I am trying to add information to my Listbox and keeping it the size I state when I configure it. Here is my code for the Listbox with the scrollbar and an image of what it looks like.
Picture of the listbox.
taskList = Listbox(setBox, bg="#1B2834",fg="white")
taskList.configure(width=183,height=39)
taskList.pack(side=LEFT,fill=BOTH)
taskScroll = Scrollbar(setBox)
taskScroll.configure(bg="#1B2834",width=18)
taskScroll.pack(side = RIGHT, fill = BOTH)
taskList.config(yscrollcommand = taskScroll.set)
taskScroll.config(command = taskList.yview)
Now, when i click a button the command is to execute this following code:
def savetasks():
#make tasks
letters = string.ascii_uppercase
result_str = ''.join(random.choice(letters) for i in range(4))
num = str(random.randrange(0,9))
taskIDnum = num+result_str
taskIDLBL = Label(taskList, text=taskIDnum,bg="#1B2834", fg="White")
taskIDLBL.configure(padx=20,pady=10)
taskIDLBL.pack()
This code works fine as well, creating new labels with a random ID but it resizes the listbox to look like this...
Picture of the list box after clicking the button to execute the command.
Lastly, the scroll bar is not scrollable and when I create a lot of id's that end up going off my screen I cannot use the scroll bar to scroll down to see them, is there a way to not let the Listbox be resized and is it possible to set the Listbox with max and min-height?
If there is an easier way to do this without using a Listbox please let know, I just need to able to scroll down to see all the other id's and I didn't see any other way to use a scroll bar, that I NEEDED to use a Listbox
Related
The following code creates a standard listbox in tkinter. In normal use, after the user makes the first listbox selection with a mouse click, subsequent selections can be made either by clicking again with the mouse, or by using the up/down cursor keys. Both of these (mouse click and cursor keys) correctly trigger ListboxSelect and change the value of SelectedIndex using the associated function UserClickedSelection(event).
The code also includes a function that allows me to set a listbox selection programmatically. This works perfectly, and correctly changes SelectedIndex using the SetSelection(index) function. But...and this is the problem...after making a selection programmatically, the up/down arrow keys no longer function. The user needs to make the next selection using the mouse, and then the up/down arrow keys once again function normally.
import tkinter as tk
root = tk.Tk()
root.geometry("300x300")
SelectedIndex = 0
def UserClickedSelection(event): # get user selection
global SelectedIndex
SelectedIndex = mylistbox.curselection()[0]
def SetSelection(index): # set selection
global SelectedIndex
mylistbox.selection_clear(0,tk.END)
mylistbox.selection_set(index)
mylistbox.activate(index)
SelectedIndex = mylistbox.curselection()[0]
mylistbox = tk.Listbox(root,activestyle="none")
mylistbox.place(x=0,y=0)
mylistbox.config(selectmode=tk.BROWSE)
mylistbox.config(exportselection=False)
mylistbox.bind('<<ListboxSelect>>',UserClickedSelection)
mylist = ['Zero','One','Two','Three','Four','Five']
mylistbox.insert(0,*mylist)
# Using function: set selection to index 2
SetSelection(2)
root.mainloop()
As you can see, in the code I've used the programmatic function to select index 2 of the listbox. This works fine, but the up/down arrow keys do not work until another selection is made afterwards using a mouse click. So there is clearly a difference between a "real" user selection and my "programmatic" selection. Is there some way to rectify this? I need the up/down arrow keys to work consistently. Thanks in advance for any assistance.
If I understand the problem correctly, you just need to make sure the listbox has focus.
def SetSelection(index): # set selection
...
mylistbox.focus_set()
Disclaimer: I have only begun to learn about Python. I took a crash course just to learn the very basics about a month ago and the rest of my efforts to learn have all been research thru Google and looking at solutions here in Stack Overflow.
I am trying to create an application that will read all PDF files stored in a folder and extract their filenames, page numbers, and the contents of the first page, and store this information into a 2D set. Once this is done, the application will create a tkinter GUI with 2 listboxes and 1 text box.
The application should display the PDF filenames in the first listbox, and the corresponding page numbers of each file in the second listbox. Both listboxes are synched in scrolling.
The text box should display the text contents on the first page of the PDF.
What I want to happen is that each time I click a PDF filename in the first listbox with the mouse or with up or down arrow keys, the application should display the contents of the first page of the selected file in the text box.
This is how my GUI looks and how it should function
https://i.stack.imgur.com/xrkvo.jpg
I have been successful in all other requirements so far except the part where when I select a filename in the first listbox, the contents of the first page of the PDF should be displayed in the text box.
Here is my code for populating the listboxes and text box. The contents of my 2D set pdfFiles is [['PDF1 filename', 'PDF1 total pages', 'PDF1 text content of first page'], ['PDF2 filename', 'PDF2 total pages', 'PDF2 text content of first page'], ... etc.
===========Setting the Listboxes and Textbox=========
scrollbar = Scrollbar(list_2)
scrollbar.pack(side=RIGHT, fill=Y)
list_1.config(yscrollcommand=scrollbar.set)
list_1.bind("<MouseWheel>", scrolllistbox2)
list_2.config(yscrollcommand=scrollbar.set)
list_2.bind("<MouseWheel>", scrolllistbox1)
txt_3 = tk.Text(my_window, font='Arial 10', wrap=WORD)
txt_3.place(relx=0.5, rely=0.12, relwidth=0.472, relheight=0.86)
scrollbar = Scrollbar(txt_3)
scrollbar.pack(side=RIGHT, fill=Y)
list_1.bind("<<ListboxSelect>>", CurSelect)
============Populating the Listboxes with the content of the 2D Set===
i = 0
while i < count:
list_1.insert(tk.END, pdfFiles[i][0])
list_2.insert(tk.END, pdfFiles[i][1])
i = i + 1
============Here is my code for CurSelect function========
def CurSelect(evt):
values = [list_1.get(idx) for idx in list_1.curselection()]
print(", ".join(values)) ????
========================
The print command above is just my test command to show that I have successfully extracted the selected item in the listbox. What I need now is to somehow link that information to its corresponding page content in my 2D list and display it in the text box.
Something like:
1) select the filename in the listbox
2) link the selected filename to the filenames stored in the pdfFilename 2D set
3) once filename is found, identify the corresponding text of the first page
4) display the text of the first page of the selected file in the text box
I hope I am making sense. Please help.
You don't need much to finish it. You just need some small things:
1. Get the selected item of your listbox:
selected_indexes = list_1.curselection()
first_selected = selected_indexes[0] # it's possible to select multiple items
2. Get the corresponding PDF text:
pdf_text = pdfFiles[first_selected][2]
3. Change the text of your Text widget: (from https://stackoverflow.com/a/20908371/8733066)
txt_3.delete("1.0", tk.END)
txt_3.insert(tk.END, pdf_text)
so replace your CurSelect(evt) method with this:
def CurSelect(evt):
selected_indexes = list_1.curselection()
first_selected = selected_indexes[0]
pdf_text = pdfFiles[first_selected][2]
txt_3.delete("1.0", tk.END)
txt_3.insert(tk.END, pdf_text)
I am making a battleships program, and after i created a list of identical buttons for a grid and inserting them all into one list, i want to be able to choose the button just clicked and delete it. How can i achieve this?
l = []
for i in range (100):
b = Button(battleship.frame, height = 1, width = 3, command = )
l.append(b)
#this is a snippet of what i have now but i am not sure what to do.
I have tried using lambda to give each button something unique to make them all different but i don't think this helps me in selecting the specific button that was just clicked.
Any suggestions?
Good day all,
I have a simple Dialog started after click button, I post my code:
Dialog dialog;
super();
dialog = new Dialog("Dialog example");
dialog.addText(strFmt("Text to show"));
dialog.addText(strfmt("SecondText to show"));
dialog.run();
I will show a Dialog window loollike this :
It's possible to set the position from code the Text: Text to show ?
For example, if I want to centered position the second text how should I do?
I tried to put blanks in the code:
dialog.addText(strfmt(" Text to show"));
But nothing changes, and this I think not good method.
I saw any suggestions on Web but or I do not use well or is not suitable for me: Example-suggestions.
Exist a method to do what I want?
Thanks for help,
enjoy!
You can center the text using the form control:
Dialog dialog = new Dialog("Dialog example");
DialogText t1 = dialog.addText(strFmt("Text to show"));
DialogText t2 = dialog.addText(strfmt("SecondText to show"));
FormStaticTextControl c1 = t1.control();
c1.widthMode(FormWidth::ColumnWidth);
c1.alignment(FormAlignment::Center);
dialog.run();
The first control is now centered (to the surrounding group).
You have to give it ColumnWidth, otherwise the control would have the minimum size and the centering would have no effect.
I was wondering if it was possible to replace one control in a TableLayoutPanel with another at runtime. I have a combo box and a button which are dynamically added to the TableLayoutPanel at runtime, and when the user selects an item in the combo box and hits the button, I'd like to replace the combobox with a label containing the text of the selected combo box item.
Basically, if I could simply remove the control and insert another at it's index, that would work for me. However I don't see an option like "splice" or "insert" on the Controls collection of the TableLayoutPanel, and I was wondering if there was a simple way to insert a control at a specific index. Thanks in advance.
Fixed this by populating a panel with the two controls I wanted to swap and putting that into the TableLayoutPanel. Then I set their visibility according to which I wanted to see at what time.
This is what I've been able to come up with for what I needed. It gets the position of the ComboBox and makes a new label using the selected value.
// Replaces a drop down menu with a label of the same value
private void lockDropMenu(ComboBox dropControl)
{
TableLayoutPanelCellPosition pos = myTable.GetCellPosition(dropControl);
Label lblValue = new Label();
myTable.Controls.Remove(dropControl);
if (dropControl.SelectedItem != null)
{
lblValue.Text = dropControl.SelectedItem.ToString();
lblValue.Font = lblValue.Font = dropControl.Font;
// Just my preferred formatting
lblValue.AutoSize = true;
lblValue.Dock = System.Windows.Forms.DockStyle.Fill;
lblValue.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
myTable.Controls.Add(lblValue, pos.Column, pos.Row);
}
}