StockDialog.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
Created on 2022年12月12日
@site: https://pyqt.site , https://github.com/PyQt5
@description: QPainter绘制各种图形
"""
import sys

try:
    from PyQt5.QtWidgets import QApplication, QWidget, qApp
    from PyQt5.QtGui import QPainter, QFont, QColor, QPixmap
    from PyQt5.QtCore import Qt, pyqtSignal, QPointF
    from PyQt5.Qt import QPoint, QPolygon, QSplitter, QFrame, QGridLayout, QLabel,\
        QComboBox, QSpinBox, QPalette, QStackedWidget, QVBoxLayout,\
        QPushButton, QColorDialog, QPen,QLinearGradient, QConicalGradient,\
        QRadialGradient, QBrush, QRect, QPainterPath, QFileDialog
except ImportError:
    from PySide2.QtWidgets import QApplication, QWidget, qApp
    from PySide2.QtGui import QPainter, QFont, QColor, QPixmap
    from PySide2.QtCore import Qt, pyqtSignal, QPointF
    from PySide2.Qt import QPoint, QPolygon, QSplitter, QFrame, QGridLayout, QLabel,\
        QComboBox, QSpinBox, QPalette, QStackedWidget, QVBoxLayout,\
        QPushButton, QColorDialog, QPen, QLinearGradient, QConicalGradient,\
        QRadialGradient, QBrush, QRect , QPainterPath, QFileDialog


class StockDialog(QWidget):
    def __init__(self, parent=None):
        super(StockDialog, self).__init__(parent)
        self.setWindowTitle("QPainter绘制各种图形")

        mainSplitter = QSplitter(Qt.Horizontal)
        mainSplitter.setOpaqueResize(True)
        frame = QFrame(mainSplitter)
        mainLayout = QGridLayout(frame)
        mainLayout.setSpacing(6)

        label1 = QLabel("形状：")
        label2 = QLabel("画笔线宽：")
        label3 = QLabel("画笔颜色：")
        label4 = QLabel("画笔风格：")
        label5 = QLabel("画笔顶端：")
        label6 = QLabel("画笔连接点：")
        label7 = QLabel("画刷风格：")
        label8 = QLabel("画刷颜色：")

        self.shapeComboBox = QComboBox()
        self.shapeComboBox.addItem("Line", "Line")
        self.shapeComboBox.addItem("Rectangle", "Rectangle")
        self.shapeComboBox.addItem('Rounded Rectangle', 'Rounded Rectangle')
        self.shapeComboBox.addItem('Ellipse', 'Ellipse')
        self.shapeComboBox.addItem('Pie', 'Pie')
        self.shapeComboBox.addItem('Chord', 'Chord')
        self.shapeComboBox.addItem('Path', 'Path')
        self.shapeComboBox.addItem('Polygon', 'Polygon')
        self.shapeComboBox.addItem('Polyline', 'Polyline')
        self.shapeComboBox.addItem('Arc', 'Arc')
        self.shapeComboBox.addItem('Points', 'Points')
        self.shapeComboBox.addItem('Text', 'Text')
        self.shapeComboBox.addItem('Pixmap', 'Pixmap')

        self.widthSpinBox = QSpinBox()
        self.widthSpinBox.setRange(0, 20)

        self.penColorFrame = QFrame()
        self.penColorFrame.setAutoFillBackground(True)
        self.penColorFrame.setPalette(QPalette(Qt.blue))
        self.penColorPushButton = QPushButton("更改")

        self.penStyleComboBox = QComboBox()
        self.penStyleComboBox.addItem("Solid", Qt.SolidLine)
        self.penStyleComboBox.addItem('Dash', Qt.DashLine)
        self.penStyleComboBox.addItem('Dot', Qt.DotLine)
        self.penStyleComboBox.addItem('Dash Dot', Qt.DashDotLine)
        self.penStyleComboBox.addItem('Dash Dot Dot', Qt.DashDotDotLine)
        self.penStyleComboBox.addItem('None', Qt.NoPen)

        self.penCapComboBox = QComboBox()
        self.penCapComboBox.addItem("Flat", Qt.FlatCap)
        self.penCapComboBox.addItem('Square', Qt.SquareCap)
        self.penCapComboBox.addItem('Round', Qt.RoundCap)

        self.penJoinComboBox = QComboBox()
        self.penJoinComboBox.addItem("Miter", Qt.MiterJoin)
        self.penJoinComboBox.addItem('Bebel', Qt.BevelJoin)
        self.penJoinComboBox.addItem('Round', Qt.RoundJoin)

        self.brushStyleComboBox = QComboBox()
        self.brushStyleComboBox.addItem("Linear Gradient", Qt.LinearGradientPattern)
        self.brushStyleComboBox.addItem('Radial Gradient', Qt.RadialGradientPattern)
        self.brushStyleComboBox.addItem('Conical Gradient', Qt.ConicalGradientPattern)
        self.brushStyleComboBox.addItem('Texture', Qt.TexturePattern)
        self.brushStyleComboBox.addItem('Solid', Qt.SolidPattern)
        self.brushStyleComboBox.addItem('Horizontal', Qt.HorPattern)
        self.brushStyleComboBox.addItem('Vertical', Qt.VerPattern)
        self.brushStyleComboBox.addItem('Cross', Qt.CrossPattern)
        self.brushStyleComboBox.addItem('Backward Diagonal', Qt.BDiagPattern)
        self.brushStyleComboBox.addItem('Forward Diagonal', Qt.FDiagPattern)
        self.brushStyleComboBox.addItem('Diagonal Cross', Qt.DiagCrossPattern)
        self.brushStyleComboBox.addItem('Dense 1', Qt.Dense1Pattern)
        self.brushStyleComboBox.addItem('Dense 2', Qt.Dense2Pattern)
        self.brushStyleComboBox.addItem('Dense 3', Qt.Dense3Pattern)
        self.brushStyleComboBox.addItem('Dense 4', Qt.Dense4Pattern)
        self.brushStyleComboBox.addItem('Dense 5', Qt.Dense5Pattern)
        self.brushStyleComboBox.addItem('Dense 6', Qt.Dense6Pattern)
        self.brushStyleComboBox.addItem('Dense 7', Qt.Dense7Pattern)
        self.brushStyleComboBox.addItem('None', Qt.NoBrush)

        self.brushColorFrame = QFrame()
        self.brushColorFrame.setAutoFillBackground(True)
        self.brushColorFrame.setPalette(QPalette(Qt.green))
        self.brushColorPushButton = QPushButton("更改")

        labelCol = 0
        contentCol = 1

        # 建立布局
        mainLayout.addWidget(label1, 1, labelCol)
        mainLayout.addWidget(self.shapeComboBox, 1, contentCol)
        mainLayout.addWidget(label2, 2, labelCol)
        mainLayout.addWidget(self.widthSpinBox, 2, contentCol)
        mainLayout.addWidget(label3, 4, labelCol)
        mainLayout.addWidget(self.penColorFrame, 4, contentCol)
        mainLayout.addWidget(self.penColorPushButton, 4, 3)
        mainLayout.addWidget(label4, 6, labelCol)
        mainLayout.addWidget(self.penStyleComboBox, 6, contentCol)
        mainLayout.addWidget(label5, 8, labelCol)
        mainLayout.addWidget(self.penCapComboBox, 8, contentCol)
        mainLayout.addWidget(label6, 10, labelCol)
        mainLayout.addWidget(self.penJoinComboBox, 10, contentCol)
        mainLayout.addWidget(label7, 12, labelCol)
        mainLayout.addWidget(self.brushStyleComboBox, 12, contentCol)
        mainLayout.addWidget(label8, 14, labelCol)
        mainLayout.addWidget(self.brushColorFrame, 14, contentCol)
        mainLayout.addWidget(self.brushColorPushButton, 14, 3)
        mainSplitter1 = QSplitter(Qt.Horizontal)
        mainSplitter1.setOpaqueResize(True)

        stack1 = QStackedWidget()
        stack1.setFrameStyle(QFrame.Panel | QFrame.Raised)
        self.area = PaintArea()
        stack1.addWidget(self.area)
        frame1 = QFrame(mainSplitter1)
        mainLayout1 = QVBoxLayout(frame1)
        mainLayout1.setSpacing(6)
        mainLayout1.addWidget(stack1)

        layout = QGridLayout(self)
        layout.addWidget(mainSplitter1, 0, 0)
        layout.addWidget(mainSplitter, 0, 1)
        self.setLayout(layout)

        # 信号和槽函数
        self.shapeComboBox.activated.connect(self.slotShape)
        self.widthSpinBox.valueChanged.connect(self.slotPenWidth)
        self.penColorPushButton.clicked.connect(self.slotPenColor)
        self.penStyleComboBox.activated.connect(self.slotPenStyle)
        self.penCapComboBox.activated.connect(self.slotPenCap)
        self.penJoinComboBox.activated.connect(self.slotPenJoin)
        self.brushStyleComboBox.activated.connect(self.slotBrush)
        self.brushColorPushButton.clicked.connect(self.slotBrushColor)

        self.slotShape(self.shapeComboBox.currentIndex())
        self.slotPenWidth(self.widthSpinBox.value())
        self.slotBrush(self.brushStyleComboBox.currentIndex())

    def slotShape(self, value):
        shape = self.area.Shape[value]
        self.area.setShape(shape)

    def slotPenWidth(self, value):
        color = self.penColorFrame.palette().color(QPalette.Window)
        style = Qt.PenStyle(self.penStyleComboBox.itemData(self.penStyleComboBox.currentIndex(), Qt.UserRole))
        cap = Qt.PenCapStyle(self.penCapComboBox.itemData(self.penCapComboBox.currentIndex(), Qt.UserRole))
        join = Qt.PenJoinStyle(self.penJoinComboBox.itemData(self.penJoinComboBox.currentIndex(), Qt.UserRole))
        self.area.setPen(QPen(color, value, style, cap, join))

    def slotPenStyle(self, value):
        self.slotPenWidth(value)

    def slotPenCap(self, value):
        self.slotPenWidth(value)

    def slotPenJoin(self, value):
        self.slotPenWidth(value)

    def slotPenColor(self):
        color = QColorDialog.getColor(Qt.blue)
        self.penColorFrame.setPalette(QPalette(color))
        self.area.setPen(QPen(color))

    def slotBrushColor(self):
        color = QColorDialog.getColor(Qt.blue)
        self.brushColorFrame.setPalette(QPalette(color))
        self.slotBrush(self.brushStyleComboBox.currentIndex())

    def slotBrush(self, value):
        color = self.brushColorFrame.palette().color(QPalette.Window)
        style = Qt.BrushStyle(self.brushStyleComboBox.itemData(value, Qt.UserRole))

        if (style == Qt.LinearGradientPattern):
            linearGradient = QLinearGradient(0, 0, 400, 400)
            linearGradient.setColorAt(0.0, Qt.white)
            linearGradient.setColorAt(0.2, color)
            linearGradient.setColorAt(1.0, Qt.black)
            self.area.setBrush(linearGradient)
        elif style == Qt.RadialGradientPattern:
            radialGradient = QRadialGradient(200, 200, 80, 70, 70);
            radialGradient.setColorAt(0.0, Qt.white)
            radialGradient.setColorAt(0.2, Qt.green)
            radialGradient.setColorAt(1.0, Qt.black)
            self.area.setBrush(radialGradient)
        elif (style == Qt.ConicalGradientPattern):
            conicalGradient = QConicalGradient(200, 200, 30)
            conicalGradient.setColorAt(0.0, Qt.white)
            conicalGradient.setColorAt(0.2, color)
            conicalGradient.setColorAt(1.0, Qt.black)
            self.area.setBrush(conicalGradient)
        elif (style == Qt.TexturePattern):
            self.area.setBrush(QBrush(QPixmap("./Data/qt-logo.png")))
        else:
            self.area.setBrush(QBrush(color, style))


class PaintArea(QWidget):
    def __init__(self):
        super(PaintArea, self).__init__()
        self.Shape = ["Line", "Rectangle", 'Rounded Rectangle', "Ellipse", "Pie", 'Chord',
                      "Path", "Polygon", "Polyline", "Arc", "Points", "Text", "Pixmap"]
        self.setPalette(QPalette(Qt.white))
        self.setAutoFillBackground(True)
        self.setMinimumSize(500, 500)
        self.pen = QPen()
        self.brush = QBrush()

    def setShape(self, s):
        self.shape = s
        self.update()

    def setPen(self, p):
        self.pen = p
        self.update()

    def setBrush(self, b):
        self.brush = b
        self.update()

    def paintEvent(self, QPaintEvent):
        p = QPainter(self)
        p.setPen(self.pen)
        p.setBrush(self.brush)

        rect = QRect(50, 100, 300, 200)
        points = [QPoint(150, 100), QPoint(300, 150), QPoint(350, 250), QPoint(100, 300)]
        startAngle = 30 * 16
        spanAngle = 120 * 16

        if self.shape == "Line":
            p.drawLine(rect.topLeft(), rect.bottomRight())
        elif self.shape == "Rectangle":
            p.drawRect(rect)
        elif self.shape == 'Rounded Rectangle':
            p.drawRoundedRect(rect, 25, 25, Qt.RelativeSize)
        elif self.shape == "Ellipse":
            p.drawEllipse(rect)
        elif self.shape == "Polygon":
            p.drawPolygon(QPolygon(points), Qt.WindingFill)
        elif self.shape == "Polyline":
            p.drawPolyline(QPolygon(points))
        elif self.shape == "Points":
            p.drawPoints(QPolygon(points))
        elif self.shape == "Pie":
            p.drawPie(rect, startAngle, spanAngle)
        elif self.shape == "Arc":
            p.drawArc(rect, startAngle, spanAngle)
        elif self.shape == "Chord":
            p.drawChord(rect, startAngle, spanAngle)
        elif self.shape == "Path":
            path = QPainterPath()
            path.addRect(150, 150, 100, 100)
            path.moveTo(100, 100)
            path.cubicTo(300, 100, 200, 200, 300, 300)
            path.cubicTo(100, 300, 200, 200, 100, 100)
            p.drawPath(path)
        elif self.shape == "Text":
            p.drawText(rect, Qt.AlignCenter, "Hello Qt!")
        elif self.shape == "Pixmap":
            p.drawPixmap(150, 150, QPixmap("./Data/qt-logo.png"))


if __name__ == '__main__':
    app = QApplication(sys.argv)
    form = StockDialog()
    form.show()
    app.exec_()