Using Python 2.7 and PyQt4.
So I need a way to make a text of the QPushButton editable when click on it, like on QTextEdit.
There is no builtin way to edit a push button in the sense that you have a cursor and can type along.
Probably the easiest solution is to bring up a QInputDialog. If that feels to heavy, you could also place a floating QLineEdit over or next to the QPushButton. Close that on <Enter> and set the typed text to the QPushButton.
If you really want an editable Button, you'll have to subclass QPushButton and implement the desired functionality yourself. To get started with this, you need to reimplement mousePressEvent() for starting your editing mode. Reimplement keyPressEvent() for handling key strokes. If you need to display a cursor, reimplement paintEvent(). I have no particular resource at hand that describes what exactly you have to do, but the terms above should be sufficient to look it up yourself.
Related
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.
So i'm programming python program that uses wxPython for UI, with wx.TreeCtrl widget for selecting pictures(.png) on selected directory. I would like to add hover on treectrl item that works like tooltip, but instead of text it shows bitmap picture.
Is there something that already allows this, or would i have to create something with wxWidgets?
I am not too familiar with wxWidgets, so if i have to create something like that how hard would it be, lot of code is already using the treectrl, so it needs to be able to work same way.
So how would i have to go about doing this? And if there might be something i might be missing id be happy to know.
Take a look at the wx.lib.agw.supertooltip module. It should help you to create a tooltip-like window that displays custom rich content.
As for triggering the display of the tooltip, you can catch mouse events for the tree widget (be sure to call Skip so the tree widget can see the events too) and reset a timer each time the mouse moves. If the timer expires because the mouse hasn't been moved in that long then you can use tree.HitTest to find the item that the cursor is on and then show the appropriate image for that item.
In PyQt4, I want to present a QPushButton that looks like the down-arrow button in QComboBox. Feasible, and if so, how?
I don't need help getting my new widget-combination acting like a QComboBox (see below). I only want the QPushButton display/graphic to look like the down-arrow button in a QComboBox - and tips/code on how to overlay that graphic (especially if said graphic comes via a file) onto my own QPushButton.
More details, context:
I'm seeking to replace a QComboBox widget with a QLineEdit + QCalendarWidget, because QDateEdit isn't as customizable as I need (I think...). The thought is to place a QPushButton immediately adjacent (on the right-side) of the QLineEdit to make it things look like regular QComboBox as much as possible. Then said button will .exec_() the QCalendarWidget (which is technically wrapped by a QDialog).
Let me know if this doesn't make sense, and I can provide further or clarified context.
You can try a QToolButton with no text and the arrowType property set to Qt.DownArrow. eg: myqtoolbutton.setArrowType(Qt.DownArrow).
I use PyQt4 and Python 2.7.9.
My program contains a few QLineEdit objects. The problem is that when the program is launched, one of the QLineEdits is being focused automatically, which causes my placeholder text to disappear.
Is there any way to prevent it, or at least don't let it hide the placeholder text?
Another way is
self.this_widget.clearFocus()
after window has been shown. Only in Qt5 placeholder texts are displayed even with focus. So maybe switch to PyQt5.
You can use setFocus to put the focus on a different widget (although, depending on which widget you pick, you might also need to set the focus-policy first):
self.some_other_widget.setFocusPolicy(QtCore.Qt.TabFocus)
self.some_other_widget.setFocus()
Alternatively, if you use Qt Designer to create the GUI, you could edit the tab-order so that the line-edit is not the first in the chain. This can also be done programmatically using QWidget.setTabOrder.
I'm studying the Tkinter Listbox widget and have been unable to find solutions for the following functionality:
How can I create non-selectable horizontal separator items, eg. separators equivalent to the Tkinter Menu widget's .add_separator()? (Using chars like dashes and underscores looks awful).
How can I disable a specific item? I tried using .itemconfig( index, state='disabled' ) without success.
How can I enable keyboard navigation, eg. when a user's keyboard input automatically scrolls one forward to the closest item that begins with the text the user typed? Must I bind(<KeyPress>, ...) and manage this behavior myself?
Would some of the above functionality be easier to implement using a Text widget or the ttk.Treeview widget?
you cannot. The widget doesn't support that.
you can't disable certain items, the widget doesn't support a state attribute. That being said, you can monitor the selection and do the appropriate thing if the user selects something that is disabled, and use the item foreground to denote disabled-ness.
You will need to bind to keypress events and manage the behavior yourself. It's not particularly difficult, just a little tedious.
the text widget might be your best bet, though you'll have to add bindings to mimic the default bindings of the listbox.
Bottom line: Tkinter provides nothing that directly supports what you want to do, but the building blocks are all there. You'll just have to build it yourself.