Develop Reference

How to receive QMainWindow mouseClick events in a parentless QWidget?

I have a QMainWindow application that generates multiple QWidget popups. I would like to know how I can destroy the pop up QWidgets if the user clicks on the main QMainWindow. I am not sure how to proceed with the resolution of this problem. I do not want to interfere with any QMainWindow events, I just want to destroy the additional pop up windows by any mouse click outside of the pop up widgets area. Is it possible or recommended via signal slot mechanism or eventFilter? Is it possible without dealing with (x,y) coordinates?
Thanks for the suggestions.

I managed to solve my problem. I implemented a custom label (like this) that contains a mousePressedEvent. On clicking this label a Pop widget is generated. The mousePressEvent is not propagated any further from the label. Then I implemented a mousePressedEvent in the QMainWindow where I check for existence of popup windows. If they exist, I close them all. Note that If I do not stop mouse propagation in the label mousePressEvent, on clicking the label the pop window is generated but it is immediately closed by the QMainWindow mousePressEvent because (most likely) the event is propagating to QMainWindow. At least, that solves my problem.
Thanks

How to add a "remove button" at the right side of the hovering (or each) item of a wx.ComboBox popup

What I want is a mean to remove an item from the combobox without having to add a separate remove button somewhere else. So I want a remove button to appear at the right side on a combobox dropdown item when I hover over my mouse pointer on it. And, it is also OK if all the items have remove button at the right side and do not need hovering.
The images bellow will illustrate what I am saying [...please ignore my mspaint skils]
[combobox with remove button for hovering item]
https://i.imgur.com/kIMtF3G.jpg
[combobox with remove button for each item]
https://i.imgur.com/iyG23vG.jpg
[NOTE: Sorry, I cannot post images directly because it needs at least 10 reputation to post images.]
[I am new to python and wxpython. So please ignore my ignorance if any. And for the same reason any simple code sample will be greatly helpful.]
Regards.

The wx.ComboBox does not have this feature. The wxPython GUI toolkit uses the target platform's native widgets. If those widgets don't support doing it, then neither does wxPython.
However, wxPython does have custom widgets or you could create your own widget to do this sort of thing.
I also think you could use a context-menu for this task. You would need to right-click to make it work. Another method would be to bind to a mouse event and try to figure out where in the widget you are, but I think that method would be error prone.

Popup Dialog in Tkinter/Python

I need to add a popup dialog box on my GUI.
So, when ever I hover my mouse over a label, it should be able to show a popup( Like the type we get while hovering over a file in windows).
It should also disappear as soon i move away the mouse.
To start with, I am not even sure which module or class to use. I tried menu, but the results are not what i expected.
I also tried to learn tkCommonDialog, but couldn't understand it properly.
Please Advice!

The little popup window is called a tooltip.

This post may be relevant: http://bytes.com/topic/python/answers/505848-tkinter-button-overrelief

Take a look at the Balloon widget in the Tix package. I think it is just what you are looking for.

Qt Designer: how to add custom slot and code to a button

I use Qt4 Designer and I want that when I click on the "yes" button, some code will execute. And when I click on the "no", some other code will be execute. How can I do it?

Click on the Edit Signal/Slots tool.
Create a connection for your button. For this, select your button in the designer by pressing on it with the left button of the mouse. Move the mouse to some place in the main window to create a connection with the main window (it is like a red line with a earth connection).
When you release the mouse button, the Configure Connection dialog appears.
In this dialog select a signal in the left text control (the sender), for example, pressed().
Then press edit in the right text control (the receiver). A dialog for the Signals/Slots of MainWindow appears.
In the slot panel add a new slot (green cross). The text slot1() appears. Double click on it to edit the line and write instead the name of your function doit_when_yes_ispressed(). Accept.
Now in the Configure Connection dialog you will see your function in the right text control. Select and Accept.
In the designer now you can see the signal and your function in the widget.

Right-click on your widget
Select "Go to slot..."
Select a signal and click OK
Your custom slot declaration and definition for that signal will be added to *.cpp and *.h files. Its name will be generated automatically.
upd:
Sorry, I didn't notice that the question is about Python & QtDesigner itself, I was thinking of the designer mode in QtCreator IDE. However, this still may be useful for someone who is looking for Qt/C++ info, so I leave the answer.

wxPython: prevent taskbar menu from closing after clicking an item

I am using wxPython to create a taskbar menu. The menu contains some menu items (obviously).
Now I would like to update/change some of these items when a particular item is clicked, while still displaying the menu.
How can I prevent the taskbar menu from disappearing after clicking an item?
The only method I've found that could be useful is wxMenu.UpdateUI(), but that doesn't prevent the menu from disappearing.

Although I never got around to trying it myself, I remember attempting a similar effect with a popup menu & textctrl. You might want to consider trying wx.lib.agw.flatmenu.FlatMenuBar, it provides an event handler OnMenuDismissed(self, event), as well as a few others, which by name appear to be what you need. You would need to create your own OnMenuDismissed() and override the event.