Python PyQt5實戰(zhàn)項目之查詢器的實現(xiàn)流程詳解
更新時間：2021年11月09日 10:47:50 作者：不俠居
PyQt5以一套Python模塊的形式來實現(xiàn)功能。它包含了超過620個類，600個方法和函數(shù)。它是一個多平臺的工具套件，它可以運行在所有的主流操作系統(tǒng)中，包含Unix，Windows和Mac OS。PyQt5采用雙重許可模式。開發(fā)者可以在GPL和社區(qū)授權之間選擇
簡介
這是一個操作數(shù)據(jù)庫（sqlite3）的項目，用PyQt5進行界面封裝。
此次項目最主要的是，主界面與子界面的交互,一個主界面與三個子界面交互
可以添加數(shù)據(jù)，修改數(shù)據(jù)，刪除數(shù)據(jù)
主界面
class MainWidget(QMainWindow):
def __init__(self):
super(MainWidget,self).__init__()
self.ui_init()
self.connect_init()
self.sql_init()
def ui_init(self):
self.setWindowTitle('信息查詢')
self.resize(600,700)
self.addwidget = AddWidget()
self.deletewidget = DeleteWidget()
self.updatewidget = UpdateWidget()
self.show_view = QTextBrowser()
self.find_text = QLineEdit()
self.find_btn = QPushButton()
self.find_btn.setText('查詢')
self.update_btn = QPushButton()
self.update_btn.setText('更改')
self.delete_btn = QPushButton()
self.delete_btn.setText('刪除')
self.add_btn = QPushButton()
self.add_btn.setText('添加')
self.status_bar = self.statusBar()
self.widget = QWidget()
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.find_text)
self.h1_layout.addWidget(self.find_btn)
self.h2_layout.addWidget(self.update_btn)
self.h2_layout.addWidget(self.delete_btn)
self.h2_layout.addWidget(self.add_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addWidget(self.show_view)
self.widget.setLayout(self.v_layout)
self.setCentralWidget(self.widget)
def connect_init(self):
'''
信號與槽
'''
'''查詢功能'''
self.find_btn.clicked.connect(lambda:self.find_slot(self.find_text.text()))
'''添加功能'''
self.add_btn.clicked.connect(self.add_slot)
self.addwidget.add_close_signal.connect(lambda:self.setEnabled(True))
self.addwidget.add_start_signal.connect(self.add_start_slot)
'''刪除功能'''
self.delete_btn.clicked.connect(self.delete_slot)
self.deletewidget.delete_close_signal.connect(lambda:self.setEnabled(True))
self.deletewidget.delete_start_signal.connect(self.delete_start_slot)
'''更新功能'''
self.update_btn.clicked.connect(self.update_slot)
self.updatewidget.update_close_signal.connect(lambda:self.setEnabled(True))
self.updatewidget.update_name_signal.connect(self.update_name_slot)
self.updatewidget.update_show_signal.connect(self.update_show_slot)
def sql_init(self):
'''
sqllite3初始化
'''
try:
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('select * from design')
cursor.close()
conn.close()
except:
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('create table design (id integer PRIMARY KEY AUTOINCREMENT,name varchar(20),show varchar(100))')
cursor.close()
conn.close()
'''查詢槽'''
def find_slot(self,content):
try:
result = self.find_func(content)
self.status_bar.showMessage('查詢成功')
if result:
self.show_view.append('<font size="5" color="red">共查詢 {} 條數(shù)據(jù)</font>'.format(len(result)))
for i in range(len(result)):
self.show_view.append('id:' + str(result[i][0]))
self.show_view.append('名稱：' + result[i][1])
self.show_view.append('說明：' + result[i][2])
else:
self.show_view.append('<font size="5" color="red">共查詢 {} 條數(shù)據(jù)</font>'.format(len(result)))
except Exception as e:
self.status_bar.showMessage('查詢失敗')
print(e)
'''添加槽'''
def add_slot(self):
self.addwidget.show()
self.setEnabled(False)
def add_start_slot(self,name,show):
try:
self.insert_func(name,show)
self.status_bar.showMessage('添加成功')
except Exception as e:
self.status_bar.showMessage('添加失敗')
self.setEnabled(True)
self.addwidget.name_text.clear()
self.addwidget.show_text.clear()
self.addwidget.close()
'''刪除槽'''
def delete_slot(self):
self.deletewidget.show()
self.setEnabled(False)
def delete_start_slot(self,id):
try:
self.delete_func(id)
self.reset_func()
self.status_bar.showMessage('刪除成功')
except Exception as e:
self.status_bar.showMessage('刪除失敗')
self.setEnabled(True)
self.deletewidget.close()
'''更新槽'''
def update_slot(self):
self.updatewidget.show()
self.setEnabled(False)
def update_name_slot(self,id,name):
try:
self.update_name_func(id,name)
self.status_bar.showMessage('更新名稱成功')
except Exception as e:
self.status_bar.showMessage('更新名稱失敗')
self.setEnabled(True)
self.updatewidget.close()
def update_show_slot(self,id,name):
try:
self.update_show_func(id,name)
self.status_bar.showMessage('更新名稱成功')
except Exception as e:
self.status_bar.showMessage('更新名稱失敗')
self.setEnabled(True)
self.updatewidget.close()
'''數(shù)據(jù)庫函數(shù)'''
def insert_func(self,name,show):
'''
插入信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('insert into design (id,name,show) values (null,"{}","{}")'.format(name,show))
cursor.close()
conn.commit()
conn.close()
def find_func(self,content):
'''
查詢信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('SELECT * FROM design WHERE name LIKE "%{}%"'.format(content))
result1 = cursor.fetchall()
cursor.close()
conn.close()
return result1
def count_func(self):
'''
信息數(shù)目
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('select * from design')
result = cursor.fetall()
count = len(result)
cursor.close()
conn.close()
return count
def update_name_func(self,id,name):
'''
更新名稱信息
'''
print(id,name)
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('update design set name = ? where id = ?',(name,id))
cursor.close()
conn.commit()
conn.close()
def update_show_func(self,id,name):
'''
更新說明信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('update design set show = ? where id = ?',(name,id))
cursor.close()
conn.commit()
conn.close()
def delete_func(self,id):
'''
刪除信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('delete from design where id = ?',(id,))
cursor.close()
conn.commit()
conn.close()
def reset_func(self):
'''
自增列歸零
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute("DELETE FROM sqlite_sequence WHERE name = 'design'")
cursor.close()
conn.commit()
conn.close()
這個類包括主界面，數(shù)據(jù)庫操作的函數(shù)，與其他界面操作的函數(shù)
當子界面打開時，主界面不可使用
子界面向主界面發(fā)送信號，功能實現(xiàn)代碼都寫在主界面類中
子界面需要在主界面聲明，例如：self.addwidget = AddWidget()
添加功能槽
'''添加槽'''
def add_slot(self):
self.addwidget.show()
self.setEnabled(False)
def add_start_slot(self,name,show):
try:
self.insert_func(name,show)
self.status_bar.showMessage('添加成功')
except Exception as e:
self.status_bar.showMessage('添加失敗')
self.setEnabled(True)
self.addwidget.name_text.clear()
self.addwidget.show_text.clear()
self.addwidget.close()
def add_slot(self):
self.addwidget.show()
self.setEnabled(False)
這個函數(shù)是用來啟動添加界面和將主界面設置為不可用狀態(tài)
def add_start_slot(self,name,show):
try:
self.insert_func(name,show)
self.status_bar.showMessage('添加成功')
except Exception as e:
self.status_bar.showMessage('添加失敗')
self.setEnabled(True)
self.addwidget.name_text.clear()
self.addwidget.show_text.clear()
self.addwidget.close()
這個函數(shù)是添加功能的主要實現(xiàn)，調用數(shù)據(jù)庫插入函數(shù)，數(shù)據(jù)插入完畢后，清除添加子界面的文本，最后關閉添加子界面。其他功能槽大同小異
def reset_func()
def reset_func(self):
'''
自增列歸零
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute("DELETE FROM sqlite_sequence WHERE name = 'design'")
cursor.close()
conn.commit()
conn.close()
這個函數(shù)作用不是很大
只是將sqlite3數(shù)據(jù)庫自帶的系統(tǒng)表，數(shù)據(jù)庫被創(chuàng)建時，sqlite_sequence表會被自動創(chuàng)建，該表包括兩列。第一列為name，用來存儲表的名稱。第二列為seq，用來保存表對應的RowID的最大值，當對應的表增加記錄，該表會自動更新。當表刪除，該表對應的記錄也會自動刪除。
本來我是想當有數(shù)據(jù)刪除時，ID值能重新更新，可是這個方法，只有當表內數(shù)據(jù)全部刪除時，ID才會重新開始
添加數(shù)據(jù)的界面
class AddWidget(QWidget):
'''
添加功能界面
'''
add_start_signal = pyqtSignal(str,str)
add_close_signal = pyqtSignal()
def __init__(self):
super(AddWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('添加信息')
self.setFixedSize(300,200)
self.name_text = QLineEdit()
self.show_text = QTextEdit()
self.start_btn = QPushButton()
self.start_btn.setText('添加')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.name_label = QLabel()
self.name_label.setText('名稱：')
self.show_label = QLabel()
self.show_label.setText('說明：')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.h3_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.name_label)
self.h1_layout.addWidget(self.name_text)
self.h2_layout.addWidget(self.show_label)
self.h2_layout.addWidget(self.show_text)
self.h3_layout.addWidget(self.start_btn)
self.h3_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addLayout(self.h3_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.start_btn.clicked.connect(self.start_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def start_slot(self):
name = self.name_text.text()
show = self.show_text.toPlainText()
self.add_start_signal.emit(name,show)
def close_slot(self):
self.close()
self.add_close_signal.emit()
def closeEvent(self, event):
'''重寫關閉事件'''
self.add_close_signal.emit()
這是添加數(shù)據(jù)的界面
自定義了兩個信號
1.添加數(shù)據(jù)的信號，當按下添加按鈕，這個界面向主界面?zhèn)鬏攦蓚€字符串
2.結束這個界面的信號，不管是×了這個界面（重寫了關閉事件）還是按下取消按鈕，都向主界面發(fā)送信號，用來使主界面可以使用
刪除數(shù)據(jù)的界面
class DeleteWidget(QWidget):
'''
刪除功能界面
'''
delete_cancel_signal = pyqtSignal()
delete_start_signal = pyqtSignal(str)
delete_close_signal = pyqtSignal()
def __init__(self):
super(DeleteWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('刪除信息')
self.setFixedSize(300,100)
self.id_text = QLineEdit()
self.start_btn = QPushButton()
self.start_btn.setText('刪除')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.id_label = QLabel()
self.id_label.setText('要刪除的id：')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.id_label)
self.h1_layout.addWidget(self.id_text)
self.h2_layout.addWidget(self.start_btn)
self.h2_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.start_btn.clicked.connect(self.start_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def start_slot(self):
id = self.id_text.text()
self.delete_start_signal.emit(id)
def close_slot(self):
self.close()
self.delete_close_signal.emit()
def closeEvent(self, event):
self.delete_close_signal.emit()
這是刪除數(shù)據(jù)的界面，跟之前界面布局基本一樣
修改數(shù)據(jù)的界面
class UpdateWidget(QWidget):
'''
更新功能界面
'''
update_name_signal = pyqtSignal(int,str)
update_show_signal = pyqtSignal(int,str)
update_close_signal = pyqtSignal()
def __init__(self):
super(UpdateWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('修改信息')
self.setFixedSize(300,150)
self.content_text = QLineEdit()
self.id_text = QLineEdit()
self.name_btn = QPushButton()
self.name_btn.setText('修改名稱')
self.show_btn = QPushButton()
self.show_btn.setText('修改說明')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.content_label = QLabel()
self.content_label.setText('修改內容：')
self.id_label = QLabel()
self.id_label.setText('選擇id為:')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.h3_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.id_label)
self.h1_layout.addWidget(self.id_text)
self.h2_layout.addWidget(self.content_label)
self.h2_layout.addWidget(self.content_text)
self.h3_layout.addWidget(self.name_btn)
self.h3_layout.addWidget(self.show_btn)
self.h3_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addLayout(self.h3_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.name_btn.clicked.connect(self.update_name_slot)
self.show_btn.clicked.connect(self.update_show_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def update_name_slot(self):
id = self.id_text.text()
id = int(id)
content = self.content_text.text()
self.update_name_signal.emit(id,content)
def update_show_slot(self):
id = self.id_text.text()
id = int(id)
content = self.content_text.text()
self.update_show_signal.emit(id,content)
def close_slot(self):
self.close()
self.update_close_signal.emit()
def closeEvent(self, event):
self.update_close_signal.emit()
這個更新數(shù)據(jù)的界面，跟之前的界面的布局基本一樣
全部代碼
import sys
from PyQt5.QtCore import pyqtSignal
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QPushButton, QTextEdit, QHBoxLayout, QVBoxLayout, QLineEdit, QLabel,QTextBrowser
import sqlite3
class MainWidget(QMainWindow):
def __init__(self):
super(MainWidget,self).__init__()
self.ui_init()
self.connect_init()
self.sql_init()
def ui_init(self):
self.setWindowTitle('信息查詢')
self.resize(600,700)
self.addwidget = AddWidget()
self.deletewidget = DeleteWidget()
self.updatewidget = UpdateWidget()
self.show_view = QTextBrowser()
self.find_text = QLineEdit()
self.find_btn = QPushButton()
self.find_btn.setText('查詢')
self.update_btn = QPushButton()
self.update_btn.setText('更改')
self.delete_btn = QPushButton()
self.delete_btn.setText('刪除')
self.add_btn = QPushButton()
self.add_btn.setText('添加')
self.status_bar = self.statusBar()
self.widget = QWidget()
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.find_text)
self.h1_layout.addWidget(self.find_btn)
self.h2_layout.addWidget(self.update_btn)
self.h2_layout.addWidget(self.delete_btn)
self.h2_layout.addWidget(self.add_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addWidget(self.show_view)
self.widget.setLayout(self.v_layout)
self.setCentralWidget(self.widget)
def connect_init(self):
'''
信號與槽
'''
'''查詢功能'''
self.find_btn.clicked.connect(lambda:self.find_slot(self.find_text.text()))
'''添加功能'''
self.add_btn.clicked.connect(self.add_slot)
self.addwidget.add_close_signal.connect(lambda:self.setEnabled(True))
self.addwidget.add_start_signal.connect(self.add_start_slot)
'''刪除功能'''
self.delete_btn.clicked.connect(self.delete_slot)
self.deletewidget.delete_close_signal.connect(lambda:self.setEnabled(True))
self.deletewidget.delete_start_signal.connect(self.delete_start_slot)
'''更新功能'''
self.update_btn.clicked.connect(self.update_slot)
self.updatewidget.update_close_signal.connect(lambda:self.setEnabled(True))
self.updatewidget.update_name_signal.connect(self.update_name_slot)
self.updatewidget.update_show_signal.connect(self.update_show_slot)
def sql_init(self):
'''
sqllite3初始化
'''
try:
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('select * from design')
cursor.close()
conn.close()
except:
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('create table design (id integer PRIMARY KEY AUTOINCREMENT,name varchar(20),show varchar(100))')
cursor.close()
conn.close()
'''查詢槽'''
def find_slot(self,content):
try:
result = self.find_func(content)
self.status_bar.showMessage('查詢成功')
if result:
self.show_view.append('<font size="5" color="red">共查詢 {} 條數(shù)據(jù)</font>'.format(len(result)))
for i in range(len(result)):
self.show_view.append('id:' + str(result[i][0]))
self.show_view.append('名稱：' + result[i][1])
self.show_view.append('說明：' + result[i][2])
else:
self.show_view.append('<font size="5" color="red">共查詢 {} 條數(shù)據(jù)</font>'.format(len(result)))
except Exception as e:
self.status_bar.showMessage('查詢失敗')
print(e)
'''添加槽'''
def add_slot(self):
self.addwidget.show()
self.setEnabled(False)
def add_start_slot(self,name,show):
try:
self.insert_func(name,show)
self.status_bar.showMessage('添加成功')
except Exception as e:
self.status_bar.showMessage('添加失敗')
self.setEnabled(True)
self.addwidget.name_text.clear()
self.addwidget.show_text.clear()
self.addwidget.close()
'''刪除槽'''
def delete_slot(self):
self.deletewidget.show()
self.setEnabled(False)
def delete_start_slot(self,id):
try:
self.delete_func(id)
self.reset_func()
self.status_bar.showMessage('刪除成功')
except Exception as e:
self.status_bar.showMessage('刪除失敗')
self.setEnabled(True)
self.deletewidget.close()
'''更新槽'''
def update_slot(self):
self.updatewidget.show()
self.setEnabled(False)
def update_name_slot(self,id,name):
try:
self.update_name_func(id,name)
self.status_bar.showMessage('更新名稱成功')
except Exception as e:
self.status_bar.showMessage('更新名稱失敗')
self.setEnabled(True)
self.updatewidget.close()
def update_show_slot(self,id,name):
try:
self.update_show_func(id,name)
self.status_bar.showMessage('更新名稱成功')
except Exception as e:
self.status_bar.showMessage('更新名稱失敗')
self.setEnabled(True)
self.updatewidget.close()
'''數(shù)據(jù)庫函數(shù)'''
def insert_func(self,name,show):
'''
插入信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('insert into design (id,name,show) values (null,"{}","{}")'.format(name,show))
cursor.close()
conn.commit()
conn.close()
def find_func(self,content):
'''
查詢信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('SELECT * FROM design WHERE name LIKE "%{}%"'.format(content))
result1 = cursor.fetchall()
cursor.close()
conn.close()
return result1
def count_func(self):
'''
信息數(shù)目
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('select * from design')
result = cursor.fetchall()
count = len(result)
cursor.close()
conn.close()
return count
def update_name_func(self,id,name):
'''
更新名稱信息
'''
print(id,name)
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('update design set name = ? where id = ?',(name,id))
cursor.close()
conn.commit()
conn.close()
def update_show_func(self,id,name):
'''
更新說明信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('update design set show = ? where id = ?',(name,id))
cursor.close()
conn.commit()
conn.close()
def delete_func(self,id):
'''
刪除信息
'''
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute('delete from design where id = ?',(id,))
cursor.close()
conn.commit()
conn.close()
def reset_func(self):
conn = sqlite3.connect('find.db')
cursor = conn.cursor()
cursor.execute("DELETE FROM sqlite_sequence WHERE name = 'design'")
cursor.close()
conn.commit()
conn.close()
class AddWidget(QWidget):
'''
添加功能界面
'''
add_start_signal = pyqtSignal(str,str)
add_close_signal = pyqtSignal()
def __init__(self):
super(AddWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('添加信息')
self.setFixedSize(300,200)
self.name_text = QLineEdit()
self.show_text = QTextEdit()
self.start_btn = QPushButton()
self.start_btn.setText('添加')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.name_label = QLabel()
self.name_label.setText('名稱：')
self.show_label = QLabel()
self.show_label.setText('說明：')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.h3_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.name_label)
self.h1_layout.addWidget(self.name_text)
self.h2_layout.addWidget(self.show_label)
self.h2_layout.addWidget(self.show_text)
self.h3_layout.addWidget(self.start_btn)
self.h3_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addLayout(self.h3_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.start_btn.clicked.connect(self.start_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def start_slot(self):
name = self.name_text.text()
show = self.show_text.toPlainText()
self.add_start_signal.emit(name,show)
def close_slot(self):
self.close()
self.add_close_signal.emit()
def closeEvent(self, event):
self.add_close_signal.emit()
class DeleteWidget(QWidget):
'''
刪除功能界面
'''
delete_cancel_signal = pyqtSignal()
delete_start_signal = pyqtSignal(str)
delete_close_signal = pyqtSignal()
def __init__(self):
super(DeleteWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('刪除信息')
self.setFixedSize(300,100)
self.id_text = QLineEdit()
self.start_btn = QPushButton()
self.start_btn.setText('刪除')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.id_label = QLabel()
self.id_label.setText('要刪除的id：')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.id_label)
self.h1_layout.addWidget(self.id_text)
self.h2_layout.addWidget(self.start_btn)
self.h2_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.start_btn.clicked.connect(self.start_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def start_slot(self):
id = self.id_text.text()
self.delete_start_signal.emit(id)
def close_slot(self):
self.close()
self.delete_close_signal.emit()
def closeEvent(self, event):
self.delete_close_signal.emit()
class UpdateWidget(QWidget):
'''
更新功能界面
'''
update_name_signal = pyqtSignal(int,str)
update_show_signal = pyqtSignal(int,str)
update_close_signal = pyqtSignal()
def __init__(self):
super(UpdateWidget,self).__init__()
self.ui_init()
self.connect_init()
def ui_init(self):
self.setWindowTitle('修改信息')
self.setFixedSize(300,150)
self.content_text = QLineEdit()
self.id_text = QLineEdit()
self.name_btn = QPushButton()
self.name_btn.setText('修改名稱')
self.show_btn = QPushButton()
self.show_btn.setText('修改說明')
self.cancel_btn = QPushButton()
self.cancel_btn.setText('取消')
self.content_label = QLabel()
self.content_label.setText('修改內容：')
self.id_label = QLabel()
self.id_label.setText('選擇id為:')
self.h1_layout = QHBoxLayout()
self.h2_layout = QHBoxLayout()
self.h3_layout = QHBoxLayout()
self.v_layout = QVBoxLayout()
self.h1_layout.addWidget(self.id_label)
self.h1_layout.addWidget(self.id_text)
self.h2_layout.addWidget(self.content_label)
self.h2_layout.addWidget(self.content_text)
self.h3_layout.addWidget(self.name_btn)
self.h3_layout.addWidget(self.show_btn)
self.h3_layout.addWidget(self.cancel_btn)
self.v_layout.addLayout(self.h1_layout)
self.v_layout.addLayout(self.h2_layout)
self.v_layout.addLayout(self.h3_layout)
self.setLayout(self.v_layout)
def connect_init(self):
self.name_btn.clicked.connect(self.update_name_slot)
self.show_btn.clicked.connect(self.update_show_slot)
self.cancel_btn.clicked.connect(self.close_slot)
def update_name_slot(self):
id = self.id_text.text()
id = int(id)
content = self.content_text.text()
self.update_name_signal.emit(id,content)
def update_show_slot(self):
id = self.id_text.text()
id = int(id)
content = self.content_text.text()
self.update_show_signal.emit(id,content)
def close_slot(self):
self.close()
self.update_close_signal.emit()
def closeEvent(self, event):
self.update_close_signal.emit()
if __name__ == '__main__':
app = QApplication(sys.argv)
dispaly = MainWidget()
dispaly.show()
sys.exit(app.exec_())
展示
到此這篇關于Python PyQt5實戰(zhàn)項目之查詢器的實現(xiàn)流程詳解的文章就介紹到這了,更多相關Python PyQt5 查詢器內容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關文章希望大家以后多多支持腳本之家！
相關文章
本文主要介紹了pandas中關于apply+lambda的應用，文中通過示例代碼介紹的非常詳細，具有一定的參考價值，感興趣的小伙伴們可以參考一下2022-02-02
這篇文章主要為大家詳細介紹了NLTK 3.2.4 環(huán)境搭建教程，具有一定的參考價值，感興趣的小伙伴們可以參考一下2018-09-09
今天小編就為大家分享一篇對web.py設置favicon.ico的方法詳解，具有很好的參考價值，希望對大家有所幫助。一起跟隨小編過來看看吧2018-12-12
python3.5實現(xiàn)socket通訊示例(TCP）
本篇文章主要介紹了python3.5實現(xiàn)socket通訊示例(TCP），小編覺得挺不錯的，現(xiàn)在分享給大家，也給大家做個參考。一起跟隨小編過來看看吧2017-02-02
這篇文章主要為大家介紹了python編程學習np.float 被刪除的問題解析，有需要的朋友可以借鑒參考下，希望能夠有所幫助，祝大家多多進步，早日升職加薪2023-02-02
Linux系統(tǒng)（CentOS）下python2.7.10安裝
這篇文章主要為大家詳細介紹了Linux系統(tǒng)（CentOS）下python2.7.10安裝圖文教程，具有一定的參考價值，感興趣的小伙伴們可以參考一下2018-09-09
Python編程實現(xiàn)控制cmd命令行顯示顏色的方法示例
這篇文章主要介紹了Python編程實現(xiàn)控制cmd命令行顯示顏色的方法,結合實例形式分析了Python針對命令行字符串顯示顏色屬性相關操作技巧,需要的朋友可以參考下2017-08-08
這篇文章主要介紹了基于python圖書館管理系統(tǒng)設計實例詳解，文中通過示例代碼介紹的非常詳細，對大家的學習或者工作具有一定的參考學習價值，需要的朋友們下面隨著小編來一起學習學習吧2020-08-08
這篇文章主要介紹了使用Python腳本生成隨機IP的簡單方法,并且可以自己設定IP數(shù)值范圍,需要的朋友可以參考下2015-07-07
Pycharm搭建Django項目詳細教程(看完這一篇就夠了)
這篇文章主要給大家介紹了關于Pycharm搭建Django項目的詳細教程,想要學習的小伙伴看完這一篇就夠了,pycharm是一種Python?IDE,帶有一整套可以幫助用戶在使用Python語言開發(fā)時提高其效率的工具,需要的朋友可以參考下2023-11-11