add patch and clicktracking to lua

samplecode/SampleLua.cpp

Index: samplecode/SampleLua.cpp
diff --git a/samplecode/SampleLua.cpp b/samplecode/SampleLua.cpp
index 921931b20cedb6454d229dc35e279c343c88b157..81ac6aef0d9ee096cde6ef9da6a1ac94cec8ee3a 100644
--- a/samplecode/SampleLua.cpp
+++ b/samplecode/SampleLua.cpp
@@ -25,6 +25,8 @@ static const char gDrawName[] = "onDrawContent";
 static const char gClickName[] = "onClickHandler";
 static const char gUnicharName[] = "onCharHandler";
 
+static const char gLuaClickHandlerName[] = "lua-click-handler";
+
 static const char gMissingCode[] = ""
     "local paint = Sk.newPaint()"
     "paint:setAntiAlias(true)"
@@ -130,11 +132,15 @@ protected:
         if (lua_isfunction(L, -1)) {
             fLua->pushScalar(x);
             fLua->pushScalar(y);
-            if (lua_pcall(L, 2, 1, 0) != LUA_OK) {
+            fLua->pushString("down");
+            if (lua_pcall(L, 3, 1, 0) != LUA_OK) {
                 SkDebugf("lua err: %s\n", lua_tostring(L, -1));
             } else {
                 if (lua_isboolean(L, -1) && lua_toboolean(L, -1)) {
                     this->inval(NULL);
+                    Click* c = new Click(this);
+                    c->setType(gLuaClickHandlerName);
+                    return c;
                 }
             }
         }
@@ -142,7 +148,32 @@ protected:
     }
 
     virtual bool onClick(Click* click) SK_OVERRIDE {
-        return this->INHERITED::onClick(click);
+        if (click->getType() != gLuaClickHandlerName) {
+            return this->INHERITED::onClick(click);
+        }
+
+        const char* state = NULL;
+        switch (click->fState) {
+            case Click::kMoved_State:
+                state = "moved";
+                break;
+            case Click::kUp_State:
+                state = "up";
+                break;
+            default:
+                break;
+        }
+        if (state) {
+            this->inval(NULL);
+            lua_State* L = fLua->get();
+            lua_getglobal(L, gClickName);
+            fLua->pushScalar(click->fCurr.x());
+            fLua->pushScalar(click->fCurr.y());
+            fLua->pushString(state);
+            lua_pcall(L, 3, 1, 0);
+            return lua_isboolean(L, -1) && lua_toboolean(L, -1);
+        }
+        return true;
     }
 
 private: