从Pyqt的examples中看到一段截图代码， （路径：examplas\desktop\screenshot.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：
