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/*
* Copyright (C) 2015 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.launcher3.widget;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.CancellationSignal;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnLayoutChangeListener;
import android.view.ViewGroup;
import android.view.ViewPropertyAnimator;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.android.launcher3.BaseActivity;
import com.android.launcher3.DeviceProfile;
import com.android.launcher3.R;
import com.android.launcher3.SimpleOnStylusPressListener;
import com.android.launcher3.StylusEventHelper;
import com.android.launcher3.WidgetPreviewLoader;
import com.android.launcher3.graphics.DrawableFactory;
import com.android.launcher3.model.WidgetItem;
/**
* Represents the individual cell of the widget inside the widget tray. The preview is drawn
* horizontally centered, and scaled down if needed.
*
* This view does not support padding. Since the image is scaled down to fit the view, padding will
* further decrease the scaling factor. Drag-n-drop uses the view bounds for showing a smooth
* transition from the view to drag view, so when adding padding support, DnD would need to
* consider the appropriate scaling factor.
*/
public class WidgetCell extends LinearLayout implements OnLayoutChangeListener {
private static final String TAG = "WidgetCell";
private static final boolean DEBUG = false;
private static final int FADE_IN_DURATION_MS = 90;
/** Widget cell width is calculated by multiplying this factor to grid cell width. */
private static final float WIDTH_SCALE = 2.6f;
/** Widget preview width is calculated by multiplying this factor to the widget cell width. */
private static final float PREVIEW_SCALE = 0.8f;
protected int mPresetPreviewSize;
private int mCellSize;
private WidgetImageView mWidgetImage;
private TextView mWidgetName;
private TextView mWidgetDims;
protected WidgetItem mItem;
private WidgetPreviewLoader mWidgetPreviewLoader;
private StylusEventHelper mStylusEventHelper;
protected CancellationSignal mActiveRequest;
private boolean mAnimatePreview = true;
protected final BaseActivity mActivity;
public WidgetCell(Context context) {
this(context, null);
}
public WidgetCell(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public WidgetCell(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mActivity = BaseActivity.fromContext(context);
mStylusEventHelper = new StylusEventHelper(new SimpleOnStylusPressListener(this), this);
setContainerWidth();
setWillNotDraw(false);
setClipToPadding(false);
setAccessibilityDelegate(mActivity.getAccessibilityDelegate());
}
private void setContainerWidth() {
DeviceProfile profile = mActivity.getDeviceProfile();
mCellSize = (int) (profile.cellWidthPx * WIDTH_SCALE);
mPresetPreviewSize = (int) (mCellSize * PREVIEW_SCALE);
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mWidgetImage = (WidgetImageView) findViewById(R.id.widget_preview);
mWidgetName = ((TextView) findViewById(R.id.widget_name));
mWidgetDims = ((TextView) findViewById(R.id.widget_dims));
}
/**
* Called to clear the view and free attached resources. (e.g., {@link Bitmap}
*/
public void clear() {
if (DEBUG) {
Log.d(TAG, "reset called on:" + mWidgetName.getText());
}
mWidgetImage.animate().cancel();
mWidgetImage.setBitmap(null, null);
mWidgetName.setText(null);
mWidgetDims.setText(null);
if (mActiveRequest != null) {
mActiveRequest.cancel();
mActiveRequest = null;
}
}
public void applyFromCellItem(WidgetItem item, WidgetPreviewLoader loader) {
mItem = item;
mWidgetName.setText(mItem.label);
mWidgetDims.setText(getContext().getString(R.string.widget_dims_format,
mItem.spanX, mItem.spanY));
mWidgetDims.setContentDescription(getContext().getString(
R.string.widget_accessible_dims_format, mItem.spanX, mItem.spanY));
mWidgetPreviewLoader = loader;
if (item.activityInfo != null) {
setTag(new PendingAddShortcutInfo(item.activityInfo));
} else {
setTag(new PendingAddWidgetInfo(item.widgetInfo));
}
}
public WidgetImageView getWidgetView() {
return mWidgetImage;
}
public void setAnimatePreview(boolean shouldAnimate) {
mAnimatePreview = shouldAnimate;
}
public void applyPreview(Bitmap bitmap) {
applyPreview(bitmap, true);
}
public void applyPreview(Bitmap bitmap, boolean animate) {
if (bitmap != null) {
mWidgetImage.setBitmap(bitmap,
DrawableFactory.get(getContext()).getBadgeForUser(mItem.user, getContext()));
if (mAnimatePreview) {
mWidgetImage.setAlpha(0f);
ViewPropertyAnimator anim = mWidgetImage.animate();
anim.alpha(1.0f).setDuration(FADE_IN_DURATION_MS);
} else {
mWidgetImage.setAlpha(1f);
}
}
}
public void ensurePreview() {
ensurePreview(true);
}
public void ensurePreview(boolean animate) {
if (mActiveRequest != null) {
return;
}
mActiveRequest = mWidgetPreviewLoader.getPreview(
mItem, mPresetPreviewSize, mPresetPreviewSize, this, animate);
}
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft,
int oldTop, int oldRight, int oldBottom) {
removeOnLayoutChangeListener(this);
ensurePreview();
}
@Override
public boolean onTouchEvent(MotionEvent ev) {
boolean handled = super.onTouchEvent(ev);
if (mStylusEventHelper.onMotionEvent(ev)) {
return true;
}
return handled;
}
/**
* Helper method to get the string info of the tag.
*/
private String getTagToString() {
if (getTag() instanceof PendingAddWidgetInfo ||
getTag() instanceof PendingAddShortcutInfo) {
return getTag().toString();
}
return "";
}
@Override
public void setLayoutParams(ViewGroup.LayoutParams params) {
params.width = params.height = mCellSize;
super.setLayoutParams(params);
}
@Override
public CharSequence getAccessibilityClassName() {
return WidgetCell.class.getName();
}
}
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