Group and port highlight effect

Draw highlight outline, for if outline is empty (Qt.NoPen), highlight entire background.
TODO: Do we need full bg/fg/outline hover-highlighting support?

src/patchcanvas.py

@@ -1663,9 +1663,11 @@ class CanvasPort(QGraphicsItem):
         self.m_last_selected_state = False
 
         self.m_mouse_down = False
+        self.m_mouse_over = False
         self.m_cursor_moving = False
 
         self.setFlags(QGraphicsItem.ItemIsSelectable)
+        self.setAcceptHoverEvents(True)
 
     def getPortId(self):
         return self.m_port_id
@@ -1713,6 +1715,14 @@ class CanvasPort(QGraphicsItem):
     def type(self):
         return CanvasPortType
 
+    def hoverEnterEvent(self, event):
+        self.m_mouse_over = True
+        QGraphicsItem.hoverEnterEvent(self, event)
+
+    def hoverLeaveEvent(self, event):
+        self.m_mouse_over = False
+        QGraphicsItem.hoverLeaveEvent(self, event)
+
     def mousePressEvent(self, event):
         self.m_hover_item = None
         self.m_mouse_down = bool(event.button() == Qt.LeftButton)
@@ -1964,6 +1974,15 @@ class CanvasPort(QGraphicsItem):
 
         painter.setPen(poly_pen)
         painter.drawPath(path)
+        if self.m_mouse_over and canvas.theme.port_hover:
+            if poly_pen.style() == Qt.NoPen:
+                painter.setBrush(canvas.theme.port_hover)
+            else:
+                pen = QPen(poly_pen)
+                pen.setColor(canvas.theme.port_hover)
+                painter.setPen(pen)
+                painter.setBrush(Qt.NoBrush)
+            painter.drawPath(path)
 
         painter.setPen(text_pen)
         painter.setFont(self.m_port_font)
@@ -2022,6 +2041,7 @@ class CanvasBox(QGraphicsItem):
         self.m_cursor_moving = False
         self.m_forced_split = False
         self.m_mouse_down = False
+        self.m_mouse_over = False
 
         self.m_port_list_ids = []
         self.m_connection_lines = []
@@ -2046,6 +2066,7 @@ class CanvasBox(QGraphicsItem):
 
         # Final touches
         self.setFlags(QGraphicsItem.ItemIsMovable | QGraphicsItem.ItemIsSelectable)
+        self.setAcceptHoverEvents(True)
 
         # Wait for at least 1 port
         if options.auto_hide_groups:
@@ -2435,6 +2456,14 @@ class CanvasBox(QGraphicsItem):
 
         event.accept()
 
+    def hoverEnterEvent(self, event):
+        self.m_mouse_over = True
+        QGraphicsItem.hoverEnterEvent(self, event)
+
+    def hoverLeaveEvent(self, event):
+        self.m_mouse_over = False
+        QGraphicsItem.hoverLeaveEvent(self, event)
+
     def mousePressEvent(self, event):
         canvas.last_z_value += 1
         self.setZValue(canvas.last_z_value)
@@ -2504,7 +2533,16 @@ class CanvasBox(QGraphicsItem):
             painter.setBrush(canvas.theme.box_bg_1)
 
         rect.adjust(line_width / 2, line_width / 2, -line_width / 2, -line_width / 2)
-        painter.drawRoundedRect(rect, rounding, rounding)
+        path = QPainterPath()
+        path.addRoundedRect(rect, rounding, rounding)
+
+        painter.drawPath(path)
+        if self.m_mouse_over and canvas.theme.box_hover:
+            pen = QPen(canvas.theme.box_pen)
+            pen.setColor(canvas.theme.box_hover)
+            painter.setPen(pen)
+            painter.setBrush(Qt.NoBrush)
+            painter.drawPath(path)
 
         # Draw pixmap header
         rect.setHeight(canvas.theme.box_header_height)

src/patchcanvas_theme.py

@@ -75,6 +75,7 @@ class Theme(object):
             self.box_bg_1 = QColor(32, 34, 35)
             self.box_bg_2 = QColor(43, 47, 48)
             self.box_shadow = QColor(89, 89, 89, 180)
+            self.box_hover = QColor(255, 255, 255, 60)
             self.box_header_pixmap  = None
             self.box_header_height  = 24
             self.box_header_spacing = 0
@@ -91,6 +92,7 @@ class Theme(object):
 
             # Ports
             self.port_text = QPen(QColor(250, 250, 250, 180), 0)
+            self.port_hover = QColor(255, 255, 255, 80)
             self.port_bg_pixmap = None
             self.port_font_name = "Deja Vu Sans"
             self.port_font_size = 8
@@ -169,6 +171,7 @@ class Theme(object):
             self.box_bg_1 = QColor(32, 34, 35)
             self.box_bg_2 = QColor(43, 47, 48)
             self.box_shadow = QColor(89, 89, 89, 180)
+            self.box_hover = QColor(255, 255, 255, 60)
             self.box_header_pixmap  = None
             self.box_header_height  = 14
             self.box_header_spacing = 0
@@ -185,6 +188,7 @@ class Theme(object):
 
             # Ports
             self.port_text = QPen(QColor(250, 250, 250, 220), 0)
+            self.port_hover = QColor(255, 255, 255, 80)
             self.port_bg_pixmap = None
             self.port_font_name = "Deja Vu Sans"
             self.port_font_size = 6
@@ -263,6 +267,7 @@ class Theme(object):
             self.box_bg_1 = QColor(220, 220, 220)
             self.box_bg_2 = self.box_bg_1.darker(120)
             self.box_shadow = QColor(1, 1, 1, 100)
+            self.box_hover = QColor(0, 0, 0, 60)
             self.box_header_pixmap  = None
             self.box_header_height  = 24
             self.box_header_spacing = 0
@@ -279,6 +284,7 @@ class Theme(object):
 
             # Ports
             self.port_text = QPen(QColor(255, 255, 255, 220), 1)
+            self.port_hover = QColor(0, 0, 0, 255)
             self.port_bg_pixmap = None
             self.port_font_name = "Ubuntu"
             self.port_font_size = 9
@@ -368,6 +374,7 @@ class Theme(object):
             self.box_bg_1 = QColor(30, 34, 36)
             self.box_bg_2 = QColor(30, 34, 36)
             self.box_shadow = QColor(89, 89, 89, 180)
+            self.box_hover = QColor(255, 255, 255, 60)
             self.box_header_pixmap  = None
             self.box_header_height  = 19
             self.box_header_spacing = 0
@@ -384,6 +391,7 @@ class Theme(object):
 
             # Ports
             self.port_text = QPen(QColor(250, 250, 250), 0)
+            self.port_hover = QColor(255, 255, 255, 40)
             self.port_bg_pixmap = None
             self.port_font_name = "Sans"
             self.port_font_size = 8
@@ -452,6 +460,7 @@ class Theme(object):
             self.box_bg_1 = QColor(30, 34, 36)
             self.box_bg_2 = QColor(30, 34, 36)
             self.box_shadow = QColor(89, 89, 89, 180)
+            self.box_hover = QColor(255, 255, 255, 60)
             self.box_header_pixmap  = None
             self.box_header_height  = 19
             self.box_header_spacing = 0
@@ -468,6 +477,7 @@ class Theme(object):
 
             # Ports
             self.port_text = QPen(QColor(250, 250, 250), 0)
+            self.port_hover = QColor(255, 255, 255, 80)
             self.port_bg_pixmap = None
             self.port_font_name = "Sans"
             self.port_font_size = 8
@@ -539,6 +549,7 @@ class Theme(object):
             self.box_bg_1 = QColor(46, 46, 46)
             self.box_bg_2 = QColor(23, 23, 23)
             self.box_shadow = QColor(89, 89, 89, 180)
+            self.box_hover = QColor(255, 255, 255, 60)
             self.box_header_pixmap  = QPixmap(":/bitmaps/canvas/frame_node_header.png")
             self.box_header_height  = 22
             self.box_header_spacing = 6
@@ -558,6 +569,7 @@ class Theme(object):
             selPortBG = QColor(23, 23, 23)
 
             self.port_text = QPen(QColor(155, 155, 155), 0)
+            self.port_hover = QColor(255, 255, 255, 80)
             self.port_bg_pixmap = QPixmap(":/bitmaps/canvas/frame_port_bg.png")
             self.port_font_name = "Deja Vu Sans"
             self.port_font_size = 8
@@ -615,6 +627,7 @@ class Theme(object):
             self.rubberband_pen = QPen(QColor(1, 230, 238), 2, Qt.SolidLine)
             self.rubberband_brush = QColor(90, 90, 90, 100)
 
+        # Font-dependant port height
         port_font = QFont(self.port_font_name, self.port_font_size, self.port_font_state)
         self.port_height = QFontMetrics(port_font).height() + 2 * self.port_text_padding