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ViewController.swift
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//
// ViewController.swift
// Drawing Pad
//
// Created by XCodeClub on 2016-11-14.
// Copyright © 2016 org.cuappdev.drawingpad. All rights reserved.
//
import UIKit
class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate, UIPickerViewDelegate, UIPickerViewDataSource, changeColorProtocol, imageChangedProtocol {
var imageView: DrawingView!
var color = UIColor.init(red: 0, green: 0, blue: 0, alpha: 1);
var thickness = 10
let drawStyleData = ["Freehand","Line","Square","Circle"];
var drawStyleButton: UIButton!
var drawStylePicker: UIPickerView!
var drawStylePickerMask: UIButton!
var thicknessBar: UISlider!
var thicknessValueLabel: UILabel!
var thicknessLabel: UILabel!
var colorButton: UIButton!
var colorLabel: UILabel!
var undoButton: UIBarButtonItem!
var redoButton: UIBarButtonItem!
var clearButton: UIBarButtonItem!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let backgroundView = UIImageView(frame: view.frame);
backgroundView.image = #imageLiteral(resourceName: "background");
view.addSubview(backgroundView);
let backPanelView = UIView(frame: CGRect(x: 0, y: view.frame.height-100, width: view.frame.width, height: 90));
backPanelView.backgroundColor = UIColor.init(red: 1, green: 1, blue: 204/255, alpha: 0.5);
view.addSubview(backPanelView);
imageView = DrawingView(frame: CGRect(x: 20, y: 75, width: view.frame.width-40, height: view.frame.height-190), color: color, thickness: thickness, style: drawStyleData[0]);
imageView.backgroundColor = .white;
imageView.layer.cornerRadius = 10;
imageView.clipsToBounds = true;
imageView.delegate = self;
view.addSubview(imageView);
titleBarSetUp();
controlPanelSetUp();
}
func titleBarSetUp() {
let navigationBar = UINavigationBar(frame: CGRect(x: 0, y: 0, width: view.frame.width, height: 60));
let navigationItem = UINavigationItem();
navigationBar.items = [navigationItem];
view.addSubview(navigationBar);
let spaceButton = UIBarButtonItem(title: "", style: .plain, target: self, action: nil);
undoButton = UIBarButtonItem(image: #imageLiteral(resourceName: "undo"), style: .plain, target: self, action: #selector(undoButtonPressed));
undoButton.isEnabled = false;
redoButton = UIBarButtonItem(image: #imageLiteral(resourceName: "redo"), style: .plain, target: self, action: #selector(redoButtonPressed));
redoButton.isEnabled = false;
clearButton = UIBarButtonItem(title: " Clear", style: .plain, target: self, action: #selector(clearButtonPressed));
navigationItem.leftBarButtonItems = [undoButton, redoButton, clearButton];
let saveButton = UIBarButtonItem(barButtonSystemItem: .save, target: self, action: #selector(saveButtonPressed));
let importButton = UIBarButtonItem(title: "Import", style: .plain, target: self, action: #selector(importButtonPressed));
navigationItem.rightBarButtonItems = [saveButton, spaceButton, importButton];
}
func undoButtonPressed() {
redoButton.isEnabled = true;
undoButton.isEnabled = imageView.undo();
}
func redoButtonPressed() {
undoButton.isEnabled = true;
redoButton.isEnabled = imageView.redo();
}
func clearButtonPressed() {
let clearConfirmWindow = UIAlertController(title: "Confirm Selection", message: "The current drawing will be discarded (cannot be undone).", preferredStyle: .alert);
clearConfirmWindow.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil));
clearConfirmWindow.addAction(UIAlertAction(title: "Clear", style: .destructive, handler: { (UIAlertAction) in
self.imageView.clear();
self.redoButton.isEnabled = false;
self.undoButton.isEnabled = false;
}))
present(clearConfirmWindow, animated: true, completion: nil);
}
func importButtonPressed() {
let imagePicker = UIImagePickerController()
imagePicker.delegate = self
if UIImagePickerController.isSourceTypeAvailable(.camera) {
imagePicker.sourceType = .camera
} else {
imagePicker.sourceType = .photoLibrary
}
present(imagePicker, animated: true, completion: nil)
}
func saveButtonPressed() {
if let image = imageView.getImage() {
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
}
let saveCompleteWindow = UIAlertController(title: "Image Saved", message: "Drawing has been saved to photo library on local device.", preferredStyle: .alert);
saveCompleteWindow.addAction(UIAlertAction(title: "Done", style: .default, handler: nil));
present(saveCompleteWindow, animated: true, completion: nil);
}
func controlPanelSetUp() {
thicknessBar = UISlider(frame: CGRect(x: 200, y: view.frame.height-100, width: view.frame.width-250, height: 50));
thicknessBar.maximumValue = 100;
thicknessBar.minimumValue = 2;
thicknessBar.addTarget(self, action: #selector(thicknessBarChanged), for: .valueChanged);
thicknessBar.setValue(Float(thickness), animated: false);
view.addSubview(thicknessBar);
thicknessValueLabel = UILabel(frame: CGRect(x: view.frame.width-40, y: view.frame.height-100, width: 150, height: 50));
thicknessValueLabel.text = String(Int(thicknessBar.value));
view.addSubview(thicknessValueLabel);
thicknessLabel = UILabel(frame: CGRect(x: 140, y: view.frame.height-100, width: 50, height: 50));
thicknessLabel.text = "Width";
view.addSubview(thicknessLabel);
let clearButtonBackground = UIImageView(frame: CGRect(x: 80, y: view.frame.height-50, width: view.frame.width-100, height: 30));
clearButtonBackground.image = #imageLiteral(resourceName: "transparency");
clearButtonBackground.contentMode = .topLeft;
clearButtonBackground.clipsToBounds = true;
view.addSubview(clearButtonBackground);
colorButton = UIButton(frame: clearButtonBackground.frame);
colorButton.backgroundColor = color;
colorButton.addTarget(self, action: #selector(colorButtonPressed), for: .touchUpInside);
view.addSubview(colorButton);
colorLabel = UILabel(frame: CGRect(x: 20, y: view.frame.height-50, width: 100, height: 30));
colorLabel.text = "Color";
view.addSubview(colorLabel);
drawStyleButton = UIButton(frame: CGRect(x: 20, y: view.frame.height-90, width: 100, height: 30));
drawStyleButton.backgroundColor = .gray;
drawStyleButton.layer.cornerRadius = 3;
drawStyleButton.alpha = 0.8;
drawStyleButton.setTitle(drawStyleData[0], for: .normal);
drawStyleButton.addTarget(self, action: #selector(pickDrawStyle), for: .touchUpInside);
view.addSubview(drawStyleButton);
drawStylePickerMask = UIButton(frame: view.frame);
drawStylePickerMask.alpha = 0.1;
drawStylePickerMask.addTarget(self, action: #selector(dismissPicker), for: .touchUpInside);
drawStylePickerMask.isHidden = true;
view.addSubview(drawStylePickerMask);
drawStylePicker = UIPickerView(frame: CGRect(x: 0, y: view.frame.height-310, width: view.frame.width, height: 200));
drawStylePicker.backgroundColor = .white;
drawStylePicker.alpha = 0.9;
drawStylePicker.dataSource = self;
drawStylePicker.delegate = self;
drawStylePicker.isHidden = true;
view.addSubview(drawStylePicker);
}
func pickDrawStyle() {
drawStylePicker.isHidden = false;
drawStylePickerMask.isHidden = false;
}
func thicknessBarChanged() {
thickness = Int(thicknessBar.value);
thicknessValueLabel.text = String(Int(thicknessBar.value));
imageView.changeThickness(thickness: thickness);
}
func colorButtonPressed() {
let colorSelectionVC = ColorSelectionViewController(color: color);
colorSelectionVC.delegate = self;
present(colorSelectionVC, animated: true, completion: nil);
}
func setNewColor(color: UIColor) {
self.color = color;
colorButton.backgroundColor = color;
imageView.changeColor(color: color);
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
if let photo = info[UIImagePickerControllerOriginalImage] as? UIImage {
imageView.setImage(image: photo);
}
picker.dismiss(animated: true, completion: nil);
}
func imageHasChanged() {
undoButton.isEnabled = true;
redoButton.isEnabled = false;
}
func numberOfComponents(in pickerView: UIPickerView) -> Int {
return 1;
}
func pickerView(_ pickerView: UIPickerView, numberOfRowsInComponent component: Int) -> Int {
return drawStyleData.count;
}
func pickerView(_ pickerView: UIPickerView, titleForRow row: Int, forComponent component: Int) -> String? {
return drawStyleData[row];
}
func pickerView(_ pickerView: UIPickerView, didSelectRow row: Int, inComponent component: Int) {
drawStyleButton.setTitle(drawStyleData[row], for: .normal);
imageView.changeStyle(style: drawStyleData[row]);
}
func pickerView(_ pickerView: UIPickerView, rowHeightForComponent component: Int) -> CGFloat {
return 50;
}
func dismissPicker() {
drawStylePicker.isHidden = true;
drawStylePickerMask.isHidden = true;
}
}