Selecting a line

Selecting a line
 1# this example creates a rectangle in the active block and selects the top and
 2# bottom lines of the rectangle
 3
 4# check there is an active drawing
 5if impact.active_drawing.isNone():
 6
 7    # display a message in the output toolbox
 8    impact.gui.output_toolbox.add("Unable to continue: there is no active drawing")
 9
10else:
11
12    # create a local variable for the active block
13    ab = impact.active_drawing.active_layer.active_block
14
15    # move to the origin in the active block
16    ab.move_ad(0, 0)
17
18    # create a local variable for the rectangle size
19    rectangle_size = 100
20
21    # create a line
22    line1 = ab.lined(rectangle_size, 0)
23    line2 = ab.lined(0, rectangle_size)
24    line3 = ab.lined(-rectangle_size, 0)
25    line4 = ab.lined(0, -rectangle_size)
26
27    # check the lines were created
28    if not line1.isNone() and not line2.isNone() and not line3.isNone() and not line4.isNone():
29
30        # ensure that all the lines are deselected (auto select may be on)
31        line1.selected = 0
32        line2.selected = 0
33        line3.selected = 0
34        line4.selected = 0
35
36        # Create two vectors that will represent a line that intersects the top
37        # and bottom lines of the rectangle created
38
39        start_point = line1.get_along(0.5)  # the mid point of the bottom line
40        end_point = line3.get_along(0.5)  # the mid point of the top line
41
42        # Select the top and bottom lines of the rectangle
43        ab.select_by_lined(start_point.x, start_point.y, end_point.x, end_point.y)
44