我正在尝试在按下^和v按钮以向上和向下滚动时突出显示QTextEdit中的行，并在输入/选择时打印所选项目。
以下是代码段。我无法了解如何突出显示项目。
#!/usr/bin/python
""" Imports """
import sys
from PyQt4 import QtGui, QtCore
import sys, time
from PyQt4.QtCore import QSize, pyqtSignal
""" Globals """
global topTxt, midTxt, endTxt
global powerOpt, AlrmSil, bootC
global btn1,btn2,btn3,btn4,btn5,btn6,btn7,btn8,btn9
global btn0,btnDot,btnBK,btnClr,btnMain,btnChg,btnOpt,btnClrTot,btnPWR,btnAlrm,btnStrt,btnStop
global highVal, lowVal
global selectionTxt
highVal = 55
lowVal = 10
""" Globals Initialization"""
powerOpt = 0
AlrmSil = 0
class trial(QtGui.QMainWindow):
sigTextButtonClicked = pyqtSignal(QtCore.QString)
sigTextUpdated = pyqtSignal(QtCore.QString)
def __init__(self):
""" Constructor """
super(trial, self).__init__()
self.initKey()
self.initText()
self.showUI()
def disableBt(self):
global btn1,btn2,btn3,btn4,btn5,btn6,btn7,btn8,btn9
global btn0,btnDot,btnBK,btnClr,btnMain,btnChg,btnOpt,btnClrTot,btnPWR,btnAlrm,btnStrt,btnStop
btn1.setEnabled(False)
btn2.setEnabled(False)
btn3.setEnabled(False)
btn4.setEnabled(False)
btn5.setEnabled(False)
btn6.setEnabled(False)
btn7.setEnabled(False)
btn8.setEnabled(False)
btn9.setEnabled(False)
btn0.setEnabled(False)
btnDot.setEnabled(False)
btnBK.setEnabled(False)
def enableBt(self):
global btn1,btn2,btn3,btn4,btn5,btn6,btn7,btn8,btn9
global btn0,btnDot,btnBK,btnClr,btnMain,btnChg,btnOpt,btnClrTot,btnPWR,btnAlrm,btnStrt,btnStop
btn1.setEnabled(True)
btn2.setEnabled(True)
btn3.setEnabled(True)
btn4.setEnabled(True)
btn5.setEnabled(True)
btn6.setEnabled(True)
btn7.setEnabled(True)
btn8.setEnabled(True)
btn9.setEnabled(True)
btn0.setEnabled(True)
btnDot.setEnabled(True)
btnBK.setEnabled(True)
def initKey(self):
""" This function initializes the buttons in the UI """
global btn1,btn2,btn3,btn4,btn5,btn6,btn7,btn8,btn9
global btn0,btnDot,btnBK,btnClr,btnMain,btnChg,btnOpt,btnClrTot,btnPWR,btnAlrm,btnStrt,btnStop
btn1 = QtGui.QPushButton("1", self)
btn1.setFixedWidth(30)
btn1.move(650, 50)
# btn1.setEnabled(False)
btn2 = QtGui.QPushButton("2", self)
btn2.setFixedWidth(30)
btn2.move(690, 50)
# btn2.setEnabled(False)
btn3 = QtGui.QPushButton("3", self)
btn3.setFixedWidth(30)
btn3.move(730, 50)
btn4 = QtGui.QPushButton("4", self)
btn4.setFixedWidth(30)
btn4.move(650, 100)
btn5 = QtGui.QPushButton("5", self)
btn5.setFixedWidth(30)
btn5.move(690, 100)
btn6 = QtGui.QPushButton("6", self)
btn6.setFixedWidth(30)
btn6.move(730, 100)
btn7 = QtGui.QPushButton("7", self)
btn7.setFixedWidth(30)
btn7.move(650, 150)
btn8 = QtGui.QPushButton("8", self)
btn8.setFixedWidth(30)
btn8.move(690, 150)
btn9 = QtGui.QPushButton("9", self)
btn9.setFixedWidth(30)
btn9.move(730, 150)
btnBK = QtGui.QPushButton("Back", self)
btnBK.setFixedWidth(40)
btnBK.move(650, 200)
btn0 = QtGui.QPushButton("0", self)
btn0.setFixedWidth(30)
btn0.move(690, 200)
btnDot = QtGui.QPushButton(".", self)
btnDot.setFixedWidth(30)
btnDot.move(730, 200)
btnUp = QtGui.QPushButton("^", self)
btnUp.setFixedWidth(30)
btnUp.move(450, 50)
btnDwn = QtGui.QPushButton("v", self)
btnDwn.setFixedWidth(30)
btnDwn.move(450, 200)
btnEnt = QtGui.QPushButton("Enter", self)
btnEnt.setFixedWidth(30)
btnEnt.move(450, 125)
# Below codes are for button press handling
btn1.clicked.connect(self.digitClicked)
btn2.clicked.connect(self.digitClicked)
btn3.clicked.connect(self.digitClicked)
btn4.clicked.connect(self.digitClicked)
btn5.clicked.connect(self.digitClicked)
btn6.clicked.connect(self.digitClicked)
btn7.clicked.connect(self.digitClicked)
btn8.clicked.connect(self.digitClicked)
btn9.clicked.connect(self.digitClicked)
btn0.clicked.connect(self.digitClicked)
btnDot.clicked.connect(self.digitClicked)
btnBK.clicked.connect(self.digitClicked)
btnUp.clicked.connect(self.selectUp)
btnDwn.clicked.connect(self.selectDown)
btnEnt.clicked.connect(self.selected)
# btnClr.clicked.connect(self.digitClicked)
def selectUp(self):
print "up pressed"
def selectDown(self):
print "down pressed"
def selected(self):
print "selected"
def initText(self):
""" This portion initializes the Display of the UI, which is in black and green color """
global topTxt, midTxt, backTxt, midTxtTab
topTxt = QtGui.QTextEdit("", self)
topTxt.setFixedWidth(350)
topTxt.setFixedHeight(30)
topTxt.setReadOnly(True)
topTxt.setStyleSheet('QTextEdit {background-color: #8b8989; color: #000000;}')
topTxt.move(50, 50)
topTxt.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
topTxt.setFontPointSize(10)
topTxt.setFontWeight (100)
topTxt.setAlignment(QtCore.Qt.AlignCenter)
topTxt.insertPlainText("Select Department")
midTxt = QtGui.QTextEdit("", self)
midTxt.setFixedWidth(350)
midTxt.setFixedHeight(120)
midTxt.setReadOnly(True)
midTxt.setStyleSheet('QTextEdit {background-color: #ffffff; color: #000000;}')
midTxt.move(50, 80)
midTxt.setFrameStyle(QtCore.Qt.FramelessWindowHint)
midTxt.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
midTxtTab = QtGui.QTextEdit("", self)
midTxtTab.setFixedWidth(150)
midTxtTab.setFixedHeight(120)
midTxtTab.setReadOnly(True)
midTxtTab.setStyleSheet('QTextEdit {background-color: #ffffff; color: #000000;}')
midTxtTab.move(105, 80)
midTxtTab.setFrameStyle(QtCore.Qt.FramelessWindowHint)
midTxtTab.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
midTxtTab.setFontPointSize(10)
midTxtTab.setAlignment(QtCore.Qt.AlignCenter)
midTxtTab.insertPlainText("\n\naaaaaa\n"
"bbbbbbb\n"
"cccccc\n"
"ddddddd\n")
midTxtTab.setDisabled(True)
backTxt = QtGui.QTextEdit("", self)
backTxt.setFixedWidth(55)
backTxt.setFixedHeight(30)
backTxt.setReadOnly(True)
backTxt.setStyleSheet('QTextEdit {background-color: #87cefa; color: white;}')
backTxt.move(50, 50)
backTxt.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
backTxt.setFontPointSize(10)
backTxt.setAlignment(QtCore.Qt.AlignCenter)
backTxt.insertPlainText("< Back")
def showUI(self):
""" everything initialized , now just show it """
self.statusBar()
self.setGeometry(300, 300, 800, 300)
self.setWindowTitle('trial')
self.show()
def digitClicked(self):
print"here"
global topTxt, midTxt, backTxt, midTxtTab
midTxtTab.clear()
sender = self.sender()
self.sigTextButtonClicked.emit(sender.text())
def midTxtInsert(self, txt,font, algmt):
""" UI is split to three region, this is mid part which is in green """
global topTxt, midTxt, endTxt
midTxt.setFontPointSize(font)
if algmt.upper() == "C":
midTxt.setAlignment(QtCore.Qt.AlignCenter)
elif algmt.upper() == "R":
midTxt.setAlignment(QtCore.Qt.AlignRight)
else:
midTxt.setAlignment(QtCore.Qt.AlignLeft)
midTxt.insertPlainText(txt)
self.update()
def topTxtInsert(self, txt, font, algmt):
""" UI is split to three region, this is top part which is in black """
global topTxt, midTxt, endTxt
topTxt.setFontPointSize(font)
if algmt.upper() == "C":
topTxt.setAlignment(QtCore.Qt.AlignCenter)
elif algmt.upper() == "R":
topTxt.setAlignment(QtCore.Qt.AlignRight)
else:
topTxt.setAlignment(QtCore.Qt.AlignLeft)
topTxt.insertPlainText(txt)
self.update()
def main():
""" Function main """
app = QtGui.QApplication(sys.argv)
ex = trial()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
答案 0 :(得分：3)
可以通过，
来完成 def selectDown(self):
global topTxt, midTxt, backTxt, midTxtTab, list_
print "down pressed"
global blkNum
cursor = midTxtTab.textCursor()
cursor.movePosition(QtGui.QTextCursor.Start)
# cursor.movePosition(QtGui.QTextCursor.Down)
tmp = cursor.blockFormat()
tmp.setBackground(QtGui.QBrush(QtCore.Qt.yellow))
cursor.setBlockFormat(tmp)