PYQT图形视图imag的像素值

from PyQt5 import QtCore, QtGui, QtWidgets class Ui_MainWindow(object): def setupUi(self, MainWindow): MainWindow.setObjectName("MainWindow") MainWindow.resize(818, 814) self.centralwidget = QtWidgets.QWidget(MainWindow) self.centralwidget.setObjectName("centralwidget") self.gridLayout = QtWidgets.QGridLayout(self.centralwidget) self.gridLayout.setObjectName("gridLayout") self.Button_LoadPhoto = QtWidgets.QPushButton(self.centralwidget) self.Button_LoadPhoto.setObjectName("Button_LoadPhoto") self.gridLayout.addWidget(self.Button_LoadPhoto, 1, 0, 1, 1) self.splitter = QtWidgets.QSplitter(self.centralwidget) self.splitter.setOrientation(QtCore.Qt.Horizontal) self.splitter.setObjectName("splitter") self.mdiArea = QtWidgets.QMdiArea(self.splitter) self.mdiArea.setObjectName("mdiArea") self.verticalLayoutWidget = QtWidgets.QWidget(self.splitter) self.verticalLayoutWidget.setObjectName("verticalLayoutWidget") self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalLayoutWidget) self.verticalLayout.setContentsMargins(0, 0, 0, 0) self.verticalLayout.setObjectName("verticalLayout") self.tabWidget_Calb = QtWidgets.QTabWidget(self.verticalLayoutWidget) self.tabWidget_Calb.setObjectName("tabWidget_Calb") self.tab_calibration = QtWidgets.QWidget() self.tab_calibration.setObjectName("tab_calibration") self.gridLayout_3 = QtWidgets.QGridLayout(self.tab_calibration) self.gridLayout_3.setContentsMargins(0, 0, 0, 0) self.gridLayout_3.setObjectName("gridLayout_3") self.UserInput_Calibration_ScaleFactor = QtWidgets.QLineEdit(self.tab_calibration) self.UserInput_Calibration_ScaleFactor.setObjectName("UserInput_Calibration_ScaleFactor") self.gridLayout_3.addWidget(self.UserInput_Calibration_ScaleFactor, 2, 2, 1, 2) self.txt_Calibration_ScaleFactor = QtWidgets.QLabel(self.tab_calibration) self.txt_Calibration_ScaleFactor.setObjectName("txt_Calibration_ScaleFactor") self.gridLayout_3.addWidget(self.txt_Calibration_ScaleFactor, 2, 1, 1, 1) self.txt_Calibration_X1 = QtWidgets.QLabel(self.tab_calibration) self.txt_Calibration_X1.setObjectName("txt_Calibration_X1") self.gridLayout_3.addWidget(self.txt_Calibration_X1, 0, 0, 1, 1) self.UserInput_Calibration_X1 = QtWidgets.QLineEdit(self.tab_calibration) self.UserInput_Calibration_X1.setObjectName("UserInput_Calibration_X1") self.gridLayout_3.addWidget(self.UserInput_Calibration_X1, 0, 1, 1, 1) self.txt_Calibration_Y1 = QtWidgets.QLabel(self.tab_calibration) self.txt_Calibration_Y1.setObjectName("txt_Calibration_Y1") self.gridLayout_3.addWidget(self.txt_Calibration_Y1, 1, 0, 1, 1) self.UserInput_Calibration_X2 = QtWidgets.QLineEdit(self.tab_calibration) self.UserInput_Calibration_X2.setObjectName("UserInput_Calibration_X2") self.gridLayout_3.addWidget(self.UserInput_Calibration_X2, 0, 3, 1, 1) self.UserInput_Calibration_Y2 = QtWidgets.QLineEdit(self.tab_calibration) self.UserInput_Calibration_Y2.setObjectName("UserInput_Calibration_Y2") self.gridLayout_3.addWidget(self.UserInput_Calibration_Y2, 1, 3, 1, 1) self.txt_Calibration_X2 = QtWidgets.QLabel(self.tab_calibration) self.txt_Calibration_X2.setObjectName("txt_Calibration_X2") self.gridLayout_3.addWidget(self.txt_Calibration_X2, 0, 2, 1, 1) self.UserInput_Calibration_Y1 = QtWidgets.QLineEdit(self.tab_calibration) self.UserInput_Calibration_Y1.setObjectName("UserInput_Calibration_Y1") self.gridLayout_3.addWidget(self.UserInput_Calibration_Y1, 1, 1, 1, 1) self.txt_Calibration_Y2 = QtWidgets.QLabel(self.tab_calibration) self.txt_Calibration_Y2.setObjectName("txt_Calibration_Y2") self.gridLayout_3.addWidget(self.txt_Calibration_Y2, 1, 2, 1, 1) self.horizontalLayout = QtWidgets.QHBoxLayout() self.horizontalLayout.setObjectName("horizontalLayout") self.txt_scale = QtWidgets.QLabel(self.tab_calibration) self.txt_scale.setObjectName("txt_scale") self.horizontalLayout.addWidget(self.txt_scale) self.radioButton_Log = QtWidgets.QRadioButton(self.tab_calibration) self.radioButton_Log.setEnabled(True) self.radioButton_Log.setChecked(True) self.radioButton_Log.setObjectName("radioButton_Log") self.horizontalLayout.addWidget(self.radioButton_Log) self.radioButton_Linear = QtWidgets.QRadioButton(self.tab_calibration) self.radioButton_Linear.setObjectName("radioButton_Linear") self.horizontalLayout.addWidget(self.radioButton_Linear) self.gridLayout_3.addLayout(self.horizontalLayout, 5, 0, 1, 4) self.txt_Calibration_X1.raise_() self.UserInput_Calibration_X1.raise_() self.txt_Calibration_Y1.raise_() self.UserInput_Calibration_Y1.raise_() self.txt_Calibration_X2.raise_() self.UserInput_Calibration_X2.raise_() self.txt_Calibration_Y2.raise_() self.UserInput_Calibration_Y2.raise_() self.UserInput_Calibration_ScaleFactor.raise_() self.txt_Calibration_ScaleFactor.raise_() self.tabWidget_Calb.addTab(self.tab_calibration, "") self.verticalLayout.addWidget(self.tabWidget_Calb) self.tabWidget_2 = QtWidgets.QTabWidget(self.verticalLayoutWidget) self.tabWidget_2.setObjectName("tabWidget_2") self.tab_PValues = QtWidgets.QWidget() self.tab_PValues.setObjectName("tab_PValues") self.gridLayout_2 = QtWidgets.QGridLayout(self.tab_PValues) self.gridLayout_2.setContentsMargins(0, 0, 0, 0) self.gridLayout_2.setObjectName("gridLayout_2") self.txt_PixelValue_G = QtWidgets.QLabel(self.tab_PValues) self.txt_PixelValue_G.setObjectName("txt_PixelValue_G") self.gridLayout_2.addWidget(self.txt_PixelValue_G, 2, 0, 1, 1) self.txt_PixelValue_R = QtWidgets.QLabel(self.tab_PValues) self.txt_PixelValue_R.setObjectName("txt_PixelValue_R") self.gridLayout_2.addWidget(self.txt_PixelValue_R, 1, 0, 1, 1) self.txt_PixelValue_Y = QtWidgets.QLabel(self.tab_PValues) self.txt_PixelValue_Y.setObjectName("txt_PixelValue_Y") self.gridLayout_2.addWidget(self.txt_PixelValue_Y, 0, 3, 1, 1) self.UserInput_PixelValue_Y = QtWidgets.QLineEdit(self.tab_PValues) self.UserInput_PixelValue_Y.setObjectName("UserInput_PixelValue_Y") self.gridLayout_2.addWidget(self.UserInput_PixelValue_Y, 0, 4, 1, 1) self.UserInput_PixelValue_X = QtWidgets.QLineEdit(self.tab_PValues) self.UserInput_PixelValue_X.setObjectName("UserInput_PixelValue_X") self.gridLayout_2.addWidget(self.UserInput_PixelValue_X, 0, 1, 1, 1) self.txt_PixelValue_X = QtWidgets.QLabel(self.tab_PValues) self.txt_PixelValue_X.setObjectName("txt_PixelValue_X") self.gridLayout_2.addWidget(self.txt_PixelValue_X, 0, 0, 1, 1) self.UserInput_PixelValue_R = QtWidgets.QLineEdit(self.tab_PValues) self.UserInput_PixelValue_R.setObjectName("UserInput_PixelValue_R") self.gridLayout_2.addWidget(self.UserInput_PixelValue_R, 1, 1, 1, 1) self.UserInput_PixelValue_G = QtWidgets.QLineEdit(self.tab_PValues) self.UserInput_PixelValue_G.setObjectName("UserInput_PixelValue_G") self.gridLayout_2.addWidget(self.UserInput_PixelValue_G, 2, 1, 1, 1) self.UserInput_PixelValue_B = QtWidgets.QLineEdit(self.tab_PValues) self.UserInput_PixelValue_B.setObjectName("UserInput_PixelValue_B") self.gridLayout_2.addWidget(self.UserInput_PixelValue_B, 3, 1, 1, 1) self.txt_PixelValue_B = QtWidgets.QLabel(self.tab_PValues) self.txt_PixelValue_B.setObjectName("txt_PixelValue_B") self.gridLayout_2.addWidget(self.txt_PixelValue_B, 3, 0, 1, 1) self.tabWidget_2.addTab(self.tab_PValues, "") self.tab_Statistics = QtWidgets.QWidget() self.tab_Statistics.setObjectName("tab_Statistics") self.tabWidget_2.addTab(self.tab_Statistics, "") self.verticalLayout.addWidget(self.tabWidget_2) self.tabWidget_3 = QtWidgets.QTabWidget(self.verticalLayoutWidget) self.tabWidget_3.setObjectName("tabWidget_3") self.tab_History = QtWidgets.QWidget() self.tab_History.setObjectName("tab_History") self.tabWidget_3.addTab(self.tab_History, "") self.verticalLayout.addWidget(self.tabWidget_3) self.gridLayout.addWidget(self.splitter, 0, 0, 1, 1) MainWindow.setCentralWidget(self.centralwidget) self.menubar = QtWidgets.QMenuBar(MainWindow) self.menubar.setGeometry(QtCore.QRect(0, 0, 818, 21)) self.menubar.setObjectName("menubar") self.menuFile = QtWidgets.QMenu(self.menubar) self.menuFile.setObjectName("menuFile") self.menuEdit = QtWidgets.QMenu(self.menubar) self.menuEdit.setObjectName("menuEdit") self.menuImages = QtWidgets.QMenu(self.menubar) self.menuImages.setObjectName("menuImages") self.menuWindow = QtWidgets.QMenu(self.menubar) self.menuWindow.setObjectName("menuWindow") self.menuHelp = QtWidgets.QMenu(self.menubar) self.menuHelp.setObjectName("menuHelp") MainWindow.setMenuBar(self.menubar) self.statusbar = QtWidgets.QStatusBar(MainWindow) self.statusbar.setObjectName("statusbar") MainWindow.setStatusBar(self.statusbar) self.TopToolBar = QtWidgets.QToolBar(MainWindow) self.TopToolBar.setObjectName("TopToolBar") MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.TopToolBar) self.LeftToolBar = QtWidgets.QToolBar(MainWindow) self.LeftToolBar.setObjectName("LeftToolBar") MainWindow.addToolBar(QtCore.Qt.LeftToolBarArea, self.LeftToolBar) self.actionNew = QtWidgets.QAction(MainWindow) self.actionNew.setObjectName("actionNew") self.actionOpen = QtWidgets.QAction(MainWindow) self.actionOpen.setObjectName("actionOpen") self.menuFile.addAction(self.actionNew) self.menuFile.addAction(self.actionOpen) self.menubar.addAction(self.menuFile.menuAction()) self.menubar.addAction(self.menuEdit.menuAction()) self.menubar.addAction(self.menuImages.menuAction()) self.menubar.addAction(self.menuWindow.menuAction()) self.menubar.addAction(self.menuHelp.menuAction()) self.retranslateUi(MainWindow) self.tabWidget_Calb.setCurrentIndex(0) self.tabWidget_2.setCurrentIndex(0) self.tabWidget_3.setCurrentIndex(0) QtCore.QMetaObject.connectSlotsByName(MainWindow) def retranslateUi(self, MainWindow): _translate = QtCore.QCoreApplication.translate MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow")) self.Button_LoadPhoto.setText(_translate("MainWindow", "Load Photo")) self.txt_Calibration_ScaleFactor.setText(_translate("MainWindow", "Scale Factor:")) self.txt_Calibration_X1.setText(_translate("MainWindow", "X1")) self.txt_Calibration_Y1.setText(_translate("MainWindow", "Y1:")) self.txt_Calibration_X2.setText(_translate("MainWindow", "X2:")) self.txt_Calibration_Y2.setText(_translate("MainWindow", "Y2:")) self.txt_scale.setText(_translate("MainWindow", "Scale:")) self.radioButton_Log.setText(_translate("MainWindow", "Logarithmic")) self.radioButton_Linear.setText(_translate("MainWindow", "Linear")) self.tabWidget_Calb.setTabText(self.tabWidget_Calb.indexOf(self.tab_calibration), _translate("MainWindow", "Calibration")) self.txt_PixelValue_G.setText(_translate("MainWindow", "G")) self.txt_PixelValue_R.setText(_translate("MainWindow", "R")) self.txt_PixelValue_Y.setText(_translate("MainWindow", "Y:")) self.txt_PixelValue_X.setText(_translate("MainWindow", "X:")) self.txt_PixelValue_B.setText(_translate("MainWindow", "B")) self.tabWidget_2.setTabText(self.tabWidget_2.indexOf(self.tab_PValues), _translate("MainWindow", "Pixel Values")) self.tabWidget_2.setTabText(self.tabWidget_2.indexOf(self.tab_Statistics), _translate("MainWindow", "Statistics")) self.tabWidget_3.setTabText(self.tabWidget_3.indexOf(self.tab_History), _translate("MainWindow", "History")) self.menuFile.setTitle(_translate("MainWindow", "File")) self.menuEdit.setTitle(_translate("MainWindow", "Edit")) self.menuImages.setTitle(_translate("MainWindow", "Images")) self.menuWindow.setTitle(_translate("MainWindow", "Window")) self.menuHelp.setTitle(_translate("MainWindow", "Help")) self.TopToolBar.setWindowTitle(_translate("MainWindow", "toolBar_2")) self.LeftToolBar.setWindowTitle(_translate("MainWindow", "toolBar")) self.actionNew.setText(_translate("MainWindow", "New")) self.actionOpen.setText(_translate("MainWindow", "Open")) if __name__ == "__main__": import sys app = QtWidgets.QApplication(sys.argv) MainWindow = QtWidgets.QMainWindow() ui = Ui_MainWindow() ui.setupUi(MainWindow) MainWindow.show() sys.exit(app.exec_())

from PyQt5 import QtCore, QtGui, QtWidgets class Ui_GraphicsArea(object): def setupUi(self, GraphicsArea): GraphicsArea.setObjectName("GraphicsArea") GraphicsArea.resize(400, 300) self.gridLayout = QtWidgets.QGridLayout(GraphicsArea) self.gridLayout.setObjectName("gridLayout") self.scrollArea = QtWidgets.QScrollArea(GraphicsArea) self.scrollArea.setWidgetResizable(True) self.scrollArea.setObjectName("scrollArea") self.scrollAreaWidgetContents = QtWidgets.QWidget() self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 380, 280)) self.scrollAreaWidgetContents.setObjectName("scrollAreaWidgetContents") self.gridLayout_2 = QtWidgets.QGridLayout(self.scrollAreaWidgetContents) self.gridLayout_2.setContentsMargins(0, 0, 0, 0) self.gridLayout_2.setObjectName("gridLayout_2") self.PictureArea = QtWidgets.QGraphicsView(self.scrollAreaWidgetContents) self.PictureArea.setObjectName("PictureArea") self.gridLayout_2.addWidget(self.PictureArea, 0, 0, 1, 1) self.scrollArea.setWidget(self.scrollAreaWidgetContents) self.gridLayout.addWidget(self.scrollArea, 0, 0, 1, 1) self.retranslateUi(GraphicsArea) QtCore.QMetaObject.connectSlotsByName(GraphicsArea) def retranslateUi(self, GraphicsArea): _translate = QtCore.QCoreApplication.translate GraphicsArea.setWindowTitle(_translate("GraphicsArea", "Form")) if __name__ == "__main__": import sys app = QtWidgets.QApplication(sys.argv) GraphicsArea = QtWidgets.QWidget() ui = Ui_GraphicsArea() ui.setupUi(GraphicsArea) GraphicsArea.show() sys.exit(app.exec_())

import sys from PyQt5.QtCore import * from PyQt5.QtGui import * from PyQt5.QtWidgets import * from GraphicsArea_GUI import * class LoadPicture(QWidget): MousePositionSignal = pyqtSignal(object) def __init__(self, parent=None): QWidget.__init__(self, parent) self.GraphicAreaGUI = Ui_GraphicsArea() self.GraphicAreaGUI.setupUi(self) self.setUpLoadInputUi() self.GraphicAreaGUI.PictureArea.viewport().installEventFilter(self) def setUpLoadInputUi(self): pass self.scene=QGraphicsScene() self.pixitem=QGraphicsPixmapItem() self.grali=[] def setpicture(self,pixmap): self.pixitem.setPixmap(pixmap) self.grali.append(self.pixitem) self.scene.addItem(self.grali[-1]) self.GraphicAreaGUI.PictureArea.setScene(self.scene) self.GraphicAreaGUI.PictureArea.show() self.GraphicAreaGUI.PictureArea.setMouseTracking(True) def eventFilter(self, source, event): if (event.type() == QEvent.MouseMove and source is self.GraphicAreaGUI.PictureArea.viewport()): self.MousePositionSignal.emit(event) return QWidget.eventFilter(self, source, event)

1条回答

网友

1楼 · 发布于 2024-09-28 19:31:35

当您滚动滚动条时，您得到的值是错误的，因为坐标是相对于窗口而不是图像的，要获得正确的坐标，一种简单的方法就是覆盖QGraphicsPixmapItem的hoverMoveEvent方法，所以我们创建一个继承的类。问题是QGraphicsItem不是从QObject继承的，因此它们不能发出信号，一个简单的解决方案是创建一个发出信号的类，并将其一个实例传递给自定义QGraphicsPixmapItem类。在

class LogObject(QObject):
    MousePixmapSignal = pyqtSignal(QPoint, QColor)


class PictureItem(QGraphicsPixmapItem):
    def __init__(self, log, *args, **kwargs):
        QGraphicsPixmapItem.__init__(self, *args, **kwargs)
        self.setAcceptHoverEvents(True)
        self.log = log

    def hoverMoveEvent(self, event):
        point = event.pos().toPoint()
        color = QColor(self.pixmap().toImage().pixel(point.x(), point.y()))
        self.log.MousePixmapSignal.emit(point, color)
        QGraphicsPixmapItem.hoverMoveEvent(self, event)

    def hoverEnterEvent(self, event):
        QApplication.setOverrideCursor(Qt.CrossCursor)
        QGraphicsPixmapItem.hoverMoveEvent(self, event)

    def hoverLeaveEvent(self, event):
        QApplication.setOverrideCursor(Qt.ArrowCursor)
        QGraphicsPixmapItem.hoverLeaveEvent(self, event)


class LoadPicture(QWidget, Ui_GraphicsArea):
    def __init__(self, pixmap, parent=None):
        QWidget.__init__(self, parent)
        self.setupUi(self)
        self.log = LogObject(self)
        self.PictureArea.setScene(QGraphicsScene())
        self.item = PictureItem(self.log, pixmap)
        self.PictureArea.scene().addItem(self.item)
        self.resize(pixmap.size())

然后在必要时创建对象，并连接必要的元素：

^{pr2}$

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