PyQt5利用QPainter繪制各種圖形的實(shí)例
更新時(shí)間：2017年10月19日 09:50:36 作者：羅兵
下面小編就為大家?guī)硪黄狿yQt5利用QPainter繪制各種圖形的實(shí)例。小編覺得挺不錯(cuò)的，現(xiàn)在就分享給大家，也給大家做個(gè)參考。一起跟隨小編過來看看吧
這個(gè)例子我做了好幾天：
1）官網(wǎng)C++的源碼，改寫成PyQt5版本的代碼，好多細(xì)節(jié)不會(huì)轉(zhuǎn)化
2）網(wǎng)上的PyQt的例子根本運(yùn)行不了
填了無數(shù)個(gè)坑，結(jié)合二者，終于能完成了一個(gè)關(guān)于繪圖的東西。這個(gè)過程也掌握了很多新的知識(shí)點(diǎn)
【知識(shí)點(diǎn)】
1、關(guān)于多個(gè)點(diǎn)的使用
poitns = [QPoint(10, 80), QPoint(20, 10), QPoint(80, 30), QPoint(90, 70)]
請(qǐng)看：
# 定義多個(gè)點(diǎn)
points = [QPoint(10, 80), QPoint(20, 10), QPoint(80, 30), QPoint(90, 70)]
# ===直接使用 points 會(huì)報(bào)錯(cuò)！=========
# ...
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()包裹起來才正確！=========
# ...
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窗體中顯示QWidget部件
【效果圖】
【資源】
//img.jbzj.com/file_images/article/201710/brick.png
//img.jbzj.com/file_images/article/201710/qt-logo.png
【代碼】
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繪制各種圖形")
mainSplitter = QSplitter(Qt.Horizontal)
mainSplitter.setOpaqueResize(True)
frame = QFrame(mainSplitter)
mainLayout = QGridLayout(frame)
#mainLayout.setMargin(10)
mainLayout.setSpacing(6)
label1=QLabel("形狀：")
label2=QLabel("畫筆線寬：")
label3=QLabel("畫筆顏色：")
label4=QLabel("畫筆風(fēng)格：")
label5=QLabel("畫筆頂端：")
label6=QLabel("畫筆連接點(diǎn)：")
label7=QLabel("畫刷風(fēng)格：")
label8=QLabel("畫刷顏色：")
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)
#信號(hào)和槽函數(shù)
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_()
以上這篇PyQt5利用QPainter繪制各種圖形的實(shí)例就是小編分享給大家的全部內(nèi)容了，希望能給大家一個(gè)參考，也希望大家多多支持腳本之家。
相關(guān)文章
今天小編就為大家分享一篇淺談Python type的使用，具有很好的參考價(jià)值，希望對(duì)大家有所幫助。一起跟隨小編過來看看吧2019-11-11
解讀殘差網(wǎng)絡(luò)(Residual Network),殘差連接(skip-connect)
這篇文章主要介紹了殘差網(wǎng)絡(luò)(Residual Network),殘差連接(skip-connect),具有很好的參考價(jià)值,希望對(duì)大家有所幫助,如有錯(cuò)誤或未考慮完全的地方,望不吝賜教2023-08-08
這篇文章主要介紹了python將字典列表導(dǎo)出為Excel文件的方法，本文給大家介紹的非常詳細(xì)，具有一定的參考借鑒價(jià)值,需要的朋友可以參考下2019-09-09
大家好，本篇文章主要講的是python多線程互斥鎖與死鎖問題詳解，感興趣的同學(xué)趕快來看一看吧，對(duì)你有幫助的話記得收藏一下2022-01-01
這篇文章主要為大家詳細(xì)介紹了python實(shí)現(xiàn)樸素貝葉斯分類器，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下2018-03-03
Python實(shí)戰(zhàn)快速上手BeautifulSoup庫爬取專欄標(biāo)題和地址
BeautifulSoup是爬蟲必學(xué)的技能，BeautifulSoup最主要的功能是從網(wǎng)頁抓取數(shù)據(jù)，Beautiful Soup自動(dòng)將輸入文檔轉(zhuǎn)換為Unicode編碼，輸出文檔轉(zhuǎn)換為utf-8編碼2021-10-10
用Python實(shí)現(xiàn)zip密碼破解實(shí)例
大家好，本篇文章主要講的是用Python實(shí)現(xiàn)zip密碼破解實(shí)例，感興趣的同學(xué)趕快來看一看吧，對(duì)你有幫助的話記得收藏一下2022-01-01
python中68個(gè)內(nèi)置函數(shù)的總結(jié)與介紹
這篇文章主要介紹了python中68個(gè)內(nèi)置函數(shù)的總結(jié)與介紹,需要的朋友可以參考下2020-02-02
使用python+pygame開發(fā)消消樂游戲附完整源碼
消消樂小游戲相信大家都玩過，大人小孩都喜歡玩的一款小游戲，那么基于程序是如何實(shí)現(xiàn)的呢？今天帶大家，用python+pygame來實(shí)現(xiàn)一下這個(gè)花里胡哨的消消樂小游戲功能，感興趣的朋友一起看看吧2021-06-06
這篇文章主要介紹了django里面的forms模塊詳解的相關(guān)資料,需要的朋友可以參考下2023-11-11