How to show and hide all polygons on a given layer?

nmz787_intel

Hoping someone might have some code to share. I will post my findings here.

nmz787_intel

This code manages to unselect all selected polygons... but I haven't figured out how to hide them yet:

import pya
print('\n\nStarting KLayout Script')
lv = pya.LayoutView.current()
currently_selected_polygons = lv.object_selection  # list of ObjectInstPath

if not currently_selected_polygons :
  print('no polygons selected in KLayout window')
else:
  #print(dir(currently_selected_polygons[0]))
  pass

for o in currently_selected_polygons:
  if (o.shape.polygon.is_box()):
    # currently let us ignore non-box shapes
    bb = o.shape.polygon.bbox()
    ll, ur = bb.p1, bb.p2
    print(f'Selected rect width({(ur.x - ll.x)}, height {(ur.y - ll.y)})')
    lv.unselect_object(o)
    # lv.select_object(o)  # you can also immediately select it again too, just to prove the concept

nmz787_intel

This code manages to select all shapes on a given layer... I haven't figured out how to show them yet, though (and hide all others):

import pya
print('\n\nStarting KLayout Script')
lv = pya.LayoutView.current()
cv = pya.CellView.active()
layout =pya.CellView.active().layout()

shapes = {}
layer_name_to_layer_index = {}
for layer in lv.each_layer():
  l= layout.find_layer(None, None, layer.name)
  layer_index = layer.layer_index()
  layer_name_to_layer_index[layer.name] = layer_index

  # ignore/filter-out some layers based on name
  if 'm0' in layer.name and 'drawing' in layer.name:
    print(layer.name)
    shapes[layer.name] = []
    for c in layout.each_cell():
      iter = layout.begin_shapes(c, layer_index)
      while not iter.at_end():
        shapes[layer.name].append(iter.shape())
        if iter.shape().is_polygon():
          # I never seem to get in here... not sure why, as later on the code DOES successfully select these shapes
          polygon = iter.shape().polygon.transformed(iter.trans())
          print("In cell " + iter.cell().name + ": " + polygon.to_s())
        iter.next()


selections = []
for layer_name in shapes:
  print(f'about to select all shapes in layer ({layer_name})')
  layer_index = layer_name_to_layer_index[layer_name]
  for p in shapes[layer_name]:
    selection = pya.ObjectInstPath()
    selection.layer = layer_index
    selection.cv_index = cv.index()
    selection.top = cv.cell_index
    selection.shape = p
    selections.append(selection)

# make the new shape list become selected
lv.object_selection = selections

EugeneZelenko

Hi!

If you want to hide entire layer content, you could find layer properties for given layer/datatype iterating LayoutView.begin_layers()/end_layers() and than set LayerProperties.visible to False.

nmz787_intel

Hi Eugene is begin_layers / end_layers different/better than for layer in lv.each_layer(): ? The latter feels more Pythonic, which is preferable.

EugeneZelenko

Hi!

I think LayoutView.each_layer should work for you. I used LayoutView.begin_layers because of more complicated situations like layer properties deletion.