pinchzoom

Correct way to use a matrix to zoom an imageview around a focal point

由 為{幸葍}努か 提交于 2019-12-07 19:54:44
问题 Let me start off by saying I've read through a fair amount of zoom questions and recalculating coordinates on here. But I can't seem to apply them to my situation. I have a custom ImageView class that can zoom and scroll. The problem I am having comes from doing the following in this order: Zooming in on a point, and using that point as a focal point (this works) Scrolling while still zoomed in Trying to zoom either in/out on a different point ( doesn't work ) Here is a example of the custom

Android Pinch to Zoom ImageView

由 落爺英雄遲暮 提交于 2019-12-07 05:54:09
问题 I have a single Image ImageView Layout . import android.app.Activity; import android.os.Bundle; public class americanfootball extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.americanfootball); } } How to enable simple pinch to zoom on the image ? 回答1: You have to use a custom ImageView to do that. use something like this: import android.content.Context; import android.graphics.Canvas; import android

Windows 8.1 Metro app - Pinch and zoom an Image

由 ￡可爱￡侵袭症＋ 提交于 2019-12-07 04:53:09
问题 Is there any way to implement pinch and zoom the image control inside XAML in Windows 8.1, i am trying Manipulation delta event. But that event not get fired, also i tried setting ManipulationMode="All". <Image x:Name="kn" ManipulationMode="All" ManipulationDelta="kn_ManipulationDelta" HorizontalAlignment="Center" VerticalAlignment="Center" Height="315" Width="360" RenderTransformOrigin="0.5, 0.5"> <Image.RenderTransform> <CompositeTransform></CompositeTransform> </Image.RenderTransform> <

Image effects with rotation and pinch to zoom using GLSurfaceView Android

由 此生再无相见时 提交于 2019-12-07 01:24:54
问题 I was developing an application to apply effects/rotation/pinch to zoom in-out functionality on image. I have downloaded demo application from https://github.com/Grishu/ImageEffects. It works well, now my problems/questions are as below: Apply multiple effects on images with progress change value (e.g. First apply brightness effect and result of this apply another effect say "contrast".) - problem: in code effect always apply on original image. So change in code to apply effect on final image

pinch zoom effect with Android SurfaceView

由 耗尽温柔 提交于 2019-12-06 09:47:40
问题 I want to zoom SurfaceView so that,we can video player and camera too.I searched lot but didn’t found any proper guideline.Lot of question have been asked related to this but no proper solution I found.Actually For Pinch zoom we use Matrix but problem is that SurfaceView doesn’t support Matrix.so can any suggest me how to do this.I went through this for PinchZoom. Your proper guideline will be great appreciated.Thanks 回答1: You can set MarginLayoutParams properly. See source code below for

How to imlement ZoomPinch Gesture in Fragment

由 末鹿安然 提交于 2019-12-06 07:59:46
i had used ScaleGestureDetector. I used this code but it doesnt work in fragment and also it doesnt shows any error Please anyone can help me with this thanx in advance but when i use the same code in activity it works perfectly public class Fragment2 extends Fragment { ImageView imgZoom; Matrix matrix = new Matrix(); float scale = 1f; ScaleGestureDetector SGD; // Keep all Images in array Integer[] mThumbIds = { R.drawable. car1, R.drawable.car2, R.drawable.car3, R.drawable.car4, R.drawable.car5,R.drawable.car6, R.drawable.car7,R.drawable.car8, R.drawable.car9,R.drawable.car10, R.drawable

Xamarin Forms pinch and pan together

由 感情迁移 提交于 2019-12-06 07:55:14
问题 I have implemented both pan and pinch individually, and it works fine. I'm now trying to use pinch and pan together and I'm seeing some issues. Here's my code: XAML: <AbsoluteLayout x:Name="PinchZoomContainer"> <controls:NavBar x:Name="NavBar" ShowPrevNext="true" ShowMenu="false" IsModal="true" /> <controls:PanContainer x:Name="PinchToZoomContainer"> <Image x:Name="ImageMain" /> </controls:PanContainer> </AbsoluteLayout> Pinch/Pan Gesture Add's: var panGesture = new PanGestureRecognizer();

Correct way to use a matrix to zoom an imageview around a focal point

由 ↘锁芯ラ 提交于 2019-12-06 04:37:33
Let me start off by saying I've read through a fair amount of zoom questions and recalculating coordinates on here. But I can't seem to apply them to my situation. I have a custom ImageView class that can zoom and scroll. The problem I am having comes from doing the following in this order: Zooming in on a point, and using that point as a focal point (this works) Scrolling while still zoomed in Trying to zoom either in/out on a different point ( doesn't work ) Here is a example of the custom view. There are two circles: red and green. red is where the focal point should be and green is where

canvas.scale(scale,scale,px,py) jerks to a new position

由 删除回忆录丶 提交于 2019-12-06 01:55:00
I am trying to use both scalegesture listener and gesturelistener in the view. Everything works perfectly if the scale is 1 but if the scale is set to some other value, the image jerks to a new position and then scales smoothly. Part of my code looks like as follows: public class SimpleView extends View { Bitmap image; ScaleGestureDetector scaleGesture; GestureDetector gestures; float touchX, touchY; float horizontalOffset; float verticalOffset; float scale; public SimpleView(Context context) { super(context); image = BitmapFactory.decodeResource(getResources(), R.drawable.some_image);

Android Pinch to Zoom ImageView

由 旧城冷巷雨未停 提交于 2019-12-05 10:25:14
I have a single Image ImageView Layout . import android.app.Activity; import android.os.Bundle; public class americanfootball extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.americanfootball); } } How to enable simple pinch to zoom on the image ? You have to use a custom ImageView to do that. use something like this: import android.content.Context; import android.graphics.Canvas; import android.graphics.drawable.BitmapDrawable; import android.util.AttributeSet; import android.util.Log; import android
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