I am working on a cocos2d learning project. When I want to change the scenes, I got only the first scene, the second scene never shows up.
Could anyone tell me about what was wrong in my code?
import cocos
import time
from cocos.scene import *
from cocos.director import director
class HelloCocos(cocos.layer.Layer):
def __init__(self, text):
super().__init__()
self.text = text
size = director.get_window_size()
label = cocos.text.Label(self.text, font_name="Times New Roman", font_size=32)
label.position = size[0] / 2, size[1] / 2
self.add(label)
class HelloCocos2(cocos.layer.Layer):
def __init__(self, text):
super().__init__()
self.text = text
size = director.get_window_size()
label = cocos.text.Label(self.text, font_name="Times New Roman", font_size=32)
label.position = size[0] / 3, size[1] / 3
self.add(label)
director.init(width=1280, height=800, caption="my cocos window")
first_scene = Scene(HelloCocos("hello cocos"))
second_scene = Scene(HelloCocos2("end cocos"))
director.run(first_scene)
director.replace(second_scene)
In cocos2d, in order to replace scenes, you push the first scene to the stack, and pop up the second scene like this.
Director::getInstance()->replaceScene(second_scene);
Related
I created a Panel in a wxFrame and then created a FigureCanvas. I would like to fit the FigureCanvas into the panel completely, but somehow the FigureCanvas does not go into the panel2_2, but exactly on just the opposite side.
Following is my code.
import wx
from numpy import arange, sin, pi
import matplotlib
matplotlib.use('WXAgg')
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.figure import Figure
class Frame1(wx.Frame):
def __init__(self, prnt):
wx.Frame.__init__(self, parent=prnt,
pos=wx.Point(0, 0), size=wx.Size(1340, 720),
style=wx.DEFAULT_FRAME_STYLE)
self.panel2_2 = wx.Panel(parent=self,
pos=wx.Point(940, 30), size=wx.Size(400, 690),
style=wx.TAB_TRAVERSAL)
self.figure = Figure()
self.axes = self.figure.add_subplot(111)
self.canvas = FigureCanvas(self.panel2_2, -1, self.figure)
sizer = wx.BoxSizer(wx.HORIZONTAL)
sizer.Add(self.canvas, 0, wx.EXPAND)
self.panel2_2.SetSizer(sizer)
self.panel2_2.Fit()
t = arange(0.0, 3.0, 0.01)
s = sin(2 * pi * t)
self.axes.plot(t, s)
#Every wxWidgets application must have a class derived from wxApp
class MyApp(wx.App):
# wxWidgets calls this method to initialize the application
def OnInit(self):
# Create an instance of our customized Frame class
self.frame = Frame1(None)
self.SetTopWindow(self.frame)
self.frame.Show()
return True
if __name__ == '__main__':
application = MyApp(0)
application.MainLoop()
and the result
I would like to have the image on the panel2_2 ( that is on the right hand side ) and not on the left hand side
I think the canvas is indeed going to panel2_2. The problem in your MWE is that you do not define a sizer for panel2_2. Therefore, panel2_2 is rendered from the upper left corner of the frame. This results in panel2_2 plus the canvas showing in the left of the frame. What you see to the right of the canvas is not panel2_2 but the rest of the frame since the size of the frame is larger than the size of panel2_2. If you add a blue panel1_1 and assign another wx.BoxSizer to the frame you get the canvas showing to the right.
import wx
from numpy import arange, sin, pi
import matplotlib
matplotlib.use('WXAgg')
from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as FigureCanvas
from matplotlib.figure import Figure
class Frame1(wx.Frame):
def __init__(self, prnt):
wx.Frame.__init__(self, parent=prnt,
pos=wx.Point(0, 0), size=wx.Size(1340, 720),
style=wx.DEFAULT_FRAME_STYLE)
self.panel1_1 = wx.Panel(parent=self, size=(400, 690))
self.panel1_1.SetBackgroundColour('blue')
self.panel2_2 = wx.Panel(parent=self,
pos=wx.Point(940, 30), size=wx.Size(400, 690),
style=wx.TAB_TRAVERSAL)
self.figure = Figure()
self.axes = self.figure.add_subplot(111)
self.canvas = FigureCanvas(self.panel2_2, -1, self.figure)
sizer = wx.BoxSizer(wx.HORIZONTAL)
sizer.Add(self.canvas, 0, wx.EXPAND)
self.panel2_2.SetSizer(sizer)
self.panel2_2.Fit()
sizerPanels = wx.BoxSizer(wx.HORIZONTAL)
sizerPanels.Add(self.panel1_1)
sizerPanels.Add(self.panel2_2)
sizerPanels.Fit(self)
self.SetSizer(sizerPanels)
t = arange(0.0, 3.0, 0.01)
s = sin(2 * pi * t)
self.axes.plot(t, s)
self.Center()
#Every wxWidgets application must have a class derived from wxApp
class MyApp(wx.App):
# wxWidgets calls this method to initialize the application
def OnInit(self):
# Create an instance of our customized Frame class
self.frame = Frame1(None)
self.SetTopWindow(self.frame)
self.frame.Show()
return True
if __name__ == '__main__':
application = MyApp(0)
application.MainLoop()
from Tkinter import *
import Tkinter as tk
import ttk
import tkFileDialog
import numpy as np
import matplotlib
matplotlib.use("TkAgg")
import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
class Look():
def __init__(self, master):
self.master = master
self.master.title("Demo")
self.master.configure(background = "grey91") #the color will be changed later
self.master.minsize(500, 300) # width + height
self.master.resizable(False, False)
self.top_frame = ttk.Frame(self.master, padding = (10, 10))
self.top_frame.pack()
ttk.Button(self.top_frame, text = "Load file", command = self.load_file,
style = "TButton").pack()
ttk.Button(self.top_frame, text = "Reset", command = self.clear_file,
style = "TButton").pack()
ttk.Button(self.top_frame, text = "Plot", command = self.plot_file,
style = "TButton").pack()
self.bottom_frame = ttk.Frame(self.master, padding = (10, 10))
self.bottom_frame.pack()
self.fig = plt.figure(figsize=(12, 5), dpi=100) ##create a figure; modify the size here
self.fig.add_subplot()
plt.title("blah")
self.canvas = FigureCanvasTkAgg(self.fig, master = self.bottom_frame)
self.canvas.show()
self.canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=1)
self.toolbar = NavigationToolbar2TkAgg(self.canvas, self.bottom_frame)
self.toolbar.update()
self.canvas._tkcanvas.pack(side=tk.TOP, fill=tk.BOTH, expand=1)
def load_file(self):
self.file = tkFileDialog.askopenfilename(defaultextension = ".txt", filetypes = [("Text Documents", "*.txt")])
def clear_file(self):
self.fig.clf()
self.fig.add_subplot()
plt.xticks()
plt.yticks()
self.canvas.draw()
def plot_file(self):
self.r, self.g = np.loadtxt(self.file).transpose()
self.fig.clf()
plt.plot(self.r, self.g)
self.canvas.show()
def main():
root = Tk()
GUI = Look(root)
root.mainloop()
if __name__ == "__main__": main()
The code above creates a program has three buttons. The Load file buttom loads a txt file, Reset button is supposed to clear the plot and delete the file just loaded into the memory. Plot button is to plot the figure onto canvas below.
I have a question about how to write function associated with Reset function, i.e. clear_file function. Currently what it does is just clear the plot from canvas. But it seems the file that has been loaded to plot is stored in memory, since click again Plot, it will display the plot. My goal is to use Reset button to bring it to a fresh start--nothing stored in memory. I know loading a new file will overwrite the previous file. But when there are multiple buttons for loading different files, the situations could become complicated. Therefore I hope Reset can do the job.
If you want to try this little program, you may create a simple txt with two column data to be loaded into the program.
Thanks.
I would make 2 changes. Move the code that sets up your plot into its own method and reset the frame each time the method is called. This can be done with destroying the frame and remaking it. The 2nd change I would change the command on your reset to reference this new method.
Taking your code this is what I would change to be able to reset the plot.
import tkinter as tk
import tkinter.ttk as ttk
from tkinter import filedialog
import numpy as np
import matplotlib
matplotlib.use("TkAgg")
import matplotlib.pyplot as plt
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
from matplotlib.figure import Figure
class Look():
def __init__(self, master):
self.master = master
self.master.title("Demo")
self.master.configure(background = "grey91") #the color will be changed later
self.master.minsize(500, 300) # width + height
self.master.resizable(False, False)
self.top_frame = ttk.Frame(self.master, padding = (10, 10))
self.top_frame.pack()
ttk.Button(self.top_frame, text = "Load file", command = self.load_file,style = "TButton").pack()
ttk.Button(self.top_frame, text = "Reset", command = self.new_plot,style = "TButton").pack()
ttk.Button(self.top_frame, text = "Plot", command = self.plot_file,style = "TButton").pack()
self.bottom_frame = ttk.Frame(self.master, padding = (10, 10))
self.bottom_frame.pack()
self.new_plot()
# this function will reset your plot with a fresh one.
def new_plot(self):
self.bottom_frame.destroy()
self.bottom_frame = ttk.Frame(self.master, padding = (10, 10))
self.bottom_frame.pack()
self.fig = plt.figure(figsize=(12, 5), dpi=100) ##create a figure; modify the size here
self.fig.add_subplot()
plt.title("blah")
self.canvas = FigureCanvasTkAgg(self.fig, master = self.bottom_frame)
self.canvas.show()
self.canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=1)
self.toolbar = NavigationToolbar2TkAgg(self.canvas, self.bottom_frame)
self.toolbar.update()
self.canvas._tkcanvas.pack(side=tk.TOP, fill=tk.BOTH, expand=1)
def load_file(self):
self.file = filedialog.askopenfilename(defaultextension = ".txt", filetypes = [("Text Documents", "*.txt")])
def clear_file(self):
self.fig.clf()
self.fig.add_subplot()
plt.xticks()
plt.yticks()
self.canvas.draw()
def plot_file(self):
self.r, self.g = np.loadtxt(self.file).transpose()
self.fig.clf()
plt.plot(self.r, self.g)
self.canvas.show()
if __name__ == "__main__":
root = tk.Tk()
GUI = Look(root)
root.mainloop()
I am trying to create a new class of Canvas that will be able to display and resize images. However The image does not display. I searched for similar questions and all the answers said to keep a reference of the PhotoImage in the class.( This answer for example). I tried doing that in a number of ways and none worked. In this example I tried saving a reference in a dictionary. I also tried self.tkimage = ImageTk.PhotoImage(image=img) which didn't work. And also tried using globals. I assume it has something to do with the garbage collector, but don't know how to solve.
Please assist.
import Tkinter as tk
from PIL import ImageTk, Image
import numpy as np
# a subclass of Canvas
class MyCanvas(tk.Canvas):
def __init__(self,parent,**kwargs):
tk.Canvas.__init__(self,parent,**kwargs)
self.tkimg = {}
self.images = []
self.image_on_canvas = []
def my_create_image(self, *args, **kw):
img = kw['image']
self.images.append(img)
self.tkimg[img] = ImageTk.PhotoImage(image=img)
kw['image'] = self.tkimg[img]
item = self.create_image(*args, **kw)
self.image_on_canvas.append(item)
def main():
root = tk.Tk()
myframe = tk.Frame(root)
myframe.pack(fill=tk.BOTH, expand=tk.YES)
mycanvas1 = MyCanvas(myframe, width=850, height=400, bg="red", highlightthickness=0)
mycanvas2 = MyCanvas(myframe, width=850, height=400, bg="green", highlightthickness=0)
mycanvas1.pack(side=tk.LEFT, fill=tk.BOTH, expand=tk.YES)
mycanvas2.pack(side=tk.RIGHT, fill=tk.BOTH, expand=tk.YES)
# add some widgets to the canvas
mycanvas2.create_line(0, 100, 200, 0, fill="red", dash=(4, 4))
mycanvas2.create_rectangle(50, 25, 150, 75, fill="blue")
arr1 = np.random.random([256,256])*255
img1 = Image.fromarray(arr1)
mycanvas1.my_create_image(0, 0, image=img1, anchor=tk.NW)
root.mainloop()
if __name__ == "__main__":
main()
class ManageExistingColleaguePanel(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent)
main_sizer = wx.BoxSizer(wx.VERTICAL)
con = sqlite3.connect("hs_audit.sqlite")
con.text_factory = str
cur = con.cursor()
cur.execute("SELECT engineer FROM T1")
myList = [r[0] for r in cur.fetchall()]
con.close()
main_sizer.AddStretchSpacer()
for n in range(0, len(myList)):
main_sizer.Add(wx.Button(self, wx.CENTER, label = str(myList[(n)]), size = (200, 35)))
main_sizer.AddStretchSpacer()
self.SetSizer(main_sizer)
I have been trying to get a column of buttons centered in the frame labeled with the contents of a column in a mysqlite3 table.
I can get the buttons in a column all labelled but can't get them centered. I have tried loads of different combinations to get this right, but get errors regarding undefined label or size variables. I can get a centered column of buttons but then I am unable to label them.
Any help please this is driving me mad.
At last. Can't seem to get the hang of the wxpython sizer syntax's.
Anyways here was the answer.
class ManageExistingColleaguePanel(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent)
main_sizer = wx.BoxSizer(wx.VERTICAL)
con = sqlite3.connect("hs_audit.sqlite")
con.text_factory = str
cur = con.cursor()
cur.execute("SELECT engineer FROM T1")
myList = [r[0] for r in cur.fetchall()]
con.close()
main_sizer.AddStretchSpacer()
for n in range(0, len(myList)):
main_sizer.Add(wx.Button(self, label=str(myList[(n)]), size=(200, 35)), 0, wx.CENTER)
main_sizer.AddStretchSpacer()
self.SetSizer(main_sizer)
I am new to Python and even newer to Tkinter.
I am currently practicing how to use Frames and Labels and
the problem I am encountering is, when I put Labels on a frame with some buttons next to each label,
the alignment is not good to look at.
Here is the code:
from Tkinter import *
class GUI():
def __init__(self):
self.namelist = ["Mark","Anna","Jason","Lenna","Leo","Zucharich","Robinson","AReallyLongNameThatMightExist"]
self.canvas = Canvas(width=1200,height=700)
self.canvas.pack(expand=YES,fill=BOTH)
def Friends(self):
controlframe = Frame(self.canvas)
controlframe.place(x=600,y=300)
#Frame for showing names of friends
for x in self.namelist:
frame = Frame(controlframe)
frame.pack()
Name = Label(frame,text="%s "%x).pack(side=LEFT)
chatButton = Button(frame,text="Chat").pack(side=LEFT)
delButton = Button(frame,text="Delete").pack(side=LEFT)
setcloseButton = Button(frame,text="Set Close").pack(side=LEFT)
setgroupButton = Button(frame,text="Set Group").pack(side=LEFT)
mainloop()
GUI = GUI()
GUI.Friends()
What should I do so that the alignment of the Label(=name) and the button is equal to the other ones so that they will form a shape of a rectangle and not some zigzag?
It is almost always better in Tk to use the grid geometry manager. It is much more flexible once you come to understand how it works. Converting your example to use grid solves your problem as shown below but you should experiment with it a bit. Try removing the 'sticky="W"' from the label for instance and see that the centering of the widgets within the row or column can be controlled. To get your frame responding to resizes sensibly you should investigate the columnconfigure and rowconfigure options for the grid geometry management as well.
from Tkinter import *
class GUI():
def __init__(self):
self.namelist = ["Mark","Anna","Jason","Lenna",
"Leo","Zucharich","Robinson",
"AReallyLongNameThatMightExist"]
self.canvas = Canvas(width=1200,height=700)
self.canvas.pack(expand=YES,fill=BOTH)
def Friends(self):
frame = Frame(self.canvas)
frame.place(x=600,y=300)
#Frame for showing names of friends
row = 0
for x in self.namelist:
label = Label(frame,text="%s "%x)
chatButton = Button(frame,text="Chat")
delButton = Button(frame,text="Delete")
setcloseButton = Button(frame,text="Set Close")
setgroupButton = Button(frame,text="Set Group")
label.grid(row=row, column=0, sticky="W")
chatButton.grid(row=row, column=1)
delButton.grid(row=row, column=2)
setcloseButton.grid(row=row, column=3)
setgroupButton.grid(row=row, column=4)
row = row + 1
mainloop()
GUI = GUI()
GUI.Friends()