The latest version of KeyUp is 6.0 on Mac Informer. It is a perfect match for the System Tools category. The app is developed by Irradiated Software and its user rating is 5 out of 5. Input focuses for GraphicsWindow.KeyDown and GraphicsWindow.KeyUp event handlers can be lost when there is a text box control in local but the input focus can be rounded among controls including key event handlers by pushing tab key in remote. GraphicsWindow.LastKey becomes 'LeftShift' or 'RightShift' for Shift key in local but 'Shift' in remote. Depends on #439 It would be nice to create pseudo events on keys. So keyup and keydown would further be extended with: space, enter, shift.enter, keya, and so on. It would need to understand, named keys, letters, modifiers. Uni-app 全局按键事件监听。 支持App端和H5端,一般用于监听硬件设备(键盘、扫描枪)按键事件。.
< WebAPI | BrowserAPI
Dispatch KeyboardEvent across BrowserElements
This is a proposal to enable applications to handle/override the behavior of certain KeyboardEvent. For implementation, see bug 989198.
There are four scenarios which should be fulfilled:
Note that some keys could be either SYSTEM-FIRST or APP-FIRST. The behavior is decided by the author of applications. Proposal Concept
Four new events are proposed:
When a key is pressed down, the event sequence would be:
Similarly, when a key is released, the event sequence would be:
Nested mozbrowser iframes case
This proposal can be extended to nested mozbrowser iframes. The four new events will be dispatched to all mozbrowser-embedder iframes.
How to Fulfill Scenarios?
https://ftabju.weebly.com/blog/best-calendar-app-that-works-with-mac. Here are some examples for each scenario.
Let's define some functions first.
Scenario SYSTEM-ONLY
Scenario SYSTEM-FIRST
Scenario APP-CANCELLED
Scenario APP-FIRST
Proposal Detailsmozbrowserbeforekeydown
keydown
mozbrowserafterkeydown
mozbrowserbeforekeyup
keyup
mozbrowserafterkeyup
Related Gaia ChangesCurrent Implementation
Currently, shell.js filters all hardware key event and wraps them in mozChromeEvent and then dispatch to Gaia System app. In Gaia System app, hardware_buttons.js listens for these low-level `mozChromeEvents`, processes them and generates higher-level events to handle autorepeat on the volume key long presses on Home and Sleep, and the Home+Sleep key combination. Other system app modules should listen for the high-level button events generated by this module.
Mac Keydown Keyup App Tutorial
The low level input events wrapped in mozChromeEvent are:
Hardware Buttons module (hardware_buttons.js) implements a state machine in it. Each state object has a mandatory `process()` method to process incoming low level input events and two optional `enter()` and `exit()` method when enter and exit state. Hardware Buttons module will listen to all low level input events and relay it to current state object to process. An all state transitions happen in `process()` or timer in `enter()` method.
Plan of Change
In patch of https://bugzilla.mozilla.org/show_bug.cgi?id=989198, Gina will keep both mozChromeEvents and new KeyboardEvents dispatching at the same time. But we only need to listen to one of them in Gaia.
Part 1 - Switch to new keyboard event
The state objects in hardware_buttons.js and software_button_manager.js all have dependency on low level input event names listed above.In this part, we stop listening to 'mozChromeEvent' and start listening to 'mozbrowserbeforekeydown', 'mozbrowserbeforekeyup', 'keydown', and 'keyup' event, and do a translation in handleEvent of hardware_buttons.js.
Translations are as follows:
https://ftabju.weebly.com/blog/webcam-recorder-app-mac. This translation would make sure the original finite state machine in hardware_buttons.js and software_button_manager.js works as usual. All other outer module still listens to custom events generate in hardware_buttons.js (that is, home/sleep/home+sleep/holdhome/holdsleep/wake/volumeup/volumedown). In this part, these four events need to `preventDefault()`. Because we have not implement customization yet, and we should let hardware key handling process just as the same as before.
Part 2 - Key event handling customization
What needs to be customization?
Build time customization detail will be discussed later. Default Policy in System App for 'Power', 'Exit', 'VolumeUp', 'VolumeDown':
Default Policy for other keys are APP-CANCELLED.
There is one more thing to do in this part. We only handle 'Power', 'Exit', 'VolumeUp', 'VolumDown' in part 1. But there will be more 'keys' need to be handled. We'll have to create a key mapping and handling table with customization in this part.
Part 3 - Remove all translated low-level input events
In this part, we need to refactor both hardware_buttons.js and software_button_manager.js to remove all low-level input event names. In software_button_manager.js, we should dispatch events the same as new key event (such as mozbrowserbeforekeydown or keydown..etc)
BugsMac Keydown Keyup App Shortcuts
Retrieved from 'https://wiki.mozilla.org/index.php?title=WebAPI/BrowserAPI/KeyboardEvent&oldid=1041331'
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