# PyQt5範例程式

## PyQt5 - 多視窗傳值

from PyQt5.QtWidgets import QMainWindow, QApplication, QWidget, QGridLayout, QHBoxLayout
from PyQt5.QtCore import pyqtSignal
import sys
from PyQt5.QtWidgets import QLabel, QPushButton,QLineEdit 

class Main_GUI(QMainWindow):
    # 建立兩個信號槽，用來觸發顯示視窗的函式
    open_child1 = pyqtSignal()
    open_child2 = pyqtSignal()
    
    def __init__(self):
        super().__init__()
        self.initUI()
        
    def initUI(self):
        # 視窗名稱
        self.setWindowTitle(f'Main_GUI')
        
        # 設定布局
        widget = QWidget()
        self.setCentralWidget(widget)
        layout = QHBoxLayout()
        widget.setLayout(layout)

        # 按鈕1
        btn = QPushButton('Open1')
        btn.clicked.connect(self.open1)
        layout.addWidget(btn)
        
        # 按鈕2
        btn = QPushButton('Open2')
        btn.clicked.connect(self.open2)
        layout.addWidget(btn)
        
        # 初始化完成後顯示自己
        self.show()
        
    def open1(self):
        self.open_child1.emit()
    def open2(self):
        self.open_child2.emit()

class child1(QWidget):
    # 傳送文字的信號槽
    # ()內的是要發送的資料型態
    # str表示發送信號時會帶一串文字
    # 亦可使用dict/list之類格式夾帶更多資料
    send_message = pyqtSignal(str)
    
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        # 設定視窗名稱及大小
        self.setFixedSize(250, 150)
        self.setWindowTitle(f'Child1')
        
        # 設定布局
        # 注意布局縱軸是第1個參數
        # 橫軸是第二個參數
        layout = QGridLayout()
        self.setLayout(layout)

        # 在(0,0)的位置加入一個占用1*1大小的標籤
        layout.addWidget(QLabel('輸入文字:'), 0, 0, 1, 1)
        
        # 在(0,1)的位置加入一個占用1*2大小的輸入框
        self.inp = QLineEdit()
        layout.addWidget(self.inp, 0, 1, 1, 2)

        # 在(1,0)的位置加入一個占用1*3大小的按鈕
        # 此按鈕綁定send函數
        btn = QPushButton('確定')
        btn.clicked.connect(self.send)
        layout.addWidget(btn, 1, 0, 1, 3)
    
    def open(self):
        self.show()
    
    def send(self):
        # 帶著輸入的文字發送一個信號
        self.send_message.emit(self.inp.text())
        
class child2(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        # 設定視窗名稱及大小
        self.setFixedSize(250, 150)
        self.setWindowTitle(f'Child2')
        
        # 設定布局
        layout = QHBoxLayout()
        self.setLayout(layout)

        # 設定用來顯示的標籤
        layout.addWidget(QLabel('接收文字:'))
        
        # 設定用來顯示輸入文字的標籤
        self.print_label = QLabel('')
        layout.addWidget(self.print_label)

    
    def open(self):
        self.show()
    
    def print_message(self,str):
        self.print_label.setText(str)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    
    # 先建立三個視窗物件
    mainGUI = Main_GUI()
    child1 = child1()
    child2 = child2()
    
    # 將主畫面兩個信號發送時綁定兩個子視窗的處理函式
    mainGUI.open_child1.connect(child1.open)
    mainGUI.open_child2.connect(child2.open)
    
    # 將child1發送文字的信號綁定child2的處理函式
    child1.send_message.connect(child2.print_message)
    sys.exit(app.exec_())

## PyQt5 - 更改背景色

from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QHBoxLayout
from PyQt5.QtWidgets import QWidget, QLabel, QPushButton
import sys

class myGUI(QMainWindow):
    def __init__(self):
        super().__init__()
        self.lightList = []
        vbox = QVBoxLayout()
        vbox.addLayout(self.makeButtonGroup(1))
        vbox.addLayout(self.makeButtonGroup(2))
        vbox.addLayout(self.makeButtonGroup(3))

        widget = QWidget()
        self.setCentralWidget(widget)
        widget.setLayout(vbox)
        self.show()

    def makeButtonGroup(self,groupNumber):
        btn_start = QPushButton()
        btn_start.setText("Start Record "+str(groupNumber))
        btn_start.clicked.connect(self.startRecord)

        btn_stop = QPushButton()
        btn_stop.setText("Stop Record "+str(groupNumber))
        btn_stop.clicked.connect(self.stopRecord)

        lbl_light = QLabel("未錄影")
        lbl_light.setStyleSheet("QLabel { background-color : red}")
        self.lightList.append(lbl_light)

        hbox = QHBoxLayout()
        hbox.addWidget(btn_start)
        hbox.addWidget(btn_stop)
        hbox.addWidget(lbl_light)
        return hbox

    def startRecord(self):
        sender = self.sender()
        groupNumber = int(sender.text().split(" ")[-1])
        self.lightList[groupNumber-1].setStyleSheet("QLabel { background-color : Green}")
        self.lightList[groupNumber - 1].setText("錄影中")

    def stopRecord(self):
        sender = self.sender()
        groupNumber = int(sender.text().split(" ")[-1])
        self.lightList[groupNumber - 1].setStyleSheet("QLabel { background-color : red}")
        self.lightList[groupNumber - 1].setText("未錄影")

if __name__ == '__main__':
    app = QApplication(sys.argv)
    mainGUI = myGUI()
    sys.exit(app.exec_())