Allow initializing ParticleParameters with a single value that will t…

…hen be assigned as both min and max value.

Fix SpritesheetImportPanel size so that the content is no longer cropped out.
Fixed the spritesheet preview for non whole-numbered scaling ratios.

src/de/gurkenlabs/litiengine/graphics/emitters/xml/ParticleParameter.java

@@ -20,6 +20,11 @@ public class ParticleParameter implements Serializable {
   public ParticleParameter() {
   }
 
+  public ParticleParameter(final float value) {
+    this.setMinValue(value);
+    this.setMaxValue(value);
+  }
+
   public ParticleParameter(final float minValue, final float maxValue) {
     this.setMinValue(minValue);
     this.setMaxValue(maxValue);

utiliti/src/de/gurkenlabs/utiliti/swing/dialogs/SpritesheetImportPanel.java

@@ -95,8 +95,8 @@ public SpritesheetImportPanel(SpritesheetResource... infos) {
   public SpritesheetImportPanel() {
     this.controller = new AnimationController();
     fileListModel = new DefaultListModel<>();
-    setPreferredSize(new Dimension(454, 392));
-    setLayout(new BorderLayout(0, 0));
+    setPreferredSize(new Dimension(500, 400));
+    setLayout(new BorderLayout(10, 10));
 
     fileList = new JList<>();
     fileList.setCellRenderer(new DefaultListCellRenderer() {
@@ -323,11 +323,11 @@ private void updatePreview(SpriteFileWrapper file) {
       this.labelImage.setIcon(file.getIcon());
       this.controller.getAll().clear();
 
-      int factor = PREVIEW_SIZE / Math.max(file.getSpriteWidth(), file.getSpriteHeight());
+      double factor = (double) PREVIEW_SIZE / Math.max(file.getSpriteWidth(), file.getSpriteHeight());
 
       BufferedImage img = Imaging.scale(file.getImage(), factor, true);
 
-      Spritesheet sprite = new Spritesheet(img, file.getName() + "-preview", file.getSpriteWidth() * factor, file.getSpriteHeight() * factor);
+      Spritesheet sprite = new Spritesheet(img, file.getName() + "-preview", (int) (file.getSpriteWidth() * factor), (int) (file.getSpriteHeight() * factor));
       Animation newAnim = new Animation(sprite, true, file.keyFrames);
 
       this.controller.setDefault(newAnim);