【Summary】
By tkinter, python. I set scrollbar on Canvas ... Then that has been succeeded.
But missing knob in scrollbar.
【Background】
This is my application that developing now.
App's purpose is simple. Get some icons from target URL, Then put as tile in Window.
Application Window graphic
As you see, Can't put all icons in initial window size.
So I want to use scrollbar, Then scrolldown to show below icons.
Now succeeded put scrollbar at right side. But in that bar missing knob(thumb).
So this isn't working as scrollbar (TωT)
【Question】
How to make code to this vertical scrollbar working?
This is scrollbar build section in my src file.
Already exists scrollbar, It's almost fine... But maybe missing something.
# Make vertical scrollbar to see all stickers -----------------------
outCV = tk.Canvas(self.iconsFrame, width=GUIController.__windowWidth, height=GUIController.__windowHeight)
scrollbar = tk.Scrollbar(self.iconsFrame, orient=tk.VERTICAL)
scrollbar.config(command=outCV.yview)
scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
outCV.configure(yscrollcommand=scrollbar.set)
outCV.pack()
# --------------------------------------------------------------------
gridRow = 0
gridCol = 0
for i, tkimg in enumerate(self.tkimgs) :
# Put icons as tile.
Please give me your knowledge.
(FYI) https://github.com/we-yu/L_SL/blob/develop/Canvas_in_Canvas/src/GUICtrl.py Line:196
I found already how to solve it by myself.
There are 2 points in my case.
Should be set scrollregion
Scrollbar works for only Canvas. So, on my case. Need overlapped frames and canvases.
Solving way
self.outerCV = tk.Canvas(self.iconsFrame, width=GUIController.__windowWidth, height=GUIController.__windowHeight)
scrollbar = tk.Scrollbar(self.iconsFrame, orient=tk.VERTICAL)
scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
scrollbar.config(command=self.outerCV.yview)
self.outerCV.config(scrollregion=(0, 0, 2000, 2000), yscrollcommand=scrollbar.set)
self.outerCV.pack(fill=tk.BOTH)
galleryFrame = tk.Frame(self.outerCV)
self.galleryTag = self.outerCV.create_window((0, 0), window=galleryFrame, anchor=tk.NW, width=self.outerCV.cget('width'))
Put Basement-frame at bottom of window. Then put Canvas on that. Scrollbar attaches on this Canvas.
But if put Canvas on this Canvas, Scrollbar works for scroll, But window won't be working.
So, put frame on scrollbar-canvas. Then Main graphic canvases on that frame.
[Canvas-1][Canvas-2][Canvas-3]...
[Frame for gallery]
[Canvas for Scrollbar]
[Basement frame]
Related
Is there any way to remove the border around a checkbutton? I have tried relief = "flat", offrelief = "flat", borderwidth = 0 and highlightthickness = 0 and none of these have made any difference. I also found This question, but the first answer doesn't work, and the second involves recreating the widget, but I wish to use the Checkbutton widget. The reason I need to remove the border is that I'm wrapping the button in a frame to change it's border, and If I can't remove the default border, it isn't possible.
This is the border I mean:
I am working on a color matching learning game. When you click the colored square, a pop up window will show you the name of the color, typed in the corresponding color, as well as pronounce the color.
During development, I ran into an issue where tkinter would not display my .gif image (which is the typed color) on the top level window, which opens after a color is selected.
I started adding additional widgets to the top level window to attempt to figure out the issue.
However, I accidentally left of the parentheses at the end of pack on the second label I added.
Sure enough, my image showed.
When I went back to add the missing parentheses, my image stopped showing??
def callback(event):
print ("clicked at", event.x, event.y)
if 30 < event.x < 120:
print("Red")
top = tk.Toplevel()
diagrams = tk.PhotoImage(file='Red.gif')
logolbl= tk.Label(top, text = "Red", image = diagrams).pack()
btn = tk.Button(top, text="Back").pack()
##### this is the label I am referring to #####
tk.Label(top, text = "why does this fix it?").pack
if 150 < event.x <240 :
print("Green")
if 270 < event.x < 370:
print("Blue")
This is a screen shot of it displaying the image, with the missing parentheses
This is a screen shot of the second label commented out, and my image not showing
Has anyone experienced this?
I mean technically I can work with this, however, I understand it is incorrect.
I'd like to have an understanding of what I am doing wrong, and what is happening "behind the scenes"
I am trying to make an application for a school project, one of the features is a messaging service where users can message each other, this is accessed via a button in which the messaging GUI is loaded. I have already added a canvas as the background for the main GUI at the start of the program but for the message interface I have added another canvas which overlaps and will be using a scrollbar to scroll through the messages and display them.
In essence my problem is that I would like to position another canvas on top of the main canvas using co-ordinates and add a scrollbar which only fits to the right hand side of this smaller canvas.
Thanks in advance :)
I have tried to add a scrollbar to it using pack(), grid(), place() and canvas.create_window() however in all instances the scrollbar either does not appear, does not fill the entire right hand side of the second canvas, or is not placed in the correct position. The closest I got was with the place() function where I have managed to position the scrollbar and canvas using "relx", "rely" and "relheight" however the scrollbar is not scrolling the canvas.
root = Tk() #creates the GUI
root.title("Eclass")
root.iconbitmap(default='icon.ico') #sets icon
root.state('zoomed')
backgroundcolour = root.cget("bg")
screen_width = root.winfo_screenwidth() - 15
screen_height = root.winfo_screenheight()
canvas = Canvas(root, width = screen_width, height = screen_height)
def messaging():
canvas.delete("all")
msg_canvas = Canvas(canvas, width = 1530, height = 730, bg = "red")
#canvas.create_window(1123,600, window = msg_canvas) this is where I tried to add the second canvas using the create_Window function
msg_canvas.place(relx=0.186, rely=0.227)
msg_scrollbar = Scrollbar(canvas, orient="vertical",command=msg_canvas.yview)
msg_scrollbar.place(relx=0.975,rely=0.2295, relheight = 0.717)
msg_canvas.config(scrollregion=msg_canvas.bbox(ALL))
I expect the canvas to be placed within the current co-ordinates given via relx and rely or in previous trial the co-ordinates in canvas.create_window(), I then expect the msg_scrollbar to be on the right hand side of msg_canvas and fill to its Y (the height of the scrollbar should be the same as the height of the canvas). In actuality the canvas and scrollbar are in the correct co-ordinates however the scrollbar does not scroll the msg_canvas even after moving it.
, In essence, my problem is that I would like to position another canvas on top of the main canvas using co-ordinates and add a scrollbar which only fits the right-hand side of this smaller canvas.
I recommend against using place. Both pack and grid are better for creating code that is responsive to changes in resolution, window size, and fonts.
IMHO, the simplest solution is to use pack to put the main canvas at the bottom, then in the remaining space put the scrollbar on the right and the secondary canvas on the left. Note: the order is important, as each time you call pack it will use up all of the space on the given side, reducing the space available to future widgets.
canvas.pack(side="bottom", fill="both", expand=True)
msg_scrollbar.pack(side="right", fill="y")
msg_canvas.pack(side="left", fill="both", expand=True)
You can accomplish the same thing with grid, but it requires additional lines of code to configure row and column weights. With grid order isn't as important since you are explicitly setting rows and columns.
msg_canvas.grid(row=0, column=0, sticky="nsew")
msg_scrollbar.grid(row=0, column=1, sticky="ns")
canvas.grid(row=1, column=0, columnspan=2, sticky="nsew")
root.grid_rowconfigure((0,1), weight=1)
root.grid_columnconfigure(0, weight=1)
I am trying to put a QtableWidget inside a QScrollArea (only one widget) to be able to scroll it vertically and horizontaly (I have reasons not to use scrollbars in Qtablewidget ). However, no scrollbar appears even though the tableWidget can’t fit inside the window so I set QtCore.Qt.ScrollBarAlwaysOn, and now they are there but they are gray and still I can't scroll.
Here is my code:
class Table(QtGui.QDialog):
def __init__(self, parent=None):
super(Table, self).__init__(parent)
layout = QtGui.QGridLayout()
tableWidget = QtGui.QTableWidget()
#.... set up and populate tableWidget here 1000rows-10col ....
myScrollArea = QtGui.QScrollArea()
myScrollArea.setWidgetResizable(True)
myScrollArea.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
myScrollArea.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOn)
myScrollArea.setWidget(tableWidget)
layout.addWidget(myScrollArea)
self.setLayout(layout)
self.setMinimumSize(1000, 700)
I am begginer with PyQt and I don't really understand layouts and containers, so I can't figure out what I'm doing wrong. Please point me in right direction, help would be appreciated.
QtScrollBar by default has horizontal and vertical scrollBar.
tablewidget by default has horizontal and vertical scrollBar. so i have made it off.
just using the resize event i have resized width and height of tablewidget.
class MainWin(QtGui.QDialog):
def __init__(self,parent=None):
QtGui.QDialog.__init__(self,parent)
self.table =QtGui.QTableWidget(100,4)
self.table.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.table.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
lay = QtGui.QGridLayout()
self.sc = QtGui.QScrollArea()
self.sc.setWidget(self.table)
lay.addWidget(self.sc,0,0)
self.setLayout(lay)
def resizeEvent(self,event):
self.table.resize(self.sc.width(),self.sc.height())
def main():
app=QtGui.QApplication(sys.argv)
win=MainWin()
win.show()
sys.exit(app.exec_())
main()
I finally get it:
I've used resizeColumnsToContents() and resizeRowsToContents() to make the columns/rows of the table adjust to the data - text, but that doesn't do the same thing with the Table itself - table height and width stays the same. So in order to make table to be sized around the rows and columns I've used this:
self.table.resizeRowsToContents()
self.table.resizeColumnsToContents()
self.table.setFixedSize(self.table.horizontalHeader().length(), self.table.verticalHeader().length())
and now I can scroll with QScrollArea's scrollbars through entire table.
I am using PyQt to build a small application for viewing images. When I click on the image I would like to alter the color of the pixels I have clicked:
Schematically my current code looks like this:
scene = QtGui.QGraphicsScene()
view = QtGui.QGraphicsView( scene )
image = QtGui.QImage( "image.png" )
pixmap = QtGui.QGraphicsPixmapItem( QtGui.QPixMap.fromImage( image ))
scene.addItem( pixmap )
...
...
def mousePressEvent(self , event):
print "Click on pixmap recorded - setting Pixel to red"
image.setPixel( event.pos() , RED.rgb())
The code 'works' in the sense that the mousePressEvent() method is called, and the image.setPixel() method does not give any errors, but nothing happens on the screen. Any tips on how to get the updated pixels to be displayed?
Joakim
To make changes appear, you need to reload image
self.image.setPixel(event.pos(), RED.rgb())
self.pixmap.setPixmap(QtGui.QPixmap.fromImage(self.image))
But I'm not sure that it's a good way. If you don't need to save modified image, I'd add some circles (e.g. addEllipse) instead modifying pixels.
Also, don't forget to map window coordinates to image.