path: root/navit/android/src/org/navitproject/navit/NavitGraphics.java

/**
 * Navit, a modular navigation system.
 * Copyright (C) 2005-2008 Navit Team
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 */

package org.navitproject.navit;

import java.io.File;
import java.lang.reflect.Method;
import java.util.ArrayList;

import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.PointF;
import android.graphics.Rect;
import android.os.Build;
import android.os.Handler;
import android.os.Message;
import android.util.FloatMath;
import android.util.Log;
import android.view.ContextMenu;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup.LayoutParams;
import android.view.inputmethod.InputMethodManager;
import android.widget.FrameLayout;
import android.widget.RelativeLayout;


public class NavitGraphics
{
	private NavitGraphics            parent_graphics;
	private ArrayList<NavitGraphics> overlays          = new ArrayList<NavitGraphics>();
	int                              bitmap_w;
	int                              bitmap_h;
	int                              pos_x;
	int                              pos_y;
	int                              pos_wraparound;
	int                              overlay_disabled;
	int                              bgcolor;
	float                            trackball_x, trackball_y;
	View                             view;
	SystemBarTintView                navigationTintView;
	SystemBarTintView                statusTintView;
	FrameLayout                      frameLayout;
	RelativeLayout                   relativelayout;
	NavitCamera                      camera;
	Activity                         activity;

	public static Boolean            in_map            = false;

	// for menu key
	private static long              time_for_long_press               = 300L;
	private static long              interval_for_long_press           = 200L;

	private Handler timer_handler = new Handler();
	
	public void setBackgroundColor(int bgcolor) {
		this.bgcolor = bgcolor;
		if (navigationTintView != null)
			navigationTintView.setBackgroundColor(bgcolor);
		if (statusTintView != null)
			statusTintView.setBackgroundColor(bgcolor);
	}

	public void SetCamera(int use_camera)
	{
		if (use_camera != 0 && camera == null)
		{
			// activity.requestWindowFeature(Window.FEATURE_NO_TITLE);
			camera = new NavitCamera(activity);
			relativelayout.addView(camera);
			relativelayout.bringChildToFront(view);
		}
	}

	protected Rect get_rect()
	{
		Rect ret=new Rect();
		ret.left=pos_x;
		ret.top=pos_y;
		if (pos_wraparound != 0) {
			if (ret.left < 0) {
				ret.left+=parent_graphics.bitmap_w;
			}
			if (ret.top < 0) {
				ret.top+=parent_graphics.bitmap_h;
			}
		}
		ret.right=ret.left+bitmap_w;
		ret.bottom=ret.top+bitmap_h;
		if (pos_wraparound != 0) {
			if (bitmap_w < 0) {
				ret.right=ret.left+bitmap_w+parent_graphics.bitmap_w;
			}
			if (bitmap_h < 0) {
				ret.bottom=ret.top+bitmap_h+parent_graphics.bitmap_h;
			}
		}
		return ret;
	}

	private class NavitView extends View implements Runnable, MenuItem.OnMenuItemClickListener{
		int               touch_mode = NONE;
		float             oldDist    = 0;
		static final int  NONE       = 0;
		static final int  DRAG       = 1;
		static final int  ZOOM       = 2;
		static final int  PRESSED    = 3;

		Method eventGetX = null;
		Method eventGetY = null;
		
		public PointF    mPressedPosition = null;
		
		public NavitView(Context context) {
			super(context);
			try
			{
				eventGetX = android.view.MotionEvent.class.getMethod("getX", int.class);
				eventGetY = android.view.MotionEvent.class.getMethod("getY", int.class);
			}
			catch (Exception e)
			{
				Log.e("NavitGraphics", "Multitouch zoom not supported");
			}
		}

		@Override
		protected void onCreateContextMenu(ContextMenu menu) {
			super.onCreateContextMenu(menu);
			
			menu.setHeaderTitle(Navit._("Position")+"..");
			menu.add(1, 1, NONE, Navit._("Route to here")).setOnMenuItemClickListener(this);
			menu.add(1, 2, NONE, Navit._("Cancel")).setOnMenuItemClickListener(this);
		}

		@Override
		public boolean onMenuItemClick(MenuItem item) {
			switch(item.getItemId()) {
			case 1:
				Message msg = Message.obtain(callback_handler, msg_type.CLB_SET_DISPLAY_DESTINATION.ordinal()
				   , (int)mPressedPosition.x, (int)mPressedPosition.y);
				msg.sendToTarget();
				break;
			}
			return false;
		}

		
		@Override
		protected void onDraw(Canvas canvas)
		{
			super.onDraw(canvas);
			canvas.drawBitmap(draw_bitmap, pos_x, pos_y, null);
			if (overlay_disabled == 0)
			{
				// assume we ARE in map view mode!
				in_map = true;
				for (NavitGraphics overlay : overlays)
				{
					if (overlay.overlay_disabled == 0)
					{
						Rect r=overlay.get_rect();
						canvas.drawBitmap(overlay.draw_bitmap, r.left, r.top, null);
					}
				}				
			}
			else
			{
				if (Navit.show_soft_keyboard)
				{
					if (Navit.mgr != null)
					{
						//Log.e("NavitGraphics", "view -> SHOW SoftInput");
						//Log.e("NavitGraphics", "view mgr=" + String.valueOf(Navit.mgr));
						Navit.mgr.showSoftInput(this, InputMethodManager.SHOW_IMPLICIT);
						Navit.show_soft_keyboard_now_showing = true;
						// clear the variable now, keyboard will stay on screen until backbutton pressed
						Navit.show_soft_keyboard = false;
					}
				}
			}
		}
		
		@Override
		protected void onSizeChanged(int w, int h, int oldw, int oldh)
		{
			Log.e("Navit", "NavitGraphics -> onSizeChanged pixels x=" + w + " pixels y=" + h);
			Log.e("Navit", "NavitGraphics -> onSizeChanged density=" + Navit.metrics.density);
			Log.e("Navit", "NavitGraphics -> onSizeChanged scaledDensity="
					+ Navit.metrics.scaledDensity);
			super.onSizeChanged(w, h, oldw, oldh);
			
			handleResize(w, h);
		}

		public void do_longpress_action()
		{
			Log.e("NavitGraphics", "do_longpress_action enter");
			
			activity.openContextMenu(this);
		}

		private int getActionField(String fieldname, Object obj)
		{
			int ret_value = -999;
			try
			{
				java.lang.reflect.Field field = android.view.MotionEvent.class.getField(fieldname);
				try
				{
					ret_value = field.getInt(obj);
				}
				catch (Exception e)
				{
					e.printStackTrace();
				}
			}
			catch (NoSuchFieldException ex) {}

			return ret_value;
		}
		
		@Override
		public boolean onTouchEvent(MotionEvent event)
		{
			//Log.e("NavitGraphics", "onTouchEvent");
			super.onTouchEvent(event);
			int x = (int) event.getX();
			int y = (int) event.getY();

			int _ACTION_POINTER_UP_ = getActionField("ACTION_POINTER_UP", event);
			int _ACTION_POINTER_DOWN_ = getActionField("ACTION_POINTER_DOWN", event);
			int _ACTION_MASK_ = getActionField("ACTION_MASK", event);

			int switch_value = event.getAction();
			if (_ACTION_MASK_ != -999)
			{
				switch_value = (event.getAction() & _ACTION_MASK_);
			}

			if (switch_value == MotionEvent.ACTION_DOWN)
			{
				touch_mode = PRESSED;
				if (!in_map) ButtonCallback(ButtonCallbackID, 1, 1, x, y); // down
				mPressedPosition = new PointF(x, y);
				postDelayed(this, time_for_long_press);
			}
			else if ((switch_value == MotionEvent.ACTION_UP) || (switch_value == _ACTION_POINTER_UP_))
			{
				Log.e("NavitGraphics", "ACTION_UP");

				if ( touch_mode == DRAG )
				{
					Log.e("NavitGraphics", "onTouch move");

					MotionCallback(MotionCallbackID, x, y);
					ButtonCallback(ButtonCallbackID, 0, 1, x, y); // up
				}
				else if (touch_mode == ZOOM)
				{
					//Log.e("NavitGraphics", "onTouch zoom");

					float newDist = spacing(getFloatValue(event, 0), getFloatValue(event, 1));
					float scale = 0;
					if (newDist > 10f)
					{
						scale = newDist / oldDist;
					}

					if (scale > 1.3)
					{
						// zoom in
						CallbackMessageChannel(1, null);
						//Log.e("NavitGraphics", "onTouch zoom in");
					}
					else if (scale < 0.8)
					{
						// zoom out
						CallbackMessageChannel(2, null);
						//Log.e("NavitGraphics", "onTouch zoom out");
					}
				}
				else if (touch_mode == PRESSED)
				{
					if (in_map) ButtonCallback(ButtonCallbackID, 1, 1, x, y); // down
					ButtonCallback(ButtonCallbackID, 0, 1, x, y); // up
				}
				touch_mode = NONE;
			}
			else if (switch_value == MotionEvent.ACTION_MOVE)
			{
				//Log.e("NavitGraphics", "ACTION_MOVE");

				if (touch_mode == DRAG)
				{
					MotionCallback(MotionCallbackID, x, y);
				}
				else if (touch_mode == ZOOM)
				{
					float newDist = spacing(getFloatValue(event, 0), getFloatValue(event, 1));
					float scale = newDist / oldDist;
					Log.e("NavitGraphics", "New scale = " + scale);
					if (scale > 1.2)
					{
						// zoom in
						CallbackMessageChannel(1, "");
						oldDist = newDist;
						//Log.e("NavitGraphics", "onTouch zoom in");
					}
					else if (scale < 0.8)
					{
						oldDist = newDist;
						// zoom out
						CallbackMessageChannel(2, "");
						//Log.e("NavitGraphics", "onTouch zoom out");
					}
				}
				else if (touch_mode == PRESSED)
				{
					Log.e("NavitGraphics", "Start drag mode");
					if ( spacing(mPressedPosition, new PointF(event.getX(),  event.getY()))  > 20f) {
						ButtonCallback(ButtonCallbackID, 1, 1, x, y); // down
						touch_mode = DRAG;
					}
				}
			}
			else if (switch_value == _ACTION_POINTER_DOWN_)
			{
				//Log.e("NavitGraphics", "ACTION_POINTER_DOWN");
				oldDist = spacing(getFloatValue(event, 0), getFloatValue(event, 1));
				if (oldDist > 2f)
				{
					touch_mode = ZOOM;
					//Log.e("NavitGraphics", "--> zoom");
				}
			}
			return true;
		}

		private float spacing(PointF a, PointF b)
		{
			float x = a.x - b.x;
			float y = a.y - b.y;
			return FloatMath.sqrt(x * x + y * y);
		}

		private PointF getFloatValue(Object instance, Object argument)
		{
			PointF pos = new PointF(0,0); 
			
			if (eventGetX != null && eventGetY != null)
			{
				try
				{
					Float x = (java.lang.Float) eventGetX.invoke(instance, argument);
					Float y = (java.lang.Float) eventGetY.invoke(instance, argument);
					pos.set(x.floatValue(), y.floatValue());
					
				}
				catch (Exception e){}
			}
			return pos;
		}
		
		@Override
		public boolean onKeyDown(int keyCode, KeyEvent event)
		{
			int i;
			String s = null;
			boolean handled = true;
			i = event.getUnicodeChar();
			//Log.e("NavitGraphics", "onKeyDown " + keyCode + " " + i);
			// Log.e("NavitGraphics","Unicode "+event.getUnicodeChar());
			if (i == 0)
			{
				if (keyCode == android.view.KeyEvent.KEYCODE_DEL)
				{
					s = java.lang.String.valueOf((char) 8);
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_MENU)
				{
					if (!in_map)
					{
						// if last menukeypress is less than 0.2 seconds away then count longpress
						if ((System.currentTimeMillis() - Navit.last_pressed_menu_key) < interval_for_long_press)
						{
							Navit.time_pressed_menu_key = Navit.time_pressed_menu_key
									+ (System.currentTimeMillis() - Navit.last_pressed_menu_key);
							//Log.e("NavitGraphics", "press time=" + Navit.time_pressed_menu_key);

							// on long press let softkeyboard popup
							if (Navit.time_pressed_menu_key > time_for_long_press)
							{
								//Log.e("NavitGraphics", "long press menu key!!");
								Navit.show_soft_keyboard = true;
								Navit.time_pressed_menu_key = 0L;
								// need to draw to get the keyboard showing
								this.postInvalidate();
							}
						}
						else
						{
							Navit.time_pressed_menu_key = 0L;
						}
						Navit.last_pressed_menu_key = System.currentTimeMillis();
						// if in menu view:
						// use as OK (Enter) key
						s = java.lang.String.valueOf((char) 13);
						handled = true;
						// dont use menu key here (use it in onKeyUp)
						return handled;
					}
					else
					{
						// if on map view:
						// volume UP
						//s = java.lang.String.valueOf((char) 1);
						handled = false;
						return handled;
					}
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_SEARCH)
				{
					/* Handle event in Main Activity if map is shown */
					if(in_map)
						return false;
					
					s = java.lang.String.valueOf((char) 19);
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_BACK)
				{
					//Log.e("NavitGraphics", "KEYCODE_BACK down");
					s = java.lang.String.valueOf((char) 27);
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_CALL)
				{
					s = java.lang.String.valueOf((char) 3);
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_VOLUME_UP)
				{
					if (!in_map)
					{
						// if in menu view:
						// use as UP key
						s = java.lang.String.valueOf((char) 16);
						handled = true;
					}
					else
					{
						// if on map view:
						// volume UP
						//s = java.lang.String.valueOf((char) 21);
						handled = false;
						return handled;
					}
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_VOLUME_DOWN)
				{
					if (!in_map)
					{
						// if in menu view:
						// use as DOWN key
						s = java.lang.String.valueOf((char) 14);
						handled = true;
					}
					else
					{
						// if on map view:
						// volume DOWN
						//s = java.lang.String.valueOf((char) 4);
						handled = false;
						return handled;
					}
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_DPAD_CENTER)
				{
					s = java.lang.String.valueOf((char) 13);
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_DPAD_DOWN)
				{
					s = java.lang.String.valueOf((char) 14);
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_DPAD_LEFT)
				{
					s = java.lang.String.valueOf((char) 2);
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_DPAD_RIGHT)
				{
					s = java.lang.String.valueOf((char) 6);
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_DPAD_UP)
				{
					s = java.lang.String.valueOf((char) 16);
				}
			} 
			else if (i == 10)
			{
				s = java.lang.String.valueOf((char) 13);
			}

			if (s != null)
			{
				KeypressCallback(KeypressCallbackID, s);
			}
			return handled;
		}

		@Override
		public boolean onKeyUp(int keyCode, KeyEvent event)
		{
			//Log.e("NavitGraphics", "onKeyUp " + keyCode);

			int i;
			String s = null;
			boolean handled = true;
			i = event.getUnicodeChar();

			if (i == 0)
			{
				if (keyCode == android.view.KeyEvent.KEYCODE_VOLUME_UP)
				{
					if (!in_map)
					{
						//s = java.lang.String.valueOf((char) 16);
						handled = true;
						return handled;
					}
					else
					{
						//s = java.lang.String.valueOf((char) 21);
						handled = false;
						return handled;
					}
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_VOLUME_DOWN)
				{
					if (!in_map)
					{
						//s = java.lang.String.valueOf((char) 14);
						handled = true;
						return handled;
					}
					else
					{
						//s = java.lang.String.valueOf((char) 4);
						handled = false;
						return handled;
					}
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_SEARCH) {
					/* Handle event in Main Activity if map is shown */
					if(in_map)
						return false;
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_BACK)
				{
					if (Navit.show_soft_keyboard_now_showing)
					{
						Navit.show_soft_keyboard_now_showing = false;
					}
					//Log.e("NavitGraphics", "KEYCODE_BACK up");
					//s = java.lang.String.valueOf((char) 27);
					handled = true;
					return handled;
				}
				else if (keyCode == android.view.KeyEvent.KEYCODE_MENU)
				{
					if (!in_map)
					{
						if (Navit.show_soft_keyboard_now_showing)
						{
							// if soft keyboard showing on screen, dont use menu button as select key
						}
						else
						{
							// if in menu view:
							// use as OK (Enter) key
							s = java.lang.String.valueOf((char) 13);
							handled = true;
						}
					}
					else
					{
						// if on map view:
						// volume UP
						//s = java.lang.String.valueOf((char) 1);
						handled = false;
						return handled;
					}
				}
			}
			else if(i!=10)
			{
				s = java.lang.String.valueOf((char) i);
			} 
						
			if (s != null)
			{
				KeypressCallback(KeypressCallbackID, s);
			}
			return handled;

		}

		@Override
		public boolean onKeyMultiple (int keyCode, int count, KeyEvent event)
		{
			String s = null;
			if(keyCode == KeyEvent.KEYCODE_UNKNOWN) {
				s=event.getCharacters();
				KeypressCallback(KeypressCallbackID, s);
				return true;
			}
			return super.onKeyMultiple(keyCode, count, event);
		}
		
		@Override
		public boolean onTrackballEvent(MotionEvent event)
		{
			//Log.e("NavitGraphics", "onTrackball " + event.getAction() + " " + event.getX() + " "
			//		+ event.getY());
			String s = null;
			if (event.getAction() == android.view.MotionEvent.ACTION_DOWN)
			{
				s = java.lang.String.valueOf((char) 13);
			}
			if (event.getAction() == android.view.MotionEvent.ACTION_MOVE)
			{
				trackball_x += event.getX();
				trackball_y += event.getY();
				//Log.e("NavitGraphics", "trackball " + trackball_x + " " + trackball_y);
				if (trackball_x <= -1)
				{
					s = java.lang.String.valueOf((char) 2);
					trackball_x += 1;
				}
				if (trackball_x >= 1)
				{
					s = java.lang.String.valueOf((char) 6);
					trackball_x -= 1;
				}
				if (trackball_y <= -1)
				{
					s = java.lang.String.valueOf((char) 16);
					trackball_y += 1;
				}
				if (trackball_y >= 1)
				{
					s = java.lang.String.valueOf((char) 14);
					trackball_y -= 1;
				}
			}
			if (s != null)
			{
				KeypressCallback(KeypressCallbackID, s);
			}
			return true;
		}
		@Override
		protected void onFocusChanged(boolean gainFocus, int direction,
				Rect previouslyFocusedRect)
		{
			super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
			//Log.e("NavitGraphics", "FocusChange " + gainFocus);
		}

		public void run() {
			if (in_map && touch_mode == PRESSED)
			{
				do_longpress_action();
				touch_mode = NONE;
			}
		}
		
	}
	
	private class SystemBarTintView extends View {

		public SystemBarTintView(Context context) {
			super(context);
			this.setBackgroundColor(bgcolor);
		}
		
	}
	
	public NavitGraphics(final Activity activity, NavitGraphics parent, int x, int y, int w, int h,
			int wraparound, int use_camera)
	{
		if (parent == null)
		{
			this.activity = activity;
			view = new NavitView(activity);
			//activity.registerForContextMenu(view);
			view.setClickable(false);
			view.setFocusable(true);
			view.setFocusableInTouchMode(true);
			view.setKeepScreenOn(true);
			frameLayout = new FrameLayout(activity);
			relativelayout = new RelativeLayout(activity);
			frameLayout.addView(relativelayout);
			if (use_camera != 0)
			{
				SetCamera(use_camera);
			}
			relativelayout.addView(view);
			
			navigationTintView = new SystemBarTintView(activity);
			statusTintView = new SystemBarTintView(activity);
			frameLayout.addView(navigationTintView);
			frameLayout.addView(statusTintView);

			activity.setContentView(frameLayout);
			view.requestFocus();
		}
		else
		{
			draw_bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
			bitmap_w = w;
			bitmap_h = h;
			pos_x = x;
			pos_y = y;
			pos_wraparound = wraparound;
			draw_canvas = new Canvas(draw_bitmap);
			parent.overlays.add(this);
		}
		parent_graphics = parent;
	}

	static public enum msg_type {
		CLB_ZOOM_IN, CLB_ZOOM_OUT, CLB_REDRAW, CLB_MOVE, CLB_BUTTON_UP, CLB_BUTTON_DOWN, CLB_SET_DESTINATION
		, CLB_SET_DISPLAY_DESTINATION, CLB_CALL_CMD, CLB_COUNTRY_CHOOSER, CLB_LOAD_MAP, CLB_UNLOAD_MAP, CLB_DELETE_MAP
	};

	static public msg_type[] msg_values = msg_type.values();
	
	public Handler	callback_handler	= new Handler()
		{
			public void handleMessage(Message msg)
			{
				switch (msg_values[msg.what])
				{
				case CLB_ZOOM_IN:
					CallbackMessageChannel(1, "");
					break;
				case CLB_ZOOM_OUT:
					CallbackMessageChannel(2, "");
					break;
				case CLB_MOVE:
					MotionCallback(MotionCallbackID, msg.getData().getInt("x"), msg.getData().getInt("y"));
					break;
				case CLB_SET_DESTINATION:
					String lat = Float.toString(msg.getData().getFloat("lat"));
					String lon = Float.toString(msg.getData().getFloat("lon"));
					String q = msg.getData().getString(("q"));
					CallbackMessageChannel(3, lat + "#" + lon + "#" + q);
					break;
				case CLB_SET_DISPLAY_DESTINATION:
					int x = msg.arg1;
					int y = msg.arg2;
					CallbackMessageChannel(4, "" + x + "#" + y);
					break;
				case CLB_CALL_CMD:
					String cmd = msg.getData().getString(("cmd"));
					CallbackMessageChannel(5, cmd);
					break;
				case CLB_BUTTON_UP:
					ButtonCallback(ButtonCallbackID, 0, 1, msg.getData().getInt("x"), msg.getData().getInt("y")); // up
					break;
				case CLB_BUTTON_DOWN:
					ButtonCallback(ButtonCallbackID, 1, 1, msg.getData().getInt("x"), msg.getData().getInt("y")); // down
					break;
				case CLB_COUNTRY_CHOOSER:
					break;
				case CLB_LOAD_MAP:
					CallbackMessageChannel(6, msg.getData().getString(("title")));
					break;
				case CLB_DELETE_MAP:
					File toDelete = new File( msg.getData().getString(("title")));
					toDelete.delete();
				//fallthrough
				case CLB_UNLOAD_MAP:
					CallbackMessageChannel(7, msg.getData().getString(("title")));
					break;
				}
			}
		};

	public native void SizeChangedCallback(int id, int x, int y);
	public native void PaddingChangedCallback(int id, int left, int right, int top, int bottom);
	public native void KeypressCallback(int id, String s);
	public native int CallbackMessageChannel(int i, String s);
	public native void ButtonCallback(int id, int pressed, int button, int x, int y);
	public native void MotionCallback(int id, int x, int y);
	public native String GetDefaultCountry(int id, String s);
	public static native String[][] GetAllCountries();
	private Canvas	draw_canvas;
	private Bitmap	draw_bitmap;
	private int		SizeChangedCallbackID, PaddingChangedCallbackID, ButtonCallbackID, MotionCallbackID, KeypressCallbackID;
	// private int count;
	
	/**
	 * @brief Handles resize events.
	 * 
	 * This method is called whenever the main View is resized in any way. This is the case when its
	 * {@code onSizeChanged()} event handler fires or when toggling Fullscreen mode.
	 * 
	 * It (re-)evaluates if and where the navigation bar is going to be shown, and calculates the
	 * padding for objects which should not be obstructed.
	 */
	public void handleResize(int w, int h) {
		if (this.parent_graphics != null)
			this.parent_graphics.handleResize(w, h);
		else {
			Log.d("NavitGraphics", String.format("handleResize w=%d h=%d", w, h));
			/*
			 * The code would work on API14+ but is meaningful only on API17+
			 */
			if (Build.VERSION.SDK_INT >= 17) {
				Navit navit = null;
				if (activity instanceof Navit) {
					navit = (Navit) activity;
					/*
					 * Determine visibility of status bar.
					 * The status bar is always visible unless we are in fullscreen mode.
					 */
					final Boolean isStatusShowing = !navit.isFullscreen;

					/*
					 * Determine visibility of navigation bar.
					 * This logic is based on the presence of a hardware menu button and is known to work on
					 * devices which allow switching between hw and sw buttons (OnePlus One running CyanogenMod).
					 */
					final Boolean isNavShowing = !ViewConfiguration.get(navit.getApplication()).hasPermanentMenuKey();

					Log.d("NavitGraphics", String.format("isStatusShowing=%b isNavShowing=%b", isStatusShowing, isNavShowing));

					/*
					 * Determine where the navigation bar would be displayed.
					 * Logic is taken from AOSP RenderSessionImpl.findNavigationBar()
					 * (platform/frameworks/base/tools/layoutlib/bridge/src/com/android/layoutlib/bridge/impl/RenderSessionImpl.java)
					 */
					Boolean isLandscape = (navit.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE);
					final Boolean isNavAtBottom = (!isLandscape) || (navit.getResources().getConfiguration().smallestScreenWidthDp >= 600);
					Log.d("NavitGraphics", String.format("isNavAtBottom=%b (Configuration.smallestScreenWidthDp=%d, isLandscape=%b)", 
							isNavAtBottom, navit.getResources().getConfiguration().smallestScreenWidthDp, isLandscape));

					int left = 0;
					int top = isStatusShowing ? Navit.status_bar_height : 0;
					int right = (isNavShowing && !isNavAtBottom) ? Navit.navigation_bar_width : 0;
					final int bottom = (!(isNavShowing && isNavAtBottom)) ? 0 : isLandscape ? Navit.navigation_bar_height_landscape : Navit.navigation_bar_height;
					
					/* hide tint bars during update to prevent ugly effects */
					statusTintView.setVisibility(View.GONE);
					navigationTintView.setVisibility(View.GONE);
					
					frameLayout.post(new Runnable() {
						@Override
						public void run() {
							statusTintView.setVisibility(isStatusShowing ? View.VISIBLE : View.GONE);
							FrameLayout.LayoutParams statusLayoutParams = new FrameLayout.LayoutParams(LayoutParams.MATCH_PARENT, Navit.status_bar_height, Gravity.TOP);
							/* Prevent tint views from overlapping when navigation is on the right */
							statusLayoutParams.setMargins(0, 0, (isNavShowing && !isNavAtBottom) ? Navit.navigation_bar_width : 0, 0);
							statusTintView.setLayoutParams(statusLayoutParams);
							Log.d("NavitGraphics", String.format("statusTintView: width=%d height=%d",
									statusTintView.getWidth(), statusTintView.getHeight()));

							navigationTintView.setVisibility(isNavShowing ? View.VISIBLE : View.GONE);
							LayoutParams navigationLayoutParams = new FrameLayout.LayoutParams(
									isNavAtBottom ? LayoutParams.MATCH_PARENT : Navit.navigation_bar_width,  // X
											isNavAtBottom ? bottom : LayoutParams.MATCH_PARENT, // Y
													Gravity.BOTTOM | Gravity.RIGHT);
							navigationTintView.setLayoutParams(navigationLayoutParams);
							Log.d("NavitGraphics", String.format("navigationTintView: width=%d height=%d",
									navigationTintView.getWidth(), navigationTintView.getHeight()));
						}
					});

					Log.d("NavitGraphics", String.format("Padding left=%d top=%d right=%d bottom=%d", left, top, right, bottom));

					PaddingChangedCallback(PaddingChangedCallbackID, left, top, right, bottom);
				} else
					Log.e("NavitGraphics", "Main Activity is not a Navit instance, cannot update padding");
			}

			draw_bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
			draw_canvas = new Canvas(draw_bitmap);
			bitmap_w = w;
			bitmap_h = h;
			SizeChangedCallback(SizeChangedCallbackID, w, h);
		}
	}

	/**
	 * @brief Returns whether the device has a hardware menu button.
	 * 
	 * Only Android versions starting with ICS (API version 14) support the API call to detect the presence of a
	 * Menu button. On earlier Android versions, the following assumptions will be made: On API levels up to 10,
	 * this method will always return {@code true}, as these Android versions relied on devices having a physical
	 * Menu button. On API levels 11 through 13 (Honeycomb releases), this method will always return
	 * {@code false}, as Honeycomb was a tablet-only release and did not require devices to have a Menu button.
	 * 
	 * Note that this method is not aware of non-standard mechanisms on some customized builds of Android. For
	 * example, CyanogenMod has an option to add a menu button to the navigation bar. Even with that option,
	 * this method will still return `false`.
	 */
	public boolean hasMenuButton() {
		if (Build.VERSION.SDK_INT <= 10)
			return true;
		else if (Build.VERSION.SDK_INT <= 13)
			return false;
		else
			return ViewConfiguration.get(activity.getApplication()).hasPermanentMenuKey();
	}
	
	public void setSizeChangedCallback(int id)
	{
		SizeChangedCallbackID = id;
	}
	public void setPaddingChangedCallback(int id)
	{
		PaddingChangedCallbackID = id;
	}
	public void setButtonCallback(int id)
	{
		ButtonCallbackID = id;
	}
	public void setMotionCallback(int id)
	{
		MotionCallbackID = id;
		Navit.setMotionCallback(id, this);
	}

	public void setKeypressCallback(int id)
	{
		KeypressCallbackID = id;
		// set callback id also in main intent (for menus)
		Navit.setKeypressCallback(id, this);
	}


	protected void draw_polyline(Paint paint, int c[])
	{
		int i, ndashes;
		float [] intervals;
		//	Log.e("NavitGraphics","draw_polyline");
		paint.setStrokeWidth(c[0]);
		paint.setARGB(c[1],c[2],c[3],c[4]);
		paint.setStyle(Paint.Style.STROKE);
		//paint.setAntiAlias(true);
		//paint.setStrokeWidth(0);
		ndashes=c[5];
		intervals=new float[ndashes+(ndashes%2)];
		for (i = 0; i < ndashes; i++)
			intervals[i]=c[6+i];

		if((ndashes%2)==1)
			intervals[ndashes]=intervals[ndashes-1];
			
		if(ndashes>0)
			paint.setPathEffect(new android.graphics.DashPathEffect(intervals,0.0f));
			
		Path path = new Path();
		path.moveTo(c[6+ndashes], c[7+ndashes]);
		for (i = 8+ndashes; i < c.length; i += 2)
		{
			path.lineTo(c[i], c[i + 1]);
		}
		//global_path.close();
		draw_canvas.drawPath(path, paint);
		paint.setPathEffect(null);
	}

	protected void draw_polygon(Paint paint, int c[])
	{
		//Log.e("NavitGraphics","draw_polygon");
		paint.setStrokeWidth(c[0]);
		paint.setARGB(c[1],c[2],c[3],c[4]);
		paint.setStyle(Paint.Style.FILL);
		//paint.setAntiAlias(true);
		//paint.setStrokeWidth(0);
		Path path = new Path();
		path.moveTo(c[5], c[6]);
		for (int i = 7; i < c.length; i += 2)
		{
			path.lineTo(c[i], c[i + 1]);
		}
		//global_path.close();
		draw_canvas.drawPath(path, paint);
	}
	protected void draw_rectangle(Paint paint, int x, int y, int w, int h)
	{
		//Log.e("NavitGraphics","draw_rectangle");
		Rect r = new Rect(x, y, x + w, y + h);
		paint.setStyle(Paint.Style.FILL);
		paint.setAntiAlias(true);
		//paint.setStrokeWidth(0);
		draw_canvas.drawRect(r, paint);
	}
	protected void draw_circle(Paint paint, int x, int y, int r)
	{
		//Log.e("NavitGraphics","draw_circle");
		//		float fx = x;
		//		float fy = y;
		//		float fr = r / 2;
		paint.setStyle(Paint.Style.STROKE);
		draw_canvas.drawCircle(x, y, r / 2, paint);
	}
	protected void draw_text(Paint paint, int x, int y, String text, int size, int dx, int dy, int bgcolor)
	{
		int oldcolor=paint.getColor();
		Path path=null;
	
		paint.setTextSize(size / 15);
		paint.setStyle(Paint.Style.FILL);

		if (dx != 0x10000 || dy != 0) {
			path = new Path();
			path.moveTo(x, y);
			path.rLineTo(dx, dy);
			paint.setTextAlign(android.graphics.Paint.Align.LEFT);
		}

		if(bgcolor!=0) {
			paint.setStrokeWidth(3);
			paint.setColor(bgcolor);
			paint.setStyle(Paint.Style.STROKE);
			if(path==null) {
				draw_canvas.drawText(text, x, y, paint);
			} else {
				draw_canvas.drawTextOnPath(text, path, 0, 0, paint);
			}
			paint.setStyle(Paint.Style.FILL);
			paint.setColor(oldcolor);
		}

		if(path==null) {
			draw_canvas.drawText(text, x, y, paint);
		} else {
			draw_canvas.drawTextOnPath(text, path, 0, 0, paint);
		}
		paint.clearShadowLayer();
	}
	protected void draw_image(Paint paint, int x, int y, Bitmap bitmap)
	{
		//Log.e("NavitGraphics","draw_image");
		//		float fx = x;
		//		float fy = y;
		draw_canvas.drawBitmap(bitmap, x, y, paint);
	}

	/* takes an image and draws it on the screen as a prerendered maptile
	 * 
	 * 
	 * 
	 * @param paint		Paint object used to draw the image
	 * @param count		the number of points specified 
	 * @param p0x and p0y 	specifying the top left point
	 * @param p1x and p1y 	specifying the top right point
	 * @param p2x and p2y 	specifying the bottom left point, not yet used but kept 
	 * 						for compatibility with the linux port
	 * @param bitmap	Bitmap object holding the image to draw
	 * 
	 * TODO make it work with 4 points specified to make it work for 3D mapview, so it can be used
	 * 		for small but very detailed maps as well as for large maps with very little detail but large
	 * 		coverage.
	 * TODO make it work with rectangular tiles as well ?
	 */
	protected void draw_image_warp(Paint paint, int count, int p0x, int p0y, int p1x, int p1y, int p2x, int p2y, Bitmap bitmap)
	{
	
		float width;
		float scale;
		float deltaY;
		float deltaX;
		float angle;
		Matrix matrix;	
	
		if (count == 3)
		{			
			matrix = new Matrix();
			deltaX = p1x - p0x;
			deltaY = p1y - p0y;
			width = (float) (Math.sqrt((deltaX * deltaX) + (deltaY * deltaY)));			
			angle = (float) (Math.atan2(deltaY, deltaX) * 180d / Math.PI);
			scale = width / bitmap.getWidth();
			matrix.preScale(scale, scale);
			matrix.postTranslate(p0x, p0y);			
			matrix.postRotate(angle, p0x, p0y);
			draw_canvas.drawBitmap(bitmap, matrix, paint);
		}
	}

	/* These constants must be synchronized with enum draw_mode_num in graphics.h. */
	public static final int draw_mode_begin = 0;
	public static final int draw_mode_end = 1;

	protected void draw_mode(int mode)
	{
		//Log.e("NavitGraphics", "draw_mode mode=" + mode + " parent_graphics="
		//		+ String.valueOf(parent_graphics));

		if (mode == draw_mode_end) {
			if (parent_graphics == null) {
				view.invalidate();
			} else {
				parent_graphics.view.invalidate(get_rect());
			}
		}
		if (mode == draw_mode_begin && parent_graphics != null) {
			draw_bitmap.eraseColor(0);
		}

	}
	protected void draw_drag(int x, int y)
	{
		//Log.e("NavitGraphics","draw_drag");
		pos_x = x;
		pos_y = y;
	}
	protected void overlay_disable(int disable)
	{
		Log.e("NavitGraphics","overlay_disable: " + disable + "Parent: " + (parent_graphics != null));
		// assume we are NOT in map view mode!
		if (parent_graphics == null)
			in_map = (disable==0);
		if (overlay_disabled != disable) {
			overlay_disabled = disable;
			if (parent_graphics != null) {
				parent_graphics.view.invalidate(get_rect());
			}
		}
	}

	protected void overlay_resize(int x, int y, int w, int h, int wraparound)
	{
		//Log.e("NavitGraphics","overlay_resize");
		draw_bitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
		bitmap_w = w;
		bitmap_h = h;
		pos_x = x;
		pos_y = y;
		pos_wraparound = wraparound;
		draw_canvas.setBitmap(draw_bitmap);
	}

	public static String getLocalizedString(String text)
	{
		String ret = CallbackLocalizedString(text);
		//Log.e("NavitGraphics", "callback_handler -> lozalized string=" + ret);
		return ret;
	}




	/**
	 * get localized string
	 */
	public static native String CallbackLocalizedString(String s);

}