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PyQt5案例汇总(完整版)
起步
PyQt5是一套绑定Qt5的应用程序框架。他在Python 2.x和3.x中都是可用的。该教程使用的是Python3.x。
Qt库是一套最有用的GUI库。
PyQt5是作为一套Python模块实现的。他已经超过620个类和6000个函数与方法。他是一个运行在所有主… 个人博客点这里
PyQt5案例汇总(完整版)
起步
PyQt5是一套绑定Qt5的应用程序框架。他在Python 2.x和3.x中都是可用的。该教程使用的是Python3.x。
Qt库是一套最有用的GUI库。
PyQt5是作为一套Python模块实现的。他已经超过620个类和6000个函数与方法。他是一个运行在所有主流操作系统上的多平台组件包括Unix,Windows和Mac OS。
说明
下面小编就给大家提供一些简单的pyqt5的案例,如有需要拿走不谢!!!
本文转载from:PyQt5-Chinese-tutorial
菜单栏和工具栏
01窗口居中 # 导入需要的包和模块
import sys
from PyQt5.QtWidgets import QWidget
from PyQt5.QtWidgets import QDesktopWidget
# QDesktopWidget这个库提供了用户的桌面信息,包括屏幕的大小
from PyQt5.QtWidgets import QApplication# 创建一个类
class Ex(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.resize(250,150)self.center()# 这个方法调用我们下面写的,实现对话框居中的方法self.setWindowTitle(chuangkou要居中)self.show()def center(self):qr self.frameGeometry()# 得到了主窗口大小print(qr:,qr)cp QDesktopWidget().availableGeometry().center()# 获取显示器的分辨率,然后得到中间点的位置print(cp:,cp)qr.moveCenter(cp)# 然后把自己的窗口的中心点放到qr的中心点self.move(qr.topLeft())app QApplication(sys.argv)
demo1 Ex()
sys.exit(app.exec_())02 状态栏 # 导入需要的包和模块
import sys
# from PyQt5.QtWidgets import QWidget
# from PyQt5.QtWidgets import QDesktopWidget
# QDesktopWidget这个库提供了用户的桌面信息,包括屏幕的大小
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QMainWindowclass Ex(QMainWindow):def __init__(self):super().__init__()self.initUI()def initUI(self):# 状态栏是由这个创建的self.statusBar().showMessage(准备)# 调用QtGui.QMainWindow 类的 statusBar()方法#3 创建状态栏.第一次调用创建一个状态栏,返回一个状态栏对象.#3 showMessage()方法在状态栏上显示一条信息self.setGeometry(300,300,250,150)self.setWindowTitle(标题还是要取的)#显示self.show()app QApplication(sys.argv)
demo1 Ex()
sys.exit(app.exec_())
03菜单栏 import sys
from PyQt5.QtWidgets import QMainWindow
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QAction
from PyQt5.QtWidgets import qApp
from PyQt5.QtGui import QIconclass Ex(QMainWindow):def __init__(self):super(Ex, self).__init__()self.initUI()def initUI(self):exitAct QAction(QIcon(exit.png),Exit,self)print(exitAct)exitAct.setShortcut(ctrlq)exitAct.setStatusTip(tuichu应用)exitAct.triggered.connect(qApp.quit)self.statusBar()menubar self.menuBar()fileMenu menubar.addMenu(File)fileMenu.addAction(exitAct)self.setGeometry(300,300,399,200)self.setWindowTitle(决赛你电脑的)self.show()app QApplication(sys.argv)
demo1 Ex()
sys.exit(app.exec_())
04子菜单 import sys
from PyQt5.QtWidgets import QMainWindow, QAction, QMenu, QApplicationclass Example(QMainWindow):def __init__(self):super().__init__()self.initUI()def initUI(self):menubar self.menuBar()fileMenu menubar.addMenu(File)impMenu QMenu(Import, self)impAct QAction(Import mail, self)impMenu.addAction(impAct)newAct QAction(New, self)fileMenu.addAction(newAct)fileMenu.addMenu(impMenu)self.setGeometry(300, 300, 300, 200)self.setWindowTitle(Submenu)self.show()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())05 勾选菜单 import sys
from PyQt5.QtWidgets import QMainWindow, QAction, QApplicationclass Example(QMainWindow):def __init__(self):super().__init__()self.initUI()def initUI(self):self.statusbar self.statusBar()self.statusbar.showMessage(Ready)menubar self.menuBar()viewMenu menubar.addMenu(View)# 本例创建了一个行为菜单。这个行为动作能切换状态栏显示或者隐藏。viewStatAct QAction(View statusbar, self, checkableTrue)viewStatAct.setStatusTip(View statusbar) # 用checkable选项创建一个能选中的菜单。viewStatAct.setChecked(True) # 默认设置为选中状态viewStatAct.triggered.connect(self.toggleMenu)viewMenu.addAction(viewStatAct)# 依据选中状态切换状态栏的显示与否。self.setGeometry(300, 300, 300, 200)self.setWindowTitle(Check menu)self.show()def toggleMenu(self, state):if state:self.statusbar.show()else:self.statusbar.hide()app QApplication(sys.argv)
demo1 Example()
sys.exit(app.exec_())06 右键菜单 import sys
from PyQt5.QtWidgets import QMainWindow, qApp, QMenu, QApplicationclass Example(QMainWindow):def __init__(self):super().__init__()self.initUI()def initUI(self):self.setGeometry(300, 300, 300, 200)self.setWindowTitle(Context menu)self.show()def contextMenuEvent(self, event):cmenu QMenu(self)newAct cmenu.addAction(New)print(newAct)opnAct cmenu.addAction(Open)print(opnAct)quitAct cmenu.addAction(Quit)action cmenu.exec_(self.mapToGlobal(event.pos()))if action quitAct:qApp.quit()elif action opnAct:print(打开就打开)elif action newAct:print(新建就新建)app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())07工具栏 # 菜单栏包含了所有的命令工具栏就是常用的命令的集合。import sys
from PyQt5.QtWidgets import QMainWindow, QAction, qApp, QApplication
from PyQt5.QtGui import QIconclass Example(QMainWindow):def __init__(self):super().__init__()self.initUI()def initUI(self):exitAct QAction(QIcon(logo.png), Exit, self)exitAct.setShortcut(CtrlQ)exitAct.triggered.connect(qApp.quit)# 和上面的菜单栏差不多这里使用了一个行为对象# 这个对象绑定了一个标签一个图标和一个快捷键。# 这些行为被触发的时候会调用QtGui.QMainWindow的quit方法退出应用。self.toolbar self.addToolBar(Exit)self.toolbar.addAction(exitAct)self.setGeometry(300, 300, 300, 200)self.setWindowTitle(Toolbar)self.show()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())
# 上面的例子中我们创建了一个工具栏这个工具栏只有一个退出应用的动作
08主窗口(啥都有的呢) # 本模块的功能:
import sys
from PyQt5.QtWidgets import QMainWindow
from PyQt5.QtWidgets import QTextEdit
from PyQt5.QtWidgets import QAction
from PyQt5.QtWidgets import QApplication
from PyQt5.QtGui import QIconclass Example(QMainWindow):def __init__(self):super().__init__()self.initUI()def initUI(self):textEdit QTextEdit()self.setCentralWidget(textEdit)exitAct QAction(QIcon(logo.png), 退退退, self)exitAct.setShortcut(CtrlQ)exitAct.setStatusTip(退出应用)exitAct.triggered.connect(self.close)self.statusBar()menubar self.menuBar()fileMenu menubar.addMenu(文件)fileMenu.addAction(exitAct)toolbar self.addToolBar(退出)toolbar.addAction(exitAct)self.setGeometry(300, 300, 350, 250)self.setWindowTitle(代码编辑工具)self.show()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())布局管理
09绝对定位的应用 import sys
from PyQt5.QtWidgets import QWidget, QLabel, QApplicationclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):lbl1 QLabel(Zetcode, self)lbl1.move(15, 10)lbl2 QLabel(tutorials, self)lbl2.move(35, 40)lbl3 QLabel(for programmers, self)lbl3.move(55, 70)self.setGeometry(300, 300, 250, 150)self.setWindowTitle(Absolute)self.show()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())# 绝对定位其实说白了就是使用相对于原点的像素来进行计算10 盒子布局 import sys
from PyQt5.QtWidgets import (QWidget, QPushButton,QHBoxLayout, QVBoxLayout, QApplication)class Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):okButton QPushButton(OK)cancelButton QPushButton(Cancel)hbox QHBoxLayout()hbox.addStretch(1)hbox.addWidget(okButton)hbox.addWidget(cancelButton)vbox QVBoxLayout()vbox.addStretch(1)vbox.addLayout(hbox)self.setLayout(vbox)self.setGeometry(300, 300, 300, 150)self.setWindowTitle(Buttons)self.show()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())11 栅格布局(表格) import sys
from PyQt5.QtWidgets import (QWidget, QGridLayout,QPushButton, QApplication)class Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):grid QGridLayout()self.setLayout(grid)names [Cls, Bck, , Close,7, 8, 9, /,4, 5, 6, *,1, 2, 3, -,0, ., , ]positions [(i,j) for i in range(5) for j in range(4)]for position, name in zip(positions, names):if name :continuebutton QPushButton(name)grid.addWidget(button, *position)self.move(300, 150)self.setWindowTitle(Calculator)self.show()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())12 制作提交反馈信息的布局 import sys
from PyQt5.QtWidgets import \(QWidget, QLabel, QLineEdit, QTextEdit, QGridLayout, QApplication)class Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):title QLabel(Title)author QLabel(Author)review QLabel(Review)titleEdit QLineEdit()authorEdit QLineEdit()reviewEdit QTextEdit()grid QGridLayout()grid.setSpacing(10)grid.addWidget(title, 1, 0)grid.addWidget(titleEdit, 1, 1)grid.addWidget(author, 2, 0)grid.addWidget(authorEdit, 2, 1)grid.addWidget(review, 3, 0)grid.addWidget(reviewEdit, 3, 1, 5, 1)self.setLayout(grid)self.setGeometry(300, 300, 350, 300)self.setWindowTitle(Review)self.show()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())事件和信号
13 信号和槽机制 事件
signals and slots 被其他人翻译成信号和槽机制(⊙o⊙)…我这里还是不翻译好了。
所有的应用都是事件驱动的。事件大部分都是由用户的行为产生的当然也有其他的事件产生方式
比如网络的连接窗口管理器或者定时器等。调用应用的exec_()方法时应用会进入主循环主循环会监听和分发事件。
在事件模型中有三个角色
事件源
事件
事件目标
事件源就是发生了状态改变的对象。事件是这个对象状态改变的内容。
事件目标是事件想作用的目标。事件源绑定事件处理函数然后作用于事件目标身上。
PyQt5处理事件方面有个signal and slot机制。Signals and slots用于对象间的通讯。
事件触发的时候发生一个signalslot是用来被Python调用的
相当于一个句柄这个词也好恶心就是相当于事件的绑定函数slot只有在事件触发的时候才能调用。
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import \(QWidget, QLCDNumber, QSlider, QVBoxLayout, QApplication)class Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):lcd QLCDNumber(self)print(lcd:,lcd)sld QSlider(Qt.Horizontal, self)print(sld,sld)vbox QVBoxLayout()print(vbox)vbox.addWidget(lcd)vbox.addWidget(sld)self.setLayout(vbox)print(lcd.display)sld.valueChanged.connect(lcd.display)self.setGeometry(300, 300, 250, 150)self.setWindowTitle(信号和槽机制的)self.show()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())14 重构事件处理器 import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QWidget, QApplicationclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.setGeometry(300, 300, 250, 150)self.setWindowTitle(事件的手)self.show()def keyPressEvent(self, e):if e.key() Qt.Key_Escape:self.close()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())15 事件对像 import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QWidget, QApplication, QGridLayout, QLabelclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):grid QGridLayout()grid.setSpacing(10)x 0y 0self.text x: {0}, y: {1}.format(x, y)self.label QLabel(self.text, self)grid.addWidget(self.label, 0, 0, Qt.AlignTop)self.setMouseTracking(True)self.setLayout(grid)self.setGeometry(300, 300, 350, 200)self.setWindowTitle(Event object)self.show()def mouseMoveEvent(self, e):x e.x()y e.y()text x: {0}, y: {1}.format(x, y)self.label.setText(text)app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())16事件发送 import sys
from PyQt5.QtWidgets import QMainWindow, QPushButton, QApplicationclass Example(QMainWindow):def __init__(self):super().__init__()self.initUI()def initUI(self):btn1 QPushButton(按钮老大, self)btn1.move(30, 50)btn2 QPushButton(按钮老二, self)btn2.move(150, 50)btn1.clicked.connect(self.buttonClicked)btn2.clicked.connect(self.buttonClicked)self.statusBar()self.setGeometry(300, 300, 290, 150)self.setWindowTitle(事件发送)self.show()def buttonClicked(self):sender self.sender()self.statusBar().showMessage(sender.text() 被按那儿了)app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())17 信号发送 import sys
from PyQt5.QtCore import pyqtSignal, QObject
from PyQt5.QtWidgets import QMainWindow, QApplicationclass Communicate(QObject):closeApp pyqtSignal()class Example(QMainWindow):def __init__(self):super().__init__()self.initUI()def initUI(self):self.c Communicate()self.c.closeApp.connect(self.close)self.setGeometry(300, 300, 290, 150)self.setWindowTitle(Emit signal)self.show()def mousePressEvent(self, event):self.c.closeApp.emit()if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())对话框
18 对话框(能够输入文字呦呦) from PyQt5.QtWidgets import (QWidget, QPushButton, QLineEdit,QInputDialog, QApplication)
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.btn QPushButton(Dialog, self)self.btn.move(20, 20)self.btn.clicked.connect(self.showDialog)self.le QLineEdit(self)self.le.move(130, 22)self.setGeometry(300, 300, 290, 150)self.setWindowTitle(Input dialog)self.show()def showDialog(self):text, ok QInputDialog.getText(self, Input Dialog,Enter your name:)if ok:self.le.setText(str(text))print(text哈哈)app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())19 选取颜色(NB坏了) # 本模块的功能:QColorDialog提供颜色的选择
# TODO 这个厉害,直接调用系统的颜色选择框
# TODO 强,实在是强
from PyQt5.QtWidgets import (QWidget, QPushButton, QFrame,QColorDialog, QApplication)
from PyQt5.QtGui import QColor
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):col QColor(0, 0, 0)self.btn QPushButton(Dialog, self)self.btn.move(20, 20)self.btn.clicked.connect(self.showDialog)self.frm QFrame(self)self.frm.setStyleSheet(QWidget { background-color: %s }% col.name())self.frm.setGeometry(130, 22, 100, 100)self.setGeometry(300, 300, 250, 180)self.setWindowTitle(Color dialog)self.show()def showDialog(self):col QColorDialog.getColor()if col.isValid():self.frm.setStyleSheet(QWidget { background-color: %s }% col.name())app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())
加油,都看到一半了你!!! ┌─┐ ┌─┐ ┌──┘ ┴───────┘ ┴──┐│ ││ ─── │ ███████───███████ ││ ││ ─┴─ ││ │└───┐ ┌───┘│ ││ │ │ ││ └──────────────┐│ ││ ├─┐│ ┌─┘│ │└─┐ ┐ ┌───────┬──┐ ┌──┘ │ ─┤ ─┤ │ ─┤ ─┤└──┴──┘ └──┴──┘ 神兽保佑代码无BUG!
20 选择字体 from PyQt5.QtWidgets import (QWidget, QVBoxLayout, QPushButton,QSizePolicy, QLabel, QFontDialog, QApplication)
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):vbox QVBoxLayout()btn QPushButton(来来来, self)btn.setSizePolicy(QSizePolicy.Fixed,QSizePolicy.Fixed)btn.move(20, 20)vbox.addWidget(btn)btn.clicked.connect(self.showDialog)self.lbl QLabel(Knowledge only matters, self)self.lbl.move(130, 20)vbox.addWidget(self.lbl)self.setLayout(vbox)self.setGeometry(300, 300, 250, 180)self.setWindowTitle(字体目录)self.show()def showDialog(self):font, ok QFontDialog.getFont()if ok:self.lbl.setFont(font)print(选择的字体是,end)print(font)print(type(font))app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())21 选择文件 from PyQt5.QtWidgets import \(QMainWindow, QTextEdit, QAction, QFileDialog, QApplication)
from PyQt5.QtGui import QIcon
import sysclass Example(QMainWindow):def __init__(self):super().__init__()self.initUI()def initUI(self):self.textEdit QTextEdit()self.setCentralWidget(self.textEdit)self.statusBar()openFile QAction(QIcon(images/open.png), Open, self)openFile.setShortcut(CtrlO)openFile.setStatusTip(打开一个新的文件)openFile.triggered.connect(self.showDialog)menubar self.menuBar()fileMenu menubar.addMenu(文件)fileMenu.addAction(openFile)self.setGeometry(300, 300, 350, 300)self.setWindowTitle(File dialog)self.show()def showDialog(self):fname QFileDialog.getOpenFileName(self, Open file, /home)if fname[0]:f open(fname[0], r)with f:data f.read()self.textEdit.setText(data)print(data)
app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())控件
22 QCheckBox是啥玩意 from PyQt5.QtWidgets import QWidget, QCheckBox, QApplication
from PyQt5.QtCore import Qt
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):cb QCheckBox(改改改, self)cb.move(20, 20)cb.toggle()cb.stateChanged.connect(self.changeTitle)self.setGeometry(300, 300, 250, 150)self.setWindowTitle(真正的标题)self.show()def changeTitle(self, state):if state Qt.Checked:self.setWindowTitle(假装有标题)else:self.setWindowTitle(没了)app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())23 切换按钮 from PyQt5.QtWidgets import (QWidget, QPushButton,QFrame, QApplication)
from PyQt5.QtGui import QColor
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.col QColor(0, 0, 0)redb QPushButton(Red, self)redb.setCheckable(True)redb.move(10, 10)redb.clicked[bool].connect(self.setColor)greenb QPushButton(Green, self)greenb.setCheckable(True)greenb.move(10, 60)greenb.clicked[bool].connect(self.setColor)blueb QPushButton(Blue, self)blueb.setCheckable(True)blueb.move(10, 110)blueb.clicked[bool].connect(self.setColor)self.square QFrame(self)self.square.setGeometry(150, 20, 100, 100)self.square.setStyleSheet(QWidget { background-color: %s } %self.col.name())self.setGeometry(300, 300, 280, 170)self.setWindowTitle(Toggle button)self.show()def setColor(self, pressed):source self.sender()if pressed:val 255else:val 0if source.text() Red:self.col.setRed(val)elif source.text() Green:self.col.setGreen(val)else:self.col.setBlue(val)self.square.setStyleSheet(QFrame { background-color: %s } %self.col.name())if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())24 滑块是个好东西 from PyQt5.QtWidgets import (QWidget, QSlider,QLabel, QApplication)
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPixmap
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):sld QSlider(Qt.Horizontal, self)sld.setFocusPolicy(Qt.NoFocus)sld.setGeometry(30, 40, 100, 30)sld.valueChanged[int].connect(self.changeValue)self.label QLabel(self)self.label.setPixmap(QPixmap(images/logo.png))self.label.setGeometry(160, 40, 80, 30)self.setGeometry(300, 300, 280, 170)self.setWindowTitle(s什么鸡儿玩意r)self.show()def changeValue(self, value):if value 0:self.label.setPixmap(QPixmap(images/1.png))elif value 0 and value 30:self.label.setPixmap(QPixmap(images/2.png))elif value 30 and value 80:self.label.setPixmap(QPixmap(images/3.png))else:self.label.setPixmap(QPixmap(images/4.png))app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())
25 进度条 from PyQt5.QtWidgets import (QWidget, QProgressBar,QPushButton, QApplication)
from PyQt5.QtCore import QBasicTimer
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.pbar QProgressBar(self)self.pbar.setGeometry(30, 40, 200, 25)self.btn QPushButton(走你, self)self.btn.move(40, 80)self.btn.clicked.connect(self.doAction)self.timer QBasicTimer()self.step 0self.setGeometry(300, 300, 280, 170)self.setWindowTitle(进度条就比较强了)self.show()def timerEvent(self, e):if self.step 200:self.timer.stop()self.btn.setText(完成吧)returnself.step self.step 1self.pbar.setValue(self.step)def doAction(self):if self.timer.isActive():self.timer.stop()self.btn.setText(走走走)else:self.timer.start(200, self)self.btn.setText(停,呗走了)if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())26 日历 from PyQt5.QtWidgets import (QWidget, QCalendarWidget,QLabel, QApplication, QVBoxLayout)
from PyQt5.QtCore import QDate
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):vbox QVBoxLayout(self)cal QCalendarWidget(self)cal.setGridVisible(True)cal.clicked[QDate].connect(self.showDate)vbox.addWidget(cal)self.lbl QLabel(self)date cal.selectedDate()self.lbl.setText(date.toString())vbox.addWidget(self.lbl)self.setLayout(vbox)self.setGeometry(300, 300, 350, 300)self.setWindowTitle(看日历认准我)self.show()def showDate(self, date):self.lbl.setText(date.toString())if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())27 图片 from PyQt5.QtWidgets import (QWidget, QHBoxLayout,QLabel, QApplication)
from PyQt5.QtGui import QPixmap
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):hbox QHBoxLayout(self)pixmap QPixmap(images/09f04)lbl QLabel(self)lbl.setPixmap(pixmap)hbox.addWidget(lbl)self.setLayout(hbox)self.move(300, 200)self.setWindowTitle(Red Rock)self.show()if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())28行编辑 import sys
from PyQt5.QtWidgets import \(QWidget, QLabel, QLineEdit, QApplication)class Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.lbl QLabel(self)qle QLineEdit(self)qle.move(60, 100)self.lbl.move(60, 40)qle.textChanged[str].connect(self.onChanged)self.setGeometry(300, 300, 280, 170)self.setWindowTitle(QLineEdit)self.show()def onChanged(self, text):self.lbl.setText(text)self.lbl.adjustSize()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())29 QSplitter是啥玩意呢? from PyQt5.QtWidgets import (QWidget, QHBoxLayout, QFrame,QSplitter, QStyleFactory, QApplication)
from PyQt5.QtCore import Qt
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):hbox QHBoxLayout(self)topleft QFrame(self)topleft.setFrameShape(QFrame.StyledPanel)topright QFrame(self)topright.setFrameShape(QFrame.StyledPanel)bottom QFrame(self)bottom.setFrameShape(QFrame.StyledPanel)splitter1 QSplitter(Qt.Horizontal)splitter1.addWidget(topleft)splitter1.addWidget(topright)splitter2 QSplitter(Qt.Vertical)splitter2.addWidget(splitter1)splitter2.addWidget(bottom)hbox.addWidget(splitter2)self.setLayout(hbox)self.setGeometry(300, 300, 400, 300)self.setWindowTitle(QSplitter)self.show()def onChanged(self, text):self.lbl.setText(text)self.lbl.adjustSize()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())
30 下拉选框 from PyQt5.QtWidgets import (QWidget, QLabel,QComboBox, QApplication)
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.lbl QLabel(Ubuntu, self)combo QComboBox(self)combo.addItem(Ubuntu)combo.addItem(Windows)combo.addItem(centos)combo.addItem(deepin)combo.addItem(redhat)combo.addItem(debain)combo.move(50, 50)self.lbl.move(50, 150)combo.activated[str].connect(self.onActivated)self.setGeometry(300, 300, 300, 200)self.setWindowTitle(下拉选框练习 )self.show()def onActivated(self, text):self.lbl.setText(text)self.lbl.adjustSize()app QApplication(sys.argv)
ex Example()
sys.exit(app.exec_())拖拽
31 简单的拖放
from PyQt5.QtWidgets import (QPushButton, QWidget,QLineEdit, QApplication)
import sysclass Button(QPushButton):def __init__(self, title, parent):super().__init__(title, parent)self.setAcceptDrops(True)def dragEnterEvent(self, e):if e.mimeData().hasFormat(text/plain):e.accept()else:e.ignore()def dropEvent(self, e):self.setText(e.mimeData().text())class Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):edit QLineEdit(, self)edit.setDragEnabled(True)edit.move(30, 65)button Button(Button, self)button.move(190, 65)self.setWindowTitle(Simple drag and drop)self.setGeometry(300, 300, 300, 150)if __name__ __main__:app QApplication(sys.argv)ex Example()ex.show()app.exec_()32 拖放按钮组件 from PyQt5.QtWidgets import QPushButton, QWidget, QApplication
from PyQt5.QtCore import Qt, QMimeData
from PyQt5.QtGui import QDrag
import sysclass Button(QPushButton):def __init__(self, title, parent):super().__init__(title, parent)def mouseMoveEvent(self, e):if e.buttons() ! Qt.RightButton:returnmimeData QMimeData()drag QDrag(self)drag.setMimeData(mimeData)drag.setHotSpot(e.pos() - self.rect().topLeft())dropAction drag.exec_(Qt.MoveAction)def mousePressEvent(self, e):super().mousePressEvent(e)if e.button() Qt.LeftButton:print(按我嘎哈)class Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.setAcceptDrops(True)self.button Button(来吧, self)self.button.move(100, 65)self.setWindowTitle(点击还能挪)self.setGeometry(300, 300, 280, 150)def dragEnterEvent(self, e):e.accept()def dropEvent(self, e):position e.pos()self.button.move(position)e.setDropAction(Qt.MoveAction)e.accept()if __name__ __main__:app QApplication(sys.argv)ex Example()ex.show()app.exec_()拖拽
在GUI里拖放是指用户点击一个虚拟的对象拖动然后放置到另外一个对象上面的动作。
一般情况下需要调用很多动作和方法创建很多变量。
拖放能让用户很直观的操作很复杂的逻辑。
一般情况下我们可以拖放两种东西数据和图形界面。
把一个图像从一个应用拖放到另外一个应用上的实质是操作二进制数据。
把一个表格从Firefox上拖放到另外一个位置 的实质是操作一个图形组。绘图
33 文本的涂鸦(这个好玩哈) import sys
from PyQt5.QtWidgets import QWidget, QApplication
from PyQt5.QtGui import QPainter, QColor, QFont
from PyQt5.QtCore import Qtclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.text 涂鸦要涂的有灵魂self.setGeometry(300, 300, 280, 170)self.setWindowTitle(绘画板)self.show()def paintEvent(self, event):qp QPainter()qp.begin(self)self.drawText(event, qp,168, 34, 243)qp.end()# qp1 QPainter()# qp1.begin(self)# self.drawText(event, qp1,168, 34, 23)# qp1.end()def drawText(self, event, qp, r,g,b):qp.setPen(QColor(r,g,b))qp.setFont(QFont(微软雅黑, 15))qp.drawText(event.rect(), Qt.AlignCenter, self.text)if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())34 点的绘画 from PyQt5.QtWidgets import QWidget, QApplication
from PyQt5.QtGui import QPainter
from PyQt5.QtCore import Qt
import sys, randomclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.setGeometry(300, 300, 300, 190)self.setWindowTitle(一大堆点点儿)self.show()def paintEvent(self, e):qp QPainter()qp.begin(self)self.drawPoints(qp)qp.end()def drawPoints(self, qp):qp.setPen(Qt.red)size self.size()for i in range(1000):x random.randint(1, size.width()-1)y random.randint(1, size.height()-1)qp.drawPoint(x, y)if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())35 颜色 from PyQt5.QtWidgets import QWidget, QApplication
from PyQt5.QtGui import QPainter, QColor, QBrush
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.setGeometry(300, 300, 350, 100)self.setWindowTitle(Colours)self.show()def paintEvent(self, e):qp QPainter()qp.begin(self)self.drawRectangles(qp)qp.end()def drawRectangles(self, qp):col QColor(0, 0, 0)col.setNamedColor(#d4d4d4)qp.setPen(col)qp.setBrush(QColor(200, 0, 0))qp.drawRect(10, 15, 90, 60)qp.setBrush(QColor(255, 80, 0, 160))qp.drawRect(130, 15, 90, 60)qp.setBrush(QColor(25, 0, 90, 200))qp.drawRect(250, 15, 90, 60)if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())36 QPen是笔么 from PyQt5.QtWidgets import QWidget, QApplication
from PyQt5.QtGui import QPainter, QPen
from PyQt5.QtCore import Qt
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.setGeometry(300, 300, 280, 270)self.setWindowTitle(Pen styles)self.show()def paintEvent(self, e):qp QPainter()qp.begin(self)self.drawLines(qp)qp.end()def drawLines(self, qp):pen QPen(Qt.black, 2, Qt.SolidLine)qp.setPen(pen)qp.drawLine(20, 40, 250, 40)pen.setStyle(Qt.DashLine)qp.setPen(pen)qp.drawLine(20, 80, 250, 80)pen.setStyle(Qt.DashDotLine)qp.setPen(pen)qp.drawLine(20, 120, 250, 120)pen.setStyle(Qt.DotLine)qp.setPen(pen)qp.drawLine(20, 160, 250, 160)pen.setStyle(Qt.DashDotDotLine)qp.setPen(pen)qp.drawLine(20, 200, 250, 200)pen.setStyle(Qt.CustomDashLine)pen.setDashPattern([1, 4, 5, 4])qp.setPen(pen)qp.drawLine(20, 240, 250, 240)if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())37 QBrush是啥? from PyQt5.QtWidgets import QWidget, QApplication
from PyQt5.QtGui import QPainter, QBrush
from PyQt5.QtCore import Qt
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.setGeometry(300, 300, 355, 280)self.setWindowTitle(Brushes)self.show()def paintEvent(self, e):qp QPainter()qp.begin(self)self.drawBrushes(qp)qp.end()def drawBrushes(self, qp):brush QBrush(Qt.SolidPattern)qp.setBrush(brush)qp.drawRect(10, 15, 90, 60)brush.setStyle(Qt.Dense1Pattern)qp.setBrush(brush)qp.drawRect(130, 15, 90, 60)brush.setStyle(Qt.Dense2Pattern)qp.setBrush(brush)qp.drawRect(250, 15, 90, 60)brush.setStyle(Qt.DiagCrossPattern)qp.setBrush(brush)qp.drawRect(10, 105, 90, 60)brush.setStyle(Qt.Dense5Pattern)qp.setBrush(brush)qp.drawRect(130, 105, 90, 60)brush.setStyle(Qt.Dense6Pattern)qp.setBrush(brush)qp.drawRect(250, 105, 90, 60)brush.setStyle(Qt.HorPattern)qp.setBrush(brush)qp.drawRect(10, 195, 90, 60)brush.setStyle(Qt.VerPattern)qp.setBrush(brush)qp.drawRect(130, 195, 90, 60)brush.setStyle(Qt.BDiagPattern)qp.setBrush(brush)qp.drawRect(250, 195, 90, 60)if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())38 贝赛尔曲线(这个学过PS的都知道) from PyQt5.QtWidgets import QWidget, QApplication
from PyQt5.QtGui import QPainter, QPainterPath
from PyQt5.QtCore import Qt
import sysclass Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):# 用QPainterPath路径创建贝塞尔曲线。# 使用cubicTo()方法生成分别需要三个点起始点控制点和终止点。self.setGeometry(300, 300, 380, 250)self.setWindowTitle(绘制贝塞尔曲线)self.show()def paintEvent(self, e):qp QPainter()qp.begin(self)qp.setRenderHint(QPainter.Antialiasing)self.drawBezierCurve(qp)qp.end()def drawBezierCurve(self, qp):path QPainterPath()path.moveTo(30, 30)path.cubicTo(30, 30, 350, 30, 200, 150)qp.drawPath(path)if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())
自定义组件
39 from PyQt5.QtWidgets import (QWidget, QSlider, QApplication,QHBoxLayout, QVBoxLayout)
from PyQt5.QtCore import QObject, Qt, pyqtSignal
from PyQt5.QtGui import QPainter, QFont, QColor, QPen
import sysclass Communicate(QObject):updateBW pyqtSignal(int)class BurningWidget(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):self.setMinimumSize(1, 30)self.value 75self.num [75, 150, 225, 300, 375, 450, 525, 600, 675]def setValue(self, value):self.value valuedef paintEvent(self, e):qp QPainter()qp.begin(self)self.drawWidget(qp)qp.end()def drawWidget(self, qp):MAX_CAPACITY 700OVER_CAPACITY 750font QFont(Serif, 7, QFont.Light)qp.setFont(font)size self.size()w size.width()h size.height()step int(round(w / 10))till int(((w / OVER_CAPACITY) * self.value))full int(((w / OVER_CAPACITY) * MAX_CAPACITY))if self.value MAX_CAPACITY:qp.setPen(QColor(255, 255, 255))qp.setBrush(QColor(255, 255, 184))qp.drawRect(0, 0, full, h)qp.setPen(QColor(255, 175, 175))qp.setBrush(QColor(255, 175, 175))qp.drawRect(full, 0, till-full, h)else:qp.setPen(QColor(255, 255, 255))qp.setBrush(QColor(255, 255, 184))qp.drawRect(0, 0, till, h)pen QPen(QColor(20, 20, 20), 1,Qt.SolidLine)qp.setPen(pen)qp.setBrush(Qt.NoBrush)qp.drawRect(0, 0, w-1, h-1)j 0for i in range(step, 10*step, step):qp.drawLine(i, 0, i, 5)metrics qp.fontMetrics()fw metrics.width(str(self.num[j]))qp.drawText(i-fw/2, h/2, str(self.num[j]))j j 1class Example(QWidget):def __init__(self):super().__init__()self.initUI()def initUI(self):OVER_CAPACITY 750sld QSlider(Qt.Horizontal, self)sld.setFocusPolicy(Qt.NoFocus)sld.setRange(1, OVER_CAPACITY)sld.setValue(75)sld.setGeometry(30, 40, 150, 30)self.c Communicate()self.wid BurningWidget()self.c.updateBW[int].connect(self.wid.setValue)sld.valueChanged[int].connect(self.changeValue)hbox QHBoxLayout()hbox.addWidget(self.wid)vbox QVBoxLayout()vbox.addStretch(1)vbox.addLayout(hbox)self.setLayout(vbox)self.setGeometry(300, 300, 390, 210)self.setWindowTitle(Burning widget)self.show()def changeValue(self, value):self.c.updateBW.emit(value)self.wid.repaint()if __name__ __main__:app QApplication(sys.argv)ex Example()sys.exit(app.exec_())终于翻到底部了,能看到这里,给你自己一个奖励吧!!! ┌─┐ ┌─┐ ┌──┘ ┴───────┘ ┴──┐│ ││ ─── │ ███████───███████ ││ ││ ─┴─ ││ │└───┐ ┌───┘│ ││ │ │ ││ └──────────────┐│ ││ ├─┐│ ┌─┘│ │└─┐ ┐ ┌───────┬──┐ ┌──┘ │ ─┤ ─┤ │ ─┤ ─┤└──┴──┘ └──┴──┘ 神兽保佑代码无BUG!
