Add docs about desktop a11y (#1775)

tutorials/Accessibility/README.md

@@ -0,0 +1,61 @@
+# Accessibility support
+
+## Platform Support
+
+| Platform | Status                            |
+|----------|-----------------------------------|
+| MacOS    | Supported                         |
+| Windows  | Supported with Java Access Bridge |
+| Linux    | Not supported                     |
+
+## Custom widget with semantic rules
+
+```kotlin
+import androidx.compose.foundation.*
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.Text
+import androidx.compose.runtime.*
+import androidx.compose.ui.*
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.semantics.*
+import androidx.compose.ui.unit.*
+import androidx.compose.ui.window.*
+
+fun main() = singleWindowApplication(
+    title = "Custom Button", state = WindowState(size = DpSize(300.dp, 200.dp))
+) {
+    var count by remember { mutableStateOf(0) }
+
+    Box(modifier = Modifier.padding(50.dp)) {
+        Box(modifier = Modifier
+            .background(Color.LightGray)
+            .fillMaxSize()
+            .clickable { count += 1 }
+            .semantics(mergeDescendants = true /* Use text from the contents (1) */) {
+                // This is a button (2)
+                role = Role.Button
+                // Add some help text to button (3)
+                contentDescription = "Click to increment value"
+            }
+        ) {
+            val text = when (count) {
+                0 -> "Click Me!"
+                1 -> "Clicked"
+                else -> "Clicked $count times"
+            }
+            Text(text, modifier = Modifier.align(Alignment.Center), fontSize = 24.sp)
+        }
+    }
+}
+```
+
+![Custom Widget](./images/custom-widget.png)
+
+# Windows
+Accessibility on Windows is provided by Java Access Bridge and is disabled by default. To enable it, run the following command in Command Prompt.
+
+```cmd
+%JAVA_HOME%\bin\jabswitch.exe /enable
+```
+
+There are some issues with HiDPI display support on windows, see [Desktop Accessibility on Windows](Windows.md) for details.

tutorials/Accessibility/Windows.md

@@ -0,0 +1,18 @@
+# Desktop Accessibility on Windows
+
+## Enabling Java Accessibility on Windows
+Java Access Bridge is disabled by default. To enable it, run
+
+```cmd
+%JAVA_HOME%\bin\jabswitch.exe /enable
+```
+
+## HiDPI issues
+### JDK support
+HiDPI support in Access Bridge was landed in [JDK-8279227](https://bugs.openjdk.java.net/browse/JDK-8279227). As for Feb/01/2022 this feature is not included in any released JDK, OpenJDK 17.0.4 release with this feature is planned for May 2022.
+
+### NVDA workaround
+NVDA 2021.3.1 does not handle widget position properly. Until they fix it we can override DPI awareness in NVDA compatibility settings as shown:
+
+![NVDA compatibility settings](./images/nvda-compat.png)
+