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import logging
logger = logging.getLogger("panwid.datatable")
from datetime import datetime, date as datetype
from .common import *
class NoSuchColumnException(Exception):
pass
def make_value_function(template):
def inner(table, row):
pos = table.index_to_position(row.get(table.index))
return template.format(
data=row,
row=pos+1,
rows_loaded = len(table),
rows_total = table.query_result_count() if table.limit else "?"
)
return inner
class DataTableBaseColumn(object):
_width = ("weight", 1)
def __init__(
self,
padding = DEFAULT_CELL_PADDING,
hide=False,
width=None,
min_width=None,
attr = None
):
self.hide = hide
self.padding = padding
if isinstance(self.padding, tuple):
self.padding_left, self.padding_right = self.padding
else:
self.padding_left = self.padding_right = self.padding
if width is not None: self._width = width
self.min_width = min_width
self.attr = attr
if isinstance(self._width, tuple):
if self._width[0] != "weight":
raise Exception(
"Column width %s not supported" %(self._width[0])
)
self.initial_sizing, self.initial_width = self._width
self.min_width = 3 # FIXME
elif isinstance(self._width, int):
self.initial_sizing = "given"
self.initial_width = self._width
self.min_width = self.initial_width = self._width # assume starting width is minimum
else:
raise Exception(self._width)
self.sizing = self.initial_sizing
self.width = self.initial_width
def __repr__(self):
return f"<{self.__class__.__name__}: {self.name}>"
def width_with_padding(self, table_padding=None):
padding = 0
if self.padding is None and table_padding is not None:
padding = table_padding
return self.width + self.padding_left + self.padding_right
@property
def index(self):
return self.table.visible_columns.index(self)
@property
def header(self):
try:
return self.table.header.cells[self.index]
except ValueError:
return None
class DataTableColumn(DataTableBaseColumn):
def __init__(self, name,
label=None,
value=None,
align="left", wrap="space",
pack=False,
no_clip_header = False,
truncate=False,
format_fn=None,
decoration_fn=None,
format_record = None, # format_fn is passed full row data
sort_key = None, sort_reverse=False,
sort_icon = None,
footer_fn = None, footer_arg = "values", **kwargs):
super().__init__(**kwargs)
self.name = name
self.label = label if label is not None else name
if value:
if isinstance(value, str):
self.value_fn = make_value_function(value)
elif callable(value):
self.value_fn = value
else:
self.value_fn = None
self.align = align
self.pack = pack
self.wrap = wrap
self.no_clip_header = no_clip_header
self.truncate = truncate
self.format_fn = format_fn
self.decoration_fn = decoration_fn
self.format_record = format_record
self.sort_key = sort_key
self.sort_reverse = sort_reverse
self.sort_icon = sort_icon
self.footer_fn = footer_fn
self.footer_arg = footer_arg
logger.debug(f"column {self.name}, width: {self.sizing}, {self.width}")
@property
def contents_width(self):
try:
index = next(i for i, c
in enumerate(self.table.visible_columns)
if getattr(c, "name", None) == self.name)
except StopIteration:
raise Exception(self.name, [ c.name for c in self.table.visible_columns])
# logger.info(f"len: {len(self.table.body)}")
l = [
(
getattr(r.cells[index].value, "min_width", None)
or
len(str(r.cells[index].formatted_value))
) + self.padding*2
for r in (self.table.body)
] + [self.table.header.cells[index].min_width or 0] + [self.min_width or 0]
return max(l)
@property
def minimum_width(self):
# if self.sizing == "pack":
if self.pack:
# logger.info(f"min: {self.name}, {self.contents_width}")
return self.contents_width
else:
return self.min_width or len(self.label) + self.padding_left + self.padding_right + (1 if self.sort_icon else 0)
def _format(self, v):
# First, call the format function for the column, if there is one
if self.format_fn:
try:
v = self.format_fn(v)
except Exception as e:
logger.error("%s format exception: %s" %(self.name, v))
logger.exception(e)
raise e
return self.format(v)
def format(self, v):
# Do our best to make the value into something presentable
if v is None:
v = " "
elif isinstance(v, int):
v = "%d" %(v)
elif isinstance(v, float):
v = "%.03f" %(v)
elif isinstance(v, datetime):
v = v.strftime("%Y-%m-%d %H:%M:%S")
elif isinstance(v, datetype):
v = v.strftime("%Y-%m-%d")
return v
class DataTableDivider(DataTableBaseColumn):
_width = 1
def __init__(self, char=" ", in_header=False, in_footer=False, **kwargs):
super().__init__(**kwargs)
self.char = char
self.in_header = in_header
self.in_footer = in_footer
@property
def name(self):
return "divider"
@property
def value(self):
# FIXME: should use SolidFill for rows that span multiple screen rows
w = urwid.Divider(self.char)
return w
@property
def contents_width(self):
return len(self.char)
@property
def pack(self):
return False
@property
def align(self):
return "left"
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