de.aw.monma.views.MonMaAutoCompleteTextView.java Source code

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Here is the source code for de.aw.monma.views.MonMaAutoCompleteTextView.java

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/*
 * MonMa: Eine freie Android-Application fuer die Verwaltung privater Finanzen
 *
 * Copyright [2015] [Alexander Winkler, 2373 Dahme/Germany]
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation; either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program; if
 * not, see <http://www.gnu.org/licenses/>.
 */

package de.aw.monma.views;

import android.content.Context;
import android.database.Cursor;
import android.databinding.BindingAdapter;
import android.support.annotation.NonNull;
import android.support.v4.widget.SimpleCursorAdapter;
import android.util.AttributeSet;
import android.view.View;
import android.widget.AdapterView;
import android.widget.FilterQueryProvider;

import de.aw.monma.R;
import de.aw.monma.database.DBDefinition;

import static de.aw.awlib.database.TableColumns._id;

public class MonMaAutoCompleteTextView extends android.support.v7.widget.AppCompatAutoCompleteTextView
        implements FilterQueryProvider, AdapterView.OnItemClickListener {
    protected String mLastValidText;
    protected long mLastSelectedID;
    private boolean initializedCalled;
    private DBDefinition tbd;
    private String[] mProjection;
    private String mSelection;
    private String mOrderBy;
    private OnTextChangedListener mOnTextChangeListener;

    public MonMaAutoCompleteTextView(Context context) {
        super(context);
        doInit();
    }

    public MonMaAutoCompleteTextView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
        doInit();
    }

    public MonMaAutoCompleteTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        doInit();
    }

    @BindingAdapter({ "onTextChanged" })
    public static void onTextChanged(MonMaAutoCompleteTextView view, OnTextChangedListener listener) {
        view.setOnTextChangedListener(listener);
    }

    @BindingAdapter({ "startID" })
    public static void setStartID(MonMaAutoCompleteTextView view, long startID) {
        view.setStartID(startID);
    }

    private void doInit() {
        if (!isInEditMode()) {
            setOnItemClickListener(this);
            setSelectAllOnFocus(true);
            setThreshold(0);
            setFocusable(true);
            setFocusableInTouchMode(true);
            setDropDownBackgroundResource(R.color.white);
            //            setDropDownHeight(getLineHeight() * 5);
        }
    }

    public long getSelectionID() {
        return mLastSelectedID;
    }

    /**
     * Initialisiert AutoCompleteTextView.
     *
     * @param tbd
     *         DBDefinition. Aus dieser Tabelle wird das Feld gelesen
     * @param selection
     *         selection
     * @param selectionArgs
     *         Argumente zur Selection
     * @param column
     *         Feld, welches fuer die Selection benutzt werden soll.
     * @param orderBy
     *
     * @throws NullPointerException,
     *         wenn LoaderManager null ist.
     */
    public final void initialize(DBDefinition tbd, String selection, String[] selectionArgs, @NonNull String column,
            String orderBy) {
        if (!isInEditMode()) {
            initializedCalled = true;
            this.tbd = tbd;
            mProjection = new String[] { column, _id };
            mSelection = column + " Like ? ";
            mOrderBy = orderBy;
            if (mOrderBy == null) {
                mOrderBy = "LENGTH(" + column + ")";
            }
            if (selection != null) {
                if (selectionArgs != null) {
                    for (String sel : selectionArgs) {
                        selection = selection.replaceFirst("\\?", "'" + sel + "'");
                    }
                }
                mSelection = mSelection + " AND (" + selection + ")";
            }
            mSelection = mSelection + "  GROUP BY " + column;
            mOrderBy = mOrderBy + ", " + column;
        }
    }

    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        if (!initializedCalled && !isInEditMode()) {
            throw new IllegalStateException(
                    "Method 'initialize(AWDBDefinition, String, " + "String[], int, String)' not called");
        }
        SimpleCursorAdapter mSimpleCursorAdapter = new SimpleCursorAdapter(getContext(),
                android.R.layout.simple_dropdown_item_1line, null, mProjection, new int[] { android.R.id.text1 },
                0) {
            @Override
            public CharSequence convertToString(Cursor cursor) {
                return cursor.getString(0);
            }
        };
        mSimpleCursorAdapter.setFilterQueryProvider(this);
        setAdapter(mSimpleCursorAdapter);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        Cursor c = (Cursor) parent.getItemAtPosition(position);
        c.moveToPosition(position);
        mLastValidText = c.getString(0);
        mLastSelectedID = c.getLong(1);
        if (mOnTextChangeListener != null) {
            mOnTextChangeListener.onTextChanged(this, mLastValidText, mLastSelectedID);
        }
    }

    @Override
    public Cursor runQuery(CharSequence constraint) {
        final String mConstraint = constraint == null ? "" : constraint.toString().trim();
        String[] mSelectionArgs = new String[] { "%" + mConstraint + "%" };
        Cursor c = getContext().getContentResolver().query(tbd.getUri(), mProjection, mSelection, mSelectionArgs,
                mOrderBy);
        if (c.moveToFirst()) {
            mLastSelectedID = c.getLong(1);
            mLastValidText = c.getString(0);
        } else {
            mLastSelectedID = NO_ID;
        }
        if (mOnTextChangeListener != null) {
            mOnTextChangeListener.onTextChanged(this, getText(), mLastSelectedID);
        }
        return c;
    }

    public void setOnTextChangedListener(OnTextChangedListener onTextChangedListener) {
        mOnTextChangeListener = onTextChangedListener;
    }

    private void setStartID(long id) {
        String sel = _id + " = ?";
        String[] selArg = new String[] { String.valueOf(id) };
        Cursor c = getContext().getContentResolver().query(tbd.getUri(), mProjection, sel, selArg, null);
        try {
            if (c.moveToFirst()) {
                setText(c.getString(0));
            }
        } finally {
            c.close();
        }
    }

    /**
     * Interface fuer Listener auf Textaenderungen
     */
    public interface OnTextChangedListener {
        /**
         * Wird gerufen, wenn sich der Text einer View geaendert hat
         *
         * @param view
         *         view, deren Text sich geaendert hat
         * @param currentText
         *         Neuer Text.
         * @param currentTextID
         */
        void onTextChanged(View view, CharSequence currentText, long currentTextID);
    }
}