com.github.shareme.gwsmaterialuikit.library.mscrollbar.Indicator.java Source code

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Here is the source code for com.github.shareme.gwsmaterialuikit.library.mscrollbar.Indicator.java

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/*
 *  Copyright  2016, Turing Technologies, an unincorporated organisation of Wynne Plaga
 *  Modifications Copyright(C) 2016 Fred Grott(GrottWorkShop)
 *
 *  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.github.shareme.gwsmaterialuikit.library.mscrollbar;

import android.content.Context;
import android.graphics.drawable.GradientDrawable;
import android.os.Build;
import android.support.v4.content.ContextCompat;
import android.support.v4.view.ViewCompat;
import android.support.v7.widget.RecyclerView;
import android.util.TypedValue;
import android.view.ViewGroup;
import android.widget.RelativeLayout;
import android.widget.TextView;

import com.github.shareme.gwsmaterialuikit.library.R;

abstract class Indicator extends RelativeLayout {

    protected TextView textView;
    protected Context context;
    private boolean addSpace;
    private MaterialScrollBar materialScrollBar;

    public Indicator(Context context) {
        super(context);
        this.context = context;
        textView = new TextView(context);
        setVisibility(INVISIBLE);
    }

    public void setSizeCustom(int size) {
        LayoutParams lp = (LayoutParams) getLayoutParams();
        if (addSpace) {
            lp.setMargins(0, 0, size + Utils.getDP(10, this), 0);
        } else {
            lp.setMargins(0, 0, size, 0);
        }
        setLayoutParams(lp);
    }

    void linkToScrollBar(MaterialScrollBar msb, boolean addSpace) {
        this.addSpace = addSpace;
        if (Build.VERSION.SDK_INT >= 16) {
            setBackground(ContextCompat.getDrawable(context, R.drawable.mscrollbar_indicator));
        } else {
            setBackgroundDrawable(ContextCompat.getDrawable(context, R.drawable.mscrollbar_indicator));
        }
        LayoutParams lp = new LayoutParams(Utils.getDP(getIndicatorWidth(), this),
                Utils.getDP(getIndicatorHeight(), this));
        if (addSpace) {
            lp.setMargins(0, 0, Utils.getDP(15, this) + msb.handle.getWidth(), 0);
        } else {
            lp.setMargins(0, 0, Utils.getDP(2, this) + msb.handle.getWidth(), 0);
        }

        textView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, getTextSize());
        LayoutParams tvlp = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        tvlp.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);

        addView(textView, tvlp);

        ((GradientDrawable) getBackground()).setColor(msb.handleColour);

        lp.addRule(ALIGN_RIGHT, msb.getId());
        ((ViewGroup) msb.getParent()).addView(this, lp);

        materialScrollBar = msb;
    }

    /**
     * Used by the materialScrollBar to move the indicator with the handle
     * @param y Position to which the indicator should move.
     */
    void setScroll(float y) {
        if (getVisibility() == VISIBLE) {
            y -= 75 - materialScrollBar.getIndicatorOffset() + Utils.getDP(getIndicatorHeight() / 2, this);

            if (y < 5) {
                y = 5;
            }

            ViewCompat.setY(this, y);
        }
    }

    /**
     * Sets the content text for the indicator and resizes if needed
     */
    void setText(int section) {
        String newText = getTextElement(section, materialScrollBar.recyclerView.getAdapter());
        if (!textView.getText().equals(newText)) {
            textView.setText(newText);

            LayoutWrapContentUpdater.wrapContentAgain(this);
        }
    }

    /**
     * Used by the materialScrollBar to change the text colour for the indicator.
     * @param colour The desired text colour.
     */
    void setTextColour(int colour) {
        textView.setTextColor(colour);
    }

    abstract String getTextElement(Integer currentSection, RecyclerView.Adapter adapter);

    abstract int getIndicatorHeight();

    abstract int getIndicatorWidth();

    abstract void testAdapter(RecyclerView.Adapter adapter);

    abstract int getTextSize();

}