gui context menu for libraries to un/load all instruments

engine/api.py

@@ -233,6 +233,18 @@ def unloadAllInstrumentSamples():
             callbacks._instrumentStatusChanged(*instrument.idKey) #Needs to be here to have incremental updates in the gui.
     callbacks._dataChanged()
 
+def loadLibraryInstrumentSamples(libId):
+    """Convenience function like loadAllInstrumentSamples or loadInstrumentSamples for the whole
+    lib"""
+    for instrumentId in session.data.libraries[libId].instruments.keys():
+        idKey = (libId, instrumentId)
+        loadInstrumentSamples(idKey) #all callbacks are triggered there
+
+def unloadLibraryInstrumentSamples(libId):
+    for instrumentId in session.data.libraries[libId].instruments.keys():
+        idKey = (libId, instrumentId)
+        unloadInstrumentSamples(idKey) #all callbacks are triggered there
+
 def unloadInstrumentSamples(idKey:tuple):
     instrument = _instr(idKey)
     if instrument.enabled:

qtgui/instrument.py

@@ -291,13 +291,16 @@ class InstrumentTreeController(object):
         gi.activity() #We only do a quick flash here. No need for velocity, pitch or note-off
 
 
-    def contextMenu(self, qpoint):
+    def contextMenu(self, qpoint): #strange that this is not an event but a qpoint
         item = self.treeWidget.itemAt(qpoint)
-        if not type(item) is GuiInstrument: #and not GuiLibrary
+        if not item:
             return
-        elif not item.state:
+        elif type(item) is GuiLibrary:
+            item.contextMenu(qpoint)
+        elif type(item) is GuiInstrument and not item.state:
             return
-        else:
+        else: #GuiInstrument and item.state
+            assert item.state
             externalPort = nestedJackPortsMenu() #returns None or clientAndPortString
             if externalPort: #None or ClientPortString
                 api.connectInstrumentPort(item.idKey, externalPort)
@@ -331,6 +334,31 @@ class GuiLibrary(QtWidgets.QTreeWidgetItem):
         icon = parentTreeController.parentMainWindow.style().standardIcon(getattr(QtWidgets.QStyle, "SP_DirIcon"))
         self.setIcon(COLUMNS.index("name"), icon)
 
+    def contextMenu(self, qpoint):
+        """This isn't the qt function, but we call this from self.parentTreeController.
+        Logically it makes sense to have it here though"""
+        menu = QtWidgets.QMenu()
+
+        listOfLabelsAndFunctions = [
+            (QtCore.QCoreApplication.translate("GuiLibraryContextMenu", "Load whole Library"), lambda: api.loadLibraryInstrumentSamples(self.id)),
+            (QtCore.QCoreApplication.translate("GuiLibraryContextMenu", "Unload whole Library"), lambda: api.unloadLibraryInstrumentSamples(self.id)),
+            ]
+
+        for text, function in listOfLabelsAndFunctions:
+            if function is None:
+                l = QtWidgets.QLabel(text)
+                l.setAlignment(QtCore.Qt.AlignCenter)
+                a = QtWidgets.QWidgetAction(menu)
+                a.setDefaultWidget(l)
+                menu.addAction(a)
+            else:
+                a = QtWidgets.QAction(text, menu)
+                menu.addAction(a)
+                a.triggered.connect(function)
+
+        pos = QtGui.QCursor.pos()
+        pos.setY(pos.y() + 5)
+        menu.exec_(pos)
 
 
 class GuiInstrument(QtWidgets.QTreeWidgetItem):