华山资源网

PyQt5利用QPainter绘制各种图形的实例
脚本专栏 2024/11/17 佚名
3 1

这个例子我做了好几天：

1）官网C++的源码，改写成PyQt5版本的代码，好多细节不会转化

2）网上的PyQt的例子根本运行不了

填了无数个坑，结合二者，终于能完成了一个关于绘图的东西。这个过程也掌握了很多新的知识点

【知识点】

1、关于多个点的使用

poitns = [QPoint(10, 80), QPoint(20, 10), QPoint(80, 30), QPoint(90, 70)]

请看：

# 定义多个点
   points = [QPoint(10, 80), QPoint(20, 10), QPoint(80, 30), QPoint(90, 70)]

   # ===直接使用 points 会报错！=========
   # ...
   elif self.shape == self.Points:
      painter.drawPoints(points)

   elif self.shape == self.Polyline:
      painter.drawPolyline(points)

   elif self.shape == self.Polygon:
      painter.drawPolygon(points, 4)

   # ...

   # ===把 points 用 QPolygon()包裹起来才正确！=========
   # ...
   elif self.shape == self.Points:
      painter.drawPoints(QPolygon(points))

   elif self.shape == self.Polyline:
      painter.drawPolyline(QPolygon(points))

   elif self.shape == self.Polygon:
      painter.drawPolygon(QPolygon(points), 4)

   # ...

2、在QDialog窗体中显示QWidget部件

【效果图】

PyQt5利用QPainter绘制各种图形的实例PyQt5利用QPainter绘制各种图形的实例

【资源】

//img.jbzj.com/file_images/article/201710/brick.png
//img.jbzj.com/file_images/article/201710/qt-logo.png

【代码】

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_()

以上这篇PyQt5利用QPainter绘制各种图形的实例就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。

华山资源网 Design By www.eoogi.com
广告合作：本站广告合作请联系QQ：858582 申请时备注：广告合作（否则不回）
免责声明：本站资源来自互联网收集,仅供用于学习和交流,请遵循相关法律法规,本站一切资源不代表本站立场,如有侵权、后门、不妥请联系本站删除！
华山资源网 Design By www.eoogi.com
www.eoogi.com 华山资源网
120,135影音资源
344,641技术资源
22,817软件资源
435,032站长资源

《魔兽世界》大逃杀！60人新游玩模式《强袭风暴》3月21日上线

暴雪近日发布了《魔兽世界》10.2.6 更新内容，新游玩模式《强袭风暴》即将于3月21 日在亚服上线，届时玩家将前往阿拉希高地展开一场 60 人大逃杀对战。

艾泽拉斯的冒险者已经征服了艾泽拉斯的大地及遥远的彼岸。他们在对抗世界上最致命的敌人时展现出过人的手腕，并且成功阻止终结宇宙等级的威胁。当他们在为即将于《魔兽世界》资料片《地心之战》中来袭的萨拉塔斯势力做战斗准备时，他们还需要在熟悉的阿拉希高地面对一个全新的敌人──那就是彼此。在《巨龙崛起》10.2.6 更新的《强袭风暴》中，玩家将会进入一个全新的海盗主题大逃杀式限时活动，其中包含极高的风险和史诗级的奖励。

《强袭风暴》不是普通的战场，作为一个独立于主游戏之外的活动，玩家可以用大逃杀的风格来体验《魔兽世界》，不分职业、不分装备（除了你在赛局中捡到的），光是技巧和战略的强弱之分就能决定出谁才是能坚持到最后的赢家。本次活动将会开放单人和双人模式，玩家在加入海盗主题的预赛大厅区域前，可以从强袭风暴角色画面新增好友。游玩游戏将可以累计名望轨迹，《巨龙崛起》和《魔兽世界：巫妖王之怒 经典版》的玩家都可以获得奖励。

更新日志

友情链接

杰晶网络 DDR爱好者之家 桃源资源网 杰网资源 富贵资源网 南强小屋 铁雪资源网 幽灵资源网 万梅资源网 狼山资源网 白云岛资源网 昆仑资源网 相思资源网 明霞山资源网 内蒙古资源网 黑松山资源网 茶园资源网 饿虎岗资源网 大旗谷资源网 常春岛资源网 岱庙资源网 兴国资源网 快活林资源网 蝙蝠岛资源网 帝王谷资源网 白云城资源网 伏龙阁资源网 清风细雨楼 天枫庄资源网 圆月山庄资源网 无争山庄资源网 神水资源网 移花宫资源网 神剑山庄资源网 无为清净楼资源网 金钱帮资源网 丐帮资源网 华山资源网 极乐门资源网 小李飞刀资源网 凤求凰客栈 风云阁资源网 金狮镖局 鸳鸯亭资源网 千金楼资源网 更多链接
华山资源网 Design By www.eoogi.com