Add mouse move demo to imageviewer.

examples/imageviewer/common/src/androidMain/kotlin/example/imageviewer/view/ActualAndroid.kt

@@ -0,0 +1,10 @@
+package example.imageviewer.view
+
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+
+actual fun Modifier.maybePointerMoveFilter(
+    onEnter: () -> Boolean,
+    onExit: () -> Boolean,
+    onMove: (Offset) -> Boolean
+): Modifier = this

examples/imageviewer/common/src/commonMain/kotlin/example/imageviewer/view/Draggable.kt

@@ -105,4 +105,4 @@ class Point {
         this.x = x
         this.y = y
     }
-}
+}

examples/imageviewer/common/src/commonMain/kotlin/example/imageviewer/view/PointerMoveFilter.kt

@@ -0,0 +1,10 @@
+package example.imageviewer.view
+
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+
+expect fun Modifier.maybePointerMoveFilter(
+    onEnter: () -> Boolean = { true },
+    onExit: () -> Boolean = { true },
+    onMove: (Offset) -> Boolean = { true }
+): Modifier

examples/imageviewer/common/src/desktopMain/kotlin/example/imageviewer/view/ActualDesktop.kt

@@ -0,0 +1,11 @@
+package example.imageviewer.view
+
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.geometry.Offset
+import androidx.compose.ui.input.pointer.pointerMoveFilter
+
+actual fun Modifier.maybePointerMoveFilter(
+    onEnter: () -> Boolean,
+    onExit: () -> Boolean,
+    onMove: (Offset) -> Boolean
+): Modifier = this.pointerMoveFilter(onEnter = onEnter, onExit = onExit, onMove = onMove)

examples/imageviewer/common/src/desktopMain/kotlin/example/imageviewer/view/MainScreen.kt

@@ -15,22 +15,18 @@
  */
 package example.imageviewer.view
 
+import androidx.compose.foundation.*
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.graphics.RectangleShape
 import androidx.compose.ui.graphics.asImageAsset
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.layout.ContentScale
-import androidx.compose.foundation.clickable
 import androidx.compose.foundation.shape.CircleShape
-import androidx.compose.foundation.ScrollableColumn
-import androidx.compose.foundation.Text
-import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.Stack
-import androidx.compose.foundation.Box
 import androidx.compose.foundation.layout.preferredHeight
 import androidx.compose.foundation.layout.preferredWidth
 import androidx.compose.foundation.layout.preferredSize
@@ -44,6 +40,10 @@ import androidx.compose.material.MaterialTheme
 import androidx.compose.material.TopAppBar
 import androidx.compose.material.Card
 import androidx.compose.material.Divider
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.unit.TextUnit
 import androidx.compose.ui.unit.dp
 import example.imageviewer.model.AppState
 import example.imageviewer.model.Picture
@@ -173,7 +173,7 @@ fun setMiniatureUI(
     picture: Picture,
     content: ContentState
 ) {
-
+    val active = remember { mutableStateOf(false)  }
     Card(
         backgroundColor = MiniatureColor,
         modifier = Modifier.padding(start = 10.dp, end = 10.dp).preferredHeight(70.dp)
@@ -184,11 +184,22 @@ fun setMiniatureUI(
         shape = RectangleShape,
         elevation = 2.dp
     ) {
-        Row(modifier = Modifier.padding(end = 30.dp)) {
-            Clickable(
-                onClick = {
-                    content.fullscreen(picture)
+        Row(modifier = Modifier
+            .padding(end = 30.dp)
+            .maybePointerMoveFilter(onEnter = {
+                active.value = true
+                false
+            },
+                onExit = {
+                    active.value = false
+                    false
                 }
+            )
+            .background(color = if (active.value) Color.LightGray else Color.Black)) {
+                Clickable(
+                    onClick = {
+                        content.fullscreen(picture)
+                    }
             ) {
                 Image(
                     Image.makeFromEncoded(
@@ -202,8 +213,12 @@ fun setMiniatureUI(
             }
             Text(
                 text = picture.name,
-                color = Foreground,
-                modifier = Modifier.weight(1f).align(Alignment.CenterVertically).padding(start = 16.dp),
+                color = if (active.value) Color.Red else Foreground,
+                modifier = Modifier
+                    .weight(1f)
+                    .align(Alignment.CenterVertically)
+                    .padding(start = 16.dp),
+                fontSize = TextUnit.Sp(if (active.value) 40 else 16),
                 style = MaterialTheme.typography.body1
             )
                 

examples/imageviewer/settings.gradle.kts

@@ -6,7 +6,7 @@ buildscript {
     }
 
     dependencies {
-        classpath("org.jetbrains.compose:compose-gradle-plugin:0.1.0-build58")
+        classpath("org.jetbrains.compose:compose-gradle-plugin:0.1.0-build60")
         classpath("com.android.tools.build:gradle:4.0.1")
         classpath(kotlin("gradle-plugin", version = "1.4.0"))
     }