Qwidget move with mouse. :
I have a class QMovableResizableWidget.
Qwidget move with mouse I can do something when mouse is moving by overwriting QWidget's mouseMoveEvent function. But if i move and resize the QWidget manually with the mouse, i can resize it to 1920x2160. Move(dragg) a QLabel inside a QFrame. How to capture mousePressEvent between widgets in a layout? 0. 61 5 5 how to convert mouse move event into mouse scroll/drag event. But it needs to be a widget with buttons and sliders and stuff like that. When the button is toggled on, the mouse should be tracked and its X & Y coordinates along with whether tracking is enabled or not should be shown in label_5. There seem to various methods to do that. setVerticalScrollMode(QtWidgets. Here's what I have: import sys from PyQt5. I've been trying to get QMovableResizableWidget(). Ex. 5px). ScrollPerPixel) which works nicely but requires user to move mouse to the scroll bar and use it to experience the smooth scroll but the mouse wheel works the old way with jumpy scrolling, i wonder if there a way to make the scrolling behave the same when using the mouse wheel ? After some trying and experiments I obtained a solution, that might be a good starting point. finalVbox) self. See also QWidget::move() and QWidget::setGeometry(). Thanks. Mouse move events will occur only when a mouse button is pressed down, unless mouse tracking has been enabled with setMouseTracking(). 0. I then have I'm using QTCreator and I created a QWidget, then I have hidden the title bar with setWindowFlags(Qt::CustomizeWindowHint);. This is mostly because in some environments, moving the mouse over a different window may focus that other window, but keyboard events are still sent to the QLineEdit field (even though its parent window isn't focused anymore), which is confusing. That means, if you know the size of the widget (use for example QWidget::rect()), you can compute within the Cheers this works really well, there were some errors that were flagged when i tried to compile it QMouseEvent* mouse_event = static_cast<QMouseEvent*>(event); i had to change to QMouseEvent* mouse_event = (QMouseEvent *) event; apart from that all working thank you. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Mouse move events will occur only when a mouse button is pressed down, unless mouse tracking has been enabled with QWidget::setMouseTracking(). For press and release events, the position is usually the same as the position of the last mouse move event, but it might be different if the user’s hand shakes. 12. It seems that move events are receieved by the QDialog but not further propagated to child widgets. For example it will be a button in future. Just use it as-is, and set the item's QGraphicsItem::ItemIsMovable flag. Where the mouse is on the same position (first square on top left) but after I convert it to the coordinates it shows a different one. the user pressed the mouse on the button with the intent of clicking it and 2. QtGui. In other cases your widget regains focus and your widget still have a grab on mouse. – This is only a suggestion, but void QWidget::mouseMoveEvent(QMouseEvent *event) says: If mouse tracking is switched off, mouse move events only occur if a mouse button is pressed while the mouse is being moved. I want to move a tablewidget which is added inside a layout. QWidget *parent = nullptr is the parent of the new widget. The series of QPushButton widgets in a horizontal layout. I try to do this using following code class MainWindow : public QMainWindow { Q_OBJECT public: explicit MainWindow(QWidget *parent = 0); ~MainWi Mouse events don't occur for each pixel as the mouse moves, on most operating systems. EDIT: I have made a custom channel box for Maya like above. On a QGraphicsView I set a QGraphicsScene. I have a qwidget derived control. Drag a rectangle over image in Qt. The most efficient approach depends on what widget will be providing the coordinates, but in most cases the simplest way will be to setMouseTracking(true) for the widget, and override it's I cannot to handle double click event. I'm on windows 11 – sil ora. My current problem is determining whether or not the mouse is above the target widget on mouse up. How to receive Enter and Leave Events on a QWidget. I've just started doing Qt designing using python 3. While dragging, the widget should not be moved it should only capture the mouse coordinates while the mouse is pressed. I am new in QT and I am trying to do something really basic, which consists in a graphic view object where I want to know the mouse position. As you already mentioned you have to break the recursive calls of mouseMoveEvent. If the widget is a window, the position is that of the widget on the desktop, including its frame. I broke the recursive call with a simple boolean variable, but maybe also QSignalBlocker can be helpful here, even though it blocks all signals. Here we're creating a window, but the Window widget is subclassed from QWidget, meaning you can add this widget Now I have tried to add an almost transparent Qwidget item under it so I can pick up mouse events with these nearly transparent pixels: On windows I get the described behaviour: flickering window when the mouse moves over the window. do you mind explaining what some of the hard coded values are for though so i can But then, suddenly you are crating new window which steals the focus and your widget doesn't receive the mouse release event so it doesn't release the mouse grab. At that point, Qt would internally invoke QWidgetPrivate::createWinId(), which would create a Cocoa window for the QWidget, even though it was just a plain widget. I am trying to get my mouse position on a Widget when clicked. I read this but my problem is different. Reimplement the QWidget event handlers, mousePressEvent(), mouseReleaseEvent(), mouseDoubleClickEvent(), and mouseMoveEvent() to receive mouse events in your own widgets. This works as expected when the mouse movement occurs within the main QDialog. Google the classes and methods This makes it possible to render push buttons and comboboxes differently when the mouse pointer is over them. If you use a widget you will see that only mouseMoveEvent is called if the mouse presses the widget, when activating the flag mouseTracking you enable that it is only necessary that the cursor be over the widget (it is not necessary to press the widget, it would be enough with a hover event ), and I think the OP QWidget how to detect mouse stop moving. Qt automatically grabs the mouse when a mouse button is pressed inside a widget; the widget I would create some DummyWidget, which would have a 400x400 dimensions and custom virtual mouseMoveEvent method, which would actually handle the mouse movement. Add super() calls to each mouse event handlers (super(). Thanks in advance. I need to grab the mouse position as it hovers over my label without clicking so, self. # include <QtWidgets A QWidget has no clicked signal. So far I have managed to detect mouse scroll events, but I cannot detect a mouse hover events so I could determine a mouse position to zoom to. – does anyone know how I can implement the dragMove event on my QWidget? So basically what I want is to move my mouse over the Widget hold down my mouse button and drag it. QtWidgets import (QWidget, QToolTip, My question is basically the same as this one, but applied to the Qt C++ framework. For handling the mouse click events on the circular widget I would use signal/slot mechanism here. 7 shares this widespread problem. I have 2 GroupBoxes and I would like to get the current mouse position local to each GroupBox and globally . Hi, I insert this QWidget in main. (See also the Drag and Drop guide. All widgets support events, so there's some manual work to do, but not much: Override the event function for your widget (which you derive from QWidget; Respond to events of type QEvent:: MouseButtonPress; Alternatively, add a eventFilter method. For mouse move events, we use QMouseEvent::buttons() to find which buttons are currently held down (as When I click on a QLabel, I can use the mousePressEvent in QWidget. 2025-01-13. Set the Widget Attribute for WA_Hover // in your widget's constructor (probably) this->setAttribute(Qt::WA_HOVER, true); Implement QWidget::enterEvent() and On mouse move event you just move your widget in its parent coordinate system. However I have hit a hard road and I can not seem to be able to sort myself out. In order to move (changing the position) any widget like buttons or label move() method is used in PyQt5 application. When overriding a mouse event, you should handle all of them (move, press and release events). It is working fine but as soon as I press the mouse button on it (for example to draw freehand line), the cursor changes back to application cursor. You can then set a boolean in the press event to know whether or not the mouse button is held down when entering the mouseMove event. py file. This function is part of the Qt library, which is a collection of cross-platform C++ libraries for building graphical user interfaces. Is it possible to receive moveEvent() for top-level widget in the middle of moving, when mouse button is pressed and not released yet? I see that in: While QWidget::move() is a common method for repositioning widgets, there are other approaches that might be more suitable in certain scenarios:. ; widget. Getting a Qt Widget to update a mouse event inside a Qt form made with Qt Designer. Qt calls capturemouse when button is pressed. #ifndef CUSTOMWIDGET_H #define CUSTOMWIDGET_H #include <QWidget> class To catch a mouse movement event in Qt, you need to override MouseMoveEvent, but MouseMoveEvent is not too resource-intensive. To properly center it you need to take under consideration the fact that label has width and height i. The function pos() gives the current cursor position, while oldPos() gives the old return 0 instead of 1 when I'm holding down the left mouse button while moving the cursor around in a graphicscene. The idea behind this is to take an action if a certain key is pressed and the mouse is over a certain widget. QtWidgets import QWidget, QLabel, QPushButton, QHBoxLayout from PySide6. The actual goal is to make such an (open) completer disappear when the mouse leaves the window. Create a custom event filter class that inherits from QObject. That way you can adjust the shape that they're drawing as they draw it. From the @Leonid Bor, the QDrag object gives you a way to have an icon under your mouse pointer. In these event handlers you can recalculate the new position for your widget and then move it. But when I run it on embedded platform and move the cursor away from the QDialog widget (e. mousepress(300, 400)). I want to handle mouse press event on vlc frame. Qt automatically grabs the mouse when a mouse button is Detailed Description#. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company QWidget::move(0,0) & QWidget::resize(1920,2160) -> The QWidget does not exceed the size of the 1 monitor. It sub-classes another class QResizableWidget, which is a subclass of QCustomWidget, a subclass of QWidget. Purpose. Improve this answer. (With mouse tracking disabled, which is the default, mouseMoveEvents are only You should reimplement the move event handler in your parent widget void QWidget::moveEvent ( QMoveEvent * event ) and probably the resize event handler. I add a QDial object through a QGraphicsProxy widget. How to move the whole window when mouse is on the window's custom widget in Qt? 0. I'd like, when I move with mouse the windows application, that mw2 moving automatically (and take it beside mainForm); now when I move windows app, the position of mw2 don't change (it is fixed). By default, widgets I have a QMainWindow that has a QWidget. setMouseTracking(True) mainWidget = QWidget(self) self. The mouseMoveEvent is only called when the mouse is moved whilst the left mouse button is pressed, unless ofcourse the widget has 'mouse tracking'. If that's what you're after, that is. If you move the widget Qt does not have mouse hover, or mouse over (as some people call it) events in its widgets by default but it provides the means to do it quite easily if you just know how to inherit I'm reimplementing the QWidget::mouseMoveEvent() function for a custom widget. There is a QPushButton on the QMainWindow; when the button is clicked, a QDialog with QLineEdit will be show (using exec()). The first solution to come to mind is to move the mouse programmatically to (0, 0) and back by Windows means. To move the window from any widget it is necessary to be able to access the window, and for this we use the method window() that returns the top level, it is not necessary to separate the coordinates x() and y(), the following code implements the solution:. It works when you move the mouse slowly but fast movements will make the cursor leave the area. However, when the mouse moves into a QTabWidget the label updating stops. I have to receive the current mouse cursor coordinates in mm/inch, while the cursor hovers over a QWidget. I want to be able to click to have the slider jump to the position where the mouse clicks. It utilizes grabMouse() to capture mouse movements and updates the cursor position accordingly. When any mouse button is pressed (and holded) outside of the small QWidget, and the mouse is moved on the top of this small QWidget (While holding), QEvent::MouseMove is not Detailed Description. Then I added to Qt gesture This plugin supports grabbing the mouse only for popup windows Copy link Contributor. I would like this window to be moveable and resizeable, I'm currently achieving this by using the mouse events in the following code: void QWidget::wheelEvent(QWheelEvent* event) will be what you are after (docs here). Now when button moves that can be a child of Widget>dockWidget>mainWindow changing position of mainWindow, will move button to new position thus my hover widget has to move as well. I have a QGLWidget that is a plot. Note that I do not want to use setOverrideCursor on mouseenter event for example because I Actually there is an even better option than using the mouse events of the parent widget: You can implement the mouseMoveEvent function of the child widget and get the QMouseEvent::pos() position which is relative to the top left corner of the widget. The QWidget appears, and has its origin set in the mouse down event of the QMainWindow. setFocus() moves the focus as usual, but the new focus widget receives keyboard events only after PySide relative to this widget. 3. Is there anyway to get this to return 1 so I can tell when a user is dragging the mouse across the graphicscene. Simulate mouse click on QSlider I have implemented a sort of gestures listener in the parent widget. The small QWidget show a message every time QEvent::Enter, QEvent::Leave or QEvent::MouseMove is triggered. If mouse tracking is switched off, mouse move events only occur if a mouse button is pressed while the mouse is being moved. In the following example, the left half of the item receives mouse presses because that falls within the area reported by QGraphicsItem::shape(). Already tried: mouseMoveEvent void darstellung::mouseMoveEvent(QMouseEvent *event){ qDeb I'm new to PyQt and I'm trying to use it to create a widget that returns the position of the mouse in real time. Qt automatically grabs the mouse when a mouse button is pressed inside a widget; the widget I am creating a frequency table calculator. Then the mouse will no longer move, thus the y-coordinate of the mouse position will no longer change. For some reason, I can't set these flags and must implement some thing myself which behaves like this. QWidget. setMouseTracking() grabMouse() pos() For mouse move events, this is all buttons that are pressed down. When I'm showing multiple widgets with Qt::Popup flag set, only the first of them can receive mouse enterEvent or leaveEvent. mapToParent and mapFromParent methods translate relative coordinates. cpp and I move it beside myMainForm (). To make this work, use events. The user can use it to move I'm trying to create a window with a custom bar on top. Since I calculate the zoom-delta in the mouse move event out of that very y-coordinate, no further magnification will happen because the y coordinate stays the While QWidget::mouseGrabber() is a powerful tool for controlling mouse input, there are alternative approaches that might be suitable for certain scenarios:. Related. Qt does not have mouse hover, or mouse over (as some people call it) events in its widgets by default but it provides the means to do it quite easily if you just know how to inherit a class and add some protected functions to it. How to move the whole window when mouse is on the window's custom widget in Qt? Hot Network Questions What to do about potential employers requesting academic documents that would reveal my age? QWidget *parent = nullptr is the parent of the new widget. The Realizing this is a very old question, it is the first hit that comes up when you try "Qt detecting the end of a window move event". This is the slider I have. Maybe that is worth looking into? All is fine except one problem. PySide2. 1 (in visual studio, but I tried the same on QT creator 4. Maybe plasma has some extension ? Instead of using Qt::FramelessWindowHint, we'll keep the native title bar. However, it's not cross-platform(ish). If mouse tracking is The docs are your friend! void QWidget::mouseMoveEvent ( QMouseEvent * event) [virtual protected] This event handler, for event event, can be reimplemented in a subclass to receive mouse move events for the widget. I have a QApplication in PyQt5 that tracks the mouse movement and updates a label with x & y coordinates. nativeParentWidget() If mouse tracking is disabled (the default), the widget only receives mouse move events when at least one mouse button is pressed while the mouse is being moved. QAbstractItemView. I've found that mouse tracking is not working for this (in particular because I'm using a third party widget that does not expose the mouse moved signal). When run it on my pc/Linux platform it works well. PyQt4 mouse move event: find widget. Share. Are there any inbuilt methods to do this? Capturing Mouse Events in Qt Widgets: Exploring QWidget::grabMouse() 2025-01-13. : I have a class QMovableResizableWidget. I use setCursor to change its cursor to cross shape. ; Global Event Filtering Use QApplication::installEventFilter() to install a global event filter that can intercept events for The first time each one opens I don't care too much where it is positioned but if the user moves it before closing it then the next time the user opens it I want it to reappear where the user previously left it. It records mouse events and writes them to a file (f. setCentralWidget(mainWidget) mainWidget. ; Install the event filter on the widget you want to Currently, I use the class as below and promote it to graphics view to Zoom in and zoom out image. Qt module: PyQt5 is a set of Python bindings for the Qt application framework. How to call qt mousepressevent explicitly? 2. This answer can partially solve the problem, but only handle the move that triggered by the mouse, because we can also use keyboard to move a QWidget, I want it's child widget also respond to it's movement, how to do that? 1 Reply Last reply . I am trying to build a custom widget which is a menu. Currently, I have an overlay widget that spans the app and has transparent mouse events. Qt: How to filter accidental (consecutive) MouseButtonRelease and MouseButtonPress events? Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company Handles the event that occurs when a mouse button is released within the boundaries of a widget. iamsergio commented Jul 20, 2019. This is in so far reasonable as moving the whole dialog window It turned out at some point after the QWidget (viewport_) was calling QWidget::winId(). Using mouse to move qwidget without exceeding parent size. I managed to do that, but the rectangle is drawn when the mouse left key is released. 1. I. QWidget how to detect mouse stop moving. but don't add the new shape to the QImage until the user releases the mouse button. The underMouse function seems to be the most popular one. When I try use the qwidget to mo I know there is a way to make a widget transparent for mouse events like this: QWidget w; w. I am calling a function upon the mouseReleaseEvent of a QWidget. What is the best way to make this I am working on Qt and using libVlc version 2. setGeometry(x, y, width, height); Layouts. So, I thought I'd add a solution that works well with the current (as of this writing) release of Qt, 5. create QWidget width HWND parent. . I've read the documentation but I don't think there is a mouse state I can verify to find out if mouse cursor is over the given widget. And it gives to a way to pass data about the dragged object to the drop receiver. In I want hide a QWidget when mouse clicks out of that widget just like it have a popup flag: auto widget = new QWidget(this); widget->setWindowFlag(Qt::Popup); // this widget will hide, when mouse click out of that widget. Attempts to move that widget out in the code above resulted in the mouse tracking problem. The event handler QWidget::moveEvent() receives move events. Please help me if anyone knows. I have sub-classed QWidget to draw on it using mouse. Mouse tracking is not an option for me, because the GUI must behave differently when the mouse is moved and the left mouse button is pressed. ) keyReleaseEvent() is called whenever a key is released and while it is held down (if the key is auto-repeating). Qt automatically grabs the mouse when a mouse button is pressed inside a widget; the widget will continue to receive mouse events until the last mouse button is released. 5 for live video streaming. The right half of the text is displayed, but does not respond to clicks. I've got a signal being fired to my parent widget's controller and can determine when the drag is starting and ending correctly. nativeEvent() PySide2. If mouse tracking is switched on, mouse move events occur even if no mouse button is pressed. h. Ask Question Asked 5 years, 11 months ago. The problem itself. For this I am using the following bar code: (bar. Sadly, Qt 5. x in Pycharms. I'm not sure if I made Moving the dialog with mouse didn't call it again. How to capture mouse events on an arbitrary QWidget? 0. Event Filters: Example; Custom event handling Within the event filter, you can check for QEvent::Leave events and implement your desired actions. If it is None (the default), If you call setMouseTracking (true), you get mouse move events even when no buttons are held down. let the circular widget emit a signal each time it is clicked. Event Filters: Example; Local Event Filtering Use QWidget::installEventFilter() to install an event filter for a specific widget. Regardless of whether the button is pressed, the mouse is not being tracked. This property holds the position of the widget within its parent widget. And it wouldn't hurt to throw in a update() call after either one of those. QWidget::setGeometry() Example; Combined operation setGeometry() sets both the widget's position and size in a single call. Another feature I tried While QWidget::leaveEvent() is a direct and effective way to handle mouse leave events in Qt, there are alternative approaches that might be suitable for certain scenarios:. libvlc_video_set_mouse_input(libvlcMediaPlayer,false); But it hides the mouse over vlc. Here we're creating a window, but the Window widget is subclassed from QWidget, meaning you can add this widget I have a QSlider that I want to move to the position of the mouse cursor when the user presses the left mouse button. but how to stop zoom out when the resolution of image equals the original resolution of image and how to use press and hold scroll mouse to move picture when the resolution of image bigger than original resolution of image instead of use left mouse. you'll need to add more logic to only move the window when a mouse button is actually pressed. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I need the ClickableElement class to be able to detect when there is a mouse release event on the Qt widget(s). I seems to me that the mouse hover event is not even occurring. When the button is toggled off, mouse tracking should be off and label_5 not-updated. If you call setMouseTracking(true), you get mouse move events even when no buttons Reimplement the QWidget event handlers, QWidget::mousePressEvent(), QWidget::mouseReleaseEvent(), QWidget::mouseDoubleClickEvent(), and Mouse events occur when a mouse cursor is moved into, out of, or within a widget, and if the widget has the Qt::WA_Hover attribute. 14. pos : QPoint. move() PySide2. I've watched a tuturial converting a . But when I click on vlc,it is not able to throw the mouse event. This is not the case. Mouse events occur when a mouse cursor is moved into, out of, or within a widget, and if the widget has the Qt::WA_Hover attribute. move(x,y) to work. The only reason for reimplementation of So, it's basically a tooltip. ui-based construction) I would say something like The Qt's graphics scene / view system is powerful enough to support dragging of items without you having to write any code to handle low-level mouse events. Viewed 616 times 2 . Use QWidget::mousePressEvent, QWidget::mouseMoveEvent and QWidget::mouseReleaseEvent to know where the user is drawing the shape. Mouse move events are captured wheel events are not. 4. This is how I'm doing it: @yoon, you want to move a widget, let’s say a QPushButton, without having a QGraphicsItem, right? And I say it is possible, but only if you find a way to differentiate between two events: 1. Again, using the move() method of the various things that inherit from QWidget was perfect pre-Wayland. Below, onMouseUp calls the dispatcher, informing the main canvas that we no longer wish to drag the window. Maybe someone has a hint for me on what i am doing wrong. setLayout(self. What I want to do is like this link: When the mouse left button is pressed, start drawing the rectangle. Qt resize widgets in linear layout with mouse. While QWidget::moveEvent() is a powerful tool for customizing widget behavior during movement, it can also lead to unexpected issues if not used correctly. Your mouse move event is not called because your mouse press doesn't happen in your widget, but in the child QGraphicsScene. Event name Class and description 'button_press_event' MouseEvent - mouse button is pressed 'button_release_event' MouseEvent - mouse button is released I want to keep a QWidget (or QDialog) centered to its parent widget. The code (draft) might look like: The `QWidget move()` function in C++ is a method that helps to move a widget to a specific position on the screen. I was not able to do that programmatically. When the mouse left button is released, determine the rectangle shape. Follow edited Jan 22, 2018 at 22:41. While dragging, adjust the rectangle shape with the mouse movement. I am implementing a popup window by inheriting QWidget with flags Qt::QPopup | Qt::QWindow. I took Qt gesture example, it works on tablet, but not reaction on press left mouse button and move (I expect that application recognizes it as tap or swipe event). Draggable QWidget. As you have noticed the canvas is not handled by Qt but by matplotlib so the solution is to use the events provided by that library, if you review the docs you see that there are the following events:. It sounds like you're not implementing all of the mouse events, just the mouseMoveEvent. Mouse move events will occur only when a mouse button is pressed down, unless mouse tracking has been enabled with QWidget::setMouseTracking(). This is a feature of the While QWidget::enterEvent() is a direct way to handle mouse entry events, there are other methods that can be used in certain scenarios:. Is there a clever way to implement it without making a custom widget and writing handlers for all the mouse and focus events and recomputing its ideal position every time I open it or the Opener moves? @Xena_o said in Window widget not moving with move(): wCon->move(x,y); you have to move your widget as QMdiSubWindow not as QWidget (otherwise it moves the widget content inside your MdiWindow and not the whole MdiWindow in your MdiArea. By design clients can't position windows, so QWidget::move() simply doesn't work. moveEvent() PySide2. finalVbox = QVBoxLayout() # Final Layout self. This is a very good answer. If you can get this information otherwise no problem. Commented Oct 12 at 14:13. The QMouseEvent Class page say this : "The functions pos(), x(), and y() give the cursor position relative to the widget that receives the mouse event. Now I'd like the follower to actually follow the QMainWindow when I drag it around. How to I resize an item in a QListWidget upon the resize of the window? In Qt with C++, I created a window with a small QWidget inside. mouseMoveEvent(event) etc). This may seem like a trivial solution, but on my KDE it works (I ran into the same problems originally). But for some bizarre reason, when I apply this logic on a QToolButton (for showing some custom text popup on hovering over it), the button becomes invisible, although hovering over where it is supposed to be reveals the popup all right, and even the cursor becomes pointer as expected, given I set it like that for the button! QWidget Class: The QWidget class is the base class of all user interface objects. You'll need to track the last pixel location, and either draw a line, or add extra points in between the last position and the current position. 1. Mouse events occur when a mouse button is pressed or released inside a widget, or when the mouse cursor is moved. py) from PySide6. 8. In the default state, you have to press the mouse to capture it. QtC Making the item selectable isn't necessary to receive mouse events. In If you shake the mouse a bit without even leaving the widget, the thing fixes itself. ; Intercept events before they reach the widget On mouse press event store the mouse cursor offset relative to the widget, Move your widget so that the mouse cursor will always preserve the initial non zero offset, Reset the offset on mouse release event. mousePressEvent doesnt work on child widgets? 4. setAttribute( Qt::WA_TransparentForMouseEvents ); But this also disables the delivery of mouse events to its children! I want the children of the front widget and the widgets behind the front widget to receive the mouse events. If you move the widget as a result of the mouse event, use the global position returned by globalPos() to avoid a I am trying to make a QWidget follow another one while this is moving. When I move the MainWindow with mouse on clicking windows' title, the MainWindow receive only one moveEvent() when mouse is released. If you override the mouse event handler, then you're ignoring the default behavior. But when I click on QLineEdit, I can't detect the mousePressEvent in QWidget - only in the QLineEdit. I have mouseMoveEvent() is called whenever the mouse moves while a mouse button is held down. Modified 5 years, 11 months ago. addWidget() and removeWidget() are certainly one way to actually perform the move. How to move the QDial object? QDial *dial = new QDial;// dial object dial->setGeometry(e I tried . 0 version all of popup widgets reacted on mouse entering or leaving. show() def WindowGUI(self): self. you need to subtract half of it from the center to position it correctly. If you wish to use QGraphicsView, there's no need to reimplement any of its virtual methods. When starting the automation, it reads the coordinates from the file, sends the appropriate mouse events and would do a pixel comparison with a previously saved screenshot. Is this normal for Qt5 or some bug? With code below only the first popup widget w1 reporting about enterEvent and leaveEvent on mouse I am trying to write a simple application in PyQt5 with one QWidget that has the following two behaviors: Overrides the mouse cursor; Transparent for input; meaning that it can ignore mouse inputs and send it to the background widget or OS UI Assuming you want a coordinate readout as you move the cursor (like in many graphics or CAD applications), you really do not want to override QCursor. I need to capture mouse wheel events outside the control / window if the mouse is button is pressed inside the control then the mouse is moved outside. customwidget. See also. This can be useful during drag and drop operations. In particular, I have a QMainWindow with a button. Is it really required to connect to signals of the parent widget or is there an easier way (something to set)? It's not clear whether "the problem with moving the window around using the titlebar" refers to the user dragging on the title bar of the parent window, or the That user can move anywhere to screenn, but at the same time widget will move in relation to specified X widget. But I want to do something at the moment when mouse stop moving. This button shows a QWidget, the "follower". How to move the whole window when mouse is on the window's custom widget in Qt? 2. QtWidgets. Commented Oct 13 at 3:06. QWidget::mouseReleaseEvent() is essential for handling mouse button release events in Qt widgets. I am trying to restrain the mouse cursor from leaving the QWidget area when dragging and dropping a Qpushbutton I am using dragMoveEvent() which offsets the cursor every time it crosses the border of the widget. This allows the widget to handle all mouse interactions within its application, regardless of the cursor's location on the screen. This function allows you to capture and react to mouse movements within your custom widget, enabling interactive features like: Highlighting elements on hover; Implementing drag-and-drop you can use setMouseTracking() to enable mouse tracking and implement mouseMoveEvent() to check mouse position. To move the mouse without pressing it, you need setMouseTracking(true). The user pressed the mouse on the button with the intent of moving it. If the mouse event is a tap ( press and release with out any move events) then the children of that widget should handle the event, if not, and the events describe a swipe, then the parent widget should handle the events. But I can't select or move my widget. 7. ParametersQMouseEvent *event: A pointer to a QMouseEvent object that provides detailed information about the mouse release event. For mouse press and mouse release events, we use the QMouseEvent::button() function to find out which button caused the event. The ultimate goal is to be able to drag and drop from one widget to the other, moving something between widgets. mainHBox I want to detect if the mouse is over a certain widget in Qt4. I've reimplemented QMainWindow::moveEvent() that updates the follower's position, but there is a huge delay It moves the label so that the upper left corner of it is in the center, which might mean that the label itself lands in the corner if it's big enough. It is possible to use QGestureEvent on Qt/Linux/X11 with ordinary mouse?. By default, all the widgets are on top left corner therefore, there is a need of changing the position of the Mouse move events will occur only when a mouse button is pressed down, unless mouse tracking has been enabled with QWidget::setMouseTracking(). I'm good right now. Because ClickableElement cannot inherit from the managed QWidget instance for the reasons described below, I cannot implement virtual mouseReleaseEvent(). Detailed Description¶. When grabbed, the window calls an event dispatcher that is picked up by main canvas where we drag the windows. ; Implement the eventFilter() method to filter mouse events as needed. I have 2 widgets, a parent and a child widget: Having access to the implementation of the red widget, is it possible to determine the moment when the cursor hovers out of the red widget into the blue widget without implementing any event handlers or deriving the blue widget?. When you click the message box it takes over the mouse grab and everything works as it's supposed to. For mouse press and double click events this includes the Hello, I am using QT 5. In the constructor of my main window (which also does the . QMovableResizableWidget is given no parent widget, on initialization. setGeometry works as intended but the I think that is not the solution. Example; Types of layouts The problem I want to prevent is what happens when I reach the edge of the screen. That's What I want to achieve. g. The function pos() gives the current cursor position, while oldPos() gives the old mouse position. QT drag and drop - Creating a temporary QLabel using qobject_cast. QGraphicsWidget's mouse drag. Since the movement of the item is caused by mouse events, you're preventing it from moving by not calling the default implementation. ui file to . – mahkitah. I think that it is related to how QLineEdit works - I don't know the way to get mouse events within the whole region. Beyond the Click: Exploring Alternatives to QWidget::mouseTracking . I am implementing a function (Using Qt) that is supposed to move a widget to the cursor position as part of a drag and drop functionality. g move the I write desktop application that works with map, and I want to react on pan and long press events. Member Function Documentation QMoveEvent:: QMoveEvent (const QPoint &pos, const QPoint &oldPos) Constructs a move event with the new and old widget positions, pos and oldPos respectively. You can set up a small state machine that provides the boundaries for knowing when a top-level window's position has been altered using a QObject The series of QPushButton widgets in a horizontal layout. The red area has a well defined thickness(e. e. You can call QWidget::mapFromGlobal() to translate it to widget coordinates. Mouse presses that happen I have a Qt application (server) that receives mouse positions and state ( mouse pressed, released or mouse move) over the local network from another Qt application. 3. I need that the function can distinguish when the mouse move event is performed without any How can I use this functionality since it is for QWidget only? If you don't have a widget, you can't move a mouse over it. Here are some common errors and troubleshooting tips: Infinite Recursion: Solution Ensure that any calls to QWidget::move() or other functions that might trigger a move event are made conditionally or I tried to override QWidget::moveEvent and change the event paramters when passing to the parent implementation, but it seems that the movement has been processed already and the result was ugly flickering. I have subclassed QWidget as follows: class myClass : public QWidget { public: explicit myClass(QWidget *parent); protected: void paintEvent(QPaintEvent *event); } myWidget::myWidget(QWidget* And like @LaszloPapp was saying, you need to use resize() and move(). How to get new coordinate of a widget when window is moved? Hot Network Questions What do you call the equivalent of "Cardinal directions" in a hex-grid? void ChildWidget::mousePressEvent(QMouseEvent *event) { offset = event->pos(); } void ChildWidget::mouseMoveEvent(QMouseEvent *event) { //Using left QWidget::setEnabled(false) //like Massimo said In order to reactive the widget, just detect press event inside an object in your application to be able to call `setEnable(true) on your widget ! Qt mouse move events not caught by an event filter. I am trying to get a mouse press event to work with my widget I created but every time I click the widget, the window stops responding and I have to kill the program. A complete example is provided in this answer. ATN_LR_boom. Above, the Grab Offset is where we clicked in that window - it’s later on used when we move it around. The QLineEdit gets the focus automatically; it blinks. I am trying to create a custom image viewer widget with zoom to the mouse position. I read in the mouse state and position correctly but I am not able to generate fake messages in the server app to simulate mouse move, mouse pressed events. If you're going to implement everything yourself, you shouldn't be using QGraphicsView at all. The message handlers (including KDE/linux) repeatedly show mouse movements, but pixels will often be skipped. Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company PySide. QWidget::mapFromGlobal(QCursor::pos()); I've attached an image of how it is a problem. I have tried with . If you want to determine the local mouse coordinates with respect to a widget (this will be in device pixels and relative to the top left corner of the widget I believe) you can use. Any better ideas? The reason why you did not get mouse events in your MyMainWindow class is because in your main() function you create the main window object of class QMainWindow instead. What is QWidget::mouseTracking? In Qt, a framework for building graphical user interfaces (GUIs), QWidget::mouseTracking is a property of a widget that controls whether the widget receives mouse move events even when no mouse buttons are pressed. ) Try mdiArea->activeSubWindow()->move(x, y); (or currentSubWindow()) Detailed Description. Then, in the mouse move event of the QMainWindow, the geometry of the QWidget is set, such that it appears that the user is drawing a rectangle on top of the QMainWindow. 2. I've been hunting around and couldn't find anything that was recent and solved my problem. How to force Qt update the widget under mouse? 4. Now I have set the layout inside qwidget and the showed it. I have a simple Qt application. For example void The QMouseEvent Class page say this : "The functions pos (), x (), and y () give the cursor position relative to the widget that receives the mouse event. Event Filtering: Usage. With 4. According to the doc:. 11 ). gxvdw sxor rajj xxys hudxiokx mrozbtt bwtvx nfpuylr ctjl wzvchdxv