From 3ebde34d8fbcce5796b7bac6f26c9cf7881b55ad Mon Sep 17 00:00:00 2001
From: sunnystormy <michael.brodeur@unseen.is>
Date: Wed, 6 Apr 2016 02:15:34 -0400
Subject: [PATCH] Added rotation/panning support for trackpads in 3D mode #53

---
 .../editor/plugins/spatial_editor_plugin.cpp  | 27 +++++++++++++++----
 1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/tools/editor/plugins/spatial_editor_plugin.cpp b/tools/editor/plugins/spatial_editor_plugin.cpp
index 79ff78ca0df..13b47f9fd37 100644
--- a/tools/editor/plugins/spatial_editor_plugin.cpp
+++ b/tools/editor/plugins/spatial_editor_plugin.cpp
@@ -819,7 +819,6 @@ void SpatialEditorViewport::_sinput(const InputEvent &p_event) {
 		}
 	}
 
-
 	switch(p_event.type) {
 		case InputEvent::MOUSE_BUTTON: {
 
@@ -1204,11 +1203,9 @@ void SpatialEditorViewport::_sinput(const InputEvent &p_event) {
 			}
 		} break;
 		case InputEvent::MOUSE_MOTION: {
-
 			const InputEventMouseMotion &m=p_event.mouse_motion;
 			_edit.mouse_pos=Point2(p_event.mouse_motion.x,p_event.mouse_motion.y);
-
-
+			
 			if (spatial_editor->get_selected()) {
 
 
@@ -1244,7 +1241,7 @@ void SpatialEditorViewport::_sinput(const InputEvent &p_event) {
 
 			NavigationScheme nav_scheme = _get_navigation_schema("3d_editor/navigation_scheme");
 			NavigationMode nav_mode = NAVIGATION_NONE;
-
+			
 			if (_edit.gizmo.is_valid()) {
 
 				Plane plane=Plane(_edit.gizmo_initial_pos,_get_camera_normal());
@@ -1558,6 +1555,26 @@ void SpatialEditorViewport::_sinput(const InputEvent &p_event) {
 					if (m.mod.alt)
 						nav_mode = NAVIGATION_PAN;
 				}
+			}else{
+				// Handle trackpad (no external mouse) use case
+				int mod = 0;
+				if (m.mod.shift)
+					mod=KEY_SHIFT;
+				if (m.mod.alt)
+					mod=KEY_ALT;
+				if (m.mod.control)
+					mod=KEY_CONTROL;
+				if (m.mod.meta)
+					mod=KEY_META;
+				
+				if(mod){
+					if (mod == _get_key_modifier("3d_editor/pan_modifier"))
+						nav_mode = NAVIGATION_PAN;
+					else if (mod == _get_key_modifier("3d_editor/zoom_modifier"))
+						nav_mode = NAVIGATION_ZOOM;
+					else if (mod == _get_key_modifier("3d_editor/orbit_modifier"))
+						nav_mode = NAVIGATION_ORBIT;
+				}
 			}
 
 			switch(nav_mode) {