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package com.mapswithme.maps.routing;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.support.annotation.ColorInt;
import android.support.annotation.Dimension;
import android.support.annotation.DrawableRes;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.annotation.RequiresApi;
import android.support.v4.graphics.drawable.DrawableCompat;
import android.text.TextPaint;
import android.text.TextUtils;
import android.util.AttributeSet;
import android.view.View;
import com.mapswithme.maps.R;
import com.mapswithme.maps.widget.recycler.MultilineLayoutManager;
import com.mapswithme.util.ThemeUtils;
/**
* Represents a specific transit step. It displays a transit info, such as a number, color, etc., for
* the specific transit type: pedestrian, rail, metro, etc.
*/
public class TransitStepView extends View implements MultilineLayoutManager.SqueezingInterface
{
@Nullable
private Drawable mDrawable;
@NonNull
private final RectF mBackgroundBounds = new RectF();
@NonNull
private final Rect mDrawableBounds = new Rect();
@NonNull
private final Rect mTextBounds = new Rect();
@NonNull
private final Paint mBackgroundPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
@NonNull
private final TextPaint mTextPaint = new TextPaint(Paint.ANTI_ALIAS_FLAG);
private int mBackgroundCornerRadius;
@Nullable
private String mText;
@SuppressWarnings("NullableProblems")
@NonNull
private TransitStepType mStepType;
public TransitStepView(Context context, @Nullable AttributeSet attrs)
{
super(context, attrs);
init(attrs);
}
public TransitStepView(Context context, @Nullable AttributeSet attrs, int defStyleAttr)
{
super(context, attrs, defStyleAttr);
init(attrs);
}
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public TransitStepView(Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes)
{
super(context, attrs, defStyleAttr, defStyleRes);
init(attrs);
}
private void init(@Nullable AttributeSet attrs)
{
mBackgroundCornerRadius = getResources().getDimensionPixelSize(R.dimen.routing_transit_step_corner_radius);
TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.TransitStepView);
float textSize = a.getDimensionPixelSize(R.styleable.TransitStepView_android_textSize, 0);
@ColorInt
int textColor = a.getColor(R.styleable.TransitStepView_android_textColor, Color.BLACK);
mTextPaint.setTextSize(textSize);
mTextPaint.setColor(textColor);
mDrawable = a.getDrawable(R.styleable.TransitStepView_android_drawable);
if (mDrawable != null)
mDrawable = DrawableCompat.wrap(mDrawable);
mStepType = TransitStepType.PEDESTRIAN;
a.recycle();
}
public void setTransitStepInfo(@NonNull TransitStepInfo info)
{
mStepType = info.getType();
mDrawable = getResources().getDrawable(mStepType == TransitStepType.INTERMEDIATE_POINT
? getIntermediatePointDrawableId(info.getIntermediateIndex())
: mStepType.getDrawable());
mDrawable = DrawableCompat.wrap(mDrawable);
mBackgroundPaint.setColor(getBackgroundColor(getContext(), info));
mText = info.getNumber();
invalidate();
requestLayout();
}
@ColorInt
private static int getBackgroundColor(@NonNull Context context, @NonNull TransitStepInfo info)
{
switch (info.getType())
{
case PEDESTRIAN:
return ThemeUtils.getColor(context, R.attr.transitPedestrianBackground);
case INTERMEDIATE_POINT:
return Color.TRANSPARENT;
default:
return info.getColor();
}
}
@DrawableRes
private static int getIntermediatePointDrawableId(int index)
{
switch (index)
{
case 0:
return R.drawable.ic_24px_route_point_a;
case 1:
return R.drawable.ic_24px_route_point_b;
case 2:
return R.drawable.ic_24px_route_point_c;
}
throw new AssertionError("Unknown intermediate point index: " + index);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int height = getDefaultSize(getSuggestedMinimumHeight(), MeasureSpec.UNSPECIFIED);
int width = getPaddingLeft();
if (mDrawable != null)
{
calculateDrawableBounds(height, mDrawable);
width += mDrawableBounds.width();
}
if (!TextUtils.isEmpty(mText))
{
mTextPaint.getTextBounds(mText, 0, mText.length(), mTextBounds);
width += (mDrawable != null ? getPaddingLeft() : 0) + mTextPaint.measureText(mText);
if (height == 0)
height = getPaddingTop() + mTextBounds.height() + getPaddingBottom();
}
width += getPaddingRight();
mBackgroundBounds.set(0, 0, width, height);
setMeasuredDimension(width, height);
}
@Override
public void squeezeTo(@Dimension int width)
{
int tSize = width - 2 * getPaddingLeft() - getPaddingRight() - mDrawableBounds.width();
mText = TextUtils.ellipsize(mText, mTextPaint, tSize, TextUtils.TruncateAt.END).toString();
}
@Override
public int getMinimumAcceptableSize()
{
return getResources().getDimensionPixelSize(R.dimen.routing_transit_setp_min_acceptable_with);
}
private void calculateDrawableBounds(int height, @NonNull Drawable drawable)
{
// If the clear view height, i.e. without top/bottom padding, is greater than the drawable height
// the drawable should be centered vertically by adding additional vertical top/bottom padding.
// If the drawable height is greater than the clear view height the drawable will be fitted
// (squeezed) into the parent container.
int clearHeight = height - getPaddingTop() - getPaddingBottom();
int vPad = 0;
if (clearHeight >= drawable.getIntrinsicHeight())
vPad = (clearHeight - drawable.getIntrinsicHeight()) / 2;
int acceptableDrawableHeight = clearHeight >= drawable.getIntrinsicHeight() ? drawable.getIntrinsicHeight()
: clearHeight;
// A transit icon must be squared-shaped. So, if the drawable width is greater than height the
// drawable will be squeezed horizontally to make it squared-shape.
int acceptableDrawableWidth = drawable.getIntrinsicWidth() > acceptableDrawableHeight
? acceptableDrawableHeight : drawable.getIntrinsicWidth();
mDrawableBounds.set(getPaddingLeft(), getPaddingTop() + vPad,
acceptableDrawableWidth + getPaddingLeft(),
getPaddingTop() + vPad + acceptableDrawableHeight);
}
@Override
protected void onDraw(Canvas canvas)
{
if (getBackground() == null && mDrawable != null)
{
canvas.drawRoundRect(mBackgroundBounds, mBackgroundCornerRadius, mBackgroundCornerRadius,
mBackgroundPaint);
}
if (mDrawable != null)
drawDrawable(getContext(), mStepType, mDrawable, canvas);
if (!TextUtils.isEmpty(mText))
{
int yPos = (int) ((canvas.getHeight() / 2) - ((mTextPaint.descent() + mTextPaint.ascent()) / 2)) ;
int xPos = mDrawable != null ? mDrawable.getBounds().right + getPaddingLeft()
: getPaddingLeft();
canvas.drawText(mText, xPos, yPos, mTextPaint);
}
}
private void drawDrawable(@NonNull Context context, @NonNull TransitStepType type,
@NonNull Drawable drawable, @NonNull Canvas canvas)
{
if (type == TransitStepType.PEDESTRIAN)
{
drawable.mutate();
DrawableCompat.setTint(drawable, ThemeUtils.getColor(context, R.attr.iconTint));
}
else if (type == TransitStepType.INTERMEDIATE_POINT)
{
drawable.mutate();
DrawableCompat.setTint(drawable, getResources().getColor(R.color.routing_intermediate_point));
}
drawable.setBounds(mDrawableBounds);
drawable.draw(canvas);
}
}
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