Implement file search

Clear found files list on clear button pressed

Make found files header bold

Enable clearing of search box with button click

Add tool tip to search box

Filter data sets on pressing Enter

Add function to filter directories

Closes #10 (closed)

sohstationviewer/view/ui/main_ui.py

@@ -77,6 +77,15 @@ class UIMainWindow(object):
         """
         self.plotting_widget: Union[SOHWidget, None] = None
         """
+        search_line_edit: textbox for user to search in
+            self.open_file_list
+        """
+        self.search_line_edit: Union[QLineEdit, None] = None
+        """
+        clear_button: clear search_line_edit 
+        """
+        self.clear_search_action: Optional[QAction] = None
+        """
         open_files_list: Widget that display the list of directories in
             current directory for user to select
         """
@@ -87,15 +96,6 @@ class UIMainWindow(object):
         """
         self.from_data_card_check_box: Union[QCheckBox, None] = None
         """
-        search_line_edit: textbox for user to search in
-            self.open_file_list
-        """
-        self.search_line_edit: Union[QLineEdit, None] = None
-        """
-        clear_button: clear search_line_edit 
-        """
-        self.clear_search_action: Optional[QAction] = None
-        """
         replot_button: reset plotting without re-loading data
         """
         self.replot_button: Union[QPushButton, None] = None
@@ -368,14 +368,6 @@ class UIMainWindow(object):
         """
         self.open_files_list = QListWidget(
             self.central_widget)
-        left_layout.addWidget(self.open_files_list, 1)
-        pal = self.open_files_list.palette()
-        pal.setColor(QtGui.QPalette.Highlight, QtGui.QColor(128, 255, 128))
-        pal.setColor(QtGui.QPalette.HighlightedText, QtGui.QColor(0, 0, 0))
-        self.open_files_list.setPalette(pal)
-        # allow multiple-line selection
-        self.open_files_list.setSelectionMode(
-            QAbstractItemView.ExtendedSelection)
 
         search_layout = QHBoxLayout()
         left_layout.addLayout(search_layout)
@@ -383,7 +375,8 @@ class UIMainWindow(object):
         self.search_line_edit.setPlaceholderText('Search...')
         self.search_line_edit.setToolTip('Filter the list of files based on '
                                          'the content.')
-        self.search_line_edit.textChanged.connect(self.main_window.filter_folder_list)
+        self.search_line_edit.textChanged.connect(
+            self.main_window.filter_folder_list)
         self.search_line_edit.setClearButtonEnabled(True)
         try:
             # This value was obtained from the C++ source of QT. We use it here
@@ -398,13 +391,22 @@ class UIMainWindow(object):
             )
         except IndexError:
             # If the name of the clear button is changed in the C++ source of
-            # QT, nothing will be found. So, we raise an error to indicate this
+            # QT, nothing will be found. We raise an error to indicate this
             # problem.
             raise ValueError('No clear button could be found. Check its '
                              'objectName attribute using QObject.findChildren '
                              'without a name.')
         search_layout.addWidget(self.search_line_edit)
 
+        left_layout.addWidget(self.open_files_list, 1)
+        pal = self.open_files_list.palette()
+        pal.setColor(QtGui.QPalette.Highlight, QtGui.QColor(128, 255, 128))
+        pal.setColor(QtGui.QPalette.HighlightedText, QtGui.QColor(0, 0, 0))
+        self.open_files_list.setPalette(pal)
+        # allow multiple-line selection
+        self.open_files_list.setSelectionMode(
+            QAbstractItemView.ExtendedSelection)
+
         read_option_grid = QGridLayout()
         left_layout.addLayout(read_option_grid)
         self.from_data_card_check_box = QCheckBox(