Fix Help Window path

Framework/Kernel/CMakeLists.txt

@@ -613,7 +613,7 @@ set(CHECK_FOR_NEW_MANTID_VERSION "${ENABLE_NETWORK_ACCESS}")
 set(ENABLE_USAGE_REPORTS "${ENABLE_NETWORK_ACCESS}")
 set(DATADIRS "")
 set(MANTIDPUBLISHER "https://upload.mantidproject.org/scriptrepository")
-set(HTML_ROOT ${CMAKE_INSTALL_PREFIX}/share/doc/html)
+set(HTML_ROOT ../share/doc/html)
 
 # For a framework-only (e.g. MPI) build some of these are not relevant and should be left empty to avoid warnings on
 # starting Mantid
@@ -644,17 +644,6 @@ mtd_install_files(
 set(TARGET_EXPORT_NAME "MantidKernelTargets")
 mtd_install_framework_lib(TARGETS Kernel INSTALL_EXPORT_FILE EXPORT_NAME ${TARGET_EXPORT_NAME})
 
-# For a local build using documentation built in the tree
-if(MANTID_FRAMEWORK_LIB STREQUAL "BUILD")
-  set(HTML_ROOT ${DOCS_BUILDDIR}/html)
-else()
-  if(PROJECT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
-    set(HTML_ROOT ${CMAKE_INSTALL_PREFIX}/share/doc/html)
-  else()
-    set(HTML_ROOT "\\${Mantid_HTML_ROOT}")
-  endif()
-endif()
-
 # location of the properties file
 if(NOT DEFINED PROPERTIES_FILE_LOCATION)
   set(PROPERTIES_FILE_LOCATION ${CMAKE_CURRENT_BINARY_DIR}/Mantid.properties.config)

qt/python/mantidqt/mantidqt/widgets/helpwindow/helpwindowview.py

@@ -17,10 +17,12 @@
     QFrame,
     QShortcut,
     QApplication,
+    QStyle,
 )
 from qtpy.QtWebEngineWidgets import QWebEngineView, QWebEngineSettings
 from qtpy.QtCore import QUrl, Qt, QEvent
 from qtpy.QtGui import QIcon, QKeySequence
+from pathlib import Path
 
 # Attempt to import QWebEnginePage in a way that works across different Qt bindings/versions
 try:
@@ -110,25 +112,25 @@ def __init__(self, presenter, interceptor=None):
         # ---------------------------------
 
         # Back
-        self.backButton.setIcon(QIcon.fromTheme("go-previous", QIcon(":/qt-project.org/styles/commonstyle/images/left-arrow-32.png")))
+        self.backButton.setIcon(self.style().standardIcon(QStyle.SP_ArrowBack))
         self.backButton.setToolTip("Go Back")
         self.backButton.clicked.connect(self.browser.back)
         self.toolbar.addWidget(self.backButton)
 
         # Forward
-        self.forwardButton.setIcon(QIcon.fromTheme("go-next", QIcon(":/qt-project.org/styles/commonstyle/images/right-arrow-32.png")))
+        self.forwardButton.setIcon(self.style().standardIcon(QStyle.SP_ArrowForward))
         self.forwardButton.setToolTip("Go Forward")
         self.forwardButton.clicked.connect(self.browser.forward)
         self.toolbar.addWidget(self.forwardButton)
 
         # Home
-        self.homeButton.setIcon(QIcon.fromTheme("go-home", QIcon(":/qt-project.org/styles/commonstyle/images/home-32.png")))
+        self.homeButton.setIcon(self.get_mantid_icon("home.png"))
         self.homeButton.setToolTip("Go to Home Page")
         self.homeButton.clicked.connect(self.on_home_clicked)
         self.toolbar.addWidget(self.homeButton)
 
         # Reload
-        self.reloadButton.setIcon(QIcon.fromTheme("view-refresh", QIcon(":/qt-project.org/styles/commonstyle/images/refresh-32.png")))
+        self.reloadButton.setIcon(self.style().standardIcon(QStyle.SP_BrowserReload))
         self.reloadButton.setToolTip("Reload Current Page")
         self.reloadButton.clicked.connect(self.browser.reload)
         self.toolbar.addWidget(self.reloadButton)
@@ -139,7 +141,7 @@ def __init__(self, presenter, interceptor=None):
 
         # Find button in toolbar
         self.findButton = QPushButton()
-        self.findButton.setIcon(QIcon.fromTheme("edit-find", QIcon(":/qt-project.org/styles/commonstyle/images/find-32.png")))
+        self.findButton.setIcon(self.get_mantid_icon("search.png"))
         self.findButton.setToolTip("Find in Page (Ctrl+F)")
         self.findButton.clicked.connect(self.show_find_toolbar)
         self.toolbar.addWidget(self.findButton)
@@ -168,6 +170,22 @@ def __init__(self, presenter, interceptor=None):
 
         QApplication.instance().installEventFilter(self)
 
+    def get_mantid_icon(self, filename):
+        """Get icon from mantid/images directory"""
+        current_file = Path(__file__).resolve()
+
+        # Find mantid root directory
+        for parent in current_file.parents:
+            if parent.name == "mantid":
+                images_dir = parent / "images"
+                icon_path = images_dir / filename
+
+                if icon_path.exists():
+                    return QIcon(str(icon_path))
+                break
+
+        return QIcon()  # Return empty if not found
+
     def setup_find_toolbar(self, parent_layout):
         """Create and setup the find toolbar widget."""
         self.find_frame = QFrame()