Flat review allows an Orca user to get an idea of the on-screen layout of a window by moving from top to bottom, or vise versa. Orca also uses these coordinates to visually highlight on-screen contents when its flat review feature is used. As mentioned above, Orca can move the mouse cursor to the current on-screen coordinates of any widget.
![mouse coordinates in qt mouse coordinates in qt](https://i.stack.imgur.com/VHVh6.jpg)
The accessibility APIs allow for retrieving of these coordinates relative to the current window, and the whole screen. The registry also tracks the current on-screen position of windows/frames, and widgets. One of the key components of the accessibility registry, is to track currently running applications, their widgets, and the current state of those widgets.
MOUSE COORDINATES IN QT WINDOWS
On-screen position of windows and widgets As explained above, touch event support is not yet implemented in the registry daemon, however this is a desirable feature, given our target platforms. There have been discussions between accessibility stack maintainers and wayland devs to resolve this issue, but a concensus has not yet been reached. The long term plan is to have the registry listen for all keyboar dand mouse events to allow assistive technologies to act on them if desired, and in the case of keyboard events, swallow and act on key presses, such that the end-user application doesn't even see them. Due to deficiencies in the X input API as per the above, Qt also does the same thing as Gtk, to make sure assistive technologies can process keyboard and mouse events. Otherwise, the assistive technology signals that it doesn't intend to act on the key presses, thereby allowing the registry to signal GTK to pass the key presses through to the application. If the key presses are something the assistive technology wants to act on, it does so, and effectively swallows the key presses associated with its action. If an assistive technology such as Orca is registered with the registry daemon, the registry daemon sends these key events to the assistive technology, so that it can act on them if required.
![mouse coordinates in qt mouse coordinates in qt](https://ddgobkiprc33d.cloudfront.net/7b50e5e9-c407-43a4-8ee6-ca5b8bcbe132.png)
GTK detects the key presses by the user, and before doing anything with them, sends them over to the registry daemon for processing. Taking GTk as an example, GTK has methods to snoop for keyboard activity. As a result, keyboard events are retrieved via the toolkit of the currently focused application. In the early days, the XEVIE X extension was going to be used to deal with keyboard events, but this never eventuated due to various bugs, and XEVI was eventually dropped. For example, if you use Orca's mouse click command on a toolbar button, the mouse cursor will be moved to the on screen position of that particular toolbar button.Īt the moment, keyboard events are managed quite differently, due to the lack of a deacent API from X to subscribe to them. Assistive technologies can also request that the mouse cursor be moved to a particular on screen location. For example, the Orca screen reader allows the widget under the mouse cursor to be described as the mouse is moved. The mouse events are used by assistive technologies to track the position of the mouse, so they can take action based on the mouse location. Mouse events are received by use of the X input framework. Keyboard and mouse events are both dealt with differently, as explained below. Upstream doesn't currently appear to have any plans to add support for touch events. At this point the registry daemon only deals with keyboard and mouse events. One key task performed by the at-spi registry daemon is to deal with input events, and allow assistive technologies to act on them if required. Given the cross-platform nature of Qt, the accessibility framework has multiple backends depending on the OS, so on Linux its at-spi, Windows is IAccessible2, etc. Like Gtk, Qt has its own internal system for tracking accessibility information for on-screen widgets called QAccessible.
MOUSE COORDINATES IN QT CODE
With regards to Qt, it contains its own code to communicate via dbus with the registry, so in the generic examples given in that post, you can replace atk/Gtk with Qt. A good explanation of how the pieces fit together can be found in blog post, although only some of the post is aplicable here, since its about accessibility in WebKit GTK. The stack is made up of several pieces, some of which only apply to GNOME.
![mouse coordinates in qt mouse coordinates in qt](https://i.stack.imgur.com/EbaXH.png)
MOUSE COORDINATES IN QT FREE
The free desktop accessibility stack has been designed to be as desktop environment agnostic as possible. The below function will find the absolute position of the mouse area.Īnd then you can add mouseX and mouseY accordingly to get mouse position.This is a document outlining the Linux Desktop accessibility stack, known as at-spi, a little on how it works, and its low level requirements for input and determining on-screen position of widgets and windows.
![mouse coordinates in qt mouse coordinates in qt](https://i.stack.imgur.com/WVvQT.png)
You probably found the answer already, but I'll put my solution here for others looking for the same thing.