package com.catglo.taxidroid;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.Display;
import android.view.Gravity;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewConfiguration;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.ListView;
public class OrderListView extends ListView {
// private static final int EDIT_ID = 0;
// private static final int DELETE_ID = 1;
private View dragView;
private int dragPoint;
private int coordOffset;
private final Context context;
private int dragPos;
private int firstDragPos;
private int height;
private int upperBound;
private int lowerBound;
private final int touchSlop;
private WindowManager windowManager;
private WindowManager.LayoutParams windowParams;
private final Rect tempRect = new Rect();
private Bitmap dragBitmap;
@SuppressWarnings("unused")
private DragListener dragListener;
private DropListener dropListener;
@SuppressWarnings("unused")
private RemoveListener removeListener;
private final int listItemsHeight;
void edit(final long l) {
}
void delete(final long l) {
}
public void setDragListener(final DragListener l) {
dragListener = l;
}
public void setDropListener(final DropListener l) {
dropListener = l;
}
public void setRemoveListener(final RemoveListener l) {
removeListener = l;
}
public interface DragListener {
void drag(int from, int to);
}
public interface DropListener {
void drop(int from, int to);
}
public interface RemoveListener {
void remove(int which);
}
LinearLayout tableRowLayout;
public OrderListView(final Context context, final AttributeSet attrs) {
super(context, attrs);
this.context = context;
// Distance a touch can wander before we think the user is
// scrolling in pixels
this.touchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
Display display = ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
if (display.getWidth() > 320 || display.getHeight() > 480){
listItemsHeight = 80;//60;
} else {
listItemsHeight = 64;//40;
}
}
private void adjustScrollBounds(final int y) {
if (y >= height / 3) {
upperBound = height / 3;
}
if (y <= height * 2 / 3) {
lowerBound = height * 2 / 3;
}
}
private void stopDragging() {
final WindowManager wm = (WindowManager) context.getSystemService("window");
wm.removeView(dragView);
dragView = null;
if (dragBitmap != null) {
dragBitmap.recycle();
dragBitmap = null;
}
}
private void unExpandViews() {
for (int i = 0;; i++) {
View v = getChildAt(i);
if (v == null) {
/*
* if (deletion) { // HACK force update of mItemCount int position = getFirstVisiblePosition(); int y =
* getChildAt(0).getTop(); setAdapter(getAdapter()); setSelectionFromTop(position, y); // end hack }
*/
layoutChildren(); // force children to be recreated where needed
v = getChildAt(i);
if (v == null) {
break;
}
}
final ViewGroup.LayoutParams params = v.getLayoutParams();
params.height = listItemsHeight;// 64;
v.setLayoutParams(params);
v.setVisibility(View.VISIBLE);
}
}
@Override
public boolean onTouchEvent(final MotionEvent event) {
if (dragView != null) {
final int action = event.getAction();
switch (action) {
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
// Rect r = tempRect;
// dragView.getDrawingRect(r);
stopDragging();
// if (mRemoveMode == SLIDE && ev.getX() > r.right * 3 / 4) {
// if (mRemoveListener != null) {
// mRemoveListener.remove(mFirstDragPos);
// }
// unExpandViews(true);
// } else {
if (dropListener != null && dragPos >= 0 && dragPos < getCount()) {
dropListener.drop(firstDragPos, dragPos);
}
unExpandViews();
// }
break;
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_MOVE:
final int x = (int) event.getX();
final int y = (int) event.getY();
final int itemnum = getItemForPosition(y);
doDragView(x, y);
if (itemnum >= 0) {
// if (action == MotionEvent.ACTION_DOWN || itemnum != dragPos) {
// if (dragListener != null) {
// dragListener.drag(dragPos, itemnum);
// }
// }
dragPos = itemnum;
doExpansion();
}
int speed = 0;
adjustScrollBounds(y);
if (y > lowerBound) {
// scroll the list up a bit
speed = y > (height + lowerBound) / 2 ? listItemsHeight / 4 : 4;
} else if (y < upperBound) {
// scroll the list down a bit
speed = y < upperBound / 2 ? -(listItemsHeight / 4)/* 16 */
: -4;
}
if (speed != 0) {
int ref = pointToPosition(0, height / 2);
if (ref == AdapterView.INVALID_POSITION) {
// we hit a divider or an invisible view, check
// somewhere else
ref = pointToPosition(0, height / 2 + getDividerHeight() + listItemsHeight);// 64);
}
final View v = getChildAt(ref - getFirstVisiblePosition());
if (v != null) {
final int pos = v.getTop();
setSelectionFromTop(ref, pos - speed);
}
}
// dragView=null;
break;
}
return true;
} else return super.onTouchEvent(event);
// return true; //Otherwise we get multiple select for click on no list
// item
}
private void doExpansion() {
int childnum = dragPos - getFirstVisiblePosition();
if (dragPos > firstDragPos) {
childnum++;
}
final View first = getChildAt(firstDragPos - getFirstVisiblePosition());
for (int i = 0;; i++) {
final View vv = getChildAt(i);
if (vv == null) {
break;
}
int height = listItemsHeight;// 64; //why 64??
int visibility = View.VISIBLE;
if (vv.equals(first)) {
// processing the item that is being dragged
if (dragPos == firstDragPos) {
// hovering over the original location
visibility = View.INVISIBLE;
} else {
// not hovering over it
height = 1;
}
} else if (i == childnum) {
if (dragPos < getCount() - 1) {
height = listItemsHeight * 2;// 128;//why 128??
}
}
final ViewGroup.LayoutParams params = vv.getLayoutParams();
params.height = height;
vv.setLayoutParams(params);
vv.setVisibility(visibility);
}
}
private int myPointToPosition(final int x, final int y) {
final Rect frame = tempRect;
final int count = getChildCount();
for (int i = count - 1; i >= 0; i--) {
final View child = getChildAt(i);
child.getHitRect(frame);
if (frame.contains(x, y)) return getFirstVisiblePosition() + i;
}
return INVALID_POSITION;
}
private int getItemForPosition(final int y) {
final int adjustedy = y - dragPoint - listItemsHeight / 2;// 32; //why 32??
int pos = myPointToPosition(0, adjustedy);
if (pos >= 0) {
if (pos <= firstDragPos) {
pos += 1;
}
} else if (adjustedy < 0) {
pos = 0;
}
return pos;
}
private void doDragView(final int x, final int y) {
// PizzaDilevery.text.setText("y="+(y- dragPoint +
// coordOffset)+" "+dragPoint + " "+coordOffset);
// Clip drawing of the dragged item at the top of the list, otherwise it
// looks a bit weird as I can cover the buttons
// at the top get covered by the drag box, maybe I will make it turn in
// to a little cloud to indicate it's delete-able in the future
if (y - dragPoint + coordOffset <= coordOffset) {
windowParams.y = coordOffset;
} else {
windowParams.y = y - dragPoint + coordOffset;
}
windowManager.updateViewLayout(dragView, windowParams);
}
@Override
public boolean onInterceptTouchEvent(final MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
final int x = (int) event.getX();
final int y = (int) event.getY();
final int itemnum = pointToPosition(x, y);
if (itemnum == AdapterView.INVALID_POSITION) {
break;
}
if (x < listItemsHeight + 4) {
// ViewGroup item = (ViewGroup) getChildAt(itemnum -
// getFirstVisiblePosition());
final View item = getChildAt(itemnum - getFirstVisiblePosition());
dragPoint = y - item.getTop();
coordOffset = (int) event.getRawY() - y;
item.setDrawingCacheEnabled(true);
// Create a copy of the drawing cache so that it does not get
// recycled
// by the framework when the list tries to clean up memory
final Bitmap bitmap = Bitmap.createBitmap(item.getDrawingCache());
startDragging(bitmap, y);
dragPos = itemnum;
firstDragPos = dragPos;
height = getHeight();
final int touchSlop = this.touchSlop;
upperBound = Math.min(y - touchSlop, height / 3);
lowerBound = Math.max(y + touchSlop, height * 2 / 3);
break;
}
}
return super.onInterceptTouchEvent(event);
}
private void startDragging(final Bitmap bm, final int y) {
windowParams = new WindowManager.LayoutParams();
windowParams.gravity = Gravity.TOP;
windowParams.x = 0;
windowParams.y = y - dragPoint + coordOffset;
windowParams.height = android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
windowParams.width = android.view.ViewGroup.LayoutParams.WRAP_CONTENT;
windowParams.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
| WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE | WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
| WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN;
windowParams.format = PixelFormat.TRANSLUCENT;
windowParams.windowAnimations = 0;
final ImageView v = new ImageView(context);
// Bitmap bbm = BitmapFactory.decodeResource(context.getResources(),
// android.R.drawable.ic_menu_add);
v.setBackgroundColor(Color.LTGRAY);
v.setImageBitmap(bm);
if (dragBitmap != null) {
dragBitmap.recycle();
}
dragBitmap = bm;
windowManager = (WindowManager) context.getSystemService("window");
// windowManager.
windowManager.addView(v, windowParams);
dragView = v;
}
}