performance - wxPython FloatCanvas 事件绑定
问题描述
我正在使用 Python 3.6 和 wxPython 4.1.0 gtk3 (phoenix) wxWidgets 3.1.4。我尝试绘制的每 4 行的 Bind 函数都有一个延迟,大约 12 行后程序崩溃。通常,我的代码使用网格来输入线条的点,但附加的代码会在单击 Draw 按钮后生成数据,效果完全相同。第 4 行的延迟约为 2.5 秒,通常绘制一条线需要约 0.1 秒。我已经为 Bind 调用尝试了两个函数,一个使用事件,另一个调用对象。如果有人知道解决方法,请告诉我。
import time
import string
import wx
from wx.lib.floatcanvas import NavCanvas, FloatCanvas
import wx.lib.colourdb
class InputForm(wx.Frame):
'''set up the form and draw axis'''
def __init__(self):
super(InputForm, self).__init__(None, wx.ID_ANY, title='Plot Lines', size=(1300, 830))
# set dictionary of points; key node letter, value tuple of point,
self.pts = {}
# create the form level sizer
Main_Sizer = wx.BoxSizer(wx.HORIZONTAL)
# add the sizer for the left side widgets
sizerL = wx.BoxSizer(wx.VERTICAL)
# add the grid and then set it ot he left panel
btnsizer = wx.BoxSizer(wx.HORIZONTAL)
drw = wx.Button(self, -1, "Draw\nLines")
btnsizer.Add(drw, 0, wx.ALL|wx.ALIGN_CENTER, 5)
# bind the button events to handlers
self.Bind(wx.EVT_BUTTON, self.OnDraw, drw)
sizerL.Add((10, 20))
sizerL.Add(btnsizer, 1, wx.ALIGN_CENTER)
# add the draw panel
rght = NavCanvas.NavCanvas(self,
ProjectionFun=None,
Debug=0,
BackgroundColor="LIGHT GREY",
)
self.Canvas = rght.Canvas
self.InitCanvas()
Main_Sizer.Add(sizerL, 0, wx.EXPAND)
Main_Sizer.Add((10, 10))
Main_Sizer.Add(rght, 1, wx.EXPAND)
self.SetSizer(Main_Sizer)
def InitCanvas(self):
# add the x & y axis
self.Canvas.AddLine([(0, 0), (0, 5)], LineWidth=2, LineColor='Yellow')
self.Canvas.AddLine([(0, 0), (5, 0)], LineWidth=2, LineColor='Green')
origin = self.Canvas.AddScaledTextBox('origin', (0, 0),
Color='blue',
Size=.5,
PadSize=0,
Width=None,
LineColor=None,
Family=wx.MODERN,
Position='tr',
Alignment='bottom',
InForeground=True)
# first Bind of node to EvtLeftDown
origin.Bind(FloatCanvas.EVT_FC_LEFT_DOWN,
lambda evt, selctEnd='Origin':
self.EvtLeftDown(evt, 'Origin'))
wx.CallAfter(self.Canvas.ZoomToBB)
def OnDraw(self, evt):
pts1 = (0, 0)
x = [i for i in range(5, 30, 2)]
y = x[::-1]
pts2 = [(x[i], y[i]) for i in range(0, len(x))]
alph = string.ascii_uppercase
LnLbls = [alph[i] for i in range(0, len(x))]
New_EndPt = True
n = 0
for pt in pts2:
points = []
points.append(pts1)
points.append(pt)
LnLbl = LnLbls[n]
New_EndPt = True
n += 1
self.DrawLine(points, LnLbl, New_EndPt)
def DrawLine(self, points, LnLbl, New_EndPt):
'''Draws the line object as specified in the VarifyData() function'''
# label the end point of the line in lower case
if New_EndPt is True:
new_end = self.Canvas.AddScaledTextBox(LnLbl.lower(), tuple(points[1]),
Color='black',
Size=.5,
PadSize=.2,
Width=None,
LineColor=None,
Family=wx.MODERN,
Position='cc',
Alignment='bottom',
InForeground=True)
new_end.Bind(FloatCanvas.EVT_FC_LEFT_DOWN,
lambda evt, selctEnd=LnLbl.lower():
self.EvtLeftDown(evt, selctEnd))
# define the new line
self.Canvas.AddLine(points, LineWidth=2, LineColor='red')
# add the new line to the list of lines
self.Canvas.AddPoint(tuple(points[1]), 'black', 8)
# locate the center of the new line for the label location
lncntr = ((int(points[0][0])+int(points[1][0]))//2,
(int(points[0][1])+int(points[1][1]))//2)
# place the new line lable
new_line = self.Canvas.AddScaledTextBox(LnLbl, lncntr,
Color='red',
Size=.5,
PadSize=None,
Width=None,
LineColor=None,
Family=wx.MODERN,
Position='tc',
Alignment='bottom',
InForeground=True)
new_line.Name = LnLbl
tic = time.perf_counter()
new_line.Bind(FloatCanvas.EVT_FC_LEFT_DOWN, self.ObjLeftDown)
toc = time.perf_counter()
print(f'time to execute BIND function for DrawLine line 136 = {toc-tic:0.2f}')
wx.CallAfter(self.Canvas.ZoomToBB)
def ObjLeftDown(self, object):
lbl = object.Name
if lbl == 'Origin':
self.Node(lbl)
elif 65 <= ord(lbl) <= 90:
print('you have selected line ', lbl)
elif 97 <= ord(lbl) <= 122:
print('you have selected node ', lbl)
def EvtLeftDown(self, evt, lbl):
if lbl == 'Origin':
print('you have selected the origin')
elif 97 <= ord(lbl) <= 122:
print('you have selected node ', lbl)
# Run the program
if __name__ == "__main__":
app = wx.App(False)
frame = InputForm()
frame.Center()
frame.Show()
app.MainLoop()
解决方案
通过对您的代码进行细微调整,我无法复制delays
您所指的内容。
无论我重新画线多少次,时间总是在大致相同的时间范围内。
绑定是针对不同的对象的,它只是将一个事件绑定到一个对象,所以我怀疑这是问题所在。
import time
import string
import wx
from wx.lib.floatcanvas import NavCanvas, FloatCanvas
import wx.lib.colourdb
class InputForm(wx.Frame):
'''set up the form and draw axis'''
def __init__(self):
super(InputForm, self).__init__(None, wx.ID_ANY, title='Plot Lines', size=(1300, 830))
# set dictionary of points; key node letter, value tuple of point,
self.pts = {}
self.draw_repetitions = 0
# create the form level sizer
Main_Sizer = wx.BoxSizer(wx.HORIZONTAL)
# add the sizer for the left side widgets
sizerL = wx.BoxSizer(wx.VERTICAL)
# add the grid and then set it ot he left panel
btnsizer = wx.BoxSizer(wx.HORIZONTAL)
drw = wx.Button(self, -1, "Draw\nLines")
btnsizer.Add(drw, 0, wx.ALL|wx.ALIGN_CENTER, 5)
# bind the button events to handlers
self.Bind(wx.EVT_BUTTON, self.OnDraw, drw)
sizerL.Add((10, 20))
sizerL.Add(btnsizer, 1, wx.ALIGN_CENTER)
# add the draw panel
self.rght = NavCanvas.NavCanvas(self,
ProjectionFun=None,
Debug=0,
BackgroundColor="LIGHT GREY",
)
#self.Canvas = self.rght.Canvas
self.InitCanvas()
Main_Sizer.Add(sizerL, 0, wx.EXPAND)
Main_Sizer.Add((10, 10))
Main_Sizer.Add(self.rght, 1, wx.EXPAND)
self.SetSizer(Main_Sizer)
def InitCanvas(self):
# add the x & y axis
self.Canvas = self.rght.Canvas
self.Canvas.ClearAll()
self.Canvas.AddLine([(0, 0), (0, 5)], LineWidth=2, LineColor='Yellow')
self.Canvas.AddLine([(0, 0), (5, 0)], LineWidth=2, LineColor='Green')
origin = self.Canvas.AddScaledTextBox('origin', (0, 0),
Color='blue',
Size=.5,
PadSize=0,
Width=None,
LineColor=None,
Family=wx.MODERN,
Position='tr',
Alignment='bottom',
InForeground=True)
# first Bind of node to EvtLeftDown
origin.Bind(FloatCanvas.EVT_FC_LEFT_DOWN,
lambda evt, selctEnd='Origin':
self.EvtLeftDown(evt, 'Origin'))
wx.CallAfter(self.Canvas.ZoomToBB)
def OnDraw(self, evt):
self.InitCanvas()
pts1 = (0, 0)
x = [i for i in range(5, 30, 2)]
y = x[::-1]
pts2 = [(x[i], y[i]) for i in range(0, len(x))]
alph = string.ascii_uppercase
LnLbls = [alph[i] for i in range(0, len(x))]
New_EndPt = True
n = 0
for pt in pts2:
points = []
points.append(pts1)
points.append(pt)
LnLbl = LnLbls[n]
New_EndPt = True
n += 1
self.DrawLine(points, LnLbl, New_EndPt)
def DrawLine(self, points, LnLbl, New_EndPt):
'''Draws the line object as specified in the VarifyData() function'''
self.draw_repetitions += 1
# label the end point of the line in lower case
if New_EndPt is True:
new_end = self.Canvas.AddScaledTextBox(LnLbl.lower(), tuple(points[1]),
Color='black',
Size=.5,
PadSize=.2,
Width=None,
LineColor=None,
Family=wx.MODERN,
Position='cc',
Alignment='bottom',
InForeground=True)
new_end.Bind(FloatCanvas.EVT_FC_LEFT_DOWN,
lambda evt, selctEnd=LnLbl.lower():
self.EvtLeftDown(evt, selctEnd))
# define the new line
self.Canvas.AddLine(points, LineWidth=2, LineColor='red')
# add the new line to the list of lines
self.Canvas.AddPoint(tuple(points[1]), 'black', 8)
# locate the center of the new line for the label location
lncntr = ((int(points[0][0])+int(points[1][0]))//2,
(int(points[0][1])+int(points[1][1]))//2)
# place the new line lable
new_line = self.Canvas.AddScaledTextBox(LnLbl, lncntr,
Color='red',
Size=.5,
PadSize=None,
Width=None,
LineColor=None,
Family=wx.MODERN,
Position='tc',
Alignment='bottom',
InForeground=True)
new_line.Name = LnLbl
tic = time.perf_counter()
new_line.Bind(FloatCanvas.EVT_FC_LEFT_DOWN, self.ObjLeftDown)
toc = time.perf_counter()
print(f'time to execute BIND function for DrawLine line ',LnLbl, toc-tic)
print(f'Draw repetitions ',self.draw_repetitions)
# wx.CallAfter(self.Canvas.ZoomToBB)
self.Canvas.ZoomToBB()
def ObjLeftDown(self, object):
lbl = object.Name
if lbl == 'Origin':
self.Node(lbl)
print(dir(self.Node))
elif 65 <= ord(lbl) <= 90:
print('you have selected line ', lbl)
elif 97 <= ord(lbl) <= 122:
print('you have selected node ', lbl)
def EvtLeftDown(self, evt, lbl):
if lbl == 'Origin':
print('you have selected the origin')
elif 97 <= ord(lbl) <= 122:
print('you have selected node ', lbl)
# try:
# evt.Skip()
# except:
# pass
# Run the program
if __name__ == "__main__":
app = wx.App(False)
frame = InputForm()
frame.Center()
frame.Show()
app.MainLoop()
推荐阅读
- python - 如何在 Python 中使用堆栈方法编写欧几里德算法?
- time-complexity - 如何获得这样一个奇怪代码的时间复杂度?
- python - BaseHash 'str' 对象没有属性 'base'
- assembly - 寄存器是算术计算操作数的唯一来源吗?
- javascript - 我如何使命令显示多于一个 ARG
- c - C double printf() 当我的 scanf() 中有空格时
- maven - 如何删除xml文件上的红线?
- flutter - Flutter/Dart http POST 重定向通过 GET 发送正文
- docker - 在 docker swarm 模式下使用节点导出器在 Grafana/Prometheus 中查询错误
- javascript - 创建一个新菜单和一个项目,用于在谷歌工作表中上传 excel 模板(Javascript)