import keyword import os import re import sys import subprocess from argparse import Namespace import pyqtgraph as pg from pyqtgraph.Qt import QtGui, QtCore, QT_LIB from collections import OrderedDict from .utils import examples path = os.path.abspath(os.path.dirname(__file__)) sys.path.insert(0, path) app = pg.mkQApp() import importlib ui_template = importlib.import_module( f'exampleLoaderTemplate_{QT_LIB.lower()}') # based on https://github.com/art1415926535/PyQt5-syntax-highlighting QRegularExpression = QtCore.QRegularExpression QFont = QtGui.QFont QColor = QtGui.QColor QTextCharFormat = QtGui.QTextCharFormat QSyntaxHighlighter = QtGui.QSyntaxHighlighter def format(color, style=''): """ Return a QTextCharFormat with the given attributes. """ _color = QColor() if type(color) is not str: _color.setRgb(color[0], color[1], color[2]) else: _color.setNamedColor(color) _format = QTextCharFormat() _format.setForeground(_color) if 'bold' in style: _format.setFontWeight(QFont.Bold) if 'italic' in style: _format.setFontItalic(True) return _format class LightThemeColors: Red = "#B71C1C" Pink = "#FCE4EC" Purple = "#4A148C" DeepPurple = "#311B92" Indigo = "#1A237E" Blue = "#0D47A1" LightBlue = "#01579B" Cyan = "#006064" Teal = "#004D40" Green = "#1B5E20" LightGreen = "#33691E" Lime = "#827717" Yellow = "#F57F17" Amber = "#FF6F00" Orange = "#E65100" DeepOrange = "#BF360C" Brown = "#3E2723" Grey = "#212121" BlueGrey = "#263238" class DarkThemeColors: Red = "#F44336" Pink = "#F48FB1" Purple = "#CE93D8" DeepPurple = "#B39DDB" Indigo = "#9FA8DA" Blue = "#90CAF9" LightBlue = "#81D4FA" Cyan = "#80DEEA" Teal = "#80CBC4" Green = "#A5D6A7" LightGreen = "#C5E1A5" Lime = "#E6EE9C" Yellow = "#FFF59D" Amber = "#FFE082" Orange = "#FFCC80" DeepOrange = "#FFAB91" Brown = "#BCAAA4" Grey = "#EEEEEE" BlueGrey = "#B0BEC5" LIGHT_STYLES = { 'keyword': format(LightThemeColors.Blue, 'bold'), 'operator': format(LightThemeColors.Red, 'bold'), 'brace': format(LightThemeColors.Purple), 'defclass': format(LightThemeColors.Indigo, 'bold'), 'string': format(LightThemeColors.Amber), 'string2': format(LightThemeColors.DeepPurple), 'comment': format(LightThemeColors.Green, 'italic'), 'self': format(LightThemeColors.Blue, 'bold'), 'numbers': format(LightThemeColors.Teal), } DARK_STYLES = { 'keyword': format(DarkThemeColors.Blue, 'bold'), 'operator': format(DarkThemeColors.Red, 'bold'), 'brace': format(DarkThemeColors.Purple), 'defclass': format(DarkThemeColors.Indigo, 'bold'), 'string': format(DarkThemeColors.Amber), 'string2': format(DarkThemeColors.DeepPurple), 'comment': format(DarkThemeColors.Green, 'italic'), 'self': format(DarkThemeColors.Blue, 'bold'), 'numbers': format(DarkThemeColors.Teal), } class PythonHighlighter(QSyntaxHighlighter): """Syntax highlighter for the Python language. """ # Python keywords keywords = keyword.kwlist # Python operators operators = [ r'=', # Comparison r'==', r'!=', r'<', r'<=', r'>', r'>=', # Arithmetic r'\+', r"-", r'\*', r'/', r'//', r'%', r'\*\*', # In-place r'\+=', r'-=', r'\*=', r'/=', r'\%=', # Bitwise r'\^', r'\|', r'&', r'~', r'>>', r'<<', ] # Python braces braces = [ r'\{', r'\}', r'\(', r'\)', r'\[', r'\]', ] def __init__(self, document): QSyntaxHighlighter.__init__(self, document) # Multi-line strings (expression, flag, style) self.tri_single = (QRegularExpression("'''"), 1, 'string2') self.tri_double = (QRegularExpression('"""'), 2, 'string2') rules = [] # Keyword, operator, and brace rules rules += [(r'\b%s\b' % w, 0, 'keyword') for w in PythonHighlighter.keywords] rules += [(o, 0, 'operator') for o in PythonHighlighter.operators] rules += [(b, 0, 'brace') for b in PythonHighlighter.braces] # All other rules rules += [ # 'self' (r'\bself\b', 0, 'self'), # 'def' followed by an identifier (r'\bdef\b\s*(\w+)', 1, 'defclass'), # 'class' followed by an identifier (r'\bclass\b\s*(\w+)', 1, 'defclass'), # Numeric literals (r'\b[+-]?[0-9]+[lL]?\b', 0, 'numbers'), (r'\b[+-]?0[xX][0-9A-Fa-f]+[lL]?\b', 0, 'numbers'), (r'\b[+-]?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?\b', 0, 'numbers'), # Double-quoted string, possibly containing escape sequences (r'"[^"\\]*(\\.[^"\\]*)*"', 0, 'string'), # Single-quoted string, possibly containing escape sequences (r"'[^'\\]*(\\.[^'\\]*)*'", 0, 'string'), # From '#' until a newline (r'#[^\n]*', 0, 'comment'), ] self.rules = rules @property def styles(self): app = QtGui.QApplication.instance() return DARK_STYLES if app.property('darkMode') else LIGHT_STYLES def highlightBlock(self, text): """Apply syntax highlighting to the given block of text. """ # Do other syntax formatting for expression, nth, format in self.rules: format = self.styles[format] for n, match in enumerate(re.finditer(expression, text)): if n < nth: continue start = match.start() length = match.end() - start self.setFormat(start, length, format) self.setCurrentBlockState(0) # Do multi-line strings in_multiline = self.match_multiline(text, *self.tri_single) if not in_multiline: in_multiline = self.match_multiline(text, *self.tri_double) def match_multiline(self, text, delimiter, in_state, style): """Do highlighting of multi-line strings. =========== ========================================================== delimiter (QRegularExpression) for triple-single-quotes or triple-double-quotes in_state (int) to represent the corresponding state changes when inside those strings. Returns True if we're still inside a multi-line string when this function is finished. style (str) representation of the kind of style to use =========== ========================================================== """ # If inside triple-single quotes, start at 0 if self.previousBlockState() == in_state: start = 0 add = 0 # Otherwise, look for the delimiter on this line else: match = delimiter.match(text) start = match.capturedStart() # Move past this match add = match.capturedLength() # As long as there's a delimiter match on this line... while start >= 0: # Look for the ending delimiter match = delimiter.match(text, start + add) end = match.capturedEnd() # Ending delimiter on this line? if end >= add: length = end - start + add + match.capturedLength() self.setCurrentBlockState(0) # No; multi-line string else: self.setCurrentBlockState(in_state) length = len(text) - start + add # Apply formatting self.setFormat(start, length, self.styles[style]) # Look for the next match match = delimiter.match(text, start + length) start = match.capturedStart() # Return True if still inside a multi-line string, False otherwise if self.currentBlockState() == in_state: return True else: return False class ExampleLoader(QtGui.QMainWindow): def __init__(self): QtGui.QMainWindow.__init__(self) self.ui = ui_template.Ui_Form() self.cw = QtGui.QWidget() self.setCentralWidget(self.cw) self.ui.setupUi(self.cw) self.setWindowTitle("PyQtGraph Examples") self.codeBtn = QtGui.QPushButton('Run Edited Code') self.codeLayout = QtGui.QGridLayout() self.ui.codeView.setLayout(self.codeLayout) self.hl = PythonHighlighter(self.ui.codeView.document()) app = QtGui.QApplication.instance() app.paletteChanged.connect(self.updateTheme) self.codeLayout.addItem(QtGui.QSpacerItem(100,100,QtGui.QSizePolicy.Expanding,QtGui.QSizePolicy.Expanding), 0, 0) self.codeLayout.addWidget(self.codeBtn, 1, 1) self.codeBtn.hide() global examples self.itemCache = [] self.populateTree(self.ui.exampleTree.invisibleRootItem(), examples) self.ui.exampleTree.expandAll() self.resize(1000,500) self.show() self.ui.splitter.setSizes([250,750]) self.ui.loadBtn.clicked.connect(self.loadFile) self.ui.exampleTree.currentItemChanged.connect(self.showFile) self.ui.exampleTree.itemDoubleClicked.connect(self.loadFile) self.ui.codeView.textChanged.connect(self.codeEdited) self.codeBtn.clicked.connect(self.runEditedCode) def simulate_black_mode(self): """ used to simulate MacOS "black mode" on other platforms intended for debug only, as it manage only the QPlainTextEdit """ # first, a dark background c = QtGui.QColor('#171717') p = self.ui.codeView.palette() p.setColor(QtGui.QPalette.Active, QtGui.QPalette.Base, c) p.setColor(QtGui.QPalette.Inactive, QtGui.QPalette.Base, c) self.ui.codeView.setPalette(p) # then, a light font f = QtGui.QTextCharFormat() f.setForeground(QtGui.QColor('white')) self.ui.codeView.setCurrentCharFormat(f) # finally, override application automatic detection app = QtGui.QApplication.instance() app.setProperty('darkMode', True) def updateTheme(self): self.hl = PythonHighlighter(self.ui.codeView.document()) def populateTree(self, root, examples): bold_font = None for key, val in examples.items(): item = QtGui.QTreeWidgetItem([key]) self.itemCache.append(item) # PyQt 4.9.6 no longer keeps references to these wrappers, # so we need to make an explicit reference or else the .file # attribute will disappear. if isinstance(val, OrderedDict): self.populateTree(item, val) elif isinstance(val, Namespace): item.file = val.filename if 'recommended' in val: if bold_font is None: bold_font = item.font(0) bold_font.setBold(True) item.setFont(0, bold_font) else: item.file = val root.addChild(item) def currentFile(self): item = self.ui.exampleTree.currentItem() if hasattr(item, 'file'): global path return os.path.join(path, item.file) return None def loadFile(self, edited=False): qtLib = str(self.ui.qtLibCombo.currentText()) env = None if qtLib != 'default': env = dict(os.environ, PYQTGRAPH_QT_LIB=qtLib) if edited: path = os.path.abspath(os.path.dirname(__file__)) proc = subprocess.Popen([sys.executable, '-'], stdin=subprocess.PIPE, cwd=path, env=env) code = str(self.ui.codeView.toPlainText()).encode('UTF-8') proc.stdin.write(code) proc.stdin.close() else: fn = self.currentFile() if fn is None: return subprocess.Popen([sys.executable, fn], env=env) def showFile(self): fn = self.currentFile() if fn is None: self.ui.codeView.clear() return if os.path.isdir(fn): fn = os.path.join(fn, '__main__.py') with open(fn, "r") as currentFile: text = currentFile.read() self.ui.codeView.setPlainText(text) self.ui.loadedFileLabel.setText(fn) self.codeBtn.hide() def codeEdited(self): self.codeBtn.show() def runEditedCode(self): self.loadFile(edited=True) def main(): app = pg.mkQApp() loader = ExampleLoader() pg.exec() if __name__ == '__main__': main()