In my first post on apps in tabs, I wrote this:
There are three parts to these "tabbed" apps:
1. Creating the top-level QWidget;
2. Inserting it into a tab and controlling the tab (e.g., toggling it on
and off);
3. Interacting with the app.
Instead of "Creating the top-level Widget" I could better have written
"Designing the top-level widget". Item 2. is the heart of the tabbed-app
approach, and that's what this post is about.
To make it work, we have to:
1. Find the log frame;
2. Create a new tab;
3. Insert our top-level QWidget into it;
4. Be able to toggle the tab on and off.
Here is how it's done in the demo outline I posted last time. I have
inserted explanatory comment into the code. We start with setting up some
useful constants:
"""A log tab panel for demonstrating plotting techniques."""
log = c.frame.log # Get the log frame
TABNAME = 'Pyplot'
# We will use these constants when we control the tab later
WIDGET_NAME = f'{TABNAME}-widget'
VISIBLE = f'{TABNAME}-visible'
The core of the code is the toggle() function:
# The function to toggle the tab on and off. We use the log's
# contentsDict to hold our own, private variables, since it
# is always going to exist. These private names are very unlikely
# to be duplicated by any other tab.
def toggle(log):
"""Create, show, or hide pyplot tab in Log pane.
ARGUMENT
log -- the log panel object for this outline.
"""
# Check whether there is a VISIBLE key. If so,
# delete the tab and destroy our widget.
if log.contentsDict.get(VISIBLE, False):
log.deleteTab(TABNAME)
log.contentsDict[VISIBLE] = False
w = log.contentsDict[WIDGET_NAME]
w.disconnect_all()
w.deleteLater()
del(log.contentsDict[WIDGET_NAME])
else:
# Create our widget and embed it in a tab
w = PlotWindow()
log.createTab(TABNAME, widget = w, createText = False)
log.selectTab(TABNAME)
log.contentsDict[VISIBLE] = True
log.contentsDict[WIDGET_NAME] = w
# If this is the first call of toggle(), create our widget's code
# This will work for (nearly?) any subclass of QWidget.
# Define the widget's class. It will be instantiated when
# toggle(log) runs.
if not log.contentsDict.get(WIDGET_NAME, None):
<< Main Widget >>
toggle(log)
On Thursday, April 13, 2023 at 9:27:39 AM UTC-4 Thomas Passin wrote:
> I have re-organized the code a bit to make to easier to read. It does the
> same job as before. Also, I have zipped up the outline to make it easier
> to get from the browser.
>
> More to come soon.
>
> On Sunday, April 9, 2023 at 1:14:13 PM UTC-4 Edward K. Ream wrote:
>
>> On Sun, Apr 9, 2023 at 7:32 AM Thomas Passin <tbp1...@gmail.com> wrote:
>>
>>> Remind me what you mean by an "info item". Would this be a GitHub issue
>>> with a "devInfo" or "Info" tag?
>>>
>>
>> Exactly.
>>
>> Edward
>>
>
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