Add previews to TodoApp example (#909)

examples/todoapp/desktop/build.gradle.kts

@@ -25,6 +25,11 @@ kotlin {
                 implementation(Deps.ArkIvanov.MVIKotlin.mvikotlinMain)
                 implementation(Deps.Badoo.Reaktive.reaktive)
                 implementation(Deps.Badoo.Reaktive.coroutinesInterop)
+
+                // The dependencies below are required only for previews, see https://github.com/JetBrains/compose-jb/issues/908
+                implementation(compose.uiTooling)
+                implementation(project(":common:edit"))
+                implementation(project(":common:main"))
             }
         }
     }
@@ -38,7 +43,7 @@ compose.desktop {
             targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
             packageName = "ComoseDesktopTodo"
             packageVersion = "1.0.0"
-            
+
             modules("java.sql")
 
             windows {

examples/todoapp/desktop/src/jvmMain/kotlin/example/todo/desktop/TodoEditPreview.kt

@@ -0,0 +1,33 @@
+/*
+ * Should be in the compose-ui module, see https://github.com/JetBrains/compose-jb/issues/908
+ */
+
+package example.todo.desktop
+
+import androidx.compose.desktop.ui.tooling.preview.Preview
+import androidx.compose.runtime.Composable
+import com.arkivanov.decompose.value.MutableValue
+import com.arkivanov.decompose.value.Value
+import example.todo.common.edit.TodoEdit
+import example.todo.common.edit.TodoEdit.Model
+import example.todo.common.ui.TodoEditContent
+
+@Composable
+@Preview
+fun TodoEditContentPreview() {
+    TodoEditContent(TodoEditPreview())
+}
+
+class TodoEditPreview : TodoEdit {
+    override val models: Value<Model> =
+        MutableValue(
+            Model(
+                text = "Some text",
+                isDone = true
+            )
+        )
+
+    override fun onTextChanged(text: String) {}
+    override fun onDoneChanged(isDone: Boolean) {}
+    override fun onCloseClicked() {}
+}

examples/todoapp/desktop/src/jvmMain/kotlin/example/todo/desktop/TodoMainPreview.kt

@@ -0,0 +1,42 @@
+/*
+ * Should be in the compose-ui module, see https://github.com/JetBrains/compose-jb/issues/908
+ */
+
+package example.todo.desktop
+
+import androidx.compose.desktop.ui.tooling.preview.Preview
+import androidx.compose.runtime.Composable
+import com.arkivanov.decompose.value.MutableValue
+import com.arkivanov.decompose.value.Value
+import example.todo.common.main.TodoItem
+import example.todo.common.main.TodoMain
+import example.todo.common.main.TodoMain.Model
+import example.todo.common.ui.TodoMainContent
+
+@Preview
+@Composable
+fun TodoMainContentPreview() {
+    TodoMainContent(TodoMainPreview())
+}
+
+class TodoMainPreview : TodoMain {
+    override val models: Value<Model> =
+        MutableValue(
+            Model(
+                items = List(5) { index ->
+                    TodoItem(
+                        id = index.toLong(),
+                        text = "Item $index",
+                        isDone = index % 2 == 0
+                    )
+                },
+                text = "Some text"
+            )
+        )
+
+    override fun onItemClicked(id: Long) {}
+    override fun onItemDoneChanged(id: Long, isDone: Boolean) {}
+    override fun onItemDeleteClicked(id: Long) {}
+    override fun onInputTextChanged(text: String) {}
+    override fun onAddItemClicked() {}
+}