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window.py
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window.py
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from PySide import QtCore, QtGui
from PySide.QtCore import Qt
from window_ui import Ui_MainWindow
import geo
import geoutil.huzita_justin
import geoutil.line
import paper
SELECTION_THRESHOLD = 10
MARGIN = 10
ZOOM_INCREMENT = 1.25
EDGE_COLOR = QtGui.QColor(0, 0, 0)
PAPER_COLORS = [QtGui.QColor(0xFF, 0xFF, 0xFF), QtGui.QColor(0xFF, 0xFF, 0x80)]
LINE_COLOR = QtGui.QColor(0x80, 0x80, 0x80)
SELECTED_LINE_COLORS = [QtGui.QColor(0xFF, 0x80, 0x00), QtGui.QColor(0x80, 0x40, 0x00)]
SELECTED_POINT_COLORS = [QtGui.QColor(0x00, 0xFF, 0x80), QtGui.QColor(0x00, 0x80, 0x40)]
HIGHLIGHT_COLOR = QtGui.QColor(0, 0, 0)
FOLD_COLOR = QtGui.QColor(0x00, 0x00, 0xFF)
FOLD_WIDTH = 3
LINE_WIDTH = 2
LINE_WIDTH_SELECTED = 3
POINT_SIZE = 3
class Window(QtGui.QMainWindow):
def __init__(self, parent=None):
super(Window, self).__init__(parent)
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.ui.canvas.paintEvent = self.on_canvas_paint_event
self.ui.canvas.mouseReleaseEvent = self.on_canvas_mouse_release_event
self.ui.canvas.mouseMoveEvent = self.on_canvas_mouse_move_event
self.ui.scrollArea.resizeEvent = self.on_scroll_area_resize_event
self.ui.actionZoomIn.triggered.connect(self.on_action_zoom_in)
self.ui.actionZoomOut.triggered.connect(self.on_action_zoom_out)
self.ui.actionPoints.triggered.connect(self.on_action_points)
self.ui.actionPointPoint.triggered.connect(self.on_action_point_point)
self.ui.actionLineLine.triggered.connect(self.on_action_line_line)
self.ui.actionLinePoint.triggered.connect(self.on_action_line_point)
self.ui.actionPointPointLine.triggered.connect(self.on_action_point_point_line)
self.ui.actionLinePointLine.triggered.connect(self.on_action_line_point_line)
self.ui.actionValleyFold.triggered.connect(self.on_action_valley_fold)
self.ui.actionExecuteFold.triggered.connect(self.on_action_execute_fold)
self.ui.canvas.setMouseTracking(True)
self.zoom = 1
points = [geo.Point(0, 0), geo.Point(0, 1), geo.Point(1, 1), geo.Point(1, 0)]
polygon = geo.Polygon(points)
self.sheet = paper.Sheet(polygon)
self.highlight = None
self.selected = []
self.lines = []
self.intersections = []
self.fold = None
self.update_actions()
def canvas_size(self):
return min(self.ui.scrollArea.width(), self.ui.scrollArea.height()) * self.zoom
def point_to_window(self, point):
size = self.canvas_size()
return QtCore.QPoint(MARGIN + point.x * (size - 2 * MARGIN), MARGIN + point.y * (size - 2 * MARGIN))
def window_to_point(self, point):
size = self.canvas_size()
return geo.Point((point.x() - MARGIN) / (size - 2 * MARGIN), (point.y() - MARGIN) / (size - 2 * MARGIN))
def selection_threshold(self):
return SELECTION_THRESHOLD / self.canvas_size()
def find_point_near(self, mouse_point):
threshold = self.selection_threshold()
for point in self.sheet.points:
distance2 = (mouse_point - point).magnitude2()
if distance2 <= threshold * threshold:
return point
for point in self.intersections:
distance2 = (mouse_point - point).magnitude2()
if distance2 <= threshold * threshold:
return point
return None
def find_line_near(self, mouse_point):
found_line = None
threshold = self.selection_threshold()
for segment in self.sheet.segments:
line = geoutil.line.from_segment(segment)
if geoutil.line.distance_to_point(line, mouse_point) <= threshold and geoutil.segment.is_point_within(segment, mouse_point):
found_line = line
break
if not found_line:
for line in self.lines:
if geoutil.line.distance_to_point(line, mouse_point) <= threshold:
found_line = line
break
return found_line
def on_canvas_paint_event(self, event):
painter = QtGui.QPainter(self.ui.canvas)
painter.setRenderHint(QtGui.QPainter.Antialiasing)
def draw_segment(segment):
draw_points = [self.point_to_window(point) for point in segment.points()]
painter.drawLine(*draw_points)
def draw_point(point):
painter.drawEllipse(self.point_to_window(point), POINT_SIZE, POINT_SIZE)
def draw_line(line):
min = self.window_to_point(QtCore.QPoint(0, 0))
max = self.window_to_point(QtCore.QPoint(self.ui.canvas.width(), self.ui.canvas.height()))
if abs(line.normal.x) > abs(line.normal.y):
minline = geoutil.line.from_point_normal(min, geo.Vector(0, 1))
maxline = geoutil.line.from_point_normal(max, geo.Vector(0, -1))
else:
minline = geoutil.line.from_point_normal(min, geo.Vector(1, 0))
maxline = geoutil.line.from_point_normal(max, geo.Vector(-1, 0))
minpoint = geoutil.line.intersect(line, minline)
maxpoint = geoutil.line.intersect(line, maxline)
points = [minpoint, maxpoint]
draw_points = [self.point_to_window(point) for point in points]
painter.drawLine(*draw_points)
def draw_polygon(polygon):
draw_points = [self.point_to_window(point) for point in polygon.points]
painter.drawPolygon(draw_points)
pen = QtGui.QPen(EDGE_COLOR, LINE_WIDTH, Qt.SolidLine, Qt.SquareCap, Qt.MiterJoin)
painter.setPen(pen)
for layer in self.sheet.layers:
for facet in layer.facets:
brush = QtGui.QBrush(PAPER_COLORS[facet.parity])
painter.setBrush(brush)
draw_polygon(facet.polygon)
highlight = self.highlight
if highlight:
if highlight in self.selected or self.num_selected(type(highlight)) == 2:
highlight = None
pen = QtGui.QPen(LINE_COLOR, LINE_WIDTH, Qt.SolidLine, Qt.SquareCap, Qt.MiterJoin)
painter.setPen(pen)
for line in self.lines:
draw_line(line)
pen = QtGui.QPen(FOLD_COLOR, FOLD_WIDTH, Qt.DashLine, Qt.SquareCap, Qt.MiterJoin)
painter.setPen(pen)
if self.fold:
draw_line(self.fold)
line = geoutil.line.perpendicular(self.fold, geo.Point(0.5, 0.5))
point = self.point_to_window(geoutil.line.intersect(line, self.fold))
vec = QtCore.QPoint(self.fold.normal.x * 20, self.fold.normal.y * 20)
p = geoutil.vector.perpendicular(self.fold.normal)
perp_vec = QtCore.QPoint(p.x * 5, p.y * 5)
norm_vec = QtCore.QPoint(self.fold.normal.x * 5, self.fold.normal.y * 5)
pen = QtGui.QPen(QtGui.QColor(0, 0, 0), 2, Qt.SolidLine, Qt.SquareCap, Qt.MiterJoin)
painter.setPen(pen)
painter.drawLine(point - vec, point + vec)
painter.drawLine(point + vec, point + vec - norm_vec - perp_vec)
painter.drawLine(point + vec, point + vec - norm_vec + perp_vec)
idx = 0
for selected in self.selected:
if not isinstance(selected, geo.Line):
continue
pen = QtGui.QPen(SELECTED_LINE_COLORS[idx], LINE_WIDTH_SELECTED, Qt.SolidLine, Qt.SquareCap, Qt.MiterJoin)
painter.setPen(pen)
draw_line(selected)
idx += 1
idx = 0
painter.setPen(Qt.NoPen)
for selected in self.selected:
if not isinstance(selected, geo.Point):
continue
brush = QtGui.QBrush(SELECTED_POINT_COLORS[idx])
painter.setBrush(brush)
draw_point(selected)
idx += 1
if highlight:
if isinstance(highlight, geo.Line):
pen = QtGui.QPen(HIGHLIGHT_COLOR, LINE_WIDTH_SELECTED, Qt.SolidLine, Qt.SquareCap, Qt.MiterJoin)
painter.setPen(pen)
draw_line(highlight)
elif isinstance(highlight, geo.Point):
brush = QtGui.QBrush(HIGHLIGHT_COLOR)
painter.setBrush(brush)
painter.setPen(Qt.NoPen)
draw_point(highlight)
def num_selected(self, type):
count = 0
for selected in self.selected:
if isinstance(selected, type):
count += 1
return count
def on_canvas_mouse_release_event(self, event):
mouse_point = self.window_to_point(event.pos())
found = False
if self.fold:
line = geoutil.line.perpendicular(self.fold, geo.Point(0.5, 0.5))
point = geoutil.line.intersect(line, self.fold)
threshold = self.selection_threshold()
if (mouse_point - point).magnitude2() < threshold * threshold:
self.fold = geo.Line(-self.fold.normal, -self.fold.offset)
found = True
if not found:
if self.highlight:
if self.highlight in self.selected:
self.selected.remove(self.highlight)
else:
if self.num_selected(type(self.highlight)) < 2:
self.selected.append(self.highlight)
self.highlight = None
else:
self.selected.clear()
self.ui.canvas.update()
self.update_actions()
def on_canvas_mouse_move_event(self, event):
mouse_point = self.window_to_point(event.pos())
highlight = self.find_point_near(mouse_point)
if not highlight:
highlight = self.find_line_near(mouse_point)
if highlight != self.highlight:
self.highlight = highlight
self.ui.canvas.update()
def on_scroll_area_resize_event(self, event):
self.resize_canvas()
def resize_canvas(self):
size = self.canvas_size()
hmax = self.ui.scrollArea.horizontalScrollBar().maximum()
hvalue = self.ui.scrollArea.horizontalScrollBar().value()
vmax = self.ui.scrollArea.verticalScrollBar().maximum()
vvalue = self.ui.scrollArea.verticalScrollBar().value()
x = hvalue / hmax if hmax else 0.5
y = vvalue / vmax if vmax else 0.5
self.ui.canvas.setMinimumSize(QtCore.QSize(size, size))
self.ui.canvas.setMaximumSize(QtCore.QSize(size, size))
hmax = self.ui.scrollArea.horizontalScrollBar().maximum()
vmax = self.ui.scrollArea.verticalScrollBar().maximum()
self.ui.scrollArea.horizontalScrollBar().setValue(x * hmax)
self.ui.scrollArea.verticalScrollBar().setValue(y * vmax)
def update_actions(self):
self.ui.actionPoints.setEnabled(self.num_selected(geo.Point) == 2 and self.num_selected(geo.Line) == 0)
self.ui.actionPointPoint.setEnabled(self.num_selected(geo.Point) == 2 and self.num_selected(geo.Line) == 0)
self.ui.actionLineLine.setEnabled(self.num_selected(geo.Point) == 0 and self.num_selected(geo.Line) == 2)
self.ui.actionLinePoint.setEnabled(self.num_selected(geo.Point) == 1 and self.num_selected(geo.Line) == 1)
self.ui.actionPointPointLine.setEnabled(self.num_selected(geo.Point) == 2 and self.num_selected(geo.Line) == 1)
self.ui.actionLinePointLine.setEnabled(self.num_selected(geo.Point) == 1 and self.num_selected(geo.Line) == 2)
self.ui.actionValleyFold.setEnabled(self.num_selected(geo.Point) == 0 and self.num_selected(geo.Line) == 1 and not self.fold)
self.ui.actionExecuteFold.setEnabled(self.fold is not None)
def add_lines(self, lines):
for line in lines:
for segment in self.sheet.segments:
point = geoutil.segment.intersect_line(segment, line)
if point:
self.intersections.append(point)
for other_line in self.lines:
point = geoutil.line.intersect(line, other_line)
if point:
self.intersections.append(point)
self.lines.extend(lines)
self.update_actions()
self.ui.canvas.update()
def add_line(self, line):
self.add_lines([line])
def on_action_zoom_in(self):
self.zoom *= ZOOM_INCREMENT
self.resize_canvas()
def on_action_zoom_out(self):
self.zoom /= ZOOM_INCREMENT
self.resize_canvas()
def on_action_points(self):
line = geoutil.huzita_justin.O1(self.selected[0], self.selected[1])
self.selected.clear()
self.add_line(line)
def on_action_point_point(self):
line = geoutil.huzita_justin.O2(self.selected[0], self.selected[1])
self.selected.clear()
self.add_line(line)
def on_action_line_line(self):
lines = geoutil.huzita_justin.O3(self.selected[0], self.selected[1])
if lines:
self.selected.clear()
self.add_lines(lines)
def on_action_line_point(self):
for selected in self.selected:
if isinstance(selected, geo.Point):
point = selected
elif isinstance(selected, geo.Line):
line = selected
line = geoutil.huzita_justin.O4(point, line)
self.selected.clear()
self.add_line(line)
def on_action_point_point_line(self):
points = []
for selected in self.selected:
if isinstance(selected, geo.Point):
points.append(selected)
elif isinstance(selected, geo.Line):
line = selected
lines = geoutil.huzita_justin.O5(points[0], points[1], line)
if lines:
self.selected.clear()
self.add_lines(lines)
def on_action_line_point_line(self):
lines = []
for selected in self.selected:
if isinstance(selected, geo.Point):
point = selected
elif isinstance(selected, geo.Line):
lines.append(selected)
line = geoutil.huzita_justin.O7(point, lines[0], lines[1])
if line:
self.selected.clear()
self.add_line(line)
def on_action_valley_fold(self):
self.fold = self.selected[0]
self.lines = []
self.intersections = []
self.selected.clear()
self.highlighted = None
self.update_actions()
self.ui.canvas.update()
def on_action_execute_fold(self):
self.sheet.fold(self.fold)
self.fold = None
self.update_actions()
self.ui.canvas.update()