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import sys
import numpy
import wx
import colorsys
from itertools import izip
from .svg import PIXELS_PER_MM, color_block_to_point_lists
class EmbroiderySimulator(wx.Frame):
def __init__(self, *args, **kwargs):
stitch_plan = kwargs.pop('stitch_plan', None)
self.on_close_hook = kwargs.pop('on_close', None)
self.frame_period = kwargs.pop('frame_period', 80)
self.stitches_per_frame = kwargs.pop('stitches_per_frame', 1)
self.target_duration = kwargs.pop('target_duration', None)
self.margin = 10
screen_rect = wx.Display(0).ClientArea
self.max_width = kwargs.pop('max_width', screen_rect.GetWidth())
self.max_height = kwargs.pop('max_height', screen_rect.GetHeight())
self.scale = 1
wx.Frame.__init__(self, *args, **kwargs)
self.panel = wx.Panel(self, wx.ID_ANY)
self.panel.SetFocus()
self.load(stitch_plan)
if self.target_duration:
self.adjust_speed(self.target_duration)
self.buffer = wx.Bitmap(self.width * self.scale + self.margin * 2, self.height * self.scale + self.margin * 2)
self.dc = wx.MemoryDC()
self.dc.SelectObject(self.buffer)
self.canvas = wx.GraphicsContext.Create(self.dc)
self.clear()
self.Bind(wx.EVT_SIZE, self.on_size)
self.panel.Bind(wx.EVT_PAINT, self.on_paint)
self.panel.Bind(wx.EVT_KEY_DOWN, self.on_key_down)
self.timer = None
self.last_pos = None
self.Bind(wx.EVT_CLOSE, self.on_close)
def load(self, stitch_plan=None):
if stitch_plan:
self.mirror = False
self.segments = self._stitch_plan_to_segments(stitch_plan)
else:
return
self.trim_margins()
self.calculate_dimensions()
def adjust_speed(self, duration):
self.frame_period = 1000 * float(duration) / len(self.segments)
self.stitches_per_frame = 1
while self.frame_period < 1.0:
self.frame_period *= 2
self.stitches_per_frame *= 2
def on_key_down(self, event):
keycode = event.GetKeyCode()
if keycode == ord("+") or keycode == ord("=") or keycode == wx.WXK_UP:
if self.frame_period == 1:
self.stitches_per_frame *= 2
else:
self.frame_period = self.frame_period / 2
elif keycode == ord("-") or keycode == ord("_") or keycode == wx.WXK_DOWN:
if self.stitches_per_frame == 1:
self.frame_period *= 2
else:
self.stitches_per_frame /= 2
elif keycode == ord("Q"):
self.Close()
elif keycode == ord('P'):
if self.timer.IsRunning():
self.timer.Stop()
else:
self.timer.Start(self.frame_period)
elif keycode == ord("R"):
self.stop()
self.clear()
self.go()
self.frame_period = max(1, self.frame_period)
self.stitches_per_frame = max(self.stitches_per_frame, 1)
if self.timer.IsRunning():
self.timer.Stop()
self.timer.Start(self.frame_period)
def _strip_quotes(self, string):
if string.startswith('"') and string.endswith('"'):
string = string[1:-1]
return string
def color_to_pen(self, color):
return wx.Pen(color.visible_on_white.rgb)
def _stitch_plan_to_segments(self, stitch_plan):
segments = []
for color_block in stitch_plan:
pen = self.color_to_pen(color_block.color)
for point_list in color_block_to_point_lists(color_block):
# if there's only one point, there's nothing to do, so skip
if len(point_list) < 2:
continue
for start, end in izip(point_list[:-1], point_list[1:]):
segments.append(((start, end), pen))
return segments
def all_coordinates(self):
for segment in self.segments:
start, end = segment[0]
yield start
yield end
def trim_margins(self):
"""remove any unnecessary whitespace around the design"""
min_x = sys.maxint
min_y = sys.maxint
for x, y in self.all_coordinates():
min_x = min(min_x, x)
min_y = min(min_y, y)
new_segments = []
for segment in self.segments:
(start, end), color = segment
new_segment = (
(
(start[0] - min_x, start[1] - min_y),
(end[0] - min_x, end[1] - min_y),
),
color
)
new_segments.append(new_segment)
self.segments = new_segments
def calculate_dimensions(self):
# 0.01 avoids a division by zero below for designs with no width or
# height (e.g. a straight vertical or horizontal line)
width = 0.01
height = 0.01
for x, y in self.all_coordinates():
width = max(width, x)
height = max(height, y)
self.width = width
self.height = height
self.scale = min(float(self.max_width) / width, float(self.max_height) / height)
# make room for decorations and the margin
self.scale *= 0.95
def go(self):
self.clear()
self.current_stitch = 0
if not self.timer:
self.timer = wx.PyTimer(self.draw_one_frame)
self.timer.Start(self.frame_period)
def on_close(self, event):
self.stop()
if self.on_close_hook:
self.on_close_hook()
# If we keep a reference here, wx crashes when the process exits.
self.canvas = None
self.Destroy()
def stop(self):
if self.timer:
self.timer.Stop()
def clear(self):
self.dc.SetBackground(wx.Brush('white'))
self.dc.Clear()
self.last_pos = None
self.Refresh()
def on_size(self, e):
# ensure that the whole canvas is visible
window_width, window_height = self.GetSize()
client_width, client_height = self.GetClientSize()
decorations_width = window_width - client_width
decorations_height = window_height - client_height
self.SetSize((self.width * self.scale + decorations_width + self.margin * 2,
self.height * self.scale + decorations_height + self.margin * 2))
e.Skip()
def on_paint(self, e):
dc = wx.PaintDC(self.panel)
dc.Blit(0, 0, self.buffer.GetWidth(), self.buffer.GetHeight(), self.dc, 0, 0)
if self.last_pos:
dc.DrawLine(self.last_pos[0] - 10, self.last_pos[1], self.last_pos[0] + 10, self.last_pos[1])
dc.DrawLine(self.last_pos[0], self.last_pos[1] - 10, self.last_pos[0], self.last_pos[1] + 10)
def draw_one_frame(self):
for i in xrange(self.stitches_per_frame):
try:
((x1, y1), (x2, y2)), color = self.segments[self.current_stitch]
if self.mirror:
y1 = self.height - y1
y2 = self.height - y2
x1 = x1 * self.scale + self.margin
y1 = y1 * self.scale + self.margin
x2 = x2 * self.scale + self.margin
y2 = y2 * self.scale + self.margin
self.canvas.SetPen(color)
self.canvas.DrawLines(((x1, y1), (x2, y2)))
self.Refresh()
self.current_stitch += 1
self.last_pos = (x2, y2)
except IndexError:
self.timer.Stop()
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