专栏首页Python编程 pyqt matplotlibPyQt5利用QPainter绘制各种图形[转发]

PyQt5利用QPainter绘制各种图形[转发]

传送点: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().__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(600,380)
        self.pen = QPen()
        self.brush = QBrush()       
    
    def setShape(self,s):
        self.shape = s
        self.update()#会调用paintEvent()
        
    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(50,100,500,200)
        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("ICON/smile.png"))
        
if __name__=='__main__':
    app = QApplication(sys.argv)
    form = StockDialog()
    form.show()
    app.exec_()

本文分享自微信公众号 - Python编程 pyqt matplotlib(wsplovePython),作者:罗兵の水库

原文出处及转载信息见文内详细说明,如有侵权,请联系 yunjia_community@tencent.com 删除。

原始发表时间:2019-04-22

本文参与腾讯云自媒体分享计划,欢迎正在阅读的你也加入,一起分享。

我来说两句

0 条评论
登录 后参与评论

相关文章

  • PyQt5 非模态对话框(apply 型)

    如果希望用户可以重复更改对话框中的参数并能马上看到修改结果,那么就要使用非模态对话框,这样用户就可以按照他们喜欢的方式来持续不断地修改数据并验证修改的结果了。

    用户6021899
  • 有限元一阶四面体单元python编程(二)

    用户6021899
  • 有限元平面四边形等差单元python编程

    四边形等参单元的刚度矩阵是二重积分式,我想用Maple求解析解,算了很久也没有算出结果。所有我的编程思路是先用 sympy 求出 单元刚度矩阵的符号解,再用la...

    用户6021899
  • PyQt 编程入门(六.3)

    from PyQt5.QtCore import QTimer from PyQt5.QtWidgets import * import sys

    用户6021899
  • 理解unittest测试框架(四)——执行模块

    前文讨论了很多关于用例组织相关的内容,这里看看unittest的执行模块。执行模块的内容不多,这里我们带着生成测试报告的HTMLTestRunner.py的逻辑...

    点点寒彬
  • python项目练习十:DIY街机游戏

    终于来到了最后一个项目,看看前面的那些练习,也算是熟悉了python的基本操作,也知道python能干哪些事情,最后一个项目相比于以前的稍微复杂些,但是任何一个...

    the5fire
  • DIY 雪花特效(一)

    首先我们需要雪花的图片,比如下面这张(其实这张有点不太真实,不过无妨,我只是拿它来做演示)。

    用户6021899
  • vn.py源码解读(一、环境配置与回测初试)

            近来忙于毕业找工作,也不知道能不能继续在量化界混了。周末比较闲,抽空研究了一下vn.py。有人说,为什么学那么多的回测平台呀。其实我个人觉得,做...

    钱塘小甲子
  • vn.py源码解读(四、主引擎代码分析----初始化函数)

            vnpy有一个叫做主引擎的东西,在三里面也说过,个人觉得这个应该是一个运行框架的东西,不应该叫做引擎,不过没关系,名字而已嘛。这一篇呢主要就是分...

    钱塘小甲子
  • vn.py源码解读(七、回测代码解析)

            原本想开始讲策略类的编写,后来觉得,结合回测代码其实能够更好的理解,所以先解读一下vnpy回测的代码吧,后续自己也想把vnpy回测的部分优化一下...

    钱塘小甲子

扫码关注云+社区

领取腾讯云代金券