com.hippo.conductor.dialog.DialogContentView.java Source code

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Here is the source code for com.hippo.conductor.dialog.DialogContentView.java

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/*
 * Copyright 2017 Hippo Seven
 *
 * 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.hippo.conductor.dialog;

/*
 * Created by Hippo on 4/1/2017.
 */

import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.support.annotation.AttrRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.view.ViewCompat;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.util.TypedValue;
import android.widget.FrameLayout;

// The actual content of dialog, direct child of DialogRoot.
class DialogContentView extends FrameLayout {

    private final TypedValue minWidthMajor = new TypedValue();
    private final TypedValue minWidthMinor = new TypedValue();

    public DialogContentView(@NonNull Context context) {
        super(context);
        init(context);
    }

    public DialogContentView(@NonNull Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    public DialogContentView(@NonNull Context context, @Nullable AttributeSet attrs, @AttrRes int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        init(context);
    }

    private void init(Context context) {
        Resources.Theme theme = context.getTheme();
        theme.resolveAttribute(android.R.attr.windowMinWidthMajor, minWidthMajor, true);
        theme.resolveAttribute(android.R.attr.windowMinWidthMinor, minWidthMinor, true);

        Drawable drawable = ResourcesUtils.getAttrDrawable(context, android.R.attr.windowBackground);
        ViewCompat.setBackground(this, drawable);

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            float elevation = ResourcesUtils.getAttrDimension(context, android.R.attr.windowElevation);
            ViewCompat.setElevation(this, elevation);
        }
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);

        final int widthMode = MeasureSpec.getMode(widthMeasureSpec);
        final boolean isPortrait = getResources()
                .getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT;
        final TypedValue tv = isPortrait ? minWidthMinor : minWidthMajor;
        boolean measure = false;

        if (widthMode == MeasureSpec.AT_MOST && tv.type != TypedValue.TYPE_NULL) {
            final int min;
            final DisplayMetrics metrics = getContext().getResources().getDisplayMetrics();
            if (tv.type == TypedValue.TYPE_DIMENSION) {
                min = (int) tv.getDimension(metrics);
            } else if (tv.type == TypedValue.TYPE_FRACTION) {
                min = (int) tv.getFraction(metrics.widthPixels, metrics.widthPixels);
            } else {
                min = 0;
            }

            if (getMeasuredWidth() < min) {
                widthMeasureSpec = MeasureSpec.makeMeasureSpec(min, MeasureSpec.EXACTLY);
                measure = true;
            }
        }

        if (measure) {
            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
        }
    }
}