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?
Related
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
Please excuse my ignorance as I'm new to Python and am experimenting.
I am creating a dashboard that allows users to open a file. When a user opens a file, the software adds a row with the file name, progress bar and a few buttons all on the same row. The row creation is done by calling a function which increments the row value every time its called to ensure it doesn't replace the existing row but instead adds another row beneath it to represent the latest file opened by the user.
Lets say there are two rows on the dashboard with their respective file names and buttons. My problem is when I go to press the button on the first row, it thinks that I'm pressing the button on the second row simply because the counter is set to 2 when adding a second row and I am trying to identify which button the user is pressing by checking the row but am unable to do that due to the counter.
Is there anyway I can "bind" the row value to the button when declaring it when calling the create button function so that they keep some form of ID and I can tell which row the user is interacting with?
I have tried assigning the button an ID when calling the function to identify which button is being pressed and on what row, but the button gets overwritten on all rows when the function is called again.
I have also tried to check what button the user is pressing by checking the text of the button, but that also gets overwritten when the function is re-called regardless if the names of the buttons are different on the UI itself.
Any help is very much appreciated. Hopefully I was clear enough.
def OpenFile(self): # user opening file which creates row with button
print("Opening")
btnCreation(self)
def btnCreation(self): # function to create buttons dynamically
incrementFunction(self)
global EXEBtn
EXEBtn = Button(Main_frame,
text="Execute",
width=8,
command=self.Execute)
EXEBtn.grid(row=RowCounter, column=2, padx=3)
def incrementFunction(self):
global RowCounter
RowCounter = RowCounter + 1
def Execute(self):
# check which row the execute button was pressed on to do something
A simple and quick solution is just to give the function the current RowCounter value with a lambda expression like this:
def btnCreation(self): # function that creates button dynamically
incrementFunction(self)
global EXEBtn
EXEBtn = Button(Main_frame,
text="Execute",
width=8,
command=lambda e=RowCounter: self.Execute(e))
EXEBtn.grid(row=RowCounter, column=2, padx=3)
The specific change here is command=lambda e=RowCounter.get(): self.Execute(e), changing the way the buttons command works. Basically it is creating a lambda expression that saves the value of RowCounter, which will be passed to the Execute() function when the button is pressed.
I'm trying to make a box that allows you to select some variables, and re-order the ones that are selected. So the LEFT box starts filled, the RIGHT box starts empty. You move items from the left to the right, and on the right you can re-arrange their order (with the up and down buttons). This lets you pick what items you want and in what order (for sorting purposes in another section of the program).
The layout I'm going for looks like of like this:
Unfortunately, it's coming out like... well... :-(
The functionality I'm looking for all works. Yay. I am just having a very hard time with the layout. I think if I can reach the following four primary objectives, I'll be set.
How can I get the OK and CANCEL buttons on the bottom instead of above the multis?
How can I get the multis to have a pre-set size (let's say... 10)
How can I get the arrow buttons to be stacked vertically instead of horizontally?
How can I get the arrow buttons to be between the two multis?
I figure each of these particular objectives are probably one-liners, perhaps a little bit of plumbing here and there...
On a side note, I'm using GridLayout - this might be a poor choice. Is there a better choice for something like this?
Without further ado, here's the code that generates this horrid mess...
#Override
protected Control createDialogArea(Composite parent) {
parent.getShell().setText("Multi-sort");
Composite dialogcomp = new Composite(parent, SWT.NONE);
dialogcomp.setLayout(new GridLayout(3, false));
available = new List(getShell(), SWT.BORDER | SWT.V_SCROLL);
for(String t : MultiSortDialog.availableNames) {
available.add(t);
}
used = new List(getShell(), SWT.BORDER | SWT.V_SCROLL);
for(String t : MultiSortDialog.usedNames) {
used.add(t);
}
createButton(parent, ADD, ">", false);
createButton(parent, REM, "<", false);
createButton(parent, UP, "^", false);
createButton(parent, DOWN, "V", false);
return dialogcomp;
}
I would suggest you simple use the Dialog's default OK and Cancel buttons and not trying to lay out your own. SWT has a nice system for placing them in the system default location (i.e., on Mac OS, the OK button will be on the right, which is the correct location.)
Don't use Dialog.createButton() to create buttons. This creates a button on your dialog which, although it sounds like what you want to do, actually isn't. This creates a button in the style of OK or Cancel buttons, expected to be placed in the button bar composite that the Dialog class owns and styled appropriately for the bottom row OK/Cancel buttons. You want to create a new Button in the composite you're creating. That is:
Button addButton = new Button(dialogcomp, SWT.PUSH);
addButton.setText(">");
addButton.addSelectionListener(...);
To stack the buttons vertically, create a new composite inside dialogcomp to contain them.
To put the arrow buttons between the Lists, you need to ensure that you add things in the correct order. With a GridLayout, you need to add widgets in the order that you want them to appear.
Other points:
Don't change the title of the dialog by calling Shell.setText(). Call setText() in your
Don't try to parent your Lists inside the parent shell. You're given a composite to put things in. This will wreak havoc on your layouts. You're basically hoisting widgets up into things you don't own and don't layout. Instead, put it in the Composite you created.
You may also wish to create buttons with the type SWT.ARROW | SWT.LEFT instead of simply drawing a < sign. It may be more visually appealing. Just something to investigate.
A simple rearrangement of your code, creating Buttons properly, and creating a new composite to hold the buttons, will get you much closer:
Composite dialogcomp = new Composite(parent, SWT.NONE);
dialogcomp.setLayout(new GridLayout(3, false));
available = new List(dialogcomp, SWT.BORDER | SWT.V_SCROLL);
for(String t : MultiSortDialog.availableNames) {
available.add(t);
}
Composite buttonComposite = new Composite(dialogcomp, SWT.NONE);
buttonComposite.setLayout(new GridLayout(1, false));
Button addButton = new Button(buttonComposite, SWT.PUSH);
addButton.setText(">");
Button removeButton = new Button(buttonComposite, SWT.PUSH);
removeButton.setText("<");
Button upButton = new Button(buttonComposite, SWT.PUSH);
upButton.setText("^");
Button downButton = new Button(buttonComposite, SWT.PUSH);
downButton.setText("v");
used = new List(dialogcomp, SWT.BORDER | SWT.V_SCROLL);
for(String t : MultiSortDialog.usedNames) {
used.add(t);
}
This will probably get you pretty close to what you want. However, you will probably want to apply GridDatas for each of your instances. For example, your two Lists will probably want to grab and fill horizontally and vertically to fill the layout as the Dialog is resized. But I'll leave that as an exercise for the reader.
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);
}
}
I'm trying to set the assigned value to a YUI Menu Button in order to use values from previous operations.
Something like remembering previous choices.
For label I already know that I can change it with:
button.set("label", "my label")
unfortunatelly I cannot change the value using: button.set("value", "my value")
Any ideia on how can I do this?
Other way would be to force a selection, but I have no ideia on how to do that.
Thanks
just found out that you can use:
var menu = button.getMenu();
var item = menu.getItem(index);
button.set("selectedMenuItem", item);
all that is left for me now is finding the needed index