Graphicsview setscene

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August undefined, 2024

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 …

How to enable Pan and Zoom in a QGraphicsView

WebSep 7, 2024 · I want to display an image using QGraphicsView in a window. I have a basic QGraphicsView and a button based test.ui file generated from QtDesigner tool. Corresponding test.py file: # -*- coding: utf-8 -*- # Form implementation generated from reading ui file 'test.ui' # # Created by: PyQt5 UI code generator 5.9.2 # # WARNING! WebJul 22, 2024 · here is my simple code to display the image in QGraphicsView in pyqt python 3.7. I want an image pixel when the mouse is pressed on a scene or window of QGraphicsView or QGraphicsScene. Mouse Press Function Mouse Press Event Handler def mousePressEvent (self): p = QtGui.QCursor.pos () print ("pressed here: ", p) Mouse … slow draining sewer line

基于QT怎么绘制一个漂亮的预警仪表-PHP博客-李雷博客

WebApr 1, 2024 · 文章目录源码untitled.pymain.py 缩放图形界面使用Qt Designer绘制，如下菜单项添加一个open选项，窗口上是一个graphicsView组件。主要流程使用opencv 打开图片cv2转为QImageQImage转… WebNov 5, 2016 · 3 Answers Sorted by: 1 You want sceneRect not just width and height. For the scaling on resize you want to connect a slot to sceneRectChanged so you can resize the image whenever the scene changes size. Or you can derive a QGraphicsView with an overridden updateSceneRect that changes the image size, or better yet, just override … WebMar 15, 2024 · myview.cpp: myview::myview () : QGraphicsView () { _scene = new myscene (); this->setScene (_scene); this->showMaximized (); } myview::~myview () { delete _scene; } Share Improve this answer Follow edited Mar 18, 2024 at 13:53 answered Mar 18, 2024 at 12:28 tyler 13 4 As it’s currently written, your answer is unclear. software ebc-a20

Python QGraphicsView.setScene Examples, …

WebApr 9, 2024 · 以下是用Qt实现漂亮预警仪表的步骤和代码：. 1.创建一个Qt项目，并添加一个主窗口。. 2.在主窗口中添加QGraphicsView控件，用于绘制预警仪表。. 3.创建一个QGraphicsScene对象，并将其设置为QGraphicsView的场景。. QGraphicsScene *scene = new QGraphicsScene(this); ui->graphicsView ... WebMar 15, 2015 · how to set exact scene rect in QGraphicsView. I have problem with QGraphicsView, I don't know how to set the exact viewport for QGraphicsView. for … software ebpWebJun 30, 2024 · GPUView ( GPUView.exe) is a development tool that reads logged video and kernel events from an event trace log (.etl) file and presents the data graphically to the … software eau

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Graphicsview setscene

WebNov 6, 2024 · Have a QGraphicsView. Set the QGraphicsView's scene with your QGraphicsScene Have your own QGraphicsPathItem so you can set properties you need. Have the implementation of what you want to draw inside your scene, so it … WebMar 2, 2024 · 1 Answer Sorted by: 1 The QUrl ("/path/of/video") is not a valid url since the scheme file that indicates that it is a local file is not deduced, there are 2 possible solutions to this: player->setMedia (QUrl::fromLocalFile (newString)); or player->setMedia (QUrl::fromUserInput (newString));

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WebAdjust Video Image Settings. Use the controls on this page to fine tune the image settings for video content on your display. Select one of the test images to monitor your changes. … WebMar 6, 2013 · ui->graphicsView->scene()->addItem(new QGraphicsPixmapItem(QPixmap::fromImage(image))); Everything that inherits from QObject can own (and be owned by) other QObject classes. When a QObject is destroyed, it calls 'delete' on all its children. QObject classes want to 'own' their children. By 'own' I mean …

WebPython QGraphicsView.setScene - 16 examples found. These are the top rated real world Python examples of PyQt4QtGui.QGraphicsView.setScene extracted from open source … Web文章目录源码untitled.pymain.py缩放图形界面使用Qt Designer绘制，如下菜单项添加一个open选项，窗口上是一个graphicsView组件。主要流程使用opencv 打开图片cv2转为QImageQImage转为QPixmap把QPixmap加入到QGr...

WebApr 22, 2016 · MainWindow::MainWindow (QWidget *parent) : QMainWindow (parent), ui (new Ui::MainWindow) { ui->setupUi (this); // Set up graphics view scene = new QGraphicsScene (this); drawMyWidget (); scene->setSceneRect (-1.25, -1.25, 2.5, 2.5); // your scene's bounding rect here... ui->graphicsView->setScene (scene); ui … WebFeb 17, 2016 · scene = QGraphicsScene(self) scaled_image = Image.fromarray(np.uint8(self.image*255)) imgQ = ImageQt(scaled_image) pixMap = QtGui.QPixmap.fromImage(imgQ) scene.addPixmap(pixMap) self.graphicsView.setScene(scene) I reverse engineered from solutions to colormap …

WebMar 16, 2016 · auto graphicsView = new QGraphicsView (); auto scene = new QGraphicsScene (); graphicsView->setScene (scene); auto parent1 = new QGraphicsRectItem (0, 0, 100, 200); parent1->setBrush (QBrush (QColor (Qt::cyan))); scene->addItem (parent); auto subRect1 = new QGraphicsRectItem (10, 10, 50, 50, …

WebMay 7, 2024 · The image is stored using a 24-bit RGB format (8-8-8). If your image has 3 channels then your way is correct to continue, except adding this: QImage image = QImage (inputImage.data, inputImage.cols, inputImage.rows, QImage::Format_RGB888).rgbSwapped (); You need to add at the end rgbSwapped () … software dymo 400Web我在自定义QGraphicView类中移动QGraphicItem时遇到问题。. 我想做的是通过单击鼠标左键选择该项目，然后将其移动到我单击鼠标右键的位置。. 我非常怀疑我的问题是QGraphicsItem :: setPos ()要求坐标位于父坐标中，并且我不确定要使用QMouseEvent :: * Pos ()的哪个以及如何 ... software ecologyWebApr 11, 2024 · 以下是用Qt实现漂亮预警仪表的步骤和代码：. 创建一个Qt项目，并添加一个主窗口。. 在主窗口中添加QGraphicsView控件，用于绘制预警仪表。. 创建一个QGraphicsScene对象，并将其设置为QGraphicsView的场景。. QGraphicsScene *scene = new QGraphicsScene (this); ui->graphicsView->setScene ... software eccnhttp://www.iotword.com/2460.html software ebook reader free downloadWebApr 14, 2024 · 1 Answer. Sorted by: 2. Make sure that Graphics View widget is added to your MainWindow form (usually mainwindow.ui file) in Design section of QtCreator. Check if its objectName is actually graphicsView. Try to … software echoWebJun 18, 2012 · It working fine allready, there are just graphic artifacts. The canvas / QGraphicsView refreshes it not fast enough I think, so they are "lines" during refreshment. Time for image to be displayed: 70 ms, flicker time: 30 ms. So its 100 ms = 10 FPS per second. I had though this would be possible without using the gpu. software ecWebFeb 3, 2014 · QGraphicsView (parent) { scene = new QGraphicsScene (); this->setSceneRect (50, 50, 350, 350); this->setScene (scene); } void MyGraphicsView::mousePressEvent (QMouseEvent * e) { double rad = 1; QPointF pt = mapToScene (e->pos ()); scene->addEllipse (pt.x ()-rad, pt.y ()-rad, rad 2.0, rad 2.0, … software ecu