打印图像-自写打印方法
1 import sys
2 from PyQt5.QtCore import Qt, QPoint, QRect
3 from PyQt5.QtGui import QPainter, QPixmap, QIcon
4 from PyQt5.QtPrintSupport import QPrintDialog, QPrinter
5 from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QHBoxLayout, QVBoxLayout
6
7 class Demo(QWidget):
8 def __init__(self):
9 super(Demo, self).__init__()
10 self.resize(600, 600)
11
12 self.begin_point = QPoint()
13 self.end_point = QPoint()
14
15 self.pix = QPixmap(600, 600)
16 self.pix.fill(Qt.white)
17
18 self.printer = QPrinter() #实例化打印对象
19
20 self.print_btn = QPushButton(self)
21 self.print_btn.setIcon(QIcon(r'C:\Users\ming\Desktop\2.png'))
22 self.print_btn.clicked.connect(self.open_printer_func)
23 #点击打印按钮进入打印设置函数
24
25 self.h_layout = QHBoxLayout()
26 self.v_layout = QVBoxLayout()
27 self.h_layout.addWidget(self.print_btn)
28 self.h_layout.addStretch(1)
29 self.v_layout.addLayout(self.h_layout)
30 self.v_layout.addStretch(1)
31
32 self.setLayout(self.v_layout)
33
34 def open_printer_func(self):#打印设置函数
35 printer_dialog = QPrintDialog(self.printer) #实例化一个打印设置对话框。
36 #参数 打印对象
37 if printer_dialog.exec_(): #以模态方式打开 打印设置对话框
38 painter = QPainter(self.printer) #把打印对象作为画布
39 painter.drawPixmap(0, 0, self.pix)#把需要打印的图像添加到画布[也是添加到打印对象上]
40
41 def paintEvent(self, QPaintEvent):
42 painter = QPainter(self)
43 painter.drawPixmap(0, 0, self.pix)
44
45 if self.begin_point and self.end_point:
46 rect = QRect(self.begin_point, self.end_point)
47 painter.drawRect(rect)
48
49 def mousePressEvent(self, QMouseEvent):
50 if QMouseEvent.button() == Qt.LeftButton:
51 self.begin_point = QMouseEvent.pos()
52 self.end_point = self.begin_point
53 self.update()
54
55 def mouseMoveEvent(self, QMouseEvent):
56 if QMouseEvent.buttons() == Qt.LeftButton:
57 self.end_point = QMouseEvent.pos()
58 self.update()
59
60 def mouseReleaseEvent(self, QMouseEvent):
61 if QMouseEvent.button() == Qt.LeftButton:
62 painter = QPainter(self.pix)
63 rect = QRect(self.begin_point, self.end_point)
64 painter.drawRect(rect)
65 self.begin_point = self.end_point = QPoint()
66 self.update()
67
68
69 if __name__ == '__main__':
70 app = QApplication(sys.argv)
71 demo = Demo()
72 demo.show()
73 sys.exit(app.exec_())
打印文本-控件自带打印方法
1 import sys
2 from PyQt5.QtPrintSupport import QPrintDialog, QPrinter
3 from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QTextEdit, QVBoxLayout
4
5 class Demo(QWidget):
6 def __init__(self):
7 super(Demo, self).__init__()
8 self.text_edit = QTextEdit(self)
9 self.print_btn = QPushButton('打印', self)
10 self.print_btn.clicked.connect(self.open_printer_func)
11
12 self.printer = QPrinter() #实例化一个打印对象
13
14 self.v_layout = QVBoxLayout()
15 self.v_layout.addWidget(self.text_edit)
16 self.v_layout.addWidget(self.print_btn)
17 self.setLayout(self.v_layout)
18
19 def open_printer_func(self):
20 printer_dialog = QPrintDialog(self.printer) #实例化一个打印设置对话框
21 # 参数 打印对象
22 if printer_dialog.exec_():#以模态方式打开 打印设置对话框
23 self.text_edit.print(self.printer)#把打印对象传给控件的print方法
24
25 if __name__ == '__main__':
26 app = QApplication(sys.argv)
27 demo = Demo()
28 demo.show()
29 sys.exit(app.exec_())
