本文整理汇总了Python中gaphas.canvas.Canvas.get_connection方法的典型用法代码示例。如果您正苦于以下问题：Python Canvas.get_connection方法的具体用法？Python Canvas.get_connection怎么用？Python Canvas.get_connection使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类gaphas.canvas.Canvas的用法示例。
在下文中一共展示了Canvas.get_connection方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: testUndoOnDeletedElement
# 需要导入模块: from gaphas.canvas import Canvas [as 别名]
# 或者: from gaphas.canvas.Canvas import get_connection [as 别名]
def testUndoOnDeletedElement(self):
b1 = Box()
b2 = Box()
line = Line()
canvas = Canvas()
canvas.add(b1)
self.assertEquals(6, len(canvas.solver.constraints))
canvas.add(b2)
self.assertEquals(12, len(canvas.solver.constraints))
canvas.add(line)
sink = ConnectionSink(b1, b1.ports()[0])
connector = Connector(line, line.handles()[0])
connector.connect(sink)
sink = ConnectionSink(b2, b2.ports()[0])
connector = Connector(line, line.handles()[-1])
connector.connect(sink)
self.assertEquals(14, len(canvas.solver.constraints))
self.assertEquals(2, len(list(canvas.get_connections(item=line))))
del undo_list[:]
# Here disconnect is not invoked!
canvas.remove(b2)
self.assertEquals(7, len(canvas.solver.constraints))
self.assertEquals(1, len(list(canvas.get_connections(item=line))))
cinfo = canvas.get_connection(line.handles()[0])
self.assertEquals(b1, cinfo.connected)
cinfo = canvas.get_connection(line.handles()[-1])
self.assertEquals(None, cinfo)
self.assertEquals([], list(canvas.solver.constraints_with_variable(line.handles()[-1].pos.x)))
self.assertEquals([], list(canvas.solver.constraints_with_variable(line.handles()[-1].pos.y)))
undo()
self.assertEquals(14, len(canvas.solver.constraints))
self.assertEquals(2, len(list(canvas.get_connections(item=line))))
cinfo = canvas.get_connection(line.handles()[0])
self.assertEquals(b1, cinfo.connected)
cinfo = canvas.get_connection(line.handles()[-1])
self.assertEquals(b2, cinfo.connected)示例2: test_undo_on_delete_element
# 需要导入模块: from gaphas.canvas import Canvas [as 别名]
# 或者: from gaphas.canvas.Canvas import get_connection [as 别名]
def test_undo_on_delete_element(revert_undo, undo_fixture):
b1 = Box()
b2 = Box()
line = Line()
canvas = Canvas()
canvas.add(b1)
assert 2 == len(canvas.solver.constraints)
canvas.add(b2)
assert 4 == len(canvas.solver.constraints)
canvas.add(line)
sink = ConnectionSink(b1, b1.ports()[0])
connector = Connector(line, line.handles()[0])
connector.connect(sink)
sink = ConnectionSink(b2, b2.ports()[0])
connector = Connector(line, line.handles()[-1])
connector.connect(sink)
assert 6 == len(canvas.solver.constraints)
assert 2 == len(list(canvas.get_connections(item=line)))
del undo_fixture[2][:] # Clear undo_list
# Here disconnect is not invoked!
canvas.remove(b2)
assert 3 == len(canvas.solver.constraints)
assert 1 == len(list(canvas.get_connections(item=line)))
cinfo = canvas.get_connection(line.handles()[0])
assert b1 == cinfo.connected
cinfo = canvas.get_connection(line.handles()[-1])
assert cinfo is None
assert [] == list(canvas.solver.constraints_with_variable(line.handles()[-1].pos.x))
assert [] == list(canvas.solver.constraints_with_variable(line.handles()[-1].pos.y))
undo_fixture[0]() # Call undo
assert 6 == len(canvas.solver.constraints)
assert 2 == len(list(canvas.get_connections(item=line)))
cinfo = canvas.get_connection(line.handles()[0])
assert b1 == cinfo.connected
cinfo = canvas.get_connection(line.handles()[-1])
assert b2 == cinfo.connected示例3: test_remove_connected_item
# 需要导入模块: from gaphas.canvas import Canvas [as 别名]
# 或者: from gaphas.canvas.Canvas import get_connection [as 别名]
def test_remove_connected_item(self):
"""Test adding canvas constraint"""
canvas = Canvas()
from gaphas.aspect import Connector, ConnectionSink
l1 = Line()
canvas.add(l1)
b1 = Box()
canvas.add(b1)
number_cons1 = len(canvas.solver.constraints)
b2 = Box()
canvas.add(b2)
number_cons2 = len(canvas.solver.constraints)
conn = Connector(l1, l1.handles()[0])
sink = ConnectionSink(b1, b1.ports()[0])
conn.connect(sink)
assert canvas.get_connection(l1.handles()[0])
conn = Connector(l1, l1.handles()[1])
sink = ConnectionSink(b2, b2.ports()[0])
conn.connect(sink)
assert canvas.get_connection(l1.handles()[1])
self.assertEquals(number_cons2 + 2, len(canvas.solver.constraints))
canvas.remove(b1)
# Expecting a class + line connected at one end only
self.assertEquals(number_cons1 + 1, len(canvas.solver.constraints))