from PyQt5.Qt import *
from PyQt5.Qsci import QsciScintilla
from pathlib import Path

if __name__ == '__main__':
    app = QApplication([])

    view = QsciScintilla()
    view.setText(Path(__file__).read_text())

    # Multiselection
    view.SendScintilla(view.SCI_SETMULTIPLESELECTION, True)
    view.SendScintilla(view.SCI_SETMULTIPASTE, 1)
    view.SendScintilla(view.SCI_SETADDITIONALSELECTIONTYPING, True)

    # Main/Additional selection coloring
    SC_ALPHA_NOALPHA = 256
    view.SendScintilla(view.SCI_SETSELFORE, 0)
    view.SendScintilla(view.SCI_SETSELBACK, 1, QColor("#0000F0"))
    view.SendScintilla(view.SCI_SETSELALPHA, SC_ALPHA_NOALPHA)
    view.SendScintilla(view.SCI_SETADDITIONALSELBACK, QColor("#00F000"))
    view.SendScintilla(view.SCI_SETADDITIONALSELALPHA, SC_ALPHA_NOALPHA)

    view.resize(800, 600)
    view.show()
    app.exec_()