author | Sam Lantinga <slouken@libsdl.org> |
Sat, 21 Aug 2004 12:38:50 +0000 | |
changeset 943 | 715c32d8f26c |
parent 769 | b8d311d90021 |
child 1123 | 28ac87a38c17 |
permissions | -rw-r--r-- |
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/* |
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SDL - Simple DirectMedia Layer |
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Updated copyright information for 2004 (Happy New Year!)
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Copyright (C) 1997-2004 Sam Lantinga |
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This library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Library General Public |
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License as published by the Free Software Foundation; either |
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version 2 of the License, or (at your option) any later version. |
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Library General Public License for more details. |
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You should have received a copy of the GNU Library General Public |
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License along with this library; if not, write to the Free |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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Sam Lantinga |
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Updated the source with the correct e-mail address
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slouken@libsdl.org |
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*/ |
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#ifdef SAVE_RCSID |
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static char rcsid = |
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"@(#) $Id$"; |
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#endif |
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/* General mouse handling code for SDL */ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include "SDL_events.h" |
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#include "SDL_events_c.h" |
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#include "SDL_cursor_c.h" |
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#include "SDL_sysvideo.h" |
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/* These are static for our mouse handling code */ |
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static Sint16 SDL_MouseX = -1; |
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static Sint16 SDL_MouseY = -1; |
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static Sint16 SDL_DeltaX = 0; |
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static Sint16 SDL_DeltaY = 0; |
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static Uint8 SDL_ButtonState = 0; |
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/* Public functions */ |
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int SDL_MouseInit(void) |
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{ |
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/* The mouse is at (0,0) */ |
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SDL_MouseX = -1; |
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Date: Sun, 18 Jul 2004 00:22:07 -0400
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SDL_MouseY = -1; |
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SDL_DeltaX = 0; |
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SDL_DeltaY = 0; |
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SDL_ButtonState = 0; |
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/* That's it! */ |
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return(0); |
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} |
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Reset mouse state when changing video modes
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/* We lost the mouse, so post button up messages for all pressed buttons */ |
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void SDL_ResetMouse(void) |
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Reset mouse state when changing video modes
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{ |
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Uint8 i; |
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for ( i = 0; i < sizeof(SDL_ButtonState)*8; ++i ) { |
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if ( SDL_ButtonState & SDL_BUTTON(i) ) { |
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SDL_PrivateMouseButton(SDL_RELEASED, i, 0, 0); |
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} |
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Reset mouse state when changing video modes
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} |
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Reset mouse state when changing video modes
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} |
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Reset mouse state when changing video modes
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Uint8 SDL_GetMouseState (int *x, int *y) |
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{ |
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if ( x ) { |
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Date: Sun, 18 Jul 2004 00:22:07 -0400
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if ( SDL_MouseX < 0 ) { |
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*x = 0; |
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Date: Sun, 18 Jul 2004 00:22:07 -0400
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} else { |
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Date: Sun, 18 Jul 2004 00:22:07 -0400
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*x = SDL_MouseX; |
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} |
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Date: Sun, 18 Jul 2004 00:22:07 -0400
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} |
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Date: Sun, 18 Jul 2004 00:22:07 -0400
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if ( y ) { |
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Date: Sun, 18 Jul 2004 00:22:07 -0400
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if ( SDL_MouseY < 0 ) { |
715c32d8f26c
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*y = 0; |
715c32d8f26c
Date: Sun, 18 Jul 2004 00:22:07 -0400
Sam Lantinga <slouken@libsdl.org>
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} else { |
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Date: Sun, 18 Jul 2004 00:22:07 -0400
Sam Lantinga <slouken@libsdl.org>
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*y = SDL_MouseY; |
715c32d8f26c
Date: Sun, 18 Jul 2004 00:22:07 -0400
Sam Lantinga <slouken@libsdl.org>
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} |
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Date: Sun, 18 Jul 2004 00:22:07 -0400
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} |
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return(SDL_ButtonState); |
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} |
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Uint8 SDL_GetRelativeMouseState (int *x, int *y) |
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{ |
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if ( x ) |
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*x = SDL_DeltaX; |
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if ( y ) |
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*y = SDL_DeltaY; |
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SDL_DeltaX = 0; |
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SDL_DeltaY = 0; |
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return(SDL_ButtonState); |
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} |
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static void ClipOffset(Sint16 *x, Sint16 *y) |
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{ |
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/* This clips absolute mouse coordinates when the apparent |
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display surface is smaller than the real display surface. |
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*/ |
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if ( SDL_VideoSurface->offset ) { |
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*y -= SDL_VideoSurface->offset/SDL_VideoSurface->pitch; |
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*x -= (SDL_VideoSurface->offset%SDL_VideoSurface->pitch)/ |
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SDL_VideoSurface->format->BytesPerPixel; |
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} |
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} |
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/* These are global for SDL_eventloop.c */ |
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int SDL_PrivateMouseMotion(Uint8 buttonstate, int relative, Sint16 x, Sint16 y) |
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{ |
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int posted; |
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Uint16 X, Y; |
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Sint16 Xrel; |
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Sint16 Yrel; |
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/* Don't handle mouse motion if there's no cursor surface */ |
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if ( SDL_VideoSurface == NULL ) { |
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return(0); |
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} |
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/* Default buttonstate is the current one */ |
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if ( ! buttonstate ) { |
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buttonstate = SDL_ButtonState; |
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} |
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Xrel = x; |
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Yrel = y; |
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if ( relative ) { |
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/* Push the cursor around */ |
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x = (SDL_MouseX+x); |
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y = (SDL_MouseY+y); |
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} else { |
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/* Do we need to clip {x,y} ? */ |
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ClipOffset(&x, &y); |
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} |
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/* Mouse coordinates range from 0 - width-1 and 0 - height-1 */ |
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if ( x < 0 ) |
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X = 0; |
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else |
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if ( x >= SDL_VideoSurface->w ) |
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X = SDL_VideoSurface->w-1; |
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else |
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X = (Uint16)x; |
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if ( y < 0 ) |
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Y = 0; |
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else |
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if ( y >= SDL_VideoSurface->h ) |
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Y = SDL_VideoSurface->h-1; |
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else |
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Y = (Uint16)y; |
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/* If not relative mode, generate relative motion from clamped X/Y. |
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This prevents lots of extraneous large delta relative motion when |
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the screen is windowed mode and the mouse is outside the window. |
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*/ |
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Date: Sun, 18 Jul 2004 00:22:07 -0400
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if ( ! relative && SDL_MouseX >= 0 && SDL_MouseY >= 0 ) { |
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Xrel = X-SDL_MouseX; |
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Yrel = Y-SDL_MouseY; |
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} |
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/* Update internal mouse state */ |
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SDL_ButtonState = buttonstate; |
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SDL_MouseX = X; |
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SDL_MouseY = Y; |
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SDL_DeltaX += Xrel; |
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SDL_DeltaY += Yrel; |
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SDL_MoveCursor(SDL_MouseX, SDL_MouseY); |
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/* Post the event, if desired */ |
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posted = 0; |
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if ( SDL_ProcessEvents[SDL_MOUSEMOTION] == SDL_ENABLE ) { |
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SDL_Event event; |
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memset(&event, 0, sizeof(event)); |
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event.type = SDL_MOUSEMOTION; |
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event.motion.state = buttonstate; |
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event.motion.x = X; |
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event.motion.y = Y; |
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event.motion.xrel = Xrel; |
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event.motion.yrel = Yrel; |
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if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { |
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posted = 1; |
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SDL_PushEvent(&event); |
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} |
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} |
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return(posted); |
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} |
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int SDL_PrivateMouseButton(Uint8 state, Uint8 button, Sint16 x, Sint16 y) |
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{ |
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SDL_Event event; |
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int posted; |
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int move_mouse; |
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Uint8 buttonstate; |
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memset(&event, 0, sizeof(event)); |
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/* Check parameters */ |
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if ( x || y ) { |
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ClipOffset(&x, &y); |
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move_mouse = 1; |
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/* Mouse coordinates range from 0 - width-1 and 0 - height-1 */ |
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if ( x < 0 ) |
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x = 0; |
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else |
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if ( x >= SDL_VideoSurface->w ) |
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x = SDL_VideoSurface->w-1; |
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if ( y < 0 ) |
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y = 0; |
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else |
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if ( y >= SDL_VideoSurface->h ) |
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y = SDL_VideoSurface->h-1; |
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} else { |
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move_mouse = 0; |
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} |
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if ( ! x ) |
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x = SDL_MouseX; |
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if ( ! y ) |
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y = SDL_MouseY; |
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/* Figure out which event to perform */ |
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buttonstate = SDL_ButtonState; |
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switch ( state ) { |
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case SDL_PRESSED: |
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event.type = SDL_MOUSEBUTTONDOWN; |
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buttonstate |= SDL_BUTTON(button); |
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break; |
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case SDL_RELEASED: |
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event.type = SDL_MOUSEBUTTONUP; |
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buttonstate &= ~SDL_BUTTON(button); |
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break; |
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default: |
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/* Invalid state -- bail */ |
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return(0); |
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} |
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/* Update internal mouse state */ |
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SDL_ButtonState = buttonstate; |
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if ( move_mouse ) { |
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SDL_MouseX = x; |
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SDL_MouseY = y; |
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SDL_MoveCursor(SDL_MouseX, SDL_MouseY); |
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} |
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/* Post the event, if desired */ |
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posted = 0; |
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if ( SDL_ProcessEvents[event.type] == SDL_ENABLE ) { |
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event.button.state = state; |
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event.button.button = button; |
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event.button.x = x; |
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event.button.y = y; |
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if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { |
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posted = 1; |
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SDL_PushEvent(&event); |
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} |
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} |
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return(posted); |
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} |
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