3 files changed, 123 insertions, 7 deletions

diff --git a/engines/mads/scene_data.h b/engines/mads/scene_data.h
index 7a41bab1f8..1cd262755f 100644
--- a/engines/mads/scene_data.h
+++ b/engines/mads/scene_data.h
@@ -33,6 +33,7 @@
 #include "mads/events.h"
 #include "mads/game_data.h"
 #include "mads/messages.h"
+#include "mads/user_interface.h"
 
 namespace MADS {
 
@@ -50,12 +51,6 @@ class SpriteSlot;
 #define TEXT_DISPLAY_MAX_SIZE 40
 #define DIRTY_AREAS_SIZE (SPRITE_SLOTS_MAX_SIZE + TEXT_DISPLAY_MAX_SIZE)
 
-enum ScrCategory {
-	CAT_NONE = 0, CAT_ACTION = 1, CAT_INV_LIST = 2, CAT_INV_VOCAB = 3,
-	CAT_HOTSPOT = 4, CAT_INV_ANIM = 5, CAT_6 = 6, CAT_INV_SCROLLER = 7,
-	CAT_12 = 12
-};
-
 enum Layer {
 	LAYER_GUI = 19
 };
diff --git a/engines/mads/user_interface.cpp b/engines/mads/user_interface.cpp
index 63a0ec0a80..e6840ac01a 100644
--- a/engines/mads/user_interface.cpp
+++ b/engines/mads/user_interface.cpp
@@ -39,6 +39,8 @@ void SceneNode::load(Common::SeekableReadStream *f) {
 UserInterface::UserInterface(MADSEngine *vm) : _vm(vm) {
 	_category = CAT_NONE;
 	_screenObjectsCount = 0;
+	_inventoryTopIndex = 0;
+	_objectY = 0;
 
 	byte *pData = _vm->_screen.getBasePtr(0, MADS_SCREEN_HEIGHT - MADS_INTERFACE_HEIGHT);
 	setPixels(pData, MADS_SCREEN_WIDTH, MADS_INTERFACE_HEIGHT);
@@ -123,7 +125,105 @@ void UserInterface::setBounds(const Common::Rect &r) {
 }
 
 void UserInterface::loadElements() {
-	warning("TODO: UserInterface::loadElements");
+	Scene &scene = _vm->_game->_scene;
+	Common::Rect bounds;
+	scene._screenObjects.clear();
+
+	if (!scene._screenObjects._v832EC) {
+		for (int idx = 1; idx <= 3; ++idx) {
+			getBounds(CAT_INV_SCROLLER, idx, bounds);
+			// TODO
+		}
+	}
+}
+
+bool UserInterface::getBounds(ScrCategory category, int v, Common::Rect &bounds) {
+	Common::Rect result;
+	int heightMultiplier, widthMultiplier;
+	int leftStart, yOffset, widthAmt;
+
+	switch (category) {
+	case CAT_ACTION:
+		heightMultiplier = v / 5;
+		widthMultiplier = v / 5;
+		leftStart = 2;
+		yOffset = 3;
+		widthAmt = 32;
+		break;
+
+	case CAT_INV_LIST:
+		if (v < _inventoryTopIndex || v > (_inventoryTopIndex + 5))
+			return false;
+
+		heightMultiplier = v - _inventoryTopIndex;
+		widthMultiplier = 0;
+		leftStart = 90;
+		yOffset = 3;
+		widthAmt = 69;
+		break;
+
+	case CAT_6:
+		heightMultiplier = v;
+		widthMultiplier = 0;
+		leftStart = 2;
+		yOffset = 3;
+		widthAmt = 310;
+		break;
+
+	case CAT_INV_SCROLLER:
+		heightMultiplier = 0;
+		widthMultiplier = 73;
+		yOffset = 0;
+		widthAmt = 9;
+		leftStart = (v != 73) ? 73 : 75;
+		break;
+
+	default:
+		heightMultiplier = v;
+		widthMultiplier = 0;
+		leftStart = 240;
+		yOffset = 3;
+		widthAmt = 80;
+		break;
+	}
+
+	result.left = (widthMultiplier > 0) ? widthMultiplier * widthAmt + leftStart : leftStart;
+	result.setWidth(widthAmt);
+	result.top = heightMultiplier * 3 + yOffset;
+	result.setHeight(8);
+
+	if (category == CAT_INV_SCROLLER) {
+		switch (v) {
+		case 1:
+			// Arrow up
+			result.top = 4;
+			result.setHeight(7);
+			break;
+		case 2:
+			// Arrow down
+			result.top = 35;
+			result.setHeight(7);
+			break;
+		case 3:
+			// Scroller
+			result.top = 12;
+			result.setHeight(22);
+			break;
+		case 4:
+			// Thumb
+			result.top = _objectY + 14;
+			result.setHeight(1);
+			break;
+		default:
+			break;
+		}
+	}
+
+	return true;
+}
+
+void UserInterface::extendRect(Common::Rect &bounds) {
+	
 }
 
 } // End of namespace MADS
diff --git a/engines/mads/user_interface.h b/engines/mads/user_interface.h
index 8bd02ff6fc..b8e86bfefb 100644
--- a/engines/mads/user_interface.h
+++ b/engines/mads/user_interface.h
@@ -30,17 +30,38 @@
 
 namespace MADS {
 
+enum ScrCategory {
+	CAT_NONE = 0, CAT_ACTION = 1, CAT_INV_LIST = 2, CAT_INV_VOCAB = 3,
+	CAT_HOTSPOT = 4, CAT_INV_ANIM = 5, CAT_6 = 6, CAT_INV_SCROLLER = 7,
+	CAT_12 = 12
+};
+
 class UserInterface : public MSurface {
 private:
 	MADSEngine *_vm;
 
+	/**
+	 * Loads the elements of the user interface
+	 */
 	void loadElements();
+
+	/**
+	 * Returns the area within the user interface a given element falls
+	 */
+	bool getBounds(ScrCategory category, int invIndex, Common::Rect &bounds);
+
+	/**
+	 * Reposition a bounding rectangle to physical co-ordinates
+	 */
+	void extendRect(Common::Rect &bounds);
 public:
 	ScrCategory _category;
 	int _screenObjectsCount;
 	Common::Rect _bounds;
 	Common::Rect *_rectP;
 	MSurface _surface;
+	int _inventoryTopIndex;
+	int _objectY;
 public:
 	/**
 	* Constructor