Implement themes

.gitignore

@@ -6,3 +6,4 @@ wav_converter.py
 *.txt
 icons_imgs
 TestData
+themes/.current_theme

audio_player.py

@@ -3,9 +3,9 @@ import sys
 from pydub import AudioSegment
 from pygame import mixer
 from PyQt5.QtCore import QTimer, QTimer, pyqtSlot, QObject
-import qtawesome as qta
 
 from utilities import Constants
+import qtawesome as qta
 
 
 class AudioPlayer(QObject): # Maybe useless inheriting from QObject
@@ -17,7 +17,7 @@ class AudioPlayer(QObject): # Maybe useless inheriting from QObject
 
     __time_step = 500 # Milliseconds.
 
-    def __init__(self, play, pause, stop, volume, audio_progress):
+    def __init__(self, play, pause, stop, volume, audio_progress, active_color, inactive_color):
         super().__init__()
         self.__paused = False
         self.__first_call = True
@@ -33,18 +33,21 @@ class AudioPlayer(QObject): # Maybe useless inheriting from QObject
         self.__pause.clicked.connect(self.__pause_audio)
         self.__stop.clicked.connect(self.__stop_audio)
         self.__volume.valueChanged.connect(self.__set_volume)
-        self.__play.setIcon(qta.icon('fa5.play-circle',
-                                   color = "#4facf1",
-                                   color_disabled = '#7a7a7a'))
         self.__play.setIconSize(self.__play.size())
-        self.__pause.setIcon(qta.icon('fa5.pause-circle',
-                                    color = "#4facf1",
-                                    color_disabled = '#7a7a7a'))
         self.__pause.setIconSize(self.__pause.size())
-        self.__stop.setIcon(qta.icon('fa5.stop-circle',
-                                   color = "#4facf1",
-                                   color_disabled = '#7a7a7a'))
         self.__stop.setIconSize(self.__stop.size())
+        self.refresh_btns_colors(active_color, inactive_color)
+
+    def refresh_btns_colors(self, active_color, inactive_color):
+        self.__play.setIcon(qta.icon('fa5.play-circle',
+                                     color = active_color,
+                                     color_disabled = inactive_color))
+        self.__pause.setIcon(qta.icon('fa5.pause-circle',
+                                      color = active_color,
+                                      color_disabled = inactive_color))
+        self.__stop.setIcon(qta.icon('fa5.stop-circle',
+                                     color = active_color,
+                                     color_disabled = inactive_color))
 
     @pyqtSlot()
     def __set_volume(self):

download_db_window.ui

@@ -14,33 +14,7 @@
    <string>Download database</string>
   </property>
   <property name="styleSheet">
-   <string notr="true">QWidget {
-	background-color: #464646
-}
-
-QLabel {
-	color: #ffffff;
-}
-
-QProgressBar {
-    border: 2px #7a7a7a;
-	border-radius: 5px;
-	background-color:  #7a7a7a;
-}
-
-QProgressBar::chunk {
-	background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 #1d5eff, stop:0.5 #4177ff, stop:1 #1d5eff);
-	border-radius: 5px;
-}
-
-
-QMessageBox {
-	color: #ffffff;
-}
-
-QPushButton {
-	color: #ffffff;
-}</string>
+   <string notr="true"/>
   </property>
   <layout class="QVBoxLayout" name="verticalLayout">
    <property name="sizeConstraint">
@@ -73,6 +47,9 @@ Please wait</string>
      <property name="value">
       <number>-1</number>
      </property>
+     <property name="textVisible">
+      <bool>false</bool>
+     </property>
     </widget>
    </item>
    <item>
@@ -83,13 +60,7 @@ Please wait</string>
       </font>
      </property>
      <property name="styleSheet">
-      <string notr="true">QPushButton {
-	background-color: rgb(52,52,52);
-	color: #FFFFFF;
-	border: 1px solid gray;
-	border-radius: 8px;
-}
-</string>
+      <string notr="true"/>
      </property>
      <property name="text">
       <string>Cancel</string>

main.py

@@ -1,5 +1,6 @@
 from collections import namedtuple
 from functools import partial
+from glob import glob
 import webbrowser
 import os
 import sys
@@ -7,12 +8,13 @@ import sys
 from pandas import read_csv
 from PyQt5.QtWidgets import (QMainWindow,
                              QApplication,
+                             QAction,
                              QMessageBox,
                              qApp,
                              QDesktopWidget,
                              QListWidgetItem,
                              QTreeView,
-                             QTreeWidgetItem)
+                             QTreeWidgetItem,)
 from PyQt5.QtGui import QPixmap
 from PyQt5 import uic
 from PyQt5.QtCore import (QFileInfo, 
@@ -24,7 +26,12 @@ from audio_player import AudioPlayer
 
 from double_text_button import DoubleTextButton
 from download_window import DownloadWindow
-from utilities import Constants, reset_apply_remove_btn
+
+
+from utilities import (Constants, 
+                       reset_apply_remove_btn, 
+                       throwable_message,
+                       is_valid_html_color,)
 
 qt_creator_file = "main_window.ui"
 Ui_MainWindow, _ = uic.loadUiType(qt_creator_file)
@@ -42,6 +49,8 @@ class MyApp(QMainWindow, Ui_MainWindow):
         self.current_signal_name = ''
         self.signal_names = []
         self.total_signals = 0
+        self.active_color = Constants.ACTIVE_COLOR
+        self.inactive_color = Constants.INACTIVE_COLOR
 
         # Manage frequency filters.
         self.frequency_filters_btns = (
@@ -301,6 +310,13 @@ class MyApp(QMainWindow, Ui_MainWindow):
         self.reset_location_filters_btn.clicked.connect(self.reset_location_filters)
         self.locations_list.itemClicked.connect(self.remove_if_unselected_location)
 
+        # Find available themes.
+        self.default_images_folder = os.path.join(Constants.THEMES_FOLDER,
+                                         Constants.DEFAULT_THEME,
+                                         Constants.ICONS_FOLDER)
+        # self.find_themes()
+        # self.set_theme()
+
 # ##########################################################################################
 
         self.load_db()
@@ -309,16 +325,15 @@ class MyApp(QMainWindow, Ui_MainWindow):
         self.search_bar.textChanged.connect(self.display_signals)
         self.result_list.addItems(self.signal_names)
         self.result_list.currentItemChanged.connect(self.display_specs)
-        self.result_list.itemDoubleClicked.connect(lambda: self.main_tab.setCurrentWidget(
-                                                               self.signal_properties_tab
-                                                           )
-                                                  )                    
+        self.result_list.itemDoubleClicked.connect(lambda: self.main_tab.setCurrentWidget(self.signal_properties_tab))                    
         self.display_signals()
         self.audio_widget = AudioPlayer(self.play, 
                                         self.pause, 
                                         self.stop, 
                                         self.volume, 
-                                        self.audio_progress)
+                                        self.audio_progress,
+                                        self.active_color,
+                                        self.inactive_color)
 
         BandLabel = namedtuple("BandLabel", ["left", "center", "right"])
         self.band_labels = [
@@ -334,8 +349,124 @@ class MyApp(QMainWindow, Ui_MainWindow):
             BandLabel(self.shf_left, self.shf, self.shf_right),
             BandLabel(self.ehf_left, self.ehf, self.ehf_right),
         ]
+
+        self.find_themes()
+        self.set_theme()
+
         self.show()
 
+    def find_themes(self):
+        themes = []
+        for theme_folder in os.listdir(Constants.THEMES_FOLDER):
+            relative_folder = os.path.join(Constants.THEMES_FOLDER, theme_folder)
+            if os.path.isdir(os.path.abspath(relative_folder)):
+                relative_folder = os.path.join(Constants.THEMES_FOLDER, theme_folder)
+                themes.append(relative_folder)
+        for theme in themes:
+            theme_name = '&' + ' '.join(
+                map(lambda s: s.capitalize(), 
+                    os.path.basename(theme).split('-')[1].split('_')
+                )
+            )
+            new_theme = QAction(theme_name, self)
+            self.menu_themes.addAction(new_theme)
+
+            @pyqtSlot()
+            def show_new_theme(theme):
+                self.change_theme(theme)
+                self.display_specs(self.result_list.currentItem(), None)
+            new_theme.triggered.connect(partial(show_new_theme, theme))
+
+    @pyqtSlot()
+    def change_theme(self, theme_path):
+        try:
+            with open(os.path.join(
+                          theme_path, 
+                          os.path.basename(theme_path).split('-')[1] + Constants.THEME_EXTENSION)
+                     ) as stylesheet:
+                style = stylesheet.read()
+                self.setStyleSheet(style)
+                self.download_window.setStyleSheet(style)
+        except FileNotFoundError:
+            throwable_message(self, title = "Theme not found",
+                              text = f"Missing theme in {Constants.THEMES_FOLDER} folder.").show()
+        else:
+            icons_path = os.path.join(theme_path, Constants.ICONS_FOLDER)
+            default_icons_path = os.path.join(Constants.THEMES_FOLDER, Constants.DEFAULT_THEME, Constants.ICONS_FOLDER)
+
+            if os.path.exists(os.path.join(icons_path, Constants.NOT_SELECTED)) and \
+               os.path.exists(os.path.join(icons_path, Constants.NOT_AVAILABLE)):
+                self.default_images_folder = icons_path
+            else:
+                self.default_images_folder = default_icons_path
+
+            path_to_search_label = os.path.join(icons_path, Constants.SEARCH_LABEL_IMG)
+            default_search_label = os.path.join(default_icons_path, Constants.SEARCH_LABEL_IMG)
+
+            if os.path.exists(path_to_search_label):
+                self.search_label.setPixmap(QPixmap(path_to_search_label))
+                self.modulation_search_label.setPixmap(QPixmap(path_to_search_label))
+                self.location_search_label.setPixmap(QPixmap(path_to_search_label))
+            else:
+                self.search_label.setPixmap(QPixmap(default_search_label))
+                self.modulation_search_label.setPixmap(QPixmap(default_search_label))
+                self.location_search_label.setPixmap(QPixmap(default_search_label))
+            
+            self.search_label.setScaledContents(True)
+            self.modulation_search_label.setScaledContents(True)
+            self.location_search_label.setScaledContents(True)
+
+            path_to_volume_label = os.path.join(icons_path, Constants.VOLUME_LABEL_IMG)
+            default_volume_label = os.path.join(default_icons_path, Constants.VOLUME_LABEL_IMG)
+
+            if os.path.exists(path_to_volume_label):
+                self.volume_label.setPixmap(QPixmap(path_to_volume_label))
+            else:
+                self.volume_label.setPixmap(QPixmap(default_volume_label))
+
+            self.volume_label.setScaledContents(True)
+
+            path_to_colors = os.path.join(theme_path, Constants.THEME_COLORS)
+            active_color_ok = False
+            inactive_color_ok = False
+            valid_format = False
+            valid_file = False
+            if os.path.exists(path_to_colors):
+                valid_file = True
+                with open(path_to_colors, "r") as colors_file:
+                    for line in colors_file:
+                        if '=' in line:
+                            valid_format = True
+                            quality, color = line.split("=")
+                            color = color.rstrip()
+                            if quality == "active" and is_valid_html_color(color):
+                                self.active_color = color
+                                active_color_ok = True
+                            if quality == "inactive" and is_valid_html_color(color):
+                                self.inactive_color = color
+                                inactive_color_ok = True
+            
+            if not all([valid_file, valid_format, active_color_ok, inactive_color_ok]):
+                self.active_color = Constants.ACTIVE_COLOR
+                self.inactive_color = Constants.INACTIVE_COLOR
+
+            self.audio_widget.refresh_btns_colors(self.active_color, self.inactive_color)
+
+            try:
+                with open(os.path.join(Constants.THEMES_FOLDER, 
+                          Constants.CURRENT_THEME), "w") as current_theme:
+                    current_theme.write(theme_path)
+            except:
+                pass
+
+    def set_theme(self):
+        current_theme_file = os.path.join(Constants.THEMES_FOLDER, Constants.CURRENT_THEME)
+        if os.path.exists(current_theme_file):
+            with open(current_theme_file) as current_theme:
+                theme = current_theme.read()
+                if theme != Constants.DEFAULT_THEME:
+                    self.change_theme(theme)
+
     @pyqtSlot(QListWidgetItem)
     def remove_if_unselected_modulation(self, item):
         if not item.isSelected():
@@ -440,42 +571,25 @@ class MyApp(QMainWindow, Ui_MainWindow):
             self.display_signals()
 
     def load_db(self):
-        names = ["name",
-                 "inf_freq",
-                 "sup_freq",
-                 "mode",
-                 "inf_band",
-                 "sup_band",
-                 "location",
-                 "url",
-                 "description",
-                 "modulation",
-                 "category_code",
-                 "acf",]
+        names = Constants.DB_NAMES
         try:
-            self.db = read_csv(os.path.join(Constants.DATA_FOLDER, 'db.csv'), 
+            self.db = read_csv(os.path.join(Constants.DATA_FOLDER, Constants.DB_NAME), 
                                sep = '*',
                                header = None,
                                index_col = 0,
-                               dtype = {'inf_freq': str,
-                                        'sup_freq': str,
-                                        'mode': str,
-                                        'inf_band': str,
-                                        'sup_band': str,
-                                        'category_code': str,},
+                               dtype = {name : str for name in Constants.DB_STRINGS},
                                names = names,)
         except FileNotFoundError:
             self.search_bar.setDisabled(True)
             box = QMessageBox(self)
-            box.setWindowTitle("No database")
-            box.setText("No database available.\n"
-                "Go to Updates->Update database.")
+            box.setWindowTitle(Constants.Messages.NO_DB)
+            box.setText(Constants.Messages.NO_DB_AVAIL)
             box.show()
         else:
             self.signal_names = self.db.index
             self.total_signals = len(self.signal_names)
             self.db.fillna(Constants.UNKNOWN, inplace = True)
-            self.db["url_clicked"] = False
+            self.db[Constants.DB_WIKI_CLICKED] = False
             self.update_status_tip(self.total_signals)
 
     @staticmethod
@@ -530,13 +644,13 @@ class MyApp(QMainWindow, Ui_MainWindow):
                               range_lbl):
         activate_low = False
         activate_high = False
-        color = Constants.INACTIVE_COLOR
+        color = self.inactive_color
         title = ''
         to_display = ''
         if activate_low_btn.isChecked():
             to_display += str(lower_spinbox.value()) + ' ' + lower_unit.currentText()
             activate_low = True
-            color = Constants.ACTIVE_COLOR
+            color = self.active_color
             if lower_confidence.value() != 0:
                 to_display += ' - ' + str(lower_confidence.value()) + ' %'
         else:
@@ -545,7 +659,7 @@ class MyApp(QMainWindow, Ui_MainWindow):
         if activate_up_btn.isChecked():
             to_display += str(upper_spinbox.value()) + ' ' + upper_unit.currentText()
             activate_high = True
-            color = Constants.ACTIVE_COLOR
+            color = self.active_color
             if upper_confidence.value() != 0:
                 to_display += ' + ' + str(upper_confidence.value()) + ' %'
         else:
@@ -591,7 +705,7 @@ class MyApp(QMainWindow, Ui_MainWindow):
 
     def update_status_tip(self, available_signals):
         if available_signals < self.total_signals:
-            self.statusbar.setStyleSheet(f'color: {Constants.ACTIVE_COLOR}')
+            self.statusbar.setStyleSheet(f'color: {self.active_color}')
         else:
             self.statusbar.setStyleSheet('color: #ffffff')
         self.statusbar.showMessage(f"{available_signals} out of {self.total_signals} signals displayed.")
@@ -821,21 +935,21 @@ class MyApp(QMainWindow, Ui_MainWindow):
             self.description_text.setText(current_signal.at["description"])
             for cat, cat_lab in zip(category_code, self.category_labels):
                 if cat == '0':
-                    cat_lab.setStyleSheet(f"color: {Constants.INACTIVE_COLOR};")
+                    cat_lab.setStyleSheet(f"color: {self.inactive_color};")
                 elif cat == '1':
-                    cat_lab.setStyleSheet(f"color: {Constants.ACTIVE_COLOR};")
+                    cat_lab.setStyleSheet(f"color: {self.active_color};")
             self.set_band_range(current_signal)
             self.audio_widget.set_audio_player(self.current_signal_name)
         else:
             self.url_button.setEnabled(False)
             self.url_button.setStyleSheet(f"color: {self.url_button.colors.inactive};")
             self.current_signal_name = ''
-            self.name_lab.setText("No signal")
+            self.name_lab.setText("No Signal")
             self.name_lab.setAlignment(Qt.AlignHCenter)
             for lab in self.property_labels:
                 lab.setText(Constants.UNKNOWN)
             for lab in self.category_labels:
-                lab.setStyleSheet(f"color: {Constants.INACTIVE_COLOR};")
+                lab.setStyleSheet(f"color: {self.inactive_color};")
             self.set_band_range()
             self.audio_widget.set_audio_player()
 
@@ -882,23 +996,21 @@ class MyApp(QMainWindow, Ui_MainWindow):
             return 10**9
         
     def display_spectrogram(self):
-        default_pic = os.path.join(Constants.ICONS_FOLDER, "nosignalselected.png")
+        default_pic = os.path.join(self.default_images_folder, Constants.NOT_SELECTED)
         item = self.result_list.currentItem()
         if item:
             spectrogram_name = item.text()
             path_spectr = os.path.join(Constants.DATA_FOLDER, 
                                        Constants.SPECTRA_FOLDER, 
-                                       spectrogram_name + ".png")
+                                       spectrogram_name + Constants.SPECTRA_EXT)
             if not QFileInfo(path_spectr).exists():
-                path_spectr = os.path.join(Constants.ICONS_FOLDER, 
-                                           "spectrumnotavailable.png")
+                path_spectr = os.path.join(self.default_images_folder, Constants.NOT_AVAILABLE)
         else:
             path_spectr = default_pic
         self.spectrogram.setPixmap(QPixmap(path_spectr))
 
-    @staticmethod
-    def activate_band_category(band_label, activate = True):
-        color = Constants.ACTIVE_COLOR if activate else Constants.INACTIVE_COLOR
+    def activate_band_category(self, band_label, activate = True):
+        color = self.active_color if activate else self.inactive_color
         for label in band_label:
             label.setStyleSheet(f"color: {color};")
 

themes/2-dark/dark.th

@@ -0,0 +1,239 @@
+QMenuBar {
+    color: rgb(255, 255, 255);
+}
+
+QMenuBar::item:selected {
+	background:#999999;
+	color: #1d5eff
+}
+
+QMenu::item:selected {
+    background-color: #999999;
+	color: #1d5eff
+}
+
+QMenu {
+	color: #ffffff;
+}
+
+QWidget {
+	background-color: #464646
+}
+
+QLabel {
+	color: #ffffff;
+}
+
+QPushButton {
+	color: #FFFFFF;
+	background-color: rgb(52,52,52);
+	border: 1px solid gray;
+	border-radius: 5px;
+}
+
+QPushButton:!enabled {
+	color:#9f9f9f;
+}
+
+QPushButton:checked {
+	color: #39eaff;
+}
+
+QTabWidget::pane { /* The tab widget frame */
+   /* border-left: 1px solid gray;*/
+	border: 0px;
+}
+
+
+QTabWidget::tab-bar {
+    left: 30px; /* move to the right by 5px */
+}
+
+
+/* Style the tab using the tab sub-control. Note that
+    it reads QTabBar _not_ QTabWidget */
+QTabBar::tab {
+	background: #7a7a7a;
+    border-top-left-radius: 8px;
+    border-top-right-radius: 8px;
+    min-width: 16ex;
+    padding: 2px;
+    color: #FFFFFF
+}
+
+QTabBar::tab:selected {
+	background: #999999;
+    color: #1d5eff
+}
+
+
+QTabBar::tab:!selected {
+    margin-top: 3px; /* make non-selected tabs look smaller */
+}
+
+
+
+QProgressBar {
+    border: 2px #7a7a7a;
+	border-radius: 3px;
+	background-color:  #7a7a7a;
+}
+
+QProgressBar::chunk {
+    /*background-color: #1d5eff;*/
+	background: qlineargradient(x1:0, y1:0, x2:0, y2:1, stop:0 #1d5eff, stop:0.5 #4177ff, stop:1 #1d5eff);
+	border-radius: 3px;
+}
+
+
+QAbstractScrollArea::corner {
+    background: none;
+    border: none;
+}
+
+QScrollBar:vertical, QScrollBar:horizontal{
+	background-color:#343434;
+	border-radius: 5px;
+	/*background: none;*/
+}
+
+QScrollBar:vertical {
+	margin-top: 0px;
+	margin-bottom: 0px;
+	/*width: 10px;*/
+}
+QScrollBar:horizontal{
+	margin-left: 0px;
+	margin-right: 0px;
+	/*height: 10px;*/
+}
+
+QScrollBar::handle:vertical, QScrollBar::handle:horizontal{
+	border-radius: 5px;
+	border-color: none;
+	border-width: 1px; 
+ 	background-color: #999999; 
+}
+
+QScrollBar::add-line:vertical, QScrollBar::add-line:horizontal{
+	width: 0px; 
+	height: 0px;
+}
+
+QScrollBar::sub-line:vertical, QScrollBar::sub-line:horizontal{
+	width: 0px; 
+	height: 0px;
+}
+
+QScrollBar::add-page:vertical{
+	border-left: 1px solid gray;
+	background: transparent;
+	border-radius: 5px;
+/*
+	border: 1px#343434;
+	background-color: #343434;*/
+}
+QScrollBar::add-page:horizontal{
+	border-top: 1px solid gray;
+	background: transparent;
+	border-radius: 5px;
+/*
+	border: 1px#343434;
+	background-color: #343434;*/
+}
+QScrollBar::sub-page:vertical{
+	border-left: 1px solid gray;
+	background: transparent;
+	border-radius: 5px;
+/*	border: 1px #343434;
+	background-color: #343434;*/
+}
+QScrollBar::sub-page:horizontal{
+	border-top: 1px solid gray;
+	background: transparent;
+	border-radius: 5px;
+/*	border: 1px #343434;
+	background-color: #343434;*/
+}
+
+QTextEdit{
+	color: #ffffff;
+}
+
+QMessageBox {
+	color: #ffffff;
+}
+
+QToolTip {
+	color: #000000;
+}
+
+QTextBrowser {
+	background-color: #464646;
+	color: #ffffff;
+	border: 0px;
+}
+
+QRadioButton {
+	color: #ffffff;
+}
+
+QListWidget {
+	background-color:rgb(52,52,52);
+	color: rgb(255, 255, 255);
+	border: 1px solid gray;
+	border-radius: 8px;
+}
+
+QLineEdit {
+	background-color: #343434;
+	color: rgb(255, 255, 255);
+	border: 1px solid gray;
+	border-radius: 5px;
+}
+
+QComboBox {
+	background-color: rgb(52,52,52);
+	color: #ffffff;
+    border: 1px solid gray;
+    border-radius: 5px;
+}
+
+QComboBox:!enabled {
+	color: #9f9f9f;
+}
+
+QComboBox QAbstractItemView {
+    border: 1px solid gray;
+    selection-background-color: #999999;
+	selection-color: #1d5eff;
+	color: #ffffff;
+}
+
+QSpinBox {
+	background-color: rgb(52,52,52);
+	color: #ffffff;
+	border: 1px solid gray;
+	border-radius: 5px;
+}
+
+QSpinBox:!enabled {
+	color:#9f9f9f;
+}
+
+/* SPECIAL WIDGETS */
+QPushButton#url_button {
+	color: #9f9f9f;
+	border: 0px;
+	background-color: #464646;
+}
+
+QPushButton#play, QPushButton#pause, QPushButton#stop {
+	color: #464646;
+	border: 0px;
+	background-color: #464646;
+}
+
+QLabel#band_range_lbl {
+	color: #9f9f9f;
+}

themes/3-material_design/material_design.th

@@ -0,0 +1,410 @@
+/*****************************************************************************
+MainWindow
+*****************************************************************************/
+QWidget:window {
+	border: 0px solid #2e2f34;
+	background-color: #2e2f34;
+}
+
+/*****************************************************************************
+Search bar
+*****************************************************************************/
+QLineEdit {
+	background-color: transparent;
+	border: 0px solid transparent;
+	border-bottom: 2px solid #669900;
+	color:  #669900;
+}
+
+/*****************************************************************************
+Scroll Bars
+*****************************************************************************/
+QScrollBar:horizontal {
+	background: transparent;			/* Background where slider is not */
+	height: 10px;
+	margin: 0;
+}
+
+QScrollBar:vertical {
+	background: transparent;			/* Background where slider is not */
+	width: 10px;
+	margin: 0;
+}
+
+QScrollBar::handle:horizontal {
+    background: #37474F;					/* Slider color */
+    min-width: 16px;
+	border-radius: 5px;
+}
+
+QScrollBar::handle:vertical {
+    background: #37474F;					/* Slider color */
+    min-height: 16px;
+	border-radius: 5px;
+}
+
+QScrollBar::add-page:horizontal, QScrollBar::sub-page:horizontal,
+QScrollBar::add-page:vertical, QScrollBar::sub-page:vertical {
+	background: none;												/* Removes the dotted background */
+}
+
+QScrollBar::add-line:horizontal, QScrollBar::sub-line:horizontal,
+QScrollBar::add-line:vertical, QScrollBar::sub-line:vertical {	/* Hides the slider arrows */
+      border: none;
+      background: none;
+}
+
+/*****************************************************************************
+List
+*****************************************************************************/
+QListWidget {
+	background-color: transparent;
+	border: 0px solid transparent;
+	border-bottom: 2px solid #80CBC4;
+	color: #c2cfd6;
+}
+
+QListView::item:hover {
+	color: #669900;
+	background: transparent;
+}
+
+QListView::item:selected {
+	color: #88cc00;
+	background: transparent;
+}
+
+QListView {
+	background-color: transparent;
+	color: #c2cfd6;
+	outline: 0;
+	border: 0px solid transparent;
+}
+
+/* === QTabBar === */
+QTabBar {
+	background: transparent;
+}
+
+QTabWidget::pane {
+	background: transparent;	/* Only at the very bottom of the tabs */
+}
+
+QTabBar::tab {
+	background: transparent;
+	border: 0px solid transparent;
+	border-bottom: 2px solid transparent;
+	color: #546E7A;
+	padding-left: 10px;
+	padding-right: 10px;
+	padding-top: 3px;
+	padding-bottom: 3px;
+}
+
+QTabBar::tab:hover {
+	background-color: transparent;
+	border: 0px solid transparent;
+	border-bottom: 2px solid #88cc00;
+	color: #AFBDC4;
+}
+
+QTabBar::tab:selected {
+	background-color: transparent;
+	border: 0px solid transparent;
+	border-top: none;
+	border-bottom: 2px solid #88cc00;
+	color: #FFFFFF;
+}
+
+QStackedWidget {
+	background: #2e2f34;/* This covers a bunch of things, I was thinking about making it transparent, */
+							/* but I would have to find all the other elements... but QTabWidget::pane may be it */
+}
+
+/* ==================== Dialog ==================== */
+QLabel {
+	background: transparent;
+	color: #CFD8DC;				/* Not sure about this one */
+}
+
+QDialog {
+	background-color: #263238;
+	color: #546E7A;
+	outline: 0;
+	border: 2px solid transparent;
+}
+
+/*****************************************************************************
+Buttons
+*****************************************************************************/
+
+QToolTip {
+	background-color: #80CBC4;
+	color: black;
+    padding: 5px;
+    border-radius: 0;
+    opacity: 200;
+}
+
+QPushButton {
+	background-color: transparent;
+	color: #c2cfd6;
+	border: 1px solid transparent;
+	padding: 4px 22px;
+}
+
+QPushButton:hover {
+	border-left: 2px solid #88cc00;
+    border-right: 2px solid #88cc00;
+	color: #f0f3f5;
+}
+
+QPushButton:pressed {
+	color: #efffcc;
+}
+
+QPushButton:disabled {
+	color:#546E7A;
+}
+
+QPushButton:checked {
+	color: #88cc00;
+}
+
+/*****************************************************************************
+Rich Text Box
+*****************************************************************************/
+QTextBrowser {
+	background: transparent;
+	border: 0px solid transparent;
+	color: #546E7A;
+}
+
+/*****************************************************************************
+Main Menu (Upper part)
+*****************************************************************************/
+QTreeView {
+	background-color: #263238;
+}
+
+QMenu {
+	background-color: #263238;		/* File Menu Background color */
+	color: #546E7A;
+}
+
+QMenu::item:selected {
+	color: #AFBDC4;
+}
+
+QMenu::item:pressed {
+	color: #FFFFFF;
+}
+
+QMenu::separator {
+	height: 1px;
+	background: transparent;			/* Could change this to #546E7A and reduce the margin top and bottom to 1px */
+	margin-left: 10px;
+	margin-right: 10px;
+	margin-top: 5px;
+	margin-bottom: 5px;
+}
+
+/*****************************************************************************
+Main Menu (Bar)
+*****************************************************************************/
+QMenuBar {
+	background-color: transparent;
+	color: #546E7A;
+}
+
+QMenuBar::item {
+	background: transparent;
+}
+
+QMenuBar::item:disabled {
+	color: gray;
+}
+
+QMenuBar::item:selected {
+	color: #AFBDC4;
+}
+
+QMenuBar::item:pressed {
+	color: #FFFFFF;
+}
+
+QToolBar {
+	background: transparent;
+	border: 1px solid transparent;
+}
+
+QToolBar:handle {
+	background: transparent;
+	border-left: 2px dotted #80CBC4;	/* Fix the 4 handle dots so it doesn't look crappy */
+	color: transparent;
+}
+
+QToolBar::separator {
+	border: 0;
+}
+
+/*****************************************************************************
+ComboBox
+*****************************************************************************/
+QComboBox {
+    border: 0px solid gray;
+    border-radius: 2px;
+    padding: 1px 6px 1px 6px;
+    min-width: 2em;
+}
+
+QComboBox:!editable, QComboBox::drop-down:editable {
+    color: #c2cfd6;
+    selection-color: #80CBC4;
+	background-color: transparent;
+	selection-background-color: transparent;
+}
+
+QComboBox:disabled {
+    color: #546E7A;
+}
+
+/* QComboBox gets the "on" state when the popup is open */
+QComboBox:!editable:on, 
+QComboBox::drop-down:editable:on {
+	color: #c2cfd6;
+	background-color: transparent;
+	selection-background-color: transparent;
+}
+
+QComboBox:on { /* shift the text when the popup opens */
+    padding-top: 3px;
+    padding-left: 4px;
+}
+
+QComboBox::drop-down {
+	background-color:  transparent;
+    subcontrol-origin: padding;
+    subcontrol-position: top right;
+    width: 20px;
+    border-top-right-radius: 2px; 
+    border-bottom-right-radius: 2px;
+}
+
+QComboBox::down-arrow:enabled {
+    image: url("./themes/3-material_design/icons/down-arrow.png");
+}
+
+QComboBox::down-arrow:disabled {
+    image: url("./themes/3-material_design/icons/down-arrow_off.png");
+}
+
+QComboBox::down-arrow:hover {
+    image: url("./themes/3-material_design/icons/down-arrow_hover.png");
+}
+
+QComboBox::down-arrow:on { /* shift the arrow when popup is open */
+    top: 1px;
+    left: 1px;
+}
+
+QComboBox QAbstractItemView {
+background-color: #2e2f34;
+}
+
+/*****************************************************************************
+RadioButton
+*****************************************************************************/
+
+QRadioButton{
+    color: #c2cfd6;
+}
+
+QRadioButton:disabled{
+    color: #546E7A;
+}
+
+QRadioButton::indicator{
+    width: 50px;
+    height: 50px;
+}
+
+QRadioButton::indicator::unchecked {
+    image: url("./themes/3-material_design/icons/off.png");
+}
+
+QRadioButton::indicator:unchecked:hover {
+    image: url("./themes/3-material_design/icons/off_press.png");
+}
+
+QRadioButton::indicator:unchecked:pressed {
+    image: url("./themes/3-material_design/icons/off_press.png");
+}
+
+QRadioButton::indicator::checked {
+    image: url("./themes/3-material_design/icons/on.png");
+}
+
+QRadioButton::indicator:checked:hover {
+    image: url("./themes/3-material_design/icons/on_press.png");
+}
+
+QRadioButton::indicator:checked:pressed {
+    image: url("./themes/3-material_design/icons/on_press.png");
+}
+
+/*****************************************************************************
+SpinBox
+*****************************************************************************/
+QSpinBox {
+    color: #c2cfd6;
+    border-width: 0px;
+    background: transparent;
+}
+
+QSpinBox:disabled {
+    color: #546E7A;
+    border-width: 0px;
+    background: transparent;
+}
+
+QSpinBox::up-button {
+    subcontrol-origin: border;
+    subcontrol-position: top right;
+    width: 16px;
+    image: url("./themes/3-material_design/icons/up-arrow.png");
+    border-width: 0px;
+}
+
+QSpinBox::up-button:hover {
+    image: url("./themes/3-material_design/icons/up-arrow_hover.png");
+}
+
+QSpinBox::up-button:pressed {
+    image: url("./themes/3-material_design/icons/up-arrow.png");
+}
+
+QSpinBox::up-button:disabled {
+    image: url("./themes/3-material_design/icons/up-arrow_off.png");
+}
+
+QSpinBox::down-button {
+    subcontrol-origin: border;
+    subcontrol-position: bottom right; /* position at bottom right corner */
+    width: 16px;
+    image: url("./themes/3-material_design/icons/down-arrow.png");
+    border-width: 0px;
+    border-top-width: 0;
+}
+
+QSpinBox::down-button:hover {
+    image: url("./themes/3-material_design/icons/down-arrow_hover.png");
+}
+
+QSpinBox::down-button:pressed {
+    image: url("./themes/3-material_design/icons/down-arrow.png");
+}
+
+QSpinBox::down-button:disabled {
+    image: url("./themes/3-material_design/icons/down-arrow_off.png");
+}

utilities.py

@@ -1,37 +1,70 @@
 from collections import namedtuple
 import hashlib
+import re
 from pandas import read_csv
 
-class _ReadOnlyProperty(object):
-    def __init__(self, value):
-        self.__value = value
+from PyQt5.QtWidgets import QMessageBox
 
-    def __get__(self, obj, objtype):
-        return self.__value
-
-    def __set__(self, obj, value):
-        return NotImplementedError("Cannot change a constant.")
-
-    # def change_hardcoded_value(self, value):
+# class _ReadOnlyProperty(object):
+#     def __init__(self, value):
 #         self.__value = value
     
-def __make_read_only(cls):
-    for k, v in cls.__dict__.items():
-        if not callable(getattr(cls, k)) and '__' not in k:
-            setattr(cls, k, _ReadOnlyProperty(v))
-    # def raise_err(self, attr, value):
-    #     raise NotImplementedError("Cannot add an attribute.")
-    # setattr(cls, '__setattr__', raise_err)
-    return cls
+#     def __get__(self, obj, objtype):
+#         return self.__value
 
-@__make_read_only
-class __Constants(object):
+#     def __set__(self, obj, value):
+#         return NotImplementedError("Cannot change a constant.")
+
+# def __make_read_only(cls):
+#     for k, v in cls.__dict__.items():
+#         if not callable(getattr(cls, k)) and '__' not in k:
+#             setattr(cls, k, _ReadOnlyProperty(v))
+#     # def raise_err(self, attr, value):
+#     #     raise NotImplementedError("Cannot add an attribute.")
+#     # setattr(cls, '__setattr__', raise_err)
+#     return cls
+
+# @__make_read_only
+class Constants(object):
+    class Messages(object):
+        NO_DB_AVAIL    = "No database available.\nGo to Updates->Update database."
+        NO_DB          = "No database"
     DB_LOCATION        = "https://aresvalley.com/Storage/Artemis/Database/data.zip"
     REF_LOC            = "https://aresvalley.com/Storage/Artemis/Database/data.zip.log"
+    DB_NAME            = "db.csv"
+    DB_NAMES           = ("name",
+                          "inf_freq",
+                          "sup_freq",
+                          "mode",
+                          "inf_band",
+                          "sup_band",
+                          "location",
+                          "url",
+                          "description",
+                          "modulation",
+                          "category_code",
+                          "acf",)
+    DB_WIKI_CLICKED    = "url_clicked"
+    DB_STRINGS         = ('inf_freq',
+                          'sup_freq',
+                          'mode',
+                          'inf_band',
+                          'sup_band',
+                          'category_code',)
     DATA_FOLDER        = "Data"
     SPECTRA_FOLDER     = "Spectra"
+    SPECTRA_EXT        = ".png"
     AUDIO_FOLDER       = "Audio"
-    ICONS_FOLDER       = "icons_imgs"
+    THEMES_FOLDER      = "themes"
+    THEME_EXTENSION    = ".th"
+    ICONS_FOLDER       = "icons"
+    DEFAULT_THEME      = "1-system"
+    CURRENT_THEME      = ".current_theme"
+    THEME_COLORS       = "colors.txt"
+    NOT_AVAILABLE      = "spectrumnotavailable.png"
+    NOT_SELECTED       = "nosignalselected.png"
+    SEARCH_LABEL_IMG   = "search_icon.png"
+    VOLUME_LABEL_IMG   = "volume.png"
     __Band             = namedtuple("Band", ["lower", "upper"])
     __ELF              = __Band(0, 30) # Formally it is (3, 30) Hz.
     __SLF              = __Band(30, 300)
@@ -88,7 +121,6 @@ class __Constants(object):
                           "PSK",
                           "QAM",
                           "TDMA",)
-
     LOCATIONS          = (UNKNOWN,
                           "Australia",
                           "Canada",
@@ -121,13 +153,21 @@ class __Constants(object):
                           "World Wide",
                           "Worldwide",)
 
-Constants = __Constants()
+# Constants = __Constants()
 
 def reset_apply_remove_btn(button):
     if button.isChecked():
         button.setChecked(False)
         button.clicked.emit()
 
+def throwable_message(cls, title, text, connection = None):
+    msg = QMessageBox(cls)
+    msg.setWindowTitle(title)
+    msg.setText(text)
+    if connection:
+        msg.setText(text).finished.connect(connection)
+    return msg
+
 def checksum_ok(data, what):
     code = hashlib.sha256()
     code.update(data)
@@ -142,3 +182,6 @@ def checksum_ok(data, what):
     except HTTPError:
         return False
     return code.hexdigest() == reference
+
+def is_valid_html_color(color):
+    return bool(re.match("#([a-zA-Z0-9]){6}", color))