Java tutorial
/* * Geopaparazzi - Digital field mapping on Android based devices * Copyright (C) 2016 HydroloGIS (www.hydrologis.com) * * 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 eu.geopaparazzi.library.core.dialogs; import android.app.Activity; import android.app.AlertDialog; import android.app.Dialog; import android.content.DialogInterface; import android.graphics.Color; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.text.Editable; import android.text.TextWatcher; import android.view.View; import android.widget.CompoundButton; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.Switch; import java.util.ArrayList; import java.util.List; import eu.geopaparazzi.library.R; import eu.geopaparazzi.library.style.Style; /** * Class to set the dashing of a stroke. * * @author Andrea Antonello */ public class StrokeDashDialogFragment extends DialogFragment implements CompoundButton.OnCheckedChangeListener { private EditText unitText; private EditText finalDashText; private EditText finalShiftText; private float[] mInitialDash; /** * A simple interface to use to notify color and stroke changes. */ public interface IDashStrokePropertiesChangeListener { /** * Called when there is the need to notify that a change occurred. */ void onDashChanged(float[] dash, float shift); } private final static String PREFS_KEY_STROKEDASH = "PREFS_KEY_STROKEDASH"; private final static String PREFS_KEY_STROKEDASHSHIFT = "PREFS_KEY_STROKEDASHSHIFT"; private float[] mCurrentDash; private float mDashShift = 0; private IDashStrokePropertiesChangeListener iDashStrokePropertiesChangeListener; private Switch[] dashSwitches = new Switch[6]; private LinearLayout[] dashImages = new LinearLayout[6]; /** * Create a dialog instance. * * @param dash the current dash to show. * @return the instance. */ public static StrokeDashDialogFragment newInstance(float[] dash, float shift) { StrokeDashDialogFragment f = new StrokeDashDialogFragment(); if (dash != null) { Bundle args = new Bundle(); args.putFloatArray(PREFS_KEY_STROKEDASH, dash); args.putFloat(PREFS_KEY_STROKEDASHSHIFT, shift); f.setArguments(args); } return f; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Bundle arguments = getArguments(); if (arguments != null) { mInitialDash = arguments.getFloatArray(PREFS_KEY_STROKEDASH); if (mInitialDash != null) { mCurrentDash = mInitialDash; } mDashShift = arguments.getFloat(PREFS_KEY_STROKEDASHSHIFT); } } // create an AlertDialog and return it @Override public Dialog onCreateDialog(Bundle bundle) { // create the dialog AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); View dashStrokeDialogView = getActivity().getLayoutInflater().inflate(R.layout.fragment_dialog_stroke_dash, null); builder.setView(dashStrokeDialogView); // add GUI to dialog Switch switch1 = (Switch) dashStrokeDialogView.findViewById(R.id.switch1); Switch switch2 = (Switch) dashStrokeDialogView.findViewById(R.id.switch2); Switch switch3 = (Switch) dashStrokeDialogView.findViewById(R.id.switch3); Switch switch4 = (Switch) dashStrokeDialogView.findViewById(R.id.switch4); Switch switch5 = (Switch) dashStrokeDialogView.findViewById(R.id.switch5); Switch switch6 = (Switch) dashStrokeDialogView.findViewById(R.id.switch6); dashSwitches = new Switch[] { switch1, switch2, switch3, switch4, switch5, switch6 }; for (Switch dashSwitch : dashSwitches) { dashSwitch.setOnCheckedChangeListener(this); } LinearLayout image1 = (LinearLayout) dashStrokeDialogView.findViewById(R.id.imageView1); LinearLayout image2 = (LinearLayout) dashStrokeDialogView.findViewById(R.id.imageView2); LinearLayout image3 = (LinearLayout) dashStrokeDialogView.findViewById(R.id.imageView3); LinearLayout image4 = (LinearLayout) dashStrokeDialogView.findViewById(R.id.imageView4); LinearLayout image5 = (LinearLayout) dashStrokeDialogView.findViewById(R.id.imageView5); LinearLayout image6 = (LinearLayout) dashStrokeDialogView.findViewById(R.id.imageView6); dashImages = new LinearLayout[] { image1, image2, image3, image4, image5, image6 }; unitText = (EditText) dashStrokeDialogView.findViewById(R.id.unitText); finalDashText = (EditText) dashStrokeDialogView.findViewById(R.id.finalDashText); finalShiftText = (EditText) dashStrokeDialogView.findViewById(R.id.finalDashShiftText); if (mCurrentDash != null) { String dashStr = Style.dashToString(mCurrentDash, null); finalDashText.setText(dashStr); finalShiftText.setText(mDashShift + ""); } builder.setPositiveButton(R.string.set_dash, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { if (iDashStrokePropertiesChangeListener != null) { iDashStrokePropertiesChangeListener.onDashChanged(mCurrentDash, mDashShift); } } }); builder.setNegativeButton(getString(android.R.string.cancel), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { } }); return builder.create(); // return dialog } private void paintDash(int unit) { // first check if one is checked boolean firstChecked = dashSwitches[0].isChecked(); if (firstChecked) { mDashShift = 0; } else { mDashShift = unit; } boolean oneChecked = false; for (Switch dashSwitch : dashSwitches) { if (dashSwitch.isChecked()) { oneChecked = true; break; } } List<Float> dashList = new ArrayList<>(dashSwitches.length); float count = 1; int length = dashSwitches.length - 1; for (int i = 0; i < length; i++) { if (dashSwitches[i].isChecked() && dashSwitches[i + 1].isChecked()) { count++; } else if (!dashSwitches[i].isChecked() && !dashSwitches[i + 1].isChecked()) { count++; } else { dashList.add(count * unit); count = 1; } } dashList.add(count * unit); mCurrentDash = new float[dashList.size()]; for (int i = 0; i < dashList.size(); i++) { mCurrentDash[i] = dashList.get(i); } for (int i = 0; i < dashSwitches.length; i++) { if (dashSwitches[i].isChecked()) { dashImages[i].setBackgroundColor(Color.BLACK); } else { dashImages[i].setBackgroundColor(Color.WHITE); } } if (mCurrentDash == null) mCurrentDash = mInitialDash; String dashStr = Style.dashToString(mCurrentDash, null); finalDashText.setText(dashStr); finalShiftText.setText("" + mDashShift); } @Override public void onAttach(Activity activity) { super.onAttach(activity); if (activity instanceof IDashStrokePropertiesChangeListener) { iDashStrokePropertiesChangeListener = (IDashStrokePropertiesChangeListener) activity; } } @Override public void onDetach() { super.onDetach(); iDashStrokePropertiesChangeListener = null; } @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { String unitString = unitText.getText().toString(); int unit = 5; try { unit = Integer.parseInt(unitString); } catch (NumberFormatException e) { unitText.setText(unit + ""); } paintDash(unit); } }