如何正確替換QScintilla小部件上的特定匹配項？

Question

我這個小MCVE代碼：

import sys 
import re 

from PyQt5 import QtGui, QtWidgets, QtCore 
from PyQt5.QtCore import Qt 
from PyQt5.Qsci import QsciScintilla 
from PyQt5 import Qsci 


class FloatSlider(QtWidgets.QWidget): 

    value_changed = QtCore.pyqtSignal(float) 

    def __init__(self, value=0.0, parent=None): 
     super().__init__(parent) 

     self.slider = QtWidgets.QSlider(Qt.Horizontal) 
     self.label = QtWidgets.QLabel() 
     self.label.setAlignment(Qt.AlignCenter) 

     self.adjust(value) 

     layout = QtWidgets.QHBoxLayout() 
     layout.addWidget(self.slider) 
     layout.addWidget(self.label) 

     self.slider.valueChanged.connect(self.on_value_changed) 
     self.setLayout(layout) 
     self.setWindowTitle("Adjust number") 

    def adjust(self, value): 
     width = 100 # TODO: Adjust it properly depending on input value 
     self.slider.setRange(value - width, value + width) 
     self.slider.setSingleStep(1) 
     self.slider.setValue(value) 
     self.label.setText(str(float(value))) 

    def on_value_changed(self, value): 
     # vmax, vmin = self.slider.minimum(), self.slider.maximum() 
     # value = 2 * value/(vmax - vmin) 
     self.label.setText(str(float(value))) 
     self.value_changed.emit(value) 


class SimpleEditor(QsciScintilla): 

    def __init__(self, language=None, parent=None): 
     super().__init__(parent) 

     self.slider = FloatSlider(value=0.0) 
     self.slider.value_changed.connect(self.float_value_changed) 

     font = QtGui.QFont() 
     font.setFamily('Courier') 
     font.setFixedPitch(True) 
     font.setPointSize(10) 
     self.setFont(font) 
     self.setMarginsFont(font) 
     fontmetrics = QtGui.QFontMetrics(font) 
     self.setMarginsFont(font) 
     self.setMarginWidth(0, fontmetrics.width("00000") + 6) 
     self.setMarginLineNumbers(0, True) 
     self.setMarginsBackgroundColor(QtGui.QColor("#cccccc")) 
     self.setBraceMatching(QsciScintilla.SloppyBraceMatch) 
     self.setCaretLineVisible(True) 
     self.setCaretLineBackgroundColor(QtGui.QColor("#E8E8FF")) 

     if language: 
      self.lexer = getattr(Qsci, 'QsciLexer' + language)() 
      self.setLexer(self.lexer) 

     self.SendScintilla(QsciScintilla.SCI_FOLDALL, True) 
     self.setAutoCompletionThreshold(1) 
     self.setAutoCompletionSource(QsciScintilla.AcsAPIs) 
     self.setFolding(QsciScintilla.BoxedTreeFoldStyle) 

     # Signals/Slots 
     self.cursorPositionChanged.connect(self.on_cursor_position_changed) 
     self.copyAvailable.connect(self.on_copy_available) 
     self.indicatorClicked.connect(self.on_indicator_clicked) 
     self.indicatorReleased.connect(self.on_indicator_released) 
     self.linesChanged.connect(self.on_lines_changed) 
     self.marginClicked.connect(self.on_margin_clicked) 
     self.modificationAttempted.connect(self.on_modification_attempted) 
     self.modificationChanged.connect(self.on_modification_changed) 
     self.selectionChanged.connect(self.on_selection_changed) 
     self.textChanged.connect(self.on_text_changed) 
     self.userListActivated.connect(self.on_user_list_activated) 

    def float_value_changed(self, v): 
     print(v) 

    def on_cursor_position_changed(self, line, index): 
     text = self.text(line) 
     for match in re.finditer('(?:^|(?<=\W))\d+(?:\.\d+)?(?=$|\W)', text): 
      start, end = match.span() 
      if start <= index <= end: 
       pos = self.positionFromLineIndex(line, start) 
       x = self.SendScintilla(
        QsciScintilla.SCI_POINTXFROMPOSITION, 0, pos) 
       y = self.SendScintilla(
        QsciScintilla.SCI_POINTYFROMPOSITION, 0, pos) 
       point = self.mapToGlobal(QtCore.QPoint(x, y)) 
       num = float(match.group()) 
       message = 'number: %s' % num 

       self.slider.setWindowTitle('line: {0}'.format(line)) 
       self.slider.adjust(num) 
       self.slider.move(point + QtCore.QPoint(0, 20)) 
       self.slider.show() 

       break 

    def on_copy_available(self, yes): 
     print('-' * 80) 
     print("on_copy_available") 

    def on_indicator_clicked(self, line, index, state): 
     print("on_indicator_clicked") 

    def on_indicator_released(self, line, index, state): 
     print("on_indicator_released") 

    def on_lines_changed(self): 
     print("on_lines_changed") 

    def on_margin_clicked(self, margin, line, state): 
     print("on_margin_clicked") 

    def on_modification_attempted(self): 
     print("on_modification_attempted") 

    def on_modification_changed(self): 
     print("on_modification_changed") 

    def on_selection_changed(self): 
     print("on_selection_changed") 

    def on_text_changed(self): 
     print("on_text_changed") 

    def on_user_list_activated(self, id, text): 
     print("on_user_list_activated") 


def show_requirements(): 
    print(sys.version) 
    print(QtCore.QT_VERSION_STR) 
    print(QtCore.PYQT_VERSION_STR) 

if __name__ == "__main__": 
    show_requirements() 

    app = QtWidgets.QApplication(sys.argv) 

    ex = QtWidgets.QWidget() 
    hlayout = QtWidgets.QHBoxLayout() 
    ed = SimpleEditor("JavaScript") 

    hlayout.addWidget(ed) 

    ed.setText("""#ifdef GL_ES 
precision mediump float; 
#endif 

#extension GL_OES_standard_derivatives : enable 

uniform float time; 
uniform vec2 mouse; 
uniform vec2 resolution; 

void main(void) { 

    vec2 st = (gl_FragCoord.xy/resolution.xy); 
    vec2 lefbot = step(vec2(0.1), st); 
    float pct = lefbot.x*lefbot.y; 
    vec2 rigtop = step(vec2(0.1), 1.-st); 
    pct *= rigtop.x*rigtop.y; 
    vec3 color = vec3(pct); 

    gl_FragColor = vec4(color, 1.0);""") 

    ex.setLayout(hlayout) 
    ex.show() 
    ex.resize(800, 600) 

    sys.exit(app.exec_()) 

有幾個問題，我不知道如何解決：

• 我的滑塊小部件我每次更改值隨時間變化的窗口小部件的寬度，我嘗試addStrecht(1)但它沒有工作，因爲我的意圖，因爲有太多的部件之間的空白空間（即：佈局安排 - >滑塊| strecht |標籤）
• 一旦我在QScintilla小部件上鍵入一個數值，FloatSlider小部件將出現，這絕對是我不知道的想。我只希望它出現，只有當我用鼠標左鍵或任何其他組合（即：CTRL + left_mouse）按下這樣的數值時纔會出現我不知道如何正確替換QScintilla文本（正則表達式匹配）上即時的。理想的情況是隻有QScintilla匹配的文本應該修改，比如，我不想更換整個文本，因爲視覺效果將是非常讓人毛骨悚然

它不喜歡開放供這些小3個不同的問題懷疑是可以的，所以我決定把它們放在同一個線程中。希望沒關係

Answer 1

• 使用setFixedWidth人員能夠避免滑塊或對每一個變化
• 你不應該使用on_cursor_position_changed事件標籤寬度變化，而不是僅僅使用mouseReleaseEvent
• 的一個好方法，以取代在某些位置某些賽事將取代使用setText使用insertAt和SCI_DELETERANGE方法。欲瞭解更多信息，請查詢QScintilla docs

Answer 2

在第二個要點上：我想你應該放棄爲滑塊設置單獨的窗口/對話框的想法。它應該是一個彈出窗口，它保持在編輯器之上，直到您單擊它或按下轉義（即像工具提示或上下文菜單）。

爲了給你這是如何看的想法（但沒有試圖解決任何其他潛在問題），嘗試這樣的事情：

class FloatSlider(QtWidgets.QFrame):  
    value_changed = QtCore.pyqtSignal(float) 

    def __init__(self, value=0.0): 
     super().__init__() 
     ...  
     self.setFrameShape(QtWidgets.QFrame.Box) 
     self.setFrameShadow(QtWidgets.QFrame.Plain) 
     self.setParent(None, QtCore.Qt.Popup) 
     self.setFocusPolicy(QtCore.Qt.NoFocus) 

    def adjust(self, value): 
     ... 
     self.slider.setFocus()