[TIMOB-5224] Android: Expose "pinch" events in Ti.UI.View

We need to have the event handler for pinch gestures available for TIUIView objects and their derivatives This is needed for many projects we've been a apart of. We recently implemented this in the soon to be available openGL module development project (ios only so far) and it seems to work for our needs there. Having this available for all views and objects that are based on view objects would be very useful. Here are the code snippets from the IOS side: Added this to the view initialization: UIPinchGestureRecognizer *pinchRecognizer; pinchRecognizer=[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(foundPinch:)]; [controller.view addGestureRecognizer:pinchRecognizer]; [pinchRecognizer release]; here's the callback: - (void)foundPinch:(UIPinchGestureRecognizer *)recognizer { NSDictionary *event = [NSDictionary dictionaryWithObjectsAndKeys:NUMDOUBLE(recognizer.scale), @"scale", NUMDOUBLE(recognizer.velocity), @"velocity", nil]; [self.proxy fireEvent:@"pinch" withObject:event]; } here's how we use it now on the opengl view opengl.addEventListener('pinch', function { scale = e.scale; });

Test Case

var baseHeight = 200;
var baseWidth = 200;

var win = Ti.UI.createWindow({
	backgroundColor: '#fff',
	fullscreen: false,
	exitOnClose: true
});
var view = Ti.UI.createView({
	height: baseHeight,
	width: baseWidth,
	backgroundColor: '#a00'
});
var label = Ti.UI.createLabel({
	text: baseWidth + ' x ' + baseHeight,
	color: '#fff',
	font: {
		fontSize: 24,
		fontWeight: 'bold'
	}
});
view.add(label);
win.add(view);

view.addEventListener('pinch', function(e) {
	view.height = baseHeight * e.scale;
	view.width = baseWidth * e.scale;
	label.text = Math.round(view.width) + ' x ' + Math.round(view.height);
});
view.addEventListener('touchstart', function(e) { 
	baseHeight = view.height;
	baseWidth = view.width;
});

win.open();