gui: better key binding ux

alacritty_config_gui.py

@@ -210,13 +210,20 @@ class KeyBindingDialog(QtWidgets.QDialog):
         self.mods.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
         self.layout.addRow(QtWidgets.QLabel('Mods'), self.mods)
 
+        self.tabs = QtWidgets.QTabWidget()
+
         self.action = QtWidgets.QComboBox()
         for option in self.action_options:
             self.action.addItem(option)
-        self.layout.addRow(QtWidgets.QLabel('Action'), self.action)
+        self.tabs.addTab(self.action, 'Action')
 
         self.chars = QtWidgets.QLineEdit()
-        self.layout.addRow(QtWidgets.QLabel('Chars'), self.chars)
+        self.tabs.addTab(self.chars, 'Chars')
+
+        self.command = QtWidgets.QLineEdit()
+        self.tabs.addTab(self.command, 'Command')
+
+        self.layout.addWidget(self.tabs)
 
         buttons = QtWidgets.QDialogButtonBox()
         buttons.addButton(buttons.Ok)
@@ -232,19 +239,23 @@ class KeyBindingDialog(QtWidgets.QDialog):
         # TODO: this is an ugly heuristic. should we parse yaml here?
         self.result['key'] = int(key) if key.isdigit() else key
 
-        action = self.action.currentText()
-        if action:
-            self.result['action'] = action
-
-        chars = self.chars.text()
-        if chars:
-            self.result['chars'] = chars
-
         mods = self.mods.selectedItems()
-
         if len(mods):
             self.result['mods'] = '|'.join(mod.text() for mod in mods)
 
+        idx = self.tabs.currentIndex()
+        title = self.tabs.tabText(idx).lower()
+
+        if title == 'action':
+            self.result['action'] = self.action.currentText()
+        elif title == 'chars':
+            self.result['chars'] = self.chars.text()
+        elif title == 'command':
+            command = self.command.text().split(' ')
+            self.result['command'] = {
+                'program': command[0], 'args': command[1:]
+            }
+
         self.accept()