PICARD-2873: Fetch Search dialog cover art images after it was resized

- create a new `resized` signal emitted every second
- call `AlbumSearchDialog.fetch_coverarts()` when it happens

picard/ui/searchdialog/album.py

@@ -168,6 +168,7 @@ def __init__(self, parent, force_advanced_search=None, existing_album=None):
         self.cover_cells = []
         self.fetching = False
         self.scrolled.connect(self.fetch_coverarts)
+        self.resized.connect(self.fetch_coverarts)
 
     @staticmethod
     def show_releasegroup_search(releasegroup_id, existing_album=None):

picard/ui/tablebaseddialog.py

@@ -52,6 +52,7 @@ class ResultTable(QtWidgets.QTableWidget):
 
     def __init__(self, parent):
         super().__init__(parent)
+        self._parent_dialog = parent
         self.setSelectionMode(QtWidgets.QAbstractItemView.SelectionMode.ExtendedSelection)
         self.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectionBehavior.SelectRows)
         self.setEditTriggers(QtWidgets.QAbstractItemView.EditTrigger.NoEditTriggers)
@@ -73,6 +74,14 @@ def prepare(self, headers):
         self.setRowCount(0)
         self.setSortingEnabled(False)
 
+    @throttle(1000)  # only emit resized signal once per second
+    def emit_resized(self):
+        self._parent_dialog.resized.emit()
+
+    def resizeEvent(self, event):
+        self.emit_resized()
+        super().resizeEvent(event)
+
 
 class SortableTableWidgetItem(QtWidgets.QTableWidgetItem):
 
@@ -88,6 +97,7 @@ class TableBasedDialog(PicardDialog):
 
     defaultsize = QtCore.QSize(720, 360)
     scrolled = pyqtSignal()
+    resized = pyqtSignal()
 
     def __init__(self, parent):
         super().__init__(parent)