/*
* This is a modified version of a class from the Android Open Source Project.
* The original copyright and license information follows. Copyright (C) 2008
* The Android Open Source Project Licensed under the Apache License, Version
* 2.0 (the "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
* or agreed to in writing, software distributed under the License is
* distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the specific language
* governing permissions and limitations under the License.
*/
package com.iwedia.gui.widgets;
import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
/**
* A ViewGroup that coordinates dragging across its dscendants.
* <p>
* This class used DragLayer in the Android Launcher activity as a model. It is
* a bit different in several respects: (1) It extends MyAbsoluteLayout rather
* than FrameLayout; (2) it implements DragSource and DropTarget methods that
* were done in a separate Workspace class in the Launcher.
*/
public class DragLayer extends MyAbsoluteLayout implements DragSource,
DropTarget {
DragController mDragController;
/**
* Used to create a new DragLayer from XML.
*
* @param context
* The application's context.
* @param attrs
* The attribtues set containing the Workspace's customization
* values.
*/
public DragLayer(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setDragController(DragController controller) {
mDragController = controller;
}
@Override
public boolean dispatchKeyEvent(KeyEvent event) {
return mDragController.dispatchKeyEvent(event)
|| super.dispatchKeyEvent(event);
}
@Override
public boolean onInterceptTouchEvent(MotionEvent ev) {
return mDragController.onInterceptTouchEvent(ev);
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
return mDragController.onTouchEvent(ev);
}
@Override
public boolean dispatchUnhandledMove(View focused, int direction) {
return mDragController.dispatchUnhandledMove(focused, direction);
}
/**
*/
// DragSource interface methods
/**
* This method is called to determine if the DragSource has something to
* drag.
*
* @return True if there is something to drag
*/
public boolean allowDrag() {
// In this simple demo, any view that you touch can be dragged.
return true;
}
/**
* setDragController
*/
/* setDragController is already defined. See above. */
/**
* onDropCompleted
*/
public void onDropCompleted(View target, boolean success) {
// Log.d("ON DRAG COMPLETED", "ENTERED");
//
// int[] locationOnScreen = new int[2];
// target.getLocationOnScreen(locationOnScreen);
//
// Log.d("END X", locationOnScreen[0] + "");
// Log.d("END Y", locationOnScreen[1] + "");
}
/**
*/
// DropTarget interface implementation
/**
* Handle an object being dropped on the DropTarget. This is the where a
* dragged view gets repositioned at the end of a drag.
*
* @param source
* DragSource where the drag started
* @param x
* X coordinate of the drop location
* @param y
* Y coordinate of the drop location
* @param xOffset
* Horizontal offset with the object being dragged where the original
* touch happened
* @param yOffset
* Vertical offset with the object being dragged where the original
* touch happened
* @param dragView
* The DragView that's being dragged around on screen.
* @param dragInfo
* Data associated with the object being dragged
*/
public void onDrop(DragSource source, int x, int y, int xOffset,
int yOffset, DragView dragView, Object dragInfo) {
View v = (View) dragInfo;
int w = v.getWidth();
int h = v.getHeight();
int left = x - xOffset;
int top = y - yOffset;
DragLayer.LayoutParams lp = new DragLayer.LayoutParams(w, h, left, top);
this.updateViewLayout(v, lp);
}
public void onDragEnter(DragSource source, int x, int y, int xOffset,
int yOffset, DragView dragView, Object dragInfo) {
}
public void onDragOver(DragSource source, int x, int y, int xOffset,
int yOffset, DragView dragView, Object dragInfo) {
}
public void onDragExit(DragSource source, int x, int y, int xOffset,
int yOffset, DragView dragView, Object dragInfo) {
}
/**
* Check if a drop action can occur at, or near, the requested location.
* This may be called repeatedly during a drag, so any calls should return
* quickly.
*
* @param source
* DragSource where the drag started
* @param x
* X coordinate of the drop location
* @param y
* Y coordinate of the drop location
* @param xOffset
* Horizontal offset with the object being dragged where the original
* touch happened
* @param yOffset
* Vertical offset with the object being dragged where the original
* touch happened
* @param dragView
* The DragView that's being dragged around on screen.
* @param dragInfo
* Data associated with the object being dragged
* @return True if the drop will be accepted, false otherwise.
*/
public boolean acceptDrop(DragSource source, int x, int y, int xOffset,
int yOffset, DragView dragView, Object dragInfo) {
return true;
}
/**
* Estimate the surface area where this object would land if dropped at the
* given location.
*
* @param source
* DragSource where the drag started
* @param x
* X coordinate of the drop location
* @param y
* Y coordinate of the drop location
* @param xOffset
* Horizontal offset with the object being dragged where the original
* touch happened
* @param yOffset
* Vertical offset with the object being dragged where the original
* touch happened
* @param dragView
* The DragView that's being dragged around on screen.
* @param dragInfo
* Data associated with the object being dragged
* @param recycle
* {@link Rect} object to be possibly recycled.
* @return Estimated area that would be occupied if object was dropped at
* the given location. Should return null if no estimate is found,
* or if this target doesn't provide estimations.
*/
public Rect estimateDropLocation(DragSource source, int x, int y,
int xOffset, int yOffset, DragView dragView, Object dragInfo,
Rect recycle) {
return null;
}
/**
*/
// More methods
/**
* Show a string on the screen via Toast.
*
* @param msg
* String
* @return void
*/
} // end class