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Autumn Pitz

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Aug 4, 2024, 9:09:13 PM8/4/24
to jakagepre
Iwork with C# and WPF and not using MVVM approach. One of the important part of applications is communication among Windows Pages and UserControls. In MVVM they do it behind the scenes and let you use some method to make it possible to send or receive data among different instances.

In code behind, Parent and child windows can communicate easily by just passing or assigning ParentWindow reference to ChildWindow. To make communication possible among different windows or pages. But what I've done is,


Created a Static Class named as Operator.cs that has a List AvailableWindows . Now every time we create a window, we push this instance into List AvailableWindows and when closing window remove that instance from AvailableWindows . This way I've reference to available pages or windows and from anywhere i can access it and do whatever and can communicate among many instances easily.


It really depends on what it is you are trying to accomplish by having the pages being able to reference each other. I would tend to be concerned about a separation of concerns with pages eventually being spaghetti coded together, with page A reaching over into window B which reaches over to page C which reaches back to page A, etc.


If the use cases are event-like, I would probably use the mediator pattern ( _patterns/mediator) to allow the individual pages to pub-sub to events. While this pattern is often used in MVVM as well, it doesn't rely on MVVM. You also seem similar ideas in JavaScript webapps, so it isn't technology-specific.


We have several Windows workstations which are shared by multiple users. I'm currently considering a scheme where users have their own user accounts and profiles, but they share the same Desktop and Documents folders. Our users are used to sharing things with each other by saving to the desktop, so this wouldn't require any training. My questions about this scheme are:


As far as I know, we can't simply password-protect Outlook profiles because we use Exchange in cached mode. OST files can't be password protected, and since we use cached mode even if we enabled "Always prompt for credentials" on the Exchange account, a snooping user could just hit cancel and look through cached email. When searching online, the advice to protect Exchange accounts seems to always be "use separate Windows accounts".


Since users love saving everything to their desktop and that's how they share files with each other, using separate accounts would require everyone to remember to put shared documents in special shared folders. I foresee this just causing too much friction to be worth it.


But, if I could create multiple accounts that share the same Desktop and Documents folders, users would be able to share files simply by saving them to the Desktop or Documents folders, and yet sensitive per-user data would still be stored in AppData and therefore be protected by ACLs and the Windows account passwords.


That's the technical answer. From a technical viewpoint, this can be done. Is it a good idea? No. Not really. This can be handled by giving each user their own documents and desktop like normal, but making a network share that is automatically mapped to each user on login - again, via GPO.


As info, I am doing this across multiple machines that I happen to make use of myself, so that I have a consistent experience and file availability regardless of which box I am on. I do this through the use of DropBox (the client being installed on each machine & logged into my DropBox account) by creating a desktop folder on DropBox and then redirecting each user's desktop on each machine to point at the desktop folder on DropBox's local cache. The same thing could be done with the Documents folder as well, I believe, but haven't gone there as I too LOVE to save everything to my desktop... ;)


Drop box is reasonably secure with data-at-rest (stored encrypted on Amazon's S3 servers, iirc) and data-in-motion (encrypted on the fly), so I think that any concerns regarding security may be mitigated for most reasonable implementations.


I have two profiles on the same Windows 10 computer, both with admin privileges, and I've "moved" the Documents and Desktop folders to the same location on the same drive (right-click on the folder and go to Properties > Location to move it, after setting up a folder with the same name in the new location). On top of that, I use Sync.com (like Dropbox but zero-knowledge vis--vis the provider) to sync that same drive to two other computers, where the Documents and Desktop folders are set up in the same way. In other words, I have the same Documents and Desktop folder (and entire documents drive) on three computers and four profiles.


It might not be feasible to have different profiles with admin privileges on the same computer if you only want those two folders shared, as the admins could access everything else too. That's where the Dropbox (or Sync.com) idea comes in. Just move the folders into your Dropbox or Sync folder.


The simple way of doing this is by creating a domain with a domain controller, and having these machines all be members of the domain. Based on your existing security model, however, I think separating accounts by using a domain is far beyond the scope of security you wish to achieve.


The basic way of sharing documents amongst multiple user accounts is the "All Users" profile. It is geared specifically for that. Anything in this profile appears to everyone who logs into the machine.


In application I create some instances of the same form (all windows attributes besides handle are the same) and work with them independently. During session form changes own title depending on context, I need to wait title changing after certain operations in form.


These keyboard shortcut have saved me tons of time over the years, and I find it surprising that such a popular desktop environment like Cinnamon doesn't implement them by default. I have my file manager always open as the first window, my terminal window as #2, IDE as #3, browser as #4.


Assigning manually Win+1/2/3/etc. is a non-starter, because it will always launch a new instance of the app. Some apps might have a "one instance only" option, but that's the exception, and even then, you'll see the flicker of the new instance being launched and then killed.


What you are asking is in fact possible with a simple hack. In my case, I wanted to bind Super+2 to "either switch to emacs if possible, otherwise open it". To get this working in Cinnamon, first sudo apt install wmctrl (or whatever other method to install packages on your Linux distro), then, with emacs (or whatever application you want to bind) open, do wmctrl -x -l to get a list of your current open windows: I got


Note the reason that we needed to put it in a shell script instead of just typing the wmctrl command directly into the custom command is because the operator doesn't seem to work correctly when passed directly to the keyboard shortcut.


Update: It seems that as of cinnamon version 4.2.4-1 (and possibly earlier), this Super+number "open or switch to" feature is builtin to Cinnamon, and works out of the box without needing the hack above. However, as of September 2019, only rolling distros like Arch have cinnamon versions this new; with Mint, Ubuntu, and Debian, you still need to use the hack above (as of Sept 2019), until cinnamon version numbers for those roll forward enough.


Since it's enabled by default, it can be disabled (and enabled again) from System Settings > Applets > Grouped Window List [Configure, i.e. the little gear icon] > General > Enable Super+ shortcut to switch/open apps.


The site is secure.

The ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.


Conclusions: ICU rooms with windows or natural views do not improve outcomes or reduce costs of in-hospital care for general populations of medical and surgical ICU patients. Future work is needed to determine whether targeting light from windows directly toward patients influences outcomes and to explore these effects in patients at high risk for adverse outcomes.


See Accumulating-Text in the Emacs manual for details. Note these commands prompt for the target buffer. If you do this a lot with two windows open you could define your own command to look for the other visible buffer and call append-to-buffer with that.


You may want to tweak the macro to leave the cursor in the other buffer or to move it in a certain way. The point is that you record whatever repetitive action you want, then press a single key to perform it again.


One indirect approach came to my mind. This can be done using ediff-buffers. When we run this command, it puts 2 buffers in vertically split windows. Then, using n and p keys, you can go to the next and previous difference. Then, by pressing a or b, you can copy-paste difference from one buffer to the other.


The problem is, during the startup, my script (Activate_Appz) is launched among many applications, and if i want my script running, i have to click anywhere on the Activate_Appz window to select it, then everything goes fine.


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