wip

orangecanvas/application/application.py

@@ -14,6 +14,7 @@
 from AnyQt.QtCore import (
     Qt, QUrl, QEvent, QSettings, QLibraryInfo, pyqtSignal as Signal
 )
+from PyQt5.QtGui import QFont, QPalette
 
 from orangecanvas.utils.after_exit import run_after_exit
 from orangecanvas.utils.asyncutils import get_event_loop
@@ -117,6 +118,12 @@ def __init__(self, argv):
                 sh.setShowShortcutsInContextMenus(True)
         self.configureStyle()
 
+        if sys.platform != 'darwin':
+            font = QFont('Titillium Web',
+                         self.font().pointSize(),
+                         self.font().weight())
+            self.setFont(font)
+
     def event(self, event):
         if event.type() == QEvent.FileOpen:
             self.fileOpenRequest.emit(event.url())

orangecanvas/application/widgettoolbox.py

@@ -25,7 +25,7 @@
 from ..gui.toolbox import ToolBox
 from ..gui.toolgrid import ToolGrid
 from ..gui.quickhelp import StatusTipPromoter
-from ..gui.utils import create_gradient
+from ..gui.utils import create_gradient, foreground_for_background
 from ..registry.qt import QtWidgetRegistry
 
 
@@ -415,26 +415,7 @@ def __insertItem(self, item, index):
         self.insertItem(index, grid, text, icon, tooltip)
         button = self.tabButton(index)
 
-        # Set the 'highlight' color if applicable
-        highlight_foreground = None
-        highlight = item_background(item)
-        if highlight is None \
-                and item.data(QtWidgetRegistry.BACKGROUND_ROLE) is not None:
-            highlight = item.data(QtWidgetRegistry.BACKGROUND_ROLE)
-
-        if isinstance(highlight, QBrush) and highlight.style() != Qt.NoBrush:
-            if not highlight.gradient():
-                value = highlight.color().value()
-                gradient = create_gradient(highlight.color())
-                highlight = QBrush(gradient)
-                highlight_foreground = Qt.black if value > 128 else Qt.white
-
-        palette = button.palette()
-
-        if highlight is not None:
-            palette.setBrush(QPalette.Highlight, highlight)
-        if highlight_foreground is not None:
-            palette.setBrush(QPalette.HighlightedText, highlight_foreground)
+        palette = item.data(QtWidgetRegistry.BACKGROUND_ROLE)
         button.setPalette(palette)
 
     def __on_dataChanged(self, topLeft, bottomRight):

orangecanvas/canvas/items/__init__.py

@@ -3,7 +3,7 @@
 
 """
 
-from .nodeitem import NodeItem, NodeAnchorItem, NodeBodyItem, SHADOW_COLOR
+from .nodeitem import NodeItem, NodeAnchorItem, NodeBodyItem, DEFAULT_SHADOW_COLOR
 from .nodeitem import SourceAnchorItem, SinkAnchorItem, AnchorPoint
 from .linkitem import LinkItem, LinkCurveItem
 from .annotationitem import TextAnnotation, ArrowAnnotation

orangecanvas/canvas/items/linkitem.py

@@ -13,14 +13,14 @@
 from AnyQt.QtWidgets import (
     QGraphicsItem, QGraphicsPathItem, QGraphicsWidget,
     QGraphicsDropShadowEffect, QGraphicsSceneHoverEvent, QStyle,
-    QGraphicsSceneMouseEvent
-)
+    QGraphicsSceneMouseEvent,
+    QApplication)
 from AnyQt.QtGui import (
     QPen, QBrush, QColor, QPainterPath, QTransform, QPalette,
 )
 from AnyQt.QtCore import Qt, QPointF, QRectF, QLineF, QEvent, QPropertyAnimation, Signal, QTimer
 
-from .nodeitem import AnchorPoint, SHADOW_COLOR
+from .nodeitem import AnchorPoint, DEFAULT_SHADOW_COLOR
 from .graphicstextitem import GraphicsTextItem
 from .utils import stroke_path
 from ...registry import InputSignal, OutputSignal
@@ -52,7 +52,7 @@ def __init__(self, parent):
         self.setPen(QPen(QBrush(QColor("#9CACB4")), 2.0))
 
         self.shadow = QGraphicsDropShadowEffect(
-            blurRadius=5, color=QColor(SHADOW_COLOR),
+            blurRadius=5, color=QColor(DEFAULT_SHADOW_COLOR),
             offset=QPointF(0, 0)
         )
         self.setGraphicsEffect(self.shadow)
@@ -809,6 +809,10 @@ def __updatePen(self):
         # type: () -> None
         self.prepareGeometryChange()
         self.__boundingRect = None
+
+        app = QApplication.instance()
+        darkMode = app.property('darkMode')
+
         if self.__dynamic:
             if self.__dynamicEnabled:
                 color = QColor(0, 150, 0, 150)
@@ -818,8 +822,12 @@ def __updatePen(self):
             normal = QPen(QBrush(color), 2.0)
             hover = QPen(QBrush(color.darker(120)), 2.0)
         else:
-            normal = QPen(QBrush(QColor("#9CACB4")), 2.0)
-            hover = QPen(QBrush(QColor("#959595")), 2.0)
+            if darkMode:
+                brush = QBrush(QColor('#FFFFFF'))
+            else:
+                brush = QBrush(QColor('#878787'))
+            normal = QPen(brush, 2.0)
+            hover = QPen(brush.color().darker(105), 2.0)
 
         if self.__state & LinkItem.Empty:
             pen_style = Qt.DashLine

orangecanvas/canvas/items/nodeitem.py

@@ -33,7 +33,8 @@
 
 from .graphicspathobject import GraphicsPathObject
 from .graphicstextitem import GraphicsTextItem
-from .utils import saturated, radial_gradient
+from .utils import radial_gradient
+from ...registry.utils import default_palette, create_palette
 
 from ...scheme.node import UserMessage
 from ...registry import NAMED_COLORS, WidgetDescription, CategoryDescription, \
@@ -48,48 +49,14 @@
     # from . import LinkItem
 
 
-def create_palette(light_color, color):
-    # type: (QColor, QColor) -> QPalette
-    """
-    Return a new :class:`QPalette` from for the :class:`NodeBodyItem`.
-    """
-    palette = QPalette()
-
-    palette.setColor(QPalette.Inactive, QPalette.Light,
-                     saturated(light_color, 50))
-    palette.setColor(QPalette.Inactive, QPalette.Midlight,
-                     saturated(light_color, 90))
-    palette.setColor(QPalette.Inactive, QPalette.Button,
-                     light_color)
-
-    palette.setColor(QPalette.Active, QPalette.Light,
-                     saturated(color, 50))
-    palette.setColor(QPalette.Active, QPalette.Midlight,
-                     saturated(color, 90))
-    palette.setColor(QPalette.Active, QPalette.Button,
-                     color)
-    palette.setColor(QPalette.ButtonText, QColor("#515151"))
-    return palette
-
-
-def default_palette():
-    # type: () -> QPalette
-    """
-    Create and return a default palette for a node.
-    """
-    return create_palette(QColor(NAMED_COLORS["light-yellow"]),
-                          QColor(NAMED_COLORS["yellow"]))
-
-
 def animation_restart(animation):
     # type: (QPropertyAnimation) -> None
     if animation.state() == QPropertyAnimation.Running:
         animation.pause()
     animation.start()
 
 
-SHADOW_COLOR = "#9CACB4"
-SELECTED_SHADOW_COLOR = "#609ED7"
+DEFAULT_SHADOW_COLOR = "#9CACB4"
 
 
 class NodeBodyItem(GraphicsPathObject):
@@ -120,7 +87,7 @@ def __init__(self, parent=None):
 
         self.shadow = QGraphicsDropShadowEffect(
             blurRadius=0,
-            color=QColor(SHADOW_COLOR),
+            color=QColor(DEFAULT_SHADOW_COLOR),
             offset=QPointF(0, 0),
         )
         self.shadow.setEnabled(False)
@@ -131,7 +98,7 @@ def __init__(self, parent=None):
         # non devicePixelRatio aware.
         shadowitem = GraphicsPathObject(self, objectName="shadow-shape-item")
         shadowitem.setPen(Qt.NoPen)
-        shadowitem.setBrush(QBrush(QColor(SHADOW_COLOR).lighter()))
+        shadowitem.setBrush(QBrush(QColor(DEFAULT_SHADOW_COLOR).lighter()))
         shadowitem.setGraphicsEffect(self.shadow)
         shadowitem.setFlag(QGraphicsItem.ItemStacksBehindParent)
         self.__shadow = shadowitem
@@ -285,11 +252,7 @@ def __updateShadowState(self):
         if enabled and not self.shadow.isEnabled():
             self.shadow.setEnabled(enabled)
 
-        if self.__isSelected:
-            color = QColor(SELECTED_SHADOW_COLOR)
-        else:
-            color = QColor(SHADOW_COLOR)
-
+        color = self.palette.color(QPalette.Shadow)
         self.shadow.setColor(color)
 
         if self.__animationEnabled:
@@ -352,8 +315,10 @@ def __init__(self, parent=None):
         self.setAcceptedMouseButtons(Qt.NoButton)
         self.setRect(-3.5, -3.5, 7., 7.)
         self.setPen(QPen(Qt.NoPen))
-        self.setBrush(QBrush(QColor("#9CACB4")))
-        self.hoverBrush = QBrush(QColor("#959595"))
+
+        color = QColor("#9CACB4")
+        self.brush = QBrush(color)
+        self.hover_brush = QBrush(color.darker(115))
 
         self.__hover = False
 
@@ -378,7 +343,7 @@ def setLinkState(self, state: 'LinkItem.State'):
     def paint(self, painter, option, widget=None):
         # type: (QPainter, QStyleOptionGraphicsItem, Optional[QWidget]) -> None
         hover = self.__styleState & (QStyle.State_Selected | QStyle.State_MouseOver)
-        brush = self.hoverBrush if hover else self.brush()
+        brush = self.hover_brush if hover else self.brush
         if self.__linkState & (LinkItem.Pending | LinkItem.Invalidated):
             brush = QBrush(Qt.red)
 
@@ -639,15 +604,15 @@ def __init__(self, parent, **kwargs):
 
         self.shadow = QGraphicsDropShadowEffect(
             blurRadius=0,
-            color=QColor(SHADOW_COLOR),
+            # color=QColor(DEFAULT_SHADOW_COLOR),
             offset=QPointF(0, 0),
         )
         # self.setGraphicsEffect(self.shadow)
         self.shadow.setEnabled(False)
 
         shadowitem = GraphicsPathObject(self, objectName="shadow-shape-item")
         shadowitem.setPen(Qt.NoPen)
-        shadowitem.setBrush(QBrush(QColor(SHADOW_COLOR)))
+        # shadowitem.setBrush(QBrush(QColor(DEFAULT_SHADOW_COLOR)))
         shadowitem.setGraphicsEffect(self.shadow)
         shadowitem.setFlag(QGraphicsItem.ItemStacksBehindParent)
         self.__shadow = shadowitem
@@ -1345,6 +1310,9 @@ def __init__(self, widget_description=None, parent=None, **kwargs):
         self.outputAnchorItem.setAnchorPath(output_path)
         self.outputAnchorItem.setAnimationEnabled(self.__animationEnabled)
 
+        self.widget_palette = None
+        self.__updateAnchorBrushes()
+
         self.inputAnchorItem.hide()
         self.outputAnchorItem.hide()
 
@@ -1428,11 +1396,34 @@ def setWidgetCategory(self, desc):
         Set the widget category.
         """
         self.category_description = desc
-        if desc and desc.background:
-            background = NAMED_COLORS.get(desc.background, desc.background)
-            color = QColor(background)
-            if color.isValid():
-                self.setColor(color)
+
+        background = desc.background
+        if desc.background:
+            palette = create_palette(background)
+        else:
+            palette = default_palette()
+        self.widget_palette = palette
+        self.setPalette(palette)
+
+    def __updateAnchorBrushes(self):
+        app = QApplication.instance()
+        darkMode = app.property('darkMode')
+        if darkMode:
+            link_brush = QBrush(QColor('#FFFFFF'))
+        else:
+            link_brush = QBrush(QColor('#878787'))
+        hover_brush = QBrush(link_brush.color().darker(105))
+        con_hover_brush = QBrush(hover_brush.color().darker(105))
+
+        for anchor in (self.outputAnchorItem, self.inputAnchorItem):
+            anchor.connectedBrush = hover_brush
+            anchor.normalBrush = link_brush
+            anchor.connectedHoverBrush = con_hover_brush
+            anchor.normalHoverBrush = hover_brush
+            for point in anchor.anchorPoints():
+                point.indicator.brush = link_brush
+                point.indicator.hover_brush = hover_brush
+            anchor.update()
 
     def setIcon(self, icon):
         # type: (QIcon) -> None
@@ -1444,18 +1435,8 @@ def setIcon(self, icon):
         )
         self.icon_item.setPos(-18, -18)
 
-    def setColor(self, color, selectedColor=None):
-        # type: (QColor, Optional[QColor]) -> None
-        """
-        Set the widget color.
-        """
-        if selectedColor is None:
-            selectedColor = saturated(color, 150)
-        palette = create_palette(color, selectedColor)
-        self.shapeItem.setPalette(palette)
-
     def setTitle(self, title):
-        # type: (str) -> None
+        # type: (str) -> Nne
         """
         Set the node title. The title text is displayed at the bottom of the
         node.
@@ -1594,8 +1575,11 @@ def newInputAnchor(self, signal=None):
         if not (self.widget_description and self.widget_description.inputs):
             raise ValueError("Widget has no inputs.")
 
+        palette = self.palette()
+
         anchor = AnchorPoint(self, signal=signal)
         self.inputAnchorItem.addAnchor(anchor)
+        self.__updateAnchorBrushes()
 
         return anchor
 
@@ -1614,8 +1598,11 @@ def newOutputAnchor(self, signal=None):
         if not (self.widget_description and self.widget_description.outputs):
             raise ValueError("Widget has no outputs.")
 
+        palette = self.palette()
+
         anchor = AnchorPoint(self, signal=signal)
         self.outputAnchorItem.addAnchor(anchor)
+        self.__updateAnchorBrushes()
 
         return anchor
 
@@ -1806,8 +1793,14 @@ def itemChange(self, change, value):
 
     def __updatePalette(self):
         # type: () -> None
-        palette = self.palette()
+        if self.widget_palette:
+            palette = self.widget_palette
+        else:
+            palette = self.palette()
+
+        self.shapeItem.setPalette(palette)
         self.captionTextItem.setPalette(palette)
+        self.__updateAnchorBrushes()
 
     def __updateFont(self):
         # type: () -> None

orangecanvas/canvas/items/utils.py

@@ -12,6 +12,8 @@
 
 from AnyQt.QtWidgets import QGraphicsItem
 
+from orangecanvas.registry.utils import saturated
+
 if typing.TYPE_CHECKING:
     T = typing.TypeVar("T")
     A = typing.TypeVar("A")
@@ -93,19 +95,6 @@ def sample_path(path, num=10):
     return [path.pointAtPercent(p) for p in linspace(num)]
 
 
-def saturated(color, factor=150):
-    # type: (QColor, int) -> QColor
-    """Return a saturated color.
-    """
-    h = color.hsvHueF()
-    s = color.hsvSaturationF()
-    v = color.valueF()
-    a = color.alphaF()
-    s = factor * s / 100.0
-    s = max(min(1.0, s), 0.0)
-    return QColor.fromHsvF(h, s, v, a).convertTo(color.spec())
-
-
 def radial_gradient(color, color_light=50):
     # type: (QColor, Union[int, QColor]) -> QRadialGradient
     """