Import LinuxCNC source tree

lib/python/qtvcp/widgets/web_widget.py

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+import os
+
+from qtpy.QtCore import QUrl, QFile, QUrl
+from qtpy.QtWidgets import (QWidget,QVBoxLayout,QLabel)
+from qtvcp.core import Path
+
+# Set up logging
+from qtvcp import logger
+LOG = logger.getLogger(__name__)
+PATH = Path()
+
+good = True
+try:
+    from qtpy.QtWebEngineWidgets import QWebEngineView as WebBase
+except:
+    try:
+        from qtpy.QtWebKitWidgets import QWebView as WebBase
+    except:
+        LOG.warning('WebWidget - Is python3-pyqt-QtWebEngine installed?')
+        # fail safe - mostly for designer
+        # PyQt5.QtWebEngineWidgets must be loaded before QApplication
+        # which doesn't happen in designer. Also screen won't immediately 
+        # crash if both libraries are not missing
+        WebBase = QWidget
+        good = False
+
+class WebWidget(WebBase):
+    def __init__(self, parent=None):
+        super(WebWidget, self).__init__(parent)
+
+        # bad imports - give a clue
+        if not good:
+            vbox = QVBoxLayout(self)
+            vbox.addStretch(1)
+            mess = QLabel('WebWidget Import failed')
+            vbox.addWidget(mess)
+
+    # load a HTML file, but try to fix the image path
+    def loadFile(self, path):
+        file = QFile(path)
+        file.open(QFile.ReadOnly)
+        txt = file.readAll()
+        txt = str(txt, encoding='utf8')
+        # fix sample html image path
+        if 'IMAGEDIR/' in txt:
+            txt = txt.replace('IMAGEDIR/','')
+        super().setHtml(txt,QUrl.fromLocalFile(str(PATH.IMAGEDIR+'/')))