Item list: refresh tree when item parameters are changed

Author: PierreRaybaut

CHANGELOG.md

@@ -17,6 +17,11 @@
   * This allows the tools to work properly when no image item is selected, but there are image items in the plot
   * This closes [Issue #47](https://github.com/PlotPyStack/PlotPy/issues/47) - Intensity profile tools do not work when no image item is selected
 * [Issue #46](https://github.com/PlotPyStack/PlotPy/issues/46) - Contrast adjustment with 'Eliminate outliers' failed for float images with high dynamic range
+* Item list: refresh tree when item parameters are changed:
+  * Added `SIG_ITEM_PARAMETERS_CHANGED` signal to `BasePlot` class
+  * This signal is emitted when the parameters of an item are changed using the parameters dialog, or a specific tool (e.g. the colormap selection tool, or the lock/unlock tool for image items)
+  * The signal is emitted with the item as argument
+  * The `ItemListWidget` now listens to this signal and refreshes the item list accordingly
 
 Other changes:
 

plotpy/panels/itemlist.py

@@ -25,14 +25,13 @@
 from plotpy.interfaces import IPanel
 from plotpy.interfaces import items as itf
 from plotpy.panels.base import PanelWidget
+from plotpy.plot import BasePlot, PlotManager
 from plotpy.styles.base import ItemParameters
 
 if TYPE_CHECKING:
     from qtpy.QtGui import QContextMenuEvent, QIcon
     from qtpy.QtWidgets import QListWidgetItem, QWidget
 
-    from plotpy.plot import BasePlot, PlotManager
-
 
 class ItemListWidget(QW.QListWidget):
     """
@@ -73,6 +72,7 @@ def register_panel(self, manager: PlotManager) -> None:
         for plot in self.manager.get_plots():
             plot.SIG_ITEMS_CHANGED.connect(self.items_changed)
             plot.SIG_ACTIVE_ITEM_CHANGED.connect(self.active_item_changed)
+            plot.SIG_ITEM_PARAMETERS_CHANGED.connect(self.item_parameters_changed)
         self.plot = self.manager.get_plot()
 
     def contextMenuEvent(self, event: QContextMenuEvent) -> None:
@@ -230,6 +230,17 @@ def active_item_changed(self, plot: BasePlot) -> None:
         self.refresh_actions()
         self.blockSignals(_block)
 
+    def item_parameters_changed(self, item: itf.IBasePlotItem) -> None:
+        """Item parameters have changed
+
+        Args:
+            item: item
+        """
+        if not isinstance(item, BasePlot):
+            plot = item.plot()
+            if plot is not None:
+                self.items_changed(plot)
+
     def current_row_changed(self, index: int) -> None:
         """QListWidget current row has changed