layout_util.py
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33 # Author: Isaac Saito
34 
35 from python_qt_binding.QtCore import Qt
36 from python_qt_binding.QtWidgets import QWidgetItem, QSpacerItem
37 import roslib
38 import rospy
39 
40 
41 class LayoutUtil(object):
42 
43  @staticmethod
44  def alternate_color(list_widgets, colors_alter=[Qt.white, Qt.gray]):
45  """
46  Alternate the background color of the widgets that are ordered
47  linearly, by the given list of colors.
48 
49  Originally intended for the elements of QHBoxLayout & QVBoxLayout.
50 
51  @type list_widgets: QtGui.QWidget[]
52  @type colors_alter: QtCore.Qt.GlobalColor[]
53  @param colors_alter: 1st element is used as initial/default color.
54  @rtype: void
55 
56  @author: Isaac Saito
57  """
58 
59  colors_num = len(colors_alter)
60  i_widget = 0
61  for w in list_widgets:
62  w.setAutoFillBackground(True)
63  p = w.palette()
64 
65  divisor = (i_widget + colors_num) % colors_num
66  i_widget += 1
67 
68  rospy.logdebug('LayoutUtil divisor={} i_widget={} colors_num={}'.format(divisor,
69  i_widget,
70  colors_num))
71 
72  p.setColor(w.backgroundRole(), colors_alter[divisor])
73  w.setPalette(p)
74 
75  @staticmethod
76  def clear_layout(layout):
77  """
78  Clear all items in the given layout. Currently, only the instances of
79  QWidgetItem get cleared (ie. QSpaceItem is ignored).
80 
81  Originally taken from http://stackoverflow.com/a/9375273/577001
82 
83  :type layout: QLayout
84  """
85  for i in reversed(range(layout.count())):
86  item = layout.itemAt(i)
87 
88  if isinstance(item, QWidgetItem):
89  # print "widget" + str(item)
90  item.widget().close()
91  # or
92  # item.widget().setParent(None)
93  elif isinstance(item, QSpacerItem):
94  # print "spacer " + str(item)
95  continue
96  # no need to do extra stuff
97  else:
98  # print "layout " + str(item)
99  LayoutUtil.clear_layout(item.layout())
100 
101  # remove the item from layout
102  layout.removeItem(item)
def alternate_color(list_widgets, colors_alter=[Qt.white, Qt, gray)
Definition: layout_util.py:44


rqt_py_common
Author(s): Dorian Scholz, Isaac Saito, Dirk Thomas
autogenerated on Mon Mar 22 2021 02:13:26