Java tutorial
/** * Paintroid: An image manipulation application for Android. * Copyright (C) 2010-2015 The Catrobat Team * (<http://developer.catrobat.org/credits>) * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package color.kidpaint.com.kidpaintcolor.dialog; import android.annotation.SuppressLint; import android.annotation.TargetApi; import android.app.AlertDialog; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.graphics.Paint; import android.graphics.Paint.Cap; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.widget.ImageButton; import android.widget.RadioButton; import android.widget.SeekBar; import android.widget.TextView; import java.util.ArrayList; import color.kidpaint.com.kidpaintcolor.R; @SuppressLint("ValidFragment") public final class BrushPickerDialog extends DialogFragment implements OnClickListener, DialogInterface.OnClickListener { private static final String NOT_INITIALIZED_ERROR_MESSAGE = "BrushPickerDialog has not been initialized. Call init() first!"; private static BrushPickerDialog instance; private ArrayList<OnBrushChangedListener> mBrushChangedListener; private Paint mCurrentPaint; private Context mContext; private TextView mBrushSizeText; private SeekBar mBrushWidthSeekBar; private RadioButton mRbtnCircle; private RadioButton mRbtnRect; private static final int MIN_BRUSH_SIZE = 1; public interface OnBrushChangedListener { public void setCap(Cap cap); public void setStroke(int stroke); } public class OnBrushChangedWidthSeekBarListener implements SeekBar.OnSeekBarChangeListener { @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { if (progress < MIN_BRUSH_SIZE) { progress = MIN_BRUSH_SIZE; seekBar.setProgress(progress); } updateStrokeChange(progress); mBrushSizeText.setText("" + progress); } @Override public void onStartTrackingTouch(SeekBar seekBar) { } @Override public void onStopTrackingTouch(SeekBar seekBar) { } } @SuppressLint("ValidFragment") private BrushPickerDialog(Context context) { mBrushChangedListener = new ArrayList<OnBrushChangedListener>(); mContext = context; } public static BrushPickerDialog getInstance() { if (instance == null) { throw new IllegalStateException(NOT_INITIALIZED_ERROR_MESSAGE); } return instance; } public static void init(Context context) { instance = new BrushPickerDialog(context); } public void setCurrentPaint(Paint currentPaint) { mCurrentPaint = currentPaint; updateStrokeCap(currentPaint.getStrokeCap()); updateStrokeChange((int) currentPaint.getStrokeWidth()); } public void addBrushChangedListener(OnBrushChangedListener listener) { mBrushChangedListener.add(listener); } public void removeBrushChangedListener(OnBrushChangedListener listener) { mBrushChangedListener.remove(listener); } private void updateStrokeChange(int strokeWidth) { for (OnBrushChangedListener listener : mBrushChangedListener) { if (listener == null) { mBrushChangedListener.remove(listener); } listener.setStroke(strokeWidth); } } private void updateStrokeCap(Cap cap) { for (OnBrushChangedListener listener : mBrushChangedListener) { if (listener == null) { mBrushChangedListener.remove(listener); } listener.setCap(cap); } } @TargetApi(11) @Override public Dialog onCreateDialog(Bundle savedInstanceState) { LayoutInflater inflator = getActivity().getLayoutInflater(); AlertDialog.Builder builder = new CustomAlertDialogBuilder(mContext); // if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB) { // builder = new AlertDialog.Builder(mContext); // // } else { // builder = new AlertDialog.Builder(mContext, // AlertDialog.THEME_HOLO_DARK); // } builder.setTitle(R.string.stroke_title); View view = inflator.inflate(R.layout.dialog_stroke, null); ImageButton btn_circle = (ImageButton) view.findViewById(R.id.stroke_ibtn_circle); btn_circle.setOnClickListener(this); ImageButton btn_rect = (ImageButton) view.findViewById(R.id.stroke_ibtn_rect); btn_rect.setOnClickListener(this); mRbtnCircle = (RadioButton) view.findViewById(R.id.stroke_rbtn_circle); mRbtnCircle.setOnClickListener(this); mRbtnRect = (RadioButton) view.findViewById(R.id.stroke_rbtn_rect); mRbtnRect.setOnClickListener(this); mBrushWidthSeekBar = (SeekBar) view.findViewById(R.id.stroke_width_seek_bar); mBrushWidthSeekBar.setOnSeekBarChangeListener(new OnBrushChangedWidthSeekBarListener()); mBrushSizeText = (TextView) view.findViewById(R.id.stroke_width_width_text); builder.setView(view); builder.setNeutralButton(R.string.done, this); return builder.create(); } @Override public void onClick(View v) { switch (v.getId()) { case R.id.stroke_ibtn_circle: updateStrokeCap(Cap.ROUND); mRbtnCircle.setChecked(true); break; case R.id.stroke_ibtn_rect: updateStrokeCap(Cap.SQUARE); mRbtnRect.setChecked(true); break; case R.id.stroke_rbtn_circle: updateStrokeCap(Cap.ROUND); break; case R.id.stroke_rbtn_rect: updateStrokeCap(Cap.SQUARE); break; default: break; } } @Override public void onStart() { super.onStart(); if (mCurrentPaint.getStrokeCap() == Cap.ROUND) { mRbtnCircle.setChecked(true); } else { mRbtnRect.setChecked(true); } mBrushWidthSeekBar.setProgress((int) mCurrentPaint.getStrokeWidth()); } @Override public void onClick(DialogInterface dialog, int which) { switch (which) { case AlertDialog.BUTTON_NEUTRAL: dismiss(); break; } } }