In my application i need to scan the bar code. for that i am using Linea pro bar code scanning device attached with my iPhone. i need to know the presence of device through code. is it possible? I am new to objective C . Help me to fix this issue.
Thank you.
Yes, it is possible.
All you have to do is this:
int lineaStatus = [[Linea sharedDevice] connstate];
Them just compare them to the different connection states like this.
if(lineaStatus == CONN_DISCONNECTED) {
//Device is connected
} else if(status == CONN_CONNECTED) {
//Device is disconnected.
}
Related
How to change the default camera app in Windows 10 desktop ? The option is available from Settings in Phones but not from Desktops
If you want to make 'advanced' photo capture, then you can use MediaCapture class. Everything about this you will find at MSDN. There are also quite nice samples at GitHub.
It also seems that my old post for WinRT is still quite relevant. You will find there that I'm using GetCameraID:
private static async Task<DeviceInformation> GetCameraID(Windows.Devices.Enumeration.Panel desired)
{
DeviceInformation deviceID = (await DeviceInformation.FindAllAsync(DeviceClass.VideoCapture))
.FirstOrDefault(x => x.EnclosureLocation != null && x.EnclosureLocation.Panel == desired);
if (deviceID != null) return deviceID;
else throw new Exception(string.Format("Camera of type {0} doesn't exist.", desired));
}
to choose a device to be used to capture the photo. In your app you can enumerate devices and choose the one that suits you.
Just started trying to create a menubar for my node webkit app, and I followed the instructions straight from the master Roger Wang himself...here:
https://github.com/rogerwang/node-webkit/wiki/Window-menu
Here is the code:
var gui = require('nw.gui');
var mb = new gui.Menu({type:"menubar"});
mb.createMacBuiltin("your-app-name");
gui.Window.get().menu = mb;
Works beautifully on mac, but makes the PC app not work. Any ideas now to solve it?
Thanks in advance.
I expect that createMacBuiltin isn't defined when you're running on non-Mac platforms. You should probably protect that code with an os-specific check, like this:
var gui = require('nw.gui');
var mb = new gui.Menu({type:"menubar"});
if (process.platform === "darwin") { // this should indicate you're on Mac OSX
mb.createMacBuiltin("your-app-name");
}
gui.Window.get().menu = mb;
This is assuming, of course, that the surrounding code is platform independent and you want it to run on all platforms.
I'm starting with Kinect SDK 1.7, using KinectRegion and other controls like KinectTileButton and KinectScrollViewer from the toolkit. My questions are:
How to enable KinectRegion to work with left and right hands?
Does the SDK 1.7 have something ready to work with zooming?
How to detect grip and release?
Any code available on the Internet?
Thank you!
To Enable the Kinect Region :
Import "Microsoft.Kinect.Toolkit.Controls" project into your solution. (Use Add -> Existing Project)
Add Reference of "Microsoft.Kinect.Toolkit.Controls" into your project.
Add KinectRegion into your XAML using this code :
Import/Use "Microsoft.Kinect.Toolkit.Controls" in your xaml.cs file :
using Microsoft.Kinect.Toolkit;
Bind the sensor chooser's current sensor to the KinectRegion :
var regionSensorBinding = new Binding("Kinect") { Source = this.sensorChooser };
BindingOperations.SetBinding(this.kinectRegion, KinectRegion.KinectSensorProperty,
regionSensorBinding);
I don't get what you mean about "zooming". Please give more detail.
To detect hand gripping and hand release, you can add "AddHandPointerGripHandler" and "AddHandPointerGripReleaseHandler" to your KinectRegion. Please take a look to the KinectScrollViewer.cs.
You can explore the code about the hand pointer and stuff from the "Kinect Developer Toolkit Browser App".
As far as I can remember, KinectRegion works with both hand and automatically detects which one is the main one.
The grip and release detection is also automatic on KinectScrollViewer controls.
About the zooming I have no idea.
You'll find good tutorial on Kinect SDK 1.7 Interactions features on this link
Absolutely outstanding course is on the links below:
The first part shows the basic of Kinect SDK
The second part is similiar to firs part, but with use of MS Blend
And the third part is tutorial for interaction stream, where you can get information of both hands.
But if you´d like to use both hand at Kinect region, you have to edit Microsoft.Kinect.Toolkit.Controls -> KinectRegion.cs -> line 1000 (more info in MSDN Blog question)
It helped to me! (I have the same problem)!
For Grip detection is available in kinectRegion -> kinectRegion.HandPointers[idex of hand(0 is left, 1 is right)].IsInGripInteraction - it´s bool - I added some code:
private Skeleton []skeleton;
private void kinect_SkeletonFrameReady(object sender, SkeletonFrameReadyEventArgs e)
{
using (SkeletonFrame sf = e.OpenSkeletonFrame())
{
if (sf != null && this.skeleton != null) // check that a frame is available
{
sf.CopySkeletonDataTo(this.skeleton); // get the skeletal information in this frame
}
}
}
sensor.SkeletonFrameReady += new EventHandler<SkeletonFrameReadyEventArgs>(kinect_SkeletonFrameReady);
foreach (var sk in skeleton)
{
if (sk.TrackingId == 0) continue;
else
{
if (kinectRegion.HandPointers[0].IsInGripInteraction == true)
{
.......
}
}
}
I have got a MVC4 application where I used 51Degrees (Lite) to detect device and accordingly select the mobile (.mobile.cshtml) or desktop (.cshtml) view. 51Degrees can properly do that job. However if I want to switch from Mobile to Desktop view (on a mobile device) using HttpContext.SetOverriddenBrowser(BrowserOverride.Desktop) it doesn't work. FYI, it works without 51Degrees.
Here is the code to select display mode (Application_Start() in Global.asax.cs):
DisplayModeProvider.Instance.Modes.Insert(0, new DefaultDisplayMode("mobile")
{ContextCondition = Context =>Context.Request.Browser["IsMobile"] == "True"
});
Here is the view switcher controller action code:
public class ViewSwitcherController : Controller
{
public RedirectResult SwitchView(bool mobile, string ReturnUrl="/Login/Login")
{
// If the mobile user has requested to view the mobile view
// remove any overridden user agent for the current request
if (Request.Browser.IsMobileDevice == mobile)
HttpContext.ClearOverriddenBrowser();
else
// Otherwise override the browser setting to desktop mode
HttpContext.SetOverriddenBrowser(mobile ? BrowserOverride.Mobile : BrowserOverride.Desktop);
return Redirect(ReturnUrl);
}
}
Here is the code in the view to switch to Desktop view:
#Html.ActionLink("Desktop view", "SwitchView", "ViewSwitcher", new { mobile = false, ReturnUrl = Request.Url.PathAndQuery }, new { rel = "external" })
Please let me know if I'm missing something.
Thanks in advance.
Sorry for my long delayed answer.
The following solution was provided by one of the developers at 51Degrees:
DisplayModeProvider.Instance.Modes.Insert(0, new DefaultDisplayMode("mobile")
{
ContextCondition = Context => Context.GetOverriddenBrowser()["IsMobile"] == "true"
});
So replacing Context.Request.Browser["IsMobile"] with Context.GetOverriddenBrowser()["IsMobile"] fixes my problem.
Hope that helps.
I know this is a bit dated, but I ran into this tonight. Same symptoms. Works without Mobi51, does not with. My working theory is that Request.Browser.IsMobileDevice is touched by Mobi51 and it takes control of that property and sets its value regardless of what you would expect .NET to do with it.
My current solution is this. When I check in my viewstart file to switch layouts I check that both Request.Browser.IsMobileDevice and Context.GetOverridenBrowser().IsMobileDevice are true.
When it's truly Mobile, both will be true. When it's truly desktop, both are false. When it's a mobile view requesting desktop, Request.Browser.IsMobileDevice will be true (because Mobi51 says so) and Context.GetOverridenBrowser().IsMobileDevice will be false. Here's my viewstart
#{
Layout = Request.Browser.IsMobileDevice && Context.GetOverriddenBrowser().IsMobileDevice
? "~/Views/Shared/_LayoutMobile.cshtml"
: "~/Views/Shared/_Layout.cshtml";
}
I'm still vetting this and have to add desktop to mobile switching still (which I can already see a problem, but the change to make that direction work as well is easy enough , but in my five minutes of testing so far tonight this has worked. I'm curious if you found another reason/way to work with this, or if this solution is satisfactory for you.
Is possible to detect if volume hardware control is down or up? i need to play sound on button touch in my application, and i want to send a message to user that volume is down and to use this app he need to change hardware
EDIT:
I need to do something like this:
BOOL VolumeHardwareControl = getHardwareInfo();
if(VolumeHardwareControl==NO){
message: "Attention! To play sound you need to turn hardware on!"
}else
playSound();
UInt32 routeSize = sizeof (CFStringRef);
CFStringRef route;
AudioSessionGetProperty (
kAudioSessionProperty_AudioRoute,
&routeSize,
&route
);
if (route == NULL) {
NSLog(#"Silent switch is on");
}