Add multi-texture import, drag and drop support

editor/src/main/com/mbrlabs/mundus/editor/Editor.kt

@@ -28,6 +28,7 @@ import com.mbrlabs.mundus.commons.utils.ShaderUtils
 import com.mbrlabs.mundus.editor.core.project.ProjectContext
 import com.mbrlabs.mundus.editor.core.project.ProjectManager
 import com.mbrlabs.mundus.editor.core.registry.Registry
+import com.mbrlabs.mundus.editor.events.FilesDroppedEvent
 import com.mbrlabs.mundus.editor.events.FullScreenEvent
 import com.mbrlabs.mundus.editor.events.ProjectChangedEvent
 import com.mbrlabs.mundus.editor.events.SceneChangedEvent
@@ -192,6 +193,10 @@ class Editor : Lwjgl3WindowAdapter(), ApplicationListener,
     override fun pause() {}
     override fun resume() {}
 
+    override fun filesDropped(files: Array<out String>?) {
+        Mundus.postEvent(FilesDroppedEvent(files))
+    }
+
     override fun dispose() {
         Mundus.dispose()
     }

editor/src/main/com/mbrlabs/mundus/editor/events/FilesDroppedEvent.kt

@@ -0,0 +1,15 @@
+package com.mbrlabs.mundus.editor.events
+
+/**
+ * Event which is posted when files are dropped from an operating system into the mundus window.
+ *
+ * @author JamesTKhan
+ * @version July 18, 2022
+ */
+class FilesDroppedEvent(val files: Array<out String>?) {
+
+    interface FilesDroppedListener {
+        @Subscribe
+        fun onFilesDropped(event: FilesDroppedEvent)
+    }
+}

editor/src/main/com/mbrlabs/mundus/editor/ui/modules/dialogs/BaseDialog.kt

@@ -16,13 +16,27 @@
 
 package com.mbrlabs.mundus.editor.ui.modules.dialogs
 
+import com.badlogic.gdx.scenes.scene2d.Stage
 import com.kotcrab.vis.ui.widget.VisDialog
 
 /**
+ * Base dialog to extend from. Tracks if it is currently open or not.
+ *
  * @author Marcus Brummer
  * @version 25-11-2015
  */
 open class BaseDialog(title: String) : VisDialog(title) {
+    protected var dialogOpen = false
+
+    override fun show(stage: Stage?): VisDialog {
+        dialogOpen = true
+        return super.show(stage)
+    }
+
+    override fun close() {
+        super.close()
+        dialogOpen = false
+    }
 
     init {
         addCloseButton()

editor/src/main/com/mbrlabs/mundus/editor/ui/modules/dialogs/SkyboxDialog.kt

@@ -22,6 +22,7 @@ import com.badlogic.gdx.scenes.scene2d.InputEvent
 import com.badlogic.gdx.scenes.scene2d.Stage
 import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener
 import com.badlogic.gdx.scenes.scene2d.utils.ClickListener
+import com.badlogic.gdx.utils.Array
 import com.kotcrab.vis.ui.util.FloatDigitsOnlyFilter
 import com.kotcrab.vis.ui.util.dialog.Dialogs
 import com.kotcrab.vis.ui.widget.VisCheckBox
@@ -44,6 +45,7 @@ import com.mbrlabs.mundus.editor.events.SceneChangedEvent
 import com.mbrlabs.mundus.editor.shader.Shaders
 import com.mbrlabs.mundus.editor.ui.widgets.ImageChooserField
 import com.mbrlabs.mundus.editor.utils.createDefaultSkybox
+import java.util.HashMap
 
 /**
  * @author Marcus Brummer
@@ -57,12 +59,12 @@ class SkyboxDialog : BaseDialog("Skybox"), ProjectChangedEvent.ProjectChangedLis
     private lateinit var rotateEnabled: VisCheckBox
     private var rotateSpeed = VisTextField()
 
-    private val positiveX: ImageChooserField = ImageChooserField(100, this)
-    private var negativeX: ImageChooserField = ImageChooserField(100, this)
-    private var positiveY: ImageChooserField = ImageChooserField(100, this)
-    private var negativeY: ImageChooserField = ImageChooserField(100, this)
-    private var positiveZ: ImageChooserField = ImageChooserField(100, this)
-    private var negativeZ: ImageChooserField = ImageChooserField(100, this)
+    private val positiveX: ImageChooserField = ImageChooserField(100, false, this)
+    private var negativeX: ImageChooserField = ImageChooserField(100, false, this)
+    private var positiveY: ImageChooserField = ImageChooserField(100, false, this)
+    private var negativeY: ImageChooserField = ImageChooserField(100, false, this)
+    private var positiveZ: ImageChooserField = ImageChooserField(100, false, this)
+    private var negativeZ: ImageChooserField = ImageChooserField(100, false, this)
 
     private var createBtn = VisTextButton("Create skybox")
     private var defaultBtn = VisTextButton("Create default skybox")
@@ -377,4 +379,11 @@ class SkyboxDialog : BaseDialog("Skybox"), ProjectChangedEvent.ProjectChangedLis
         validateFields()
     }
 
+    override fun onImagesChosen(
+        images: Array<FileHandle>?,
+        failedFiles: HashMap<FileHandle, String>
+    ) {
+        // Unused
+    }
+
 }

editor/src/main/com/mbrlabs/mundus/editor/ui/modules/dialogs/importer/ImportTextureDialog.kt

@@ -16,29 +16,35 @@
 
 package com.mbrlabs.mundus.editor.ui.modules.dialogs.importer
 
+import com.badlogic.gdx.files.FileHandle
 import com.badlogic.gdx.scenes.scene2d.InputEvent
 import com.badlogic.gdx.scenes.scene2d.ui.Table
 import com.badlogic.gdx.scenes.scene2d.utils.ClickListener
 import com.badlogic.gdx.utils.Align
+import com.badlogic.gdx.utils.Array
 import com.badlogic.gdx.utils.Disposable
+import com.kotcrab.vis.ui.util.dialog.Dialogs
 import com.kotcrab.vis.ui.widget.VisTable
 import com.kotcrab.vis.ui.widget.VisTextButton
 import com.mbrlabs.mundus.editor.Mundus
 import com.mbrlabs.mundus.editor.assets.AssetAlreadyExistsException
 import com.mbrlabs.mundus.editor.core.project.ProjectManager
 import com.mbrlabs.mundus.editor.events.AssetImportEvent
+import com.mbrlabs.mundus.editor.events.FilesDroppedEvent
 import com.mbrlabs.mundus.editor.ui.UI
 import com.mbrlabs.mundus.editor.ui.modules.dialogs.BaseDialog
 import com.mbrlabs.mundus.editor.ui.widgets.ImageChooserField
+import com.mbrlabs.mundus.editor.ui.widgets.ImageChooserField.validateImageFile
 import com.mbrlabs.mundus.editor.utils.Log
 import com.mbrlabs.mundus.editor.utils.isImage
+import java.io.File
 import java.io.IOException
 
 /**
  * @author Marcus Brummer
  * @version 07-06-2016
  */
-class ImportTextureDialog : BaseDialog("Import Texture"), Disposable {
+class ImportTextureDialog : BaseDialog("Import Texture"), FilesDroppedEvent.FilesDroppedListener, ImageChooserField.ImageChosenListener, Disposable {
 
     companion object {
         private val TAG = ImportTextureDialog::class.java.simpleName
@@ -49,13 +55,17 @@ class ImportTextureDialog : BaseDialog("Import Texture"), Disposable {
     private val projectManager: ProjectManager = Mundus.inject()
 
     init {
+        Mundus.registerEventListener(this)
+
         isModal = true
         isMovable = true
 
         val root = VisTable()
         add<Table>(root).expand().fill()
-        importTextureTable = ImportTextureTable()
+        importTextureTable = ImportTextureTable(this)
 
+        root.add("Drag and drop import is supported.").align(Align.center).row()
+        root.add("Preview Mode only supported for single texture selection.").align(Align.center).row()
         root.add(importTextureTable).minWidth(300f).expand().fill().left().top()
     }
 
@@ -71,10 +81,10 @@ class ImportTextureDialog : BaseDialog("Import Texture"), Disposable {
     /**
 
      */
-    private inner class ImportTextureTable : VisTable(), Disposable {
+    private inner class ImportTextureTable(listener: ImageChooserField.ImageChosenListener) : VisTable(), Disposable {
         // UI elements
         private val importBtn = VisTextButton("IMPORT")
-        private val imageChooserField = ImageChooserField(300)
+        private val imageChooserField = ImageChooserField(300, true, listener)
 
         init {
             this.setupUI()
@@ -115,6 +125,10 @@ class ImportTextureDialog : BaseDialog("Import Texture"), Disposable {
             })
         }
 
+        fun getImageChooserField(): ImageChooserField {
+            return imageChooserField
+        }
+
         fun removeTexture() {
             imageChooserField.removeImage()
         }
@@ -124,4 +138,80 @@ class ImportTextureDialog : BaseDialog("Import Texture"), Disposable {
         }
     }
 
+    override fun onFilesDropped(event: FilesDroppedEvent) {
+        if (!dialogOpen) return
+        if (event.files == null || event.files.isEmpty()) return
+
+        if (event.files.size == 1) {
+            val fileHandle = FileHandle(File(event.files[0]))
+            val errorMessage = validateImageFile(fileHandle)
+
+            if (errorMessage == null) {
+                importTextureTable.getImageChooserField().setImage(fileHandle)
+            } else {
+                Dialogs.showErrorDialog(stage, errorMessage)
+            }
+            return
+        }
+
+        // <File Name, Error Message>
+        val failedFiles = HashMap<FileHandle, String>()
+        val files = Array<FileHandle>()
+
+        for (filePath in event.files) {
+            val fileHandle = FileHandle(File(filePath))
+            val errorMessage = validateImageFile(fileHandle)
+            if (errorMessage == null) {
+                files.add(fileHandle)
+            } else {
+                failedFiles[fileHandle] = errorMessage
+            }
+        }
+
+        importFiles(files, failedFiles)
+    }
+
+    private fun importFiles(files: Array<FileHandle>, failedFiles: HashMap<FileHandle, String>) {
+        for (file in files) {
+            try {
+                val assetManager = projectManager.current().assetManager
+                val asset = assetManager.createTextureAsset(file)
+                Mundus.postEvent(AssetImportEvent(asset))
+            } catch (ee: AssetAlreadyExistsException) {
+                Log.exception(TAG, ee)
+                failedFiles[file] = "There already exists a texture with the same name"
+            }
+        }
+
+        if (failedFiles.isEmpty()) {
+            close()
+            UI.toaster.success("Textures imported")
+            return
+        }
+
+        val dialogMessage = buildString {
+            append("The following could not be imported\n\n")
+            for (file in failedFiles) {
+                append(file.key.name())
+                append(" : ")
+                append(file.value)
+                append("\n")
+            }
+        }
+
+        Dialogs.showErrorDialog(stage, dialogMessage)
+        close()
+    }
+
+    override fun onImageChosen() {
+        // Unused
+    }
+
+    override fun onImagesChosen(
+        images: Array<FileHandle>,
+        failedFiles: HashMap<FileHandle, String>
+    ) {
+        importFiles(images, failedFiles)
+    }
+
 }

editor/src/main/com/mbrlabs/mundus/editor/ui/widgets/FileChooserField.java

@@ -40,8 +40,8 @@ public interface FileSelected {
 
     private FileChooser.SelectionMode mode = FileChooser.SelectionMode.FILES;
     private FileSelected fileSelected;
-    private VisTextField textField;
-    private VisTextButton fcBtn;
+    private final VisTextField textField;
+    private final VisTextButton fcBtn;
 
     private String path;
     private FileHandle fileHandle;
@@ -107,6 +107,7 @@ public void clicked(InputEvent event, float x, float y) {
                 super.clicked(event, x, y);
                 FileChooser fileChooser = UI.INSTANCE.getFileChooser();
                 fileChooser.setSelectionMode(mode);
+                fileChooser.setMultiSelectionEnabled(false);
                 fileChooser.setListener(new SingleFileChooserListener() {
                     @Override
                     protected void selected(FileHandle file) {