ViewLayoutUtils.java revision 37beaf1529a61228d6240736937789e5622b29ed 
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
17package com.android.inputmethod.latin.utils;
18
19import android.view.View;
20import android.view.ViewGroup;
21import android.view.ViewGroup.MarginLayoutParams;
22import android.view.Window;
23import android.view.WindowManager;
24import android.widget.FrameLayout;
25import android.widget.LinearLayout;
26import android.widget.RelativeLayout;
27
28public 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.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.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