flatcam/flatcamGUI/PlotCanvas.py

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# ########################################################## ##
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# FlatCAM: 2D Post-processing for Manufacturing #
# http://caram.cl/software/flatcam #
# Author: Juan Pablo Caram (c) #
# Date: 2/5/2014 #
# MIT Licence #
# ########################################################## ##
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from PyQt5 import QtCore
import logging
from flatcamGUI.VisPyCanvas import VisPyCanvas, time
from flatcamGUI.VisPyVisuals import ShapeGroup, ShapeCollection, TextCollection, TextGroup, Cursor
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from vispy.scene.visuals import InfiniteLine, Line
import numpy as np
from vispy.geometry import Rect
log = logging.getLogger('base')
class PlotCanvas(QtCore.QObject):
"""
Class handling the plotting area in the application.
"""
def __init__(self, container, app):
"""
The constructor configures the VisPy figure that
will contain all plots, creates the base axes and connects
events to the plotting area.
:param container: The parent container in which to draw plots.
:rtype: PlotCanvas
"""
super(PlotCanvas, self).__init__()
self.app = app
# Parent container
self.container = container
# workspace lines; I didn't use the rectangle because I didn't want to add another VisPy Node,
# which might decrease performance
self.b_line, self.r_line, self.t_line, self.l_line = None, None, None, None
# Attach to parent
self.vispy_canvas = VisPyCanvas()
self.vispy_canvas.create_native()
self.vispy_canvas.native.setParent(self.app.ui)
self.container.addWidget(self.vispy_canvas.native)
# ## AXIS # ##
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self.v_line = InfiniteLine(pos=0, color=(0.70, 0.3, 0.3, 1.0), vertical=True,
parent=self.vispy_canvas.view.scene)
self.h_line = InfiniteLine(pos=0, color=(0.70, 0.3, 0.3, 1.0), vertical=False,
parent=self.vispy_canvas.view.scene)
# draw a rectangle made out of 4 lines on the canvas to serve as a hint for the work area
# all CNC have a limited workspace
self.draw_workspace()
# if self.app.defaults['global_workspace'] is True:
# if self.app.ui.general_defaults_form.general_app_group.units_radio.get_value().upper() == 'MM':
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# self.wkspace_t = Line(pos=)
self.shape_collections = []
self.shape_collection = self.new_shape_collection()
self.app.pool_recreated.connect(self.on_pool_recreated)
self.text_collection = self.new_text_collection()
# TODO: Should be setting to show/hide CNC job annotations (global or per object)
self.text_collection.enabled = True
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# draw a rectangle made out of 4 lines on the canvas to serve as a hint for the work area
# all CNC have a limited workspace
def draw_workspace(self):
a = np.empty((0, 0))
a4p_in = np.array([(0, 0), (8.3, 0), (8.3, 11.7), (0, 11.7)])
a4l_in = np.array([(0, 0), (11.7, 0), (11.7, 8.3), (0, 8.3)])
a3p_in = np.array([(0, 0), (11.7, 0), (11.7, 16.5), (0, 16.5)])
a3l_in = np.array([(0, 0), (16.5, 0), (16.5, 11.7), (0, 11.7)])
a4p_mm = np.array([(0, 0), (210, 0), (210, 297), (0, 297)])
a4l_mm = np.array([(0, 0), (297, 0), (297,210), (0, 210)])
a3p_mm = np.array([(0, 0), (297, 0), (297, 420), (0, 420)])
a3l_mm = np.array([(0, 0), (420, 0), (420, 297), (0, 297)])
if self.app.ui.general_defaults_form.general_app_group.units_radio.get_value().upper() == 'MM':
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if self.app.defaults['global_workspaceT'] == 'A4P':
a = a4p_mm
elif self.app.defaults['global_workspaceT'] == 'A4L':
a = a4l_mm
elif self.app.defaults['global_workspaceT'] == 'A3P':
a = a3p_mm
elif self.app.defaults['global_workspaceT'] == 'A3L':
a = a3l_mm
else:
if self.app.defaults['global_workspaceT'] == 'A4P':
a = a4p_in
elif self.app.defaults['global_workspaceT'] == 'A4L':
a = a4l_in
elif self.app.defaults['global_workspaceT'] == 'A3P':
a = a3p_in
elif self.app.defaults['global_workspaceT'] == 'A3L':
a = a3l_in
self.delete_workspace()
self.b_line = Line(pos=a[0:2], color=(0.70, 0.3, 0.3, 1.0),
antialias= True, method='agg', parent=self.vispy_canvas.view.scene)
self.r_line = Line(pos=a[1:3], color=(0.70, 0.3, 0.3, 1.0),
antialias= True, method='agg', parent=self.vispy_canvas.view.scene)
self.t_line = Line(pos=a[2:4], color=(0.70, 0.3, 0.3, 1.0),
antialias= True, method='agg', parent=self.vispy_canvas.view.scene)
self.l_line = Line(pos=np.array((a[0], a[3])), color=(0.70, 0.3, 0.3, 1.0),
antialias= True, method='agg', parent=self.vispy_canvas.view.scene)
if self.app.defaults['global_workspace'] is False:
self.delete_workspace()
# delete the workspace lines from the plot by removing the parent
def delete_workspace(self):
try:
self.b_line.parent = None
self.r_line.parent = None
self.t_line.parent = None
self.l_line.parent = None
except Exception as e:
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pass
# redraw the workspace lines on the plot by readding them to the parent view.scene
def restore_workspace(self):
try:
self.b_line.parent = self.vispy_canvas.view.scene
self.r_line.parent = self.vispy_canvas.view.scene
self.t_line.parent = self.vispy_canvas.view.scene
self.l_line.parent = self.vispy_canvas.view.scene
except Exception as e:
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pass
def vis_connect(self, event_name, callback):
return getattr(self.vispy_canvas.events, event_name).connect(callback)
def vis_disconnect(self, event_name, callback=None):
if callback is None:
getattr(self.vispy_canvas.events, event_name).disconnect()
else:
getattr(self.vispy_canvas.events, event_name).disconnect(callback)
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def zoom(self, factor, center=None):
"""
Zooms the plot by factor around a given
center point. Takes care of re-drawing.
:param factor: Number by which to scale the plot.
:type factor: float
:param center: Coordinates [x, y] of the point around which to scale the plot.
:type center: list
:return: None
"""
self.vispy_canvas.view.camera.zoom(factor, center)
def new_shape_group(self, shape_collection=None):
if shape_collection:
return ShapeGroup(shape_collection)
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return ShapeGroup(self.shape_collection)
def new_shape_collection(self, **kwargs):
# sc = ShapeCollection(parent=self.vispy_canvas.view.scene, pool=self.app.pool, **kwargs)
# self.shape_collections.append(sc)
# return sc
return ShapeCollection(parent=self.vispy_canvas.view.scene, pool=self.app.pool, **kwargs)
def new_cursor(self):
c = Cursor(pos=np.empty((0, 2)), parent=self.vispy_canvas.view.scene)
c.antialias = 0
return c
def new_text_group(self):
return TextGroup(self.text_collection)
def new_text_collection(self, **kwargs):
return TextCollection(parent=self.vispy_canvas.view.scene, **kwargs)
def fit_view(self, rect=None):
# Lock updates in other threads
self.shape_collection.lock_updates()
if not rect:
rect = Rect(-1, -1, 20, 20)
try:
rect.left, rect.right = self.shape_collection.bounds(axis=0)
rect.bottom, rect.top = self.shape_collection.bounds(axis=1)
except TypeError:
pass
# adjust the view camera to be slightly bigger than the bounds so the shape colleaction can be seen clearly
# otherwise the shape collection boundary will have no border
rect.left *= 0.96
rect.bottom *= 0.96
rect.right *= 1.01
rect.top *= 1.01
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self.vispy_canvas.view.camera.rect = rect
self.shape_collection.unlock_updates()
def fit_center(self, loc, rect=None):
# Lock updates in other threads
self.shape_collection.lock_updates()
if not rect:
try:
rect = Rect(loc[0]-20, loc[1]-20, 40, 40)
except TypeError:
pass
self.vispy_canvas.view.camera.rect = rect
self.shape_collection.unlock_updates()
def clear(self):
pass
def redraw(self):
self.shape_collection.redraw([])
self.text_collection.redraw()
def on_pool_recreated(self, pool):
self.shape_collection.pool = pool