I don't have much experience with this type of stuff so I wanted to get some feedback on what I should be looking into.
Here is the situation: I have a joystick (Thrustmaster T-Flight Hotas X) that has about 12 buttons. What I would like to do is be able to hold 1 of the buttons and use it as a mod key so that I could double the number of buttons I have (I would effectively have 22 buttons).
Now what is the best way to go about this? I am currently running Ubuntu 13.10. I believe the device is picked up by the usbhid driver. Now should I be trying to write a custom driver that would yield this behavior or is there a better/less complicated way of going about this - i.e. intercepting the events and modifying them on the fly - or something else I don't even know is possible.
Anyways hope I was clear. Just trying to figure out the best course of action here.
Thanks in advance.
I would just try to use the existing Linux joystick API
https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/tree/Documentation/input/joystick-api.txt?id=refs/tags/v3.9.6
then is user space you can get all the joystick events, and process them as you see fit. Specifically you can get button press events and use logic as follows:
void handle_button_y_press()
{
if (button_X_pressed)
{
do_y_function_a();
}
else
{
do_y_function_b();
}
}
Related
As you all know Coded ui playback can be kind of slow depending on the controls you're querying.
To try and solve this issue I am looking at adding some multithreading capabilities to the test.
Here is a for loop which works successfully, now converted to a Parallel.For - only the control cannot be found (not at all).
Parallel.For(0, totalItems, (i, loopState) =>
{
DxLookup.OpenPopup();
var cell = _popupGrid.GetCell(viewName, column.ColumnName, i);
cell.DrawHighlight();
if (cell.ValueAsString == item)
{
found = true;
loopState.Stop();
}
});
The code fails on the DxLookup.OpenPopup - because the control is not found. Looks like it could be thread related.
How is it possible to access a test control from another thread then?
I am not too sure about Coded UI playback supports multi-threading capabilities check this link for playback related information
Configure Playback
you may try come other techniques to speedup the playback
what kind of app are you trying to test? if it's a winforms app multithrreading is problematic.
try testing wheter you can locate tha main app window or any kind of control. if not you'll know it's a threading problem. if you can locate any kind of control just not the desired control you'll be able to tweak the search configurations to loacte the control.
hope this helps
I know there has been a few of these, but a lot of the answers always to have a lot of buts, ifs, and you shouldn't do that.
What I'm trying to do is have a background program that can monitor the keyboard events from X11. This is on an embedded device, and it will have a main app basically running in something like a kiosk mode. We want to have a background app that manages a few things, and probably a back doors hook. But this app generally will not have focus.
I can't use the main app, because its partially there for a fail safe if the main app ever fails, or to do some dev type things to bypass the main app.
The best question I found is a few years old, so I'm not sure how up to date it is. This was extremely easy to do with windows.
X KeyPress/Release events capturing irrespective of Window in focus
The correct way for doing that is using Xlib. Using this library you can write code like this:
while (1) {
XNextEvent(display, &report);
switch (report.type) {
case KeyPress:
if (XLookupKeysym(&report.xkey, 0) == XK_space) {
fprintf (stdout, "The space bar was pressed.\n");
}
break;
}
}
// This event loop is rather simple. It only checks for an expose event.
// XNextEvent waits for an event to occur. You can use other methods to get events,
// which are documented in the manual page for XNextEvent.
// Now you will learn how to check if an event is a certain key being pressed.
// The first step is to put case KeyPress: in your switch for report.type.
// Place it in a similar manner as case Expose.
Also you could use poll or select on the special device file that is mapped to your keyboard. In my case is /dev/input/event1.
If you have doubts about what's the special file mapped to your keyborad, read the file /var/log/Xorg.0.log (search for the word keyboard).
Here you have another link of interest: Linux keyboard event capturing /dev/inputX
is it possible to detect vibration on the iPhone? I'm trying to figure out how to detect when the user smacks a desk or table when the phone is sitting on it. I remember reading somewhere you could detect a smack on a wooden table using the mic and AVFoundation. Any ideas?
Thanks
if you go down the microphone route, something like this might do the trick:
//somewhere during setup call this line
[anAVAudioRecorder setMeteringEnabled:YES];
//then in a method used to poll the audioMeter
[anAVAudioRecorder updateMeters];
averagePower = [anAVAudioRecorder averagePowerForChannel:0];
if (averagePower > threshold ) {
[musicPlayerClass play];
}
I'm working on a online quiz client where we use a dedicated custom-made linux distro which contains only the quiz client software along with text editors and other utility software. When the user has started the quiz, I want to prevent him/her from minimizing the window/closing it/switching to the desktop or other windows. The quizzes can be attempted using only the mouse, so I need the keyboard to be completed disabled for the period of the quiz. How could I do this, using Qt or Mono? I'm ready to use any low-level libraries/drivers, if required.
You may use QWidget::grabKeyboard and QWidget::grabMouse, and please note the warning in comments:
Warning: Bugs in mouse-grabbing
applications very often lock the
terminal. Use this function with
extreme caution, and consider using
the -nograb command line option while
debugging.
Have you looked at XGrabKeyboard? That should do a global grab of the keyboard.
Did you try to use EventFilter ? You have the opportunity to block all the events related to, as instance, keypress...
More information here : http://qt.nokia.com/doc/4.6/eventsandfilters.html
Hope it helps !
Something like :
bool MyWidget::event(QEvent *event)
{
if (event->type() == QEvent::KeyPress)
{
return true;
}
return QWidget::event(event);
}
I've embedded an nsIWebBrowser in my application. Because I'm just generating HTML for it on the fly, I'm using OpenStream, AppendToStream, and CloseStream to add content. What I need is to add event listeners for mouse movement over the web browser as well as mouse clicks. I've read documentation and tried lots of different things, but nothing I have tried has worked. For instance, the code below would seem to do the right thing, but it does nothing:
nsCOMPtr<nsIDOMWindow> domWindow;
mWebBrowser->GetContentDOMWindow(getter_AddRefs(domWindow));
if (!mEventTarget) {
mEventTarget = do_QueryInterface(domWindow);
if (mEventTarget)
mEventTarget->AddEventListener(NS_LITERAL_STRING("mouseover"), (nsIDOMEventListener *)mEventListener, PR_FALSE);
}
Perhaps it isn't working because this is run during initialization, but before any content is actually added. However, if I add it during AppendStream, or CloseStream, it segfaults.
Please tell me a straightforward way to do this.
Well, here's the answer:
nsCOMPtr<nsIDOMEventTarget> cpEventTarget;
nsCOMPtr<nsIDOMWindow> cpDomWin;
m_pWebBrowser->GetContentDOMWindow (getter_AddRefs(cpDomWin));
nsCOMPtr<nsIDOMWindow2> cpDomWin2 (do_QueryInterface (cpDomWin));
cpDomWin2->GetWindowRoot(getter_AddRefs(cpEventTarget));
rv = cpEventTarget->AddEventListener(NS_LITERAL_STRING("mousedown"),
m_pBrowserImpl, PR_FALSE);