Wizard: don't show error dialog on validation, instead navigate to the error

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/NewProjectWizardModuleBuilder.kt

@@ -61,11 +61,8 @@ class NewProjectWizardModuleBuilder : EmptyModuleBuilder() {
     companion object {
         const val MODULE_BUILDER_ID = "kotlin.newProjectWizard.builder"
         private const val DEFAULT_GROUP_ID = "me.user"
-        private val projectNameValidator = StringValidators.shouldBeValidIdentifier(
-            KotlinNewProjectWizardBundle.message("editor.entity.project.name"),
-            setOf('-', '_')
-        )
-        private val INVALID_PROJECT_NAME_MESSAGE = KotlinNewProjectWizardBundle.message("error.invalid.project.name")
+        private val projectNameValidator = StringValidators.shouldBeValidIdentifier("Project name", setOf('-', '_'))
+        private const val INVALID_PROJECT_NAME_MESSAGE = "Invalid project name"
     }
 
     override fun isAvailable(): Boolean = ExperimentalFeatures.NewWizard.isEnabled
@@ -96,7 +93,7 @@ class NewProjectWizardModuleBuilder : EmptyModuleBuilder() {
             phases = GenerationPhase.startingFrom(GenerationPhase.FIRST_STEP)
         ).onFailure { errors ->
             val errorMessages = errors.joinToString(separator = "\n") { it.message }
-            Messages.showErrorDialog(project, errorMessages, KotlinNewProjectWizardBundle.message("error.following"))
+            Messages.showErrorDialog(project, errorMessages, "The following errors arose during project generation")
         }.isSuccess
         if (success) {
             val projectCreationStats = ProjectCreationStats(
@@ -186,11 +183,16 @@ abstract class WizardStep(protected val wizard: IdeWizard, private val phase: Ge
     override fun updateDataModel() = Unit // model is updated on every UI action
     override fun validate(): Boolean =
         when (val result = wizard.context.read { with(wizard) { validate(setOf(phase)) } }) {
-            is Success<*> -> true
-            is Failure -> {
-                throw ConfigurationException(result.asHtml(), KotlinNewProjectWizardBundle.message("error.validation"))
+            ValidationResult.OK -> true
+            is ValidationResult.ValidationError -> {
+                handleErrors(result)
+                false
             }
         }
+
+    protected open fun handleErrors(error: ValidationResult.ValidationError) {
+        throw ConfigurationException(error.asHtml(), "Validation Error")
+    }
 }
 
 private class PomWizardStep(
@@ -256,4 +258,8 @@ class ModuleNewWizardSecondStep(
     override fun _init() {
         component.onInit()
     }
+
+    override fun handleErrors(error: ValidationResult.ValidationError) {
+        component.navigateTo(error)
+    }
 }

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/ui/Component.kt

@@ -5,12 +5,13 @@ import org.jetbrains.kotlin.tools.projectWizard.core.Context
 import org.jetbrains.kotlin.tools.projectWizard.core.Reader
 import org.jetbrains.kotlin.tools.projectWizard.core.SettingsWriter
 import org.jetbrains.kotlin.tools.projectWizard.core.Writer
+import org.jetbrains.kotlin.tools.projectWizard.core.entity.ValidationResult
 import org.jetbrains.kotlin.tools.projectWizard.core.entity.settings.PluginSettingPropertyReference
 import org.jetbrains.kotlin.tools.projectWizard.core.entity.settings.SettingReference
 import org.jetbrains.kotlin.tools.projectWizard.core.entity.settings.SettingType
 import org.jetbrains.kotlin.tools.projectWizard.core.entity.settings.reference
 
-abstract class Component : Displayable {
+abstract class Component : Displayable, ErrorNavigatable {
     private val subComponents = mutableListOf<Component>()
 
     open fun onInit() {
@@ -20,6 +21,10 @@ abstract class Component : Displayable {
     protected fun <C : Component> C.asSubComponent(): C = also {
         this@Component.subComponents += it
     }
+
+    override fun navigateTo(error: ValidationResult.ValidationError) {
+        subComponents.forEach { it.navigateTo(error) }
+    }
 }
 
 abstract class DynamicComponent(private val context: Context) : Component() {
@@ -66,4 +71,8 @@ abstract class TitledComponent(context: Context) : DynamicComponent(context) {
 
 interface FocusableComponent {
     fun focusOn() {}
+}
+
+interface ErrorNavigatable {
+    fun navigateTo(error: ValidationResult.ValidationError)
 }

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/ui/components/UIComponent.kt

@@ -17,7 +17,6 @@ import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.DynamicComponent
 import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.FocusableComponent
 import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.label
 import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.panel
-import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.setting.ErrorAwareComponent
 import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.setting.IdeaBasedComponentValidator
 import java.awt.BorderLayout
 import javax.swing.JComponent
@@ -27,7 +26,7 @@ abstract class UIComponent<V : Any>(
     labelText: String? = null,
     private val validator: SettingValidator<V>? = null,
     private val onValueUpdate: (V) -> Unit = {}
-) : DynamicComponent(context), ErrorAwareComponent, FocusableComponent, Disposable {
+) : DynamicComponent(context), FocusableComponent, Disposable {
     private val validationIndicator by lazy(LazyThreadSafetyMode.NONE) {
         if (validator != null)
             IdeaBasedComponentValidator(this, getValidatorTarget())
@@ -83,10 +82,14 @@ abstract class UIComponent<V : Any>(
         uiComponent.requestFocus()
     }
 
-    override fun findComponentWithError(error: ValidationResult.ValidationError): FocusableComponent? = takeIf {
-        read {
+
+    override fun navigateTo(error: ValidationResult.ValidationError) {
+        val errorInThisComponent = read {
             getUiValue()?.let { validator?.validate?.invoke(this, it)?.isSpecificError(error) } == true
         }
+        if (errorInThisComponent) {
+            focusOn()
+        }
     }
 }
 

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/ui/secondStep/ModuleSettingsComponent.kt

@@ -65,7 +65,7 @@ class ModuleSettingsComponent(
 }
 
 private class ModuleNameComponent(context: Context, module: Module) : TitledComponent(context) {
-    override val component: JComponent = TextFieldComponent(
+    private val textField = TextFieldComponent(
         context,
         labelText = null,
         initialValue = module.name,
@@ -73,7 +73,10 @@ private class ModuleNameComponent(context: Context, module: Module) : TitledComp
     ) { value ->
         module.name = value
         context.write { eventManager.fireListeners(null) }
-    }.component
+    }.asSubComponent()
+
+    override val component: JComponent
+        get() = textField.component
 
     override val title: String = "Name"
 
@@ -91,7 +94,7 @@ private class ModuleTemplateComponent(
     onTemplateChanged: () -> Unit
 ) : TitledComponent(context) {
     @OptIn(ExperimentalStdlibApi::class)
-    override val component = DropDownComponent(
+    private val dropDown = DropDownComponent(
         context,
         initialValues = buildList {
             add(NoneTemplate)
@@ -102,7 +105,10 @@ private class ModuleTemplateComponent(
     ) { value ->
         module.template = value.takeIf { it != NoneTemplate }
         onTemplateChanged()
-    }.component
+    }.asSubComponent()
+
+    override val component: JComponent
+        get() = dropDown.component
 
     override val title: String = "Template"
 

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/ui/secondStep/SecondStepWizardComponent.kt

@@ -24,6 +24,11 @@ class SecondStepWizardComponent(
         addToCenter(moduleSettingsComponent.component)
     }
 
+    override fun navigateTo(error: ValidationResult.ValidationError) {
+        moduleEditorComponent.navigateTo(error)
+        moduleSettingsComponent.navigateTo(error)
+    }
+
     private fun onNodeSelected(data: DisplayableSettingItem?) {
         moduleSettingsComponent.selectedNode = data
     }

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/ui/secondStep/TemplatesComponent.kt

@@ -1,281 +0,0 @@
-package org.jetbrains.kotlin.tools.projectWizard.wizard.ui.secondStep
-
-import com.intellij.openapi.ui.DialogWrapper
-import com.intellij.openapi.ui.Messages
-import com.intellij.openapi.ui.ex.MessagesEx
-import com.intellij.ui.JBSplitter
-import com.intellij.ui.SimpleTextAttributes
-import com.intellij.util.ui.StatusText
-import com.intellij.util.ui.UIUtil
-import org.jetbrains.kotlin.idea.KotlinIcons
-import org.jetbrains.kotlin.idea.projectWizard.UiEditorUsageStats
-import org.jetbrains.kotlin.tools.projectWizard.core.Context
-import org.jetbrains.kotlin.tools.projectWizard.core.entity.ValidationResult
-import org.jetbrains.kotlin.tools.projectWizard.moduleConfigurators.moduleType
-import org.jetbrains.kotlin.tools.projectWizard.plugins.templates.TemplatesPlugin
-import org.jetbrains.kotlin.tools.projectWizard.settings.buildsystem.Module
-import org.jetbrains.kotlin.tools.projectWizard.templates.Template
-import org.jetbrains.kotlin.tools.projectWizard.templates.settings
-import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.*
-import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.Component
-import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.setting.ErrorAwareComponent
-import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.setting.SettingComponent
-import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.setting.TitledComponentsList
-import java.awt.*
-import javax.swing.JComponent
-import javax.swing.JPanel
-
-class TemplatesComponent(
-    context: Context,
-    uiEditorUsagesStats: UiEditorUsageStats
-) : DynamicComponent(context), ErrorAwareComponent {
-    private val chooseTemplateComponent: ChooseTemplateComponent =
-        ChooseTemplateComponent(context) { template ->
-            uiEditorUsagesStats.moduleTemplatesSet++
-            module?.template = template
-            switchState(template)
-        }.asSubComponent()
-
-    private val templateSettingsComponent = TemplateSettingsComponent(context) {
-        if (MessagesEx.showOkCancelDialog(
-                component,
-                "Do you want to remove selected template from module",
-                "Remove selected template",
-                "Remove",
-                "Cancel",
-                null
-            ) == Messages.OK
-        ) {
-            uiEditorUsagesStats.moduleTemplatesRemoved++
-            module?.template = null
-            switchState(null)
-        }
-    }.asSubComponent()
-
-    override fun findComponentWithError(error: ValidationResult.ValidationError): SettingComponent<*, *>? =
-        templateSettingsComponent.findComponentWithError(error)
-
-    private fun switchState(selectedTemplate: Template?) {
-        panel.removeAll()
-        when (selectedTemplate) {
-            null -> panel.add(chooseTemplateComponent.component, BorderLayout.CENTER)
-            else -> {
-                if (module != null) {
-                    templateSettingsComponent.setTemplate(module!!, selectedTemplate)
-                }
-                panel.add(templateSettingsComponent.component, BorderLayout.CENTER)
-            }
-        }
-        panel.updateUI()
-    }
-
-    val panel = panel {
-        add(chooseTemplateComponent.component, BorderLayout.CENTER)
-    }
-
-    override val component: JComponent = panel
-
-    var module: Module? = null
-        set(value) {
-            field = value
-            switchState(value?.template)
-            chooseTemplateComponent.selectedModule = value
-        }
-}
-
-class ChooseTemplateComponent(
-    context: Context,
-    private val onTemplateChosen: (Template) -> Unit
-) : DynamicComponent(context) {
-    private enum class State(val text: String) {
-        MODULE_SELECTED_AND_TEMPLATES_AVAILABLE("You can configure a template for selected module"),
-        MODULE_SELECTED_AND_NO_TEMPLATES_AVAILABLE("No templates available for selected module"),
-        NO_MODULE_SELECTED("Please select a module to configure")
-    }
-
-    override val component: JPanel = object : JPanel() {
-        override fun paint(g: Graphics?) {
-            super.paint(g)
-            statusText.paint(this, g)
-        }
-    }
-
-    private val statusText = object : StatusText(component) {
-        override fun isStatusVisible() = true
-    }
-
-    private val allTemplates
-        get() = read {
-            TemplatesPlugin::templates.propertyValue
-        }
-
-    var selectedModule: Module? = null
-        set(value) {
-            field = value
-            onStateUpdated()
-        }
-
-    init {
-        onStateUpdated()
-    }
-
-    private val availableTemplates
-        get() = allTemplates.values.filter { template ->
-            selectedModule!!.configurator.moduleType in template.moduleTypes
-                    && template.isApplicableTo(selectedModule!!)
-        }
-
-    private val state: State
-        get() = when {
-            selectedModule == null -> State.NO_MODULE_SELECTED
-            availableTemplates.isEmpty() -> State.MODULE_SELECTED_AND_NO_TEMPLATES_AVAILABLE
-            else -> State.MODULE_SELECTED_AND_TEMPLATES_AVAILABLE
-        }
-
-    private fun onStateUpdated() {
-        statusText.clear()
-        statusText.appendText(state.text)
-        if (state == State.MODULE_SELECTED_AND_TEMPLATES_AVAILABLE) {
-            statusText.appendSecondaryText("Configure", SimpleTextAttributes.LINK_ATTRIBUTES) {
-                showDialog()
-            }
-        }
-    }
-
-
-    private fun showDialog() {
-        val availableTemplates = availableTemplates
-        if (availableTemplates.isEmpty()) {
-            MessagesEx.error(null, "No templates available for the selected module")
-        } else {
-            val dialog = TemplateListDialog(availableTemplates, component)
-            if (dialog.showAndGet()) {
-                onTemplateChosen(dialog.selectedTemplate ?: return)
-            }
-        }
-    }
-}
-
-private class TemplateListDialog(
-    values: List<Template>,
-    parent: JComponent
-) : DialogWrapper(parent, false) {
-    private val templateDescriptionComponent = TemplateDescriptionComponent(
-        needRemoveButton = false
-    ).apply {
-        component.bordered(needTopEmptyBorder = false, needBottomEmptyBorder = false)
-    }
-    private val templatesList = ImmutableSingleSelectableListWithIcon(
-        values = values,
-        renderValue = { value ->
-            icon = when {
-                value.moduleTypes.size == 1 -> value.moduleTypes.single().icon
-                else -> KotlinIcons.MPP
-            }
-            append(value.title)
-        },
-        onValueSelected = { templateDescriptor ->
-            templateDescriptionComponent.updateSelectedTemplate(templateDescriptor)
-        }
-    ).bordered(needTopEmptyBorder = false, needBottomEmptyBorder = false)
-
-    val selectedTemplate: Template?
-        get() = templatesList.selectedValue
-
-    init {
-        title = "Choose a template to configure"
-        init()
-        if (values.isNotEmpty()) {
-            templateDescriptionComponent.updateSelectedTemplate(values.first())
-        }
-    }
-
-    override fun createCenterPanel() = panel(BorderLayout()) {
-        preferredSize = Dimension(700, 300)
-        val splitter = JBSplitter(false, .3f).apply {
-            firstComponent = templatesList
-            secondComponent = templateDescriptionComponent.component
-            orientation = false
-        }
-        add(splitter, BorderLayout.CENTER)
-    }
-}
-
-class TemplateDescriptionComponent(
-    needRemoveButton: Boolean = false,
-    private val nonDefaultBackgroundColor: Color? = null,
-    onRemoveButtonClicked: () -> Unit = {}
-) : Component() {
-    private val removeButton = if (needRemoveButton) {
-        hyperlinkLabel("Remove template", onClick = onRemoveButtonClicked)
-    } else null
-
-    private val titleLabel = label("", bold = true) {
-        font = UIUtil.getListFont().let { font ->
-            Font(font.family, Font.BOLD, (font.size * 1.3).toInt())
-        }
-    }
-
-    private val title = panel {
-        nonDefaultBackgroundColor?.let { background = it }
-        add(titleLabel, BorderLayout.CENTER)
-        removeButton?.let { add(it, BorderLayout.EAST) }
-    }
-
-    private val descriptionLabel = DescriptionPanel()
-
-    override val component: JComponent by lazy(LazyThreadSafetyMode.NONE) {
-        panel {
-            nonDefaultBackgroundColor?.let { background = it }
-            add(title, BorderLayout.NORTH)
-            add(descriptionLabel, BorderLayout.CENTER)
-        }
-    }
-
-    private fun setComponentsVisibility(isVisible: Boolean) {
-        titleLabel.isVisible = isVisible
-        descriptionLabel.isVisible = isVisible
-    }
-
-    fun updateSelectedTemplate(template: Template?) {
-        setComponentsVisibility(template != null)
-        if (template != null) {
-            titleLabel.text = template.title
-            descriptionLabel.updateText(template.htmlDescription)
-        }
-    }
-}
-
-private class TemplateSettingsComponent(
-    context: Context,
-    removeTemplate: () -> Unit
-) : DynamicComponent(context), ErrorAwareComponent {
-    private val templateDescriptionComponent = TemplateDescriptionComponent(
-        needRemoveButton = true,
-        nonDefaultBackgroundColor = UIUtil.getEditorPaneBackground(),
-        onRemoveButtonClicked = removeTemplate
-    ).apply {
-        component.bordered(needTopEmptyBorder = false, needBottomEmptyBorder = false)
-    }
-
-    private val settings = TitledComponentsList(emptyList(), context).apply {
-        component.bordered()
-    }
-
-    override fun findComponentWithError(error: ValidationResult.ValidationError): SettingComponent<*, *>? = null
-
-
-    fun setTemplate(module: Module, selectedTemplate: Template) {
-        settings.setSettings(selectedTemplate.settings(module))
-        templateDescriptionComponent.updateSelectedTemplate(selectedTemplate)
-    }
-
-    override val component: JComponent = splitterFor(
-        templateDescriptionComponent.component,
-        settings.component,
-        vertical = true
-    ).apply {
-        (this as JBSplitter).proportion = .7f
-    }
-}
-

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/ui/secondStep/modulesEditor/ModulesEditorComponent.kt

@@ -1,8 +1,10 @@
 package org.jetbrains.kotlin.tools.projectWizard.wizard.ui.secondStep.modulesEditor
 
 import com.intellij.ui.JBColor
+import com.intellij.util.ui.JBUI
 import org.jetbrains.kotlin.idea.projectWizard.UiEditorUsageStats
 import org.jetbrains.kotlin.tools.projectWizard.core.Context
+import org.jetbrains.kotlin.tools.projectWizard.core.entity.ValidationResult
 import org.jetbrains.kotlin.tools.projectWizard.core.entity.settings.ListSettingType
 import org.jetbrains.kotlin.tools.projectWizard.core.entity.settings.reference
 import org.jetbrains.kotlin.tools.projectWizard.plugins.kotlin.KotlinPlugin
@@ -27,6 +29,8 @@ class ModulesEditorComponent(
     private val tree: ModulesEditorTree =
         ModulesEditorTree(
             onSelected = { oneEntrySelected(it) },
+            context = context,
+            isTreeEditable = editable,
             addModule = { component ->
                 val isMppProject = KotlinPlugin::projectKind.value == ProjectKind.Singleplatform
                 moduleCreator.create(
@@ -39,7 +43,9 @@ class ModulesEditorComponent(
                     createModule = model::add
                 )?.showInCenterOf(component)
             }
-        )
+        ).apply {
+            border = JBUI.Borders.emptyRight(10)
+        }
 
     private val model = TargetsModel(tree, ::value, context, uiEditorUsagesStats)
 
@@ -52,6 +58,11 @@ class ModulesEditorComponent(
         model.update()
     }
 
+    override fun navigateTo(error: ValidationResult.ValidationError) {
+        val targetModule = error.target as? Module ?: return
+        tree.selectModule(targetModule)
+    }
+
     private val moduleCreator = NewModuleCreator()
 
     private val toolbarDecorator = if (editable) ModulesEditorToolbarDecorator(

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/ui/secondStep/modulesEditor/ModulesEditorTree.kt

@@ -3,23 +3,28 @@ package org.jetbrains.kotlin.tools.projectWizard.wizard.ui.secondStep.modulesEdi
 import com.intellij.icons.AllIcons
 import com.intellij.ui.ColoredTreeCellRenderer
 import com.intellij.ui.SimpleTextAttributes
+import com.intellij.ui.components.JBLabel
 import com.intellij.ui.treeStructure.Tree
+import org.jetbrains.kotlin.tools.projectWizard.core.Context
+import org.jetbrains.kotlin.tools.projectWizard.core.entity.ValidationResult
 import org.jetbrains.kotlin.tools.projectWizard.settings.DisplayableSettingItem
 import org.jetbrains.kotlin.tools.projectWizard.settings.buildsystem.Module
 import org.jetbrains.kotlin.tools.projectWizard.settings.buildsystem.Sourceset
 import org.jetbrains.kotlin.tools.projectWizard.settings.buildsystem.path
-import org.jetbrains.kotlin.tools.projectWizard.wizard.KotlinNewProjectWizardBundle
+import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.borderPanel
 import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.icon
 import org.jetbrains.kotlin.utils.addToStdlib.safeAs
+import java.awt.Component
+import java.awt.Graphics2D
 import javax.swing.JComponent
+import javax.swing.JLabel
 import javax.swing.JTree
-import javax.swing.tree.DefaultMutableTreeNode
-import javax.swing.tree.DefaultTreeModel
-import javax.swing.tree.TreePath
-import javax.swing.tree.TreeSelectionModel
+import javax.swing.tree.*
 
 class ModulesEditorTree(
     private val onSelected: (DisplayableSettingItem?) -> Unit,
+    context: Context,
+    isTreeEditable: Boolean,
     private val addModule: (JComponent) -> Unit
 ) : Tree(DefaultMutableTreeNode(PROJECT_USER_OBJECT)) {
     val model: DefaultTreeModel get() = super.getModel() as DefaultTreeModel
@@ -64,41 +69,81 @@ class ModulesEditorTree(
         }
 
         emptyText.clear()
-        emptyText.appendText(KotlinNewProjectWizardBundle.message("editor.no.modules.created"))
+        emptyText.appendText("No modules created")
         emptyText.appendSecondaryText(
-            KotlinNewProjectWizardBundle.message("editor.add.module.to.project"),
+            "Add a module to the project",
             SimpleTextAttributes.LINK_PLAIN_ATTRIBUTES
         ) {
             addModule(this)
         }
 
-        setCellRenderer(object : ColoredTreeCellRenderer() {
-            override fun customizeCellRenderer(
-                tree: JTree,
-                value: Any?,
-                selected: Boolean,
-                expanded: Boolean,
-                leaf: Boolean,
-                row: Int,
-                hasFocus: Boolean
-            ) {
-                if (value?.safeAs<DefaultMutableTreeNode>()?.userObject == PROJECT_USER_OBJECT) {
-                    icon = AllIcons.Nodes.Project
-                    append(KotlinNewProjectWizardBundle.message("editor.project"))
-                    return
-                }
-                val setting = (value as? DefaultMutableTreeNode)?.userObject as? DisplayableSettingItem ?: return
-                icon = when (setting) {
-                    is Module -> setting.icon
-                    is Sourceset -> AllIcons.Nodes.Module
-                    else -> null
-                }
-                append(setting.text)
-                setting.greyText?.let { greyText ->
-                    append(" ")
-                    append(greyText, SimpleTextAttributes.GRAYED_ATTRIBUTES)
+        setCellRenderer(CellRenderer(context, renderErrors = isTreeEditable))
+    }
+}
+
+private class CellRenderer(private val context: Context, renderErrors: Boolean) : TreeCellRenderer {
+    override fun getTreeCellRendererComponent(
+        tree: JTree?,
+        value: Any?,
+        selected: Boolean,
+        expanded: Boolean,
+        leaf: Boolean,
+        row: Int,
+        hasFocus: Boolean
+    ): Component {
+        setError(null)
+        val renderedCell = coloredCellRenderer.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus)
+        return borderPanel {
+            addToCenter(renderedCell)
+            addToRight(iconLabel)
+        }
+    }
+
+    private val iconLabel = JBLabel("")
+
+    private fun setError(error: ValidationResult.ValidationError?) {
+        val message = error?.messages?.firstOrNull()
+        if (message == null) {
+            iconLabel.icon = null
+        } else {
+            iconLabel.icon = AllIcons.General.Error
+        }
+    }
+
+    private val coloredCellRenderer = object : ColoredTreeCellRenderer() {
+        override fun customizeCellRenderer(
+            tree: JTree,
+            value: Any?,
+            selected: Boolean,
+            expanded: Boolean,
+            leaf: Boolean,
+            row: Int,
+            hasFocus: Boolean
+        ) {
+            if (value?.safeAs<DefaultMutableTreeNode>()?.userObject == ModulesEditorTree.PROJECT_USER_OBJECT) {
+                icon = AllIcons.Nodes.Project
+                append("Project")
+                return
+            }
+            val setting = (value as? DefaultMutableTreeNode)?.userObject as? DisplayableSettingItem ?: return
+            icon = when (setting) {
+                is Module -> setting.icon
+                is Sourceset -> AllIcons.Nodes.Module
+                else -> null
+            }
+            append(setting.text)
+            setting.greyText?.let { greyText ->
+                append(" ")
+                append(greyText, SimpleTextAttributes.GRAYED_ATTRIBUTES)
+            }
+            if (renderErrors) {
+                if (setting is Module) context.read {
+                    val validationResult = setting.validator.validate(this, setting)
+                    setError(validationResult as? ValidationResult.ValidationError)
+                } else {
+                    setError(null)
                 }
             }
-        })
+        }
     }
 }

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/ui/setting/TitledComponentsList.kt

@@ -9,10 +9,6 @@ import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.DynamicComponent
 import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.FocusableComponent
 import org.jetbrains.kotlin.tools.projectWizard.wizard.ui.TitledComponent
 
-interface ErrorAwareComponent {
-    fun findComponentWithError(error: ValidationResult.ValidationError): FocusableComponent?
-}
-
 class TitledComponentsList(
     private var components: List<TitledComponent>,
     private val context: Context
@@ -25,6 +21,10 @@ class TitledComponentsList(
 
     override val component get() = ui
 
+    override fun navigateTo(error: ValidationResult.ValidationError) {
+        components.forEach { it.navigateTo(error) }
+    }
+
     override fun onInit() {
         super.onInit()
         components.forEach { it.onInit() }

idea/idea-new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/ui/ui.kt

@@ -15,6 +15,7 @@ import com.intellij.util.ui.UIUtil
 import com.intellij.util.ui.components.BorderLayoutPanel
 import org.jetbrains.kotlin.idea.KotlinIcons
 import org.jetbrains.kotlin.tools.projectWizard.core.Failure
+import org.jetbrains.kotlin.tools.projectWizard.core.entity.ValidationResult
 import org.jetbrains.kotlin.tools.projectWizard.moduleConfigurators.ModuleConfigurator
 import org.jetbrains.kotlin.tools.projectWizard.moduleConfigurators.SimpleTargetConfigurator
 import org.jetbrains.kotlin.tools.projectWizard.moduleConfigurators.TargetConfigurator
@@ -69,11 +70,11 @@ internal fun hyperlinkLabel(
 
 internal fun String.asHtml() = "<html><body>$this</body></html>"
 
-fun Failure.asHtml() = when (errors.size) {
+fun ValidationResult.ValidationError.asHtml() = when (messages.size) {
     0 -> ""
-    1 -> errors.single().message
+    1 -> messages.single()
     else -> {
-        val errorsList = errors.joinToString(separator = "") { "<li>${it.message}</li>" }
+        val errorsList = messages.joinToString(separator = "") { "<li>${it}</li>" }
         "<ul>$errorsList</ul>".asHtml()
     }
 }

libraries/tools/new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/core/entity/SettingValidator.kt

@@ -61,7 +61,7 @@ sealed class ValidationResult {
 
     infix fun and(other: ValidationResult) = when {
         this is OK -> other
-        this is ValidationError && other is ValidationError -> ValidationError(messages + other.messages)
+        this is ValidationError && other is ValidationError -> ValidationError(messages + other.messages, target ?: other.target)
         else -> this
     }
 

libraries/tools/new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/plugins/StructurePlugin.kt

@@ -8,6 +8,7 @@ import org.jetbrains.kotlin.tools.projectWizard.core.entity.settings.reference
 import org.jetbrains.kotlin.tools.projectWizard.core.service.FileSystemWizardService
 import org.jetbrains.kotlin.tools.projectWizard.ir.buildsystem.PomIR
 import org.jetbrains.kotlin.tools.projectWizard.phases.GenerationPhase
+import org.jetbrains.kotlin.tools.projectWizard.settings.buildsystem.Module
 import org.jetbrains.kotlin.tools.projectWizard.settings.version.Version
 import java.nio.file.Paths
 
@@ -15,7 +16,10 @@ class StructurePlugin(context: Context) : Plugin(context) {
     val projectPath by pathSetting("Location", GenerationPhase.PROJECT_GENERATION) {
         defaultValue = value(Paths.get("."))
     }
-    val name by stringSetting("Name", GenerationPhase.PROJECT_GENERATION)
+    val name by stringSetting("Name", GenerationPhase.PROJECT_GENERATION) {
+        shouldNotBeBlank()
+        validate(StringValidators.shouldBeValidIdentifier("Name", Module.ALLOWED_SPECIAL_CHARS_IN_MODULE_NAMES))
+    }
 
     val groupId by stringSetting("Group ID", GenerationPhase.PROJECT_GENERATION) {
         isSavable = true

libraries/tools/new-project-wizard/src/org/jetbrains/kotlin/tools/projectWizard/wizard/Wizard.kt

@@ -39,13 +39,13 @@ abstract class Wizard(createPlugins: PluginsCreator, servicesManager: ServicesMa
         }
     }
 
-    fun validate(phases: Set<GenerationPhase>): TaskResult<Unit> = context.read {
+    fun validate(phases: Set<GenerationPhase>): ValidationResult = context.read {
         pluginSettings.map { setting ->
             val value = setting.reference.notRequiredSettingValue ?: return@map ValidationResult.OK
             if (setting.neededAtPhase in phases && setting.isActive(this))
                 (setting.validator as SettingValidator<Any>).validate(this, value)
             else ValidationResult.OK
-        }.fold().toResult()
+        }.fold()
     }
 
     private fun saveSettingValues(phases: Set<GenerationPhase>) = context.read {
@@ -69,7 +69,7 @@ abstract class Wizard(createPlugins: PluginsCreator, servicesManager: ServicesMa
         initPluginSettingsDefaultValues()
         initNonPluginDefaultValues()
         checkAllRequiredSettingPresent(phases).ensure()
-        validate(phases).ensure()
+        validate(phases).toResult().ensure()
         saveSettingValues(phases)
         val (tasksSorted) = context.sortTasks().map { tasks ->
             tasks.groupBy { it.phase }.toList().sortedBy { it.first }.flatMap { it.second }