resolved scrolling issue (Issue 801) in filters list. it's a little verbose, but it seems to work. need to see if we can't refactor CheckUserInput to reduce the amount of code duplication. The logic for SimpleMenu is slightly different from the base method. perhaps we should override CheckUserInput to take in two parameters instead of one.

projects/mtg/src/SimpleMenu.cpp

@@ -101,7 +101,6 @@ void SimpleMenu::drawVertPole(float x, float y, float height)
 {
     JRenderer* renderer = JRenderer::GetInstance();
 
-
     float xOffset = (spadeR->mWidth - kPoleWidth) / 2;
     float topYOffset = xOffset;
     float bottomYOffset = xOffset;
@@ -213,12 +212,78 @@ void SimpleMenu::Render()
     mFont->SetScale(SCALE_NORMAL);
 }
 
+bool SimpleMenu::CheckUserInput(JButton key)
+{
+    // a dude may have clicked somewhere, we're gonna select the closest object from where he clicked
+    int x = -1, y = -1;
+    unsigned int distance2;
+    unsigned int minDistance2 = -1;
+    int n = mCurr;
+    
+    if ((key == JGE_BTN_NONE) && mEngine->GetLeftClickCoordinates(x, y))
+    {
+
+        // first scan the buttons on the screen and then process the other gui elements
+        for (size_t i = 0; i < mButtons.size(); i++)
+        {
+            if (mButtons[i]->ButtonPressed())
+            {
+                mEngine->LeftClickedProcessed();
+                return true;
+            }
+        }
+        
+        if (mObjects.size())
+        {
+            float top, left;
+            
+            for (int i = 0; i < mCount; i++)
+            {
+                if (mObjects[i]->getTopLeft(top, left))
+                {
+                    distance2 = (top - y) * (top - y) + (left - x) * (left - x);
+                    if ( (distance2 < minDistance2) )
+                    {
+                        minDistance2 = distance2;
+                        n = i;
+                    }
+                    else if (y > mHeight) // this will scroll downwards in a list.  
+                    {
+                        n =  mCurr + 1;
+                    }
+                }   
+            }
+            
+            if (n != mCurr && mObjects[mCurr] != NULL && mObjects[mCurr]->Leaving(JGE_BTN_DOWN))
+            {
+                mCurr = n;
+                mObjects[mCurr]->Entering();
+            }
+            // if the same object was selected process click
+            else if (n == mCurr && mObjects[mCurr] != NULL && mObjects[mCurr]->Leaving(JGE_BTN_OK))
+            {
+                mObjects[mCurr]->Entering();
+            }
+            mEngine->LeftClickedProcessed();
+            mEngine->ResetInput();
+            return true;
+        }
+        mEngine->LeftClickedProcessed();
+    }
+    else
+        return JGuiController::CheckUserInput(key);
+    
+    return false;
+}
+
+
 void SimpleMenu::Update(float dt)
 {
     JGuiController::Update(dt);
     if (mCurr > startId + maxItems - 1)
         startId = mCurr - maxItems + 1;
     else if (mCurr < startId) startId = mCurr;
+ 
     stars->Update(dt);
     selectionT += 3 * dt;
     selectionY += (selectionTargetY - selectionY) * 8 * dt;