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/*
* Copyright (C) 2010 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.android.launcher2;
import android.content.Context;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.widget.TextView;
/**
* Implements a DropTarget which allows applications to be dropped on it,
* in order to launch the application info for that app.
*/
public class IconDropTarget extends TextView implements DropTarget, DragController.DragListener {
protected Launcher mLauncher;
/**
* If true, this View responsible for managing its own visibility, and that of its overlapping
* views. This is generally the case, but it will be set to false when this is part of the
* Contextual Action Bar.
*/
protected boolean mDragAndDropEnabled;
/** Whether this drop target is active for the current drag */
protected boolean mActive;
/** The views that this view should appear in the place of. */
protected View[] mOverlappingViews = null;
/** The paint applied to the drag view on hover */
protected final Paint mHoverPaint = new Paint();
/** Drag zone padding [T, R, B, L] */
protected final int mDragPadding[] = new int[4];
public IconDropTarget(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public IconDropTarget(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mDragAndDropEnabled = true;
}
protected void setDragPadding(int t, int r, int b, int l) {
mDragPadding[0] = t;
mDragPadding[1] = r;
mDragPadding[2] = b;
mDragPadding[3] = l;
}
void setLauncher(Launcher launcher) {
mLauncher = launcher;
}
void setOverlappingView(View view) {
mOverlappingViews = new View[] { view };
}
void setOverlappingViews(View[] views) {
mOverlappingViews = views;
}
void setDragAndDropEnabled(boolean enabled) {
mDragAndDropEnabled = enabled;
}
public boolean acceptDrop(DragSource source, int x, int y, int xOffset, int yOffset,
DragView dragView, Object dragInfo) {
return false;
}
public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset,
DragView dragView, Object dragInfo) {
// Do nothing
}
public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset,
DragView dragView, Object dragInfo) {
if (mDragAndDropEnabled) {
dragView.setPaint(mHoverPaint);
}
}
public void onDragOver(DragSource source, int x, int y, int xOffset, int yOffset,
DragView dragView, Object dragInfo) {
// Do nothing
}
public void onDragExit(DragSource source, int x, int y, int xOffset, int yOffset,
DragView dragView, Object dragInfo) {
if (mDragAndDropEnabled) {
dragView.setPaint(null);
}
}
public void onDragStart(DragSource source, Object info, int dragAction) {
// Do nothing
}
public boolean isDropEnabled() {
return mDragAndDropEnabled && mActive;
}
public void onDragEnd() {
// Do nothing
}
@Override
public void getHitRect(Rect outRect) {
super.getHitRect(outRect);
if (LauncherApplication.isScreenLarge()) {
outRect.top -= mDragPadding[0];
outRect.right += mDragPadding[1];
outRect.bottom += mDragPadding[2];
outRect.left -= mDragPadding[3];
}
}
@Override
public DropTarget getDropTargetDelegate(DragSource source, int x, int y, int xOffset,
int yOffset, DragView dragView, Object dragInfo) {
return null;
}
}
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