Touch Id External Keyboard
Touch ID on your MacBook lets you quickly unlock your Mac, make purchases, authenticate system dialogs, and more. But it doesn't work when your Mac is closed and you're using an external display and keyboard. But in just a few steps with a Yubikey, you can be back to one-tap authentication. Apple's fourth-generation iPad Air is finally here after being announced at Apple's September event, with the massive overhaul of the Air including a ton of changes. We take Touch ID and other. Replacing the function keys in the top row of the keyboard, the Touch Bar features a Retina-quality display and supports multi-touch input. The power button contains the Touch ID sensor, so you can quickly log into your MacBook Pro using your fingerprint. You can also use Touch ID to make purchases over the web, thanks to Apple Pay.
-->This section explains the tasks associated with getting Windows Touch input to function in your application.
The following steps are typically performed when working with Windows Touch messages:
- Test the capabilities of the input digitizer.
- Register to receive Windows Touch messages.
- Handle the messages.
The message used for Windows Touch is WM_TOUCH. This message indicates the various states of contact with a digitizer.
Testing the Capabilities of the Input Digitizer
The GetSystemMetrics function can be used to query the capabilities of the input digitizer by passing in the nIndex value of SM_DIGITIZER. GetSystemMetrics returns a bit field that indicates whether the device is ready, whether the device supports pen or touch, whether the input device is integrated or external, and whether the device supports multiple inputs (Windows Touch). The following table shows the bits for the various fields.
| Bit | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 |
|---|---|---|---|---|---|---|---|---|
| Value | Stack Ready | Multi-input | Reserved | Reserved | External Pen | Integrated Pen | External Touch | Integrated Touch |
To test the result from the command for a particular feature, you can use the bitwise & operator and the particular bit you are testing. For example, to test for Windows Touch, you would test that the seventh-order bit is set (0x40 in hex). The following code example shows how these values could be tested.
The following table lists the constants defined in windows.h for testing touch capabilities of the input digitizer.
| Name | Value | Description |
|---|---|---|
| TABLET_CONFIG_NONE | 0x00000000 | The input digitizer does not have touch capabilities. |
| NID_INTEGRATED_TOUCH | 0x00000001 | An integrated touch digitizer is used for input. |
| NID_EXTERNAL_TOUCH | 0x00000002 | An external touch digitizer is used for input. |
| NID_INTEGRATED_PEN | 0x00000004 | An integrated pen digitizer is used for input. |
| NID_EXTERNAL_PEN | 0x00000008 | An external pen digitizer is used for input. |
| NID_MULTI_INPUT | 0x00000040 | An input digitizer with support for multiple inputs is used for input. |
| NID_READY | 0x00000080 | The input digitizer is ready for input. If this value is unset, it may mean that the tablet service is stopped, the digitizer is not supported, or digitizer drivers have not been installed. |
Checking the NID_* values is a useful way of checking the capabilities of a user's computer to configure your application for touch, pen, or non-tablet input. For example, if you have a dynamic user interface (UI) and want to automatically configure some of it, you could check for NID_INTEGRATED_TOUCH, NID_MULTITOUCH, and could get the maximum number of touches the first time that a user runs your application.
Note
There are some inherent limitations for SM_GETSYSTEMMETRICS. For example, there is no support for plug and play. For this reason, use caution when using this function as a means for permanent configuration.
Registering to Receive Windows Touch Input
Before receiving Windows Touch input, applications must first register to receive Windows Touch input. By registering the application window, the application indicates that it is touch compatible. After the application registers its window, notifications from the Windows Touch driver are forwarded to the application when input is made on the window. When the application shuts down, it unregisters its window to disable notifications.
Note
WM_TOUCH messages are currently 'greedy.' After the first touch message is received on a window, all touch messages are sent to that window until another window receives focus.
Note
By default, you receive WM_GESTURE messages instead of WM_TOUCH messages. If you call RegisterTouchWindow, you will stop receiving WM_GESTURE messages.
The following code demonstrates how an application could register to receive Windows Touch messages in a Win32 application.
Handling Windows Touch Messages
You can handle the Windows Touch messages from applications in Windows operating systems in many ways. If you are programming a GUI application, you add code within the WndProc function to handle the messages of interest. If you are programming a Microsoft Foundation Class (MFC) or managed application, you add handlers for the messages of interest. The following code example shows how touch messages could be handled from WndProc in a Windows-based application.
The following code shows how you can implement the message map and a message handler. Note that the messages must be declared in the message map and then the handler for the message should be implemented. For example, in an MFC application, this could be declared in the dialog code. Note also, that the OnInitDialog function for your dialog window would have to include a call to RegisterTouchWindow such as RegisterTouchWindow(m_hWnd, 0).
Touching the window will indicate touches from a pop-up window.
Related topics
A leaker has posted what are purported to be images of an as-yet unreleased iPad Air manual, which show a larger display, and Touch ID relegated to to the sleep/wake power button.
Backing up previous reports that the forthcoming 'iPad Air 4' will have an 11-inch display and use USB-C, a new leak claims to have images from Apple's documentation. The four shots show pages from what appears to be a Spanish-language iPad Air Manual.
Touch Id External Keyboard Software
iPad Air 4
Touch ID
via pic.twitter.com/2jc09uAKUY
The illustrations in the manual suggest that the display will be close to edge-to-edge. They show with graphics how this iPad Air will not have a Home button and instead will need the same swiping gestures as a Face ID device.
However, the Spanish captions also directly refer to 'Touch ID with the top button to unlock the iPad Air.' Leaker DuanRui also confirms that in the Twitter thread that follows the post.
DuanRui does not have a particularly long or strong track record in leaking Apple information. However, a recent DuanRui posting claiming that Apple's 'iPhone 12' could come with a braided Lightning cable appear to have been backed up by the better-known leaker @L0vetodream.
Keyboard Keys Id
The existence of forthcoming iPads has most recently been confirmed by Apple's listing model numbers on the EEC database.
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