pinchzoom

问题 I need to create a Mobile Application using jquery Mobile. I don't understand how to implement pinch-zooming for an image that is displayed in the app. 回答1: Is there a particular reason to use jQuery Mobile for this? The fact your application UI uses it to build your UI does not mean this behavior needs to be implemented using it. The are other options, like the below jQuery plug-in. Note that a Worklight application by default uses jQuery anyway. So you're "half-way" there. I've successfully

问题 Is there a way to set the ScaleType of a ImageView as CENTER using Matrix ScaleType? I'm in need of Center orientation of an image in the ImageView. Problem occurs when I set the size of the ImageView larger than the screen say 1000dp. By doing so my image sticks to the corners. If I use layout_margins, I'm not able to pinch and zoom the image properly. Please help me find a solution. 来源： https://stackoverflow.com/questions/21366354/how-to-use-scaletype-of-a-imageview-as-center-and-matrix-at

问题 I need to be able to do pinch to zoom to scale font sizes, on both Android and iOS. (Not just a regular image per numerous examples I've seen when Googling). Can someone let me know if theres an easy way to do this in Ionic 3? Documentation, infers you can use (pinch). But this never works out of the box. I know Ionic uses Hammer.JS under the covers... per this source. Ionic Forums suggests you can enable it using a combination of @ViewChild and manually adding listen and on handler. Then for

问题 I need to call interface while double tap on google mapFragment. I am able to detect double tap on map now. This is my TouchableWrapper class public class TouchableWrapper extends FrameLayout { GestureDetectorCompat mGestureDetector; public TouchableWrapper(Context context) { super(context); mGestureDetector = new GestureDetectorCompat(context, mGestureListener); } private final GestureDetector.SimpleOnGestureListener mGestureListener = new GestureDetector.SimpleOnGestureListener() {

问题 My goal is to create a pinch to zoom edittext. After some googling, someone kind enough to share this class on github: public ZoomEditTextView(Context context, AttributeSet attrs) { super(context, attrs, 0); this.mContext = context; init(); } public ZoomEditTextView(Context context) { super(context, null, 0); this.mContext = context; init(); setFocusable(true); requestFocus(); /*@formatter:off this.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent

问题 I want to do a pinch/zoom having the zoom start at the current scale. I have tried the following code: @objc func pinchedView(recognizer:UIPinchGestureRecognizer) { if (recognizer.state == .ended) { lastScale = 1.0 return } let scale = 1.0 - (lastScale - recognizer.scale) let zoomInAction = SKAction.scale(to: cameraNode.yScale + scale, duration: 0.25) lastScale = recognizer.scale cameraNode.run(zoomInAction) } The problem is that it keeps getting smaller and smaller no matter which way I

问题 I am making an app that is using HorizontalScrollView for showing list of items. So I have multiple views inside HorizontalScrollView for horizontal scrolling. I am changing the layout size of a view on detecting pinch zoom according to scaleFactor I have implemented it at view level so when user pinch zoom having both finger inside a single view, that view is detecting pinch zoom and changing its size but when I pinch zoom with my fingers in different views this is not working. I want to

问题 I want to know how can I detect a Zoom/pinch gesture made on UserControl? Following is my XAML code. How can i detect this in "Grid_OnManipulationDelta" or "Grid_OnManipulationCompleted" methods? Thanx for the help in advance. <UserControl x:Class="HCMainWPF.Views.MainView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas

问题 Increase or decrease font size smoothly whenever user resize label using pinch gesture on it. Note Without compromising quality of font Not only transforming the scale of UILabel With support of multiline text Rotation gesture should work proper with pinch gesture Reference: SnapChat or Instagram Text Editor tool extension String { func height(withConstrainedWidth width: CGFloat, font: UIFont) -> CGFloat { let constraintRect = CGSize(width: width, height: .greatestFiniteMagnitude) let

问题 Here is my code... just a simple test as I have never used hammer.js before: var hammerTime = new Hammer($('#hammerTarget').get(0)); hammerTime.add(new Hammer.Pinch({event: 'pinch'})); // Add pinch gesture events. hammerTime.on('pinchin', function(event) { console.log('hammer pinchin'); }).on('pinchout', function(event) { console.log('hammer pinchout'); }).on('pinchend', function(event) { console.log('hammer pinchend'); }); This works fine, I can detect the pinch, but now on my pinch target I