Pyqt メイン ウィンドウとダイアログ ウィンドウの情報を交換する

目次

 1. メインウィンドウがセカンダリウィンドウに渡されます

2. メッセージを交換する

3. 二次ウィンドウで点を描画するかボックスを描画します

---

   

 1. メインウィンドウがセカンダリウィンドウに渡されます

機能: メイン ウィンドウは画像をダイアログ ウィンドウに転送します。

import sys
from PyQt5 import QtWidgets, QtGui, QtCore


# 对话窗口
class Dialog(QtWidgets.QDialog):
    def __init__(self, parent=None):
        super(Dialog, self).__init__(parent)
        self.setWindowTitle("Dialog")

        self.label = QtWidgets.QLabel(self)
        self.label.setFixedSize(300, 300)
        self.label.setAlignment(QtCore.Qt.AlignCenter)

    def set_image(self, image):
        self.label.setPixmap(QtGui.QPixmap.fromImage(image))


# 主窗口：有一个按钮，有一个对话窗口实例，点击此按钮，触发传递图像到窗口实例
class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setWindowTitle("Main Window")

        self.button = QtWidgets.QPushButton("Open Dialog", self)
        self.button.clicked.connect(self.open_dialog)

        self.dialog = Dialog(self)  # 窗口实例

    def open_dialog(self):
        image_path = "path/to/your/image.png"  # 替换为你的图像路径

        image = QtGui.QImage(image_path)
        self.dialog.set_image(image)
        self.dialog.exec_()


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())

2. メッセージを交換する

バージョンアップ版：メインウィンドウからダイアログウィンドウに画像を送信し、画像をクリックした後、クリックした位置をメインウィンドウに送信します。

import sys
from PyQt5 import QtWidgets, QtGui, QtCore


# 对话窗口，点击label中的位置，返回到主窗口
class Dialog(QtWidgets.QDialog):
    position_clicked = QtCore.pyqtSignal(QtCore.QPoint)  # 传递的信号类型：QtCore.QPoint

    def __init__(self, parent=None):
        super(Dialog, self).__init__(parent)
        self.setWindowTitle("Dialog")

        self.label = QtWidgets.QLabel(self)  # 只有一个label部件
        # self.label.setFixedSize(800, 800)
        self.label.setAlignment(QtCore.Qt.AlignCenter)

    def mousePressEvent(self, event):  # 在label部件中点击的坐标
        if event.button() == QtCore.Qt.LeftButton:
            position = event.pos()
            self.position_clicked.emit(position)  # 发送信号

    def set_image(self, image):
        self.label.setFixedSize(image.width(), image.height())  # 图像填满label
        self.label.setPixmap(QtGui.QPixmap.fromImage(image))


# 主窗口：只有一个按钮，一个对话窗口实例，点击按钮触发传递图像到实例窗口，并将信号进行关联。
class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setWindowTitle("Main Window")

        self.button = QtWidgets.QPushButton("Open Dialog", self)  # 点击按钮触发传递图像到实例窗口
        self.button.clicked.connect(self.open_dialog)

        self.dialog = Dialog(self)
        self.dialog.position_clicked.connect(self.handle_position)  # 信号关联

    def open_dialog(self):
        image_path = "/home/zxq/Pictures/1.png"  # 替换为你的图像路径

        image = QtGui.QImage(image_path)
        self.dialog.set_image(image)
        self.dialog.exec_()

    def handle_position(self, position):  # 获取传回信号
        print("Position clicked:", position.x(), position.y())


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())

3. 二次ウィンドウで点を描画するかボックスを描画します

ドローポイント 

 

import sys
import cv2
from PyQt5 import QtWidgets, QtGui, QtCore


# 自定义的QLabel子类，用于在Label部件上绘制点
class DrawingLabel(QtWidgets.QLabel):
    def __init__(self, parent=None):
        super(DrawingLabel, self).__init__(parent)
        self.points = []

    def paintEvent(self, event):
        super(DrawingLabel, self).paintEvent(event)  # 绘制原始图像
        painter = QtGui.QPainter(self)
        painter.setRenderHint(QtGui.QPainter.Antialiasing)
        painter.setPen(QtGui.QPen(QtCore.Qt.red, 5))

        for point in self.points:
            painter.drawPoint(point)


# 对话窗口，点击label图像中的位置，返回到主窗口
class DotLocDialog(QtWidgets.QDialog):
    position_clicked = QtCore.pyqtSignal(QtCore.QPoint)  # 传递的信号类型：QtCore.QPoint

    def __init__(self, parent=None):
        super(DotLocDialog, self).__init__(parent)
        self.setWindowTitle("Dialog")

        self.label = DrawingLabel(self)  # 使用自定义的QLabel子类
        self.label.setAlignment(QtCore.Qt.AlignCenter)

    def mousePressEvent(self, event):  # 在label部件中点击的坐标
        if event.button() == QtCore.Qt.LeftButton:
            position = event.pos()
            self.position_clicked.emit(position)  # 发送信号
            self.label.points.append(position)
            self.label.update()  # 刷新绘制

    def set_image(self, image):
        self.label.setFixedSize(image.width(), image.height())  # 图像填满label
        self.label.setPixmap(QtGui.QPixmap.fromImage(image))
        self.label.points = []  # 清空绘制的点


# 主窗口：只有一个按钮，一个对话窗口实例，点击按钮触发传递图像到实例窗口，并将信号进行关联。
class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setWindowTitle("Main Window")

        self.button = QtWidgets.QPushButton("Open Dialog", self)  # 点击按钮触发传递图像到实例窗口
        self.button.clicked.connect(self.open_dialog)

        self.dialog = DotLocDialog(self)
        self.dialog.position_clicked.connect(self.handle_position)  # 信号关联

    def convert_mat_to_qimage(self, mat):
        height, width, channels = mat.shape
        bytes_per_line = channels * width
        qimage = QtGui.QImage(mat.data, width, height, bytes_per_line, QtGui.QImage.Format_RGB888)
        qimage = qimage.rgbSwapped()
        return qimage

    def open_dialog(self):
        image_path = "/home/zxq/Pictures/1.png"  # 替换为你的图像路径
        img = cv2.imread(image_path)
        image = self.convert_mat_to_qimage(img)
        self.dialog.set_image(image)
        self.dialog.exec_()

    def handle_position(self, position):  # 获取传回信号
        print("Position clicked:", position.x(), position.y())


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())

長方形を描く 

  

import sys
from PyQt5 import QtWidgets, QtGui, QtCore


class DrawingLabel(QtWidgets.QLabel):
    def __init__(self, parent=None):
        super(DrawingLabel, self).__init__(parent)
        self.start_point = None
        self.end_point = None
        self.rectangles = []

    def mousePressEvent(self, event):
        if event.button() == QtCore.Qt.LeftButton:
            self.start_point = event.pos()

    def mouseMoveEvent(self, event):
        if event.buttons() & QtCore.Qt.LeftButton:
            self.end_point = event.pos()
            self.update()

    def mouseReleaseEvent(self, event):
        if event.button() == QtCore.Qt.LeftButton:
            self.end_point = event.pos()
            self.rectangles.append(QtCore.QRect(self.start_point, self.end_point))
            self.update()
            self.parent().handle_rectangles(self.rectangles)

    def paintEvent(self, event):
        super(DrawingLabel, self).paintEvent(event)
        painter = QtGui.QPainter(self)
        painter.setPen(QtGui.QPen(QtCore.Qt.red, 2))

        if self.start_point and self.end_point:
            rect = QtCore.QRect(self.start_point, self.end_point)
            painter.drawRect(rect)


class RegionDialogWindow(QtWidgets.QDialog):
    def __init__(self, image, parent=None):
        super(RegionDialogWindow, self).__init__(parent)
        self.setWindowTitle("Dialog Window")

        self.label = DrawingLabel(self)
        self.label.setPixmap(QtGui.QPixmap.fromImage(image))

        layout = QtWidgets.QVBoxLayout()
        layout.addWidget(self.label)
        self.setLayout(layout)

    def handle_rectangles(self, rectangles):
        self.parent().handle_rectangles(rectangles)


class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setWindowTitle("Main Window")

        self.button = QtWidgets.QPushButton("Open Dialog", self)
        self.button.clicked.connect(self.open_dialog)

    def open_dialog(self):
        image_path = "/home/zxq/Pictures/1.png"
        img = QtGui.QImage(image_path)
        dialog = RegionDialogWindow(img, self)
        dialog.show()

    def handle_rectangles(self, rectangles):
        print("\n")
        for rect in rectangles:
            print("Rectangle:", rect.x(), rect.y(), rect.width(), rect.height())


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())

直線を描きます。

 

import sys

import cv2
from PyQt5 import QtWidgets, QtGui, QtCore


class DrawingLabel(QtWidgets.QLabel):
    def __init__(self, parent=None):
        super(DrawingLabel, self).__init__(parent)
        self.start_point = None
        self.end_point = None
        self.two_pt_dis_list = []

    def mousePressEvent(self, event):
        if event.button() == QtCore.Qt.LeftButton:
            self.start_point = event.pos()

    def mouseMoveEvent(self, event):
        if event.buttons() & QtCore.Qt.LeftButton:
            self.end_point = event.pos()
            self.update()

    def mouseReleaseEvent(self, event):
        if event.button() == QtCore.Qt.LeftButton:
            self.end_point = event.pos()
            self.two_pt_dis_list.append([self.start_point, self.end_point])
            self.update()
            self.parent().handle_two_pts(self.two_pt_dis_list)

    def paintEvent(self, event):
        super(DrawingLabel, self).paintEvent(event)
        painter = QtGui.QPainter(self)
        painter.setPen(QtGui.QPen(QtCore.Qt.red, 2))

        if self.start_point and self.end_point:
            painter.drawLine(self.start_point, self.end_point)


class TwoPtsHeightDialogWindow(QtWidgets.QDialog):
    def __init__(self, image, parent=None):
        super(TwoPtsHeightDialogWindow, self).__init__(parent)
        self.setWindowTitle("Dialog Window")

        self.label = DrawingLabel(self)
        self.label.setPixmap(QtGui.QPixmap.fromImage(image))

        layout = QtWidgets.QVBoxLayout()
        layout.addWidget(self.label)
        self.setLayout(layout)

    def handle_two_pts(self, rectangles):
        self.parent().handle_two_pts(rectangles)


class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.setWindowTitle("Main Window")

        self.button = QtWidgets.QPushButton("Open Dialog", self)
        self.button.clicked.connect(self.open_dialog)

    def open_dialog(self):
        image_path = "/home/zxq/Pictures/1.png"
        self.cv_img = cv2.imread(image_path)
        image = self.convert_mat_to_qimage(self.cv_img)
        dialog = TwoPtsHeightDialogWindow(image, self)
        dialog.show()

    def convert_mat_to_qimage(self, mat):
        height, width, channels = mat.shape
        bytes_per_line = channels * width
        qimage = QtGui.QImage(mat.data, width, height, bytes_per_line, QtGui.QImage.Format_RGB888)
        qimage = qimage.rgbSwapped()
        return qimage

    def handle_two_pts(self, two_pts_list):
        print("\n")
        for two_pts in two_pts_list:
            print(two_pts)


if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    mainWindow = MainWindow()
    mainWindow.show()
    sys.exit(app.exec_())