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draw in-progress lines to snap point

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This commit is contained in:
Josh Holtrop 2011-07-28 19:53:01 -04:00
parent 84f1e6585b
commit f489d11a57
1 changed files with 30 additions and 26 deletions
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56
SketchWidget.py
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@ -416,37 +416,41 @@ class SketchWidget:
self.queue_redraw()
def do_line_motion(self, x, y):
snap_ptref = self.get_closest_snap_ptref(x, y)
self.update_hover_snap_point(snap_ptref)
if self.drawingShape is not None:
this_pt = self.screenPtToPt((x, self.size[1] - y))
start = self.drawingShape.getPt(0)
angle = math.atan2(this_pt[1] - start[1], this_pt[0] - start[0])
angle *= 180.0 / math.pi
def within(a, b, d): return abs(a - b) < d
def snaps_to(q): return within(angle, q, self.snap_angle)
hv_snap_dist = self.screenDistToDist(self.hv_snap_dist)
if ((snaps_to(-180) or snaps_to(180) or snaps_to(0))
and within(start[1], this_pt[1], hv_snap_dist)):
this_pt = (this_pt[0], start[1])
if not ('hv' in self.drawingConstraints
and isinstance(self.drawingConstraints['hv'],
Horizontal)):
c = Horizontal(self.drawingShape, 0, self.drawingShape, 1)
self.drawingConstraints['hv'] = c
elif ((snaps_to(-90) or snaps_to(90))
and within(start[0], this_pt[0], hv_snap_dist)):
this_pt = (start[0], this_pt[1])
if not ('hv' in self.drawingConstraints
and isinstance(self.drawingConstraints['hv'],
Vertical)):
c = Vertical(self.drawingShape, 0, self.drawingShape, 1)
self.drawingConstraints['hv'] = c
if snap_ptref is not None:
this_pt = snap_ptref.getPt()
self.drawingConstraints['hv'] = None
else:
if 'hv' in self.drawingConstraints:
del self.drawingConstraints['hv']
start = self.drawingShape.getPt(0)
angle = math.atan2(this_pt[1] - start[1], this_pt[0] - start[0])
angle *= 180.0 / math.pi
def within(a, b, d): return abs(a - b) < d
def snaps_to(q): return within(angle, q, self.snap_angle)
hv_snap_dist = self.screenDistToDist(self.hv_snap_dist)
if ((snaps_to(-180) or snaps_to(180) or snaps_to(0))
and within(start[1], this_pt[1], hv_snap_dist)):
this_pt = (this_pt[0], start[1])
if not ('hv' in self.drawingConstraints
and isinstance(self.drawingConstraints['hv'],
Horizontal)):
c = Horizontal(
self.drawingShape, 0, self.drawingShape, 1)
self.drawingConstraints['hv'] = c
elif ((snaps_to(-90) or snaps_to(90))
and within(start[0], this_pt[0], hv_snap_dist)):
this_pt = (start[0], this_pt[1])
if not ('hv' in self.drawingConstraints
and isinstance(self.drawingConstraints['hv'],
Vertical)):
c = Vertical(self.drawingShape, 0, self.drawingShape, 1)
self.drawingConstraints['hv'] = c
else:
self.drawingConstraints['hv'] = None
self.drawingShape.setPt(1, this_pt)
self.queue_redraw()
sp = self.get_closest_snap_ptref(x, y)
self.update_hover_snap_point(sp)
def do_circle_left_click(self, x, y):
pt = self.screenPtToPt((x, self.size[1] - y))