feat: update demo

samples/shared/src/commonMain/kotlin/App.kt

@@ -21,18 +21,20 @@
  */
 @file:OptIn(ExperimentalFoundationApi::class)
 
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
 import androidx.compose.foundation.ExperimentalFoundationApi
+import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.pager.HorizontalPager
 import androidx.compose.foundation.pager.rememberPagerState
 import androidx.compose.runtime.Composable
-import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.Stable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -41,34 +43,79 @@ import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalUriHandler
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.em
+import com.highcapable.betterandroid.compose.extension.ui.ComponentPadding
+import com.highcapable.betterandroid.compose.multiplatform.backpress.BackHandler
+import com.highcapable.betterandroid.compose.multiplatform.systembar.PlatformSystemBarStyle
+import com.highcapable.betterandroid.compose.multiplatform.systembar.rememberSystemBarsController
+import com.highcapable.betterandroid.compose.multiplatform.systembar.setStyle
 import com.highcapable.flexiui.FlexiTheme
 import com.highcapable.flexiui.component.AreaBox
 import com.highcapable.flexiui.component.AreaColumn
+import com.highcapable.flexiui.component.Button
+import com.highcapable.flexiui.component.DropdownList
+import com.highcapable.flexiui.component.DropdownMenuItem
+import com.highcapable.flexiui.component.HorizontalItemBox
 import com.highcapable.flexiui.component.Icon
 import com.highcapable.flexiui.component.IconDefaults
 import com.highcapable.flexiui.component.NavigationBarItem
 import com.highcapable.flexiui.component.NavigationBarRow
 import com.highcapable.flexiui.component.PrimaryAppBar
 import com.highcapable.flexiui.component.Scaffold
+import com.highcapable.flexiui.component.SecondaryAppBar
+import com.highcapable.flexiui.component.Surface
 import com.highcapable.flexiui.component.SwitchItem
 import com.highcapable.flexiui.component.Text
 import com.highcapable.flexiui.resources.FlexiIcons
 import kotlinx.coroutines.launch
 
-@Stable
-data class AppPreferences(
-    var darkMode: MutableState<Boolean> = mutableStateOf(false),
-    var followSystemDarkMode: MutableState<Boolean> = mutableStateOf(false)
-)
+private const val PROJECT_URL = "https://github.com/BetterAndroid/FlexiUI"
 
+@Composable
+private fun FlexiDemoTheme(content: @Composable () -> Unit) {
+    val systemBars = rememberSystemBarsController()
+    val darkMode by remember { Preferences.darkMode }
+    val followSystemDarkMode by remember { Preferences.followSystemDarkMode }
+    val currentDarkMode = if (followSystemDarkMode) isSystemInDarkTheme() else darkMode
+    val colorScheme by remember { Preferences.colorScheme }
+    systemBars.setStyle(
+        if (currentDarkMode)
+            PlatformSystemBarStyle.DarkTransparent
+        else PlatformSystemBarStyle.LightTransparent
+    )
+    FlexiTheme(
+        colors = colorScheme.toColors(currentDarkMode),
+        content = content
+    )
+}
+
+/** Simulate a router. */
 @Stable
-private val Preferences = AppPreferences()
+private var CurrentPage = mutableStateOf(0)
+
+@Composable
+private fun rememberCurrentPage() = remember { CurrentPage }
+
+@Composable
+private fun Page(page: Int, content: @Composable () -> Unit) {
+    val currentPage by remember { CurrentPage }
+    AnimatedVisibility(
+        visible = currentPage == page,
+        enter = fadeIn(),
+        exit = fadeOut()
+    ) { content() }
+}
 
 @Composable
 fun App() {
-    FlexiTheme {
-        MainScreen()
+    FlexiDemoTheme {
+        // Surface will keep the content background color when animation.
+        Surface(padding = ComponentPadding()) {
+            Page(0) { MainScreen() }
+            Page(1) { SecondaryScreen() }
+        }
     }
 }
 
@@ -77,13 +124,14 @@ fun MainScreen() {
     val pageCount = 2
     val state = rememberPagerState(pageCount = { pageCount })
     val scope = rememberCoroutineScope()
+    val uriHandler = LocalUriHandler.current
     Scaffold(
         appBar = {
             PrimaryAppBar(
                 title = { Text("Flexi UI Demo") },
                 actions = {
                     ActionIconButton(
-                        onClick = { /* TODO */ }
+                        onClick = { uriHandler.openUri(PROJECT_URL) }
                     ) { Icon(FlexiIcons.GitHub) }
                 }
             )
@@ -127,24 +175,61 @@ fun MainHomePage() {
         }
         PrimarySpacer()
         AreaColumn(modifier = Modifier.fillMaxWidth()) {
+            var colorScheme by remember { Preferences.colorScheme }
             var darkMode by remember { Preferences.darkMode }
             var followSystemDarkMode by remember { Preferences.followSystemDarkMode }
             SecondaryText("Theme Style")
             PrimarySpacer()
-            SwitchItem(
-                checked = darkMode,
-                onCheckedChange = { darkMode = it }
-            ) { Text("Enable night mode") }
-            SecondarySpacer()
-            SecondaryText("Manually switch the current theme to night mode.")
-            PrimarySpacer()
+            AnimatedVisibility(visible = !followSystemDarkMode) {
+                Column {
+                    SwitchItem(
+                        checked = darkMode,
+                        onCheckedChange = { darkMode = it }
+                    ) { Text("Enable night mode") }
+                    SecondarySpacer()
+                    SecondaryText("Manually switch the current theme to night mode.")
+                    PrimarySpacer()
+                }
+            }
             SwitchItem(
                 checked = followSystemDarkMode,
                 onCheckedChange = { followSystemDarkMode = it }
             ) { Text("Follow system night mode") }
             SecondarySpacer()
             SecondaryText("Follow the system theme to switch day and night mode.")
+            PrimarySpacer()
+            Row(
+                modifier = Modifier.fillMaxWidth(),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                var expanded by remember { mutableStateOf(false) }
+                Text("Current Theme")
+                PrimarySpacer()
+                DropdownList(
+                    modifier = Modifier.fillMaxWidth(),
+                    expanded = expanded,
+                    onExpandedChange = { expanded = it },
+                    text = { Text(colorScheme.toName()) },
+                ) {
+                    colorSchemes().forEach {
+                        DropdownMenuItem(
+                            actived = colorScheme == it,
+                            onClick = {
+                                expanded = false
+                                colorScheme = it
+                            }
+                        ) { Text(it.toName()) }
+                    }
+                }
+            }
         }
+        PrimarySpacer()
+        var currentPage by rememberCurrentPage()
+        HorizontalItemBox(
+            onClick = { currentPage = 1 },
+            title = { Text("Single Page Demo") },
+            subtitle = { Text("Open a single page.") }
+        )
     }
 }
 
@@ -158,20 +243,32 @@ fun MainComponentPage() {
 }
 
 @Composable
-private fun PrimarySpacer() {
-    Spacer(modifier = Modifier.height(10.dp))
-}
-
-@Composable
-private fun SecondarySpacer() {
-    Spacer(modifier = Modifier.height(5.dp))
-}
-
-@Composable
-private fun SecondaryText(text: String) {
-    Text(
-        text = text,
-        color = FlexiTheme.colors.textSecondary,
-        style = FlexiTheme.typography.secondary
-    )
+fun SecondaryScreen() {
+    var currentPage by rememberCurrentPage()
+    Scaffold(
+        appBar = {
+            SecondaryAppBar(
+                title = { Text("Single Page") },
+                navigationIcon = {
+                    NavigationIconButton(onClick = { currentPage = 0 })
+                }
+            )
+        }
+    ) {
+        AreaColumn(modifier = Modifier.fillMaxWidth()) {
+            Text(
+                """
+                  Now, you open a separate secondary page.
+                  You can click the button below to back to the homepage.
+                """.trimIndent(),
+                style = FlexiTheme.typography.primary.copy(lineHeight = 2.em)
+            )
+            PrimarySpacer()
+            Button(
+                modifier = Modifier.fillMaxWidth(),
+                onClick = { currentPage = 0 }
+            ) { Text("Take Me Home") }
+        }
+        BackHandler { currentPage = 0 }
+    }
 }

samples/shared/src/commonMain/kotlin/Components.kt

@@ -0,0 +1,50 @@
+/*
+ * Flexi UI - A flexible and useful UI component library.
+ * Copyright (C) 2019-2024 HighCapable
+ * https://github.com/BetterAndroid/FlexiUI
+ *
+ * Apache License Version 2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is created by fankes on 2024/1/11.
+ */
+
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.size
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import com.highcapable.flexiui.FlexiTheme
+import com.highcapable.flexiui.component.Text
+
+// TODO: Some components can be include to Flexi UI (To be determined)
+
+@Composable
+fun PrimarySpacer() {
+    Spacer(modifier = Modifier.size(10.dp))
+}
+
+@Composable
+fun SecondarySpacer() {
+    Spacer(modifier = Modifier.size(5.dp))
+}
+
+@Composable
+fun SecondaryText(text: String) {
+    Text(
+        text = text,
+        color = FlexiTheme.colors.textSecondary,
+        style = FlexiTheme.typography.secondary
+    )
+}

samples/shared/src/commonMain/kotlin/Preferences.kt

@@ -0,0 +1,145 @@
+/*
+ * Flexi UI - A flexible and useful UI component library.
+ * Copyright (C) 2019-2024 HighCapable
+ * https://github.com/BetterAndroid/FlexiUI
+ *
+ * Apache License Version 2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * This file is created by fankes on 2024/1/11.
+ */
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.Stable
+import androidx.compose.runtime.mutableStateOf
+import com.highcapable.flexiui.blueColors
+import com.highcapable.flexiui.defaultColors
+import com.highcapable.flexiui.greenColors
+import com.highcapable.flexiui.isSystemColorAvailable
+import com.highcapable.flexiui.orangeColors
+import com.highcapable.flexiui.pinkColors
+import com.highcapable.flexiui.purpleColors
+import com.highcapable.flexiui.redColors
+import com.highcapable.flexiui.systemColors
+import com.highcapable.flexiui.yellowColors
+
+@Stable
+data class AppPreferences(
+    var colorScheme: MutableState<ColorScheme> = mutableStateOf(ColorScheme.Default),
+    var darkMode: MutableState<Boolean> = mutableStateOf(false),
+    var followSystemDarkMode: MutableState<Boolean> = mutableStateOf(false)
+)
+
+// TODO: Include ColorScheme to Flexi UI's Colors.kt
+
+@Stable
+val Preferences = AppPreferences()
+
+@Stable
+enum class ColorScheme {
+    Default,
+    DefaultBlack,
+    System,
+    SystemBlack,
+    Red,
+    RedBlack,
+    Pink,
+    PinkBlack,
+    Purple,
+    PurpleBlack,
+    Orange,
+    OrangeBlack,
+    Yellow,
+    YellowBlack,
+    Green,
+    GreenBlack,
+    Blue,
+    BlueBlack
+}
+
+@Composable
+fun colorSchemes(): Array<ColorScheme> {
+    val defaultColors = arrayOf(
+        ColorScheme.Default,
+        ColorScheme.DefaultBlack
+    )
+    val systemColors = arrayOf(
+        ColorScheme.System,
+        ColorScheme.SystemBlack
+    )
+    val presetColors = arrayOf(
+        ColorScheme.Red,
+        ColorScheme.RedBlack,
+        ColorScheme.Pink,
+        ColorScheme.PinkBlack,
+        ColorScheme.Purple,
+        ColorScheme.PurpleBlack,
+        ColorScheme.Orange,
+        ColorScheme.OrangeBlack,
+        ColorScheme.Yellow,
+        ColorScheme.YellowBlack,
+        ColorScheme.Green,
+        ColorScheme.GreenBlack,
+        ColorScheme.Blue,
+        ColorScheme.BlueBlack
+    )
+    return if (isSystemColorAvailable())
+        defaultColors + systemColors + presetColors
+    else defaultColors + presetColors
+}
+
+@Composable
+fun ColorScheme.toColors(darkMode: Boolean) = when (this) {
+    ColorScheme.Default -> defaultColors(darkMode)
+    ColorScheme.DefaultBlack -> defaultColors(darkMode, blackDarkMode = true)
+    ColorScheme.System -> systemColors(darkMode)
+    ColorScheme.SystemBlack -> systemColors(darkMode, blackDarkMode = true)
+    ColorScheme.Red -> redColors(darkMode)
+    ColorScheme.RedBlack -> redColors(darkMode, blackDarkMode = true)
+    ColorScheme.Pink -> pinkColors(darkMode)
+    ColorScheme.PinkBlack -> pinkColors(darkMode, blackDarkMode = true)
+    ColorScheme.Purple -> purpleColors(darkMode)
+    ColorScheme.PurpleBlack -> purpleColors(darkMode, blackDarkMode = true)
+    ColorScheme.Orange -> orangeColors(darkMode)
+    ColorScheme.OrangeBlack -> orangeColors(darkMode, blackDarkMode = true)
+    ColorScheme.Yellow -> yellowColors(darkMode)
+    ColorScheme.YellowBlack -> yellowColors(darkMode, blackDarkMode = true)
+    ColorScheme.Green -> greenColors(darkMode)
+    ColorScheme.GreenBlack -> greenColors(darkMode, blackDarkMode = true)
+    ColorScheme.Blue -> blueColors(darkMode)
+    ColorScheme.BlueBlack -> blueColors(darkMode, blackDarkMode = true)
+}
+
+@Stable
+fun ColorScheme.toName() = when (this) {
+    ColorScheme.Default -> "Default"
+    ColorScheme.DefaultBlack -> "Default (Black)"
+    ColorScheme.System -> "System"
+    ColorScheme.SystemBlack -> "System (Black)"
+    ColorScheme.Red -> "Red"
+    ColorScheme.RedBlack -> "Red (Black)"
+    ColorScheme.Pink -> "Pink"
+    ColorScheme.PinkBlack -> "Pink (Black)"
+    ColorScheme.Purple -> "Purple"
+    ColorScheme.PurpleBlack -> "Purple (Black)"
+    ColorScheme.Orange -> "Orange"
+    ColorScheme.OrangeBlack -> "Orange (Black)"
+    ColorScheme.Yellow -> "Yellow"
+    ColorScheme.YellowBlack -> "Yellow (Black)"
+    ColorScheme.Green -> "Green"
+    ColorScheme.GreenBlack -> "Green (Black)"
+    ColorScheme.Blue -> "Blue"
+    ColorScheme.BlueBlack -> "Blue (Black)"
+}