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Thread Rating: 2 Vote s - 1. Thread Modes. After a selcetion of users and the ouput format, I will open a Filedialog to chouse the Filename and the path.
Options, QFileDialog. It looke to me without being able to run code as though createReportDialog returns nothing which means it automatically returns None.
Is None a valid type for ui. Test everything in a Python shell iPython, Azure Notebooketc. Someone gave you an advice you liked? Test it - maybe the advice was actually bad. Someone gave you an advice you think is bad? Test it before arguing - maybe it was good.
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PyQt5 Tutorial: A Window Application with File IO
Dialogs are useful GUI components that allow you to communicate with the user hence the name dialog. They are small modal or blocking windows that sit in front of the main application until they are dismissed.
Qt actually provides a number of 'special' dialogs for the most common use-cases, allowing you to take advantage of desktop-specific tools for a better user experience. In Qt dialog boxes are handled by the QDialog class. To create a new dialog box simply create a new object of QDialog type or a subclasspassing in a parent widget, e. QMainWindow as its parent. Let's create our own QDialogwe'll use our menu example code so we can start a dialog window when a button on the toolbar is pressed.
In the triggered function that receives the signal from the button we create the dialog instance, passing our QMainWindow instance as a parent.
This will make the dialog a modal window of QMainWindow. This means the dialog will completely block interaction with the parent window. Once we have created the dialog, we start it using. Remember that there can be only one Qt event loop running at any time!
Don't start a dialog and expect anything else to happen anywhere else in your application. You can exit by clicking the [x]. Like our very first window, this isn't very interesting. Let's fix that by adding a dialog title and a set of OK and Cancel buttons to allow the user to accept or reject the modal.
To customise the QDialog we can subclass it — again you can customise the dialog without subclassing, but it's nicer if you do. In the above code, we first create our subclass of QDialog which we've called CustomDialog. First we set a title for the QDialog using. The next block of code is concerned with creating and displaying the dialog buttons. This is probably a bit more involved than you were expecting.
However, this is due to Qt's flexibility in handling dialog button positioning on different platforms. Breaking these expectations can be incredibly annoying to your users, so I wouldn't recommend it. The first step in creating a dialog button box is to define the buttons want to show, using namespace attributes from QDialogButtonBox. Constructing a line of multiple buttons is as simple as OR-ing them together using a pipe.
The full list of buttons available is below:. These should be sufficient to create any dialog box you can think of. For example, to show an OK and a Cancel button we used:. The variable buttons now contains a bit mask flag representing those two buttons. Next, we must create the QDialogButtonBox instance to hold the buttons.
The flag for the buttons to display is passed in as the first parameter. To make the buttons have any effect, you must connect the correct QDialogButtonBox signals to the slots on the dialog.
Create a File Menu in Python PyQt
In our case we've connected the. Lastly, to make the QDialogButtonBox appear in our dialog box we must add it to the dialog layout. So, as for the main window we create a layout, and add our QDialogButtonBox to it QDialogButtonBox is a widgetand then set that layout on our dialog.First, we need to consider where to put this.
We could put this in the home method, but it seems to make the most sense to put it in the init method, since the menu-bar is likely to stay the same, no matter where you go in the application, or at least mostly the same.Open Files Dialog Box - Python Tkinter GUI Tutorial #15
Depending on where you go in the application, you can modify the menu-bar, but I think this would be easier than re-defining the menu bar at every stage for each window.
Adding menu bars, and tool bars, is usually the same-ish process across GUI development kits in Python:.
Dialogs in PyQt5
First, you define item within the menu, and what it will look like. Then you define what you want that item to do. Then, you create the actual menu that you want it to sit on, then you put it all together. Let's show that in the code:. The status tip is something that is built into QT, but we do still need to call it into being to see anything. Luckily, this is super easy:. The next tutorial: PyQT Toolbar.
It only takes a minute to sign up. I'm making a plugin which has two windows. What I want to know is how to refer pushButton in one window to method which opens new window.
Is there anything else I should take into consideration? EDIT: I tried to do it like dmh said, but something is still wrong. Here is my code I what had I changed:. Of course you can do it on a different way. And remember about passing objects like parent it is your main dialog window and iface if you want to use them with this new window.
I was thinking about difficoult soulution and I just overwrote it all. It was so simple. I must just import dialog for second window, add a method to open new dialog and add a line in init to react when button pushed. Sign up to join this community. The best answers are voted up and rise to the top.
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When buton clicked, open new window - pyqgis Ask Question. Asked 3 years, 9 months ago. Active 1 year, 11 months ago. Viewed 26k times. Maybe someone have a code with similar button-window connection? After setupUI you can access any designer object by doing self. Tom W. Tom 1 1 gold badge 8 8 silver badges 16 16 bronze badges.
It only takes a minute to sign up. So: I click on a button, which triggers a QFileDialog interface.
Quite ofter but not always, and I could not define the conditionsthe QFileDialog will re-open itself after clicking on "OK" or "Cancel". It requires me to cancel several times to stop the QFileDialog re-opening. I suppose that the click event is thrown several times, is it correct? How can I solve this behavior? My problem came from the fact that I was calling self. I moved the initialisation of the connections the call to self. Sign up to join this community.
The best answers are voted up and rise to the top.
Home Questions Tags Users Unanswered. Asked 4 years, 4 months ago. Active 2 years, 2 months ago. Viewed 2k times. Bruno von Paris Bruno von Paris 7 7 silver badges 20 20 bronze badges. Active Oldest Votes. Maybe try to use getOpenFileName without these parameters. I just tried it, and I still have the problem. Sign up or log in Sign up using Google. Sign up using Facebook.
Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog.Thiebaut talk31 July EDT. The application uses a dialog to browse for a file, opens it, displays it contents in a text-edit widget, allows the user to edit the contents in the same text edit, and finally gives the user the option of saving the file to a new copy with a ".
We use PyInstaller to create an app that is self-contained and can be distributed to others for execution. We can now test our Python script. Use the Python interpreter for which you have installed PyQt5 in our case Python 3. The idea behind the Model-View-Controller paradigm is that the graphical user interface UI should be separate from the logic of the application, with very well defined links between the two.
This makes it much easier to modify the logic of the model without having to change any code relating to the UI. Similarly, editing code relating to how the UI operates in response to user input should not influence the code controlling the logic of the model. We are going to subclass the mainwindow. The reason we will do this is simple. Any additions you would have made to mainwindow. We will call our new script MyApp. A File-Browsing dialog is added, as well as a Warning dialog if the file specified in the Line-Edit is invalid.
A member variable is added to hold a reference to the model, which is implemented by the class Model, in model. From dftwiki. Jump to: navigationsearch. All changes made in this file will be lost! QApplication sys. The code at the end of the mainwindow. We have simply copied the code from mainwindow. Thiebaut This is the model part of the Model-View-Controller The class holds the name of a text file and its contents. Both the name and the contents can be modified in the GUI and updated through methods of this model.
Returns False otherwise. Otherwise resets both the filename and file contents members. Provides functionality to the 3 interactive widgets 2 push-buttons, and 1 line-edit. The class maintains a reference to the model that implements the logic of the app. The model is defined in class Model, in model. Typically some interaction takes place, the UI responds, and informs the model of the change.
Then this method is called, pulling from the model information that is updated in the GUI. QMessageBox m. Warning m. Ok QtWidgets. Cancel m. Navigation menu Personal tools Log in. Namespaces Page Discussion.
With this code, I can display the HomePage, which has 2 buttons. This is where the problem comes, I do not know how do I display the other 2 Dialogs. Any help will be appreciated. Learn more. Asked 1 year, 11 months ago. Active 1 year, 11 months ago. Viewed 5k times. QtCore import pyqtSlot from PyQt5.
Renegade Renegade 25 1 1 silver badge 7 7 bronze badges. Active Oldest Votes. It's simple, in the slots you have to create the objects and show them Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.
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