implement PopupWindow using GtkPopover

src/api-impl/android/widget/PopupWindow.java

@@ -1,6 +1,59 @@
 package android.widget;
 
+import android.content.Context;
+import android.graphics.drawable.Drawable;
+import android.util.AttributeSet;
+import android.view.View;
+
 public class PopupWindow {
-	
-	public interface OnDismissListener {}
+
+	public PopupWindow(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+		popover = native_constructor();
+	}
+
+	private View contentView;
+	private long popover;  // native pointer to GtkPopover
+
+	public interface OnDismissListener {
+		public void onDismiss();
+	}
+
+	protected native long native_constructor();
+	protected native void native_setContentView(long widget, long contentView);
+	protected native void native_showAsDropDown(long widget, long anchor, int xoff, int yoff, int gravity);
+
+	public void setBackgroundDrawable(Drawable background) {}
+
+	public void setInputMethodMode(int mode) {}
+
+	public boolean isShowing() {return false;}
+
+	public native void setOnDismissListener(OnDismissListener listener);
+
+	public void setFocusable(boolean focusable) {}
+
+	public Drawable getBackground() {return null;}
+
+	public void setContentView(View view) {
+		contentView = view;
+		native_setContentView(popover, view.widget);
+	}
+
+	public int getInputMethodMode() {return 0;}
+
+	public int getMaxAvailableHeight(View anchor, int yOffset) {return 500;}
+
+	public native void setWidth(int width);
+
+	public native void setHeight(int height);
+
+	public void setOutsideTouchable(boolean touchable) {}
+
+	public void setTouchInterceptor(View.OnTouchListener listener) {}
+
+	public void showAsDropDown(View anchor, int xoff, int yoff, int gravity) {
+		native_showAsDropDown(popover, anchor.widget, xoff, yoff, gravity);
+	}
+
+	public View getContentView() {return contentView;}
 }