code import

gexync.py

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+#!/bin/env python3
+
+import gex
+
+import sys
+from PyQt4 import QtGui, QtCore
+import ini_syntax
+
+class GexIniEditor(QtGui.QMainWindow):
+    """
+    Gexync is a GEX ini file editor.
+    The editor loads the INI file through the communication interface
+    without having to mount the virtual filesystem, which is unreliable
+    on some systems.
+
+    This utility allows live editing of the UNITS.INI file.
+
+    On save, a new version is loaded with formatting and error messages
+    generated by GEX, as if the virtual config filesystem was re-mounted.
+
+    The editor does not keep GEX claimed, instead does so only when needed.
+    This allows testing of the current configuration without having to close
+    and reopen the editor.
+    """
+
+    def __init__(self, xferLambda):
+        self.xferLambda = xferLambda
+
+        self.filenum = int(sys.argv[1]) if len(sys.argv)>1 else 0
+
+        super().__init__()
+        self.initUI()
+        # TODO let user pick GEX device if multiple
+
+    def initToolbar(self):
+        icon = self.style().standardIcon(QtGui.QStyle.SP_BrowserReload)
+        loadAction = QtGui.QAction(icon, 'Reload', self)
+        loadAction.setShortcut('Ctrl+O')
+        loadAction.triggered.connect(self.gexLoad)
+
+        icon = self.style().standardIcon(QtGui.QStyle.SP_DialogSaveButton)
+        syncAction = QtGui.QAction(icon, 'Write Changes', self)
+        syncAction.setShortcut('Ctrl+S')
+        syncAction.triggered.connect(self.gexSync)
+
+        icon = self.style().standardIcon(QtGui.QStyle.SP_DialogOkButton)
+        persAction = QtGui.QAction(icon, 'Persist', self)
+        persAction.setShortcut('Ctrl+P')
+        persAction.triggered.connect(self.gexPersist)
+
+        self.toolbar = self.addToolBar('Toolbar')
+        self.toolbar.setToolButtonStyle(QtCore.Qt.ToolButtonTextBesideIcon)
+        self.toolbar.addAction(loadAction)
+        self.toolbar.addAction(syncAction)
+        self.toolbar.addSeparator()
+        self.toolbar.addAction(persAction)
+
+    def initEditor(self):
+        self.editor = QtGui.QPlainTextEdit()
+
+        # Editor background and text color
+        pal = QtGui.QPalette()
+        bgc = QtGui.QColor(0xFFFFF6)
+        pal.setColor(QtGui.QPalette.Base, bgc)
+        textc = QtGui.QColor(0x000000)
+        pal.setColor(QtGui.QPalette.Text, textc)
+        self.editor.setPalette(pal)
+        # Font
+        font = QtGui.QFont('Liberation Mono', 12)
+        font.setStyleHint(QtGui.QFont.TypeWriter)
+        self.editor.setFont(font)
+        # Initial size
+        self.highlight = ini_syntax.IniHighlighter(self.editor.document())
+
+    def initUI(self):
+        self.setWindowTitle('GEX config file editor')
+        self.initToolbar()
+        self.initEditor()
+        self.setCentralWidget(self.editor)
+        self.show()
+
+        self.gexLoad()
+
+    def gexLoad(self):
+        self.editor.setPlainText("")
+        self.editor.repaint()
+
+        client = gex.Client(self.xferLambda(), load_units=False)
+        read_ini = client.ini_read(self.filenum)
+        client.close()
+
+        self.editor.setPlainText(read_ini)
+        self.highlight.rehighlight()
+        self.setWindowTitle('GEX config file editor')
+
+    def gexSync(self):
+        new_txt = self.editor.toPlainText()
+        self.editor.setPlainText("")
+        self.editor.repaint()
+
+        client = gex.Client(self.xferLambda(), load_units=False)
+        client.ini_write(new_txt)
+        read_ini = client.ini_read(self.filenum)
+        client.close()
+
+        self.editor.setPlainText(read_ini)
+        self.highlight.rehighlight()
+        self.setWindowTitle('*GEX config file editor')
+
+    def gexPersist(self):
+        client = gex.Client(self.xferLambda(), load_units=False)
+        client.ini_persist()
+        client.close()
+        self.setWindowTitle('GEX config file editor')
+
+if __name__ == '__main__':
+    app = QtGui.QApplication(sys.argv)
+    editor = GexIniEditor(lambda: gex.TrxRawUSB())
+    # editor = GexIniEditor(lambda: gex.TrxSerialThread(port='/dev/ttyUSB1',
+    #                                                   baud=57600))
+
+    # centered resize
+    w = 800
+    h = 900
+    ss = app.desktop().availableGeometry().size()
+    editor.setGeometry(int(ss.width() / 2 - w / 2), int(ss.height() / 2 - h / 2), w, h)
+
+    sys.exit(app.exec_())

ini_syntax.py

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+# syntax.py
+
+# This is a companion file to gexync.py
+
+# based on https://wiki.python.org/moin/PyQt/Python%20syntax%20highlighting
+
+from PyQt4.QtCore import QRegExp
+from PyQt4.QtGui import QColor, QTextCharFormat, QFont, QSyntaxHighlighter
+
+def format(color, style=''):
+    """Return a QTextCharFormat with the given attributes.
+    """
+    _color = QColor()
+    _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
+
+
+# Syntax styles that can be shared by all languages
+STYLES = {
+    'operator': format('red'),
+    'string': format('magenta'),
+    'comment': format('#6C8A70', 'italic'),
+    'key': format('#008AFF'),
+    'numbers': format('brown'),
+    'section': format('black', 'bold'),
+}
+
+class IniHighlighter (QSyntaxHighlighter):
+    # Python braces
+    def __init__(self, document):
+        QSyntaxHighlighter.__init__(self, document)
+
+        rules = [
+            (r'=', 0, STYLES['operator']),
+            (r'\b[YN]\b', 0, STYLES['numbers']),
+
+            # Double-quoted string, possibly containing escape sequences
+            (r'"[^"\\]*(\\.[^"\\]*)*"', 0, STYLES['string']),
+            # Single-quoted string, possibly containing escape sequences
+            (r"'[^'\\]*(\\.[^'\\]*)*'", 0, STYLES['string']),
+
+            # Numeric literals
+            (r'\b[+-]?[0-9]+\b', 0, STYLES['numbers']),
+            (r'\b[+-]?0[xX][0-9A-Fa-f]+\b', 0, STYLES['numbers']),
+            (r'\b[+-]?[0-9]+(?:\.[0-9]+)?(?:[eE][+-]?[0-9]+)?\b', 0, STYLES['numbers']),
+
+            # From '#' until a newline
+            (r'#[^\n]*', 0, STYLES['comment']),
+
+            (r'^\[.+\]', 0, STYLES['section']),
+
+            (r'^[a-zA-Z0-9_-]+\s?=', 0, STYLES['key']),
+        ]
+
+        # Build a QRegExp for each pattern
+        self.rules = [(QRegExp(pat), index, fmt)
+            for (pat, index, fmt) in rules]
+
+    def highlightBlock(self, text):
+        """Apply syntax highlighting to the given block of text.
+        """
+        # Do other syntax formatting
+        for expression, nth, format in self.rules:
+            index = expression.indexIn(text, 0)
+
+            while index >= 0:
+                # We actually want the index of the nth match
+                index = expression.pos(nth)
+                length = len(expression.cap(nth))
+                self.setFormat(index, length, format)
+                index = expression.indexIn(text, index + length)
+
+        self.setCurrentBlockState(0)