Using TTkAppTemplate #498
Replies: 4 comments 19 replies
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In my application I use different HEADER widget for each different mode of the program, and I found the similar issue as you describe so I had to place the widgets inside a TTkContainer and then place that into the TTkAppTemplate() using the position argument, such as... If nothing was placed there at first then nothing shows up when it's later changed, but putting everything inside different Container widgets solves it. I assume it has the same behaviour for MAIN as for the HEADER position, except if your widget is scrollable then you might also need to handle |
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I tried your approach but for me it doesn't work but maybe I'm in error. I tried this: I triend to exchange the order of self.container_table.addWidget(xxx) before the at.setItem but the result doesn't change....nothing happen. A little detail: when I select the menu for the terminal container, in the log I see: DEBUG:(TerminalHelper) /home/luca/mect/projects/erprodmacro/tui/TermTk/TTkWidgets/TTkTerminal/terminalview.py:315 self._newSize=(0, 0) I don't know if it is important but a size o 0,0 is strange. |
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Try using the or I think the size has to be acquired when the widget is set into the container rather than afterwards, i.e: |
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I tried but it doesn't change anything :( |
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Taking a look to the source code, when I load another widget/item, the lib call removeItems/removeWidgets..it seems that this remove fails in someway because what is present remain in place and fully functional. If I exchange the widget the previous remain in place and is fully functional. |
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I hope that @ceccopierangiolieugenio read this and give me an advice on "how to" load dynamically widgets/items. I tried container, frame ...but without success. I read the source code of the demo because it apparently do what I need but its approach is different: it loads everything and show/hide what is in the case. My approach cannot be that, but must be a dynamic loading. |
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@lucaminifreelance-art I am not completely sure about your request, can you provide me a simple drawing of the results? Are you interested in something like this? Screen.Recording.2025-10-29.at.14.42.37.002.movthe menu at the top-left 
is a custom widget so it is not what you are asking for (unless you want to implement something similar) the menu at the center instead 
are 3 menu with zero items each. I just attached a switching routine at their keypress. the trick is normally to use The switch happen hiding all of them and show only the one that need to be shown. widget.setVisible(visible)
panel.layout.addWidget(widget)
panel.widgets.append(widget)
mb = panel.menuBar.addMenu(name, alignment=ttk.TTkK.LEFT_ALIGN)
@ttk.pyTTkSlot()
def _showBottomTab():
for _w in self._panels[self.Position.BOTTOM].widgets:
_w.hide()
widget.show()
mb.menuButtonClicked.connect(_showBottomTab) |
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The visual effect is the same but not the approach. This is similar to what demo do. I don't want draw everything and then show/hide objects, but, I would clear the previous obj and draw others on an event (menu callback for example). Is it possible?. Anyway, asap I'll prepare a little example of what I would do. |
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In the callback instead of show/hide you can add/remove widgets (less advisable because you end up creating tons of widgets that may not be disposed properly). |
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For the example I need more time...this is a video for the issue: |
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0:09: 0:17 this is the core of all my previous questions, and yes, I present OTHER data from a database (not the previous one); yes without any interaction I see that I can switch from terminal to this table/property freely without any issues 0:23 yer I redo the same thing to show that with no interaction it works fine 0:29 yes! 0:39 the flick/blink I think is due to the ttk.TTkHelper.rePaintAll() tha I tried to do; no, I have nothing of relevant in log. yes, without interaction I can switch freely (I believe...I don't tried more than 10 times). |
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i suspect there is something odd in the way you populate the tree that may affect the new terminal being shown. |
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The table and property editor is perfectly functional once the issue is reproduced. |
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How do you detect which cell is selected? |
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sorry, i forgotten the source for formtable.py, this is the missing file: |
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Unfortunately it is quite hard to spot what could have gone wrong in your files. So far everything looks ok, I suspected that the focus of the table could have influenced the behavior so, I wrote a simple example where I emulate your widgets allocation, but I am not able to reproduce the issue. I added few extra cleanup steps (i.e. I ensure the previous terminal closed before spawning another one) Screen.Recording.2025-10-31.at.10.21.41.002.movHave a look: import sys, os
from dataclasses import dataclass
from typing import Optional
import TermTk as ttk
class TestForm(ttk.TTkGridLayout):
def __init__(self):
super().__init__()
splitter = ttk.TTkSplitter()
model = ttk.TTkTableModelList(data=[[f"{_c},{_r}" for _c in range(10)] for _r in range(10)])
self._table = table = ttk.TTkTable(tableModel=model)
self._tree = tree = ttk.TTkTree()
tree.setHeaderLabels(["Column 1", "Column 2", "Column 3"])
splitter.addWidget(table)
splitter.addWidget(tree)
self.addWidget(splitter)
table.cellClicked.connect(self._populateTree)
@ttk.pyTTkSlot(int,int)
def _populateTree(self, row:int, col:int) -> None:
data = self._table.model().data(row=row, col=col)
l0 = ttk.TTkTreeWidgetItem([f"{data}", f"{data}", f"{data}"])
l1 = ttk.TTkTreeWidgetItem(["String A", "String B", "String C"])
l2 = ttk.TTkTreeWidgetItem(["String AA", "String BB", "String CC"])
l3 = ttk.TTkTreeWidgetItem(["String AAA", "String BBB", "String CCC"])
l4 = ttk.TTkTreeWidgetItem(["String AAAA", "String BBBB", "String CCCC"])
l5 = ttk.TTkTreeWidgetItem(["String AAAAA", "String BBBBB", "String CCCCC"])
self._tree.clear()
self._tree.addTopLevelItems(items=[l0,l1,l2,l3,l4,l5])
root = ttk.TTk()
btn_term = ttk.TTkButton(parent=root, pos=( 0,0), text='Term', border=True)
btn_form = ttk.TTkButton(parent=root, pos=( 8,0), text='Table/Tree', border=True)
ttk.TTkButton(parent=root, pos=(32,0), text='Quit', border=True).clicked.connect(ttk.TTkHelper.quit)
winLog=ttk.TTkWindow(parent=root, pos=(0,3), size=(100,30), border=True, layout=ttk.TTkGridLayout())
ttk.TTkLogViewer(parent=winLog)
win=ttk.TTkWindow(parent=root, pos=(5,6), size=(100,30), border=True, layout=ttk.TTkGridLayout())
app=ttk.TTkAppTemplate(parent=win)
app.setWidget(widget=ttk.TTkTestWidgetSizes(), position=app.LEFT, size=30)
app.setWidget(widget=ttk.TTkTestWidgetSizes(), position=app.MAIN)
menu_bar = ttk.TTkMenuBarLayout()
app.setMenuBar(menu_bar, app.LEFT)
menu = menu_bar.addMenu('Menu')
menu_term = menu.addMenu("Term")
menu_form = menu.addMenu("Form")
@dataclass
class _TermState():
term:Optional[ttk.TTkTerminal] = None
def close_term(self) -> None:
if self.term:
self.term.close()
self.term = None
termState = _TermState()
@ttk.pyTTkSlot()
def _set_terminal() -> None:
termState.close_term()
termState.term = term = ttk.TTkTerminal()
app.setWidget(widget=term, position=app.MAIN)
th = ttk.TTkTerminalHelper(term=term)
th.runShell()
@ttk.pyTTkSlot()
def _set_form() -> None:
termState.close_term()
new_form = TestForm()
app.setItem(item=new_form, position=app.MAIN)
btn_form.clicked.connect(_set_form)
btn_term.clicked.connect(_set_terminal)
menu_form.menuButtonClicked.connect(_set_form)
menu_term.menuButtonClicked.connect(_set_terminal)
root.mainloop() |
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I think that the issue is related to the way you populate the tree, I think you copied some code from the ttkDesigner and probably you are overriding some core routines by mistake. |
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I'll try your suggestion, but I don't believe the issue is the tree because I tryed to remove it and left the table only without success. If I don't find a solution, I'll restart from your example. |
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if you are using vscode you can try to use the python debugger. |
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alternatively, if you can create a testing app, using fake data and wrapper where possible, that I would be able to run, and that can reproduce the issue, I can try to check it. |
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I 'll try to follow your advices. |
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I would like to use the TTkAppTemplate to make my application. I would like to load in the main panel many kind of widget depending on the menu voice selected. For example one time I want to have a terminal, another time I would load a table splitted with a property editor made with tree and so on. I tried to do it, but if I load the table with property editor i I don't touch anything it can be changed in a terminal, but if I touch a scroll bar, select something in the table, I can't change it. I don't see any changes. Log is enabled but I don't see any error. I tried the removeItem/removeWidget too without success. Which is the right way to load different widget in MAIN panel?
If it can help I could make a video of the issue.
Thank you!
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