added filtrable combobox widget

openpype/tools/project_manager/project_manager/widgets.py

@@ -0,0 +1,46 @@
+from Qt import QtWidgets, QtCore
+
+
+class FilterComboBox(QtWidgets.QComboBox):
+    def __init__(self, parent=None):
+        super(FilterComboBox, self).__init__(parent)
+
+        self.setFocusPolicy(QtCore.Qt.StrongFocus)
+        self.setEditable(True)
+
+        filter_proxy_model = QtCore.QSortFilterProxyModel(self)
+        filter_proxy_model.setFilterCaseSensitivity(QtCore.Qt.CaseInsensitive)
+        filter_proxy_model.setSourceModel(self.model())
+
+        completer = QtWidgets.QCompleter(filter_proxy_model, self)
+        completer.setCompletionMode(
+            QtWidgets.QCompleter.UnfilteredPopupCompletion
+        )
+        self.setCompleter(completer)
+
+        self.lineEdit().textEdited.connect(
+            filter_proxy_model.setFilterFixedString
+        )
+        completer.activated.connect(self.on_completer_activated)
+
+        self._completer = completer
+        self._filter_proxy_model = filter_proxy_model
+
+    def focusInEvent(self, event):
+        super(FilterComboBox, self).focusInEvent(event)
+        self.lineEdit().selectAll()
+
+    def on_completer_activated(self, text):
+        if text:
+            index = self.findText(text)
+            self.setCurrentIndex(index)
+
+    def setModel(self, model):
+        super(FilterComboBox, self).setModel(model)
+        self._filter_proxy_model.setSourceModel(model)
+        self._completer.setModel(self._filter_proxy_model)
+
+    def setModelColumn(self, column):
+        self._completer.setCompletionColumn(column)
+        self._filter_proxy_model.setFilterKeyColumn(column)
+        super(FilterComboBox, self).setModelColumn(column)