Trying to scroll a graphic on the screen while keeping the text in the same place. The text shows where the mouse is located. I've thought about the idea of scrolling the text in the opposite direction of the screen scroll but I'm not sure if there is an easier way of doing it and if I have to scroll the text the opposite way I'm not sure how to set the initial text pointer so I can come back and recall/reset it. I'm only wanting it to show the position on not as will be doing other things in the near future.
class Example(tk.Frame):
def __init__(self, parent):
tk.Frame.__init__(self, parent)
self.keys = dict.fromkeys(('Left', 'Right', 'Up', 'Down'))
self.canvas = tk.Canvas(self, background="bisque", width=700, height=700)
self.canvas.pack(fill="both", expand=True)
self.canvas.configure(scrollregion=(-1000, -1000, 1000, 1000))
self.looper() # start the looping
def keypress(self,event):
if event.keysym in self.keys:
# event type 2 is key down, type 3 is key up
self.keys[event.keysym] = event.type == '2'
def looper(self):
if self.keys['Up']:
self.canvas.yview_scroll(-2,'units')
if self.keys['Down']:
self.canvas.yview_scroll(2,'units')
if self.keys['Left']:
self.canvas.xview_scroll(-2,'units')
if self.keys['Right']:
self.canvas.xview_scroll(2,'units')
self.after(5, self.looper) # set the refresh rate here ... ie 20 milliseconds. Smaller number means faster scrolling
def on_press(self, event):
self.last_x = event.x
self.last_y = event.y
self.startx, self.starty = self.canvas.canvasx(event.x),self.canvas.canvasy(event.y)
def on_motion(self, event):
self.canvas.delete("sx")
self.startx, self.starty = self.canvas.canvasx(event.x),self.canvas.canvasy(event.y)
px = round(-(((1000-self.startx) * .00015) + 69.3),5)
py = round((45.05-((1000+self.starty) * .00015)),5)
self.canvas.create_text(400,-400, text = str(px), fill = "black", tags = "sx")
self.canvas.create_text(475,-400, text = str(py), fill = "black", tags = "sx")
def button_motion(self,event):
delta_x = event.x - self.last_x
delta_y = event.y - self.last_y
self.last_x = event.x
self.last_y = event.y
self.canvas.xview_scroll(-delta_x, "units")
self.canvas.yview_scroll(-delta_y, "units")
if __name__ == "__main__":
root = tk.Tk()
Example(root).pack(fill="both", expand=True)
root.mainloop()
The simplest solution is to use a widget that is not embedded in the canvas for the text so that it won't scroll when the canvas scrolls. Create a Label with it's parent being the canvas, and then use place to superimpose the label on top of the canvas.
Related
Good night.
I have seen some programs with new borderless designs and still you can make use of resizing.
At the moment I know that to remove the borders of a pyqt program we use:
QtCore.Qt.FramelessWindowHint
And that to change the size of a window use QSizeGrip.
But how can we resize a window without borders?
This is the code that I use to remove the border of a window but after that I have not found information on how to do it in pyqt5.
I hope you can help me with an example of how to solve this problem
from PyQt5.QtWidgets import QMainWindow,QApplication
from PyQt5 import QtCore
class Main(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.setWindowFlags(QtCore.Qt.FramelessWindowHint)
app = QApplication([])
m = Main()
m.show()
m.resize(800,600)
app.exec_()
If you use a QMainWindow you can add a QStatusBar (which automatically adds a QSizeGrip) just by calling statusBar():
This function creates and returns an empty status bar if the status bar does not exist.
Otherwise, you can manually add grips, and their interaction is done automatically based on their position. In the following example I'm adding 4 grips, one for each corner, and then I move them each time the window is resized.
class Main(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.setWindowFlags(QtCore.Qt.FramelessWindowHint)
self.gripSize = 16
self.grips = []
for i in range(4):
grip = QSizeGrip(self)
grip.resize(self.gripSize, self.gripSize)
self.grips.append(grip)
def resizeEvent(self, event):
QMainWindow.resizeEvent(self, event)
rect = self.rect()
# top left grip doesn't need to be moved...
# top right
self.grips[1].move(rect.right() - self.gripSize, 0)
# bottom right
self.grips[2].move(
rect.right() - self.gripSize, rect.bottom() - self.gripSize)
# bottom left
self.grips[3].move(0, rect.bottom() - self.gripSize)
UPDATE
Based on comments, also side-resizing is required. To do so a good solution is to create a custom widget that behaves similarly to QSizeGrip, but for vertical/horizontal resizing only.
For better implementation I changed the code above, used a gripSize to construct an "inner" rectangle and, based on it, change the geometry of all widgets, for both corners and sides.
Here you can see the "outer" rectangle and the "inner" rectangle used for geometry computations:
Then you can create all geometries, for QSizeGrip widgets (in light blue):
And for custom side widgets:
from PyQt5 import QtCore, QtGui, QtWidgets
class SideGrip(QtWidgets.QWidget):
def __init__(self, parent, edge):
QtWidgets.QWidget.__init__(self, parent)
if edge == QtCore.Qt.LeftEdge:
self.setCursor(QtCore.Qt.SizeHorCursor)
self.resizeFunc = self.resizeLeft
elif edge == QtCore.Qt.TopEdge:
self.setCursor(QtCore.Qt.SizeVerCursor)
self.resizeFunc = self.resizeTop
elif edge == QtCore.Qt.RightEdge:
self.setCursor(QtCore.Qt.SizeHorCursor)
self.resizeFunc = self.resizeRight
else:
self.setCursor(QtCore.Qt.SizeVerCursor)
self.resizeFunc = self.resizeBottom
self.mousePos = None
def resizeLeft(self, delta):
window = self.window()
width = max(window.minimumWidth(), window.width() - delta.x())
geo = window.geometry()
geo.setLeft(geo.right() - width)
window.setGeometry(geo)
def resizeTop(self, delta):
window = self.window()
height = max(window.minimumHeight(), window.height() - delta.y())
geo = window.geometry()
geo.setTop(geo.bottom() - height)
window.setGeometry(geo)
def resizeRight(self, delta):
window = self.window()
width = max(window.minimumWidth(), window.width() + delta.x())
window.resize(width, window.height())
def resizeBottom(self, delta):
window = self.window()
height = max(window.minimumHeight(), window.height() + delta.y())
window.resize(window.width(), height)
def mousePressEvent(self, event):
if event.button() == QtCore.Qt.LeftButton:
self.mousePos = event.pos()
def mouseMoveEvent(self, event):
if self.mousePos is not None:
delta = event.pos() - self.mousePos
self.resizeFunc(delta)
def mouseReleaseEvent(self, event):
self.mousePos = None
class Main(QtWidgets.QMainWindow):
_gripSize = 8
def __init__(self):
QtWidgets.QMainWindow.__init__(self)
self.setWindowFlags(QtCore.Qt.FramelessWindowHint)
self.sideGrips = [
SideGrip(self, QtCore.Qt.LeftEdge),
SideGrip(self, QtCore.Qt.TopEdge),
SideGrip(self, QtCore.Qt.RightEdge),
SideGrip(self, QtCore.Qt.BottomEdge),
]
# corner grips should be "on top" of everything, otherwise the side grips
# will take precedence on mouse events, so we are adding them *after*;
# alternatively, widget.raise_() can be used
self.cornerGrips = [QtWidgets.QSizeGrip(self) for i in range(4)]
#property
def gripSize(self):
return self._gripSize
def setGripSize(self, size):
if size == self._gripSize:
return
self._gripSize = max(2, size)
self.updateGrips()
def updateGrips(self):
self.setContentsMargins(*[self.gripSize] * 4)
outRect = self.rect()
# an "inner" rect used for reference to set the geometries of size grips
inRect = outRect.adjusted(self.gripSize, self.gripSize,
-self.gripSize, -self.gripSize)
# top left
self.cornerGrips[0].setGeometry(
QtCore.QRect(outRect.topLeft(), inRect.topLeft()))
# top right
self.cornerGrips[1].setGeometry(
QtCore.QRect(outRect.topRight(), inRect.topRight()).normalized())
# bottom right
self.cornerGrips[2].setGeometry(
QtCore.QRect(inRect.bottomRight(), outRect.bottomRight()))
# bottom left
self.cornerGrips[3].setGeometry(
QtCore.QRect(outRect.bottomLeft(), inRect.bottomLeft()).normalized())
# left edge
self.sideGrips[0].setGeometry(
0, inRect.top(), self.gripSize, inRect.height())
# top edge
self.sideGrips[1].setGeometry(
inRect.left(), 0, inRect.width(), self.gripSize)
# right edge
self.sideGrips[2].setGeometry(
inRect.left() + inRect.width(),
inRect.top(), self.gripSize, inRect.height())
# bottom edge
self.sideGrips[3].setGeometry(
self.gripSize, inRect.top() + inRect.height(),
inRect.width(), self.gripSize)
def resizeEvent(self, event):
QtWidgets.QMainWindow.resizeEvent(self, event)
self.updateGrips()
app = QtWidgets.QApplication([])
m = Main()
m.show()
m.resize(240, 160)
app.exec_()
to hide the QSizeGrip on the corners where they shouldn't be showing, you can just change the background color of the QSizeGrip to camouflage them to the background. add this to each of the corners of musicamante's answer:
self.cornerGrips[0].setStyleSheet("""
background-color: transparent;
""")
Im trying to recreate a little version of trello in tkinter. Right now im stuck I have a problem when I want to delete frames in a different order. For example: I click on the button and a new frame is generated if I delete that everything works. If I create 3 frames I have to remove them in the same order as I have created them. So I think my problems lies in the pop function but I dont know how to access them manually. When i change the pop function to (1) then I have to delete the second creation first instead of the first.
Here is the code:
from tkinter import *
class Window:
def __init__(self, width, height):
self.root = Tk()
self.width = width
self.height = height
self.root.geometry(width + "x" + height)
class Frames:
def __init__(self):
self.l = Frame(window.root, bg="red", height=300, width=300, relief="sunken")
self.l.place(relwidth=0.3, relheight=0.3)
self.deleteB = Button(self.l, text="X", command=self.delete_frame, bg="blue")
self.deleteB.place(rely=0, relx=0.92)
self.addB = Button(self.l, text="Add", command=self.add_note, bg="blue")
self.addB.place(rely=0, relx=0.65)
def delete_frame(self):
self.l.pack()
self.l.pack_forget()
self.l.destroy()
frames.pop()
def add_note(self):
self.note_Label = Label(self.l, text="Clean the room")
self.note_Label.pack(padx=20, pady=10)
self.delete_Note = Button(self.note_Label, text="X", command=self.del_Note)
self.delete_Note.pack(padx=5, pady=5)
def del_Note(self):
self.note_Label.pack_forget()
self.note_Label.destroy()
class Note:
def __init__(self):
pass
class DragNDrop:
def __init__(self):
pass
def make_draggable(self, widget):
widget.bind("<Button-1>", self.on_drag_start)
widget.bind("<B1-Motion>", self.on_drag_motion)
def on_drag_start(self, event):
widget = event.widget
widget._drag_start_x = event.x
widget._drag_start_y = event.y
def on_drag_motion(self, event):
widget = event.widget
x = widget.winfo_x() - widget._drag_start_x + event.x
y = widget.winfo_y() - widget._drag_start_y + event.y
widget.place(x=x, y=y)
class Buttons:
def __init__(self):
self.button = Button(window.root, width=20, height=20, bg="blue", command=self.add_frames)
self.button.pack()
def add_frames(self):
frames.append(Frames())
print(frames)
window = Window("800", "600")
frames = []
drag = DragNDrop()
button = Buttons()
while True:
for i in frames:
drag.make_draggable(i.l)
window.root.update()
If someone has an Idea or workaround that would be nice to know.
Also I have another Idea instead of destroying them I could just hide them but in the end that makes the programm really slow at some point.
Here is the error: _tkinter.TclError: bad window path name ".!frame2"
Your code needs to remove the frame from the list. Instead, you're calling pop which always removes the last item. That causes you to lose the reference to the last window, and one of the references in frames now points to a window that has been deleted (which is the root cause of the error)
Instead, call remove:
def delete_frame(self):
self.l.destroy()
frames.remove(self)
I am trying to add a second frame inside my main class and put there a few widgets. I created a frame by using a method and assigned one of the widget to that frame but the problem is it does not appear.
I provided below piece of code with window configuration and 2x Labels which are at the main frame (Both appear correctly) and one in the new frame which appearing problem.
If you have some idea, please help me :)
import tkinter as tk
class MainApplication(tk.Tk):
def __init__(self):
super().__init__()
# Adding a background picture
self.background_img = tk.PhotoImage(file="in office.png")
back_ground_img_label = tk.Label(self, image=self.background_img)
back_ground_img_label.pack(fill="both", expand=True)
# Adjusting the window
width_of_window = 1012
height_of_window = 604
screen_width = self.winfo_screenwidth()
screen_height = self.winfo_screenheight()
x_coordinate = int((screen_width / 2) - (width_of_window / 2))
y_coordinate = int((screen_height / 2) - (height_of_window / 2) - 30)
self.geometry(
f"{width_of_window}x{height_of_window}+{x_coordinate}+{y_coordinate}"
)
self.bet_frame()
bet_value_label_bg = tk.Label(self)
bet_value_label_bg.place(x=462, y=300)
coin_button_1 = tk.Button(self.frame)
coin_button_1.place(x=233, y=435)
def bet_frame(self):
self.frame = tk.Frame(width=1012, height=604)
self.frame.pack()
if __name__ == "__main__":
MainApplication().mainloop()
The only thing you put in the self.frame is the coin_button_1, but as you place it at (233, 435) is is hidden below the main window self.
Personally I would not use place but rather either pack or even better grid to place the widgets on the screen (see Setting Frame width and height)
So if you change def bet_frame(self) as follows it will be visible
...
bet_value_label_bg = tk.Label(self, text='value')
bet_value_label_bg.place(x=462, y=300)
def bet_frame(self):
self.frame = tk.Frame(master=self, width=1012, height=604)
self.frame.pack()
coin_button_1 = tk.Button(self.frame, text='coin button')
coin_button_1.pack()
...
Note the bet_value_label_bg shows up in the middle of the picture and you may have to expand the main window to make the self.frame visible, depending on the size of the picture.
I have the following piece of code that takes an image within a canvas and then whenever I click the paint function draws a dot over it.
Everything is working fine except that the paint function is not working as expected.
Desirable output
Click event draws a dot. No need to drag the on click event
Actual output
I have to drag the on mouse click event to see a drawing on the canvas.
I guess there might be a slight problem with the paint function. However, I haven't been able to know what it is exactly.
from tkinter import *
from PIL import Image, ImageTk
class Main(object):
def __init__(self):
self.canvas = None
def main(self):
master = Tk()
# Right side of the screen / image holder
right_frame = Frame(master, width=500, height=500, cursor="dot")
right_frame.pack(side=LEFT)
# Retrieve image
image = Image.open("./image/demo.JPG")
image = image.resize((800, 700), Image.ANTIALIAS)
photo = ImageTk.PhotoImage(image)
# Create canvas
self.canvas = Canvas(right_frame, width=800, height=700)
self.canvas.create_image(0, 0, image=photo, anchor="nw")
self.canvas.pack()
self.canvas.bind("<B1-Motion>", self.paint)
mainloop()
def paint(self, event):
python_green = "#476042"
x1, y1 = (event.x - 1), (event.y - 1)
x2, y2 = (event.x + 1), (event.y + 1)
self.canvas.create_oval(x1, y1, x2, y2, fill=python_green, outline=python_green, width=10)
if __name__ == "__main__":
Main().main()
Fix:
Added these two methods:
def on_button_press(self, event):
self.x = event.x
self.y = event.y
def on_button_release(self, event):
python_green = "#476042"
x0,y0 = (self.x, self.y)
x1,y1 = (event.x, event.y)
changed canvas to this:
self.canvas.bind("<ButtonPress-1>", self.on_button_press)
self.canvas.bind("<ButtonRelease-1>", self.on_button_release)
When you only click and don't move the mouse, B1-Motion isn't triggering.
To bind to mouse press (as well as mouse moving), you can add self.canvas.bind("<ButtonPress-1>", self.paint) before the mainloop.
Ok guys.
I am trying to generate 10 balls of random color in Tkinter canvas when I click the generate button.
Program works, and random color choice works for the ball, but I only get one ball generated at a time.
Every time I click the button it randomly moves the ball around, but all I want is 10 balls in 10 random positions at a time. I am using Python 3.4 on a Linux box.
This is a code I've got:
from tkinter import *
import random # to generate random balls
colors = ["red", "blue", "purple", "green", "violet", "black"]
class RandomBalls:
"""
Boilerplate code for window in Tkinter
window = Tk()
window.title("Random title")
window.mainloop()
"""
def __init__(self):
"""
Initialize the window and add two frames, one with button, and another one with
canvas
:return:
"""
window = Tk()
window.title("Random balls")
# A canvas frame
frame1 = Frame(window)
frame1.pack()
self.canvas = Canvas(frame1, width = 200, height = 300, bg = "white")
self.canvas.pack()
# A button frame
frame2 = Frame(window)
frame2.pack()
displayBtn = Button(frame2, text = "Display", command = self.display)
displayBtn.pack()
window.mainloop()
def display(self):
for i in range(0, 10):
self.canvas.delete("circle") # delete references to the old circle
self.x1 = random.randrange(150)
self.y1 = random.randrange(200)
self.x2 = self.x1 + 5
self.y2 = self.y1 + 5
self.coords = self.x1, self.y1, self.x2, self.y2
self.canvas.create_oval(self.coords, fill = random.choice(colors), tags = "circle")
self.canvas.update()
RandomBalls()
Every time through your loop you are deleting everything you created before, including what you created the previous iteration. Move the delete statement outside of the loop:
def display(self):
self.canvas.delete("circle")
for i in range(0, 10):
...