Support for special click area to toggle ActionBar.

src/com/froop/app/kegs/BitmapSize.java

@@ -67,6 +67,14 @@ class BitmapSize {
     }
   }
 
+  public int getScreenWidth() {
+    return mWidth;
+  }
+
+  public int getScreenHeight() {
+    return mHeight;
+  }
+
   public int getViewWidth() {
     return (int)(Const.A2Width * mScaleFactorX);
   }

src/com/froop/app/kegs/KegsMain.java

@@ -8,6 +8,7 @@ import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.res.Configuration;
+import android.graphics.Rect;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.AsyncTask;
@@ -49,7 +50,7 @@ public class KegsMain extends SherlockFragmentActivity implements KegsKeyboard.S
   private TouchJoystick mJoystick;
 
   private boolean mModeMouse = true;
-
+  private boolean mOverrideActionBar = false;
   private long mScreenSizeTime = 0;
 
   private boolean mPaused = false;
@@ -345,7 +346,24 @@ public class KegsMain extends SherlockFragmentActivity implements KegsKeyboard.S
     return mKegsThread;
   }
 
+  // Designate the upper right corner as a special zone that
+  // toggles the action bar.
+  private Rect getSpecialActionBarRect(BitmapSize bitmapSize) {
+    final int left = (int)(bitmapSize.getScreenWidth() * 0.80);
+    final int top = 0;
+    final int right = bitmapSize.getScreenWidth();
+    final int bottom = (int)(bitmapSize.getScreenHeight() * 0.10);
+
+    // Only have a special zone if the action bar is not supposed to be visible.
+    if (!bitmapSize.showActionBar() && left != 0 && bottom != 0) {
+      return new Rect(left, top, right, bottom);
+    } else {
+      return null;
+    }
+  }
+
   private void updateActionBar(boolean showActionBar) {
+    showActionBar = mOverrideActionBar || showActionBar;
     final ActionBar actionBar = getSupportActionBar();
     if (actionBar != null && showActionBar) {
       actionBar.show();
@@ -374,6 +392,13 @@ public class KegsMain extends SherlockFragmentActivity implements KegsKeyboard.S
     updateActionBar(bitmapSize.showActionBar());
 
     mKegsView.updateScreenSize(bitmapSize);
+    mKegsTouch.setSpecialZone(
+      new TouchSpecialZone(getSpecialActionBarRect(bitmapSize)) {
+        public void activate() {
+          mOverrideActionBar = !mOverrideActionBar;
+          updateActionBar(mOverrideActionBar);
+        }
+      });
 
     // Force another redraw of the bitmap into the canvas.  Bug workaround.
     getThread().updateScreen();

src/com/froop/app/kegs/KegsTouch.java

@@ -1,6 +1,7 @@
 package com.froop.app.kegs;
 
 import android.content.Context;
+import android.graphics.Rect;
 import android.os.Handler;
 import android.os.Message;
 import android.util.Log;
@@ -31,6 +32,8 @@ class KegsTouch {
   private static final int LONG_PRESS = 1;
   private static final int LONG_PRESS_TIMEOUT = ViewConfiguration.getLongPressTimeout();
 
+  private TouchSpecialZone mSpecialZone = null;
+
   public KegsTouch(Context context, ConcurrentLinkedQueue q) {
     mEventQueue = q;
 
@@ -39,6 +42,10 @@ class KegsTouch {
     mTouchSlopSquare = touchSlop * touchSlop;
   }
 
+  public void setSpecialZone(TouchSpecialZone zone) {
+    mSpecialZone = zone;
+  }
+
   private Handler mHandler = new Handler() {
     public void handleMessage(Message msg) {
       if (msg.what == LONG_PRESS) {
@@ -120,10 +127,13 @@ class KegsTouch {
           }
         } else if (!checkPrimarySlop(event, pointerIndex)) {
           // It didn't move while it was down, so send a click event.
-          mButton1 = 1;
-          mEventQueue.add(new Event.MouseKegsEvent(0, 0, mButton1, 1));
-          mButton1 = 0;
-          mEventQueue.add(new Event.MouseKegsEvent(0, 0, mButton1, 1));
+          if (mSpecialZone != null &&
+              !mSpecialZone.click(event, pointerIndex)) {
+            mButton1 = 1;
+            mEventQueue.add(new Event.MouseKegsEvent(0, 0, mButton1, 1));
+            mButton1 = 0;
+            mEventQueue.add(new Event.MouseKegsEvent(0, 0, mButton1, 1));
+          }
         }
         mPrimaryId = -1;
         mPrimaryPastSlop = false;

src/com/froop/app/kegs/TouchSpecialZone.java

@@ -0,0 +1,29 @@
+package com.froop.app.kegs;
+
+import android.graphics.Rect;
+import android.util.Log;
+import android.view.MotionEvent;
+
+class TouchSpecialZone {
+  // Clicks within this rect have a special handler.
+  private Rect mSpecialRect = null;
+
+  public TouchSpecialZone(Rect zone) {
+    mSpecialRect = zone;  // may be null
+  }
+
+  // Override this.
+  public void activate() {}
+
+  public boolean click(MotionEvent point, int index) {
+    if (mSpecialRect != null) {
+      final int x = (int)point.getX(index);
+      final int y = (int)point.getY(index);
+      if (mSpecialRect.contains(x, y)) {
+        activate();
+        return true;
+      }
+    }
+    return false;
+  }
+}