add TouchRegion and HandlePlacement

Author: SmartToolFactory

image/src/main/java/com/smarttoolfactory/image/transform/TouchRegion.kt

@@ -0,0 +1,24 @@
+package com.smarttoolfactory.image.transform
+
+/**
+ * Enum for detecting which section of Composable user has initially touched
+ */
+enum class TouchRegion {
+    // Corners
+    TopLeft, TopRight, BottomLeft, BottomRight,
+    // Center of each side
+    CenterLeft, CenterRight, TopCenter, BottomCenter,
+    // Touch is inside or outside of Composable
+    Inside, None
+}
+
+/**
+ * Enum class for placing handles for transform operations.
+ * * [HandlePlacement.Corner] places handles
+ * top left, top right, bottom left, and bottom right corners
+ * * [HandlePlacement.Side] places handles center of left, right, top and bottom sides
+ * * [HandlePlacement.All] places handles both corners and centers of each sides
+ */
+enum class HandlePlacement {
+    Corner, Side, All
+}