gui/experiments: add custom color themes for experiment windows

Signed-off-by: Florian Agbuya <[email protected]>

artiq/dashboard/experiments.py

@@ -28,6 +28,7 @@ class _ArgumentEditor(EntryTreeWidget):
     def __init__(self, manager, dock, expurl):
         self.manager = manager
         self.expurl = expurl
+        self.dock = dock
 
         EntryTreeWidget.__init__(self)
 
@@ -78,6 +79,25 @@ async def _recompute_argument(self, name):
         argument["desc"] = procdesc
         argument["state"] = state
         self.update_argument(name, argument)
+        self.reapply_theme()
+
+    def reapply_theme(self):
+        palette, color = self.dock.get_current_theme()
+        self.apply_theme(palette, color)
+
+    def apply_theme(self, palette, color):
+        self.setPalette(palette)
+        for child in self.findChildren(QtWidgets.QWidget):
+            child.setPalette(palette)
+            child.setAutoFillBackground(True)
+        for i in range(self.topLevelItemCount()):
+            self._set_item_color(self.topLevelItem(i), color)
+
+    def _set_item_color(self, item, color):
+        for col in range(item.columnCount()):
+            item.setBackground(col, QtGui.QBrush() if color is None else QtGui.QColor(color))
+        for child_index in range(item.childCount()):
+            self._set_item_color(item.child(child_index), color)
 
     # Hooks that allow user-supplied argument editors to react to imminent user
     # actions. Here, we always keep the manager-stored submission arguments
@@ -303,14 +323,66 @@ async def _recompute_arguments_task(self, overrides=dict()):
         self.argeditor = editor_class(self.manager, self, self.expurl)
         self.layout.addWidget(self.argeditor, 0, 0, 1, 5)
         self.argeditor.restore_state(argeditor_state)
+        self.argeditor.reapply_theme()
 
     def contextMenuEvent(self, event):
         menu = QtWidgets.QMenu(self)
+        select_theme = menu.addAction("Select color theme")
+        reset_theme = menu.addAction("Reset to default theme")
+        menu.addSeparator()
         reset_sched = menu.addAction("Reset scheduler settings")
         action = menu.exec(self.mapToGlobal(event.pos()))
-        if action == reset_sched:
+        if action == select_theme:
+            self.select_theme()
+        elif action == reset_theme:
+            self.reset_theme()
+        elif action == reset_sched:
             asyncio.ensure_future(self._recompute_sched_options_task())
 
+    def select_theme(self):
+        color = QtWidgets.QColorDialog.getColor()
+        if color.isValid():
+            self.set_theme(color.name())
+            self.manager.set_theme(self.expurl, color.name())
+
+    def set_theme(self, color):
+        palette = self.modify_theme_palette(color)
+        self.setPalette(palette)
+        self.argeditor.apply_theme(palette, color)
+
+    def modify_theme_palette(self, color):
+        if color is None:
+            return QtWidgets.QApplication.palette()
+        palette = self.palette()
+        qcolor = QtGui.QColor(color)
+        palette.setColor(QtGui.QPalette.ColorRole.Window, qcolor)
+        palette.setColor(QtGui.QPalette.ColorRole.Highlight, qcolor)
+        palette.setColor(QtGui.QPalette.ColorRole.Base, qcolor)
+        palette.setColor(QtGui.QPalette.ColorRole.Button, qcolor)
+        luminance = (0.299 * qcolor.red() + 0.587 * qcolor.green() + 0.114 * qcolor.blue()) / 255
+        text_color = QtGui.QColor(0, 0, 0) if luminance > 0.5 else QtGui.QColor(255, 255, 255)
+        palette.setColor(QtGui.QPalette.ColorRole.WindowText, text_color)
+        palette.setColor(QtGui.QPalette.ColorRole.Text, text_color)
+        palette.setColor(QtGui.QPalette.ColorRole.ButtonText, text_color)
+        palette.setColor(QtGui.QPalette.ColorRole.PlaceholderText, text_color)
+        return palette
+
+    def get_current_theme(self):
+        color = self.manager.get_theme(self.expurl)
+        palette = self.modify_theme_palette(color)
+        return palette, color
+
+    def apply_theme(self):
+        color = self.manager.get_theme(self.expurl)
+        if color:
+            self.set_theme(color)
+        else:
+            self.set_theme(None)
+
+    def reset_theme(self):
+        self.set_theme(None)
+        self.manager.set_theme(self.expurl, None)
+
     async def _recompute_sched_options_task(self):
         try:
             expdesc, _ = await self.manager.compute_expdesc(self.expurl)
@@ -457,6 +529,7 @@ def __init__(self, main_window, dataset_sub,
         self.submission_options = dict()
         self.submission_arguments = dict()
         self.argument_ui_names = dict()
+        self.themes = dict()
 
         self.datasets = dict()
         dataset_sub.add_setmodel_callback(self.set_dataset_model)
@@ -483,6 +556,12 @@ def set_explist_model(self, model):
     def set_schedule_model(self, model):
         self.schedule = model.backing_store
 
+    def get_theme(self, expurl):
+        return self.themes.get(expurl)
+
+    def set_theme(self, expurl, color):
+        self.themes[expurl] = color
+
     def resolve_expurl(self, expurl):
         if expurl[:5] == "repo:":
             expinfo = self.explist[expurl[5:]]
@@ -592,6 +671,7 @@ def open_experiment(self, expurl):
         self.open_experiments[expurl] = dock
         dock.setAttribute(QtCore.Qt.WidgetAttribute.WA_DeleteOnClose)
         self.main_window.centralWidget().addSubWindow(dock)
+        dock.apply_theme()
         dock.show()
         dock.sigClosed.connect(partial(self.on_dock_closed, expurl))
         if expurl in self.dock_states:
@@ -708,7 +788,8 @@ def save_state(self):
             "arguments": self.submission_arguments,
             "docks": self.dock_states,
             "argument_uis": self.argument_ui_names,
-            "open_docks": set(self.open_experiments.keys())
+            "open_docks": set(self.open_experiments.keys()),
+            "themes": self.themes
         }
 
     def restore_state(self, state):
@@ -719,6 +800,7 @@ def restore_state(self, state):
         self.submission_options = state["options"]
         self.submission_arguments = state["arguments"]
         self.argument_ui_names = state.get("argument_uis", {})
+        self.themes = state.get("themes", {})
         for expurl in state["open_docks"]:
             self.open_experiment(expurl)