颜色对话框和字体对话框
颜色对话框：
字体对话框：
1 import sys
2 from PyQt5.QtWidgets import QApplication, QWidget, QTextEdit, QColorDialog, QFontDialog, QPushButton, \
3 QHBoxLayout, QVBoxLayout
4
5
6 class Demo(QWidget):
7 def __init__(self):
8 super(Demo, self).__init__()
9 self.text_edit = QTextEdit(self)
10
11 self.color_btn = QPushButton('颜色按钮', self)
12 self.font_btn = QPushButton('字体按钮', self)
13 self.color_btn.clicked.connect(lambda: self.open_dialog_func(self.color_btn))
14 self.font_btn.clicked.connect(lambda: self.open_dialog_func(self.font_btn))
15
16 self.h_layout = QHBoxLayout()
17 self.h_layout.addWidget(self.color_btn)
18 self.h_layout.addWidget(self.font_btn)
19 self.v_layout = QVBoxLayout()
20 self.v_layout.addWidget(self.text_edit)
21 self.v_layout.addLayout(self.h_layout)
22 self.setLayout(self.v_layout)
23
24 def open_dialog_func(self, btn):
25 if btn == self.color_btn:
26 color = QColorDialog.getColor()
27 #显示颜色对话框，当选择一种颜色后其十六进制的值会保存在color变量中，但如果点击对话框中的取消(Cancel)按钮的话，则color为无效值
28 print(color) #<PyQt5.QtGui.QColor object at 0x0000006AE664EE48>
29 if color.isValid():#color.isValid() 返回color是否有效
30 self.text_edit.setTextColor(color) #给多行文本编辑框设置颜色
31 else:
32 font, ok = QFontDialog.getFont()
33 #显示字体对话框，该方法返回两个值，分别为QFont和bool值，如果用户选择了一种字体并按下确定(Ok)的话，则font保存所选择的QFont值，并且ok为True。若按下取消(Cancel)的话，则bool为False
34 if ok:
35 self.text_edit.setFont(font) #给多行文本编辑框设置字体
36
37
38 if __name__ == '__main__':
39 app = QApplication(sys.argv)
40 demo = Demo()
41 demo.show()
42 sys.exit(app.exec_())
输入对话框
样式：QInputDialog.getText 单行文本输入框
样式:QInputDialog.getItem 下拉列表选择输入框
样式：整数数字输入框 QInputDialog.getInt
样式：浮点数输入框QInputDialog.getDouble
样式：QInputDialog.getMultiLineText 多行文本输入框
1 import sys
2 from PyQt5.QtWidgets import QApplication, QWidget, QInputDialog, QLineEdit, QTextEdit, QPushButton, \
3 QGridLayout
4
5
6 class Demo(QWidget):
7 def __init__(self):
8 super(Demo, self).__init__()
9 self.name_btn = QPushButton('Name', self)
10 self.gender_btn = QPushButton('Gender', self)
11 self.age_btn = QPushButton('Age', self)
12 self.score_btn = QPushButton('Score', self)
13 self.info_btn = QPushButton('Info', self)
14
15 self.name_btn.clicked.connect(lambda: self.open_dialog_func(self.name_btn))
16 self.gender_btn.clicked.connect(lambda: self.open_dialog_func(self.gender_btn))
17 self.age_btn.clicked.connect(lambda: self.open_dialog_func(self.age_btn))
18 self.score_btn.clicked.connect(lambda: self.open_dialog_func(self.score_btn))
19 self.info_btn.clicked.connect(lambda: self.open_dialog_func(self.info_btn))
20
21 self.name_line = QLineEdit(self)
22 self.gender_line = QLineEdit(self)
23 self.age_line = QLineEdit(self)
24 self.score_line = QLineEdit(self)
25 self.info_textedit = QTextEdit(self)
26
27 self.g_layout = QGridLayout()
28 self.g_layout.addWidget(self.name_btn, 0, 0, 1, 1)
29 self.g_layout.addWidget(self.name_line, 0, 1, 1, 1)
30 self.g_layout.addWidget(self.gender_btn, 1, 0, 1, 1)
31 self.g_layout.addWidget(self.gender_line, 1, 1, 1, 1)
32 self.g_layout.addWidget(self.age_btn, 2, 0, 1, 1)
33 self.g_layout.addWidget(self.age_line, 2, 1, 1, 1)
34 self.g_layout.addWidget(self.score_btn, 3, 0, 1, 1)
35 self.g_layout.addWidget(self.score_line, 3, 1, 1, 1)
36 self.g_layout.addWidget(self.info_btn, 4, 0, 1, 1)
37 self.g_layout.addWidget(self.info_textedit, 4, 1, 1, 1)
38 self.setLayout(self.g_layout)
39
40 def open_dialog_func(self, btn):
41 if btn == self.name_btn:
42 name, ok = QInputDialog.getText(self, '输入对话框', '请输入名字:') #打开单行文本输入框
43 #参数1：父类
44 #参数2：标题 参数3：提示内容
45 #返回一个字符串(用户输入的文本)和一个布尔值，若点击输入框的ok按钮，则变量ok就为True
46 if ok:
47 self.name_line.setText(name)
48 elif btn == self.gender_btn:
49 gender_list = ['男', '女']
50 gender, ok = QInputDialog.getItem(self, 'Gender Input', 'Please choose the gender:', gender_list, 0, False)
51 #打开下拉列表选择输入框
52 #参数1：指定父类 参数2：标题 参数3：提示内容
53 #参数4：要加入的选项内容
54 #参数5：最初显示的选项
55 #参数6：选项内容是否可编辑，这里设为False，不可编辑
56 #返回两个值：第一个选择的内容-字符串 第二个如果用户点击OK按钮，就是True
57
58 if ok:
59 self.gender_line.setText(gender)
60 elif btn == self.age_btn:
61 age, ok = QInputDialog.getInt(self, 'Age Input', 'Please select the age:')
62 #打开整数数字输入框
63 #参数1：父类 参数2：标题 参数3：提示内容
64 #返回两个值：第一个 用户选择的整数数值 第二个如果用户点击OK按钮，就是True
65 if ok:
66 self.age_line.setText(str(age))
67 elif btn == self.score_btn:
68 score, ok = QInputDialog.getDouble(self, 'Score Input', 'Please select the score:')
69 # 打开浮点数数字输入框
70 # 参数1：父类 参数2：标题 参数3：提示内容
71 # 返回两个值：第一个 用户选择的数值 第二个如果用户点击OK按钮，就是True
72 if ok:
73 self.score_line.setText(str(score))
74 else:
75 info, ok = QInputDialog.getMultiLineText(self, 'Info Input', 'Please enter the info:')
76 # 打开多行文本输入框
77 # 参数1：父类 参数2：标题 参数3：提示内容
78 # 返回两个值：第一个 用户输入的字符串 第二个如果用户点击OK按钮，就是True
79 if ok:
80 self.info_textedit.setText(info)
81
82
83 if __name__ == '__main__':
84 app = QApplication(sys.argv)
85 demo = Demo()
86 demo.show()
87 sys.exit(app.exec_())
文件对话框
1 import sys
2 from PyQt5.QtWidgets import QApplication, QWidget, QTextEdit, QPushButton, QMessageBox, QVBoxLayout, \
3 QHBoxLayout, QFileDialog
4
5
6 class Demo(QWidget):
7 def __init__(self):
8 super(Demo, self).__init__()
9
10 self.is_saved = True
11 self.is_saved_first = True
12 self.path = ''
13
14 self.textedit = QTextEdit(self)
15 self.textedit.textChanged.connect(self.on_textchanged_func)
16
17 self.button = QPushButton('Save', self)
18 self.button.clicked.connect(self.on_clicked_func)
19 self.button_2 = QPushButton('Open', self)
20 self.button_2.clicked.connect(self.open_file_func)
21 #
22 self.h_layout = QHBoxLayout()
23 self.h_layout.addWidget(self.button)
24 self.h_layout.addWidget(self.button_2)
25 self.v_layout = QVBoxLayout()
26 self.v_layout.addWidget(self.textedit)
27 self.v_layout.addLayout(self.h_layout)
28 self.setLayout(self.v_layout)
29 #
30 def on_textchanged_func(self):
31 if self.textedit.toPlainText():
32 self.is_saved = False
33 else:
34 self.is_saved = True
35
36 def on_clicked_func(self):
37 if self.is_saved_first:
38 self.save_as_func(self.textedit.toPlainText())
39 else:
40 self.save_func(self.textedit.toPlainText())
41
42 def save_func(self, text):
43 with open(self.path, 'w') as f:
44 f.write(text)
45 self.is_saved = True
46
47 def save_as_func(self, text):
48 self.path, p = QFileDialog.getSaveFileName(self, 'Save File', './', 'Files (*.txt *.log)')
49 #打开文件对话框
50 #参数1：指定父类 参数2：标题 参数3：路径 参数4：为文件扩展名过滤器——对话框只会显示该过滤器所提供的扩展名
51 #返回两个值：第一个-绝对路径 第二个过滤器
52 print(self.path) #D:/ss/ssss/lmlmlm.txt
53 print(p) #Files (*.txt *.log)
54 if self.path:
55 with open(self.path, 'w') as f:
56 f.write(text)
57 self.is_saved = True
58 self.is_saved_first = False
59
60 def open_file_func(self):
61 file, _ = QFileDialog.getOpenFileName(self, 'Open File', './', 'Files (*.txt *.log)')
62 if file:
63 with open(file, 'r') as f:
64 self.textedit.clear()
65 self.textedit.setText(f.read())
66 self.is_saved = True
67 #
68 def closeEvent(self, QCloseEvent):
69 if not self.is_saved:
70 choice = QMessageBox.question(self, '', 'Do you want to save the text?',
71 QMessageBox.Yes | | QMessageBox.Cancel)
72 if choice == QMessageBox.Yes:
73 self.on_clicked_func()
74 QCloseEvent.accept()
75 elif choice == :
76 QCloseEvent.accept()
77 else:
78 QCloseEvent.ignore()
79
80
81 if __name__ == '__main__':
82 app = QApplication(sys.argv)
83 demo = Demo()
84 demo.show()
85 sys.exit(app.exec_())
