mini-cards/app/src/main/java/com/codigoparallevar/minicards/PartsHolder.java

package com.codigoparallevar.minicards;

import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.util.Log;

import com.codigoparallevar.minicards.parts.buttons.RoundButton;
import com.codigoparallevar.minicards.parts.logic.Ticker;
import com.codigoparallevar.minicards.parts.samples.ColorBox;
import com.codigoparallevar.minicards.types.Part;
import com.codigoparallevar.minicards.types.Tuple2;

import java.util.List;
import java.util.Vector;

class PartsHolder {
    private final Context context;

    private final static List<Tuple2<String, PartInstantiator>> BuiltInParts =
            new Vector<Tuple2<String, PartInstantiator>>(){{
                add(new Tuple2<String, PartInstantiator>("Round button", RoundButton.getInstantiator()));
                add(new Tuple2<String, PartInstantiator>("Ticker", Ticker.getInstantiator()));
                add(new Tuple2<String, PartInstantiator>("Red/Green box", ColorBox.getInstantiator()));
    }};

    public PartsHolder(Context context) {
        this.context = context;
    }

    public void openAddPartModal(final CanvasView canvasView) {
        AlertDialog.Builder builder = new AlertDialog.Builder(context);
        builder.setTitle("Choose part type")
                .setItems(getPartTypes(), new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        if ((which >= 0) && (which < BuiltInParts.size())){
                            Log.d("Minicards partsHolder",
                                    "Spawning " + BuiltInParts.get(which).item1);
                            PartInstantiator instantiator = BuiltInParts.get(which).item2;
                            PartsHolder.this.runInstantiator(instantiator, canvasView);
                        }
                    }
                });

        Dialog dialog = builder.create();
        dialog.show();
    }

    private void runInstantiator(PartInstantiator instantiator, CanvasView canvasView) {
        Part part = instantiator.build(canvasView);
        canvasView.addPart(part);
    }

    private static String[] getPartTypes() {
        String[] partTypes = new String[BuiltInParts.size()];
        for (int i = 0; i < BuiltInParts.size(); i++){
            partTypes[i] = BuiltInParts.get(i).item1;
        }

        return partTypes;
    }
}