sample-iOS-CameraApp/app/app.js at master · NativeScript/sample-iOS-CameraApp · GitHub

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var RELATIVE_DOT_SIZE = 0.2;

var RELATIVE_TOUCH_SIZE = 0.25;

var RELATIVE_ICONS_DISTANCE = 0.7;

var GAP_EPSILON = 0.01;

var SELECTION_RELATIVE_INNER_RADIUS = 0.95;

var SELECTION_RELATIVE_OUTER_RADIUS = 1;

var BUTTON_RELATIVE_INNER_RADIUS = 0.3;

var BUTTON_RELATIVE_OUTER_RADIUS = 0.92;

var CLOSED_SCALE_FACTOR = 0.2;

var CLOSED_ALPHA = 0;

var OPENED_SCALE_FACTOR = 1;

var OPENED_ALPHA = 1;

var CAPTURE_BUTTON_STROKE_WIDTH = 3;

var ShotButton = UIControl.extend({

initWithFrame: function(frame) {

var self = this.super.initWithFrame(frame);

if (self) {

self.backgroundColor = UIColor.clearColor();

}

return self;

drawRect: function (rect) {

var halfW = rect.size.width * 0.5 - CAPTURE_BUTTON_STROKE_WIDTH * 0.5;

var halfH = rect.size.height * 0.5 - CAPTURE_BUTTON_STROKE_WIDTH * 0.5;

var r = Math.min(halfW, halfH);

var x = halfW;

var y = halfH;

var ctx = UIGraphicsGetCurrentContext();

UIColor.redColor().setFill();

UIColor.whiteColor().setStroke();

CGContextAddArc(ctx, rect.size.width / 2, rect.size.height / 2, r, 0, Math.PI * 2, 0);

CGContextFillPath(ctx);

CGContextSetLineWidth(ctx, CAPTURE_BUTTON_STROKE_WIDTH);

CGContextAddArc(ctx, rect.size.width / 2, rect.size.height / 2, r, 0, Math.PI * 2, 0);

CGContextStrokePath(ctx);

}

}, {

});

var ArcView = UIView.extend({

initWithOptions: function(options) {

var self = this.super.initWithFrame(options.frame);

if (self) {

self.options = options;

self.backgroundColor = UIColor.clearColor();

self.userInteractionEnabled = false;

}

return self;

drawRect: function (rect) {

var halfW = rect.size.width * 0.5;

var halfH = rect.size.height * 0.5;

var r = Math.min(halfW, halfH);

var x = halfW;

var y = halfH;

var rInner = r * this.options.rInner;

var rOuter = r * this.options.rOuter;

var from = this.options.segment * -0.5;

var to = this.options.segment * +0.5;

var ctx = UIGraphicsGetCurrentContext();

this.options.color.setFill();

CGContextAddArc(ctx, x, y, rOuter, from, to, 0);

CGContextAddArc(ctx, x, y, rInner, to, from, 1);

CGContextFillPath(ctx);

}

}, {

});

var DialSelector = UIControl.extend({

initWithOptions: function (options) {

var self = this.super.initWithFrame(options.frame);

if (self) {

self.options = options;

self.backgroundColor = UIColor.clearColor();

self.childFrame = CGRectMake(0, 0, options.frame.size.width, options.frame.size.height);

self.dotBackgroundColor = UIColor.alloc().initWithRedGreenBlueAlpha(0, 0, 0, 0.7);

self.optionsCount = 5;

self.segmentsCount = 8;

self.createButtons();

self.selectedIndex = Math.floor(self.optionsCount / 2);

self.value = self.options.values[self.selectedIndex];

self.selectedAngle = (-self.selectedIndex / self.segmentsCount - 0.25) * Math.PI * 2;

self.createSelection();

self.createLabel();

self.addSelectionViews();

}

return self;

createLabel: function () {

this.label = new UILabel(this.childFrame);

this.label.textAlignment = NSTextAlignment.NSTextAlignmentCenter;

this.label.textColor = UIColor.whiteColor();

this.label.text = this.options.text;

this.addSubview(this.label);

createButtons: function() {

this.buttons = new Array(this.segmentsCount);

var segment = Math.PI * 2 / this.segmentsCount - GAP_EPSILON;

var buttonOptions = {

frame: this.childFrame,

color: UIColor.alloc().initWithRedGreenBlueAlpha(0, 0, 0, 0.7),

rInner: BUTTON_RELATIVE_INNER_RADIUS,

rOuter: BUTTON_RELATIVE_OUTER_RADIUS,

segment: segment

};

for (var i = 0; i < this.segmentsCount; i++) {

var button = ArcView.alloc().initWithOptions(buttonOptions);

this.buttons[i] = button;

button.transform = CGAffineTransformRotate(CGAffineTransformMakeScale(CLOSED_SCALE_FACTOR, CLOSED_SCALE_FACTOR), Math.PI * 2 * i / this.segmentsCount);

button.alpha = CLOSED_ALPHA;

this.addSubview(button);

}

createSelection: function () {

var segment = Math.PI * 2 / this.segmentsCount - GAP_EPSILON;

this.selectorArc = ArcView.alloc().initWithOptions({

frame: this.childFrame,

color: UIColor.redColor(),

rInner: SELECTION_RELATIVE_INNER_RADIUS,

rOuter: SELECTION_RELATIVE_OUTER_RADIUS,

segment: segment

});

this.selectorArc.transform = CGAffineTransformScale(CGAffineTransformMakeRotation(this.selectedAngle), 0.2, 0.2);

this.selectorArc.alpha = 0;

this.addSubview(this.selectorArc);

addSelectionViews: function () {

for (var i = 0; i < this.options.views.length; i++) {

var item = this.options.views[i];

item.center = { x: this.xCenter, y: this.yCenter };

this.addSubview(item);

item.alpha = CLOSED_ALPHA;

}

get xCenter() {

return this.frame.size.width * 0.5;

get yCenter() {

return this.frame.size.height * 0.5;

get maxRadius() {

return Math.min(this.frame.size.width * 0.5, this.frame.size.height * 0.5);

beginTrackingWithTouchWithEvent: function (touch, event) {

this.sendActionsForControlEvents(UIControlEvents.UIControlEventEditingDidBegin);

this.bloom(OPENED_SCALE_FACTOR, OPENED_ALPHA);

return true;

continueTrackingWithTouchWithEvent: function (touch, event) {

var location = touch.locationInView(this);

var wHalf = this.frame.size.width * 0.5;

var hHalf = this.frame.size.height * 0.5;

var r = Math.min(wHalf, hHalf);

var xCenter = wHalf;

var yCenter = hHalf;

var dx = location.x - xCenter;

var dy = location.y - yCenter;

var distance = Math.sqrt(Math.pow(dx, 2) + Math.pow(dy, 2));

if (distance <= r * RELATIVE_TOUCH_SIZE) {

// We are too close to the center so we won't change the selection.

} else {

var angle = Math.atan2(dy, dx);

var twoPi = Math.PI * 2;

var steps = this.segmentsCount;

var newSelectedIndex = (Math.round(-angle / twoPi * steps) + Math.round(this.segmentsCount * 0.75)) % this.segmentsCount;

var newSelectedAngle = -newSelectedIndex / steps * twoPi - Math.PI * 0.5;

if (newSelectedIndex >= 0 && newSelectedIndex < this.optionsCount && this.selectedIndex != newSelectedIndex) {

// Set newly selected values.

this.selectedIndex = newSelectedIndex;

this.selectedAngle = newSelectedAngle;

this.value = this.options.values[newSelectedIndex];

// Rotate the selector arc with animation.

UIView.beginAnimationsContext(null, null);

UIView.setAnimationDelegate(this);

UIView.setAnimationDuration(0.2);

UIView.setAnimationCurve(UIViewAnimationCurve.UIViewAnimationCurveEaseOut);

this.selectorArc.transform = CGAffineTransformMakeRotation(this.selectedAngle);

UIView.commitAnimations();

// Notify observers.

this.sendActionsForControlEvents(UIControlEvents.UIControlEventValueChanged);

}

return true;

endTrackingWithTouchWithEvent: function (touch, event) {

this.sendActionsForControlEvents(UIControlEvents.UIControlEventEditingDidEnd);

this.bloom(CLOSED_SCALE_FACTOR, CLOSED_ALPHA);

distance: function (point) {

return Math.sqrt(Math.pow(point.x - this.xCenter, 2) + Math.pow(point.y - this.yCenter, 2));

pointInsideWithEvent: function (point, event) {

return this.distance(point) < this.maxRadius * RELATIVE_TOUCH_SIZE;

drawRect: function (rect) {

var ctx = UIGraphicsGetCurrentContext();

console.log(ctx);

this.dotBackgroundColor.setFill();

CGContextAddArc(ctx, this.xCenter, this.yCenter, this.maxRadius * RELATIVE_DOT_SIZE, 0, Math.PI * 2, 0);

CGContextFillPath(ctx);

bloom: function (scale, alpha) {

UIView.beginAnimationsContext(null, null);

UIView.setAnimationDelegate(this);

UIView.setAnimationCurve(UIViewAnimationCurve.UIViewAnimationCurveEaseOut);

UIView.setAnimationDuration(0.2);

this.selectorArc.transform = CGAffineTransformScale(CGAffineTransformMakeRotation(this.selectedAngle), scale, scale);

this.selectorArc.alpha = alpha;

for (var i = 0; i < this.segmentsCount; i++) {

var button = this.buttons[i];

UIView.setAnimationDuration(i * 0.05 + 0.03);

button.transform = CGAffineTransformRotate(CGAffineTransformMakeScale(scale, scale), Math.PI * 2 * i / this.segmentsCount);

button.alpha = alpha;

}

for (var i = 0; i < this.optionsCount; i++) {

var item = this.options.views[i];

var angle = i / (this.optionsCount - 1) * -Math.PI - Math.PI * 0.5;

UIView.setAnimationDuration((this.optionsCount - 1 - i) * 0.05 + 0.1);

item.transform = CGAffineTransformMakeTranslation(Math.cos(angle) * this.maxRadius * RELATIVE_ICONS_DISTANCE * scale, Math.sin(angle) * this.maxRadius * RELATIVE_ICONS_DISTANCE * scale);

item.alpha = alpha;

}

UIView.commitAnimations();

}

}, {

});

var CameraViewController = UIViewController.extend({

viewDidLoad: function () {

UIViewController.prototype.viewDidLoad.apply(this, arguments);

this.createCamera();

this.createControls();

this.updateCamera();

this.createShotButton();

createCamera: function() {

// Init capture session

this.session = new AVCaptureSession();

this.session.sessionPreset = AVCaptureSessionPreset1280x720;

// Adding capture device

this.device = AVCaptureDevice.defaultDeviceWithMediaType(AVMediaTypeVideo);

this.input = AVCaptureDeviceInput.deviceInputWithDeviceError(this.device, null);

if (!this.input) {

throw new Error("Error trying to open camera.");

}

this.session.addInput(this.input);

this.output = new AVCaptureStillImageOutput();

this.session.addOutput(this.output);

this.session.startRunning();

// Add a preview layer in the UI

this.videoLayer = AVCaptureVideoPreviewLayer.layerWithSession(this.session);

this.videoLayer.frame = this.view.bounds;

this.view.layer.addSublayer(this.videoLayer);

createControls: function() {

// Add white balance dial

this.whiteBalance = DialSelector.alloc().initWithOptions({

frame: CGRectMake(110, 70, 320, 320),

text: "WB",

views: this.createImages([

"cloudy@2x.png",

"sunny@2x.png",

"auto@2x.png",

"tungsten@2x.png",

"fluorescent@2x.png"

]),

values: [

{ auto: false, redGain: 2.4, greenGain: 1, blueGain: 2.2 },

{ auto: false, redGain: 2.2, greenGain: 1, blueGain: 2.1 },

{ auto: true, redGain: 2, greenGain: 1, blueGain: 2 },

{ auto: false, redGain: 1.8, greenGain: 1, blueGain: 1.9 },

{ auto: false, redGain: 2.1, greenGain: 1, blueGain: 2 }

]

});

this.subscribeDialEditBeginEnd(this.whiteBalance);

this.whiteBalance.addTargetActionForControlEvents(this, "updateCamera", UIControlEvents.UIControlEventValueChanged);

this.view.addSubview(this.whiteBalance);

// Add iso dial

this.iso = DialSelector.alloc().initWithOptions({

frame: CGRectMake(110, 150, 320, 320),

text: "ISO",

views: this.createLabels(["32", "64", "128", "256", "512"]),

values: [34, 65, 128, 256, 512]

});

this.subscribeDialEditBeginEnd(this.iso);

this.iso.addTargetActionForControlEvents(this, "updateCamera", UIControlEvents.UIControlEventValueChanged);

this.view.addSubview(this.iso);

// Add exposure dial

this.exposure = DialSelector.alloc().initWithOptions({

frame: CGRectMake(110, 230, 320, 320),

text: "EX",

views: this.createLabels(["5", "10", "20", "50", "100"]),

values: [5, 10, 20, 50, 100]

});

this.subscribeDialEditBeginEnd(this.exposure);

this.exposure.addTargetActionForControlEvents(this, "updateCamera", UIControlEvents.UIControlEventValueChanged);

this.view.addSubview(this.exposure);

createLabels: function (texts) {

var rect = CGRectMake(0, 0, 40, 40);

return texts.map(function (t) {

var l = new UILabel(rect);

l.text = t;

l.textAlignment = NSTextAlignment.NSTextAlignmentCenter;

l.textColor = UIColor.whiteColor();

return l;

});

createImages: function (paths) {

var rect = CGRectMake(0, 0, 40, 40);

return paths.map(function (p) {

var uiImage = UIImage.imageWithContentsOfFile(__dirname + "/assets/" + p);

var uiImageView = new UIImageView(rect);

uiImageView.image = uiImage

return uiImageView;

});

createShotButton: function() {

this.shotButton = ShotButton.alloc().initWithFrame(CGRectMake(130, 500, 60, 60));

this.shotButton.addTargetActionForControlEvents(this, "takePhoto", UIControlEvents.UIControlEventTouchUpInside);

this.view.addSubview(this.shotButton);

takePhoto: function () {

var videoConnection = this.output.connections[0];

this.output.captureStillImageAsynchronouslyFromConnectionCompletionHandler(videoConnection, function (buffer, error) {

var imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(buffer);

var image = UIImage.imageWithData(imageData);

UIImageWriteToSavedPhotosAlbum(image, null, null, null);

AudioServicesPlaySystemSound(144);

});

subscribeDialEditBeginEnd: function (control) {

control.addTargetActionForControlEvents(this, "dialBeginEdit", UIControlEvents.UIControlEventEditingDidBegin);

control.addTargetActionForControlEvents(this, "dialEndEdit", UIControlEvents.UIControlEventEditingDidEnd);

dialBeginEdit: function (control) {

UIView.beginAnimationsContext(null, null);

UIView.setAnimationDelegate(this);

UIView.setAnimationCurve(UIViewAnimationCurve.UIViewAnimationCurveEaseOut);

UIView.setAnimationDuration(0.2);

this.whiteBalance.alpha = control == this.whiteBalance ? 1 : 0;

this.iso.alpha = control == this.iso ? 1 : 0;

this.exposure.alpha = control == this.exposure ? 1 : 0;

UIView.commitAnimations();

dialEndEdit: function (control) {

UIView.beginAnimationsContext(null, null);

UIView.setAnimationDelegate(this);

UIView.setAnimationCurve(UIViewAnimationCurve.UIViewAnimationCurveEaseOut);

UIView.setAnimationDuration(0.2);

this.whiteBalance.alpha = 1;

this.iso.alpha = 1;

this.exposure.alpha = 1;

UIView.commitAnimations();

updateCamera: function () {

if (UIDevice.currentDevice().systemVersion[0] >= 8) {

this.device.lockForConfiguration(null);

this.device.whiteBalanceMode = this.whiteBalance.value.auto ? AVCaptureWhiteBalanceMode.ContinuousAutoWhiteBalance : AVCaptureWhiteBalanceMode.Locked;

if (!this.whiteBalance.value.auto) {

this.device.setWhiteBalanceModeLockedWithDeviceWhiteBalanceGainsCompletionHandler(this.whiteBalance.value, null);

}

this.device.setExposureModeCustomWithDurationISOCompletionHandler({ value: this.exposure.value, timescale: 1000, epoch: 0, flags: 1 }, this.iso.value, null);

this.device.unlockForConfiguration();

} else {

var alert = new UIAlertView();

alert.title = 'iOS 8.X required';

alert.show();

}

shouldAutorotate: function () {

return false;

}

}, {

exposedMethods: {

'dialBeginEdit': { returns: interop.types.void, params: [interop.types.id] },

'dialEndEdit': { returns: interop.types.void, params: [interop.types.id] },

'updateCamera': { returns: interop.types.void },

'takePhoto': { returns: interop.types.void }

}

});

var AppDelegate = UIResponder.extend({

applicationDidFinishLaunchingWithOptions: function () {

this._window = new UIWindow(UIScreen.mainScreen().bounds);

this._window.backgroundColor = UIColor.blackColor();

this._window.rootViewController = new CameraViewController();

this._window.makeKeyAndVisible();

return true;

}

}, {

name: "AppDelegate",

protocols: [UIApplicationDelegate]

});

UIApplicationMain(0, null, null, "AppDelegate");

sample-iOS-CameraApp/app/app.js at master · NativeScript/sample-iOS-CameraApp · GitHub

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