# encoding: UTF-8

# KLayout Layout Viewer
# Copyright (C) 2006-2024 Matthias Koefferlein
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

if !$:.member?(File::dirname($0))
  $:.push(File::dirname($0))
end

load("test_prologue.rb")

# an event filter class

# don't create a class twice since the alias orgEventFilter will 
# refer to itself
if !Object.const_defined?("EventFilter")

  class EventFilter < RBA::QObject

    alias orgEventFilter eventFilter

    def initialize 
      @log = []
    end

    def log
      @log
    end

    def eventFilter(obj, event)
      @log << (event.class.to_s + ": " + event.type.inspect)
      self.orgEventFilter(obj, event)
    end

  end

  # implementation

  class MyAction < RBA::QAction

    def initialize(p, n)
      super(p)
      self.objectName = n
      @ce = nil
    end

    def childEvent(ev)
      if @ce
        @ce.call(ev)
      end
    end
    
    def on_child_event(&ce)
      @ce = ce
    end
    
  end

  class MyObject < RBA::QObject

    def initialize
      @ef = nil
      super(nil)
    end

    alias baseEventFilter eventFilter
      
    def eventFilter(watched, event)
      if @ef.call(watched, event)
        return true
      end
      baseEventFilter(watched, event)
    end

    def on_event_filter(&ef)
      @ef = ef
    end
    
  end
  
  class MyStandardItemModel < RBA::QStandardItemModel

    def srn(rn)
      if self.respond_to?(:setRoleNames, true)
        self.setRoleNames(rn)
      else
        self.setItemRoleNames(rn)
      end
    end

  end

end

class QtBinding_TestClass < TestBase

  def test_00

    # initial test 

  end

  def test_10

    a = MyAction.new(nil, "a")
    a.text = "mytext"
    a.checkable = true
    assert_equal(a.isChecked, false)
    a.checked = true
    assert_equal(a.text, "mytext")
    assert_equal(a.objectName, "a")
    a.text += "."
    assert_equal(a.text, "mytext.")
    assert_equal(a.isChecked, true)

    t = ""
    a.triggered do |checked|
      t += "[#{checked}]";
    end
    assert_equal(t, "")
    a.trigger # also toggles checked state
    assert_equal(t, "[false]")
    t = ""
    a.trigger # also toggles checked state
    assert_equal(t, "[true]")

    #  force GC and destruction
    a = nil
    GC.start
    a = MyAction.new(nil, "anew")
    assert_equal(a.objectName, "anew")
    a = nil
    GC.start

  end

  def test_11

    a = RBA::QAction.new(nil)
    aa = MyAction.new(a, "aa")
    assert_equal(aa.objectName, "aa")

    # destroying a will also destroy aa
    a.destroy
    assert_equal(a._destroyed?, true)
    assert_equal(aa._destroyed?, true)

  end

  def test_12

    a = RBA::QAction.new(nil)
    aa = RBA::QAction.new(a)
    aa.objectName = "aa"

    # destroying in the GC will also destroy aa
    a = nil
    GC.start
    a = RBA::QAction.new(nil)
    a = nil
    GC.start

    assert_equal(aa._destroyed?, true)

  end

  def test_13

    a = RBA::QAction.new(nil)
    aa = RBA::QAction.new(a)
    aa.objectName = "aa"
    aa.text = "aatext"

    cc = []
    a.children.each do |c|
      cc.push(c.objectName)
    end
    assert_equal(cc.join(","), "aa")

    # aa now is kept by a
    aa = nil
    GC.start
    aa = RBA::QAction.new(nil)
    aa = nil
    GC.start

    # fetch aa again
    a.children.each do |c|
      if c.objectName == "aa"
        aa = c
      end
    end
    assert_equal(aa != nil, true)
    assert_equal(aa.class.to_s, "RBA::QAction")
    assert_equal(aa.text, "aatext")
    assert_equal(aa._destroyed?, false)

  end

  def test_20

    no_event = false

    x = []
    ef = MyObject.new
    ef.on_event_filter do |watched,event|
      x.push(watched.inspect + ":" + event.inspect)
      no_event
    end

    ce_log = []
    a = MyAction.new(nil, "a")
    a.on_child_event do |ce|
      ce_log.push("#{ce.added}:#{ce.child.objectName}")
    end

    a.installEventFilter(ef)

    aa = MyAction.new(nil, "aa1")
    assert_equal(ce_log.join(","), "")
    aa.setParent(a)
    assert_equal(ce_log.join(","), "true:aa1")
    ce_log = []

    # destroy aa
    aa.destroy
    aa = nil
    assert_equal(ce_log.join(","), "false:aa1")
    ce_log = []

    no_event = true
    aa = MyAction.new(nil, "aa2")
    aa.setParent(a)
    assert_equal(ce_log.join(","), "")
    ce_log = []

    no_event = false
    aa.destroy
    aa = nil
    assert_equal(ce_log.join(","), "false:aa2")
    ce_log = []

  end

  def test_30

    # dialog construction, cleanup, object dependency ...

    mw = nil # more fun than with RBA::Application::instance.main_window because Ruby's GC does all the cleanup

    dialog = RBA::QDialog::new(mw)
    label = RBA::QLabel::new(dialog)
    layout = RBA::QHBoxLayout::new(dialog)
    layout.addWidget(label)
    GC.start

    dialog = RBA::QDialog::new(mw)
    label = RBA::QLabel::new(dialog)
    layout = RBA::QHBoxLayout::new(dialog)
    layout.addWidget(label)
    label._destroy
    GC.start

    dialog = RBA::QDialog::new(mw)
    label = RBA::QLabel::new(dialog)
    layout = RBA::QHBoxLayout::new(dialog)
    layout.addWidget(label)
    layout._destroy
    GC.start

    dialog = RBA::QDialog::new(mw)
    label = RBA::QLabel::new(dialog)
    layout = RBA::QHBoxLayout::new(dialog)
    layout.addWidget(label)
    dialog._destroy
    GC.start

    dialog = RBA::QDialog::new(mw)
    label = RBA::QLabel::new(dialog)
    layout = RBA::QHBoxLayout::new(dialog)
    layout.addWidget(label)
    GC.start

  end

  def test_31

    # Optional arguments, enums, QFlag's

    mw = nil # more fun than with RBA::Application::instance.main_window because Ruby's GC does all the cleanup

    mb = RBA::QMessageBox::new(RBA::QMessageBox::Critical, "title", "text")
    assert_equal(mb.icon.to_i != RBA::QMessageBox::Warning.to_i, true)
    assert_equal(mb.icon.to_i == RBA::QMessageBox::Critical.to_i, true)
    assert_equal(mb.standardButtons.to_i == RBA::QMessageBox::NoButton.to_i, true)

    mb = RBA::QMessageBox::new(RBA::QMessageBox::Critical, "title", "text", RBA::QMessageBox::Ok)
    assert_equal(mb.standardButtons.to_i == RBA::QMessageBox::Ok.to_i, true)

    mb = RBA::QMessageBox::new(RBA::QMessageBox::Critical, "title", "text", RBA::QMessageBox::Ok | RBA::QMessageBox::Cancel)
    assert_equal(mb.standardButtons.to_i == RBA::QMessageBox::Ok.to_i + RBA::QMessageBox::Cancel.to_i, true)

  end

  def test_40

    # Lifetime management of objects/methods not using QObject::parent
    # QTreeWidget (parent)/QTreeWidgetItem (child)

    # constructor with parent-like argument:
    tw = RBA::QTreeWidget::new
    ti = RBA::QTreeWidgetItem::new(tw)
    # strange, but true:
    assert_equal(ti.parent, nil)
    assert_equal(tw.topLevelItemCount, 1)
    ti = nil
    # force delete of the ti item unless it's referenced
    # NOTE: it's not sufficient to just set ti to nil, we also
    # have to create a new QTreeWidgetItem (special for Ruby >1.9?)
    ti = RBA::QTreeWidgetItem::new
    GC.start
    # gives 1, because the tree widget item is kept by
    # the tree widget:
    assert_equal(tw.topLevelItemCount, 1)

    # the tree item belongs to the widget, hence it's destroyed with
    # the widget
    ti = tw.topLevelItem(0)
    tw._destroy
    # gives true, because tw owns ti too.
    assert_equal(ti._destroyed?, true)

    # The same works for insert too
    tw = RBA::QTreeWidget::new
    ti = RBA::QTreeWidgetItem::new
    tw.insertTopLevelItem(0, ti)
    assert_equal(tw.topLevelItemCount, 1)
    ti = nil
    # force delete of the ti item unless it's referenced
    ti = RBA::QTreeWidgetItem::new
    GC.start
    # gives 1, because the tree widget item is kept by
    # the tree widget:
    assert_equal(tw.topLevelItemCount, 1)

    # the tree item belongs to the widget, hence it's destroyed with
    # the widget
    ti = tw.topLevelItem(0)
    tw._destroy
    # gives true, because tw owns ti
    assert_equal(ti._destroyed?, true)

    # And add:
    tw = RBA::QTreeWidget::new
    ti = RBA::QTreeWidgetItem::new
    tw.addTopLevelItem(ti)
    assert_equal(tw.topLevelItemCount, 1)
    ti = nil
    # force delete of the ti item unless it's referenced
    ti = RBA::QTreeWidgetItem::new
    GC.start
    # gives 1, because the tree widget item is kept by
    # the tree widget:
    assert_equal(tw.topLevelItemCount, 1)

    # the tree item belongs to the widget, hence it's destroyed with
    # the widget
    ti = tw.topLevelItem(0)
    tw._destroy
    # gives true, because tw owns ti
    assert_equal(ti._destroyed?, true)

    # But the item is released when we take it and add:
    tw = RBA::QTreeWidget::new
    ti = RBA::QTreeWidgetItem::new
    tw.addTopLevelItem(ti)
    assert_equal(tw.topLevelItemCount, 1)
    ti = nil
    # force delete of the ti item unless it's referenced
    ti = RBA::QTreeWidgetItem::new
    GC.start
    # gives 1, because the tree widget item is kept by
    # the tree widget:
    assert_equal(tw.topLevelItemCount, 1)

    ti = tw.takeTopLevelItem(0)
    tw._destroy
    # gives false, because we took ti and tw no longer owns it
    assert_equal(ti._destroyed?, false)

    # And we can destroy a child too
    tw = RBA::QTreeWidget::new
    ti = RBA::QTreeWidgetItem::new
    tw.addTopLevelItem(ti)
    assert_equal(tw.topLevelItemCount, 1)
    ti._destroy
    assert_equal(tw.topLevelItemCount, 0)

  end

  def test_41

    # Lifetime management of objects/methods not using QObject::parent
    # QTreeWidgetItem (parent)/QTreeWidgetItem (child)

    # constructor with parent-like argument (supported by QObject parent/child relationship):
    tw = RBA::QTreeWidgetItem::new
    ti = RBA::QTreeWidgetItem::new(tw)
    # that's not QObject::parent - this one still is 0 (not seen by RBA)
    assert_equal(ti.parent, tw)
    assert_equal(tw.childCount, 1)
    ti = nil
    # force delete of the ti item unless it's referenced
    # NOTE: it's not sufficient to just set ti to nil, we also
    # have to create a new QTreeWidgetItem (special for Ruby >1.9?)
    ti = RBA::QTreeWidgetItem::new
    GC.start
    # gives 1, because the tree widget item is kept by
    # the tree widget:
    assert_equal(tw.childCount, 1)

    # the tree item belongs to the widget, hence it's destroyed with
    # the widget
    ti = tw.child(0)
    tw._destroy
    # gives true, because tw owns ti too.
    assert_equal(ti._destroyed?, true)

    # The same works for insert too
    tw = RBA::QTreeWidgetItem::new
    ti = RBA::QTreeWidgetItem::new
    tw.insertChild(0, ti)
    assert_equal(tw.childCount, 1)
    ti = nil
    # force delete of the ti item unless it's referenced
    ti = RBA::QTreeWidgetItem::new
    GC.start
    # gives 1, because the tree widget item is kept by
    # the tree widget:
    assert_equal(tw.childCount, 1)

    # the tree item belongs to the widget, hence it's destroyed with
    # the widget
    ti = tw.child(0)
    tw._destroy
    # gives true, because tw owns ti
    assert_equal(ti._destroyed?, true)

    # And add:
    tw = RBA::QTreeWidgetItem::new
    ti = RBA::QTreeWidgetItem::new
    tw.addChild(ti)
    assert_equal(tw.childCount, 1)
    ti = nil
    # force delete of the ti item unless it's referenced
    ti = RBA::QTreeWidgetItem::new
    GC.start
    # gives 1, because the tree widget item is kept by
    # the tree widget:
    assert_equal(tw.childCount, 1)

    # the tree item belongs to the widget, hence it's destroyed with
    # the widget
    ti = tw.child(0)
    tw._destroy
    # gives true, because tw owns ti
    assert_equal(ti._destroyed?, true)

    # But the item is released when we take it and add:
    tw = RBA::QTreeWidgetItem::new
    ti = RBA::QTreeWidgetItem::new
    tw.addChild(ti)
    assert_equal(tw.childCount, 1)
    ti = nil
    # force delete of the ti item unless it's referenced
    ti = RBA::QTreeWidgetItem::new
    GC.start
    # gives 1, because the tree widget item is kept by
    # the tree widget:
    assert_equal(tw.childCount, 1)

    ti = tw.takeChild(0)
    tw._destroy
    # gives false, because we took ti and tw no longer owns it
    assert_equal(ti._destroyed?, false)

    # And we can destroy a child too
    tw = RBA::QTreeWidgetItem::new
    ti = RBA::QTreeWidgetItem::new
    tw.addChild(ti)
    assert_equal(tw.childCount, 1)
    ti._destroy
    assert_equal(tw.childCount, 0)

  end

  def test_42

    # QKeyEvent and related issues

    ef = EventFilter::new

    widget = RBA::QLineEdit::new
    widget.setText("ABC")

    RBA::QApplication::processEvents

    widget.installEventFilter(ef)

    ke = RBA::QKeyEvent::new(RBA::QEvent::KeyPress, RBA::Qt::Key_O.to_i, RBA::Qt::ShiftModifier, "O")
    RBA::QCoreApplication::postEvent(widget, ke)

    ke = RBA::QKeyEvent::new(RBA::QEvent::KeyPress, RBA::Qt::Key_Left.to_i, RBA::Qt::NoModifier)
    RBA::QCoreApplication::postEvent(widget, ke)

    ke = RBA::QKeyEvent::new(RBA::QEvent::KeyPress, RBA::Qt::Key_P.to_i, RBA::Qt::NoModifier, "p")
    RBA::QCoreApplication::postEvent(widget, ke)

    RBA::QApplication::processEvents

    GC.start

    assert_equal(ef.log.select { |s| s !~ /RBA::QKeyEvent(_Native)?: ShortcutOverride/ && s !~ /RBA::QEvent(_Native)/ }.join("\n"), "RBA::QKeyEvent: KeyPress (6)\nRBA::QKeyEvent: KeyPress (6)\nRBA::QKeyEvent: KeyPress (6)")

    ef = nil
    ef = EventFilter::new
    GC.start

    assert_equal(widget.text, "ABCpO")
    ef = nil
    widget = nil
    GC.start

  end

  def test_43

    # QHash bindings 

    slm = MyStandardItemModel::new
    rn = slm.roleNames
    assert_equal(rn.keys.sort.collect { |k| "#{k}=>\"#{rn[k]}\"" }.join(", "), "0=>\"display\", 1=>\"decoration\", 2=>\"edit\", 3=>\"toolTip\", 4=>\"statusTip\", 5=>\"whatsThis\"")
    rn[7] = "blabla"
    slm.srn(rn)
    rn = slm.roleNames
    assert_equal(rn.keys.sort.collect { |k| "#{k}=>\"#{rn[k]}\"" }.join(", "), "0=>\"display\", 1=>\"decoration\", 2=>\"edit\", 3=>\"toolTip\", 4=>\"statusTip\", 5=>\"whatsThis\", 7=>\"blabla\"")

  end

  def test_44

    # Ability to monitor native child objects

    parent = RBA::QScrollArea::new
    parent.show  # this makes resize actually change the widget's size
    child = parent.viewport

    # ensure parent and child are working
    assert_equal(child._destroyed?, false)

    parent.resize(200, 200)
    assert_equal(child.width() > 100, true)
    assert_equal(child.height() > 100, true)
    
    parent.resize(100, 100)
    assert_equal(child.width() <= 100, true)
    assert_equal(child.height() <= 100, true)

    # now if we delete the parent, the child needs to become disconnected

    parent._destroy()
    assert_equal(parent._destroyed?, true)
    assert_equal(child._destroyed?, true)

  end

  def test_45

    # Ability to connect to signals while ignoring arguments and 
    # to emit signals

    b = RBA::QPushButton::new

    triggered = ""
    b.clicked { |checked| triggered += (checked ? "1" : "0") }

    assert_equal(triggered, "")
    b.emit_clicked(true)
    assert_equal(triggered, "1")
    b.emit_clicked(false)
    assert_equal(triggered, "10")

    b.clicked { triggered += "*" }

    b.emit_clicked(true)
    assert_equal(triggered, "10*")
    b.emit_clicked(false)
    assert_equal(triggered, "10**")

  end

  def test_46

    # Layout becomes owned by widget

    w = RBA::QWidget::new

    l = RBA::QHBoxLayout::new
    w.setLayout(l)

    w._destroy
    assert_equal(l._destroyed?, true)

  end

  def test_47

    # setParent will attach ownership for QWidget

    w = RBA::QWidget::new
    wc = RBA::QWidget::new

    wc.setParent(w)

    w._destroy
    assert_equal(wc._destroyed?, true)

  end

  def test_48

    # setParent will attach ownership for QObject

    w = RBA::QObject::new
    wc = RBA::QObject::new

    wc.setParent(w)

    w._destroy
    assert_equal(wc._destroyed?, true)

  end

  def test_49

    # setParent to nil will release ownership for QObject

    w = RBA::QObject::new
    wc = RBA::QObject::new

    wc.setParent(w)
    assert_equal(wc.parent == w, true)
    wc.setParent(nil)

    w._destroy
    assert_equal(wc._destroyed?, false)
    wc._destroy
    assert_equal(wc._destroyed?, true)

  end

  def test_50

    # QObject signals

    w = RBA::QObject::new

    if w.respond_to?(:objectNameChanged)   # Qt5

      on = nil
      w.objectNameChanged do |name|
        on = name
      end

      w.objectName = "uvw"
      assert_equal(on, "uvw")

    end

    od = false
    w.destroyed do |name|
      od = true
    end

    w._destroy
    assert_equal(od, true)

  end

  def test_51

    # issue #707 (QJsonValue constructor ambiguous)
    if RBA.const_defined?("QJsonValue")

      v = RBA::QJsonValue::new("hello")
      assert_equal(v.toString, "hello")
      assert_equal(v.toVariant, "hello")
      assert_equal(v.toInt, 0)

      v = RBA::QJsonValue::new(17)
      assert_equal(v.toString, "")
      assert_equal(v.toVariant, 17)
      assert_equal(v.toInt, 17)

      v = RBA::QJsonValue::new(2.5)
      assert_equal(v.toString, "")
      assert_equal(v.toVariant, 2.5)
      assert_equal(v.toDouble, 2.5)

      v = RBA::QJsonValue::new(true)
      assert_equal(v.toString, "")
      assert_equal(v.toVariant, true)
      assert_equal(v.toBool, true)

    end

  end

  def test_52

    # issue #708 (Image serialization to QByteArray)
    img = RBA::QImage::new(10, 10, RBA::QImage::Format_Mono)
    img.fill(0)

    buf = RBA::QBuffer::new
    img.save(buf, "PNG")

    assert_equal(buf.data.size > 100, true)
    assert_equal(buf.data[0..7].unpack("C*"), [0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a])

  end

  def test_53

    # issue #771 (QMimeData not working)

    mimeData = RBA::QMimeData::new
    mimeData.setData("application/json", '{"test":"test"}')
    jsonData = mimeData.data("application/json");
    assert_equal(jsonData.to_s, '{"test":"test"}')

  end

  def test_54

    # issue #1029 (Crash for QBrush passed to setData)

    item = RBA::QTreeWidgetItem::new
    item.setBackground(0, RBA::QBrush::new(RBA::QColor::new(0xFF, 0xFF, 0x00)))
    assert_equal(item.background(0).color.red, 255)
    assert_equal(item.background(0).color.green, 255)
    assert_equal(item.background(0).color.blue, 0)

  end

  def test_55

    # addWidget to QHBoxLayout keeps object managed
    window = RBA::QDialog::new
    layout = RBA::QHBoxLayout::new(window)

    w = RBA::QPushButton::new
    oid = w.object_id
    layout.addWidget(w)
    assert_equal(layout.itemAt(0).widget.object_id, oid)

    # try to kill the object
    w = nil
    GC.start

    # still there
    w = layout.itemAt(0).widget
    assert_equal(w._destroyed?, false)
    assert_equal(w.object_id, oid)

    # killing the window kills the layout kills the widget
    window._destroy
    assert_equal(window._destroyed?, true)
    assert_equal(layout._destroyed?, true)
    assert_equal(w._destroyed?, true)

  end

  def test_56

    # Creating QImage from binary data

    bytes = [ 0x01, 0x02, 0x03, 0x04, 0x11, 0x12, 0x13, 0x14, 0x21, 0x22, 0x33, 0x34,
              0x31, 0x32, 0x33, 0x34, 0x41, 0x42, 0x43, 0x44, 0x51, 0x52, 0x53, 0x54,
              0x61, 0x62, 0x63, 0x64, 0x71, 0x72, 0x73, 0x74, 0x81, 0x82, 0x83, 0x84,
              0x91, 0x92, 0x93, 0x94, 0xa1, 0xa2, 0xa3, 0xa4, 0xb1, 0xb2, 0xb3, 0xb4 ].pack("C*")

    image = RBA::QImage::new(bytes, 3, 4, RBA::QImage::Format_ARGB32)
    assert_equal("%08x" % image.pixel(0, 0), "04030201")
    assert_equal("%08x" % image.pixel(1, 0), "14131211")
    assert_equal("%08x" % image.pixel(0, 2), "64636261")

  end

  def test_57

    # QColor with string parameter (suppressing QLatin1String)

    color = RBA::QColor::new("blue")
    assert_equal(color.name(), "#0000ff")

  end

  def test_58

    # The various ways to refer to enums

    assert_equal(RBA::Qt::MouseButton::new(4).to_i, 4)
    assert_equal(RBA::Qt_MouseButton::new(4).to_i, 4)
    assert_equal(RBA::Qt_MouseButton::new(4).hash, 4)
    assert_equal(RBA::Qt_MouseButton::new(1).to_s, "LeftButton")
    assert_equal(RBA::Qt_MouseButton::LeftButton.to_i, 1)
    assert_equal(RBA::Qt::LeftButton.to_i, 1)
    assert_equal((RBA::Qt_MouseButton::LeftButton | RBA::Qt_MouseButton::RightButton).to_i, 3)
    assert_equal((RBA::Qt_MouseButton::LeftButton | RBA::Qt_MouseButton::RightButton).class.to_s, "RBA::Qt_QFlags_MouseButton")
    assert_equal((RBA::Qt::MouseButton::LeftButton | RBA::Qt::MouseButton::RightButton).to_i, 3)
    assert_equal((RBA::Qt::MouseButton::LeftButton | RBA::Qt::MouseButton::RightButton).class.to_s, "RBA::Qt_QFlags_MouseButton")
    assert_equal((RBA::Qt::LeftButton | RBA::Qt::RightButton).to_i, 3)
    assert_equal((RBA::Qt::LeftButton | RBA::Qt::RightButton).class.to_s, "RBA::Qt_QFlags_MouseButton")

  end

  def test_59

    # Enums can act as hash keys

    h = {}
    h[RBA::Qt::MouseButton::LeftButton] = "left"
    h[RBA::Qt::MouseButton::RightButton] = "right"
    assert_equal(h[RBA::Qt::MouseButton::LeftButton], "left")
    assert_equal(h[RBA::Qt::MouseButton::RightButton], "right")
    assert_equal(h[RBA::Qt::MouseButton::NoButton], nil)

  end

  def test_60

    # findChild, findChildren

    w = RBA::QWidget::new
    w.objectName = "w"
    w1 = RBA::QWidget::new(w)
    w1.objectName = "w1"
    w2 = RBA::QWidget::new(w1)
    w2.objectName = "w2"

    assert_equal(w.findChild.objectName, "w1")
    assert_equal(w.findChild("w2").objectName, "w2")

    assert_equal(w.findChildren().collect { |c| c.objectName }.join(","), "w1,w2")
    assert_equal(w.findChildren("w2").collect { |c| c.objectName }.join(","), "w2")

    begin
      # Qt5++
      re_cls = RBA::QRegularExpression
    rescue => ex
      # Qt4
      re_cls = RBA::QRegExp
    end
    assert_equal(w.findChildren(re_cls::new("^.2$")).collect { |c| c.objectName }.join(","), "w2")
    assert_equal(w.findChildren(re_cls::new("^w.$")).collect { |c| c.objectName }.join(","), "w1,w2")

  end

end 

load("test_epilogue.rb")