def __initData(self,textDocumentObj,settingsObj):
# 为了代码的可读性，将部分属性值（影响文本显示的属性值）放置到EditorSettings类中
self.__settings = settingsObj
self.settings = lambda : self.__settings
# 为了代码的可读性，将部分数据的操作（关于鼠标选中的文本）放置到EditorSettings类中
self.__selectedTextManager = SelectedTextManager()
self.selectedTextManager = lambda : self.__selectedTextManager
self.__textDocument = textDocumentObj
self.__textDocument.setFont(self.settings().getFont(),self.settings().getFontMetrics())
self.__textCursor = TextCursor(self)
self.__textCursor.cursorPosChangedSignal.connect(self.onCursorPosChanged)
self.__textCursor.initPos( (0,0) )
self.__textCursor.setFocus(QtCore.Qt.MouseFocusReason)
self.settings().fontChangedSignal.connect(self.onFontChanged)
self.settings().startDisLineNumberChangedSignal.connect( self.onStartDisLineNumberChanged )
self.settings().startDisLetterXOffChangedSignal.connect( self.onStartDisLetterXOffChanged )
self.settings().lineTextMaxPixelChangedSignal.connect( self.onLineTextMaxPixelChanged )
self.settings().editableChangedSignal.connect( self.onEditableChanged )
self.selectedTextManager().selectedTextChangedSignal.connect( self.onSelectedTextChanged )
class BaseTextWidget(QWidget):
@staticmethod
def generateIDStrByObjAndEvent(obj,eventType):
return '%s__%s'%( str(id(obj)),str(eventType) )
# 在每次重绘的时候，该函数都将被调用，以此通知显示行号的模块(LineNumberWidget)应该显示哪些行号，显示的位置如何
visibleLineYOffInfoChangedSignal = QtCore.pyqtSignal( list )
def showLineNumberAsTop(self,lineNumber,update=True):
suitedLineNumber = FUF.calcMidNumberByRange( 0,lineNumber,self.document().getLineCount()-1 )
self.settings().setStartDisLineNumber(suitedLineNumber,update)
def showLeftXOffAsLeft(self,xOff,update=True):
self.settings().setStartDisLetterXOff( 0 if xOff < 0 else xOff,update )
def onSelectedTextChanged(self):
self.update()
def onFontChanged(self,newFontObj):
self.__textDocument.setFont(self.settings().getFont(), self.settings().getFontMetrics())
self.update()
# 当光标的位置改变时，需要刷新原来的行以及新行
def onCursorPosChanged(self):
self.update()
def onStartDisLineNumberChanged(self,curV):
self.update()
def onStartDisLetterXOffChanged(self,curV):
self.update()
def onLineTextMaxPixelChanged(self,curV):
self.update()
def onEditableChanged(self,curState):
self.update()
def onGlobalEvents(self,obj,event):
dispacherInfo = self.settings().getUserDataByKey('eventDispacherInfo',{})
func = dispacherInfo.get( BaseTextWidget.generateIDStrByObjAndEvent(obj, event.type()) )
if func != None:
return func(obj,event)
# 注册事件转换器，将obj上发生的eventType类型交给func处理
# 信息存储时的数据结构：所有信息存储在一个dict中
# key：BaseTextWidget.generateIDStrByObjAndEvent计算得到
# value：func
def regEventDispacher(self,obj,eventType,func):
dispacherInfo = self.settings().getUserDataByKey('eventDispacherInfo',{})
key = BaseTextWidget.generateIDStrByObjAndEvent(obj, eventType)
if dispacherInfo.get(key) == None:
dispacherInfo[key] = func
self.settings().setUserDataByKey( 'eventDispacherInfo',dispacherInfo )
def dispacherOnInputMethod(self,obj,event):
self.insertStr(event.commitString())
return True
def __installEventDispacher(self):
self.regEventDispacher(self, QtCore.QEvent.InputMethod, self.dispacherOnInputMethod)
self.regEventDispacher(self.__textCursor, QtCore.QEvent.InputMethod, self.dispacherOnInputMethod)
def __init__(self,textDocumentObj = None,settingsObj = None,parent=None):
QWidget.__init__(self,parent)
self.setCursor( QtCore.Qt.IBeamCursor )
textDocumentObj = TextDocument() if textDocumentObj == None else textDocumentObj
settingsObj = EditorSettings() if settingsObj == None else settingsObj
self.__initData( textDocumentObj,settingsObj )
self.__globalEventFilter = __EventFilter__( self.onGlobalEvents )
self.__installEventDispacher()
QtWidgets.qApp.installEventFilter( self.__globalEventFilter )
self.setText = self.__textDocument.setText
self.getText = self.__textDocument.getText
self.document = lambda : self.__textDocument
self.cursor = lambda : self.__textCursor
def __initData(self,textDocumentObj,settingsObj):
# 为了代码的可读性，将部分属性值（影响文本显示的属性值）放置到EditorSettings类中
self.__settings = settingsObj
self.settings = lambda : self.__settings
# 为了代码的可读性，将部分数据的操作（关于鼠标选中的文本）放置到EditorSettings类中
self.__selectedTextManager = SelectedTextManager()
self.selectedTextManager = lambda : self.__selectedTextManager
self.__textDocument = textDocumentObj
self.__textDocument.setFont(self.settings().getFont(),self.settings().getFontMetrics())
self.__textCursor = TextCursor(self)
self.__textCursor.cursorPosChangedSignal.connect(self.onCursorPosChanged)
self.__textCursor.initPos( (0,0) )
self.__textCursor.setFocus(QtCore.Qt.MouseFocusReason)
self.settings().fontChangedSignal.connect(self.onFontChanged)
self.settings().startDisLineNumberChangedSignal.connect( self.onStartDisLineNumberChanged )
self.settings().startDisLetterXOffChangedSignal.connect( self.onStartDisLetterXOffChanged )
self.settings().lineTextMaxPixelChangedSignal.connect( self.onLineTextMaxPixelChanged )
self.settings().editableChangedSignal.connect( self.onEditableChanged )
self.selectedTextManager().selectedTextChangedSignal.connect( self.onSelectedTextChanged )
# 以当前的设置为准，更新第lineIndex对应的矩形区域
def updateLineIndexRect(self,lineIndex,height):
for item in self.calcAnyVisibleYOff():
if item['lineIndex'] == lineIndex:
self.update( 0, item['lineYOff'],self.width(),height )
break
# 根据光标的全局位置，计算出当前视口下光标的实际位置，返回tuple
def transGloPixelPosToCurPixelPos(self,xyGloPixelPosTuple):
return (xyGloPixelPosTuple[0] - self.settings().getStartDisLetterXOff(), \
xyGloPixelPosTuple[1] - self.settings().getFontMetrics().lineSpacing() * self.settings().getStartDisLineNumber() )
# 根据光标在当前视口下的位置，计算出光标的全局位置，返回tuple
def transCurPixelPosToGloPixelPos(self,xyCurPixelPosTuple):
return (xyCurPixelPosTuple[0] + self.settings().getStartDisLetterXOff(), \
xyCurPixelPosTuple[1] + self.settings().getFontMetrics().lineSpacing() * self.settings().getStartDisLineNumber() )
# 根据全局的indexPos，得到全局的pixelPos
def transGloIndexPosToGloPixelPos(self,xyIndexPosTuple):
xIndexPos,yIndexPos = xyIndexPosTuple
charWidthInfoArr = self.__textDocument.getLineCharWidthArrayByIndex(yIndexPos)
yPixelPos = yIndexPos*self.settings().getFontMetrics().lineSpacing() + CEGD.TextYOff
xPixelPos = 0
for i in range(xIndexPos):
xPixelPos += CEGD.CharDistancePixel + charWidthInfoArr[i]
return (xPixelPos,yPixelPos)
# 根据用户点击的位置，计算出光标应该处于的位置
def transUserClickedPixelPosToIndexPos(self,xyClickedPixelPosTuple):
x,y = xyClickedPixelPosTuple
x = max([x,0])
lineIndex = self.settings().getStartDisLineNumber() + int((y-CEGD.TextYOff)/self.settings().getFontMetrics().lineSpacing())
lineIndex = FUF.calcMidNumberByRange(0, lineIndex, self.__textDocument.getLineCount()-1)
charWidthArray = self.__textDocument.getLineCharWidthArrayByIndex(lineIndex)
startX = 0 - self.settings().getStartDisLetterXOff()
xIndex = 0
while xIndex < len(charWidthArray):
charWidth = charWidthArray[xIndex]
startX += charWidth + CEGD.CharDistancePixel
xIndex += 1
if startX >= x:
break
if startX > x:
if ( startX - (charWidth + CEGD.CharDistancePixel)/2 > x ):
startX -= (charWidth + CEGD.CharDistancePixel)
xIndex -= 1
return RetuInfo.info( indexPos = ( xIndex,lineIndex ) , offset = x-startX )
# 计算一共可以显示多少行
def calcDisLineNumber(self):
return int((self.height()-CEGD.TextYOff) / self.settings().getFontMetrics().lineSpacing())
def calcMaxStartDisLineNumber(self):
return max([ 0,self.__textDocument.getLineCount()-1-(self.calcDisLineNumber()-1) ])
# 计算每行文本的y偏移（行号和文本的y偏移都一样）
def calcAnyVisibleYOff(self):
yOffArray = []
for i in range( self.settings().getStartDisLineNumber(),self.__textDocument.getLineCount() ):
curY = CEGD.TextYOff + self.settings().getFontMetrics().lineSpacing() * (i-self.settings().getStartDisLineNumber())
if curY > self.height():
break
yOffArray.append( {'lineIndex':i,'lineYOff':curY} )
return yOffArray
# 子类通过重写beforeDraw、afterDraw来实现对界面的修改，而不要直接重写paintEvent
# 之所以子类尽量不要重写paintEvent，是因为子类中大部分情况是为了高亮某段文本
# 如果先绘制文本，再用半透明的高亮画刷绘制高亮区域，会导致之前绘制的文本的颜色大幅度变浅，影响用户查看
# 而如果先用高亮画刷绘制高亮区域，再绘制文本即可解决上述问题
# 如果子类的绘制可以晚于文本的绘制，并不会造成不利影响，那么子类重写paintEvent也是可以的
def beforePaint(self,painter):
pass
def afterPaint(self,painter):
pass
def paintEvent(self,event):
visibleLineYOffInfoArray = self.calcAnyVisibleYOff()
self.visibleLineYOffInfoChangedSignal.emit( visibleLineYOffInfoArray )
painter = QtGui.QPainter(self)
painter.setFont(self.settings().getFont())
painter.setPen(QtCore.Qt.NoPen)
painter.setBrush(CEGD.WhiteOpaqueBrush)
painter.drawRect(0,0,self.width(),self.height())
painter.save()
self.beforePaint(painter)
painter.restore()
painter.save()
self.__drawLineText(painter,visibleLineYOffInfoArray,event.rect())
painter.restore()
painter.save()
self.__refreshCursor(painter,visibleLineYOffInfoArray)
painter.restore()
painter.save()
self.afterPaint(painter)
painter.restore()
# 绘制每行文本
def __drawLineText(self,painter,visibleLineYOffInfoArray,redrawRect):
for item in visibleLineYOffInfoArray:
lineYOff = item['lineYOff']
lineIndex = item['lineIndex']
pixmapObj = self.__textDocument.getLinePixmapByIndex(lineIndex)
if lineYOff >= redrawRect.y() and lineYOff <= redrawRect.y() + redrawRect.height():
painter.drawPixmap( - self.settings().getStartDisLetterXOff() , lineYOff , pixmapObj )
self.settings().setLineTextMaxPixel(self.__textDocument.getMaxLineWidth())
# 绘制鼠标相关
def __refreshCursor(self,painter,visibleLineYOffInfoArray):
drawCursorSign = False
for item in visibleLineYOffInfoArray:
if item['lineIndex'] == self.__textCursor.getCursorIndexPos()[1]:
drawCursorSign = True
break
if drawCursorSign == False:
self.__textCursor.hide()
return
# 绘制光标
cursorPos = self.transGloPixelPosToCurPixelPos( self.transGloIndexPosToGloPixelPos(self.__textCursor.getCursorIndexPos()) )
self.__textCursor.setGeometry(cursorPos[0],cursorPos[1],CEGD.CursorWidth,self.settings().getFontMetrics().lineSpacing())
# 绘制光标所在行高亮
if self.selectedTextManager().getSelectedTextIndexPos() == None:
lineTextRect = QtCore.QRect( 0,cursorPos[1],self.width(),self.settings().getFontMetrics().lineSpacing() )
painter.fillRect( lineTextRect ,CEGD.LineSelectedBKBrush)