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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 com.android.launcher.R;
import android.content.ComponentName;
import android.content.Context;
import android.graphics.Paint;
import android.graphics.PorterDuff;
import android.graphics.PorterDuffColorFilter;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ImageView;
/**
* Implements a DropTarget which allows applications to be dropped on it,
* in order to launch the application info for that app.
*/
public class ApplicationInfoDropTarget extends ImageView implements DropTarget, DragController.DragListener {
private Launcher mLauncher;
private boolean mActive = false;
/**
* If true, this View responsible for managing its own visibility, and that of its handle.
* This is generally the case, but it will be set to false when this is part of the
* Contextual Action Bar.
*/
private boolean mManageVisibility = true;
/** The view that this view should appear in the place of. */
private View mHandle = null;
private final Paint mPaint = new Paint();
public ApplicationInfoDropTarget(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public ApplicationInfoDropTarget(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
/**
* Set the color that will be used as a filter over objects dragged over this object.
*/
public void setDragColor(int color) {
mPaint.setColorFilter(new PorterDuffColorFilter(color, PorterDuff.Mode.SRC_ATOP));
}
public boolean acceptDrop(DragSource source, int x, int y, int xOffset, int yOffset,
DragView dragView, Object dragInfo) {
// acceptDrop is called just before onDrop. We do the work here, rather than
// in onDrop, because it allows us to reject the drop (by returning false)
// so that the object being dragged isn't removed from the home screen.
ComponentName componentName = null;
if (dragInfo instanceof ApplicationInfo) {
componentName = ((ApplicationInfo)dragInfo).componentName;
} else if (dragInfo instanceof ShortcutInfo) {
componentName = ((ShortcutInfo)dragInfo).intent.getComponent();
}
mLauncher.startApplicationDetailsActivity(componentName);
return false;
}
public void onDrop(DragSource source, int x, int y, int xOffset, int yOffset,
DragView dragView, Object dragInfo) {
}
public void onDragEnter(DragSource source, int x, int y, int xOffset, int yOffset,
DragView dragView, Object dragInfo) {
dragView.setPaint(mPaint);
}
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) {
dragView.setPaint(null);
}
public void onDragStart(DragSource source, Object info, int dragAction) {
if (info != null) {
final int itemType = ((ItemInfo)info).itemType;
mActive = (itemType == LauncherSettings.Favorites.ITEM_TYPE_APPLICATION);
if (mManageVisibility) {
// Only show the info icon when an application is selected
if (mActive) {
setVisibility(VISIBLE);
}
mHandle.setVisibility(INVISIBLE);
}
}
}
public boolean isDropEnabled() {
return mActive;
}
public void onDragEnd() {
if (mActive) {
mActive = false;
}
if (mManageVisibility) {
setVisibility(GONE);
mHandle.setVisibility(VISIBLE);
}
}
@Override
public void getHitRect(Rect outRect) {
super.getHitRect(outRect);
if (LauncherApplication.isScreenXLarge()) {
// TODO: This is a temporary hack. mManageVisiblity = false when you're in CAB mode.
// In that case, this icon is more tightly spaced next to the delete icon so we want
// it to have a smaller drag region. When the new drag&drop system comes in, we'll
// dispatch the drag/drop by calculating what target you're overlapping
final int minPadding = R.dimen.delete_zone_min_padding;
final int maxPadding = R.dimen.delete_zone_max_padding;
final int outerDragPadding =
getResources().getDimensionPixelSize(R.dimen.delete_zone_size);
final int innerDragPadding = getResources().getDimensionPixelSize(
mManageVisibility ? maxPadding : minPadding);
outRect.top -= outerDragPadding;
outRect.left -= innerDragPadding;
outRect.bottom += outerDragPadding;
outRect.right += outerDragPadding;
}
}
void setLauncher(Launcher launcher) {
mLauncher = launcher;
}
void setHandle(View view) {
mHandle = view;
}
void setManageVisibility(boolean value) {
mManageVisibility = value;
}
@Override
public DropTarget getDropTargetDelegate(DragSource source, int x, int y, int xOffset, int yOffset,
DragView dragView, Object dragInfo) {
return null;
}
}
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