PyQt5的学习之路(八)

像素图

#! /usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QHBoxLayout, QLabel
from PyQt5.QtGui import QPixmap, QPainter
from PyQt5.QtCore import Qt


class Myform(QWidget):

def __init__(self):

        super(Myform, self).__init__()

        self.initUI()

def initUI(self):

        hbox = QHBoxLayout(self)
        self.pixmap = QPixmap('1.jpg')

        lbl = QLabel(self)
        lbl.setPixmap(self.pixmap)    # 设置标签内容图片

        hbox.addWidget(lbl)
        self.setLayout(hbox)

        self.move(300, 300)
        self.resize(1000, 1000)
        self.setWindowTitle('pixmap')
        self.show()

def paintEvent(self, QPaintEvent):

        painter = QPainter(self)
        painter.translate(600, 100)     # 将(600, 100)设为新图的原点
# 后四位参素是从图片的(80, 100)位置截取横300,纵100像素的图片,并根据前四位参数对像素图的大小位置设置
        painter.rotate(150)    # 顺时针旋转150度
        painter.scale(2, 2)    # 横纵坐标放大两倍(原点位置不变)
        painter.drawPixmap(0, 0, 300, 200, self.pixmap, 80, 100, 300, 100)
        painter.translate(100, 100)

if __name__ == '__main__':

    app = QApplication(sys.argv)
    w = Myform()
    sys.exit(app.exec_())

单行文本框

#! /usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLineEdit, QLabel


class Myform(QWidget):

def __init__(self):

        super(Myform, self).__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, 300, 200)
        self.setWindowTitle('lineedit')
        self.show()

def onChanged(self, text):

        self.lbl.setText(text)
        self.lbl.adjustSize()   # 将标签设为自适应大小

if __name__ == '__main__':

    app = QApplication(sys.argv)
    w = Myform()
    sys.exit(app.exec_())

剪切器

#! /usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QSplitter, QFrame, QHBoxLayout, QStyleFactory
from PyQt5.QtCore import Qt


class Myform(QWidget):

def __init__(self):

        super(Myform, self).__init__()

        self.initUI()

def initUI(self):

        hbox = QHBoxLayout(self)

        topleft = QFrame(self)
        topleft.setFrameShape(QFrame.StyledPanel)   # 框架样式

        topright = QFrame(self)
        topright.setFrameShape(QFrame.StyledPanel)

        bottom = QFrame(self)
        bottom.setFrameShape(QFrame.StyledPanel)

        splitter1 = QSplitter(Qt.Vertical)    # 垂直方向的
        splitter1.addWidget(topleft)
        splitter1.addWidget(topright)

        splitter2 = QSplitter(Qt.Horizontal)     # 水平方向的(默认情况)
        splitter2.addWidget(splitter1)
        splitter2.addWidget(bottom)

        hbox.addWidget(splitter2)
        self.setLayout(hbox)

        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('splitter')
        self.show()



if __name__ == '__main__':

    app = QApplication(sys.argv)
    w = Myform()
    sys.exit(app.exec_())

下拉选单

#! /usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QComboBox


class Myform(QWidget):

def __init__(self):

        super(Myform, self).__init__()

        self.initUI()

def initUI(self):

        self.lbl = QLabel("Ubuntu", self)

        combo = QComboBox(self)
        combo.addItem("Ubuntu")
        combo.addItem("Mandrive")
        combo.addItem("Fedora")
        combo.addItem("Arch")
        combo.addItem("Gentoo")

        combo.move(50, 50)
        self.lbl.move(50, 150)

        combo.activated[str].connect(self.onActivated)

        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('combobox')
        self.show()

def onActivated(self, text):

        self.lbl.setText(text)
        self.lbl.adjustSize()

if __name__ == '__main__':

    app = QApplication(sys.argv)
    w = Myform()
    sys.exit(app.exec_())