In my Document based application, no less than three documents are opened when I run the app, yet only one window displays. When I save&quit, it saves another document than the one that belongs to the window.
How can this happen? In particular, I do not want multiple instances of NSDocument, how can I avoid this at startup?
I found that this has to do with the way that the app was set up in the Interface Builder. The code did not cause this behavior.
So, if seemingly random documents are opening up when starting a doc-based application, remember to also check you xib settings in IB!
Related
I'm doing an automation script for installation wizards using AutoIt. I'm trying to handle window changes in some way.
Can some one explain how these GUI's work?
When I click on the Next button it looks just like the components in the GUI is beeing changed. Is this tha case? Or is a new window created and the old destroyed?
I've noticed that the process ID is the same for all windows.
I'm sure there is some way to know which "state" the GUI is in, or which step?
By the way. All the windows has the same title.
Thanks
/Anders
This will be dependant on the program you are automating.
The easiest approach would be to look at what changes in the GUI between stages, likely candidates are if there is a label that is giving instructions for that step, or a button that has text changing (e.g. if the button says "Finish" then you know your at the end).
Most installer programs have child windows for grouping the controls of each stage. These are typically implemented as dialog resources (as can be seen when using something like reshacker on them). So although the window remains the same, the panels are being created/destroyed as appropriate. This is a very neat method of doing it, for the obvious reason that you don't need to have to code to create/destroy a lot of controls. Resource created dialogs don't have nice class names like windows sometimes do though, so this may not be a reliable way to check the state.
I don't know what their official name is, but I mean these things:
Is there an official API for creating those in my own program?
And related question: Did you ever see these "split menu items" used anywhere other than the start menu? Where? This could point at an API.
Glancing at my own start menu, I'm guessing that most are generated the same way "Recent Documents" used to be done. i.e., observing the files that programs open.
As for new APIs, this page might be a good place to start sniffing around: http://msdn.microsoft.com/en-us/library/ee461765%28VS.85%29.aspx
To create tasks like internet explorer etc, use ICustomDestinationList->AddUserTasks(), the recent items should show up for file types you are registered to handle (They are added by the open/save dialog or manually by calling SHAddToRecentDocs())
The Qt documentation for QWidget::activateWindow() states:
On Windows, if you are calling this
when the application is not currently
the active one then it will not make
it the active window. It will change
the color of the taskbar entry to
indicate that the window has changed
in some way. This is because Microsoft
does not allow an application to
interrupt what the user is currently
doing in another application.
However, Skype appears to defy this rule. If Skype is running but is not the active application, I can launch it from the start menu and it brings the existing instance to the foreground, activates it and grabs input focus.
And how can I do this?
(NOTE: This is specific to how QtSingleApplication works)
The solution is stupidly simple for my issue. Simply call AllowSetForegroundWindow(ASF_ANY); at the beginning of the application, and the original process will thus be allowed to bring itself to the foreground by use of SetForegroundWindow(). No strange hacks, just one line of code to add and no need to modify QtSingleApplication either.
I don't think you can do it reliably with the Qt API alone.
There are multiple solutions for windows. E.g. here, and here, and here.
The method I've used before is to declare a shared memory section, and write the application's window handle there. Later, when a second instance of your program is started, you can find the window handle of the first and activate it.
I don't think you have the issue of windows preventing you from doing this in this case, because your second instance is the active application, so it is allowed to 'pass focus' to other windows.
Use Single Application in Qt Solutions
For some applications it is useful or
even critical that they are started
only once by any user. Future attempts
to start the application should
activate any already running instance,
and possibly perform requested
actions, e.g. loading a file, in that
instance.
you can set the setWindowOpacity from 0 to 1 .the only thing is you may open it all the time
We've got several web-based applications that are launched from our ERP system (SAP R/3 in this case, but since we're using ShellExec, I don't consider this a SAP issue). The problem is that we can either set the IE to "open every URL passed from the ERP system in a new window" or to "reuse any one of the existing IE windows" (same problem with tabs). Both settings are not acceptable for our users: one of the web applications is a rather bulky medical image viewer applet that wreaks havoc if invoked multiple times. The other option is a no-go either because this way opening the image browser for a patient automatically displaces the lab result display for the very same patient and vice versa.
I'd like to have some control over which window may or may not be reused. My idea would be a kind of "window tag" and a helper program that checks if a window with that tag exists - if it does, reuse it, if not create it. So basically
IELauncher SEARCH http://www.google.com
would open a new window and tag it as SEARCH.
IELauncher DEVEL http://stackoverflow.com
would open a second window, tagging it as DEVEL. Then
IELauncher SEARCH http://www.wikipedia.org
would replace the contents of the first (google) window only.
Is this possible at all? Do you have any pointers for me where to start? I don't even know what to look for...
I had to resort to some rather ugly methods - dynamically assembling a HTML page that uses JavaScript and window.open() to open and access a window by name, then close the page executing the JavaScript. Ugly, but at least this way you get the additional benefit of being able to control certain aspects of the browser window like switching of the menu bar, toolbar and location bar.
This is a very general question:
I was wondering whether it is possible to find out whether an application (any kind of application no matter if it a delphi-application or java or whatever) was started by a user or by another application? And if it is possible and I see that an application was called by another one, can I find out what the "father" application is, that called the new programm?
Thnx in advance!
EDIT: Maybe it is too general - How can I see whether a Delphi application has a parent application with Delphi itself, e.g. one application was started by a service and I need to find that service?
Every single running application has a parent application, which launched it (except for root system process).
It is not possible to tell, whenever it is user who directly clicked on application to lauch it or not.
Example: take Explorer shell (not Internet Explorer).
You can double click on any application to launch it. The parent process will be explorer.exe.
You can right-click on any file and a bunch of context menu extenders will load. Some of them may launch external applications to, say, create a preview of video-file (I saw this, swear!). The parent process will be explorer.exe, but user didn't indended to lauch any application. He just wants to view file's properties. He didn't even know, that applications were lauched!
Example: take Total Commander or any other two-panel file managers, which supports plugins for archives.
You can double click on any
application to launch it. The parent
process will be totalcmd.exe.
You may enter archive file and copy
(extract) few files from it to your
Documents folders. Corresponding
plugin may handle extraction by
itself or run invisible process to
handle all work. All you see is
progress bar in Total Commander. But
there is a new proces and its parent
is totalcmd.exe again.
There are no differences between cases 1 and 2 in both examples.
BTW, the definition "started by user" is unclear. You even may say that nothing can happen without user's command. All those background processes in cases #2 were launched because user asked for it. Well, user didn't asked for lauch explicitly, but he asked for operation itself.
You don't mention if you want to do this programmatically or if you're looking for a tool to just show the information.
If you just want to view the information, you can use Process Monitor, part of SysInternals:
http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx
In the Tools menu, there is a 'Process Tree' view that shows you a tree with parent / child process relationships and as well as the owner of each process.
If you want even more detail about processes, look at Process Explorer:
http://technet.microsoft.com/en-us/sysinternals/bb896653.aspx
if it started by the user from windows so the parent will be explorer.exe, otherwise the parent will be the application which run the process.
to check the parent of a process by using tool check Ander Miller reply.
Did you see this question?
I'm not sure that I see problem right now.