02Qpainter绘图

'https://www.cnblogs.com/hhh5460/p/4273799.html' import sys from PyQt5.QtCore import * from PyQt5.QtGui import * from PyQt5.QtWidgets import * class StockDialog(QWidget): def __init__(self, parent=None): super(StockDialog, self).__init__(parent) self.setWindowTitle("利用QPainter绘制各种图形") mainSplitter = QSplitter(Qt.Horizontal) mainSplitter.setOpaqueResize(True) frame = QFrame(mainSplitter) mainLayout = QGridLayout(frame) # mainLayout.setMargin(10) 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.setMargin(10) 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("images/brick.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(400, 400) 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 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) 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": p.drawPath(path) elif self.shape == "Text": p.drawText(rect, Qt.AlignCenter, "Hello Qt!") elif self.shape == "Pixmap": p.drawPixmap(150, 150, QPixmap("images/qt-logo.png")) if __name__ == '__main__': app = QApplication(sys.argv) form = StockDialog() form.show() app.exec_()