【发布时间】：2017-02-02 21:49:33
【问题描述】：
我得到了这个小 mcve 代码：
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_())
有几个问题我不知道如何解决：
- 每次更改值时，我的滑块小部件都会更改小部件宽度，我尝试了
addStrecht(1)，但它没有按我的预期工作，因为小部件之间有太多空白空间（即：布局排列 -> 滑块|拉伸|标签) - 一旦我在 QScintilla 小部件上键入数值，FloatSlider 小部件就会出现，这绝对是我不想要的。我希望它仅在我用鼠标左键或任何其他组合（即：ctrl+left_mouse）按下此类数值时出现
- 我不知道如何实时正确替换 QScintilla 文本（正则表达式匹配）。理想情况下，应该只修改与 QScintilla 匹配的文本，例如，我不想替换整个文本，因为视觉效果会非常令人毛骨悚然
感觉为这些小疑问打开 3 个不同的问题是没问题的，所以我决定将它们收集在同一个线程中。希望没问题
【问题讨论】：
-
您将这些称为“小问题”的事实让我怀疑您严重低估了这项任务的复杂性。在第二个要点上 - 您绝对确实希望滑块保持可见。如果您尝试使用khan academy example，您会注意到该小工具在您键入时仍然可见。这就是所有自动完成程序、呼叫提示等的工作方式。我不想让你气馁，但要让这个工作正常进行需要很多的努力——尤其是键盘处理。
标签： python python-3.x pyqt qscintilla