overlay

I have a drawing pad, and want to overlay an image that is just an outline (so the image is transparent except for some black lines).

由 为君一笑 提交于 2019-12-13 08:08:50
问题 I have it so that you can draw under the image, but you must start drawing outside of the image border and move under the image. So you can't start right on the image. How do I fix this? My html is just: <canvas id="canvas"></canvas> <img id="html5" src="http://i.imgur.com/Wpx3Vum.png" style="position:absolute;left:100px;top:15px;" /> 回答1: You can use two canvas elements instead: Put two canvas elements on top of each other Draw the image you want to superimpose on the top canvas Add mouse

Drawing a rectangle onto a Google Map

由 試著忘記壹切 提交于 2019-12-13 07:37:26
问题 My plan is to allow user to draw a rectangle onto a map in order to mark an area and later save it. I found a method to do it, but it does nothing. Here is how the code looks so far. public class Map extends MapActivity{ private MapView mvMap; MapController kontrol; float xs, ys, xe, ye; GeoPoint start, end; private Paint paint = new Paint(); private boolean up = false; @Override protected void onCreate(Bundle arg0) { // TODO Auto-generated method stub super.onCreate(arg0); setContentView(R

CSS: Div straddling 2 other divs

由 风流意气都作罢 提交于 2019-12-13 06:25:08
问题 I'm curious whether it's possible with CSS to have a <div> overlaying the <div> above and below, like so: I've tried to use margin-top: -40px; , but that doesn't seem to work. I've tried position:relative; without any luck, either. Any ideas? Thanks! 回答1: Sure! Demo Fiddle The trick is managing the positioning of your div s, then setting the offset (top) correctly for the div you want overlapping. <div></div> <div> <div></div> </div> CSS div { width:100%; height:100px; position:relative; /*

Remove inheritance of opacity from parent?

由 淺唱寂寞╮ 提交于 2019-12-13 04:35:03
问题 I have a div tag. I want to remove the children's inheritance of #overlay 's opacity Here is my code: <body id="bg"> <div id="overlay"> <header id="colortext">dgjdhgjdhd</header> </div> </body> And this my css code. #bg{ background-repeat: no-repeat; background-attachment: fixed; background-size: cover; background-image: url(../Images/bg.jpg); } #overlay{ position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 10000; background-color: #000; -moz-opacity:0.5; -khtml-opacity: 0.5;

How to prevent overlays on the map from disappearing when zoom scale changes in swift?

由 随声附和 提交于 2019-12-13 04:18:55
问题 I am trying to render an overlay (polygon) on the map using swift MapKit. I can render successfully but when I zoom out too much then zoom in again, all the rendered polygons get disappear. How can I prevent that from happening and force the rendered polygons to stay on the map at all zoom scales? I am using MapKit and MKPolygonRenderer. I add the polygons to the map using the following method in my viewController: // function to add polygon overlay to the map private func addPolygonsToMap()

Custom TileProvider with Polygon in Android maps

由 老子叫甜甜 提交于 2019-12-13 00:55:39
问题 I'm having problems drawing a polygon on Android map. The problem is that I have TileOverlays so the polygon is kinda under the overlays. I'm drawing a polygon on GoogleMap like this: map.addPolygon(new PolygonOptions().add(points).strokeColor(Color.RED).strokeWidth(3f)); map.animateCamera(CameraUpdateFactory.newLatLngZoom(points[0], 18)); I can see the polygon before the tiles are starting to load but then it's gone. I would like to achieve that the polygon is drawn over the TileProvider. I

Java: Superimpose/overlay animated gif on other animated gif

由 早过忘川 提交于 2019-12-13 00:25:36
问题 I'm making a small game. It's not an action one, but a puzzle one, so performance is not quite as important. Now, I have the main game area, a background image. In certain occasions, I want to draw other images over parts of the background image. My problem is that both the background image as well as the superimposed one(s) can be animated gifs, with an unknown number of frames (basically, user selected). Now, what I want to do is basically: Draw the background image and have it animated (if

How do you tell whether UIImagePickerController cameraOverlayview will rotate or not?

由 隐身守侯 提交于 2019-12-13 00:16:22
问题 IOS 6 on the Ipad rotates the UIImagePickerController cameraOverlayView on landscape mode, but IOS 6 on the iphone 3GS does not - thank you Apple! I dont know the behaviour for IOS 5, or other devices, so is there a way of predicting this behaviour so i can apply a rotation transform on the overlay view? thanks 回答1: I had this issue as well. Here's what I discovered: In the Target's "iPad Deployment Info" config, make sure you've enabled "Landscape Left" and "Landscape Right" modes - even if

Position Fixed Broken in Chrome with Flash behind

由 纵饮孤独 提交于 2019-12-12 18:08:35
问题 I have a strange bug that recently started happening in Chrome (works fine in IE, FF and even Safari). This was working a few weeks ago, so I am assuming this is a bug that came about in a recent Chrome build. Basically I have flash fixed "behind" the page, and I have an overlay fixed above the page (controls for video). I know Chrome 22 included separate stacking contexts for fixed elements, but this was working a few weeks ago and we are on Chrome 27 now, so that does not seem to be

Is there a way that I can make an overlay view on the iPhone SDK?

由 天大地大妈咪最大 提交于 2019-12-12 18:06:35
问题 I've seen examples of overlay views in different iPhone apps (Skype, Phone.app (while making a call), Google Mobile) and I was wondering how I could do the same in an app. I'm making an app which has a record button in it and when that button is pressed, I want a nice looking overlay (similar to the overlay view that appears when making a call on the iPhone) that says "Recording" with a count in seconds to appear along with a stop button. Is there any guide or anything I can look at to help
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