我在计算 FPDF 中多单元格的正确高度时遇到问题。pdf.ln()由于单元格中的内容溢出，我在使用时遇到了重叠问题。对于任何长度的字符串，我该怎么做才能动态解决这个问题？
itemname = "This is a thing this is a thing this is a thing"
lineheight = pdf.font_size * 2.5
pdf.multi_cell(col_width * 9, line_height, textname, border=0, align="L",ln=3, max_line_height=7)
pdf.ln()
pdf.multi_cell(col_width * 9, line_height, "Shipping Charges", border=0, align="L",ln=3, max_line_height=7)
这给出了如图所示的结果，如果我在商品名称中添加更多内容，包括运费、礼品包装和商品名称并放在上面
我采取了不同的方法。它涉及更多一点，但是您可以将每个单元格连续添加并让它占用它需要的空间。找到单元格的底部并跟踪它。当您将单元格添加到该行时，找出哪个是最低的，然后在该位置开始下一行。这样，下一行将足够远以容纳前一行中最高的单元格。
修改Bvalgard 的代码（大多数情况下，我用我的 add_cell 函数替换了 multi_cell 并随时跟踪最低点）：
def add_cell(pdf, width, line_height, content, border, align, lowest_point, highest_point):
pdf.multi_cell(width, line_height, content, border=border, align=align, ln=0, max_line_height=pdf.font_size*1.25)
current_x = pdf.get_x()
current_y = pdf.get_y()
if current_y > lowest_point:
lowest_point = current_y
print("new lowest point:", lowest_point)
pdf.set_xy(current_x, highest_point)
print("row x", pdf.get_x(), "row y", pdf.get_y())
return lowest_point
def create_table(pdf, table_data, title='', data_size = 10, title_size=12, align_data='L', align_header='L', cell_width='even', x_start='x_default',emphasize_data=[], emphasize_style=None, emphasize_color=(0,0,0)):
"""
table_data:
list of lists with first element being list of headers
title:
(Optional) title of table (optional)
data_size:
the font size of table data
title_size:
the font size fo the title of the table
align_data:
align table data
L = left align
C = center align
R = right align
align_header:
align table data
L = left align
C = center align
R = right align
cell_width:
even: evenly distribute cell/column width
uneven: base cell size on lenght of cell/column items
int: int value for width of each cell/column
list of ints: list equal to number of columns with the widht of each cell / column
x_start:
where the left edge of table should start
emphasize_data:
which data elements are to be emphasized - pass as list
emphasize_style: the font style you want emphaized data to take
emphasize_color: emphasize color (if other than black)
"""
default_style = pdf.font_style
if emphasize_style == None:
emphasize_style = default_style
# default_font = pdf.font_family
# default_size = pdf.font_size_pt
# default_style = pdf.font_style
# default_color = pdf.color # This does not work
# Get Width of Columns
def get_col_widths():
col_width = cell_width
if col_width == 'even':
col_width = pdf.epw / len(data[0]) - 1 # distribute content evenly # epw = effective page width (width of page not including margins)
elif col_width == 'uneven':
col_widths = []
# searching through columns for largest sized cell (not rows but cols)
for col in range(len(table_data[0])): # for every row
longest = 0
for row in range(len(table_data)):
cell_value = str(table_data[row][col])
value_length = pdf.get_string_width(cell_value)
if value_length > longest:
longest = value_length
col_widths.append(longest + 4) # add 4 for padding
col_width = col_widths
### compare columns
elif isinstance(cell_width, list):
col_width = cell_width # TODO: convert all items in list to int
else:
# TODO: Add try catch
col_width = int(col_width)
return col_width
# Convert dict to lol
# Why? because i built it with lol first and added dict func after
# Is there performance differences?
if isinstance(table_data, dict):
header = [key for key in table_data]
data = []
for key in table_data:
value = table_data[key]
data.append(value)
# need to zip so data is in correct format (first, second, third --> not first, first, first)
data = [list(a) for a in zip(*data)]
else:
header = table_data[0]
data = table_data[1:]
line_height = pdf.font_size * 2.5
# line_height = pdf.font_size * 10
col_width = get_col_widths()
pdf.set_font(size=title_size)
# Get starting position of x
# Determin width of table to get x starting point for centred table
if x_start == 'C':
table_width = 0
if isinstance(col_width, list):
for width in col_width:
table_width += width
else: # need to multiply cell width by number of cells to get table width
table_width = col_width * len(table_data[0])
# Get x start by subtracting table width from pdf width and divide by 2 (margins)
margin_width = pdf.w - table_width
# TODO: Check if table_width is larger than pdf width
center_table = margin_width / 2 # only want width of left margin not both
x_start = center_table
pdf.set_x(x_start)
elif isinstance(x_start, int):
pdf.set_x(x_start)
elif x_start == 'x_default':
x_start = pdf.set_x(pdf.l_margin)
# TABLE CREATION #
# add title
if title != '':
pdf.multi_cell(0, line_height, title, border=0, align='j', ln=3, max_line_height=pdf.font_size)
pdf.ln(line_height) # move cursor back to the left margin
pdf.set_font(size=data_size)
# add header
y1 = pdf.get_y()
if x_start:
x_left = x_start
else:
x_left = pdf.get_x()
x_right = pdf.epw + x_left
lowest_point = pdf.get_y()
highest_point = pdf.get_y()
print("header x", pdf.get_x(), "header y", pdf.get_y())
if not isinstance(col_width, list):
if x_start:
pdf.set_x(x_start)
for datum in header:
# pdf.multi_cell(col_width, line_height, datum, border=0, align=align_header, ln=3, max_line_height=pdf.font_size)
lowest_point = add_cell(pdf, col_width, line_height, datum, 0, align_header, lowest_point, highest_point)
x_right = pdf.get_x()
# pdf.ln(line_height) # move cursor back to the left margin
# y2 = pdf.get_y()
# pdf.line(x_left,y1,x_right,y1)
# pdf.line(x_left,y2,x_right,y2)
# lowest_point += line_height/2.0
pdf.line(x_left,highest_point,x_right,highest_point)
pdf.line(x_left,lowest_point,x_right,lowest_point)
for row in data:
# if x_start: # not sure if I need this
pdf.set_xy(x_start, lowest_point)
highest_point = lowest_point
for datum in row:
if datum in emphasize_data:
pdf.set_text_color(*emphasize_color)
pdf.set_font(style=emphasize_style)
# pdf.multi_cell(col_width, line_height, datum, border=0, align=align_data, ln=3, max_line_height=pdf.font_size)
lowest_point = add_cell(pdf, col_width, line_height, datum, 0, align_header, lowest_point, highest_point)
pdf.set_text_color(0,0,0)
pdf.set_font(style=default_style)
else:
# pdf.multi_cell(col_width, line_height, datum, border=0, align=align_data, ln=3, max_line_height=pdf.font_size) # ln = 3 - move cursor to right with same vertical offset # this uses an object named pdf
lowest_point = add_cell(pdf, col_width, line_height, datum, 0, align_header, lowest_point, highest_point)
# pdf.ln(line_height) # move cursor back to the left margin
# pdf.ln(line_height)
lowest_point += line_height/2.0
pdf.line(x_left,lowest_point,x_right,lowest_point)
print("making line at", lowest_point)
pdf.set_xy(x_left, lowest_point)
else:
if x_start:
pdf.set_x(x_start)
for i in range(len(header)):
datum = header[i]
# pdf.multi_cell(col_width[i], line_height, datum, border=0, align=align_header, ln=3, max_line_height=pdf.font_size)
lowest_point = add_cell(pdf, col_width[i], line_height, datum, 0, align_header, lowest_point, highest_point)
x_right = pdf.get_x()
# pdf.ln(line_height) # move cursor back to the left margin
# y2 = pdf.get_y()
# pdf.line(x_left,y1,x_right,y1)
# pdf.line(x_left,y2,x_right,y2)
# lowest_point += line_height/2.0
pdf.line(x_left,highest_point,x_right,highest_point)
pdf.line(x_left,lowest_point,x_right,lowest_point)
for i in range(len(data)):
# if x_start:
# pdf.set_x(x_start)
pdf.set_xy(x_start, lowest_point)
highest_point = lowest_point
row = data[i]
for i in range(len(row)):
datum = row[i]
if not isinstance(datum, str):
datum = str(datum)
adjusted_col_width = col_width[i]
if datum in emphasize_data:
pdf.set_text_color(*emphasize_color)
pdf.set_font(style=emphasize_style)
# pdf.multi_cell(adjusted_col_width, line_height, datum, border=0, align=align_data, ln=3, max_line_height=pdf.font_size)
lowest_point = add_cell(pdf, adjusted_col_width, line_height, datum, 0, align_header, lowest_point, highest_point)
pdf.set_text_color(0,0,0)
pdf.set_font(style=default_style)
else:
# pdf.multi_cell(adjusted_col_width, line_height, datum, border=0, align=align_data, ln=3, max_line_height=pdf.font_size) # ln = 3 - move cursor to right with same vertical offset # this uses an object named pdf
lowest_point = add_cell(pdf, adjusted_col_width, line_height, datum, 0, align_header, lowest_point, highest_point)
lowest_point += line_height/2.0
pdf.line(x_left,lowest_point,x_right,lowest_point)
pdf.set_xy(x_left, lowest_point)
y3 = pdf.get_y()
pdf.line(x_left,y3,x_right,y3)
pdf.ln()
pdf = FPDF(orientation='L', unit='mm', format='A4')
pdf.add_page()
cell_widths = "even"
create_table(pdf, table_data = my_table_data, data_size=10, align_header='L', align_data='L', cell_width=cell_widths, x_start='C')