feat(ui): Add disabled pointer icon for non-selectable items

Author: Jankin-Wu

composeApp/src/androidMain/kotlin/com/jankinwu/fntv/client/utils/PointerUtils.android.kt

@@ -3,3 +3,4 @@ package com.jankinwu.fntv.client.utils
 import androidx.compose.ui.input.pointer.PointerIcon
 
 actual val HiddenPointerIcon: PointerIcon = PointerIcon.Default
+actual val DisabledPointerIcon: PointerIcon = PointerIcon.Default

composeApp/src/commonMain/kotlin/com/jankinwu/fntv/client/ui/component/common/FileTreePicker.kt

@@ -42,6 +42,7 @@ import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.jankinwu.fntv.client.data.network.impl.FnOfficialApiImpl
 import com.jankinwu.fntv.client.ui.component.common.DirectoryContentFetcher.fetchDirectoryContents
+import com.jankinwu.fntv.client.utils.DisabledPointerIcon
 import com.jankinwu.fntv.client.ui.customSelectedCheckBoxColors
 import fntv_client_multiplatform.composeapp.generated.resources.Res
 import fntv_client_multiplatform.composeapp.generated.resources.empty_folder
@@ -551,7 +552,7 @@ private fun FileNodeItem(
                         CheckBoxDefaults.defaultCheckBoxColors()
                     },
                     modifier = Modifier
-                        .pointerHoverIcon(if (isSelectable) PointerIcon.Hand else PointerIcon.Default)
+                        .pointerHoverIcon(if (isSelectable) PointerIcon.Hand else DisabledPointerIcon)
                         .size(15.dp)
                 )
             }

composeApp/src/commonMain/kotlin/com/jankinwu/fntv/client/utils/PointerUtils.kt

@@ -3,3 +3,4 @@ package com.jankinwu.fntv.client.utils
 import androidx.compose.ui.input.pointer.PointerIcon
 
 expect val HiddenPointerIcon: PointerIcon
+expect val DisabledPointerIcon: PointerIcon

composeApp/src/jvmMain/kotlin/com/jankinwu/fntv/client/utils/PointerUtils.jvm.kt

@@ -1,7 +1,10 @@
 package com.jankinwu.fntv.client.utils
 
 import androidx.compose.ui.input.pointer.PointerIcon
+import java.awt.BasicStroke
+import java.awt.Color
 import java.awt.Point
+import java.awt.RenderingHints
 import java.awt.Toolkit
 import java.awt.image.BufferedImage
 
@@ -12,3 +15,29 @@ actual val HiddenPointerIcon: PointerIcon = PointerIcon(
         "Hidden"
     )
 )
+
+actual val DisabledPointerIcon: PointerIcon = PointerIcon(
+    Toolkit.getDefaultToolkit().createCustomCursor(
+        run {
+            val size = 32
+            val image = BufferedImage(size, size, BufferedImage.TYPE_INT_ARGB)
+            val g = image.createGraphics()
+            g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON)
+
+            // Draw forbidden icon (red circle with slash)
+            g.color = Color.RED
+            g.stroke = BasicStroke(2f)
+            val padding = 7
+            g.drawOval(padding, padding, size - 2 * padding, size - 2 * padding)
+
+            val innerPadding = 10
+            // Diagonal line from top-left to bottom-right
+            g.drawLine(innerPadding, innerPadding, size - innerPadding, size - innerPadding)
+
+            g.dispose()
+            image
+        },
+        Point(16, 16),
+        "Disabled"
+    )
+)