Scripting: Added Tileset.isCollection to replace Tileset.collection

The documentation mentioned a Tileset.isCollection property, but actually
the property was called Tileset.collection.

Fixed by adding Tileset.isCollection and deprecating Tileset.collection,
since the former matches the naming style for boolean properties.

Closes #3543

NEWS.md

@@ -7,6 +7,7 @@
 * Scripting: Allow assigning null to Tile.objectGroup (by Logan Higinbotham, #3495)
 * Scripting: Allow changing the items in a combo box added to a dialog
 * Scripting: Fixed painting issues after changing TileLayer size (#3481)
+* Scripting: Renamed Tileset.collection to Tileset.isCollection (#3543)
 * Defold plugin: Allow overriding z value also when exporting to .collection (#3214)
 * Qt 6: Fixed invisible tileset tabs when only a single tileset is open
 * Fixed positioning of point object name labels (by Logan Higinbotham, #3400)

docs/scripting-doc/index.d.ts

@@ -2968,6 +2968,15 @@ declare class Tileset extends Asset {
 
   /**
    * Whether this tileset is a collection of images (same as checking whether image is an empty string).
+   *
+   * @deprecated Use {@link isCollection} instead.
+   */
+  readonly collection : boolean
+
+  /**
+   * Whether this tileset is a collection of images (same as checking whether image is an empty string).
+   *
+   * @since 1.10
    */
   readonly isCollection : boolean
 

src/tiled/editabletileset.h

@@ -56,7 +56,8 @@ class EditableTileset : public EditableAsset
     Q_PROPERTY(Orientation orientation READ orientation WRITE setOrientation)
     Q_PROPERTY(QColor transparentColor READ transparentColor WRITE setTransparentColor)
     Q_PROPERTY(QColor backgroundColor READ backgroundColor WRITE setBackgroundColor)
-    Q_PROPERTY(bool collection READ isCollection)
+    Q_PROPERTY(bool collection READ isCollection)   // deprecated
+    Q_PROPERTY(bool isCollection READ isCollection)
     Q_PROPERTY(QList<QObject*> selectedTiles READ selectedTiles WRITE setSelectedTiles)
 
 public: