From: Sylvain Beucler <beuc@beuc.net>
Date: Fri, 4 May 2012 19:59:36 +0000 (+0000)
Subject: android: add code to display multi-touch events
X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=commitdiff_plain;h=1c44434d29188fbfe47a2239c045f8059600ed42;p=freeglut

android: add code to display multi-touch events

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@1303 7f0cb862-5218-0410-a997-914c9d46530a
---

diff --git a/src/android/fg_cursor_android.c b/src/android/fg_cursor_android.c
index 28838a9..fe599d1 100644
--- a/src/android/fg_cursor_android.c
+++ b/src/android/fg_cursor_android.c
@@ -28,7 +28,7 @@
 
 void fgPlatformSetCursor ( SFG_Window *window, int cursorID )
 {
-    // No-op: no visible cursor on touchscreens
+    /* No-op: no visible cursor on touchscreens */
 }
 
 void fgPlatformWarpPointer ( int x, int y )
@@ -38,4 +38,5 @@ void fgPlatformWarpPointer ( int x, int y )
     SFG_Window* window = fgStructure.CurrentWindow;
     window->State.MouseX = x;
     window->State.MouseY = y;
+    /* TODO: this should simulate a fake motion event */
 }
diff --git a/src/android/fg_joystick_android.c b/src/android/fg_joystick_android.c
index e843348..148c500 100644
--- a/src/android/fg_joystick_android.c
+++ b/src/android/fg_joystick_android.c
@@ -29,6 +29,11 @@
 #include <GL/freeglut.h>
 #include "fg_internal.h"
 
+/**
+ * TODO: Android has no joysticks at the moment (only touchscreens/touchpads),
+ * but we could expose the accelerometer as a 3-axis joystick.
+ */
+
 void fgPlatformJoystickRawRead( SFG_Joystick* joy, int* buttons, float* axes )
 {
     fgWarning("fgPlatformJoystickRawRead: STUB\n");
diff --git a/src/android/fg_main_android.c b/src/android/fg_main_android.c
index 67bdead..a989a27 100644
--- a/src/android/fg_main_android.c
+++ b/src/android/fg_main_android.c
@@ -222,12 +222,26 @@ int32_t handle_input(struct android_app* app, AInputEvent* event) {
     }
   }
 
-  if (AInputEvent_getType(event) == AINPUT_EVENT_TYPE_MOTION) {
-    int32_t action = AMotionEvent_getAction(event);
+  int32_t source = AInputEvent_getSource(event);
+  if (AInputEvent_getType(event) == AINPUT_EVENT_TYPE_MOTION
+      && source == AINPUT_SOURCE_TOUCHSCREEN) {
+    int32_t action = AMotionEvent_getAction(event) & AMOTION_EVENT_ACTION_MASK;
+    /* Pointer ID for clicks */
+    int32_t pidx = AMotionEvent_getAction(event) >> AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
+    /* TODO: Handle multi-touch; also handle multiple sources */
+    if (0) {
+      LOGI("motion action=%d index=%d source=%d", action, pidx, source);
+      int count = AMotionEvent_getPointerCount(event);
+      int i;
+      for (i = 0; i < count; i++) {
+        LOGI("multi(%d): %.01f,%.01f",
+             AMotionEvent_getPointerId(event, i),
+             AMotionEvent_getX(event, i), AMotionEvent_getY(event, i));
+      }
+    }
     float x = AMotionEvent_getX(event, 0);
     float y = AMotionEvent_getY(event, 0);
-    LOGI("motion %.01f,%.01f action=%d", x, y, AMotionEvent_getAction(event));
-    
+
     /* Virtual arrows PAD */
     /* Don't interfere with existing mouse move event */
     if (!touchscreen.in_mmotion) {
@@ -285,7 +299,6 @@ int32_t handle_input(struct android_app* app, AInputEvent* event) {
     if (!touchscreen.vpad.on) {
       window->State.MouseX = x;
       window->State.MouseY = y;
-      LOGI("Changed mouse position: %f,%f", x, y);
       if (action == AMOTION_EVENT_ACTION_DOWN && FETCH_WCB(*window, Mouse)) {
 	touchscreen.in_mmotion = true;
 	INVOKE_WCB(*window, Mouse, (GLUT_LEFT_BUTTON, GLUT_DOWN, x, y));