Make the keys send notes to the selected plugin(s)

source/carla_patchbay.py

@@ -69,6 +69,7 @@ class CarlaPatchbayW(QFrame):
         self.fParent      = parent
         self.fPluginCount = 0
         self.fPluginList  = []
+        self.fSelectedPlugins = []
 
         self.fCanvasWidth  = 0
         self.fCanvasHeight = 0
@@ -107,6 +108,9 @@ class CarlaPatchbayW(QFrame):
 
         self.fMiniCanvasPreview.miniCanvasMoved.connect(self.slot_miniCanvasMoved)
 
+        self.fKeys.keyboard.noteOn.connect(self.slot_noteOn)
+        self.fKeys.keyboard.noteOff.connect(self.slot_noteOff)
+
         if not doSetup: return
 
         parent.ui.act_plugins_enable.triggered.connect(self.slot_pluginsEnable)
@@ -352,6 +356,7 @@ class CarlaPatchbayW(QFrame):
     @pyqtSlot(list)
     def slot_canvasPluginSelected(self, pluginList):
         self.fKeys.setEnabled(len(pluginList) != 0)
+        self.fSelectedPlugins = pluginList
 
     @pyqtSlot(float, float)
     def slot_miniCanvasMoved(self, xp, yp):
@@ -363,6 +368,18 @@ class CarlaPatchbayW(QFrame):
 
     # -----------------------------------------------------------------
 
+    @pyqtSlot(int)
+    def slot_noteOn(self, note):
+        for pluginId in self.fSelectedPlugins:
+            Carla.host.send_midi_note(pluginId, 0, note, 100)
+
+    @pyqtSlot(int)
+    def slot_noteOff(self, note):
+        for pluginId in self.fSelectedPlugins:
+            Carla.host.send_midi_note(pluginId, 0, note, 0)
+
+    # -----------------------------------------------------------------
+
     @pyqtSlot()
     def slot_pluginsEnable(self):
         if not Carla.host.is_engine_running():