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package com.android.launcher3.widget;
import android.appwidget.AppWidgetHostView;
import android.appwidget.AppWidgetManager;
import android.content.Context;
import android.graphics.Rect;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import com.android.launcher3.AppWidgetResizeFrame;
import com.android.launcher3.DragController.DragListener;
import com.android.launcher3.DragLayer;
import com.android.launcher3.DragSource;
import com.android.launcher3.Launcher;
import com.android.launcher3.LauncherAppWidgetProviderInfo;
import com.android.launcher3.compat.AppWidgetManagerCompat;
import com.android.launcher3.util.Thunk;
public class WidgetHostViewLoader implements DragListener {
/* Runnables to handle inflation and binding. */
@Thunk Runnable mInflateWidgetRunnable = null;
private Runnable mBindWidgetRunnable = null;
// TODO: technically, this class should not have to know the existence of the launcher.
@Thunk Launcher mLauncher;
@Thunk Handler mHandler;
@Thunk final View mView;
@Thunk final PendingAddWidgetInfo mInfo;
// Widget id generated for binding a widget host view or -1 for invalid id. The id is
// not is use as long as it is stored here and can be deleted safely. Once its used, this value
// to be set back to -1.
@Thunk int mWidgetLoadingId = -1;
public WidgetHostViewLoader(Launcher launcher, View view) {
mLauncher = launcher;
mHandler = new Handler();
mView = view;
mInfo = (PendingAddWidgetInfo) view.getTag();
}
@Override
public void onDragStart(DragSource source, Object info, int dragAction) { }
@Override
public void onDragEnd() {
// Cleanup up preloading state.
mLauncher.getDragController().removeDragListener(this);
mHandler.removeCallbacks(mBindWidgetRunnable);
mHandler.removeCallbacks(mInflateWidgetRunnable);
// Cleanup widget id
if (mWidgetLoadingId != -1) {
mLauncher.getAppWidgetHost().deleteAppWidgetId(mWidgetLoadingId);
mWidgetLoadingId = -1;
}
// The widget was inflated and added to the DragLayer -- remove it.
if (mInfo.boundWidget != null) {
mLauncher.getDragLayer().removeView(mInfo.boundWidget);
mLauncher.getAppWidgetHost().deleteAppWidgetId(mInfo.boundWidget.getAppWidgetId());
mInfo.boundWidget = null;
}
}
/**
* Start preloading the widget.
*/
public boolean preloadWidget() {
final LauncherAppWidgetProviderInfo pInfo = mInfo.info;
if (pInfo.isCustomWidget) {
return false;
}
final Bundle options = getDefaultOptionsForWidget(mLauncher, mInfo);
// If there is a configuration activity, do not follow thru bound and inflate.
if (pInfo.configure != null) {
mInfo.bindOptions = options;
return false;
}
mBindWidgetRunnable = new Runnable() {
@Override
public void run() {
mWidgetLoadingId = mLauncher.getAppWidgetHost().allocateAppWidgetId();
if(AppWidgetManagerCompat.getInstance(mLauncher).bindAppWidgetIdIfAllowed(
mWidgetLoadingId, pInfo, options)) {
// Widget id bound. Inflate the widget.
mHandler.post(mInflateWidgetRunnable);
}
}
};
mInflateWidgetRunnable = new Runnable() {
@Override
public void run() {
if (mWidgetLoadingId == -1) {
return;
}
AppWidgetHostView hostView = mLauncher.getAppWidgetHost().createView(
(Context) mLauncher, mWidgetLoadingId, pInfo);
mInfo.boundWidget = hostView;
// We used up the widget Id in binding the above view.
mWidgetLoadingId = -1;
hostView.setVisibility(View.INVISIBLE);
int[] unScaledSize = mLauncher.getWorkspace().estimateItemSize(mInfo, false);
// We want the first widget layout to be the correct size. This will be important
// for width size reporting to the AppWidgetManager.
DragLayer.LayoutParams lp = new DragLayer.LayoutParams(unScaledSize[0],
unScaledSize[1]);
lp.x = lp.y = 0;
lp.customPosition = true;
hostView.setLayoutParams(lp);
mLauncher.getDragLayer().addView(hostView);
mView.setTag(mInfo);
}
};
mHandler.post(mBindWidgetRunnable);
return true;
}
public static Bundle getDefaultOptionsForWidget(Launcher launcher, PendingAddWidgetInfo info) {
Bundle options = null;
Rect rect = new Rect();
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) {
AppWidgetResizeFrame.getWidgetSizeRanges(launcher, info.spanX, info.spanY, rect);
Rect padding = AppWidgetHostView.getDefaultPaddingForWidget(launcher,
info.componentName, null);
float density = launcher.getResources().getDisplayMetrics().density;
int xPaddingDips = (int) ((padding.left + padding.right) / density);
int yPaddingDips = (int) ((padding.top + padding.bottom) / density);
options = new Bundle();
options.putInt(AppWidgetManager.OPTION_APPWIDGET_MIN_WIDTH,
rect.left - xPaddingDips);
options.putInt(AppWidgetManager.OPTION_APPWIDGET_MIN_HEIGHT,
rect.top - yPaddingDips);
options.putInt(AppWidgetManager.OPTION_APPWIDGET_MAX_WIDTH,
rect.right - xPaddingDips);
options.putInt(AppWidgetManager.OPTION_APPWIDGET_MAX_HEIGHT,
rect.bottom - yPaddingDips);
}
return options;
}
}
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