IOS7: Add GameController base class

Add a GameController base class which handles user inputs from a
controller. The input is either a pointer move or a button action.
If the input is a pointer move, make sure that the move is within
valid coordinates in the game (respecting the resolution which is
most probably lower than the view resolution).

backends/platform/ios7/ios7_game_controller.h

@@ -0,0 +1,46 @@
+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef BACKENDS_PLATFORM_IOS7_IOS7_GAME_CONTROLLER_H
+#define BACKENDS_PLATFORM_IOS7_IOS7_GAME_CONTROLLER_H
+
+#include <UIKit/UIKit.h>
+
+@class iPhoneView;
+
+@interface GameController : NSObject
+
+typedef enum {
+	kGameControllerMouseButtonLeft = 0,
+	kGameControllerMouseButtonRight,
+	kGameControllerMouseButtonMiddle,
+} GameControllerMouseButton;
+
+@property (nonatomic, readwrite, retain) iPhoneView *view;
+
+- (id)initWithView:(iPhoneView *)view;
+
+- (void)handlePointerMoveTo:(CGPoint)point;
+- (void)handleMouseButtonAction:(GameControllerMouseButton)button isPressed:(bool)pressed at:(CGPoint)point;
+
+@end
+
+#endif /* BACKENDS_PLATFORM_IOS7_IOS7_GAME_CONTROLLER_H */

backends/platform/ios7/ios7_game_controller.mm

@@ -0,0 +1,101 @@
+/* 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+// Disable symbol overrides so that we can use system headers.
+#define FORBIDDEN_SYMBOL_ALLOW_ALL
+
+#include "backends/platform/ios7/ios7_game_controller.h"
+#include "backends/platform/ios7/ios7_video.h"
+
+@interface GameController()
+@property (nonatomic, assign) BOOL firstButtonPressed;
+@property (nonatomic, assign) BOOL secondButtonPressed;
+@end
+
+@implementation GameController
+
+@synthesize view;
+
+- (id)initWithView:(iPhoneView *)view {
+	self = [super init];
+	if (self) {
+		[self setView:view];
+	}
+	_firstButtonPressed = _secondButtonPressed = NO;
+	return self;
+}
+
+- (void)handlePointerMoveTo:(CGPoint)point {
+	int x, y;
+
+	// Only set valid mouse coordinates in games
+	if (![view getMouseCoords:point eventX:&x eventY:&y]) {
+		return;
+	}
+
+	[view setPointerPosition:point];
+
+	if (_firstButtonPressed) {
+		[view addEvent:InternalEvent(kInputMouseDragged, x, y)];
+	} else if (_secondButtonPressed) {
+		[view addEvent:InternalEvent(kInputMouseSecondDragged, x, y)];
+	} else {
+		[view addEvent:InternalEvent(kInputMouseDragged, x, y)];
+	}
+}
+
+- (void)handleMouseButtonAction:(GameControllerMouseButton)button isPressed:(bool)pressed at:(CGPoint)point{
+	int x, y;
+
+	// Only set valid mouse coordinates in games
+	if (![view getMouseCoords:[view pointerPosition] eventX:&x eventY:&y]) {
+		return;
+	}
+
+	[view setPointerPosition:point];
+
+	switch (button) {
+	case kGameControllerMouseButtonLeft:
+		if (pressed) {
+			_firstButtonPressed = YES;
+			[view addEvent:InternalEvent(kInputMouseDown, x, y)];
+		} else {
+			_firstButtonPressed = NO;
+			[view addEvent:InternalEvent(kInputMouseUp, x, y)];
+		}
+		break;
+
+	case kGameControllerMouseButtonRight:
+		if (pressed) {
+			_secondButtonPressed = YES;
+			[view addEvent:InternalEvent(kInputMouseSecondDown, x, y)];
+		} else {
+			_secondButtonPressed = NO;
+			[view addEvent:InternalEvent(kInputMouseSecondUp, x, y)];
+		}
+		break;
+
+	default:
+		break;
+	}
+}
+
+@end

backends/platform/ios7/module.mk

@@ -10,7 +10,8 @@ MODULE_OBJS := \
 	ios7_video.o \
 	ios7_keyboard.o \
 	ios7_scummvm_view_controller.o \
-	ios7_app_delegate.o
+	ios7_app_delegate.o \
+	ios7_game_controller.o
 
 # We don't use rules.mk but rather manually update OBJS and MODULE_DIRS.
 MODULE_OBJS := $(addprefix $(MODULE)/, $(MODULE_OBJS))