More work on Android touch events. Fixed the issues I was having with busted float coords, and added some logic for a different way to deal with selection. Doubleclicking is no longer required; instead, if you generate a finger up event within 50 pixels of where you fingered down, this will be treated as an JGE_BTN_OK event. I think this feels more natural, as you can drag around in a menu or to various cards; then when you find your selection, simply touching it again once triggers the selection.

JGE/Dependencies/SDL/src/events/SDL_touch.c

@@ -141,8 +141,10 @@ SDL_AddTouch(const SDL_Touch * touch, char *name)
     SDL_touchPads[index]->relative_mode = SDL_FALSE;
     SDL_touchPads[index]->flush_motion = SDL_FALSE;
     
-    SDL_touchPads[index]->xres = (1<<(16-1));
-    SDL_touchPads[index]->yres = (1<<(16-1));
+    // Wil 06/10/11:  WTF is this for?  It's stomping over what's been passed in!
+    //SDL_touchPads[index]->xres = (1<<(16-1));
+    //SDL_touchPads[index]->yres = (1<<(16-1));
+
     //Do I want this here? Probably
     SDL_GestureAddTouch(SDL_touchPads[index]);
 
@@ -309,16 +311,15 @@ SDL_DelFinger(SDL_Touch* touch,SDL_FingerID fingerid)
     return 0;
 }
 
-
 int
 SDL_SendFingerDown(SDL_TouchID id, SDL_FingerID fingerid, SDL_bool down, 
                    float xin, float yin, float pressurein)
 {
     int posted;
-        Uint16 x;
-        Uint16 y;
-        Uint16 pressure;
-        SDL_Finger *finger;
+    Uint16 x;
+    Uint16 y;
+    Uint16 pressure;
+    SDL_Finger *finger;
 
     SDL_Touch* touch = SDL_GetTouch(id);
 
@@ -331,10 +332,6 @@ SDL_SendFingerDown(SDL_TouchID id, SDL_FingerID fingerid, SDL_bool down,
     y = (Uint16)((yin+touch->y_min)*(touch->yres)/(touch->native_yres));
     pressure = (Uint16)((pressurein+touch->pressure_min)*(touch->pressureres)/(touch->native_pressureres));
 
-    char buffer[64];
-    sprintf(buffer, "Finger Down: xin: %g yin: %g x: %d y: %d", xin, yin, x, y);
-    __android_log_write(ANDROID_LOG_DEBUG, "Wagic", buffer);
-    
     finger = SDL_GetFinger(touch,fingerid);
     if(down) {
         if(finger == NULL) {

JGE/Dependencies/SDL/src/video/android/SDL_androidtouch.c

@@ -25,6 +25,7 @@
 #include "SDL_events.h"
 #include "SDL_touch.h"
 #include "../../events/SDL_mouse_c.h"
+#include "../../events/SDL_touch_c.h"
 
 #include "SDL_androidtouch.h"
 
@@ -42,16 +43,21 @@ SDL_Touch* CreateTouchInstance()
 {
 	SDL_Touch touch;
 	touch.id = gTouchID;
+
 	touch.x_min = 0;
 	touch.x_max = 1;
-	touch.native_xres = touch.xres = 1;
+	touch.native_xres = 1;
     touch.xres = 1;
-	touch.y_min = 0;
+
+    touch.y_min = 0;
 	touch.y_max = 1;
-	touch.native_yres = touch.yres = 1;
-	touch.pressure_min = 0;
+	touch.native_yres = 1;
+    touch.yres = 1;
+
+    touch.pressure_min = 0;
 	touch.pressure_max = 1;
-	touch.native_pressureres = touch.pressure_max - touch.pressure_min;
+	touch.native_pressureres = 1;
+    touch.pressureres = 1;
 
 	SDL_AddTouch(&touch, "");
 

JGE/src/SDLmain.cpp

@@ -40,6 +40,8 @@ enum eDisplayMode
 
 unsigned int gDisplayMode = DisplayMode_lowRes;
 
+const int kHitzonePliancy = 50;
+
 class SdlApp
 {
 public: /* For easy interfacing with JGE static functions */
@@ -53,8 +55,11 @@ public: /* For easy interfacing with JGE static functions */
 	int             windowed_pos_x;
 	int             windowed_pos_y;
 
+    int mMouseDownX;
+    int mMouseDownY;
+
 public:
-	SdlApp() : Surf_Display(NULL), window(NULL), lastMouseUpTime(0), Running(true)
+	SdlApp() : Surf_Display(NULL), window(NULL), lastMouseUpTime(0), Running(true), mMouseDownX(0), mMouseDownY(0)
 	{
 	}
 
@@ -503,11 +508,21 @@ void SdlApp::OnTouchEvent(const SDL_TouchFingerEvent& event)
         g_engine->LeftClicked(
             ((event.x - viewPort.x) * SCREEN_WIDTH) / actualWidth,
             ((event.y - viewPort.y) * SCREEN_HEIGHT) / actualHeight);
-       
+
+         if (event.type == SDL_FINGERDOWN)
+         {
+             mMouseDownX = event.x;
+             mMouseDownY = event.y;
+         }
+
 #if (defined ANDROID) || (defined IOS)
         if (event.type == SDL_FINGERUP)
         {
-            g_engine->HoldKey_NoRepeat(JGE_BTN_OK);
+            // treat an up finger within 50 pixels of the down finger coords as a double click event
+            if (abs(mMouseDownX - event.x) < kHitzonePliancy && abs(mMouseDownY - event.y) < kHitzonePliancy)
+            {
+                g_engine->HoldKey_NoRepeat(JGE_BTN_OK);
+            }
         }
 #endif
     }