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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.inputmethod.latin.utils;
     18 
     19 import android.view.View;
     20 import android.view.ViewGroup;
     21 import android.view.ViewGroup.MarginLayoutParams;
     22 import android.view.Window;
     23 import android.view.WindowManager;
     24 import android.widget.FrameLayout;
     25 import android.widget.LinearLayout;
     26 import android.widget.RelativeLayout;
     27 
     28 public final class ViewLayoutUtils {
     29     private ViewLayoutUtils() {
     30         // This utility class is not publicly instantiable.
     31     }
     32 
     33     public static MarginLayoutParams newLayoutParam(final ViewGroup placer, final int width,
     34             final int height) {
     35         if (placer instanceof FrameLayout) {
     36             return new FrameLayout.LayoutParams(width, height);
     37         } else if (placer instanceof RelativeLayout) {
     38             return new RelativeLayout.LayoutParams(width, height);
     39         } else if (placer == null) {
     40             throw new NullPointerException("placer is null");
     41         } else {
     42             throw new IllegalArgumentException("placer is neither FrameLayout nor RelativeLayout: "
     43                     + placer.getClass().getName());
     44         }
     45     }
     46 
     47     public static void placeViewAt(final View view, final int x, final int y, final int w,
     48             final int h) {
     49         final ViewGroup.LayoutParams lp = view.getLayoutParams();
     50         if (lp instanceof MarginLayoutParams) {
     51             final MarginLayoutParams marginLayoutParams = (MarginLayoutParams)lp;
     52             marginLayoutParams.width = w;
     53             marginLayoutParams.height = h;
     54             marginLayoutParams.setMargins(x, y, 0, 0);
     55         }
     56     }
     57 
     58     public static void updateLayoutHeightOf(final Window window, final int layoutHeight) {
     59         final WindowManager.LayoutParams params = window.getAttributes();
     60         if (params != null && params.height != layoutHeight) {
     61             params.height = layoutHeight;
     62             window.setAttributes(params);
     63         }
     64     }
     65 
     66     public static void updateLayoutHeightOf(final View view, final int layoutHeight) {
     67         final ViewGroup.LayoutParams params = view.getLayoutParams();
     68         if (params != null && params.height != layoutHeight) {
     69             params.height = layoutHeight;
     70             view.setLayoutParams(params);
     71         }
     72     }
     73 
     74     public static void updateLayoutGravityOf(final View view, final int layoutGravity) {
     75         final ViewGroup.LayoutParams lp = view.getLayoutParams();
     76         if (lp instanceof LinearLayout.LayoutParams) {
     77             final LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)lp;
     78             if (params.gravity != layoutGravity) {
     79                 params.gravity = layoutGravity;
     80                 view.setLayoutParams(params);
     81             }
     82         } else if (lp instanceof FrameLayout.LayoutParams) {
     83             final FrameLayout.LayoutParams params = (FrameLayout.LayoutParams)lp;
     84             if (params.gravity != layoutGravity) {
     85                 params.gravity = layoutGravity;
     86                 view.setLayoutParams(params);
     87             }
     88         } else {
     89             throw new IllegalArgumentException("Layout parameter doesn't have gravity: "
     90                     + lp.getClass().getName());
     91         }
     92     }
     93 }
     94