def create_base_tab(self, tab):
self.base = Base()
# List of (unit, label)-pairs to build our grid from.
bases = (2, 3, 5, 8, 10, 12, 16, 20, 32, 36, 60, 64)
units = [(i, str(i)) for i in bases]
grid, self.base_edits = self.create_grid(units, 6)
colors = self.create_color_layout()
# Patch it all together in a vertical layout.
layout = QtGui.QVBoxLayout(tab)
layout.addLayout(colors)
layout.addLayout(grid)
# Set the text alignment for the LineEdits and connect edits to actions.
for i in self.base_edits.values():
i.setAlignment(QtCore.Qt.AlignRight)
i.textEdited[str].connect(self.base_text_changed)
i.textEdited[str].connect(self.update_base_edits)
