GUI: camera_image.py added BEAMLINE BUSY message when beamline is in use. ALso change colour of the beam centre mark

gui/src/aaregui/widgets/camera_image.py

@@ -65,6 +65,11 @@ class SampleCameraImageLabel(QGraphicsView):
         self.__raster_mgr = raster
         self.__state = SampleCameraImageState.IDLE
         self.__sam_cam = SampleCameraSettings(exposure=0.1, gain=100.0)
+        self.__is_daq_busy = False
+
+        self.__busy_blink_timer = QTimer()
+        self.__busy_blink_timer.timeout.connect(self.__toggle_busy_blink)
+        self.__busy_blink_visible = True
 
         self.__geom = geom
         self.__bookmarks: SmargonBookmarkList = SmargonBookmarkList()
@@ -107,11 +112,71 @@ class SampleCameraImageLabel(QGraphicsView):
         self.left_click_hold_threshold = 200
         self.right_click_hold_threshold = 200
 
+    def __toggle_busy_blink(self):
+        """Toggle visibility for blinking busy text."""
+        self.__busy_blink_visible = not self.__busy_blink_visible
+        self.update()
+
+    def __draw_busy_overlay(self, painter: QPainter, rect):
+        """Draw 'BEAMLINE BUSY' text overlay when DAQ is in busy state."""
+        if not self.__is_daq_busy:
+            return
+
+        if not self.__busy_blink_visible:
+            return
+
+        # Save the current painter state
+        painter.save()
+
+        # Set up the text properties
+        font = painter.font()
+        font.setPointSize(24)
+        font.setBold(True)
+        painter.setFont(font)
+
+        # Create a semi-transparent background
+        painter.setPen(QPen(QColor(255, 255, 255, 200), 2, Qt.PenStyle.SolidLine))
+        painter.setBrush(QColor(255, 0, 0, 150))  # Semi-transparent red background
+
+        text = "BEAMLINE BUSY"
+
+        # Calculate text dimensions
+        font_metrics = painter.fontMetrics()
+        text_rect = font_metrics.boundingRect(text)
+
+        # Position the text in the center of the view
+        view_rect = self.viewport().rect()
+        scene_center = self.mapToScene(view_rect.center())
+
+        # Create a rectangle for the background
+        padding = 20
+        bg_rect = QRect(
+            int(scene_center.x() - text_rect.width() / 2 - padding),
+            int(scene_center.y() - text_rect.height() / 2 - padding),
+            text_rect.width() + 2 * padding,
+            text_rect.height() + 2 * padding
+        )
+
+        # Draw the background rectangle
+        painter.drawRoundedRect(bg_rect, 10, 10)
+
+        # Draw the text
+        painter.setPen(QPen(QColor(255, 255, 255), 2, Qt.PenStyle.SolidLine))
+        text_pos = QPoint(
+            int(scene_center.x() - text_rect.width() / 2),
+            int(scene_center.y() + text_rect.height() / 4)
+        )
+        painter.drawText(text_pos, text)
+
+        # Restore the painter state
+        painter.restore()
+
     def drawForeground(self, painter, rect):
         self.__draw_ml_bounding_box(painter)
         self.__draw_beam_center(painter)
         self.__raster_mgr.draw_grid(painter, self.__raster_alpha)
         self.__draw_helical(painter)
+        self.__draw_busy_overlay(painter, rect)
 
     def resizeEvent(self, event):
         super().resizeEvent(event)
@@ -317,11 +382,22 @@ class SampleCameraImageLabel(QGraphicsView):
         self.__sam_cam = s.bl.sample_camera
         self.__bounding_box = s.box
 
+        self.__is_daq_busy = s.busy
+
+        if self.__is_daq_busy:
+            if not self.__busy_blink_timer.isActive():
+                self.__busy_blink_timer.start(500)  # Blink every 500ms
+        else:
+            self.__busy_blink_timer.stop()
+            self.__busy_blink_visible = True
+
         if s.state == BeamlineStateEnum.BeamLocation:
             self.__state = SampleCameraImageState.BEAM_MARKING
         elif self.__state == SampleCameraImageState.BEAM_MARKING:
             self.__state = SampleCameraImageState.IDLE
 
+        self.update()
+
     def __left_single_click(self, event):
         match self.__state:
             case SampleCameraImageState.BEAM_MARKING:
@@ -365,6 +441,9 @@ class SampleCameraImageLabel(QGraphicsView):
 
         if self.__state == SampleCameraImageState.BEAM_MARKING:
             painter.setPen(QPen(QColor(102, 51, 153), 3, Qt.PenStyle.SolidLine))
+        elif self.__is_daq_busy is True:
+            # Use red color to indicate busy state
+            painter.setPen(QPen(QColor(255, 0, 0), 3, Qt.PenStyle.SolidLine))
         else:
             painter.setPen(QPen(QColor(245, 121, 0), 3, Qt.PenStyle.SolidLine))