#
# Copyright © 2009-2010 CEA
# Pierre Raybaut
# Licensed under the terms of the CECILL License
# (see guiqwt/__init__.py for details)
"""
guiqwt.shapes
-------------
The `shapes` module provides geometrical shapes:
* :py:class:`guiqwt.shapes.PolygonShape`
* :py:class:`guiqwt.shapes.RectangleShape`
* :py:class:`guiqwt.shapes.ObliqueRectangleShape`
* :py:class:`guiqwt.shapes.PointShape`
* :py:class:`guiqwt.shapes.SegmentShape`
* :py:class:`guiqwt.shapes.EllipseShape`
* :py:class:`guiqwt.shapes.Axes`
* :py:class:`guiqwt.shapes.XRangeSelection`
A shape is a plot item (derived from QwtPlotItem) that may be displayed
on a 2D plotting widget like :py:class:`guiqwt.curve.CurvePlot`
or :py:class:`guiqwt.image.ImagePlot`.
.. seealso:: module :py:mod:`guiqwt.annotations`
Examples
~~~~~~~~
A shape may be created:
* from the associated plot item class (e.g. `RectangleShape` to create a
rectangle): the item properties are then assigned by creating the
appropriate style parameters object
(:py:class:`guiqwt.styles.ShapeParam`)
>>> from guiqwt.shapes import RectangleShape
>>> from guiqwt.styles import ShapeParam
>>> param = ShapeParam()
>>> param.title = 'My rectangle'
>>> rect_item = RectangleShape(0., 2., 4., 0., param)
* or using the `plot item builder` (see :py:func:`guiqwt.builder.make`):
>>> from guiqwt.builder import make
>>> rect_item = make.rectangle(0., 2., 4., 0., title='My rectangle')
Reference
~~~~~~~~~
.. autoclass:: PolygonShape
:members:
:inherited-members:
.. autoclass:: RectangleShape
:members:
:inherited-members:
.. autoclass:: ObliqueRectangleShape
:members:
:inherited-members:
.. autoclass:: PointShape
:members:
:inherited-members:
.. autoclass:: SegmentShape
:members:
:inherited-members:
.. autoclass:: EllipseShape
:members:
:inherited-members:
.. autoclass:: Axes
:members:
:inherited-members:
.. autoclass:: XRangeSelection
:members:
:inherited-members:
"""
import sys, numpy as np
from math import fabs, sqrt, sin, cos, pi
from guidata.qt.QtGui import QPen, QBrush, QPolygonF, QTransform, QPainter
from guidata.qt.QtCore import Qt, QRectF, QPointF, QPoint, QLineF
from guidata.utils import assert_interfaces_valid, update_dataset
# Local imports
from guiqwt.transitional import QwtPlotItem, QwtSymbol, QwtPlotMarker
from guiqwt.config import CONF, _
from guiqwt.interfaces import IBasePlotItem, IShapeItemType, ISerializableType
from guiqwt.styles import (MarkerParam, ShapeParam, RangeShapeParam,
AxesShapeParam, MARKERSTYLES)
from guiqwt.signals import (SIG_RANGE_CHANGED, SIG_MARKER_CHANGED,
SIG_AXES_CHANGED, SIG_ITEM_MOVED)
from guiqwt.geometry import (vector_norm, vector_projection, vector_rotation,
compute_center)
from guiqwt.baseplot import canvas_to_axes
class AbstractShape(QwtPlotItem):
"""Interface pour les objets manipulables
il n'est pas nécessaire de dériver de QwtShape si on
réutilise une autre classe dérivée de QwtPlotItem
La classe de base
"""
__implements__ = (IBasePlotItem,)
_readonly = False
_private = False
_can_select = True
_can_resize = True
_can_rotate = False #TODO: implement shape rotation?
_can_move = True
def __init__(self):
super(AbstractShape, self).__init__()
self.selected = False
#------IBasePlotItem API----------------------------------------------------
def set_selectable(self, state):
"""Set item selectable state"""
self._can_select = state
def set_resizable(self, state):
"""Set item resizable state
(or any action triggered when moving an handle, e.g. rotation)"""
self._can_resize = state
def set_movable(self, state):
"""Set item movable state"""
self._can_move = state
def set_rotatable(self, state):
"""Set item rotatable state"""
self._can_rotate = state
def can_select(self):
return self._can_select
def can_resize(self):
return self._can_resize
def can_rotate(self):
return self._can_rotate
def can_move(self):
return self._can_move
def types(self):
"""Returns a group or category for this item
this should be a class object inheriting from
IItemType
"""
return (IShapeItemType, )
def set_readonly(self, state):
"""Set object readonly state"""
self._readonly = state
def is_readonly(self):
"""Return object readonly state"""
return self._readonly
def set_private(self, state):
"""Set object as private"""
self._private = state
def is_private(self):
"""Return True if object is private"""
return self._private
def select(self):
"""Select item"""
self.selected = True
self.invalidate_plot()
def unselect(self):
"""Unselect item"""
self.selected = False
self.invalidate_plot()
def hit_test(self, pos):
"""
Return a tuple with four elements:
(distance, attach point, inside, other_object)
distance : distance in pixels (canvas coordinates)
to the closest attach point
attach point: handle of the attach point
inside: True if the mouse button has been clicked inside the object
other_object: if not None, reference of the object which
will be considered as hit instead of self
"""
pass
def get_item_parameters(self, itemparams):
"""
Appends datasets to the list of DataSets describing the parameters
used to customize apearance of this item
"""
pass
def set_item_parameters(self, itemparams):
"""
Change the appearance of this item according
to the parameter set provided
params is a list of Datasets of the same types as those returned
by get_item_parameters
"""
pass
def move_local_point_to(self, handle, pos, ctrl=None):
"""Move a handle as returned by hit_test to the new position pos
ctrl: True if <Ctrl> button is being pressed, False otherwise"""
pt = canvas_to_axes(self, pos)
self.move_point_to(handle, pt, ctrl)
def move_local_shape(self, old_pos, new_pos):
"""Translate the shape such that old_pos becomes new_pos
in canvas coordinates"""
old_pt = canvas_to_axes(self, old_pos)
new_pt = canvas_to_axes(self, new_pos)
self.move_shape(old_pt, new_pt)
if self.plot():
self.plot().emit(SIG_ITEM_MOVED, self, *(old_pt+new_pt))
def move_with_selection(self, delta_x, delta_y):
"""
Translate the shape together with other selected items
delta_x, delta_y: translation in plot coordinates
"""
self.move_shape([0, 0], [delta_x, delta_y])
#------Public API-----------------------------------------------------------
def move_point_to(self, handle, pos, ctrl=None):
pass
def move_shape(self, old_pos, new_pos):
"""Translate the shape such that old_pos becomes new_pos
in axis coordinates"""
pass
def invalidate_plot(self):
plot = self.plot()
if plot is not None:
plot.invalidate()
assert_interfaces_valid(AbstractShape)
class Marker(QwtPlotMarker):
"""
A marker that has two callbacks
for restraining it's coordinates and
displaying it's label
we want to derive from QwtPlotMarker so
we have to reimplement some of AbstractShape's methods
(and PyQt doesn't really like multiple inheritance...)
"""
__implements__ = (IBasePlotItem,)
_readonly = True
_private = False
_can_select = True
_can_resize = True
_can_rotate = False
_can_move = True
def __init__(self, label_cb=None, constraint_cb=None,
markerparam=None):
super(Marker, self).__init__()
self._pending_center_handle = None
self.selected = False
self.label_cb = label_cb
if constraint_cb is None:
constraint_cb = self.center_handle
self.constraint_cb = constraint_cb
if markerparam is None:
self.markerparam = MarkerParam(_("Marker"))
self.markerparam.read_config(CONF, "plot", "marker/cursor")
else:
self.markerparam = markerparam
self.markerparam.update_marker(self)
#------QwtPlotItem API------------------------------------------------------
def draw(self, painter, xmap, ymap, canvasrect):
"""Reimplemented to update label and (eventually) center handle"""
if self._pending_center_handle:
x, y = self.center_handle(self.xValue(), self.yValue())
self.setValue(x, y)
self.update_label()
QwtPlotMarker.draw(self, painter, xmap, ymap, canvasrect)
#------IBasePlotItem API----------------------------------------------------
def set_selectable(self, state):
"""Set item selectable state"""
self._can_select = state
def set_resizable(self, state):
"""Set item resizable state
(or any action triggered when moving an handle, e.g. rotation)"""
self._can_resize = state
def set_movable(self, state):
"""Set item movable state"""
self._can_move = state
def set_rotatable(self, state):
"""Set item rotatable state"""
self._can_rotate = state
def can_select(self):
return self._can_select
def can_resize(self):
return self._can_resize
def can_rotate(self):
return self._can_rotate
def can_move(self):
return self._can_move
def types(self):
"""Returns a group or category for this item
this should be a class object inheriting from
IItemType
"""
return (IShapeItemType,)
def set_readonly(self, state):
"""Set object readonly state"""
self._readonly = state
def is_readonly(self):
"""Return object readonly state"""
return self._readonly
def set_private(self, state):
"""Set object as private"""
self._private = state
def is_private(self):
"""Return True if object is private"""
return self._private
def select(self):
"""
Select the object and eventually change its appearance to highlight the
fact that it's selected
"""
if self.selected:
# Already selected
return
self.selected = True
self.markerparam.update_marker(self)
self.invalidate_plot()
def unselect(self):
"""
Unselect the object and eventually restore its original appearance to
highlight the fact that it's not selected anymore
"""
self.selected = False
self.markerparam.update_marker(self)
self.invalidate_plot()
def hit_test(self, pos):
"""
Return a tuple with four elements:
(distance, attach point, inside, other_object)
distance : distance in pixels (canvas coordinates)
to the closest attach point
attach point: handle of the attach point
inside: True if the mouse button has been clicked inside the object
other_object: if not None, reference of the object which
will be considered as hit instead of self
"""
plot = self.plot()
xc, yc = pos.x(), pos.y()
x = plot.transform(self.xAxis(), self.xValue())
y = plot.transform(self.yAxis(), self.yValue())
ms = self.markerparam.markerstyle
# The following assert has no purpose except reminding that the
# markerstyle is one of the MARKERSTYLES dictionary values, in case
# this dictionary evolves in the future (this should not fail):
assert ms in MARKERSTYLES.values()
if ms == "NoLine":
return sqrt((x-xc)**2 + (y-yc)**2), 0, False, None
elif ms == "HLine":
return sqrt((y-yc)**2), 0, False, None
elif ms == "VLine":
return sqrt((x-xc)**2), 0, False, None
elif ms == "Cross":
return sqrt(min((x-xc)**2,(y-yc)**2) ), 0, False, None
def get_item_parameters(self, itemparams):
"""
Appends datasets to the list of DataSets describing the parameters
used to customize apearance of this item
"""
self.markerparam.update_param(self)
itemparams.add("MarkerParam", self, self.markerparam)
def set_item_parameters(self, itemparams):
"""
Change the appearance of this item according
to the parameter set provided
params is a list of Datasets of the same types as those returned
by get_item_parameters
"""
update_dataset(self.markerparam, itemparams.get("MarkerParam"),
visible_only=True)
self.markerparam.update_marker(self)
if self.selected:
self.select()
def move_local_point_to(self, handle, pos, ctrl=None):
"""Move a handle as returned by hit_test to the new position pos
ctrl: True if <Ctrl> button is being pressed, False otherwise"""
x, y = canvas_to_axes(self, pos)
self.set_pos(x, y)
def move_local_shape(self, old_pos, new_pos):
"""Translate the shape such that old_pos becomes new_pos
in canvas coordinates"""
old_pt = canvas_to_axes(self, old_pos)
new_pt = canvas_to_axes(self, new_pos)
self.move_shape(old_pt, new_pt)
def move_with_selection(self, delta_x, delta_y):
"""
Translate the shape together with other selected items
delta_x, delta_y: translation in plot coordinates
"""
self.move_shape([0, 0], [delta_x, delta_y])
#------Public API-----------------------------------------------------------
def set_style(self, section, option):
self.markerparam.read_config(CONF, section, option)
self.markerparam.update_marker(self)
def set_pos(self, x=None, y=None):
if x is None:
x = self.xValue()
if y is None:
y = self.yValue()
if self.constraint_cb:
x, y = self.constraint_cb(x, y)
self.setValue(x, y)
if self.plot():
self.plot().emit(SIG_MARKER_CHANGED, self)
def get_pos(self):
return self.xValue(), self.yValue()
def set_markerstyle(self, style):
param = self.markerparam
param.set_markerstyle(style)
param.update_marker(self)
def is_vertical(self):
"""Return True if this is a vertical cursor"""
return self.lineStyle() == QwtPlotMarker.VLine
def is_horizontal(self):
"""Return True if this is an horizontal cursor"""
return self.lineStyle() == QwtPlotMarker.HLine
def center_handle(self, x, y):
"""Center cursor handle depending on marker style (|, -)"""
plot = self.plot()
if plot is None:
self._pending_center_handle = True
else:
self._pending_center_handle = False
if self.is_vertical():
ymap = plot.canvasMap(self.yAxis())
y_top, y_bottom = ymap.s1(), ymap.s2()
y = .5*(y_top+y_bottom)
elif self.is_horizontal():
xmap = plot.canvasMap(self.xAxis())
x_left, x_right = xmap.s1(), xmap.s2()
x = .5*(x_left+x_right)
return x, y
def move_shape(self, old_pos, new_pos):
"""Translate the shape such that old_pos becomes new_pos
in canvas coordinates"""
dx = new_pos[0]-old_pos[0]
dy = new_pos[1]-old_pos[1]
x, y = self.xValue(), self.yValue()
return self.move_point_to(0, (x+dx, y+dy))
def invalidate_plot(self):
plot = self.plot()
if plot is not None:
plot.invalidate()
def update_label(self):
x, y = self.xValue(), self.yValue()
if self.label_cb:
label = self.label_cb(x, y)
if label is None:
return
elif self.is_vertical():
label = "x = %g" % x
elif self.is_horizontal():
label = "y = %g" % y
else:
label = "x = %g<br>y = %g" % (x, y)
text = self.label()
text.setText(label)
self.setLabel(text)
plot = self.plot()
if plot is not None:
xaxis = plot.axisScaleDiv(self.xAxis())
if x < (xaxis.upperBound()+xaxis.lowerBound())/2:
hor_alignment = Qt.AlignRight
else:
hor_alignment = Qt.AlignLeft
yaxis = plot.axisScaleDiv(self.yAxis())
ymap = plot.canvasMap(self.yAxis())
y_top, y_bottom = ymap.s1(), ymap.s2()
if y < .5*(yaxis.upperBound()+yaxis.lowerBound()):
if y_top > y_bottom:
ver_alignment = Qt.AlignBottom
else:
ver_alignment = Qt.AlignTop
else:
if y_top > y_bottom:
ver_alignment = Qt.AlignTop
else:
ver_alignment = Qt.AlignBottom
self.setLabelAlignment(hor_alignment|ver_alignment)
assert_interfaces_valid(Marker)
class PolygonShape(AbstractShape):
[docs] __implements__ = (IBasePlotItem, ISerializableType)
ADDITIONNAL_POINTS = 0 # Number of points which are not part of the shape
LINK_ADDITIONNAL_POINTS = False # Link additionnal points with dotted lines
CLOSED = True
def __init__(self, points=None, closed=None, shapeparam=None):
super(PolygonShape, self).__init__()
self.closed = self.CLOSED if closed is None else closed
self.selected = False
if shapeparam is None:
self.shapeparam = ShapeParam(_("Shape"), icon="rectangle.png")
else:
self.shapeparam = shapeparam
self.shapeparam.update_shape(self)
self.pen = QPen()
self.brush = QBrush()
self.symbol = QwtSymbol.NoSymbol
self.sel_pen = QPen()
self.sel_brush = QBrush()
self.sel_symbol = QwtSymbol.NoSymbol
self.points = np.zeros( (0, 2), float )
if points is not None:
self.set_points(points)
def types(self):
return (IShapeItemType, ISerializableType)
def __reduce__(self):
self.shapeparam.update_param(self)
state = (self.shapeparam, self.points, self.closed, self.z())
return (PolygonShape, (), state)
def __setstate__(self, state):
param, points, z = state
self.points = points
self.setZ(z)
self.shapeparam = param
self.shapeparam.update_shape(self)
def serialize(self, writer):
[docs] """Serialize object to HDF5 writer"""
self.shapeparam.update_param(self)
writer.write(self.shapeparam, group_name='shapeparam')
writer.write(self.points, group_name='points')
writer.write(self.closed, group_name='closed')
writer.write(self.z(), group_name='z')
def deserialize(self, reader):
[docs] """Deserialize object from HDF5 reader"""
self.closed = reader.read('closed')
self.shapeparam = ShapeParam(_("Shape"), icon="rectangle.png")
reader.read('shapeparam', instance=self.shapeparam)
self.shapeparam.update_shape(self)
self.points = reader.read(group_name='points', func=reader.read_array)
self.setZ(reader.read('z'))
#----Public API-------------------------------------------------------------
def set_style(self, section, option):
self.shapeparam.read_config(CONF, section, option)
self.shapeparam.update_shape(self)
def set_points(self, points):
self.points = np.array(points, float)
assert self.points.shape[1] == 2
def get_points(self):
[docs] """Return polygon points"""
return self.points
def get_bounding_rect_coords(self):
[docs] """Return bounding rectangle coordinates (in plot coordinates)"""
poly = QPolygonF()
shape_points = self.points[:-self.ADDITIONNAL_POINTS]
for i in xrange(shape_points.shape[0]):
poly.append(QPointF(shape_points[i, 0], shape_points[i, 1]))
return poly.boundingRect().getCoords()
def transform_points(self, xMap, yMap):
points = QPolygonF()
for i in xrange(self.points.shape[0]):
points.append(QPointF(xMap.transform(self.points[i, 0]),
yMap.transform(self.points[i, 1])))
return points
def get_reference_point(self):
if self.points.size:
return self.points.mean(axis=0)
def get_pen_brush(self, xMap, yMap):
if self.selected:
pen = self.sel_pen
brush = self.sel_brush
sym = self.sel_symbol
else:
pen = self.pen
brush = self.brush
sym = self.symbol
if self.points.size > 0:
x0, y0 = self.get_reference_point()
xx0 = xMap.transform(x0)
yy0 = yMap.transform(y0)
try:
# Optimized version in PyQt >= v4.5
t0 = QTransform.fromTranslate(xx0, yy0)
except AttributeError:
# Fallback for PyQt <= v4.4
t0 = QTransform().translate(xx0, yy0)
tr = brush.transform()
tr = tr*t0
brush = QBrush(brush)
brush.setTransform(tr)
return pen, brush, sym
def draw(self, painter, xMap, yMap, canvasRect):
pen, brush, symbol = self.get_pen_brush(xMap, yMap)
painter.setRenderHint(QPainter.Antialiasing)
painter.setPen(pen)
painter.setBrush(brush)
points = self.transform_points(xMap, yMap)
if self.ADDITIONNAL_POINTS:
shape_points = points[:-self.ADDITIONNAL_POINTS]
other_points = points[-self.ADDITIONNAL_POINTS:]
else:
shape_points = points
other_points = []
if self.closed:
painter.drawPolygon(shape_points)
else:
painter.drawPolyline(shape_points)
if symbol != QwtSymbol.NoSymbol:
for i in xrange(points.size()):
symbol.draw(painter, points[i].toPoint())
if self.LINK_ADDITIONNAL_POINTS and other_points:
pen2 = painter.pen()
pen2.setStyle(Qt.DotLine)
painter.setPen(pen2)
painter.drawPolyline(other_points)
def poly_hit_test(self, plot, ax, ay, pos):
pos = QPointF(pos)
dist = sys.maxint
handle = -1
Cx, Cy = pos.x(), pos.y()
poly = QPolygonF()
pts = self.points
for i in xrange(pts.shape[0]):
# On calcule la distance dans le repère du canvas
px = plot.transform(ax, pts[i, 0])
py = plot.transform(ay, pts[i, 1])
if i < pts.shape[0]-self.ADDITIONNAL_POINTS:
poly.append(QPointF(px, py))
d = (Cx-px)**2 + (Cy-py)**2
if d < dist:
dist = d
handle = i
inside = poly.containsPoint(QPointF(Cx, Cy), Qt.OddEvenFill)
return sqrt(dist), handle, inside, None
def hit_test(self, pos):
[docs] """return (dist, handle, inside)"""
if not self.plot():
return sys.maxint, 0, False, None
return self.poly_hit_test(self.plot(), self.xAxis(), self.yAxis(), pos)
def add_local_point(self, pos):
pt = canvas_to_axes(self, pos)
return self.add_point(pt)
def add_point(self, pt):
N,_ = self.points.shape
self.points = np.resize(self.points, (N+1, 2))
self.points[N, :] = pt
return N
def del_point(self, handle):
self.points = np.delete(self.points, handle, 0)
if handle < len(self.points):
return handle
else:
return self.points.shape[0]-1
def move_point_to(self, handle, pos, ctrl=None):
self.points[handle, :] = pos
def move_shape(self, old_pos, new_pos):
dx = new_pos[0]-old_pos[0]
dy = new_pos[1]-old_pos[1]
self.points += np.array([[dx, dy]])
def get_item_parameters(self, itemparams):
self.shapeparam.update_param(self)
itemparams.add("ShapeParam", self, self.shapeparam)
def set_item_parameters(self, itemparams):
update_dataset(self.shapeparam, itemparams.get("ShapeParam"),
visible_only=True)
self.shapeparam.update_shape(self)
assert_interfaces_valid(PolygonShape)
class PointShape(PolygonShape):
[docs] CLOSED = False
def __init__(self, x=0, y=0, shapeparam=None):
super(PointShape, self).__init__(shapeparam=shapeparam)
self.set_pos(x, y)
def set_pos(self, x, y):
[docs] """Set the point coordinates to (x, y)"""
self.set_points([(x, y)])
def get_pos(self):
[docs] """Return the point coordinates"""
return tuple(self.points[0])
def move_point_to(self, handle, pos, ctrl=None):
nx, ny = pos
self.points[0] = (nx, ny)
def __reduce__(self):
state = (self.shapeparam, self.points, self.z())
return (self.__class__, (), state)
assert_interfaces_valid(PointShape)
class SegmentShape(PolygonShape):
[docs] CLOSED = False
ADDITIONNAL_POINTS = 1 # Number of points which are not part of the shape
def __init__(self, x1=0, y1=0, x2=0, y2=0, shapeparam=None):
super(SegmentShape, self).__init__(shapeparam=shapeparam)
self.set_rect(x1, y1, x2, y2)
def set_rect(self, x1, y1, x2, y2):
[docs] """
Set the start point of this segment to (x1, y1)
and the end point of this line to (x2, y2)
"""
self.set_points([(x1, y1), (x2, y2),
(.5*(x1+x2), .5*(y1+y2))])
def get_rect(self):
return tuple(self.points[0])+tuple(self.points[1])
def move_point_to(self, handle, pos, ctrl=None):
nx, ny = pos
x1, y1, x2, y2 = self.get_rect()
if handle == 0:
self.set_rect(nx, ny, x2, y2)
elif handle == 1:
self.set_rect(x1, y1, nx, ny)
elif handle in (2, -1):
delta = (nx, ny)-self.points.mean(axis=0)
self.points += delta
def __reduce__(self):
state = (self.shapeparam, self.points, self.z())
return (self.__class__, (), state)
def __setstate__(self, state):
param, points, z = state
#----------------------------------------------------------------------
# compatibility with previous version of SegmentShape:
x1, y1, x2, y2, x3, y3 = points.ravel()
v12 = np.array((x2-x1, y2-y1))
v13 = np.array((x3-x1, y3-y1))
if np.linalg.norm(v12) < np.linalg.norm(v13):
# old pickle format
points = np.flipud(np.roll(points, -1, axis=0))
#----------------------------------------------------------------------
self.points = points
self.setZ(z)
self.shapeparam = param
self.shapeparam.update_shape(self)
assert_interfaces_valid(SegmentShape)
class RectangleShape(PolygonShape):
[docs] CLOSED = True
def __init__(self, x1=0, y1=0, x2=0, y2=0, shapeparam=None):
super(RectangleShape, self).__init__(shapeparam=shapeparam)
self.set_rect(x1, y1, x2, y2)
def set_rect(self, x1, y1, x2, y2):
[docs] """
Set the coordinates of the rectangle's top-left corner to (x1, y1),
and of its bottom-right corner to (x2, y2).
"""
self.set_points([(x1, y1), (x2, y1), (x2, y2), (x1, y2)])
def get_rect(self):
return tuple(self.points[0])+tuple(self.points[2])
def get_center(self):
[docs] """Return center coordinates: (xc, yc)"""
return compute_center(*self.get_rect())
def move_point_to(self, handle, pos, ctrl=None):
nx, ny = pos
x1, y1, x2, y2 = self.get_rect()
if handle == 0:
self.set_rect(nx, ny, x2, y2)
elif handle == 1:
self.set_rect(x1, ny, nx, y2)
elif handle == 2:
self.set_rect(x1, y1, nx, ny)
elif handle == 3:
self.set_rect(nx, y1, x2, ny)
elif handle == -1:
delta = (nx, ny)-self.points.mean(axis=0)
self.points += delta
def __reduce__(self):
state = (self.shapeparam, self.points, self.z())
return (self.__class__, (), state)
assert_interfaces_valid(RectangleShape)
def _no_null_vector(x0, y0, x1, y1, x2, y2, x3, y3):
return vector_norm(x0, y0, x1, y1) and vector_norm(x0, y0, x2, y2) and \
vector_norm(x0, y0, x3, y3) and vector_norm(x1, y1, x2, y2) and \
vector_norm(x1, y1, x3, y3) and vector_norm(x2, y2, x3, y3)
class ObliqueRectangleShape(PolygonShape):
[docs] CLOSED = True
ADDITIONNAL_POINTS = 2 # Number of points which are not part of the shape
LINK_ADDITIONNAL_POINTS = True # Link additionnal points with dotted lines
def __init__(self, x0=0, y0=0, x1=0, y1=0, x2=0, y2=0, x3=0, y3=0,
shapeparam=None):
super(ObliqueRectangleShape, self).__init__(shapeparam=shapeparam)
self.set_rect(x0, y0, x1, y1, x2, y2, x3, y3)
def set_rect(self, x0, y0, x1, y1, x2, y2, x3, y3):
[docs] u"""
Set the rectangle corners coordinates:
(x0, y0): top-left corner
(x1, y1): top-right corner
(x2, y2): bottom-right corner
(x3, y3): bottom-left corner
x: additionnal points (handles used for rotation -- other handles
being used for rectangle resizing)
(x0, y0)------>(x1, y1)
↑ |
| |
x x
| |
| ↓
(x3, y3)<------(x2, y2)
"""
self.set_points([(x0, y0), (x1, y1), (x2, y2), (x3, y3),
(.5*(x0+x3), .5*(y0+y3)),
(.5*(x1+x2), .5*(y1+y2))])
def get_rect(self):
return self.points.ravel()[:-self.ADDITIONNAL_POINTS*2]
def get_center(self):
[docs] """Return center coordinates: (xc, yc)"""
rect = tuple(self.points[0])+tuple(self.points[2])
return compute_center(*rect)
def move_point_to(self, handle, pos, ctrl=None):
nx, ny = pos
x0, y0, x1, y1, x2, y2, x3, y3 = self.get_rect()
if handle == 0:
if vector_norm(x2, y2, x3, y3) and vector_norm(x2, y2, x1, y1):
v0n = np.array((nx-x0, ny-y0))
x3, y3 = vector_projection(v0n, x2, y2, x3, y3)
x1, y1 = vector_projection(v0n, x2, y2, x1, y1)
x0, y0 = nx, ny
if _no_null_vector(x0, y0, x1, y1, x2, y2, x3, y3):
self.set_rect(x0, y0, x1, y1, x2, y2, x3, y3)
elif handle == 1:
if vector_norm(x3, y3, x0, y0) and vector_norm(x3, y3, x2, y2):
v1n = np.array((nx-x1, ny-y1))
x0, y0 = vector_projection(v1n, x3, y3, x0, y0)
x2, y2 = vector_projection(v1n, x3, y3, x2, y2)
x1, y1 = nx, ny
if _no_null_vector(x0, y0, x1, y1, x2, y2, x3, y3):
self.set_rect(x0, y0, x1, y1, x2, y2, x3, y3)
elif handle == 2:
if vector_norm(x0, y0, x1, y1) and vector_norm(x0, y0, x3, y3):
v2n = np.array((nx-x2, ny-y2))
x1, y1 = vector_projection(v2n, x0, y0, x1, y1)
x3, y3 = vector_projection(v2n, x0, y0, x3, y3)
x2, y2 = nx, ny
if _no_null_vector(x0, y0, x1, y1, x2, y2, x3, y3):
self.set_rect(x0, y0, x1, y1, x2, y2, x3, y3)
elif handle == 3:
if vector_norm(x1, y1, x0, y0) and vector_norm(x1, y1, x2, y2):
v3n = np.array((nx-x3, ny-y3))
x0, y0 = vector_projection(v3n, x1, y1, x0, y0)
x2, y2 = vector_projection(v3n, x1, y1, x2, y2)
x3, y3 = nx, ny
if _no_null_vector(x0, y0, x1, y1, x2, y2, x3, y3):
self.set_rect(x0, y0, x1, y1, x2, y2, x3, y3)
elif handle == 4:
x4, y4 = .5*(x0+x3), .5*(y0+y3)
x5, y5 = .5*(x1+x2), .5*(y1+y2)
nx, ny = x0+nx-x4, y0+ny-y4 # moving handle #4 to handle #0
v10 = np.array((x0-x1, y0-y1))
v12 = np.array((x2-x1, y2-y1))
v10n = np.array((nx-x1, ny-y1))
k = np.linalg.norm(v12)/np.linalg.norm(v10)
v12n = vector_rotation(-np.pi/2, *v10n)*k
x2, y2 = v12n+np.array([x1, y1])
x3, y3 = v12n+v10n+np.array([x1, y1])
x0, y0 = nx, ny
dx = x5-.5*(x1+x2)
dy = y5-.5*(y1+y2)
x0, y0 = x0+dx, y0+dy
x1, y1 = x1+dx, y1+dy
x2, y2 = x2+dx, y2+dy
x3, y3 = x3+dx, y3+dy
self.set_rect(x0, y0, x1, y1, x2, y2, x3, y3)
elif handle == 5:
x4, y4 = .5*(x0+x3), .5*(y0+y3)
x5, y5 = .5*(x1+x2), .5*(y1+y2)
nx, ny = x1+nx-x5, y1+ny-y5 # moving handle #5 to handle #1
v01 = np.array((x1-x0, y1-y0))
v03 = np.array((x3-x0, y3-y0))
v01n = np.array((nx-x0, ny-y0))
k = np.linalg.norm(v03)/np.linalg.norm(v01)
v03n = vector_rotation(np.pi/2, *v01n)*k
x3, y3 = v03n+np.array([x0, y0])
x2, y2 = v03n+v01n+np.array([x0, y0])
x1, y1 = nx, ny
dx = x4-.5*(x0+x3)
dy = y4-.5*(y0+y3)
x0, y0 = x0+dx, y0+dy
x1, y1 = x1+dx, y1+dy
x2, y2 = x2+dx, y2+dy
x3, y3 = x3+dx, y3+dy
self.set_rect(x0, y0, x1, y1, x2, y2, x3, y3)
elif handle == -1:
delta = (nx, ny)-self.points.mean(axis=0)
self.points += delta
def __reduce__(self):
state = (self.shapeparam, self.points, self.z())
return (self.__class__, (), state)
assert_interfaces_valid(ObliqueRectangleShape)
#FIXME: EllipseShape's ellipse drawing is invalid when aspect_ratio != 1
class EllipseShape(PolygonShape):
[docs] CLOSED = True
def __init__(self, x1=0, y1=0, x2=0, y2=0, shapeparam=None):
super(EllipseShape, self).__init__(shapeparam=shapeparam)
self.is_ellipse = False
self.set_xdiameter(x1, y1, x2, y2)
def switch_to_ellipse(self):
self.is_ellipse = True
def set_xdiameter(self, x0, y0, x1, y1):
[docs] """Set the coordinates of the ellipse's X-axis diameter"""
xline = QLineF(x0, y0, x1, y1)
yline = xline.normalVector()
yline.translate(xline.pointAt(.5)-xline.p1())
if self.is_ellipse:
yline.setLength(self.get_yline().length())
else:
yline.setLength(xline.length())
yline.translate(yline.pointAt(.5)-yline.p2())
self.set_points([(x0, y0), (x1, y1),
(yline.x1(), yline.y1()), (yline.x2(), yline.y2())])
def get_xdiameter(self):
[docs] """Return the coordinates of the ellipse's X-axis diameter"""
return tuple(self.points[0])+tuple(self.points[1])
def set_ydiameter(self, x2, y2, x3, y3):
[docs] """Set the coordinates of the ellipse's Y-axis diameter"""
yline = QLineF(x2, y2, x3, y3)
xline = yline.normalVector()
xline.translate(yline.pointAt(.5)-yline.p1())
if self.is_ellipse:
xline.setLength(self.get_xline().length())
xline.translate(xline.pointAt(.5)-xline.p2())
self.set_points([(xline.x1(), xline.y1()), (xline.x2(), xline.y2()),
(x2, y2), (x3, y3)])
def get_ydiameter(self):
[docs] """Return the coordinates of the ellipse's Y-axis diameter"""
return tuple(self.points[2])+tuple(self.points[3])
def get_rect(self):
[docs] """Circle only!"""
(x0, y0), (x1, y1) = self.points[0], self.points[1]
xc, yc = .5*(x0+x1), .5*(y0+y1)
radius = .5*np.sqrt((x1-x0)**2+(y1-y0)**2)
return xc-radius, yc-radius, xc+radius, yc+radius
def get_center(self):
[docs] """Return center coordinates: (xc, yc)"""
return compute_center(*self.get_xdiameter())
def set_rect(self, x0, y0, x1, y1):
[docs] """Circle only!"""
self.set_xdiameter(x0, .5*(y0+y1), x1, .5*(y0+y1))
def compute_elements(self, xMap, yMap):
[docs] """Return points, lines and ellipse rect"""
points = self.transform_points(xMap, yMap)
line0 = QLineF(points[0], points[1])
line1 = QLineF(points[2], points[3])
rect = QRectF()
rect.setWidth(line0.length())
rect.setHeight(line1.length())
rect.moveCenter(line0.pointAt(.5))
return points, line0, line1, rect
def hit_test(self, pos):
[docs] """return (dist, handle, inside)"""
if not self.plot():
return sys.maxint, 0, False, None
dist, handle, inside, other = self.poly_hit_test(self.plot(),
self.xAxis(), self.yAxis(), pos)
if not inside:
xMap = self.plot().canvasMap(self.xAxis())
yMap = self.plot().canvasMap(self.yAxis())
_points, _line0, _line1, rect = self.compute_elements(xMap, yMap)
inside = rect.contains(QPointF(pos))
return dist, handle, inside, other
def draw(self, painter, xMap, yMap, canvasRect):
points, line0, line1, rect = self.compute_elements(xMap, yMap)
pen, brush, symbol = self.get_pen_brush(xMap, yMap)
painter.setRenderHint(QPainter.Antialiasing)
painter.setPen(pen)
painter.setBrush(brush)
painter.drawLine(line0)
painter.drawLine(line1)
painter.save()
painter.translate(rect.center())
painter.rotate(-line0.angle())
painter.translate(-rect.center())
painter.drawEllipse(rect.toRect())
painter.restore()
if symbol != QwtSymbol.NoSymbol:
for i in xrange(points.size()):
symbol.draw(painter, points[i].toPoint())
def get_xline(self):
return QLineF(*(tuple(self.points[0])+tuple(self.points[1])))
def get_yline(self):
return QLineF(*(tuple(self.points[2])+tuple(self.points[3])))
def move_point_to(self, handle, pos, ctrl=None):
nx, ny = pos
if handle == 0:
x1, y1 = self.points[1]
if ctrl:
# When <Ctrl> is pressed, the center position is unchanged
x0, y0 = self.points[0]
x1, y1 = x1+x0-nx, y1+y0-ny
self.set_xdiameter(nx, ny, x1, y1)
elif handle == 1:
x0, y0 = self.points[0]
if ctrl:
# When <Ctrl> is pressed, the center position is unchanged
x1, y1 = self.points[1]
x0, y0 = x0+x1-nx, y0+y1-ny
self.set_xdiameter(x0, y0, nx, ny)
elif handle == 2:
x3, y3 = self.points[3]
if ctrl:
# When <Ctrl> is pressed, the center position is unchanged
x2, y2 = self.points[2]
x3, y3 = x3+x2-nx, y3+y2-ny
self.set_ydiameter(nx, ny, x3, y3)
elif handle == 3:
x2, y2 = self.points[2]
if ctrl:
# When <Ctrl> is pressed, the center position is unchanged
x3, y3 = self.points[3]
x2, y2 = x2+x3-nx, y2+y3-ny
self.set_ydiameter(x2, y2, nx, ny)
elif handle == -1:
delta = (nx, ny)-self.points.mean(axis=0)
self.points += delta
def __reduce__(self):
state = (self.shapeparam, self.points, self.z())
return (self.__class__, (), state)
assert_interfaces_valid(EllipseShape)
class Axes(PolygonShape):
[docs] """Axes( (0,1), (1,1), (0,0) )"""
CLOSED = True
def __init__(self, p0=(0, 0), p1=(0, 0), p2=(0, 0),
axesparam=None, shapeparam=None):
super(Axes, self).__init__(shapeparam=shapeparam)
self.set_rect(p0, p1, p2)
self.arrow_angle = 15 # degrees
self.arrow_size = 0.05 # % of axe length
self.x_pen = self.pen
self.x_brush = self.brush
self.y_pen = self.pen
self.y_brush = self.brush
if axesparam is None:
self.axesparam = AxesShapeParam(_("Axes"), icon="gtaxes.png")
else:
self.axesparam = axesparam
self.axesparam.update_param(self)
def __reduce__(self):
self.axesparam.update_param(self)
state = (self.shapeparam, self.axesparam, self.points, self.z())
return (self.__class__, (), state)
def __setstate__(self, state):
shapeparam, axesparam, points, z = state
self.points = points
self.setZ(z)
self.shapeparam = shapeparam
self.shapeparam.update_shape(self)
self.axesparam = axesparam
self.axesparam.update_axes(self)
def serialize(self, writer):
[docs] """Serialize object to HDF5 writer"""
super(Axes, self).serialize(writer)
self.axesparam.update_param(self)
writer.write(self.axesparam, group_name='axesparam')
def deserialize(self, reader):
[docs] """Deserialize object from HDF5 reader"""
super(Axes, self).deserialize(reader)
self.axesparam = AxesShapeParam(_("Axes"), icon="gtaxes.png")
reader.read('axesparam', instance=self.axesparam)
self.axesparam.update_axes(self)
def get_transform_matrix(self, dx=1., dy=1.):
p0, p1, _p3, p2 = [np.array([p[0], p[1], 1.0]) for p in self.points]
matrix = np.array([(p1-p0)/dx, (p2-p0)/dy, p0])
if abs(np.linalg.det(matrix)) > 1e-12:
return np.linalg.inv(matrix)
def set_rect(self, p0, p1, p2):
p3x = p1[0]+p2[0]-p0[0]
p3y = p1[1]+p2[1]-p0[1]
self.set_points([p0, p1, (p3x, p3y), p2])
def set_style(self, section, option):
PolygonShape.set_style(self, section, option+"/border")
self.axesparam.read_config(CONF, section, option)
self.axesparam.update_axes(self)
def move_point_to(self, handle, pos, ctrl=None):
_nx, _ny = pos
p0, p1, _p3, p2 = list(self.points)
d1x = p1[0]-p0[0]
d1y = p1[1]-p0[1]
d2x = p2[0]-p0[0]
d2y = p2[1]-p0[1]
if handle == 0:
pp0 = pos
pp1 = pos[0] + d1x, pos[1] + d1y
pp2 = pos[0] + d2x, pos[1] + d2y
elif handle == 1:
pp0 = p0
pp1 = pos
pp2 = p2
elif handle == 3:
pp0 = p0
pp1 = p1
pp2 = pos
elif handle == 2:
# find (a,b) such that p3 = a*d1 + b*d2 + p0
d3x = pos[0]-p0[0]
d3y = pos[1]-p0[1]
det = d1x*d2y-d2x*d1y
if abs(det)<1e-6:
# reset
d1x = d2y = 1.
d1y = d2x = 0.
det = 1.
a = (d2y*d3x - d2x*d3y) / det
b = (-d1y*d3x + d1x*d3y) / det
_pp3 = pos
pp1 = p0[0] + a*d1x, p0[1] + a*d1y
pp2 = p0[0] + b*d2x, p0[1] + b*d2y
pp0 = p0
self.set_rect(pp0, pp1, pp2)
if self.plot():
self.plot().emit(SIG_AXES_CHANGED, self)
def move_shape(self, old_pos, new_pos):
[docs] """Overriden to emit the axes_changed signal"""
PolygonShape.move_shape(self, old_pos, new_pos)
if self.plot():
self.plot().emit(SIG_AXES_CHANGED, self)
def draw(self, painter, xMap, yMap, canvasRect):
PolygonShape.draw(self, painter, xMap, yMap, canvasRect)
p0, p1, _, p2 = list(self.points)
painter.setPen(self.x_pen)
painter.setBrush(self.x_brush)
self.draw_arrow(painter, xMap, yMap, p0, p1)
painter.setPen(self.y_pen)
painter.setBrush(self.y_brush)
self.draw_arrow(painter, xMap, yMap, p0, p2)
def draw_arrow(self, painter, xMap, yMap, p0, p1):
sz = self.arrow_size
angle = pi*self.arrow_angle/180.
ca, sa = cos(angle), sin(angle)
d1x = (xMap.transform(p1[0])-xMap.transform(p0[0]))
d1y = (yMap.transform(p1[1])-yMap.transform(p0[1]))
norm = sqrt(d1x**2+d1y**2)
if abs(norm) < 1e-6:
return
d1x *= sz/norm
d1y *= sz/norm
n1x = -d1y
n1y = d1x
# arrow : a0 - a1 == p1 - a2
a1x = xMap.transform(p1[0])
a1y = yMap.transform(p1[1])
a0x = a1x - ca*d1x + sa*n1x
a0y = a1y - ca*d1y + sa*n1y
a2x = a1x - ca*d1x - sa*n1x
a2y = a1y - ca*d1y - sa*n1y
poly = QPolygonF()
poly.append(QPointF(a0x, a0y))
poly.append(QPointF(a1x, a1y))
poly.append(QPointF(a2x, a2y))
painter.drawPolygon(poly)
def get_item_parameters(self, itemparams):
PolygonShape.get_item_parameters(self, itemparams)
self.axesparam.update_param(self)
itemparams.add("AxesShapeParam", self, self.axesparam)
def set_item_parameters(self, itemparams):
PolygonShape.set_item_parameters(self, itemparams)
update_dataset(self.axesparam, itemparams.get("AxesShapeParam"),
visible_only=True)
self.axesparam.update_axes(self)
assert_interfaces_valid(Axes)
class XRangeSelection(AbstractShape):
[docs] def __init__(self, _min, _max, shapeparam=None):
super(XRangeSelection, self).__init__()
self._min = _min
self._max = _max
if shapeparam is None:
self.shapeparam = RangeShapeParam(_("Range"), icon="xrange.png")
self.shapeparam.read_config(CONF, "histogram", "range")
else:
self.shapeparam = shapeparam
self.pen = None
self.sel_pen = None
self.brush = None
self.handle = None
self.symbol = None
self.sel_symbol = None
self.shapeparam.update_range(self) # creates all the above QObjects
def get_handles_pos(self):
plot = self.plot()
rct = plot.canvas().contentsRect()
y = rct.center().y()
x0 = plot.transform(self.xAxis(), self._min)
x1 = plot.transform(self.xAxis(), self._max)
return x0, x1, y
def draw(self, painter, xMap, yMap, canvasRect):
plot = self.plot()
if not plot:
return
if self.selected:
pen = self.sel_pen
sym = self.sel_symbol
else:
pen = self.pen
sym = self.symbol
rct = plot.canvas().contentsRect()
rct2 = QRectF(rct)
rct2.setLeft(xMap.transform(self._min))
rct2.setRight(xMap.transform(self._max))
painter.fillRect(rct2, self.brush)
painter.setPen(pen)
painter.drawLine(rct2.topLeft(), rct2.bottomLeft())
painter.drawLine(rct2.topRight(), rct2.bottomRight())
dash = QPen(pen)
dash.setStyle(Qt.DashLine)
dash.setWidth(1)
painter.setPen(dash)
painter.drawLine(rct2.center().x(), rct2.top(),
rct2.center().x(), rct2.bottom())
painter.setPen(pen)
x0, x1, y = self.get_handles_pos()
sym.draw(painter, QPoint(x0,y))
sym.draw(painter, QPoint(x1,y))
def hit_test(self, pos):
x, _y = pos.x(), pos.y()
x0, x1, _yp = self.get_handles_pos()
d0 = fabs(x0-x)
d1 = fabs(x1-x)
d2 = fabs((x0+x1)/2-x)
z = np.array([d0, d1, d2])
dist = z.min()
handle = z.argmin()
inside = bool(x0<x<x1)
return dist, handle, inside, None
def move_local_point_to(self, handle, pos, ctrl=None):
[docs] """Move a handle as returned by hit_test to the new position pos
ctrl: True if <Ctrl> button is being pressed, False otherwise"""
x, _y = canvas_to_axes(self, pos)
self.move_point_to(handle, (x, 0))
def move_point_to(self, hnd, pos, ctrl=None):
val, _ = pos
if hnd == 0:
self._min = val
elif hnd == 1:
self._max = val
elif hnd == 2:
move = val-(self._max+self._min)/2
self._min += move
self._max += move
self.plot().emit(SIG_RANGE_CHANGED, self, self._min, self._max)
#self.plot().replot()
def get_range(self):
return self._min, self._max
def set_range(self, _min, _max, dosignal=True):
self._min = _min
self._max = _max
if dosignal:
self.plot().emit(SIG_RANGE_CHANGED, self, self._min, self._max)
def move_shape(self, old_pos, new_pos):
dx = new_pos[0]-old_pos[0]
self._min += dx
self._max += dx
self.plot().emit(SIG_RANGE_CHANGED, self, self._min, self._max)
self.plot().replot()
def get_item_parameters(self, itemparams):
self.shapeparam.update_param(self)
itemparams.add("ShapeParam", self, self.shapeparam)
def set_item_parameters(self, itemparams):
update_dataset(self.shapeparam, itemparams.get("ShapeParam"),
visible_only=True)
self.shapeparam.update_range(self)
self.sel_brush = QBrush(self.brush)
assert_interfaces_valid(XRangeSelection)