Adjust colors if dark color scheme is used

gui/qt/__init__.py

@@ -110,6 +110,7 @@ def __init__(self, config, daemon, plugins):
         self.tray.show()
         self.app.new_window_signal.connect(self.start_new_window)
         run_hook('init_qt', self)
+        ColorScheme.update_from_widget(QWidget())
 
     def build_tray_menu(self):
         # Avoid immediate GC of old menu when window closed via its action

gui/qt/address_dialog.py

@@ -57,7 +57,8 @@ def __init__(self, parent, address):
         vbox.addWidget(QLabel(_("Address:")))
         self.addr_e = ButtonsLineEdit(self.address)
         self.addr_e.addCopyButton(self.app)
-        self.addr_e.addButton(":icons/qrcode.png", self.show_qr, _("Show QR Code"))
+        icon = ":icons/qrcode_white.png" if ColorScheme.dark_scheme else ":icons/qrcode.png"
+        self.addr_e.addButton(icon, self.show_qr, _("Show QR Code"))
         self.addr_e.setReadOnly(True)
         vbox.addWidget(self.addr_e)
 

gui/qt/address_list.py

@@ -95,9 +95,9 @@ def on_update(self):
                     address_item.setData(0, Qt.UserRole, address)
                     address_item.setData(0, Qt.UserRole+1, True) # label can be edited
                     if self.wallet.is_frozen(address):
-                        address_item.setBackground(0, QColor('lightblue'))
+                        address_item.setBackground(0, ColorScheme.BLUE.as_color(True))
                     if self.wallet.is_beyond_limit(address, is_change):
-                        address_item.setBackground(0, QColor('red'))
+                        address_item.setBackground(0, ColorScheme.RED.as_color(True))
                     if is_used:
                         if not used_flag:
                             seq_item.insertChild(0, used_item)

gui/qt/main_window.py

@@ -640,7 +640,7 @@ def connect_fields(self, window, btc_e, fiat_e, fee_e):
         def edit_changed(edit):
             if edit.follows:
                 return
-            edit.setStyleSheet(BLACK_FG)
+            edit.setStyleSheet(ColorScheme.DEFAULT.as_stylesheet())
             fiat_e.is_last_edited = (edit == fiat_e)
             amount = edit.get_amount()
             rate = self.fx.exchange_rate() if self.fx else None
@@ -655,15 +655,15 @@ def edit_changed(edit):
                 if edit is fiat_e:
                     btc_e.follows = True
                     btc_e.setAmount(int(amount / Decimal(rate) * COIN))
-                    btc_e.setStyleSheet(BLUE_FG)
+                    btc_e.setStyleSheet(ColorScheme.BLUE.as_stylesheet())
                     btc_e.follows = False
                     if fee_e:
                         window.update_fee()
                 else:
                     fiat_e.follows = True
                     fiat_e.setText(self.fx.ccy_amount_str(
                         amount * Decimal(rate) / COIN, False))
-                    fiat_e.setStyleSheet(BLUE_FG)
+                    fiat_e.setStyleSheet(ColorScheme.BLUE.as_stylesheet())
                     fiat_e.follows = False
 
         btc_e.follows = False
@@ -1111,22 +1111,22 @@ def reset_max(t):
         def entry_changed():
             text = ""
             if self.not_enough_funds:
-                amt_color, fee_color = RED_FG, RED_FG
+                amt_color, fee_color = ColorScheme.RED, ColorScheme.RED
                 text = _( "Not enough funds" )
                 c, u, x = self.wallet.get_frozen_balance()
                 if c+u+x:
                     text += ' (' + self.format_amount(c+u+x).strip() + ' ' + self.base_unit() + ' ' +_("are frozen") + ')'
 
             elif self.fee_e.isModified():
-                amt_color, fee_color = BLACK_FG, BLACK_FG
+                amt_color, fee_color = ColorScheme.DEFAULT, ColorScheme.DEFAULT
             elif self.amount_e.isModified():
-                amt_color, fee_color = BLACK_FG, BLUE_FG
+                amt_color, fee_color = ColorScheme.DEFAULT, ColorScheme.BLUE
             else:
-                amt_color, fee_color = BLUE_FG, BLUE_FG
+                amt_color, fee_color = ColorScheme.BLUE, ColorScheme.BLUE
 
             self.statusBar().showMessage(text)
-            self.amount_e.setStyleSheet(amt_color)
-            self.fee_e.setStyleSheet(fee_color)
+            self.amount_e.setStyleSheet(amt_color.as_stylesheet())
+            self.fee_e.setStyleSheet(fee_color.as_stylesheet())
 
         self.amount_e.textChanged.connect(entry_changed)
         self.fee_e.textChanged.connect(entry_changed)
@@ -2311,7 +2311,7 @@ def get_pk():
             return keystore.get_private_keys(text)
 
         f = lambda: button.setEnabled(get_address() is not None and get_pk() is not None)
-        on_address = lambda text: address_e.setStyleSheet(BLACK_FG if get_address() else RED_FG)
+        on_address = lambda text: address_e.setStyleSheet((ColorScheme.DEFAULT if get_address() else ColorScheme.RED).as_stylesheet())
         keys_e.textChanged.connect(f)
         address_e.textChanged.connect(f)
         address_e.textChanged.connect(on_address)
@@ -2474,9 +2474,9 @@ def set_alias_color():
                 return
             if self.alias_info:
                 alias_addr, alias_name, validated = self.alias_info
-                alias_e.setStyleSheet(GREEN_BG if validated else RED_BG)
+                alias_e.setStyleSheet((ColorScheme.GREEN if validated else ColorScheme.RED).as_stylesheet(True))
             else:
-                alias_e.setStyleSheet(RED_BG)
+                alias_e.setStyleSheet(ColorScheme.RED.as_stylesheet(True))
         def on_alias_edit():
             alias_e.setStyleSheet("")
             alias = str(alias_e.text())
@@ -2505,7 +2505,7 @@ def on_alias_edit():
             SSL_error = None
         SSL_id_label = HelpLabel(_('SSL certificate') + ':', msg)
         SSL_id_e = QLineEdit(SSL_identity)
-        SSL_id_e.setStyleSheet(RED_BG if SSL_error else GREEN_BG if SSL_identity else '')
+        SSL_id_e.setStyleSheet((ColorScheme.RED if SSL_error else ColorScheme.GREEN).as_stylesheet(True) if SSL_identity else '')
         if SSL_error:
             SSL_id_e.setToolTip(SSL_error)
         SSL_id_e.setReadOnly(True)

gui/qt/paytoedit.py

@@ -73,10 +73,10 @@ def setFrozen(self, b):
             button.setHidden(b)
 
     def setGreen(self):
-        self.setStyleSheet(util.GREEN_BG)
+        self.setStyleSheet(util.ColorScheme.GREEN.as_stylesheet(True))
 
     def setExpired(self):
-        self.setStyleSheet(util.RED_BG)
+        self.setStyleSheet(util.ColorScheme.RED.as_stylesheet(True))
 
     def parse_address_and_amount(self, line):
         x, y = line.split(',')

gui/qt/qrtextedit.py

@@ -10,7 +10,7 @@
 from PyQt5.QtCore import *
 from PyQt5.QtWidgets import QFileDialog
 
-from .util import ButtonsTextEdit, MessageBoxMixin
+from .util import ButtonsTextEdit, MessageBoxMixin, ColorScheme
 
 
 class ShowQRTextEdit(ButtonsTextEdit):
@@ -42,7 +42,8 @@ def __init__(self, text=""):
         ButtonsTextEdit.__init__(self, text)
         self.setReadOnly(0)
         self.addButton(":icons/file.png", self.file_input, _("Read file"))
-        self.addButton(":icons/qrcode.png", self.qr_input, _("Read QR code"))
+        icon = ":icons/qrcode_white.png" if ColorScheme.dark_scheme else ":icons/qrcode.png"
+        self.addButton(icon, self.qr_input, _("Read QR code"))
         run_hook('scan_text_edit', self)
 
     def file_input(self):

gui/qt/util.py

@@ -26,11 +26,6 @@
 else:
     MONOSPACE_FONT = 'monospace'
 
-GREEN_BG = "QWidget {background-color:#80ff80;}"
-RED_BG = "QWidget {background-color:#ffcccc;}"
-RED_FG = "QWidget {color:red;}"
-BLUE_FG = "QWidget {color:blue;}"
-BLACK_FG = "QWidget {color:black;}"
 
 dialogs = []
 
@@ -602,6 +597,41 @@ def stop(self):
         self.tasks.put(None)
 
 
+class ColorSchemeItem:
+    def __init__(self, fg_color, bg_color):
+        self.colors = (fg_color, bg_color)
+
+    def _get_color(self, background):
+        return self.colors[(int(background) + int(ColorScheme.dark_scheme)) % 2]
+
+    def as_stylesheet(self, background=False):
+        css_prefix = "background-" if background else ""
+        color = self._get_color(background)
+        return "QWidget {{ {}color:{}; }}".format(css_prefix, color)
+
+    def as_color(self, background=False):
+        color = self._get_color(background)
+        return QColor(color)
+
+
+class ColorScheme:
+    dark_scheme = False
+
+    GREEN = ColorSchemeItem("#117c11", "#8af296")
+    RED = ColorSchemeItem("#7c1111", "#f18c8c")
+    BLUE = ColorSchemeItem("#123b7c", "#8cb3f2")
+    DEFAULT = ColorSchemeItem("black", "white")
+
+    @staticmethod
+    def has_dark_background(widget):
+        brightness = sum(widget.palette().color(QPalette.Background).getRgb()[0:3])
+        return brightness < (255*3/2)
+
+    @staticmethod
+    def update_from_widget(widget):
+        if ColorScheme.has_dark_background(widget):
+            ColorScheme.dark_scheme = True
+
 if __name__ == "__main__":
     app = QApplication([])
     t = WaitingDialog(None, 'testing ...', lambda: [time.sleep(1)], lambda x: QMessageBox.information(None, 'done', "done"))

gui/qt/utxo_list.py

@@ -53,7 +53,7 @@ def on_update(self):
             utxo_item.setFont(4, QFont(MONOSPACE_FONT))
             utxo_item.setData(0, Qt.UserRole, name)
             if self.wallet.is_frozen(address):
-                utxo_item.setBackground(0, QColor('lightblue'))
+                utxo_item.setBackground(0, ColorScheme.BLUE.as_color(True))
             self.addChild(utxo_item)
 
     def create_menu(self, position):

icons.qrc

@@ -23,6 +23,7 @@
     <file>icons/microphone.png</file>
     <file>icons/network.png</file>
     <file>icons/qrcode.png</file>
+    <file>icons/qrcode_white.png</file>
     <file>icons/preferences.png</file>
     <file>icons/seed.png</file>
     <file>icons/status_connected.png</file>