python3+PyQt5图形项的自定义和交互 python3实现page Designer应用程序


Posted in Python onJuly 20, 2020

本文通过Python3+PyQt5实现《python Qt Gui 快速编程》这本书的page Designer应用程序,采用QGraphicsView,QGraphicsScene,QGraphicsItem,这个程序包含有多个文本,图片和框的页面。有些图形类在PyQt5已过时,所以本代码改动幅度比较大。主要的类或方法的改变如下:

QMatrix==>QTransform
setMatrix==>setTransform
rotate ==> setRotation

本例中,由于event.delta()已过时,还重写了wheelEvent方法:

def wheelEvent(self, event):
 #factor = 1.41 ** (-event.delta() / 240.0) 
 #factor = 1.41 ** (-abs(event.startX()-event.y()) / 240.0)
 factor = event.angleDelta().y()/120.0
 if event.angleDelta().y()/120.0 > 0:
  factor=2
 else:
  factor=0.5
 self.scale(factor, factor)

为了保持代码可读行,增加了一个类:

class GraphicsPixmapItem(QGraphicsPixmapItem): #add by yangrongdong
 def __init__(self,pixmap):
 super(QGraphicsPixmapItem, self).__init__(pixmap)

本例中还有包含菜单的按钮:

if text == "&Align":
 menu = QMenu(self)
 for text, arg in (
   ("Align &Left", Qt.AlignLeft),
   ("Align &Right", Qt.AlignRight),
   ("Align &Top", Qt.AlignTop),
   ("Align &Bottom", Qt.AlignBottom)):
   wrapper = functools.partial(self.setAlignment, arg)
   self.wrapped.append(wrapper)
   menu.addAction(text, wrapper)
  button.setMenu(menu)

本例中还针对QStyleOptionGraphicsItem.levelOfDetail已过时,改写如下:

option.levelOfDetailFromTransform(self.transform())

下面为完整的代码:

#!/usr/bin/env python3


import functools
import random
import sys
from PyQt5.QtCore import (QByteArray, QDataStream, QFile, QFileInfo,
    QIODevice, QPoint, QPointF, QRectF, Qt)
from PyQt5.QtWidgets import (QApplication, QDialog,
    QDialogButtonBox, QFileDialog, QFontComboBox,
    QGraphicsItem, QGraphicsPixmapItem,
    QGraphicsScene, QGraphicsTextItem, QGraphicsView, QGridLayout,
    QHBoxLayout, QLabel, QMenu, QMessageBox,QPushButton, QSpinBox,
    QStyle, QTextEdit, QVBoxLayout)
from PyQt5.QtGui import QFont,QCursor,QFontMetrics,QTransform,QPainter,QPen,QPixmap
from PyQt5.QtPrintSupport import QPrinter,QPrintDialog

MAC = True
try:
 from PyQt5.QtGui import qt_mac_set_native_menubar
except ImportError:
 MAC = False

#PageSize = (595, 842) # A4 in points
PageSize = (612, 792) # US Letter in points
PointSize = 10

MagicNumber = 0x70616765
FileVersion = 1

Dirty = False


class TextItemDlg(QDialog):

 def __init__(self, item=None, position=None, scene=None, parent=None):
 super(QDialog, self).__init__(parent)

 self.item = item
 self.position = position
 self.scene = scene

 self.editor = QTextEdit()
 self.editor.setAcceptRichText(False)
 self.editor.setTabChangesFocus(True)
 editorLabel = QLabel("&Text:")
 editorLabel.setBuddy(self.editor)
 self.fontComboBox = QFontComboBox()
 self.fontComboBox.setCurrentFont(QFont("Times", PointSize))
 fontLabel = QLabel("&Font:")
 fontLabel.setBuddy(self.fontComboBox)
 self.fontSpinBox = QSpinBox()
 self.fontSpinBox.setAlignment(Qt.AlignRight|Qt.AlignVCenter)
 self.fontSpinBox.setRange(6, 280)
 self.fontSpinBox.setValue(PointSize)
 fontSizeLabel = QLabel("&Size:")
 fontSizeLabel.setBuddy(self.fontSpinBox)
 self.buttonBox = QDialogButtonBox(QDialogButtonBox.Ok|
      QDialogButtonBox.Cancel)
 self.buttonBox.button(QDialogButtonBox.Ok).setEnabled(False)

 if self.item is not None:
  self.editor.setPlainText(self.item.toPlainText())
  self.fontComboBox.setCurrentFont(self.item.font())
  self.fontSpinBox.setValue(self.item.font().pointSize())

 layout = QGridLayout()
 layout.addWidget(editorLabel, 0, 0)
 layout.addWidget(self.editor, 1, 0, 1, 6)
 layout.addWidget(fontLabel, 2, 0)
 layout.addWidget(self.fontComboBox, 2, 1, 1, 2)
 layout.addWidget(fontSizeLabel, 2, 3)
 layout.addWidget(self.fontSpinBox, 2, 4, 1, 2)
 layout.addWidget(self.buttonBox, 3, 0, 1, 6)
 self.setLayout(layout)


 self.fontComboBox.currentFontChanged.connect(self.updateUi)
 self.fontSpinBox.valueChanged.connect(self.updateUi)
 self.editor.textChanged.connect(self.updateUi)
 self.buttonBox.accepted.connect(self.accept)
 self.buttonBox.rejected.connect(self.reject)

 self.setWindowTitle("Page Designer - {0} Text Item".format(
  "Add" if self.item is None else "Edit"))
 self.updateUi()


 def updateUi(self):
 font = self.fontComboBox.currentFont()
 font.setPointSize(self.fontSpinBox.value())
 self.editor.document().setDefaultFont(font)
 self.buttonBox.button(QDialogButtonBox.Ok).setEnabled(
  bool(self.editor.toPlainText()))


 def accept(self):
 if self.item is None:
  self.item = TextItem("", self.position, self.scene)
 font = self.fontComboBox.currentFont()
 font.setPointSize(self.fontSpinBox.value())
 self.item.setFont(font)
 self.item.setPlainText(self.editor.toPlainText()) 
 self.item.update()
 global Dirty
 Dirty = True
 QDialog.accept(self)


class TextItem(QGraphicsTextItem):
 def __init__(self, text, position, scene,
   font=QFont("Times", PointSize), matrix=QTransform()):
 super(TextItem, self).__init__(text)
 self.setFlags(QGraphicsItem.ItemIsSelectable|
   QGraphicsItem.ItemIsMovable)
 self.setFont(font)
 self.setPos(position)
 self.setTransform(matrix)
 scene.clearSelection()
 scene.addItem(self)
 self.setSelected(True)
 global Dirty
 Dirty = True


 def parentWidget(self):
 return self.scene().views()[0]


 def itemChange(self, change, variant):
 if change != QGraphicsItem.ItemSelectedChange:
  global Dirty
  Dirty = True
 return QGraphicsTextItem.itemChange(self, change, variant)


 def mouseDoubleClickEvent(self, event):
 dialog = TextItemDlg(self, self.parentWidget())
 dialog.exec_()



class GraphicsPixmapItem(QGraphicsPixmapItem): #add by yangrongdong
 def __init__(self,pixmap):
 super(QGraphicsPixmapItem, self).__init__(pixmap)


class BoxItem(QGraphicsItem):

 def __init__(self, position, scene, style=Qt.SolidLine,
   rect=None, matrix=QTransform()):
 super(BoxItem, self).__init__()
 self.setFlags(QGraphicsItem.ItemIsSelectable|
   QGraphicsItem.ItemIsMovable|
   QGraphicsItem.ItemIsFocusable)
 if rect is None:
  rect = QRectF(-10 * PointSize, -PointSize, 20 * PointSize,
    2 * PointSize)
 self.rect = rect
 self.style = style
 self.setPos(position)
 self.setTransform(matrix)
 scene.clearSelection()
 scene.addItem(self)
 self.setSelected(True)
 self.setFocus()
 global Dirty
 Dirty = True


 def parentWidget(self):
 return self.scene().views()[0]


 def boundingRect(self):
 return self.rect.adjusted(-2, -2, 2, 2)


 def paint(self, painter, option, widget):
 pen = QPen(self.style)
 pen.setColor(Qt.black)
 pen.setWidth(1)
 if option.state & QStyle.State_Selected:
  pen.setColor(Qt.blue)
 painter.setPen(pen)
 painter.drawRect(self.rect)


 def itemChange(self, change, variant):
 if change != QGraphicsItem.ItemSelectedChange:
  global Dirty
  Dirty = True
 return QGraphicsItem.itemChange(self, change, variant)


 def contextMenuEvent(self, event):
 wrapped = []
 menu = QMenu(self.parentWidget())
 for text, param in (
  ("&Solid", Qt.SolidLine),
  ("&Dashed", Qt.DashLine),
  ("D&otted", Qt.DotLine),
  ("D&ashDotted", Qt.DashDotLine),
  ("DashDo&tDotted", Qt.DashDotDotLine)):
  wrapper = functools.partial(self.setStyle, param)
  wrapped.append(wrapper)
  menu.addAction(text, wrapper)
 menu.exec_(event.screenPos())


 def setStyle(self, style):
 self.style = style
 self.update()
 global Dirty
 Dirty = True


 def keyPressEvent(self, event):
 factor = PointSize / 4
 changed = False
 if event.modifiers() & Qt.ShiftModifier:
  if event.key() == Qt.Key_Left:
  self.rect.setRight(self.rect.right() - factor)
  changed = True
  elif event.key() == Qt.Key_Right:
  self.rect.setRight(self.rect.right() + factor)
  changed = True
  elif event.key() == Qt.Key_Up:
  self.rect.setBottom(self.rect.bottom() - factor)
  changed = True
  elif event.key() == Qt.Key_Down:
  self.rect.setBottom(self.rect.bottom() + factor)
  changed = True
 if changed:
  self.update()
  global Dirty
  Dirty = True
 else:
  QGraphicsItem.keyPressEvent(self, event)


class GraphicsView(QGraphicsView):

 def __init__(self, parent=None):
 super(GraphicsView, self).__init__(parent)
 self.setDragMode(QGraphicsView.RubberBandDrag)
 self.setRenderHint(QPainter.Antialiasing)
 self.setRenderHint(QPainter.TextAntialiasing)


 def wheelEvent(self, event):
 #factor = 1.41 ** (-event.delta() / 240.0) 
 factor = event.angleDelta().y()/120.0
 if event.angleDelta().y()/120.0 > 0:
  factor=2
 else:
  factor=0.5
 self.scale(factor, factor)


class MainForm(QDialog):

 def __init__(self, parent=None):
 super(MainForm, self).__init__(parent)

 self.filename = ""
 self.copiedItem = QByteArray()
 self.pasteOffset = 5
 self.prevPoint = QPoint()
 self.addOffset = 5
 self.borders = []

 self.printer = QPrinter(QPrinter.HighResolution)
 self.printer.setPageSize(QPrinter.Letter)

 self.view = GraphicsView()
 self.scene = QGraphicsScene(self)
 self.scene.setSceneRect(0, 0, PageSize[0], PageSize[1])
 self.addBorders()
 self.view.setScene(self.scene)

 self.wrapped = [] # Needed to keep wrappers alive
 buttonLayout = QVBoxLayout()
 for text, slot in (
  ("Add &Text", self.addText),
  ("Add &Box", self.addBox),
  ("Add Pi&xmap", self.addPixmap),
  ("&Align", None),
  ("&Copy", self.copy),
  ("C&ut", self.cut),
  ("&Paste", self.paste),
  ("&Delete...", self.delete),
  ("&Rotate", self.rotate),
  ("Pri&nt...", self.print_),
  ("&Open...", self.open),
  ("&Save", self.save),
  ("&Quit", self.accept)):
  button = QPushButton(text)
  if not MAC:
  button.setFocusPolicy(Qt.NoFocus)
  if slot is not None:
  button.clicked.connect(slot)
  if text == "&Align":
  menu = QMenu(self)
  for text, arg in (
   ("Align &Left", Qt.AlignLeft),
   ("Align &Right", Qt.AlignRight),
   ("Align &Top", Qt.AlignTop),
   ("Align &Bottom", Qt.AlignBottom)):
   wrapper = functools.partial(self.setAlignment, arg)
   self.wrapped.append(wrapper)
   menu.addAction(text, wrapper)
  button.setMenu(menu)
  if text == "Pri&nt...":
  buttonLayout.addStretch(5)
  if text == "&Quit":
  buttonLayout.addStretch(1)
  buttonLayout.addWidget(button)
 buttonLayout.addStretch()

 layout = QHBoxLayout()
 layout.addWidget(self.view, 1)
 layout.addLayout(buttonLayout)
 self.setLayout(layout)

 fm = QFontMetrics(self.font())
 self.resize(self.scene.width() + fm.width(" Delete... ") + 50,
   self.scene.height() + 50)
 self.setWindowTitle("Page Designer")


 def addBorders(self):
 self.borders = []
 rect = QRectF(0, 0, PageSize[0], PageSize[1])
 self.borders.append(self.scene.addRect(rect, Qt.yellow))
 margin = 5.25 * PointSize
 self.borders.append(self.scene.addRect(
  rect.adjusted(margin, margin, -margin, -margin),
  Qt.yellow))


 def removeBorders(self):
 while self.borders:
  item = self.borders.pop()
  self.scene.removeItem(item)
  del item


 def reject(self):
 self.accept()


 def accept(self):
 self.offerSave()
 QDialog.accept(self)


 def offerSave(self):
 if (Dirty and QMessageBox.question(self,
    "Page Designer - Unsaved Changes",
    "Save unsaved changes?",
    QMessageBox.Yes|QMessageBox.No) == 
  QMessageBox.Yes):
  self.save()


 def position(self):
 point = self.mapFromGlobal(QCursor.pos())
 if not self.view.geometry().contains(point):
  coord = random.randint(36, 144)
  point = QPoint(coord, coord)
 else:
  if point == self.prevPoint:
  point += QPoint(self.addOffset, self.addOffset)
  self.addOffset += 5
  else:
  self.addOffset = 5
  self.prevPoint = point
 return self.view.mapToScene(point)


 def addText(self):
 dialog = TextItemDlg(position=self.position(),
    scene=self.scene, parent=self)
 dialog.exec_()


 def addBox(self):
 BoxItem(self.position(), self.scene)


 def addPixmap(self):
 path = (QFileInfo(self.filename).path()
  if self.filename else ".")
 fname,filetype = QFileDialog.getOpenFileName(self,
  "Page Designer - Add Pixmap", path,
  "Pixmap Files (*.bmp *.jpg *.png *.xpm)")
 if not fname:
  return
 self.createPixmapItem(QPixmap(fname), self.position())


 def createPixmapItem(self, pixmap, position, matrix=QTransform()):
 item = GraphicsPixmapItem(pixmap)
 item.setFlags(QGraphicsItem.ItemIsSelectable|
   QGraphicsItem.ItemIsMovable)
 item.setPos(position)
 item.setTransform(matrix)
 self.scene.clearSelection()
 self.scene.addItem(item)
 item.setSelected(True)
 global Dirty
 Dirty = True
 return item


 def selectedItem(self):
 items = self.scene.selectedItems()
 if len(items) == 1:
  return items[0]
 return None


 def copy(self):
 item = self.selectedItem()
 if item is None:
  return
 self.copiedItem.clear()
 self.pasteOffset = 5
 stream = QDataStream(self.copiedItem, QIODevice.WriteOnly)
 self.writeItemToStream(stream, item)


 def cut(self):
 item = self.selectedItem()
 if item is None:
  return
 self.copy()
 self.scene.removeItem(item)
 del item


 def paste(self):
 if self.copiedItem.isEmpty():
  return
 stream = QDataStream(self.copiedItem, QIODevice.ReadOnly)
 self.readItemFromStream(stream, self.pasteOffset)
 self.pasteOffset += 5


 def setAlignment(self, alignment):
 # Items are returned in arbitrary order
 items = self.scene.selectedItems()
 if len(items) <= 1:
  return
 # Gather coordinate data
 leftXs, rightXs, topYs, bottomYs = [], [], [], []
 for item in items:
  rect = item.sceneBoundingRect()
  leftXs.append(rect.x())
  rightXs.append(rect.x() + rect.width())
  topYs.append(rect.y())
  bottomYs.append(rect.y() + rect.height())
 # Perform alignment
 if alignment == Qt.AlignLeft:
  xAlignment = min(leftXs)
  for i, item in enumerate(items):
  item.moveBy(xAlignment - leftXs[i], 0)
 elif alignment == Qt.AlignRight:
  xAlignment = max(rightXs)
  for i, item in enumerate(items):
  item.moveBy(xAlignment - rightXs[i], 0)
 elif alignment == Qt.AlignTop:
  yAlignment = min(topYs)
  for i, item in enumerate(items):
  item.moveBy(0, yAlignment - topYs[i])
 elif alignment == Qt.AlignBottom:
  yAlignment = max(bottomYs)
  for i, item in enumerate(items):
  item.moveBy(0, yAlignment - bottomYs[i])
 global Dirty
 Dirty = True


 def rotate(self):
 for item in self.scene.selectedItems():
  item.setRotation(item.rotation()+30)

 def delete(self):
 items = self.scene.selectedItems()
 if (len(items) and QMessageBox.question(self,
  "Page Designer - Delete",
  "Delete {0} item{1}?".format(len(items),
  "s" if len(items) != 1 else ""),
  QMessageBox.Yes|QMessageBox.No) ==
  QMessageBox.Yes):
  while items:
  item = items.pop()
  self.scene.removeItem(item)
  del item
  global Dirty
  Dirty = True


 def print_(self):
 dialog = QPrintDialog(self.printer)
 if dialog.exec_():
  painter = QPainter(self.printer)
  painter.setRenderHint(QPainter.Antialiasing)
  painter.setRenderHint(QPainter.TextAntialiasing)
  self.scene.clearSelection()
  self.removeBorders()
  self.scene.render(painter)
  self.addBorders()


 def open(self):
 self.offerSave()
 path = (QFileInfo(self.filename).path()
  if self.filename else ".")
 fname,filetype = QFileDialog.getOpenFileName(self,
  "Page Designer - Open", path,
  "Page Designer Files (*.pgd)")
 if not fname:
  return
 self.filename = fname
 fh = None
 try:
  fh = QFile(self.filename)
  if not fh.open(QIODevice.ReadOnly):
  raise IOError(str(fh.errorString()))
  items = self.scene.items()
  while items:
  item = items.pop()
  self.scene.removeItem(item)
  del item
  self.addBorders()
  stream = QDataStream(fh)
  stream.setVersion(QDataStream.Qt_5_7)
  magic = stream.readInt32()
  if magic != MagicNumber:
  raise IOError("not a valid .pgd file")
  fileVersion = stream.readInt16()
  if fileVersion != FileVersion:
  raise IOError("unrecognised .pgd file version")
  while not fh.atEnd():
  self.readItemFromStream(stream)
 except IOError as e:
  QMessageBox.warning(self, "Page Designer -- Open Error",
   "Failed to open {0}: {1}".format(self.filename, e))
 finally:
  if fh is not None:
  fh.close()
 global Dirty
 Dirty = False


 def save(self):
 if not self.filename:
  path = "."
  fname,filetype = QFileDialog.getSaveFileName(self,
   "Page Designer - Save As", path,
   "Page Designer Files (*.pgd)")
  if not fname:
  return
  self.filename = fname
 fh = None
 try:
  fh = QFile(self.filename)
  if not fh.open(QIODevice.WriteOnly):
  raise IOError(str(fh.errorString()))
  self.scene.clearSelection()
  stream = QDataStream(fh)
  stream.setVersion(QDataStream.Qt_5_7)
  stream.writeInt32(MagicNumber)
  stream.writeInt16(FileVersion)
  for item in self.scene.items():
  self.writeItemToStream(stream, item)
 except IOError as e:
  QMessageBox.warning(self, "Page Designer -- Save Error",
   "Failed to save {0}: {1}".format(self.filename, e))
 finally:
  if fh is not None:
  fh.close()
 global Dirty
 Dirty = False


 def readItemFromStream(self, stream, offset=0):
 type = ""
 position = QPointF()
 matrix = QTransform()
 rotateangle=0#add by yangrongdong
 type=stream.readQString()
 stream >> position >> matrix
 if offset:
  position += QPointF(offset, offset)
 if type == "Text":
  text = ""
  font = QFont()
  text=stream.readQString()
  stream >> font
  rotateangle=stream.readFloat()
  tx=TextItem(text, position, self.scene, font, matrix)
  tx.setRotation(rotateangle)
 elif type == "Box":
  rect = QRectF()
  stream >> rect
  style = Qt.PenStyle(stream.readInt16())
  rotateangle=stream.readFloat()
  bx=BoxItem(position, self.scene, style, rect, matrix)
  bx.setRotation(rotateangle)
 elif type == "Pixmap":
  pixmap = QPixmap()
  stream >> pixmap
  rotateangle=stream.readFloat()
  px=self.createPixmapItem(pixmap, position, matrix)
  px.setRotation(rotateangle)


 def writeItemToStream(self, stream, item):
 if isinstance(item, TextItem):
  stream.writeQString("Text")
  stream<<item.pos()<< item.transform() 
  stream.writeQString(item.toPlainText())
  stream<< item.font()
  stream.writeFloat(item.rotation())#add by yangrongdong
 elif isinstance(item, GraphicsPixmapItem):
  stream.writeQString("Pixmap")
  stream << item.pos() << item.transform() << item.pixmap()
  stream.writeFloat(item.rotation())#add by yangrongdong
 elif isinstance(item, BoxItem):
  stream.writeQString("Box")
  stream<< item.pos() << item.transform() << item.rect
  stream.writeInt16(item.style)
  stream.writeFloat(item.rotation())#add by yangrongdong



app = QApplication(sys.argv)
form = MainForm()
rect = QApplication.desktop().availableGeometry()
form.resize(int(rect.width() * 0.6), int(rect.height() * 0.9))
form.show()
app.exec_()

运行结果

python3+PyQt5图形项的自定义和交互 python3实现page Designer应用程序

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持三水点靠木。

Python 相关文章推荐
python实现360皮肤按钮控件示例
Feb 21 Python
Python随机生成信用卡卡号的实现方法
May 14 Python
Python自定义类的数组排序实现代码
Aug 28 Python
python GUI实例学习
Nov 21 Python
python使用tornado实现简单爬虫
Jul 28 Python
python opencv 简单阈值算法的实现
Aug 04 Python
python3使用Pillow、tesseract-ocr与pytesseract模块的图片识别的方法
Feb 26 Python
在pytorch中动态调整优化器的学习率方式
Jun 24 Python
Python 中如何使用 virtualenv 管理虚拟环境
Jan 21 Python
python中sys模块的介绍与实例
Apr 17 Python
python本地文件服务器实例教程
May 02 Python
Python的property属性详细讲解
Apr 11 Python
Python查找两个有序列表中位数的方法【基于归并算法】
Apr 20 #Python
pandas 使用apply同时处理两列数据的方法
Apr 20 #Python
Python之pandas读写文件乱码的解决方法
Apr 20 #Python
python3+PyQt5实现自定义窗口部件Counters
Apr 20 #Python
Python cookbook(字符串与文本)在字符串的开头或结尾处进行文本匹配操作
Apr 20 #Python
python3+PyQt5实现支持多线程的页面索引器应用程序
Apr 20 #Python
python3+PyQt5+Qt Designer实现扩展对话框
Apr 20 #Python
You might like
十天学会php之第一天
2006/10/09 PHP
优化PHP程序的方法小结
2012/02/23 PHP
解析php开发中的中文编码问题
2013/08/08 PHP
windwos下使用php连接oracle数据库的过程分享
2014/05/26 PHP
php实现有趣的人品测试程序实例
2015/06/08 PHP
PHP ADODB实现事务处理功能示例
2018/05/25 PHP
JavaScript 实现模态对话框 源代码大全
2009/05/02 Javascript
锋利的jQuery 要点归纳(三) jQuery中的事件和动画(上:事件篇)
2010/03/24 Javascript
JavaScript 高级篇之DOM文档,简单封装及调用、动态添加、删除样式(六)
2012/04/07 Javascript
jquery 实现上下滚动效果示例代码
2013/08/09 Javascript
ExtJS中设置下拉列表框不可编辑的方法
2014/05/07 Javascript
AngularJs动态加载模块和依赖注入详解
2016/01/11 Javascript
浅析javascript函数表达式
2016/02/10 Javascript
js带闹铃功能的倒计时代码
2016/09/29 Javascript
BootStrap tooltip提示框使用小结
2016/10/26 Javascript
ionic中的$ionicPlatform.ready事件中的通用设置
2017/06/11 Javascript
详解如何构建Angular项目目录结构
2017/07/13 Javascript
微信小程序自定义带价格显示日历效果
2018/12/29 Javascript
vue项目中常见问题及解决方案(推荐)
2019/10/21 Javascript
JavaScript实现点击图片换背景
2020/11/20 Javascript
详解vite+ts快速搭建vue3项目以及介绍相关特性
2021/02/25 Vue.js
[49:20]VG vs TNC Supermajor小组赛B组败者组决赛 BO3 第二场 6.2
2018/06/03 DOTA
python基于ID3思想的决策树
2018/01/03 Python
python-docx修改已存在的Word文档的表格的字体格式方法
2018/05/08 Python
python如何保证输入键入数字的方法
2019/08/23 Python
详解pyinstaller selenium python3 chrome打包问题
2019/10/18 Python
Python Pandas 对列/行进行选择,增加,删除操作
2020/05/17 Python
flask框架中的cookie和session使用
2021/01/31 Python
Crocs卡骆驰洞洞鞋日本官方网站:Crocs日本
2016/08/25 全球购物
工程力学硕士生的自我评价范文
2013/11/16 职场文书
银行员工犯错检讨书
2014/09/16 职场文书
2014年房产经纪人工作总结
2014/12/08 职场文书
大学学生会主席竞选稿
2015/11/19 职场文书
民政局2016年“六一”儿童节慰问活动总结
2016/04/06 职场文书
在MySQL中你成功的避开了所有索引
2022/04/20 MySQL
MySQL数据库实验之 触发器和存储过程
2022/06/21 MySQL