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Pyqt 屏幕截图工具

从Pyqt的examples中看到一段截图代码，（路径：examplasdesktopscreenshot.py）
所以想自己UI下界面，手动练习下

通过UI生成的： Screenshot.py

 1 # -*- coding: utf-8 -*-
 2 
 3 # Form implementation generated from reading ui file 'Screenshot.ui'
 4 #
 5 # Created: Mon Mar 30 11:41:46 2015
 6 #      by: PyQt4 UI code generator 4.10.3
 7 #
 8 # WARNING! All changes made in this file will be lost!
 9 
10 from PyQt4 import QtCore, QtGui
11 
12 try:
13     _fromUtf8 = QtCore.QString.fromUtf8
14 except AttributeError:
15     def _fromUtf8(s):
16         return s
17 
18 try:
19     _encoding = QtGui.QApplication.UnicodeUTF8
20     def _translate(context, text, disambig):
21         return QtGui.QApplication.translate(context, text, disambig, _encoding)
22 except AttributeError:
23     def _translate(context, text, disambig):
24         return QtGui.QApplication.translate(context, text, disambig)
25 
26 class Ui_ScrShot(object):
27     def setupUi(self, ScrShot):
28         ScrShot.setObjectName(_fromUtf8("ScrShot"))
29         ScrShot.resize(270, 270)
30         self.verticalLayout = QtGui.QVBoxLayout(ScrShot)
31         self.verticalLayout.setObjectName(_fromUtf8("verticalLayout"))
32         self.labelShow = QtGui.QLabel(ScrShot)
33         sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
34         sizePolicy.setHorizontalStretch(0)
35         sizePolicy.setVerticalStretch(0)
36         sizePolicy.setHeightForWidth(self.labelShow.sizePolicy().hasHeightForWidth())
37         self.labelShow.setSizePolicy(sizePolicy)
38         self.labelShow.setText(_fromUtf8(""))
39         self.labelShow.setObjectName(_fromUtf8("labelShow"))
40         self.verticalLayout.addWidget(self.labelShow)
41         self.groupBox = QtGui.QGroupBox(ScrShot)
42         self.groupBox.setObjectName(_fromUtf8("groupBox"))
43         self.verticalLayout_2 = QtGui.QVBoxLayout(self.groupBox)
44         self.verticalLayout_2.setObjectName(_fromUtf8("verticalLayout_2"))
45         self.horizontalLayout_2 = QtGui.QHBoxLayout()
46         self.horizontalLayout_2.setObjectName(_fromUtf8("horizontalLayout_2"))
47         self.labelSpinBox = QtGui.QLabel(self.groupBox)
48         self.labelSpinBox.setObjectName(_fromUtf8("labelSpinBox"))
49         self.horizontalLayout_2.addWidget(self.labelSpinBox)
50         self.spinBox = QtGui.QSpinBox(self.groupBox)
51         self.spinBox.setObjectName(_fromUtf8("spinBox"))
52         self.horizontalLayout_2.addWidget(self.spinBox)
53         self.verticalLayout_2.addLayout(self.horizontalLayout_2)
54         self.checkBoxHideThis = QtGui.QCheckBox(self.groupBox)
55         self.checkBoxHideThis.setObjectName(_fromUtf8("checkBoxHideThis"))
56         self.verticalLayout_2.addWidget(self.checkBoxHideThis)
57         self.verticalLayout.addWidget(self.groupBox)
58         self.horizontalLayout = QtGui.QHBoxLayout()
59         self.horizontalLayout.setObjectName(_fromUtf8("horizontalLayout"))
60         spacerItem = QtGui.QSpacerItem(40, 20, QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Minimum)
61         self.horizontalLayout.addItem(spacerItem)
62         self.pushButtonNew = QtGui.QPushButton(ScrShot)
63         self.pushButtonNew.setObjectName(_fromUtf8("pushButtonNew"))
64         self.horizontalLayout.addWidget(self.pushButtonNew)
65         self.pushButtonSave = QtGui.QPushButton(ScrShot)
66         self.pushButtonSave.setObjectName(_fromUtf8("pushButtonSave"))
67         self.horizontalLayout.addWidget(self.pushButtonSave)
68         self.pushButton_Quit = QtGui.QPushButton(ScrShot)
69         self.pushButton_Quit.setObjectName(_fromUtf8("pushButton_Quit"))
70         self.horizontalLayout.addWidget(self.pushButton_Quit)
71         self.verticalLayout.addLayout(self.horizontalLayout)
72 
73         self.retranslateUi(ScrShot)
74         QtCore.QMetaObject.connectSlotsByName(ScrShot)
75 
76     def retranslateUi(self, ScrShot):
77         ScrShot.setWindowTitle(_translate("ScrShot", "Form", None))
78         self.groupBox.setTitle(_translate("ScrShot", "Options", None))
79         self.labelSpinBox.setText(_translate("ScrShot", "Screenstot Delay:", None))
80         self.checkBoxHideThis.setText(_translate("ScrShot", "Hide This Window", None))
81         self.pushButtonNew.setText(_translate("ScrShot", "新建", None))
82         self.pushButtonSave.setText(_translate("ScrShot", "保存", None))
83         self.pushButton_Quit.setText(_translate("ScrShot", "退出", None))
84 
85 
86 if __name__ == "__main__":
87     import sys
88     app = QtGui.QApplication(sys.argv)
89     ScrShot = QtGui.QWidget()
90     ui = Ui_ScrShot()
91     ui.setupUi(ScrShot)
92     ScrShot.show()
93     sys.exit(app.exec_())

逻辑代码; MainScreenShot.py

 1 # -*- coding: utf-8 -*-
 2 from  PyQt4 import  QtCore, QtGui
 3 from  Screenshot import  Ui_ScrShot
 4 import sys
 5 import icoqrc
 6 class MainFrom(QtGui.QWidget):
 7     def __init__(self):
 8         super(MainFrom, self).__init__()
 9         self.Ui = Ui_ScrShot()
10         self.Ui.setupUi(self)
11         self.Ui.labelShow.setSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)  # size 策略为 可扩展 expanding
12         self.Ui.labelShow.setAlignment(QtCore.Qt.AlignCenter)   #alignment 对齐方式 居中
13         self.Ui.labelShow.setMinimumSize(240, 160)   # 最小为 240 X 160
14         self.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint)  # 设置总是在最前
15         self.setWindowTitle(u'截图工具')
16         self.setWindowIcon(QtGui.QIcon(':qq.ico'))
17 
18         self.shootScreen()
19         self.Ui.spinBox.setSuffix(' s')
20         self.Ui.spinBox.setMaximum(60)
21         self.Ui.spinBox.setValue(5)
22         
23         self.Ui.pushButtonNew.clicked.connect(self.newScreenshot)   # 从新开始新建截图
24         self.Ui.pushButtonSave.clicked.connect(self.saveScreenshot)  # 保存截图
25         self.Ui.pushButton_Quit.clicked.connect(self.close)  # 退出
26 
27  
28 
29     # 截图
30     def shootScreen(self):
31         if self.Ui.spinBox.value() != 0:
32             QtGui.qApp.beep()   #操作带上系统的响铃
33         self.originalPixmap = QtGui.QPixmap.grabWindow(QtGui.QApplication.desktop().winId())  # 获取 屏幕桌面截图
34         self.updateScreenshotLabel()
35         self.Ui.pushButtonNew.setDisabled(False)
36         if self.Ui.checkBoxHideThis.isChecked():  # 当选择隐藏按钮为True时， 截图完成显示窗体
37             self.show()
38 
39 
40         #  获取图片显示在label上
41     def updateScreenshotLabel(self):
42         # self.originalPixmap.scaled()  scaled()函数的声明const返回一个Qpixmap
43         # QtCore.Qt.KeepAspectRatio 尽可能大的在一个给定的矩形大小缩放到一个矩形且保持长宽比。
44         # QtCore.Qt.SmoothTransformation 平滑转换
45         self.Ui.labelShow.setPixmap(self.originalPixmap.scaled(self.Ui.labelShow.size(), QtCore.Qt.KeepAspectRatio, QtCore.Qt.SmoothTransformation))
46 
47         # 保存截图图片
48     def saveScreenshot(self):
49         format = 'png'
50         initialPath = QtCore.QDir.currentPath() + "/untitled." + format
51 
52         fileName = QtGui.QFileDialog.getSaveFileName(self, u"另存为",
53                 initialPath,
54                 "%s Files (*.%s)" % (format.upper(), format))
55         if fileName:
56             self.originalPixmap.save(fileName, format)
57             
58         # 新创建截图
59     def newScreenshot(self):
60         if self.Ui.checkBoxHideThis.isChecked():
61             self.hide()
62         self.Ui.pushButtonNew.setDisabled(True)
63         QtCore.QTimer.singleShot(self.Ui.spinBox.value() * 1000, self.shootScreen)  # * 秒后触发截图
64         
65     # 重载 resizeEvent 方法
66     def resizeEvent(self, event):
67         scaledSize = self.originalPixmap.size()
68         scaledSize.scale(self.Ui.labelShow.size(), QtCore.Qt.KeepAspectRatio)
69         if not self.Ui.labelShow.pixmap() or scaledSize != self.Ui.labelShow.pixmap().size():   # 当pixmap改变大小时候重新加载updateScreenshotLabel
70             self.updateScreenshotLabel()
71 
72 
73 if __name__ == '__main__':
74     App = QtGui.QApplication(sys.argv)
75     MainApp = MainFrom()
76     MainApp.show()
77     sys.exit(App.exec_())
78

效果：

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原文地址：https://www.cnblogs.com/dcb3688/p/4380120.html