Graphicsview mousemoveevent

Author: qjcz

August undefined, 2024

WebMar 8, 2016 · Teams. Q&A for work. Connect and share knowledge within a single location that is structured and easy to search. Learn more about Teams WebSep 22, 2015 · mouseMoveEvent is not called. An eventFilter is not possible, since that would be installed on the QApplication. The widget is far down in the type hierarchy. Passing this widget up to the main function where the QApplication object is created would mess up the code. void mousePressEvent (QMouseEvent* event); void mouseReleaseEvent …

how to translate or move QGraphicsView by mouse drag?

WebQGraphicsView dragMoveEvent, mouseMoveEvent, mousePressEvent used in the same time 2013-12-12 08:42:54 1 2634 qt / drag / mousemove / qgraphicsview. Using both … WebAug 2, 2024 · void GraphWidget:: mousePressEvent (QMouseEvent *event) { if (event ->button () == Qt::RightButton) { rightMousePressed = true ; _panStartX = event ->x (); … northborough carewell urgent care

Error sending hover exit event · Issue #1499 · pyqtgraph/pyqtgraph

WebMay 14, 2024 · 1. you should create one class that inherits from QGraphicsView. because you need mousePressEvent , mouseReleaseEvent , mouseMoveEvent of QGraphicsView. Then in MainWindow, you need one QGraphicsScene object and I create one QGridLayout and with the addWidget function add my QGraphicsView object to MainWindow UI. So I … WebJul 29, 2008 · QGraphicsView::mouseMoveEvent( event); event - >ignore (); return; } int dx = event - >x () - _last_position. x(); int dy = event - >y () - _last_position. y(); //save … WebApr 20, 2015 · The view will always receive the mouse event first. So, in the view, check to see if the mouse is over an item before allowing it to pan by getting the mouse pos in scene coordinates and retrieving the items at that position with QGraphicsScene::items ( ) Share Improve this answer Follow answered Apr 20, 2015 at 9:28 TheDarkKnight 27k 5 53 84 northborough car insurance

c++ - mouseMoveEvent is not called - Stack Overflow

WebApr 27, 2024 · Pyqt5 QgraphicsView pan past scroll bar limits. I have a set of predetermined X and Y coordinates that I am using to place QGraphicsItem 's as points and then placing each of those points in a QGraphicsView. I have my panning button set to be the middle mouse button, but I can only pan if I have zoomed in. WebDec 12, 2013 · If you set drag mode to QGraphicsView::ScrollHandDrag, the hover events shouldn't be activated during the drag. As long as you call QGraphicsView::mouseMoveEvent from your own mouseMoveEvent function, you should be fine. – thuga Dec 16, 2013 at 8:43 Add a comment 1 Answer Sorted by: 0 … northborough cambridgeshirehttp://www.uwenku.com/question/p-kaajmwjs-do.html northborough capital improvement plan

"Webvoid ImageView::mouseMoveEvent (QMouseEvent *event) { if (_pan) { horizontalScrollBar ()->setValue (horizontalScrollBar ()->value () - (event->x () - _panStartX)); verticalScrollBar ()->setValue (verticalScrollBar ()->value () - (event->y () - _panStartY)); _panStartX = event->x (); _panStartY = event->y (); event->accept (); return; } … " - Graphicsview mousemoveevent

Graphicsview mousemoveevent

c++ - mouseMoveEvent is not called - Stack Overflow

WebQGraphicsView translates the mouse and key events into scene events, (events that inherit QGraphicsSceneEvent ,), and forward them to the visualized scene. In the end, it’s the individual item that handles the events and reacts to them. WebAug 22, 2016 · 3. When a mouse event is generated by Qt it is generally passed initially to the QWidget that was under the mouse pointer when the event was generated. If that QWidget accepts the event then no further processing will take place. If the event isn't accepted then Qt may propogate the event to that QWidget 's parent and so on. In your …

Did you know?

WebThis event class both informs items that the mouse cursor is nearby and allows items to communicate with one another about whether each item will accept *potential* mouse … WebJul 29, 2008 · QGraphicsView::mouseMoveEvent( event); event - >ignore (); return; } int dx = event - >x () - _last_position. x(); int dy = event - >y () - _last_position. y(); //save mouse position _last_position = event - >pos (); qDebug () << "pos: " << event - >pos (). x() << " " << event - >pos (). y(); if ( event - >buttons () == Qt ::LeftButton) {

WebQGraphicsView translates the mouse and key events into scene events, (events that inherit QGraphicsSceneEvent ,), and forward them to the visualized scene. In the end, it's the … WebNov 27, 2024 · Viewed 2k times. 1. I created a where I select a video using QOpenFileDialog and play the video on QGraphicsView. After that I select an area on video using mouse and QRubberBand class and want to draw a rectangle on selected area when I release left mouse click. Since I'm newbie can you tell me which parts of my code is …

WebMay 3, 2024 · I have graphicsview (attached graphicscene)setted as a centralwidget in scene i added 2 rect items (graphicsItem) (both are draggable). when i drag 1 rect item … WebNov 18, 2016 · I have a custom QGraphicsView and QGraphicsScene.Inside QGraphicsScene I have overriden void drawBackground(QPainter *painter, const QRectF &rect) and based on a boolean flag I want to toggle a grid on and off. I tried calling clear() or calling the painter's eraseRect(sceneRect()) inside my function but it didn't work. So after …

WebAug 2, 2013 · You need to implement the mouseMoveEvent function from QGraphicsView and accept the event. protected: virtual void QGraphicsView::mouseMoveEvent (QMouseEvent * event) { QPoint mouseLocation = event->pos (); // Do stuff event->accept (); } Accepting the mouse event prevents a parent class from handling that event.

northborough car repairWebJul 27, 2013 · 2 Answers Sorted by: 3 mousePressEvent and other methods are not slots. You can't use connect on those methods. You need to install an event filter on your view's viewport () and catch events in your widget's eventFilter method. See Event Filters. Share Improve this answer Follow edited Jul 27, 2013 at 20:03 answered Jul 27, 2013 at 15:09 how to replace window sillWebI have a qgraphicsview to plot signal. I would zoom specific area with mouse clicking and rectangle drawing. So I need mouse pressed position and dragged position. ... I can recognize the clicked position but mouseMoveEvent(QMouseEvent * ev) never be calle. and also obj == ui.graphicsView statement in eventFilter never be occurred.What's … northborough cemeteryWeb为了平移，我扩展了View::mousePressEvent,View::mouseReleaseEvent和View::mouseMoveEvent并将I扩展为View::wheelEvent。QGraphicsScene … how to replace windows in log cabinWebApr 18, 2016 · The detail is get the HDC of the QGraphicsView's viewPort. Then in the QMouseEvent of QGraphicsView use "MoveToEx" and "LineTo" drawing two lines on the viewport,then I should do is erase the "old" cursor, It's easy to do this using "setROP2 (HDC dc,R2_NOT)",then draw the old Cursor stored again. how to replace windows on a mobile homeWebJun 9, 2024 · class PDFView (QGraphicsView): def __init__ #somecode... def mousePressEvent (self, event: QtGui.QMouseEvent) -> None: if self.itemAt (event.pos … how to replace windows in a houseWebPython QGraphicsView.mouseMoveEvent - 33 examples found. These are the top rated real world Python examples of PyQt5.QtWidgets.QGraphicsView.mouseMoveEvent extracted … how to replace windows in a brick home