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SDL_uikitview is just a generic view class which SDL_uikitopenglview …

…inherits from. The functionality found in this class relates to (right now) mouse/touch input support. The reason for putting it here is that if someone wanted to write a render driver for iPhone based around CoreGraphics rather than OpenGL ES, they could make their Core Graphics view inherit from this class as well.
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Holmes Futrell committed Jul 17, 2008
1 parent 137132e commit 531edeb4fecbf612383f2a5185f4612c1126eddd
Showing with 134 additions and 0 deletions.
  1. +26 −0 src/video/uikit/SDL_uikitview.h
  2. +108 −0 src/video/uikit/SDL_uikitview.m
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//
// SDL_uikitview.h
// iPodSDL
//
// Created by Holmes Futrell on 6/23/08.
// Copyright 2008 __MyCompanyName__. All rights reserved.
//

#import <UIKit/UIKit.h>
#include "SDL_stdinc.h"
#include "SDL_mouse.h"
#include "SDL_mouse_c.h"
#include "SDL_events.h"

#define MAX_SIMULTANEOUS_TOUCHES 5

@interface SDL_uikitview : UIView {

SDL_Mouse mice[MAX_SIMULTANEOUS_TOUCHES];

}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;

@end
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//
// SDL_uikitview.m
// iPodSDL
//
// Created by Holmes Futrell on 6/23/08.
// Copyright 2008 __MyCompanyName__. All rights reserved.
//

#import "SDL_uikitview.h"

@implementation SDL_uikitview

- (void)dealloc {
[super dealloc];
}

- (id)initWithFrame:(CGRect)frame {

self = [super initWithFrame: frame];

int i;
for (i=0; i<MAX_SIMULTANEOUS_TOUCHES; i++) {
mice[i].driverdata = NULL;
SDL_AddMouse(&(mice[i]), i);
}
self.multipleTouchEnabled = YES;

return self;

}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

NSEnumerator *enumerator = [touches objectEnumerator];
UITouch *touch=(UITouch*)[enumerator nextObject];

// associate touches with mice, so long as we have slots
int i;
int found = 0;
for(i=0; touch && i < MAX_SIMULTANEOUS_TOUCHES; i++) {

// check if this mouse is already tracking a touch
if (mice[i].driverdata != NULL) {
continue;
}

found = 1;

int oldMouse = SDL_SelectMouse(-1);
SDL_SelectMouse(i);
CGPoint locationInView = [touch locationInView: self];
mice[i].driverdata = [touch retain];
SDL_SendMouseMotion(i, 0, locationInView.x, locationInView.y);
SDL_SendMouseButton(i, SDL_PRESSED, SDL_BUTTON_LEFT);
SDL_GetRelativeMouseState(NULL, NULL);
touch = (UITouch*)[enumerator nextObject];

SDL_SelectMouse(oldMouse);

}
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {

NSEnumerator *enumerator = [touches objectEnumerator];
UITouch *touch=nil;

while(touch = (UITouch *)[enumerator nextObject]) {
int i, found = NO;
for (i=0; i<MAX_SIMULTANEOUS_TOUCHES && !found; i++) {
if (mice[i].driverdata == touch) {
[(UITouch*)(mice[i].driverdata) release];
mice[i].driverdata = NULL;
SDL_SendMouseButton(i, SDL_RELEASED, SDL_BUTTON_LEFT);

found = YES;
}
}
}
}

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
/*
this can happen if the user puts more than 5 touches on the screen
at once, or perhaps in other circumstances. Usually all active
touches are canceled.
*/
[self touchesEnded: touches withEvent: event];
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {

NSEnumerator *enumerator = [touches objectEnumerator];
UITouch *touch=nil;

while(touch = (UITouch *)[enumerator nextObject]) {
int i, found = NO;
for (i=0; i<MAX_SIMULTANEOUS_TOUCHES && !found; i++) {
if (mice[i].driverdata == touch) {
CGPoint locationInView = [touch locationInView: self];
SDL_SendMouseMotion(i, 0, locationInView.x, locationInView.y);
found = YES;
}
}
}
}

@end

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