Hi community,
I have developed a tkinter GUI component, Python v3.7. It runs very well in
Linux but seeing a huge performance impact in Windows 10. While in Linux an
almost real-time performance is achieved, in Windows it is slow to an
unusable level.
The code is somewhat stripped down from the original, but the performance
difference is the same anyway. The columns can be resized by clicking on
the column border and dragging it. Resizing works only for the top row (but
it resizes the entire column).
In this demo, all bindings are avoided to exclude influence on the
component performance and thus not included. If you resize the window
(i.e., if you maximize it), you must call the function table.fit() from
IDLE shell.
Does anyone know where is this huge difference in performance coming from?
Can anything be done about it?
Thank you,
--
Robert Okadar
IT Consultant
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import tkinter
class Resizer(tkinter.Frame):
def __init__(self, info_grid, master, **cnf):
self.table_grid = info_grid
tkinter.Frame.__init__(self, master, **cnf)
self.bind('<Button1-Motion>', self.resize_column)
self.bind('<ButtonPress-1>', self.resize_start)
self.bind('<ButtonRelease-1>', self.resize_end)
self._resizing = False
self.bind('<Destroy>', self.onDestroyEvent)
def onDestroyEvent(self, event):
self.table_grid = []
def resize_column(self, event, width = None):
#if self._resizing:
top = self.table_grid.Top
grid = self.table_grid._grid
col = self.master.grid_info()["column"]
if not width:
width = self._width + event.x_root - self._x_root
top.columnconfigure(col, minsize = width)
grid.columnconfigure(col, minsize = width)
def resize_start(self, event):
top = self.table_grid.Top
self._resizing = True
self._x_root = event.x_root
col = self.master.grid_info()["column"]
self._width = top.grid_bbox(row = 0, column = col)[2]
#print event.__dict__
col = self.master.grid_info()["column"]
#print top.grid_bbox(row = 0, column = col)
def resize_end(self, event):
pass
#self.table_grid.xscrollcommand()
#self.table_grid.column_resize_callback(col, self)
class Table(tkinter.Frame):
def __init__(self, master, columns = 10, rows = 20, width = 100,**kw):
tkinter.Frame.__init__(self, master, **kw)
self.columns = []
self._width = width
self._grid = grid = tkinter.Frame(self, bg = "#CCCCCC")
self.Top = top = tkinter.Frame(self, bg = "#DDDDDD")
self.create_top(columns)
self.create_grid(rows)
#self.bind('<Configure>', self.on_table_configure)
#self.bind('<Map>', self.on_table_map)
top.pack(anchor = 'nw')#, expand = 1, fill = "both")
grid.pack(anchor = 'nw')#fill = "both",expand = 1
def on_table_map(self, event):
theight = self.winfo_height()
def fit(self):#on_table_configure(self, event):
i = 0
for frame in self.Top.grid_slaves(row = 0):
frame.resizer.resize_column(None, width = frame.winfo_width())
i += 1
theight = self.winfo_height()
fheight = self._grid.winfo_height() + self.Top.winfo_height()
#print('<Map>', theight, fheight)
if theight > fheight:
rheight = self.grid_array[0][0].winfo_height()
ammount = int((-fheight + theight) / rheight)
#print(rheight, ammount)
for i in range(ammount):
self.add_row()
self.update()
def add_row(self, ammount = 1):
columnsw = self.columns
row = []
i = len(self.grid_array)
for j in range(len(columnsw)):
bg = self.bgcolor0
if i % 2 == 1:
bg = self.bgcolor1
entry = tkinter.Label(self._grid, bg = bg, text = '%i %i' % (i, j))
entry.grid(row = i, column = j, sticky = "we", padx = 2)
row.append(entry)
self.grid_array.append(row)
bgcolor0 = "#FFFFFF"
bgcolor1 = "#EEEEEE"
def create_grid(self, height):
#grid.grid(row = 0, column = 0, sticky = "nsew")
columnsw = self.columns# = self.Top.grid_slaves(row = 1)
self.grid_array = []
for i in range(height):
row = []
for j in range(len(columnsw)):
bg = self.bgcolor0
if i % 2 == 1:
bg = self.bgcolor1
#entry = self.EntryClass(False, self, self._grid, bg = bg,
width = 1, )
entry = tkinter.Label(self._grid, bg = bg, text = '%i %i' %
(i,j))
entry.grid(row = i, column = j, sticky = "we", padx = 2)
row.append(entry)
self.grid_array.append(row)
def create_top(self, columns = 10):
top = self.Top
#columns = self._columns #maybe to rename
for i in range(columns):
name = 'column %i' % i
self.add_column(name, top)
def add_column(self, name, top, width = None):
if not width:
width = self._width
col = tkinter.Frame(top)
i = len(self.columns)
#filter = Filter(self, name, i, top)
entry = tkinter.Entry(col, width = 1) #readonlybackground
#col.ColumnIndex = i
#col.array_index = i
entry.insert(0, name)
resizer = Resizer(self, col, bg = "#000000", width = 3, height = 21,
cursor = 'sb_h_double_arrow')
#entry.grid(row = 0, column = 0, sticky = "we")
#resizer.grid(row = 0, column = 1, sticky = "e")
entry.pack(side = "left", fill = "both", expand = 1)
resizer.pack(side = "right")
top.columnconfigure(i, minsize = width, weight = 1)
#filter.grid(row = 0, column = i, sticky = "we")
col.grid(row = 0, column = i, sticky = "we")
col.entry = entry
#col.filter = filter
#col.index = filter.index = i
col.resizer = resizer
#filter.Column = col
entry.Column = col
self.columns.append(col)
if __name__ == '__main__':
columns = 30
rows = 20
width = 60
root = tkinter.Tk()
root.wm_title('TableGridTest')
table = self = Table(root, columns = columns, rows = rows, width = width)
table.pack(expand = 1, fill = 'both')
#table.create_grid(
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