src/video/cocoa/SDL_cocoamouse.m
author Sam Lantinga <slouken@libsdl.org>
Sat, 22 Feb 2014 14:57:12 -0800
changeset 8232 8976fb30952f
parent 8149 681eb46b8ac4
child 8260 028ed8da2524
permissions -rw-r--r--
Fixed bug 2346 - Mac: mousewheel events have flipped horizontal scroll values Alex Szpakowski On my Mac OS X system (10.9.1), the SDL_MOUSEWHEEL event reports negative X values when my trackpad scrolls to the right, and positive X values when my trackpad scrolls to the left. This is backwards from what I'd expect, and I don't think it matches the Windows wheel events. The vertical scroll values are what I'd expect though, and are consistent what gets reported on Windows (positive Y for scrolling up, negative Y for scrolling down.) This is with "scroll direction: natural" disabled in the OS X trackpad settings (i.e. my scroll direction in non-SDL OS X programs matches what happens in Windows and Linux.) I also tested with the horizontal scroll on a real mouse (Logitech G500 without custom drivers), and the horizontal scroll values in SDL are still flipped. I "solved" the issue for myself by changing this line in the Cocoa_HandleMouseWheel function: float x = [event deltaX]; to this: float x = -[event deltaX]; I believe it should work fine with that change - I found something similar in another codebase while looking online for my issue - but I haven't tested on anything below Mac OS 10.8.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2014 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_COCOA
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#include "SDL_assert.h"
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#include "SDL_events.h"
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#include "SDL_cocoamouse.h"
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#include "SDL_cocoamousetap.h"
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#include "../../events/SDL_mouse_c.h"
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@implementation NSCursor (InvisibleCursor)
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+ (NSCursor *)invisibleCursor
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{
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    static NSCursor *invisibleCursor = NULL;
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    if (!invisibleCursor) {
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        /* RAW 16x16 transparent GIF */
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        static unsigned char cursorBytes[] = {
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            0x47, 0x49, 0x46, 0x38, 0x37, 0x61, 0x10, 0x00, 0x10, 0x00, 0x80,
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            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x21, 0xF9, 0x04,
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            0x01, 0x00, 0x00, 0x01, 0x00, 0x2C, 0x00, 0x00, 0x00, 0x00, 0x10,
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            0x00, 0x10, 0x00, 0x00, 0x02, 0x0E, 0x8C, 0x8F, 0xA9, 0xCB, 0xED,
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            0x0F, 0xA3, 0x9C, 0xB4, 0xDA, 0x8B, 0xB3, 0x3E, 0x05, 0x00, 0x3B
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        };
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        NSData *cursorData = [NSData dataWithBytesNoCopy:&cursorBytes[0]
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                                                  length:sizeof(cursorBytes)
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                                            freeWhenDone:NO];
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        NSImage *cursorImage = [[[NSImage alloc] initWithData:cursorData] autorelease];
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        invisibleCursor = [[NSCursor alloc] initWithImage:cursorImage
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                                                  hotSpot:NSZeroPoint];
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    }
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    return invisibleCursor;
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}
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@end
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static SDL_Cursor *
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Cocoa_CreateDefaultCursor()
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{
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    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
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    NSCursor *nscursor;
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    SDL_Cursor *cursor = NULL;
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    nscursor = [NSCursor arrowCursor];
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    if (nscursor) {
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        cursor = SDL_calloc(1, sizeof(*cursor));
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        if (cursor) {
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            cursor->driverdata = nscursor;
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            [nscursor retain];
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        }
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    }
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    [pool release];
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    return cursor;
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}
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static SDL_Cursor *
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Cocoa_CreateCursor(SDL_Surface * surface, int hot_x, int hot_y)
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{
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    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
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    NSImage *nsimage;
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    NSCursor *nscursor = NULL;
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    SDL_Cursor *cursor = NULL;
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    nsimage = Cocoa_CreateImage(surface);
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    if (nsimage) {
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        nscursor = [[NSCursor alloc] initWithImage: nsimage hotSpot: NSMakePoint(hot_x, hot_y)];
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    }
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    if (nscursor) {
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        cursor = SDL_calloc(1, sizeof(*cursor));
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        if (cursor) {
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            cursor->driverdata = nscursor;
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        } else {
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            [nscursor release];
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        }
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    }
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    [pool release];
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    return cursor;
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}
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static SDL_Cursor *
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Cocoa_CreateSystemCursor(SDL_SystemCursor id)
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   110
{
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   111
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
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   112
    NSCursor *nscursor = NULL;
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   113
    SDL_Cursor *cursor = NULL;
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   114
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   115
    switch(id)
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   116
    {
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   117
    case SDL_SYSTEM_CURSOR_ARROW:
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   118
        nscursor = [NSCursor arrowCursor];
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   119
        break;
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   120
    case SDL_SYSTEM_CURSOR_IBEAM:
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   121
        nscursor = [NSCursor IBeamCursor];
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   122
        break;
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   123
    case SDL_SYSTEM_CURSOR_WAIT:
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   124
        nscursor = [NSCursor arrowCursor];
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   125
        break;
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   126
    case SDL_SYSTEM_CURSOR_CROSSHAIR:
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   127
        nscursor = [NSCursor crosshairCursor];
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   128
        break;
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   129
    case SDL_SYSTEM_CURSOR_WAITARROW:
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   130
        nscursor = [NSCursor arrowCursor];
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   131
        break;
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   132
    case SDL_SYSTEM_CURSOR_SIZENWSE:
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   133
    case SDL_SYSTEM_CURSOR_SIZENESW:
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   134
        nscursor = [NSCursor closedHandCursor];
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   135
        break;
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   136
    case SDL_SYSTEM_CURSOR_SIZEWE:
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   137
        nscursor = [NSCursor resizeLeftRightCursor];
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   138
        break;
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   139
    case SDL_SYSTEM_CURSOR_SIZENS:
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   140
        nscursor = [NSCursor resizeUpDownCursor];
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   141
        break;
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   142
    case SDL_SYSTEM_CURSOR_SIZEALL:
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   143
        nscursor = [NSCursor closedHandCursor];
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   144
        break;
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   145
    case SDL_SYSTEM_CURSOR_NO:
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   146
        nscursor = [NSCursor operationNotAllowedCursor];
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   147
        break;
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   148
    case SDL_SYSTEM_CURSOR_HAND:
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   149
        nscursor = [NSCursor pointingHandCursor];
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   150
        break;
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   151
    default:
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   152
        SDL_assert(!"Unknown system cursor");
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   153
        return NULL;
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   154
    }
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   155
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   156
    if (nscursor) {
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   157
        cursor = SDL_calloc(1, sizeof(*cursor));
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   158
        if (cursor) {
7191
75360622e65f File style cleanup for the SDL 2.0 release
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   159
            /* We'll free it later, so retain it here */
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   160
            [nscursor retain];
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   161
            cursor->driverdata = nscursor;
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156e608ec4ef Replaced manual NSAutoreleasePool handing with @autorelease
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   162
        }
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   163
    }
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   164
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   165
    [pool release];
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   166
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   167
    return cursor;
6676
4ff261ffaa42 Added a Cocoa implementation of SDL_CreateSystemCursor()
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   168
}
4ff261ffaa42 Added a Cocoa implementation of SDL_CreateSystemCursor()
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   169
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183ec2d4485c Implemented cursor support and SDL_WarpMouseInWindow() on Mac OS X
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   170
static void
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   171
Cocoa_FreeCursor(SDL_Cursor * cursor)
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   172
{
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   173
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
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   174
    NSCursor *nscursor = (NSCursor *)cursor->driverdata;
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   175
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   176
    [nscursor release];
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   177
    SDL_free(cursor);
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   178
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   179
    [pool release];
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   180
}
183ec2d4485c Implemented cursor support and SDL_WarpMouseInWindow() on Mac OS X
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   181
183ec2d4485c Implemented cursor support and SDL_WarpMouseInWindow() on Mac OS X
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   182
static int
183ec2d4485c Implemented cursor support and SDL_WarpMouseInWindow() on Mac OS X
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   183
Cocoa_ShowCursor(SDL_Cursor * cursor)
183ec2d4485c Implemented cursor support and SDL_WarpMouseInWindow() on Mac OS X
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   184
{
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   185
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
478ecc8a58b3 Backed out use of @autorelease keyword for now, since it's not supported by older Xcode versions.
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   186
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ff52fba70795 Mac: Use cursor rects instead of NSCursor hide/unhide.
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   187
    SDL_VideoDevice *device = SDL_GetVideoDevice();
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   188
    SDL_Window *window = (device ? device->windows : NULL);
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   189
    for (; window != NULL; window = window->next) {
ff52fba70795 Mac: Use cursor rects instead of NSCursor hide/unhide.
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   190
        SDL_WindowData *driverdata = (SDL_WindowData *)window->driverdata;
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   191
        if (driverdata) {
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   192
            [driverdata->nswindow performSelectorOnMainThread:@selector(invalidateCursorRectsForView:)
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   193
                                                   withObject:[driverdata->nswindow contentView]
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   194
                                                waitUntilDone:NO];
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   195
        }
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   196
    }
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   197
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   198
    [pool release];
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   199
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   200
    return 0;
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   201
}
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   202
183ec2d4485c Implemented cursor support and SDL_WarpMouseInWindow() on Mac OS X
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   203
static void
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   204
Cocoa_WarpMouse(SDL_Window * window, int x, int y)
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   205
{
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   206
    SDL_Mouse *mouse = SDL_GetMouse();
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   207
    CGPoint point = CGPointMake(x + (float)window->x, y + (float)window->y);
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   208
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    {
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   210
        /* This makes Cocoa_HandleMouseEvent ignore this delta in the next
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   211
         * movement event.
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   212
         */
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   213
        SDL_MouseData *driverdata = (SDL_MouseData*)mouse->driverdata;
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   214
        NSPoint location =  [NSEvent mouseLocation];
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   215
        driverdata->deltaXOffset = location.x - point.x;
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   216
        driverdata->deltaYOffset = point.y - location.y;
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   217
    }
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   218
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   219
    /* According to the docs, this was deprecated in 10.6, but it's still
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   220
     * around. The substitute requires a CGEventSource, but I'm not entirely
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   221
     * sure how we'd procure the right one for this event.
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diff changeset
   222
     */
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    CGSetLocalEventsSuppressionInterval(0.0);
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    CGWarpMouseCursorPosition(point);
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    CGSetLocalEventsSuppressionInterval(0.25);
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    if (!mouse->relative_mode) {
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        /* CGWarpMouseCursorPosition doesn't generate a window event, unlike our
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         * other implementations' APIs.
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         */
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        SDL_SendMouseMotion(mouse->focus, mouse->mouseID, 0, x, y);
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    }
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}
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static int
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Cocoa_SetRelativeMouseMode(SDL_bool enabled)
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{
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    CGError result;
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    if (enabled) {
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        result = CGAssociateMouseAndMouseCursorPosition(NO);
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    } else {
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        result = CGAssociateMouseAndMouseCursorPosition(YES);
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    }
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    if (result != kCGErrorSuccess) {
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        return SDL_SetError("CGAssociateMouseAndMouseCursorPosition() failed");
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    }
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    return 0;
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}
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void
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Cocoa_InitMouse(_THIS)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    mouse->driverdata = SDL_calloc(1, sizeof(SDL_MouseData));
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    mouse->CreateCursor = Cocoa_CreateCursor;
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    mouse->CreateSystemCursor = Cocoa_CreateSystemCursor;
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    mouse->ShowCursor = Cocoa_ShowCursor;
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    mouse->FreeCursor = Cocoa_FreeCursor;
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    mouse->WarpMouse = Cocoa_WarpMouse;
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    mouse->SetRelativeMouseMode = Cocoa_SetRelativeMouseMode;
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    SDL_SetDefaultCursor(Cocoa_CreateDefaultCursor());
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    Cocoa_InitMouseEventTap(mouse->driverdata);
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}
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void
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Cocoa_HandleMouseEvent(_THIS, NSEvent *event)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    if (mouse->relative_mode &&
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        ([event type] == NSMouseMoved ||
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         [event type] == NSLeftMouseDragged ||
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         [event type] == NSRightMouseDragged ||
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         [event type] == NSOtherMouseDragged)) {
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        SDL_MouseData *driverdata = (SDL_MouseData*)mouse->driverdata;
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        float x = [event deltaX] + driverdata->deltaXOffset;
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        float y = [event deltaY] + driverdata->deltaYOffset;
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        driverdata->deltaXOffset = driverdata->deltaYOffset = 0;
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        SDL_SendMouseMotion(mouse->focus, mouse->mouseID, 1, (int)x, (int)y);
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    }
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}
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void
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Cocoa_HandleMouseWheel(SDL_Window *window, NSEvent *event)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    float x = -[event deltaX];
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    float y = [event deltaY];
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    if (x > 0) {
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        x += 0.9f;
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    } else if (x < 0) {
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        x -= 0.9f;
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    }
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    if (y > 0) {
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        y += 0.9f;
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    } else if (y < 0) {
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        y -= 0.9f;
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   306
    }
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    SDL_SendMouseWheel(window, mouse->mouseID, (int)x, (int)y);
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}
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void
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Cocoa_QuitMouse(_THIS)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    if (mouse) {
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        if (mouse->driverdata) {
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            Cocoa_QuitMouseEventTap(((SDL_MouseData*)mouse->driverdata));
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        }
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        SDL_free(mouse->driverdata);
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    }
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}
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35448a5ea044 Lots of fixes importing SDL source wholesale into a new iOS project
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#endif /* SDL_VIDEO_DRIVER_COCOA */
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/* vi: set ts=4 sw=4 expandtab: */