Pyqt window flags

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Pyqt window flags

A window flag is either a type or a hint. A type is used to specify various window-system properties for the widget. A widget can only have one type, and the default is Qt::Widget. However, a widget can have zero or more hints. The hints are used to customize the appearance of top-level windows. We will start by reviewing the ControllerWindow class, then we will take a look at the PreviewWindow class. The ControllerWindow class inherits QWidget. The widget allows the user to choose among the available window flags, and displays the effect on a separate preview window.

We declare a private updatePreview slot to refresh the preview window whenever the user changes the window flags. We also declare several private functions to simplify the constructor: We call the createTypeGroupBox function to create a radio button for each available window type, using the private createButton function, and gather them within a group box.

In a similar way we use the createHintsGroupBox function to create a check box for each available hint, using the private createCheckBox function. In addition to the various radio buttons and checkboxes, we need an associated PreviewWindow to show the effect of the currently chosen window flags.

In the constructor we first create the preview window. Then we create the group boxes containing the available window flags using the private createTypeGroupBox and createHintsGroupBox functions. In addition we create a Quit button. We put the button and a stretchable space in a separate layout to make the button appear in the WindowFlag widget's right bottom corner.

Finally, we add the button's layout and the two goup boxes to a QVBoxLayoutset the window title and refresh the preview window using the updatePreview slot. The updatePreview slot is called whenever the user changes any of the window flags. First we create an empty Qt::WindowFlags flagsthen we determine which one of the types that is checked and add it to flags.

We also determine which of the hints that are checked, and add them to flags using an OR operator. We use flags to set the window flags for the preview window. We adjust the position of the preview window. The reason we do that, is that playing around with the window's frame may on some platforms cause the window's position to be changed behind our back. If a window is located in the upper left corner of the screen, parts of the window may not be visible.

So we adjust the widget's position to make sure that, if this happens, the window is moved within the screen's boundaries. Finally, we call QWidget::show to make sure the preview window is visible. First we create a group box, and then we create a radio button using the private createRadioButton function for each of the available types among the window flags. We make Qt::Window the initially applied type.A dialog window is a top-level window mostly used for short-term tasks and brief communications with the user.

QDialogs may be modal or modeless. QDialogs can provide a return valueand they can have default buttons. Note that QDialog and any other widget that has type Qt. Dialog uses the parent widget slightly differently from other classes in Qt. A dialog is always a top-level widget, but if it has a parent, its default location is centered on top of the parent's top-level widget if it is not top-level itself.

It will also share the parent's taskbar entry. Use the overload of the QWidget. This function allows you to explicitly set the window flags of the reparented widget; using the overloaded function will clear the window flags specifying the window-system properties for the widget in particular it will reset the Qt. Dialog flag.

pyqt window flags

A modal dialog is a dialog that blocks input to other visible windows in the same application. Dialogs that are used to request a file name from the user or that are used to set application preferences are usually modal. Dialogs can be application modal the default or window modal. When an application modal dialog is opened, the user must finish interacting with the dialog and close it before they can access any other window in the application.

Window modal dialogs only block access to the window associated with the dialog, allowing the user to continue to use other windows in an application.

Typically, to get the dialog to close and return the appropriate value, we connect a default button, e. OKto the accept slot and a Cancel button to the reject slot. Alternatively you can call the done slot with Accepted or Rejected. An alternative is to call setModal true or setWindowModalitythen show. Calling setModal true is especially useful for progress dialogs, where the user must have the ability to interact with the dialog, e.

If you use show and setModal true together to perform a long operation, you must call QApplication. See QProgressDialog. A modeless dialog is a dialog that operates independently of other windows in the same application. Find and replace dialogs in word-processors are often modeless to allow the user to interact with both the application's main window and with the dialog.

Modeless dialogs are displayed using showwhich returns control to the caller immediately.A window flag is either a type or a hint. A type is used to specify various window-system properties for the widget.

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A widget can only have one type, and the default is Qt::Widget. However, a widget can have zero or more hints.

The hints are used to customize the appearance of top-level windows.

pyqt5 window flags

The example consists of two classes:. We will start by reviewing the ControllerWindow class, then we will take a look at the PreviewWindow class. The ControllerWindow class inherits QWidget. The widget allows the user to choose among the available window flags, and displays the effect on a separate preview window.

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We declare a private updatePreview slot to refresh the preview window whenever the user changes the window flags.

We also declare several private functions to simplify the constructor: We call the createTypeGroupBox function to create a radio button for each available window type, using the private createButton function, and gather them within a group box. In a similar way we use the createHintsGroupBox function to create a check box for each available hint, using the private createCheckBox function.

In addition to the various radio buttons and checkboxes, we need an associated PreviewWindow to show the effect of the currently chosen window flags. Then we create the group boxes containing the available window flags using the private createTypeGroupBox and createHintsGroupBox functions.

In addition we create a Quit button. We put the button and a stretchable space in a separate layout to make the button appear in the WindowFlag widget's right bottom corner. Finally, we add the button's layout and the two goup boxes to a QVBoxLayoutset the window title and refresh the preview window using the updatePreview slot. The updatePreview slot is called whenever the user changes any of the window flags. First we create an empty Qt::WindowFlags flagsthen we determine which one of the types that is checked and add it to flags.

We also determine which of the hints that are checked, and add them to flags using an OR operator. We use flags to set the window flags for the preview window. We adjust the position of the preview window.PyQt5 can be used to create desktop applications in Python. It lets you build a graphical user interface GUI for your Python program. In a desktop, not all windows are the same. Some windows can not be maximized like a popup. Some windows only exist in full screen mode games.

A PyQt window can be configured using window flags. All kind of windows are possible on a desktop operating system. If you use the Chrome web browser, you may see a different type of title bar, custom from other desktop apps on your computer. You would set a windows flags using this method: window.

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Download PyQt Examples. Learn Python. FramelessWindowHint Qt. WindowTitleHint Qt. WindowSystemMenuHint Qt. WindowMinimizeButtonHint Qt. WindowMaximizeButtonHint Qt. WindowCloseButtonHint Qt. WindowShadeButtonHint Qt. CustomizeWindowHint Windows These can be applied to windows. PyQt has not just one, but many types of windows: Qt.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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PyQt: How To Pass Data To Other Window

I use python 3. I like the idea of making guis by designer and importing them in python with setupUi. I'm able to show MainWindows and QDialogs. However, now I would like to set my MainWindow, always on top and with the close button only. I know this can be done by setting Windows flags. I tried to do as following:. The MainWindow shows up without error but Flags are not applied. I suppose this is because I asked to change Windows properties after it was already created.

It is possible to change flags in Qt designer? Every call of setWindowFlags will completely override the current settings, so you need to set all the flags at once. Also, you must include the CustomizeWindowHint flag, otherwise all the other hints will be ignored.

The following will probably work on Windows:. However, it is highly unlikely this will work on all platforms. Window managers are completely free to ignore these flags and there's no guarantee they will all behave in the same way. Learn more. Asked 3 years, 4 months ago. Active 4 months ago.

Viewed 9k times.For instance, it draws the windows it manages on itself and arranges them in a cascading or tile pattern. The following code adds an area to a main window:. Unlike the window managers for top-level windows, all window flags Qt. WindowFlags are supported by QMdiArea as long as the flags are supported by the current widget style. If a specific flag is not supported by the style e.

It is common to pass a QWidgetwhich is set as the internal widget, to this function, but it is also possible to pass a QMdiSubWindow directly. The class inherits QWidgetand you can use the same API as with a normal top-level window when programming.

pyqt window flags

See the QMdiSubWindow class description for more details. A subwindow becomes active when it gets the keyboard focus, or when setFocus is called. The user activates a window by moving focus in the usual ways.

The MDI area emits the subWindowActivated signal when the active window changes, and the activeSubWindow function returns the active subwindow.

The convenience function subWindowList returns a list of all subwindows. This information could be used in a popup menu containing a list of windows, for example. The subwindows are sorted by the current WindowOrder. Also, it is used when cascading or tiling the windows with cascadeSubWindows and tileSubWindows.

Both are slots and are easily connected to menu entries. This enum describes options that customize the behavior of the QMdiArea.

pyqt window flags

It stores an OR combination of AreaOption values. Specifies the criteria to use for ordering the list of child windows returned by subWindowList.

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The functions cascadeSubWindows and tileSubWindows follow this order when arranging the windows. Constructs an empty mdi area. Gives the keyboard focus to another window in the list of child windows. The window activated will be the next one determined by the current activation order. The window activated will be the previous one determined by the current activation order. Returns a pointer to the current active subwindow.The QWindow class represents a window in the underlying windowing system.

Windows can potentially use a lot of memory. A usual measurement is width times height times color depth. A window might also include multiple buffers to support double and triple buffering, as well as depth and stencil buffers.

To release a window's memory resources, call the destroy function. QWindow has reportContentOrientationChange that can be used to specify the layout of the window contents in relation to the screen. The content orientation is simply a hint to the windowing system about which orientation the window contents are in.

It's useful when you wish to keep the same window size, but rotate the contents instead, especially when doing rotation animations between different orientations. The windowing system might use this value to determine the layout of system popups or dialogs. By default, the window is not visible, and you must call setVisible trueor show or similar to make it visible.

To make a window hidden again, call setVisible false or hide. The visible property describes the state the application wants the window to be in. Depending on the underlying system, a visible window might still not be shown on the screen. It could, for instance, be covered by other opaque windows or moved outside the physical area of the screen.

On windowing systems that have exposure notifications, the isExposed accessor describes whether the window should be treated as directly visible on screen.

The exposeEvent function is called whenever an area of the window is invalidated, for example due to the exposure in the windowing system changing. On windowing systems that do not make this information visible to the application, isExposed will simply return the same value as isVisible.

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QWindow::Visibility queried through visibility is a convenience API combining the functions of visible and windowStates. The application can start rendering as soon as isExposed returns trueand can keep rendering until it isExposed returns false. To find out when isExposed changes, reimplement exposeEvent.


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