How to Drop an image from Client Computer to WPF app.
For example dropping image file from a folder or desktop to WPF app and the dropped image should be saved and showed in that dropped window as just an image.
I've searched here similar questions to my question and I couldn't find what I need.
Please help me!
Thank you in advance :)
In target element (or at the window level) set the AllowDrop property to true. Then provide the element or window the DragDrop event handler.
In the event handler you will be able to get the filepath with something like:
e.Data.GetData(DataFormats.FileDrop, true)
Now that you know the location of the file you can do what you like with it.
Related
I am trying to make an application that will "trigger" when a certain image is shown on screen. I have the app streaming the camera to the screen inside the app using AVCaptureSession. Now i was wondering how to make some sort of EventHandler for each frame of the video, in which i will check to see if the image contains one of my triggers. Does anyone know the best way to handle this? I could not find any resources on an OnFrame EventHandler for AVCaptureSession.
This is the tutorial i followed for showing the camera on screen
https://github.com/messier16/FullCameraPage/blob/master/FullCameraApp.iOS/CameraPageRenderer.cs
Any advice is awesome. Thank you!
I ended up doing a while loop inside of overriden ViewWillAppear() to grab the frame consistently
I am new to iPhone. I have Develop one aplication that is of ViewBased Application.
Everything is right but while i run the application, instead of showing list of content it shows the white screen. After doing studies come to know that it may be for the XIB file references. As my code is right at all. So will u tell me while it appear like it ?
Thanks in advance.
check your .xib file and see whether you have link it to datasource and delegate or not.
Check your xib and properly check inteface builder that a datasource and delegate is set or not. for showing a view you have to set datasource and delegate..and also you have to check in appdelegate file that a object of your view controller have been made or not... i.e. you have to allocate memory of your view controller in app delegate file..
How do I prevent my GUI from redraw when it comes back from lock screen after receiving a UILocalNotification? In didReceiveLocalNotification I present a modal view, but the old state of my view controllers is shown for a moment before that. How do I prevent this?
Also the order of events I get when I come back on local notification from background is as following:
1. UIApplicationWillEnterForegroundNotification
2. UIApplicationDidBecomeActiveNotification
3. didReceiveLocalNotification
When I come from lock screen:
1. didReceiveLocalNotification
2. UIApplicationDidBecomeActiveNotification
Why is this difference and whether there is something else I'm missing?
Thanks
Here's how it was solved. May be it's not the way, but it worked for me. Since my application is voip/audio, it doesn't come to didFinishLaunchingWithOptions... I found out, that iOS uses a cached image from a previous state for animation when it resumes from background or from sleep mode. So the solution is basically to exchange this cached image with my default.png image. I do it in applicationWillResignActive delegate. There I add a modal view with a Default.png picture and dismiss it in applicationDidBecomeActive. This is really in short. Hopefully it will help somebody else with the same problem.
You can provide a custom image that is displayed when launching/resuming from a local notification. Simply set the alertLaunchImage property on your local notification to the name of the correct image.
From the Docs:
The string is a filename of an image file in the application bundle. This image is a launching image specified for a given notification; when the user taps the action button (for example, “View”) or moves the action slider, the image is used in place of the default launching image. If the value of this property is nil (the default), the system either uses the previous snapshot, uses the image identified by the UILaunchImageFile key in the application’s Info.plist file, or falls back to Default.png.
alertLaunchImage
How do I prevent my GUI from redraw when it comes back from lock screen after receiving a UILocalNotification? In didReceiveLocalNotification I present a modal view, but the old state of my view controllers is shown for a moment before that. How do I prevent this?
Also the order of events I get when I come back on local notification from background is as following:
1. UIApplicationWillEnterForegroundNotification
2. UIApplicationDidBecomeActiveNotification
3. didReceiveLocalNotification
When I come from lock screen:
1. didReceiveLocalNotification
2. UIApplicationDidBecomeActiveNotification
Why is this difference and whether there is something else I'm missing?
Thanks
Here's how it was solved. May be it's not the way, but it worked for me. Since my application is voip/audio, it doesn't come to didFinishLaunchingWithOptions... I found out, that iOS uses a cached image from a previous state for animation when it resumes from background or from sleep mode. So the solution is basically to exchange this cached image with my default.png image. I do it in applicationWillResignActive delegate. There I add a modal view with a Default.png picture and dismiss it in applicationDidBecomeActive. This is really in short. Hopefully it will help somebody else with the same problem.
You can provide a custom image that is displayed when launching/resuming from a local notification. Simply set the alertLaunchImage property on your local notification to the name of the correct image.
From the Docs:
The string is a filename of an image file in the application bundle. This image is a launching image specified for a given notification; when the user taps the action button (for example, “View”) or moves the action slider, the image is used in place of the default launching image. If the value of this property is nil (the default), the system either uses the previous snapshot, uses the image identified by the UILaunchImageFile key in the application’s Info.plist file, or falls back to Default.png.
alertLaunchImage
How can I obtain the Window Rect of a CDialog which is based on a dialog template. The dialog is not and can not be visible
It might be tricky with CDialog, because if you dont show the CDialog, the window handle is not created and you cant call GetClientRect.
Might i suggest calling CreateDialogIndirect instead to create the dialog, then you can get the client rect. You dont need to show the dialog. I think as long as the window handle is created, the GetClientRect should work. I am not an expert though and its been many years since i have written MFC code.
Well...
In Windows API-land, you could load the resource yourself (FindResourceEx, LoadResource), understand the binary structure of the dialog template resource (some clues at http://blogs.msdn.com/oldnewthing/archive/2004/06/22/162360.aspx), convert the size of the dialog in the dialog template from dialog units to pixels (check out http://msdn.microsoft.com/en-us/library/ms645475(VS.85).aspx).
I'd be curious why you'd want to do this, though.