Dark theme

See #15

lineprofilergui/gui.py

@@ -16,6 +16,7 @@
 from .utils import translate as _, MONOSPACE_FONT, ICONS, PIXMAPS
 from .process import KernprofRun
 from . import __version__
+from .theme import update_theme
 
 LINE_PROFILER_GUI_GITHUB_URL = "https://github.com/Nodd/lineprofilergui"
 LINE_PROFILER_DOC_URL = "https://github.com/pyutils/line_profiler#id2"
@@ -153,6 +154,7 @@ def setup_ui(self):
         self.retranslate_ui()
         self.read_settings()
         self.set_running_state(False)
+        update_theme()
 
     def connect(self):
         self.actionCollapse_all.triggered.connect(self.resultsTreeWidget.collapseAll)
@@ -177,6 +179,7 @@ def connect(self):
         self.kernprof_run.output_text.connect(self.dockOutputWidget.append_log_text)
         self.kernprof_run.output_error.connect(self.dockOutputWidget.append_log_error)
         self.settingsDialog.accepted.connect(self.resultsTreeWidget.updateColonsVisible)
+        self.settingsDialog.accepted.connect(update_theme)
         self.historyCombo.currentIndexChanged.connect(self.load_history)
 
     def retranslate_ui(self):

lineprofilergui/settings.py

@@ -51,6 +51,17 @@ def setup_ui(self):
         self.columnsLayout.addWidget(self.checkBox_5)
         self.mainLayout.addWidget(self.columnsGroupBox)
 
+        # Theme
+        self.themeGroupBox = QtWidgets.QGroupBox(self)
+        self.themeLayout = QtWidgets.QVBoxLayout(self.themeGroupBox)
+        self.themeOS = QtWidgets.QRadioButton(self.themeGroupBox)
+        self.themeLayout.addWidget(self.themeOS)
+        self.themeLight = QtWidgets.QRadioButton(self.themeGroupBox)
+        self.themeLayout.addWidget(self.themeLight)
+        self.themeDark = QtWidgets.QRadioButton(self.themeGroupBox)
+        self.themeLayout.addWidget(self.themeDark)
+        self.mainLayout.addWidget(self.themeGroupBox)
+
         # Button box
         self.buttonBox = QtWidgets.QDialogButtonBox(self)
         self.buttonBox.setOrientation(QtCore.Qt.Horizontal)
@@ -87,6 +98,11 @@ def retranslate_ui(self):
         self.checkBox_4.setText(_("Per Hit (ms)"))
         self.checkBox_5.setText(_("% Time"))
 
+        self.themeGroupBox.setTitle(_("GUI theme"))
+        self.themeOS.setText(_("OS setting"))
+        self.themeLight.setText(_("Light"))
+        self.themeDark.setText(_("Dark"))
+
     @QtCore.Slot()
     def accept(self):
         settings = QtCore.QSettings()
@@ -95,6 +111,13 @@ def accept(self):
         settings.setValue("column3Visible", self.checkBox_3.isChecked())
         settings.setValue("column4Visible", self.checkBox_4.isChecked())
         settings.setValue("column5Visible", self.checkBox_5.isChecked())
+        if self.themeOS.isChecked():
+            theme = "os"
+        elif self.themeLight.isChecked():
+            theme = "light"
+        elif self.themeDark.isChecked():
+            theme = "dark"
+        settings.setValue("theme", theme)
         QtWidgets.QDialog.accept(self)
 
     @QtCore.Slot()
@@ -105,4 +128,11 @@ def reject(self):
         self.checkBox_3.setChecked(settings.value("column3Visible", True, bool))
         self.checkBox_4.setChecked(settings.value("column4Visible", True, bool))
         self.checkBox_5.setChecked(settings.value("column5Visible", True, bool))
+        theme = settings.value("theme", "os", str)
+        if theme == "light":
+            self.themeLight.setChecked(True)
+        elif theme == "dark":
+            self.themeDark.setChecked(True)
+        else:
+            self.themeOS.setChecked(True)
         QtWidgets.QDialog.reject(self)

lineprofilergui/theme.py

@@ -0,0 +1,77 @@
+import os
+
+from qtpy import QtCore, QtGui, QtWidgets
+from qtpy.QtCore import Qt
+
+
+def apply_dark_theme():
+    # taken from https://stackoverflow.com/questions/15035767/is-the-qt-5-dark-fusion-theme-available-for-windows
+
+    QtWidgets.QApplication.setStyle("Fusion")
+
+    # Now use a palette to switch to dark colors: 2A82DA
+    gray25 = QtGui.QColor(25, 25, 25)
+    gray35 = QtGui.QColor(35, 35, 35)
+    gray53 = QtGui.QColor(53, 53, 53)
+    grayblue = QtGui.QColor(42, 130, 218)
+    dark_palette = QtGui.QPalette()
+    dark_palette.setColor(QtGui.QPalette.Window, gray53)
+    dark_palette.setColor(QtGui.QPalette.WindowText, Qt.white)
+    dark_palette.setColor(QtGui.QPalette.Base, gray35)
+    dark_palette.setColor(QtGui.QPalette.AlternateBase, gray53)
+    dark_palette.setColor(QtGui.QPalette.ToolTipBase, gray25)
+    dark_palette.setColor(QtGui.QPalette.ToolTipText, Qt.white)
+    dark_palette.setColor(QtGui.QPalette.Text, Qt.white)
+    dark_palette.setColor(QtGui.QPalette.Button, gray53)
+    dark_palette.setColor(QtGui.QPalette.ButtonText, Qt.white)
+    dark_palette.setColor(QtGui.QPalette.BrightText, Qt.red)
+    dark_palette.setColor(QtGui.QPalette.Link, grayblue)
+    dark_palette.setColor(QtGui.QPalette.Highlight, grayblue)
+    dark_palette.setColor(QtGui.QPalette.HighlightedText, gray35)
+    dark_palette.setColor(QtGui.QPalette.Active, QtGui.QPalette.Button, gray53)
+    dark_palette.setColor(
+        QtGui.QPalette.Disabled, QtGui.QPalette.ButtonText, Qt.darkGray
+    )
+    dark_palette.setColor(
+        QtGui.QPalette.Disabled, QtGui.QPalette.WindowText, Qt.darkGray
+    )
+    dark_palette.setColor(QtGui.QPalette.Disabled, QtGui.QPalette.Text, Qt.darkGray)
+    dark_palette.setColor(QtGui.QPalette.Disabled, QtGui.QPalette.Light, gray53)
+    QtWidgets.QApplication.setPalette(dark_palette)
+
+
+def apply_default_theme():
+    styles = QtWidgets.QStyleFactory.keys()
+    if "WindowsVista" in styles:
+        style = "WindowsVista"
+    else:
+        style = "Fusion"
+    QtWidgets.QApplication.setPalette(QtWidgets.QApplication.style().standardPalette())
+    QtWidgets.QApplication.setStyle(style)
+
+
+def is_windows_dark_theme():
+    """Detect Windows theme"""
+    # From https://successfulsoftware.net/2021/03/31/how-to-add-a-dark-theme-to-your-qt-application/
+    settings = QtCore.QSettings(
+        "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Themes\\Personalize",
+        QtCore.QSettings.NativeFormat,
+    )
+    return settings.value("AppsUseLightTheme", 1) == 0
+
+
+def update_theme():
+    settings = QtCore.QSettings()
+    theme = settings.value("theme", "os", str)
+
+    if theme not in ("light", "dark"):
+        if os.name == "nt":
+            theme = "dark" if is_windows_dark_theme() else "light"
+        else:
+            # TODO: Check on mac and linux ?
+            theme = "light"
+
+    if theme == "light":
+        apply_default_theme()
+    elif theme == "dark":
+        apply_dark_theme()