scale View And Children - Android User Interface

Android examples for User Interface:View Child

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Description

scale View And Children

Demo Code

/*//  w  w w. j  a  va  2 s . c om
 * The MIT License (MIT)
 * 
 * Copyright ? 2013 Clover Studio Ltd. All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
//package com.java2s;

import android.view.View;
import android.view.ViewGroup;

import android.widget.TextView;

public class Main {
    public static void scaleViewAndChildren(View root, float scale) {
        // Retrieve the view's layout information
        ViewGroup.LayoutParams layoutParams = root.getLayoutParams();

        // Scale the view itself
        if (layoutParams.width > 0) {
            layoutParams.width *= scale;
        }
        if (layoutParams.height > 0) {
            layoutParams.height *= scale;
        }

        // If this view has margins, scale those too
        if (layoutParams instanceof ViewGroup.MarginLayoutParams) {
            ViewGroup.MarginLayoutParams marginParams = (ViewGroup.MarginLayoutParams) layoutParams;
            marginParams.leftMargin *= scale;
            marginParams.rightMargin *= scale;
            marginParams.topMargin *= scale;
            marginParams.bottomMargin *= scale;
        }
        // Set the layout information back into the view
        root.setLayoutParams(layoutParams);

        // Scale the view's padding
        root.setPadding((int) (root.getPaddingLeft() * scale),
                (int) (root.getPaddingTop() * scale),
                (int) (root.getPaddingRight() * scale),
                (int) (root.getPaddingBottom() * scale));

        // If the root view is a TextView, scale the size of its text
        if (root instanceof TextView) {
            TextView textView = (TextView) root;
            textView.setTextSize(textView.getTextSize() * scale);
        }

        // If the root view is a ViewGroup, scale all of its children
        // recursively
        if (root instanceof ViewGroup) {
            ViewGroup groupView = (ViewGroup) root;
            for (int cnt = 0; cnt < groupView.getChildCount(); ++cnt)
                scaleViewAndChildren(groupView.getChildAt(cnt), scale);
        }
    }
}

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