PEGASUS: Add the ItemDragger classes

scummvm · Sep 28, 2011 · af78726 · af78726
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diff --git a/engines/pegasus/items/itemdragger.cpp b/engines/pegasus/items/itemdragger.cpp
@@ -0,0 +1,188 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "pegasus/elements.h"
+#include "pegasus/hotspot.h"
+#include "pegasus/pegasus.h"
+#include "pegasus/items/itemdragger.h"
+
+namespace Pegasus {
+
+SpriteDragger::SpriteDragger() {
+	_draggingSprite = 0;
+	_limitRect = Common::Rect(-30000, -30000, 30000, 30000);
+	_slopRect = Common::Rect(-30000, -30000, 30000, 30000);
+	_dragOffset.x = 0;
+	_dragOffset.y = 0;
+	_lastHotspot = 0;
+}
+
+void SpriteDragger::setDragSprite(Sprite *newSprite) {
+	if (!isTracking())
+		_draggingSprite = newSprite;
+}
+
+void SpriteDragger::setDragConstraints(const Common::Rect &limitRect, const Common::Rect &slopRect) {
+	if (!isTracking()) {
+		_rawLimitRect = limitRect;
+		_slopRect = slopRect;
+	}
+}
+
+void SpriteDragger::getDragConstraints(Common::Rect &limitRect, Common::Rect &slopRect) const {
+	limitRect = _rawLimitRect;
+	slopRect = _slopRect;
+}
+
+void SpriteDragger::startTracking(const Input &input) {
+	if (_draggingSprite) {
+		Tracker::startTracking(input);
+
+		if (isTracking()) {
+			input.getInputLocation(_startPoint);
+			_lastRawPoint = _startRawPoint = _startPoint;
+
+			Common::Rect r;
+			_draggingSprite->getBounds(r);
+			_dragOffset.x = _startPoint.x - r.left;
+			_dragOffset.y = _startPoint.y - r.top;
+
+			_limitRect = _rawLimitRect;
+			_limitRect.left += _dragOffset.x;
+			_limitRect.top += _dragOffset.y;
+			_limitRect.right -= r.width() - _dragOffset.x;
+			_limitRect.bottom -= r.height() - _dragOffset.y;
+			pinPointInRect(_limitRect, _startPoint);
+
+			_lastPoint = _startPoint;
+			if (_startPoint != _startRawPoint) {
+				Common::Point pt = _startPoint - _dragOffset;
+				_draggingSprite->moveElementTo(pt.x, pt.y);
+			}
+
+			_lastHotspot = g_allHotspots.findHotspot(_lastRawPoint);
+			if (_lastHotspot)
+				enterHotspot(_lastHotspot);
+		}
+	}
+}
+
+void SpriteDragger::continueTracking(const Input &input) {	
+	if (_draggingSprite) {
+		Common::Point rawPoint;
+		input.getInputLocation(rawPoint);
+
+		if (!_slopRect.contains(rawPoint))
+			rawPoint = _startRawPoint;
+
+		if (rawPoint != _lastRawPoint) {
+			Common::Point newPoint = rawPoint;
+			pinPointInRect(_limitRect, newPoint);
+			newPoint -= _dragOffset;
+
+			if (newPoint != _lastPoint) {
+				_draggingSprite->moveElementTo(newPoint.x, newPoint.y);
+				_lastPoint = newPoint;
+			}
+
+			Hotspot *newHotspot = g_allHotspots.findHotspot(rawPoint);
+			if (newHotspot != _lastHotspot) {
+				if (_lastHotspot)
+					exitHotspot(_lastHotspot);
+				if (newHotspot)
+					enterHotspot(newHotspot);
+				_lastHotspot = newHotspot;
+			}
+
+			_lastRawPoint = rawPoint;
+		}
+	}
+}
+
+void SpriteDragger::pinPointInRect(const Common::Rect &r, Common::Point &pt) {
+	pt.x = CLIP<int>(pt.x, r.left, r.right - 1);
+	pt.y = CLIP<int>(pt.y, r.top, r.bottom - 1);
+}
+
+ItemDragger::ItemDragger(PegasusEngine *owner) : _inventoryDropSpot(kInventoryDropSpotID), _biochipDropSpot(kBiochipDropSpotID),
+		_inventoryHighlight(kInventoryDropHighlightID), _biochipHighlight(kBiochipDropHighlightID) {	
+	_owner = owner;
+
+	_inventoryHighlight.setBounds(Common::Rect(76, 334, 172, 430));
+	_biochipHighlight.setBounds(Common::Rect(364, 334, 460, 430));
+
+	Common::Rect r(kInventoryDropLeft, kInventoryDropTop, kInventoryDropRight, kInventoryDropBottom);
+	_inventoryDropSpot.setArea(r);
+	_inventoryDropSpot.setHotspotFlags(kDropItemSpotFlag);
+	g_allHotspots.push_back(&_inventoryDropSpot);
+
+	r = Common::Rect(kBiochipDropLeft, kBiochipDropTop, kBiochipDropRight, kBiochipDropBottom);
+	_biochipDropSpot.setArea(r);
+	_biochipDropSpot.setHotspotFlags(kDropBiochipSpotFlag);
+	g_allHotspots.push_back(&_biochipDropSpot);
+}
+
+void ItemDragger::startTracking(const Input &input) {
+	_inventoryHighlight.setDisplayOrder(kInventoryHiliteOrder);
+	_inventoryHighlight.startDisplaying();
+
+	_biochipHighlight.setDisplayOrder(kBiochipHiliteOrder);
+	_biochipHighlight.startDisplaying();
+
+	SpriteDragger::startTracking(input);
+}
+
+void ItemDragger::stopTracking(const Input &input) {
+	SpriteDragger::stopTracking(input);
+	_inventoryHighlight.hide();
+	_biochipHighlight.hide();
+	_inventoryHighlight.stopDisplaying();
+	_biochipHighlight.stopDisplaying();
+	_owner->dragTerminated(input);
+}
+
+bool ItemDragger::stopTrackingInput(const Input &input) {
+	return !JMPPPInput::isDraggingInput(input);
+}
+
+void ItemDragger::enterHotspot(Hotspot *spot) {
+	if (spot->getObjectID() == kInventoryDropSpotID)
+		_inventoryHighlight.show();
+	else if (spot->getObjectID() == kBiochipDropSpotID)
+		_biochipHighlight.show();
+	else if ((spot->getHotspotFlags() & kDropItemSpotFlag) != 0)
+		_draggingSprite->setCurrentFrameIndex(1);
+}
+
+void ItemDragger::exitHotspot(Hotspot *spot) {
+	if (spot->getObjectID() == kInventoryDropSpotID)
+		_inventoryHighlight.hide();
+	else if (spot->getObjectID() == kBiochipDropSpotID)
+		_biochipHighlight.hide();
+	else if ((spot->getHotspotFlags() & kDropItemSpotFlag) != 0)
+		_draggingSprite->setCurrentFrameIndex(0);
+}
+
+} // End of namespace Pegasus
diff --git a/engines/pegasus/items/itemdragger.h b/engines/pegasus/items/itemdragger.h
@@ -0,0 +1,94 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * Additional copyright for this file:
+ * Copyright (C) 1995-1997 Presto Studios, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef PEGASUS_ITEMS_ITEMDRAGGER_H
+#define PEGASUS_ITEMS_ITEMDRAGGER_H
+
+#include "pegasus/input.h"
+
+namespace Pegasus {
+
+// TODO: Merge SpriteDragger and ItemDragger
+
+class Hotspot;
+class Sprite;
+
+class SpriteDragger : public Tracker {
+public:
+	SpriteDragger();
+	virtual ~SpriteDragger() {}
+
+	void setDragSprite(Sprite *);
+	Sprite *getDragSprite() { return _draggingSprite; }
+
+	void setDragConstraints(const Common::Rect &, const Common::Rect &);
+	void getDragConstraints(Common::Rect &, Common::Rect &) const;
+
+	void startTracking(const Input &);
+	void continueTracking(const Input&);
+
+	Hotspot *getLastHotspot() const { return _lastHotspot; }
+
+protected:
+	virtual void enterHotspot(Hotspot *) {}
+	virtual void exitHotspot(Hotspot *) {}
+
+	Sprite *_draggingSprite;
+	Common::Point _startPoint, _lastPoint, _dragOffset;
+	Common::Point _startRawPoint, _lastRawPoint;
+	Common::Rect _rawLimitRect;
+	Common::Rect _limitRect;
+	Common::Rect _slopRect;
+	Hotspot *_lastHotspot;
+
+	// This is a replica of QuickDraw's PinPointInRect function
+	void pinPointInRect(const Common::Rect &, Common::Point &);
+};
+
+class PegasusEngine;
+
+class ItemDragger : public SpriteDragger {
+public:
+	ItemDragger(PegasusEngine *);
+	virtual ~ItemDragger() {}
+
+	void startTracking(const Input &);
+	void stopTracking(const Input &);
+	bool stopTrackingInput(const Input &);
+
+protected:
+	virtual void enterHotspot(Hotspot *);
+	virtual void exitHotspot(Hotspot *);
+
+	PegasusEngine *_owner;
+	DropHighlight _inventoryHighlight;
+	Hotspot _inventoryDropSpot;
+	DropHighlight _biochipHighlight;
+	Hotspot _biochipDropSpot;
+};
+
+} // End of namespace Pegasus
+
+#endif
diff --git a/engines/pegasus/module.mk b/engines/pegasus/module.mk
@@ -29,6 +29,7 @@ MODULE_OBJS = \
 	items/inventory.o \
 	items/inventorypicture.o \
 	items/item.o \
+	items/itemdragger.o \
 	items/itemlist.o \
 	items/biochips/aichip.o \
 	items/biochips/biochipitem.o \

diff --git a/engines/pegasus/pegasus.h b/engines/pegasus/pegasus.h
@@ -150,6 +150,7 @@ friend class InputHandler;
 	void dragItem(const Input &, Item *, tDragType);
 	tDragType getDragType() const { return (tDragType)0; } // TODO
 	Item *getDraggingItem() const { return 0; } // TODO
+	void dragTerminated(const Input &) {} // TODO
 
 	// Save/Load
 	void makeContinuePoint();