PyQT5之QPainter
1.PyQT5图像2.PyQT5水平垂直布局3.PyQT5之图片左右翻页4.PyQT5之QPushButton和布局5.PyQT5之label6.PyQT5之选择图片7.PyQT5之自定义信号8.PyQT5之窗口9.PyQT5之菜单栏和工具栏10.PyQT5之QComboBox11.PyQT5之Checkbox12.PyQT5之QRadioButton13.PyQT5之单行文本输入到多行显示窗14.PyQT5之网格布局多图片显示15.PyQtGraph绘制折线图16.PyQT5之PyQtGraph实时数据显示17.PyQT5之窗口最大化最小化18.PyQT5之QSS基础/子控件选择器19.PyQT5样式设置20.PyQT5绘图21.PyQT5窗口样式设置22.PyQT5之设置窗口控件风格23.PyQT5之多窗口交互24.PyQT5之override覆盖槽函数25.PyQT5之为槽函数传递参数26.PyQT5信号与槽的连接27.PyQT5信号刷新时间28.PyQT5之信号关闭窗口29.信号与槽N对N30.PyQT5之多个信号31.PyQT5之QTreeView32.PyQT5内嵌html33.PyQT5加载本地web页面34.PyQT5之QWebEngineView35.PyQT5之QThread36.PyQT5之QTimer37.PyQT5之QStackedWidget38.PyQT5之QTreeWidget-QTabWidget39.PyQT5之QTableWidget40.PyQT5之QListWidget41.PyQT5之QListView42.PyQT5之二维表QTableView43.PyQT5打印机
44.PyQT5之QPainter
45.PyQT5之QFontDialog46.PyQT5之QInputDialog47.PyQT5之QMessageBox48.PyQT5之QDialog49.PyQT5之多页面切换50.PyQT5之计数器控件QSpinBox51.PyQT5之滑块控件QSlider52.PyQtGraph绘图参考53.PyQtGraph之多图绘制54.PyQtGraph之柱状图55.PyQt5选择文件控件QFileDialog参考https://www.cnblogs.com/jgg54335/p/14904853.html
实例一:
import sys
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtGui import QPainter, QColor, QFont
from PyQt5.QtCore import Qt
class Drawing(QWidget):
def __init__(self, parent=None):
super(Drawing, self).__init__(parent)
self.setWindowTitle('在窗口绘制文字')
self.resize(300, 200)
self.text = '欢迎学习 PyQt5'
def paintEvent(self, event):
painter = QPainter()
painter.begin(self)
# 自定义绘制方法
self.drawText(event, painter)
painter.end()
def drawText(self, event, qp):
# 设置画笔的颜色
qp.setPen(QColor(168, 34, 3))
# 设置字体
qp.setFont(QFont('SimSun', 20))
# 绘制文字
qp.drawText(event.rect(), Qt.AlignCenter, self.text)
if __name__ == '__main__':
app = QApplication(sys.argv)
demo = Drawing()
demo.show()
sys.exit(app.exec_())
实例二:
import sys, math
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
class Drawing(QWidget):
def __init__(self, parent=None):
super(Drawing, self).__init__(parent)
self.resize(300, 200)
self.setWindowTitle('在窗口画点')
def paintEvent(self, event):
# 初始化绘图工具
qp = QPainter()
# 开始在窗口绘制
qp.begin(self)
# 自定义画点方法
self.drawPoints(qp)
# 结束在窗口的绘制
qp.end()
def drawPoints(self, qp):
qp.setPen(Qt.red)
size = self.size()
for i in range(1000):
# 绘制郑玄函数图像,它的周期是【-100,100】
x = 100 * (-1 + 2.0 * i / 1000) + size.width() / 2.0
y = -50 * math.sin((x - size.width() / 2.0) * math.pi / 50) + size.height() / 2.0
qp.drawPoint(x, y)
if __name__ == '__main__':
app = QApplication(sys.argv)
demo = Drawing()
demo.show()
sys.exit(app.exec_())
实例三:
import sys, math
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
class Drawing(QWidget):
def __init__(self, parent=None):
super(Drawing, self).__init__(parent)
self.resize(300, 200)
self.setWindowTitle('在窗口画点')
def paintEvent(self, event):
# 初始化绘图工具
qp = QPainter()
# 开始在窗口绘制
qp.begin(self)
# 自定义画点方法
self.drawPoints(qp)
# 结束在窗口的绘制
qp.end()
def drawPoints(self, qp):
qp.setPen(Qt.red)
size = self.size()
for i in range(1000):
# 绘制郑玄函数图像,它的周期是【-100,100】
x = 100 * (-1 + 2.0 * i / 1000) + size.width() / 2.0
y = -50 * math.sin((x - size.width() / 2.0) * math.pi / 50) + size.height() / 2.0
qp.drawPoint(x, y)
if __name__ == '__main__':
app = QApplication(sys.argv)
demo = Drawing()
demo.show()
sys.exit(app.exec_())
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