t)
+
+        self.move(tw, th, move)
+
+    def render(self):
+        sx, y = self.sx, self.y
+        t = self.thickness
+
+        bottom = "š" if self.stackable else "e"
+        top = "S" if self.stackable else "e"
+
+        if self.outside:
+            self.sx = sx = self.adjustSize(sx)
+            h = self.h = self.adjustSize(self.h, bottom, top)
+        else:
+            h = self.h = self.h + t + y * math.sin(math.radians(self.angle))
+        self.x = x = sum(sx) + t * (len(sx) - 1)
+
+        self.rectangularWall(y, h, [bottom, "F", top, "e"],
+                             ignore_widths=[1, 6],
+                             callback=[self.side], move="up")
+        self.rectangularWall(y, h, [bottom, "F", top, "e"],
+                             ignore_widths=[1, 6],
+                             callback=[self.side], move="up mirror")
+
+        nx = len(sx)
+        f_lengths = []
+        for val in self.sx:
+            f_lengths.append(val)
+            f_lengths.append(t)
+        f_lengths = f_lengths[:-1]
+
+        frontedge = edges.CompoundEdge(
+            self, "e".join("z" * nx), f_lengths)
+
+        self.rectangularWall(x, y, [frontedge, "f", "e", "f"],
+                             callback=[self.fingerHoleCB(y)], move="up")
+        self.rectangularWall(x, h, bottom + "f"  + top + "f",
+                             ignore_widths=[1, 6],
+                             callback=[self.fingerHoleCB(h-t, t)], move="up")
+        for i in range(nx-1):
+            self.middleWall(move="right")