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package com.mapswithme.maps.widget;
import android.annotation.TargetApi;
import android.content.Context;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.os.Build;
import android.support.annotation.DrawableRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.annotation.StringRes;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.mapswithme.maps.R;
import com.mapswithme.util.UiUtils;
public class PlaceholderView extends LinearLayout
{
@SuppressWarnings("NullableProblems")
@NonNull
private ImageView mImage;
@SuppressWarnings("NullableProblems")
@NonNull
private TextView mTitle;
@SuppressWarnings("NullableProblems")
@NonNull
private TextView mSubtitle;
private int mImgMaxHeight;
private int mImgMinHeight;
@DrawableRes
private int mImgSrcDefault;
@StringRes
private int mTitleResIdDefault;
@StringRes
private int mSubtitleResIdDefault;
public PlaceholderView(Context context)
{
this(context, null, 0);
}
public PlaceholderView(Context context, @Nullable AttributeSet attrs)
{
this(context, attrs, 0);
}
public PlaceholderView(Context context, @Nullable AttributeSet attrs, int defStyleAttr)
{
super(context, attrs, defStyleAttr);
init(context, attrs);
}
@TargetApi(Build.VERSION_CODES.LOLLIPOP)
public PlaceholderView(Context context, @Nullable AttributeSet attrs, int defStyleAttr,
int defStyleRes)
{
super(context, attrs, defStyleAttr, defStyleRes);
init(context, attrs);
}
private void init(Context context, AttributeSet attrs)
{
Resources res = getResources();
mImgMaxHeight = res.getDimensionPixelSize(R.dimen.placeholder_size);
mImgMinHeight = res.getDimensionPixelSize(R.dimen.placeholder_size_small);
LayoutInflater inflater = LayoutInflater.from(context);
inflater.inflate(R.layout.placeholder_image, this, true);
inflater.inflate(R.layout.placeholder_title, this, true);
inflater.inflate(R.layout.placeholder_subtitle, this, true);
setOrientation(VERTICAL);
initDefaultValues(context, attrs);
}
private void initDefaultValues(Context context, AttributeSet attrs)
{
TypedArray attrsArray = null;
try
{
attrsArray =
context.getTheme().obtainStyledAttributes(attrs, R.styleable.PlaceholderView, 0, 0);
mImgSrcDefault = attrsArray.getResourceId(
R.styleable.PlaceholderView_imgSrcDefault,
UiUtils.NO_ID);
mTitleResIdDefault = attrsArray.getResourceId(
R.styleable.PlaceholderView_titleDefault,
UiUtils.NO_ID);
mSubtitleResIdDefault = attrsArray.getResourceId(
R.styleable.PlaceholderView_subTitleDefault,
UiUtils.NO_ID);
}
finally
{
if (attrsArray != null)
attrsArray.recycle();
}
}
@Override
protected void onFinishInflate()
{
super.onFinishInflate();
mImage = findViewById(R.id.image);
mTitle = findViewById(R.id.title);
mSubtitle = findViewById(R.id.subtitle);
setupDefaultContent();
}
private void setupDefaultContent()
{
if (isDefaultValueValid(mImgSrcDefault))
{
mImage.setImageResource(mImgSrcDefault);
}
if (isDefaultValueValid(mTitleResIdDefault))
{
mTitle.setText(mTitleResIdDefault);
}
if (isDefaultValueValid(mSubtitleResIdDefault))
{
mSubtitle.setText(mSubtitleResIdDefault);
}
}
private static boolean isDefaultValueValid(int defaultResId)
{
return defaultResId != UiUtils.NO_ID;
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int childrenTextTotalHeight = calcTotalTextChildrenHeight(widthMeasureSpec, heightMeasureSpec);
final int defHeight = getDefaultSize(getSuggestedMinimumHeight(), heightMeasureSpec);
MarginLayoutParams imgParams = (MarginLayoutParams) mImage.getLayoutParams();
int potentialHeight =
defHeight - getPaddingBottom() - getPaddingTop() - childrenTextTotalHeight -
imgParams.bottomMargin - imgParams.topMargin;
int imgSpaceRaw = Math.min(potentialHeight, mImgMaxHeight);
imgParams.height = imgSpaceRaw;
imgParams.width = imgSpaceRaw;
measureChildWithMargins(mImage, widthMeasureSpec, 0, heightMeasureSpec, 0);
boolean isImageSpaceAllowed = imgSpaceRaw > mImgMinHeight;
int childrenTotalHeight = childrenTextTotalHeight;
if (isImageSpaceAllowed)
childrenTotalHeight += calcHeightWithMargins(mImage);
UiUtils.showIf(isImageSpaceAllowed, mImage);
final int height = childrenTotalHeight + getPaddingTop() + getPaddingBottom();
final int width = getDefaultSize(getSuggestedMinimumWidth(), widthMeasureSpec);
setMeasuredDimension(width, height);
}
private int calcTotalTextChildrenHeight(int widthMeasureSpec, int heightMeasureSpec)
{
int totalHeight = 0;
for (int index = 0; index < getChildCount(); index++)
{
View child = getChildAt(index);
if (child.getVisibility() == VISIBLE && child != mImage)
{
measureChildWithMargins(child, widthMeasureSpec , 0, heightMeasureSpec, 0);
totalHeight += calcHeightWithMargins(child);
}
}
return totalHeight;
}
private static int calcHeightWithMargins(@NonNull View view) {
MarginLayoutParams params = (MarginLayoutParams) view.getLayoutParams();
return view.getMeasuredHeight() + params.bottomMargin + params.topMargin;
}
public void setContent(@DrawableRes int imageRes, @StringRes int titleRes,
@StringRes int subtitleRes)
{
mImage.setImageResource(imageRes);
mTitle.setText(titleRes);
mSubtitle.setText(subtitleRes);
}
}
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