Draft: Add example tool hints

src/Mod/Draft/draftguitools/gui_arcs.py

@@ -291,6 +291,36 @@ class Arc(gui_base_original.Creator):
                         self.step = 4
                         self.drawArc()
 
+        self.updateHints()
+
+    def getHints(self):
+        hint_global = Gui.InputHint(translate("draft", "%1 toggle global"), Gui.UserInput.KeyG)
+        hint_continue = Gui.InputHint(translate("draft", "%1 toggle continue"), Gui.UserInput.KeyN)
+
+        if self.step == 0:
+            return [
+                Gui.InputHint(translate("draft", "%1 pick center"), Gui.UserInput.MouseLeft),
+                hint_global,
+                hint_continue,
+            ]
+        elif self.step == 1:
+            return [
+                Gui.InputHint(translate("draft", "%1 pick radius"), Gui.UserInput.MouseLeft),
+                hint_continue,
+            ]
+        elif self.step == 2:
+            return [
+                Gui.InputHint(translate("draft", "%1 pick staring angle"), Gui.UserInput.MouseLeft),
+                hint_continue,
+            ]
+        elif self.step == 3:
+            return [
+                Gui.InputHint(translate("draft", "%1 pick aperture"), Gui.UserInput.MouseLeft),
+                hint_continue,
+            ]
+        else:
+            return []
+
     def drawArc(self):
         """Actually draw the arc object."""
         rot, sup, pts, fil = self.getStrings()

src/Mod/Draft/draftguitools/gui_base_original.py

@@ -136,6 +136,17 @@ class DraftTool:
         _toolmsg("{}".format(16*"-"))
         _toolmsg("GuiCommand: {}".format(self.featureName))
 
+        # update hints after the tool is fully initialized
+        QtCore.QTimer.singleShot(0, self.updateHints)
+
+    def updateHints(self):
+        Gui.HintManager.show(*self.getHints())
+
+    def getHints(self):
+        return [
+            Gui.InputHint("%1 constrain", Gui.UserInput.KeyShift)
+        ]
+
     def end_callbacks(self, call):
         try:
             self.view.removeEventCallback("SoEvent", call)
@@ -184,6 +195,8 @@ class DraftTool:
                 todo.ToDo.delayCommit(self.commitList)
         self.commitList = []
 
+        Gui.HintManager.hide()
+
     def commit(self, name, func):
         """Store actions in the commit list to be run later.