RISCOS: Add Drag and Drop support

backends/events/riscossdl/riscossdl-events.cpp

@@ -0,0 +1,67 @@
+/* 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.
+ *
+ * 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 "common/scummsys.h"
+
+#if defined(RISCOS) && defined(SDL_BACKEND)
+
+#include "backends/events/riscossdl/riscossdl-events.h"
+#include "backends/platform/sdl/riscos/riscos-utils.h"
+
+#include "common/events.h"
+
+#include <swis.h>
+
+RISCOSSdlEventSource::RISCOSSdlEventSource()
+    : SdlEventSource() {
+	int messages[2];
+	messages[0] = 3; // Message_DataLoad
+	messages[1] = 0;
+	_swix(Wimp_AddMessages, _IN(0), messages);
+
+	SDL_EventState(SDL_SYSWMEVENT, SDL_ENABLE);
+}
+
+bool RISCOSSdlEventSource::handleSysWMEvent(SDL_Event &ev, Common::Event &event) {
+	int eventCode = ev.syswm.msg->eventCode;
+	int pollBlock[64];
+	memcpy(pollBlock, ev.syswm.msg->pollBlock, 64 * sizeof(int));
+
+	if (eventCode == 17 || eventCode == 18) {
+		char *filename;
+		switch (pollBlock[4]) {
+		case 3: // Message_DataLoad
+			filename = (char *)(pollBlock) + 44;
+			event.type = Common::EVENT_DROP_FILE;
+			event.path = RISCOS_Utils::toUnix(Common::String(filename));
+
+			// Acknowledge that the event has been received
+			pollBlock[4] = 4; // Message_DataLoadAck
+			pollBlock[3] = pollBlock[2];
+			_swix(Wimp_SendMessage, _INR(0,2), 19, pollBlock, 0);
+			return true;
+		}
+	}
+	return false;
+}
+
+#endif

backends/events/riscossdl/riscossdl-events.h

@@ -0,0 +1,38 @@
+/* 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.
+ *
+ * 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.
+ *
+ */
+
+#if !defined(BACKEND_EVENTS_RISCOS_H) && !defined(DISABLE_DEFAULT_EVENTMANAGER)
+#define BACKEND_EVENTS_RISCOS_H
+
+#include "backends/events/sdl/sdl-events.h"
+
+/**
+ * SDL Events manager for RISC OS.
+ */
+class RISCOSSdlEventSource : public SdlEventSource {
+public:
+	RISCOSSdlEventSource();
+protected:
+	bool handleSysWMEvent(SDL_Event &ev, Common::Event &event) override;
+};
+
+#endif /* BACKEND_EVENTS_RISCOS_H */

backends/events/sdl/sdl-events.cpp

@@ -567,6 +567,8 @@ bool SdlEventSource::dispatchSDLEvent(SDL_Event &ev, Common::Event &event) {
 		return handleMouseButtonDown(ev, event);
 	case SDL_MOUSEBUTTONUP:
 		return handleMouseButtonUp(ev, event);
+	case SDL_SYSWMEVENT:
+		return handleSysWMEvent(ev, event);
 
 #if SDL_VERSION_ATLEAST(2, 0, 0)
 	case SDL_MOUSEWHEEL: {
@@ -860,6 +862,10 @@ bool SdlEventSource::handleMouseButtonUp(SDL_Event &ev, Common::Event &event) {
 	return processMouseEvent(event, ev.button.x, ev.button.y);
 }
 
+bool SdlEventSource::handleSysWMEvent(SDL_Event &ev, Common::Event &event) {
+	return false;
+}
+
 void SdlEventSource::openJoystick(int joystickIndex) {
 	if (SDL_NumJoysticks() > joystickIndex) {
 #if SDL_VERSION_ATLEAST(2, 0, 0)

backends/events/sdl/sdl-events.h

@@ -137,6 +137,7 @@ protected:
 	virtual bool handleMouseMotion(SDL_Event &ev, Common::Event &event);
 	virtual bool handleMouseButtonDown(SDL_Event &ev, Common::Event &event);
 	virtual bool handleMouseButtonUp(SDL_Event &ev, Common::Event &event);
+	virtual bool handleSysWMEvent(SDL_Event &ev, Common::Event &event);
 	virtual bool handleJoyButtonDown(SDL_Event &ev, Common::Event &event);
 	virtual bool handleJoyButtonUp(SDL_Event &ev, Common::Event &event);
 	virtual bool handleJoyAxisMotion(SDL_Event &ev, Common::Event &event);

backends/module.mk

@@ -219,6 +219,7 @@ endif
 
 ifdef RISCOS
 MODULE_OBJS += \
+	events/riscossdl/riscossdl-events.o \
 	fs/riscos/riscos-fs.o \
 	fs/riscos/riscos-fs-factory.o \
 	platform/sdl/riscos/riscos-utils.o

backends/platform/sdl/riscos/riscos.cpp

@@ -26,6 +26,7 @@
 
 #include "backends/platform/sdl/riscos/riscos.h"
 #include "backends/saves/default/default-saves.h"
+#include "backends/events/riscossdl/riscossdl-events.h"
 #include "backends/fs/riscos/riscos-fs-factory.h"
 #include "backends/fs/riscos/riscos-fs.h"
 
@@ -51,6 +52,10 @@ void OSystem_RISCOS::init() {
 void OSystem_RISCOS::initBackend() {
 	ConfMan.registerDefault("enable_reporter", false);
 
+	// Create the events manager
+	if (_eventSource == 0)
+		_eventSource = new RISCOSSdlEventSource();
+
 	// Create the savefile manager
 	if (_savefileManager == 0) {
 		Common::String savePath = "/<Choices$Write>/ScummVM/Saves";