src/events/SDL_mouse.c
author Sam Lantinga <slouken@libsdl.org>
Fri, 02 Dec 2016 22:18:05 -0800
changeset 10674 120c2e96b094
parent 10673 4f02752f8d85
child 10676 5c4eaca2517a
permissions -rw-r--r--
Fixed compile warning on Visual Studio
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2016 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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/* General mouse handling code for SDL */
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#include "SDL_assert.h"
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#include "SDL_hints.h"
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#include "SDL_timer.h"
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#include "SDL_events.h"
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#include "SDL_events_c.h"
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#include "default_cursor.h"
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#include "../video/SDL_sysvideo.h"
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/* #define DEBUG_MOUSE */
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/* The mouse state */
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static SDL_Mouse SDL_mouse;
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static Uint32 SDL_double_click_time = 500;
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static int SDL_double_click_radius = 1;
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static int
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SDL_PrivateSendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relative, int x, int y);
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static void
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SDL_MouseNormalSpeedScaleChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
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{
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    SDL_Mouse *mouse = (SDL_Mouse *)userdata;
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    mouse->normal_speed_scale = (float)SDL_atof(hint);
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}
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static void
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SDL_MouseRelativeSpeedScaleChanged(void *userdata, const char *name, const char *oldValue, const char *hint)
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{
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    SDL_Mouse *mouse = (SDL_Mouse *)userdata;
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    mouse->relative_speed_scale = (float)SDL_atof(hint);
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}
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/* Public functions */
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int
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SDL_MouseInit(void)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    SDL_AddHintCallback(SDL_HINT_MOUSE_NORMAL_SPEED_SCALE,
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                        SDL_MouseNormalSpeedScaleChanged, mouse);
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    SDL_AddHintCallback(SDL_HINT_MOUSE_RELATIVE_SPEED_SCALE,
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                        SDL_MouseRelativeSpeedScaleChanged, mouse);
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    mouse->cursor_shown = SDL_TRUE;
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    return (0);
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}
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void
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SDL_SetDefaultCursor(SDL_Cursor * cursor)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    mouse->def_cursor = cursor;
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    if (!mouse->cur_cursor) {
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        SDL_SetCursor(cursor);
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    }
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}
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SDL_Mouse *
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SDL_GetMouse(void)
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{
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    return &SDL_mouse;
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}
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void
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SDL_SetDoubleClickTime(Uint32 interval)
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{
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    SDL_double_click_time = interval;
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}
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SDL_Window *
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SDL_GetMouseFocus(void)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    return mouse->focus;
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}
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#if 0
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void
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SDL_ResetMouse(void)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    Uint8 i;
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#ifdef DEBUG_MOUSE
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    printf("Resetting mouse\n");
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#endif
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    for (i = 1; i <= sizeof(mouse->buttonstate)*8; ++i) {
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        if (mouse->buttonstate & SDL_BUTTON(i)) {
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            SDL_SendMouseButton(mouse->focus, mouse->mouseID, SDL_RELEASED, i);
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        }
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    }
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    SDL_assert(mouse->buttonstate == 0);
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}
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#endif
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void
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SDL_SetMouseFocus(SDL_Window * window)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    if (mouse->focus == window) {
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        return;
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    }
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    /* Actually, this ends up being a bad idea, because most operating
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       systems have an implicit grab when you press the mouse button down
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       so you can drag things out of the window and then get the mouse up
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       when it happens.  So, #if 0...
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    */
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#if 0
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    if (mouse->focus && !window) {
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        /* We won't get anymore mouse messages, so reset mouse state */
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        SDL_ResetMouse();
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    }
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#endif
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    /* See if the current window has lost focus */
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    if (mouse->focus) {
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        SDL_SendWindowEvent(mouse->focus, SDL_WINDOWEVENT_LEAVE, 0, 0);
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    }
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    mouse->focus = window;
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    if (mouse->focus) {
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        SDL_SendWindowEvent(mouse->focus, SDL_WINDOWEVENT_ENTER, 0, 0);
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    }
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    /* Update cursor visibility */
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    SDL_SetCursor(NULL);
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}
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/* Check to see if we need to synthesize focus events */
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static SDL_bool
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SDL_UpdateMouseFocus(SDL_Window * window, int x, int y, Uint32 buttonstate)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    SDL_bool inWindow = SDL_TRUE;
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    if (window && ((window->flags & SDL_WINDOW_MOUSE_CAPTURE) == 0)) {
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        int w, h;
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        SDL_GetWindowSize(window, &w, &h);
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        if (x < 0 || y < 0 || x >= w || y >= h) {
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            inWindow = SDL_FALSE;
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        }
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    }
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/* Linux doesn't give you mouse events outside your window unless you grab
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   the pointer.
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   Windows doesn't give you mouse events outside your window unless you call
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   SetCapture().
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   Both of these are slightly scary changes, so for now we'll punt and if the
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   mouse leaves the window you'll lose mouse focus and reset button state.
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*/
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#ifdef SUPPORT_DRAG_OUTSIDE_WINDOW
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    if (!inWindow && !buttonstate) {
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#else
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    if (!inWindow) {
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#endif
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        if (window == mouse->focus) {
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#ifdef DEBUG_MOUSE
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            printf("Mouse left window, synthesizing move & focus lost event\n");
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#endif
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            SDL_PrivateSendMouseMotion(window, mouse->mouseID, 0, x, y);
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            SDL_SetMouseFocus(NULL);
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        }
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        return SDL_FALSE;
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    }
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    if (window != mouse->focus) {
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#ifdef DEBUG_MOUSE
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         printf("Mouse entered window, synthesizing focus gain & move event\n");
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#endif
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         SDL_SetMouseFocus(window);
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         SDL_PrivateSendMouseMotion(window, mouse->mouseID, 0, x, y);
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    }
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    return SDL_TRUE;
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}
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int
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SDL_SendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relative, int x, int y)
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{
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    if (window && !relative) {
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        SDL_Mouse *mouse = SDL_GetMouse();
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        if (!SDL_UpdateMouseFocus(window, x, y, mouse->buttonstate)) {
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            return 0;
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        }
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    }
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    return SDL_PrivateSendMouseMotion(window, mouseID, relative, x, y);
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}
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static int
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GetScaledMouseDelta(float scale, int value, float *accum)
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{
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    if (scale != 1.0f) {
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        *accum += scale * value;
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        if (*accum >= 0.0f) {
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            value = (int)SDL_floor(*accum);
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        } else {
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            value = (int)SDL_ceil(*accum);
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        }
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        *accum -= value;
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    }
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    return value;
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}
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static int
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SDL_PrivateSendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relative, int x, int y)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    int posted;
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    int xrel;
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    int yrel;
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    if (mouse->relative_mode_warp) {
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        int center_x = 0, center_y = 0;
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        SDL_GetWindowSize(window, &center_x, &center_y);
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        center_x /= 2;
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        center_y /= 2;
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        if (x == center_x && y == center_y) {
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            mouse->last_x = center_x;
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            mouse->last_y = center_y;
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            return 0;
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        }
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        SDL_WarpMouseInWindow(window, center_x, center_y);
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    }
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    if (relative) {
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        if (mouse->relative_mode) {
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            x = GetScaledMouseDelta(mouse->relative_speed_scale, x, &mouse->scale_accum_x);
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            y = GetScaledMouseDelta(mouse->relative_speed_scale, y, &mouse->scale_accum_y);
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        } else {
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            x = GetScaledMouseDelta(mouse->normal_speed_scale, x, &mouse->scale_accum_x);
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            y = GetScaledMouseDelta(mouse->normal_speed_scale, y, &mouse->scale_accum_y);
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        }
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        xrel = x;
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        yrel = y;
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        x = (mouse->last_x + xrel);
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        y = (mouse->last_y + yrel);
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    } else {
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        xrel = x - mouse->last_x;
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        yrel = y - mouse->last_y;
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    }
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    /* Drop events that don't change state */
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    if (!xrel && !yrel) {
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#ifdef DEBUG_MOUSE
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        printf("Mouse event didn't change state - dropped!\n");
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#endif
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        return 0;
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    }
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    /* Update internal mouse coordinates */
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    if (!mouse->relative_mode) {
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        mouse->x = x;
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        mouse->y = y;
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    } else {
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        mouse->x += xrel;
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        mouse->y += yrel;
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    }
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    /* make sure that the pointers find themselves inside the windows,
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       unless we have the mouse captured. */
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    if (window && ((window->flags & SDL_WINDOW_MOUSE_CAPTURE) == 0)) {
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        int x_max = 0, y_max = 0;
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        // !!! FIXME: shouldn't this be (window) instead of (mouse->focus)?
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        SDL_GetWindowSize(mouse->focus, &x_max, &y_max);
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        --x_max;
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        --y_max;
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        if (mouse->x > x_max) {
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            mouse->x = x_max;
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        }
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        if (mouse->x < 0) {
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            mouse->x = 0;
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        }
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        if (mouse->y > y_max) {
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            mouse->y = y_max;
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        }
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        if (mouse->y < 0) {
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            mouse->y = 0;
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        }
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    }
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    mouse->xdelta += xrel;
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    mouse->ydelta += yrel;
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    /* Move the mouse cursor, if needed */
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    if (mouse->cursor_shown && !mouse->relative_mode &&
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        mouse->MoveCursor && mouse->cur_cursor) {
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        mouse->MoveCursor(mouse->cur_cursor);
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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_GetEventState(SDL_MOUSEMOTION) == SDL_ENABLE) {
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        SDL_Event event;
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        event.motion.type = SDL_MOUSEMOTION;
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        event.motion.windowID = mouse->focus ? mouse->focus->id : 0;
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        event.motion.which = mouseID;
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        event.motion.state = mouse->buttonstate;
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        event.motion.x = mouse->x;
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        event.motion.y = mouse->y;
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        event.motion.xrel = xrel;
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        event.motion.yrel = yrel;
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        posted = (SDL_PushEvent(&event) > 0);
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    }
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    if (relative) {
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        mouse->last_x = mouse->x;
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        mouse->last_y = mouse->y;
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    } else {
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        /* Use unclamped values if we're getting events outside the window */
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        mouse->last_x = x;
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        mouse->last_y = y;
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    }
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    return posted;
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}
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static SDL_MouseClickState *GetMouseClickState(SDL_Mouse *mouse, Uint8 button)
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{
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    if (button >= mouse->num_clickstates) {
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        int i, count = button + 1;
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        SDL_MouseClickState *clickstate = (SDL_MouseClickState *)SDL_realloc(mouse->clickstate, count * sizeof(*mouse->clickstate));
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        if (!clickstate) {
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            return NULL;
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        }
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        mouse->clickstate = clickstate;
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        for (i = mouse->num_clickstates; i < count; ++i) {
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            SDL_zero(mouse->clickstate[i]);
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        }
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        mouse->num_clickstates = count;
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    }
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    return &mouse->clickstate[button];
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}
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static int
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SDL_PrivateSendMouseButton(SDL_Window * window, SDL_MouseID mouseID, Uint8 state, Uint8 button, int clicks)
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{
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    SDL_Mouse *mouse = SDL_GetMouse();
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    int posted;
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    Uint32 type;
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    Uint32 buttonstate = mouse->buttonstate;
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    /* Figure out which event to perform */
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    switch (state) {
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    case SDL_PRESSED:
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        type = SDL_MOUSEBUTTONDOWN;
slouken@6666
   383
        buttonstate |= SDL_BUTTON(button);
slouken@1895
   384
        break;
slouken@1895
   385
    case SDL_RELEASED:
slouken@1895
   386
        type = SDL_MOUSEBUTTONUP;
slouken@6666
   387
        buttonstate &= ~SDL_BUTTON(button);
slouken@1895
   388
        break;
slouken@1895
   389
    default:
slouken@1895
   390
        /* Invalid state -- bail */
slouken@1895
   391
        return 0;
slouken@1895
   392
    }
slouken@1895
   393
slouken@6666
   394
    /* We do this after calculating buttonstate so button presses gain focus */
slouken@6666
   395
    if (window && state == SDL_PRESSED) {
slouken@6666
   396
        SDL_UpdateMouseFocus(window, mouse->x, mouse->y, buttonstate);
slouken@6666
   397
    }
slouken@6666
   398
slouken@6666
   399
    if (buttonstate == mouse->buttonstate) {
slouken@6666
   400
        /* Ignore this event, no state change */
slouken@6666
   401
        return 0;
slouken@6666
   402
    }
slouken@6666
   403
    mouse->buttonstate = buttonstate;
slouken@6666
   404
slime73@10366
   405
    if (clicks < 0) {
slime73@10366
   406
        SDL_MouseClickState *clickstate = GetMouseClickState(mouse, button);
philipp@10390
   407
        if (clickstate) {
philipp@10390
   408
            if (state == SDL_PRESSED) {
philipp@10390
   409
                Uint32 now = SDL_GetTicks();
slouken@8066
   410
philipp@10390
   411
                if (SDL_TICKS_PASSED(now, clickstate->last_timestamp + SDL_double_click_time) ||
philipp@10390
   412
                    SDL_abs(mouse->x - clickstate->last_x) > SDL_double_click_radius ||
philipp@10390
   413
                    SDL_abs(mouse->y - clickstate->last_y) > SDL_double_click_radius) {
philipp@10390
   414
                    clickstate->click_count = 0;
philipp@10390
   415
                }
philipp@10390
   416
                clickstate->last_timestamp = now;
philipp@10390
   417
                clickstate->last_x = mouse->x;
philipp@10390
   418
                clickstate->last_y = mouse->y;
philipp@10390
   419
                if (clickstate->click_count < 255) {
philipp@10390
   420
                    ++clickstate->click_count;
philipp@10390
   421
                }
slouken@8066
   422
            }
philipp@10390
   423
            clicks = clickstate->click_count;
philipp@10390
   424
        } else {
philipp@10390
   425
            clicks = 1;
slouken@8066
   426
        }
slouken@8066
   427
    }
slouken@8066
   428
slouken@1895
   429
    /* Post the event, if desired */
slouken@1895
   430
    posted = 0;
slouken@4429
   431
    if (SDL_GetEventState(type) == SDL_ENABLE) {
slouken@1895
   432
        SDL_Event event;
slouken@1895
   433
        event.type = type;
slouken@6950
   434
        event.button.windowID = mouse->focus ? mouse->focus->id : 0;
slouken@6950
   435
        event.button.which = mouseID;
slouken@1895
   436
        event.button.state = state;
slouken@1895
   437
        event.button.button = button;
slime73@10366
   438
        event.button.clicks = (Uint8) SDL_min(clicks, 255);
slouken@1895
   439
        event.button.x = mouse->x;
slouken@1895
   440
        event.button.y = mouse->y;
slouken@1895
   441
        posted = (SDL_PushEvent(&event) > 0);
slouken@1895
   442
    }
slouken@6666
   443
slouken@6666
   444
    /* We do this after dispatching event so button releases can lose focus */
slouken@6666
   445
    if (window && state == SDL_RELEASED) {
slouken@6666
   446
        SDL_UpdateMouseFocus(window, mouse->x, mouse->y, buttonstate);
slouken@6666
   447
    }
slime73@10366
   448
    
slime73@10366
   449
    return posted;
slime73@10366
   450
}
slouken@6666
   451
slime73@10366
   452
int
slime73@10366
   453
SDL_SendMouseButtonClicks(SDL_Window * window, SDL_MouseID mouseID, Uint8 state, Uint8 button, int clicks)
slime73@10366
   454
{
slime73@10366
   455
    clicks = SDL_max(clicks, 0);
slime73@10366
   456
    return SDL_PrivateSendMouseButton(window, mouseID, state, button, clicks);
slime73@10366
   457
}
slime73@10366
   458
slime73@10366
   459
int
slime73@10366
   460
SDL_SendMouseButton(SDL_Window * window, SDL_MouseID mouseID, Uint8 state, Uint8 button)
slime73@10366
   461
{
slime73@10366
   462
    return SDL_PrivateSendMouseButton(window, mouseID, state, button, -1);
slouken@1895
   463
}
slouken@1895
   464
slouken@1895
   465
int
urkle@9257
   466
SDL_SendMouseWheel(SDL_Window * window, SDL_MouseID mouseID, int x, int y, SDL_MouseWheelDirection direction)
slouken@1895
   467
{
slouken@5371
   468
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@1895
   469
    int posted;
slouken@1895
   470
slouken@4484
   471
    if (window) {
slouken@4484
   472
        SDL_SetMouseFocus(window);
slouken@4484
   473
    }
slouken@4484
   474
slouken@4465
   475
    if (!x && !y) {
slouken@1895
   476
        return 0;
slouken@1895
   477
    }
slouken@1895
   478
slouken@1895
   479
    /* Post the event, if desired */
slouken@1895
   480
    posted = 0;
slouken@4429
   481
    if (SDL_GetEventState(SDL_MOUSEWHEEL) == SDL_ENABLE) {
slouken@1895
   482
        SDL_Event event;
slouken@1895
   483
        event.type = SDL_MOUSEWHEEL;
slouken@4465
   484
        event.wheel.windowID = mouse->focus ? mouse->focus->id : 0;
slouken@6950
   485
        event.wheel.which = mouseID;
slouken@2152
   486
        event.wheel.x = x;
slouken@2152
   487
        event.wheel.y = y;
urkle@9257
   488
        event.wheel.direction = (Uint32)direction;
slouken@1895
   489
        posted = (SDL_PushEvent(&event) > 0);
slouken@1895
   490
    }
slouken@1895
   491
    return posted;
slouken@1895
   492
}
slouken@1895
   493
slouken@1895
   494
void
slouken@4465
   495
SDL_MouseQuit(void)
slouken@4465
   496
{
slouken@7493
   497
    SDL_Cursor *cursor, *next;
slouken@7493
   498
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@7493
   499
slouken@9161
   500
    if (mouse->CaptureMouse) {
slouken@9161
   501
        SDL_CaptureMouse(SDL_FALSE);
slouken@9161
   502
    }
slouken@8049
   503
    SDL_SetRelativeMouseMode(SDL_FALSE);
slouken@7493
   504
    SDL_ShowCursor(1);
slouken@7493
   505
slouken@7493
   506
    cursor = mouse->cursors;
slouken@7493
   507
    while (cursor) {
slouken@7493
   508
        next = cursor->next;
slouken@7493
   509
        SDL_FreeCursor(cursor);
slouken@7493
   510
        cursor = next;
slouken@7493
   511
    }
slouken@7493
   512
slouken@7493
   513
    if (mouse->def_cursor && mouse->FreeCursor) {
slouken@7493
   514
        mouse->FreeCursor(mouse->def_cursor);
slouken@7493
   515
    }
slouken@7493
   516
slouken@8066
   517
    if (mouse->clickstate) {
slouken@8066
   518
        SDL_free(mouse->clickstate);
slouken@8066
   519
    }
slouken@8066
   520
slouken@7493
   521
    SDL_zerop(mouse);
slouken@10673
   522
slouken@10673
   523
    SDL_DelHintCallback(SDL_HINT_MOUSE_NORMAL_SPEED_SCALE,
slouken@10673
   524
                        SDL_MouseNormalSpeedScaleChanged, mouse);
slouken@10673
   525
slouken@10673
   526
    SDL_DelHintCallback(SDL_HINT_MOUSE_RELATIVE_SPEED_SCALE,
slouken@10673
   527
                        SDL_MouseRelativeSpeedScaleChanged, mouse);
slouken@4465
   528
}
slouken@4465
   529
slouken@6673
   530
Uint32
slouken@4465
   531
SDL_GetMouseState(int *x, int *y)
slouken@4465
   532
{
slouken@5371
   533
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@4465
   534
slouken@4465
   535
    if (x) {
slouken@4465
   536
        *x = mouse->x;
slouken@4465
   537
    }
slouken@4465
   538
    if (y) {
slouken@4465
   539
        *y = mouse->y;
slouken@4465
   540
    }
slouken@4465
   541
    return mouse->buttonstate;
slouken@4465
   542
}
slouken@4465
   543
slouken@6673
   544
Uint32
slouken@4465
   545
SDL_GetRelativeMouseState(int *x, int *y)
slouken@4465
   546
{
slouken@5371
   547
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@4465
   548
slouken@4465
   549
    if (x) {
slouken@4465
   550
        *x = mouse->xdelta;
slouken@4465
   551
    }
slouken@4465
   552
    if (y) {
slouken@4465
   553
        *y = mouse->ydelta;
slouken@4465
   554
    }
slouken@4465
   555
    mouse->xdelta = 0;
slouken@4465
   556
    mouse->ydelta = 0;
slouken@4465
   557
    return mouse->buttonstate;
slouken@4465
   558
}
slouken@4465
   559
icculus@8945
   560
Uint32
icculus@8952
   561
SDL_GetGlobalMouseState(int *x, int *y)
icculus@8945
   562
{
icculus@8945
   563
    SDL_Mouse *mouse = SDL_GetMouse();
icculus@8945
   564
    int tmpx, tmpy;
icculus@8945
   565
icculus@8945
   566
    /* make sure these are never NULL for the backend implementations... */
icculus@8945
   567
    if (!x) {
icculus@8945
   568
        x = &tmpx;
icculus@8945
   569
    }
icculus@8945
   570
    if (!y) {
icculus@8945
   571
        y = &tmpy;
icculus@8945
   572
    }
icculus@8945
   573
icculus@8945
   574
    *x = *y = 0;
icculus@8945
   575
icculus@8952
   576
    if (!mouse->GetGlobalMouseState) {
icculus@8945
   577
        SDL_assert(0 && "This should really be implemented for every target.");
icculus@8945
   578
        return 0;
icculus@8945
   579
    }
icculus@8945
   580
icculus@8952
   581
    return mouse->GetGlobalMouseState(x, y);
icculus@8945
   582
}
icculus@8945
   583
slouken@4465
   584
void
slouken@3685
   585
SDL_WarpMouseInWindow(SDL_Window * window, int x, int y)
slouken@1895
   586
{
slouken@5371
   587
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@7191
   588
icculus@8953
   589
    if (window == NULL) {
slouken@7191
   590
        window = mouse->focus;
icculus@8944
   591
    }
slouken@7191
   592
icculus@8953
   593
    if (window == NULL) {
slouken@7191
   594
        return;
icculus@8944
   595
    }
slouken@1895
   596
slouken@1895
   597
    if (mouse->WarpMouse) {
slouken@5371
   598
        mouse->WarpMouse(window, x, y);
slouken@1895
   599
    } else {
slouken@6950
   600
        SDL_SendMouseMotion(window, mouse->mouseID, 0, x, y);
slouken@1895
   601
    }
slouken@1895
   602
}
slouken@1895
   603
icculus@9807
   604
int
slouken@8815
   605
SDL_WarpMouseGlobal(int x, int y)
slouken@8815
   606
{
slouken@8815
   607
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@8815
   608
slouken@8815
   609
    if (mouse->WarpMouseGlobal) {
icculus@9807
   610
        return mouse->WarpMouseGlobal(x, y);
slouken@8815
   611
    }
icculus@9807
   612
icculus@9807
   613
    return SDL_Unsupported();
slouken@8815
   614
}
slouken@8815
   615
slouken@8071
   616
static SDL_bool
slouken@8071
   617
ShouldUseRelativeModeWarp(SDL_Mouse *mouse)
slouken@8071
   618
{
slouken@8071
   619
    if (!mouse->SetRelativeMouseMode) {
slouken@8071
   620
        return SDL_TRUE;
slouken@8071
   621
    }
slouken@8071
   622
slouken@10499
   623
    return SDL_GetHintBoolean(SDL_HINT_MOUSE_RELATIVE_MODE_WARP, SDL_FALSE);
slouken@8071
   624
}
slouken@8071
   625
slouken@4465
   626
int
slouken@4465
   627
SDL_SetRelativeMouseMode(SDL_bool enabled)
slouken@4465
   628
{
slouken@5371
   629
    SDL_Mouse *mouse = SDL_GetMouse();
jorgen@7107
   630
    SDL_Window *focusWindow = SDL_GetKeyboardFocus();
slouken@4465
   631
slouken@5406
   632
    if (enabled == mouse->relative_mode) {
slouken@5406
   633
        return 0;
slouken@5406
   634
    }
slouken@5406
   635
jorgen@7107
   636
    if (enabled && focusWindow) {
jorgen@7107
   637
        /* Center it in the focused window to prevent clicks from going through
jorgen@7107
   638
         * to background windows.
jorgen@7107
   639
         */
jorgen@7107
   640
        SDL_SetMouseFocus(focusWindow);
jorgen@7107
   641
        SDL_WarpMouseInWindow(focusWindow, focusWindow->w/2, focusWindow->h/2);
jorgen@7107
   642
    }
jorgen@7107
   643
slouken@8071
   644
    /* Set the relative mode */
slouken@8071
   645
    if (!enabled && mouse->relative_mode_warp) {
slouken@8071
   646
        mouse->relative_mode_warp = SDL_FALSE;
slouken@8071
   647
    } else if (enabled && ShouldUseRelativeModeWarp(mouse)) {
slouken@8071
   648
        mouse->relative_mode_warp = SDL_TRUE;
slouken@8071
   649
    } else if (mouse->SetRelativeMouseMode(enabled) < 0) {
slouken@8269
   650
        if (enabled) {
philipp@8776
   651
            /* Fall back to warp mode if native relative mode failed */
slouken@8269
   652
            mouse->relative_mode_warp = SDL_TRUE;
slouken@8269
   653
        }
slouken@5406
   654
    }
slouken@4465
   655
    mouse->relative_mode = enabled;
slouken@10673
   656
    mouse->scale_accum_x = 0.0f;
slouken@10673
   657
    mouse->scale_accum_y = 0.0f;
slouken@4465
   658
slouken@8071
   659
    if (mouse->focus) {
slouken@8071
   660
        SDL_UpdateWindowGrab(mouse->focus);
slouken@8071
   661
slouken@8071
   662
        /* Put the cursor back to where the application expects it */
slouken@8071
   663
        if (!enabled) {
slouken@8071
   664
            SDL_WarpMouseInWindow(mouse->focus, mouse->x, mouse->y);
slouken@8071
   665
        }
slouken@4465
   666
    }
slouken@4465
   667
slouken@8071
   668
    /* Flush pending mouse motion - ideally we would pump events, but that's not always safe */
slouken@5406
   669
    SDL_FlushEvent(SDL_MOUSEMOTION);
slouken@5406
   670
slouken@4465
   671
    /* Update cursor visibility */
slouken@4465
   672
    SDL_SetCursor(NULL);
slouken@4465
   673
slouken@4465
   674
    return 0;
slouken@4465
   675
}
slouken@4465
   676
slouken@4465
   677
SDL_bool
slouken@4465
   678
SDL_GetRelativeMouseMode()
slouken@4465
   679
{
slouken@5371
   680
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@4465
   681
slouken@4465
   682
    return mouse->relative_mode;
slouken@4465
   683
}
slouken@4465
   684
icculus@8955
   685
int
icculus@8955
   686
SDL_CaptureMouse(SDL_bool enabled)
icculus@8955
   687
{
icculus@8955
   688
    SDL_Mouse *mouse = SDL_GetMouse();
icculus@8955
   689
    SDL_Window *focusWindow;
icculus@8955
   690
    SDL_bool isCaptured;
icculus@8955
   691
icculus@8955
   692
    if (!mouse->CaptureMouse) {
icculus@8955
   693
        return SDL_Unsupported();
icculus@8955
   694
    }
icculus@8955
   695
icculus@8955
   696
    focusWindow = SDL_GetKeyboardFocus();
icculus@8955
   697
icculus@8955
   698
    isCaptured = focusWindow && (focusWindow->flags & SDL_WINDOW_MOUSE_CAPTURE);
icculus@8955
   699
    if (isCaptured == enabled) {
icculus@8955
   700
        return 0;  /* already done! */
icculus@8955
   701
    }
icculus@8955
   702
icculus@8955
   703
    if (enabled) {
icculus@8955
   704
        if (!focusWindow) {
icculus@8955
   705
            return SDL_SetError("No window has focus");
icculus@8955
   706
        } else if (mouse->CaptureMouse(focusWindow) == -1) {
icculus@8955
   707
            return -1;  /* CaptureMouse() should call SetError */
icculus@8955
   708
        }
icculus@8955
   709
        focusWindow->flags |= SDL_WINDOW_MOUSE_CAPTURE;
icculus@8955
   710
    } else {
icculus@8955
   711
        if (mouse->CaptureMouse(NULL) == -1) {
icculus@8955
   712
            return -1;  /* CaptureMouse() should call SetError */
icculus@8955
   713
        }
icculus@8955
   714
        focusWindow->flags &= ~SDL_WINDOW_MOUSE_CAPTURE;
icculus@8955
   715
    }
icculus@8955
   716
icculus@8955
   717
    return 0;
icculus@8955
   718
}
icculus@8955
   719
slouken@1895
   720
SDL_Cursor *
slouken@1895
   721
SDL_CreateCursor(const Uint8 * data, const Uint8 * mask,
slouken@1895
   722
                 int w, int h, int hot_x, int hot_y)
slouken@1895
   723
{
slouken@1895
   724
    SDL_Surface *surface;
slouken@1895
   725
    SDL_Cursor *cursor;
slouken@1895
   726
    int x, y;
slouken@1895
   727
    Uint32 *pixel;
slouken@4465
   728
    Uint8 datab = 0, maskb = 0;
slouken@1895
   729
    const Uint32 black = 0xFF000000;
slouken@1895
   730
    const Uint32 white = 0xFFFFFFFF;
slouken@1895
   731
    const Uint32 transparent = 0x00000000;
slouken@1895
   732
slouken@1895
   733
    /* Make sure the width is a multiple of 8 */
slouken@1895
   734
    w = ((w + 7) & ~7);
slouken@1895
   735
slouken@1895
   736
    /* Create the surface from a bitmap */
slouken@5473
   737
    surface = SDL_CreateRGBSurface(0, w, h, 32,
slouken@5473
   738
                                   0x00FF0000,
slouken@5473
   739
                                   0x0000FF00,
slouken@5473
   740
                                   0x000000FF,
slouken@5473
   741
                                   0xFF000000);
slouken@1895
   742
    if (!surface) {
slouken@1895
   743
        return NULL;
slouken@1895
   744
    }
slouken@1895
   745
    for (y = 0; y < h; ++y) {
slouken@1895
   746
        pixel = (Uint32 *) ((Uint8 *) surface->pixels + y * surface->pitch);
slouken@1895
   747
        for (x = 0; x < w; ++x) {
slouken@1895
   748
            if ((x % 8) == 0) {
slouken@1895
   749
                datab = *data++;
slouken@1895
   750
                maskb = *mask++;
slouken@1895
   751
            }
slouken@1895
   752
            if (maskb & 0x80) {
slouken@1895
   753
                *pixel++ = (datab & 0x80) ? black : white;
slouken@1895
   754
            } else {
slouken@1895
   755
                *pixel++ = (datab & 0x80) ? black : transparent;
slouken@1895
   756
            }
slouken@1895
   757
            datab <<= 1;
slouken@1895
   758
            maskb <<= 1;
slouken@1895
   759
        }
slouken@1895
   760
    }
slouken@1895
   761
slouken@5473
   762
    cursor = SDL_CreateColorCursor(surface, hot_x, hot_y);
slouken@5473
   763
slouken@5473
   764
    SDL_FreeSurface(surface);
slouken@5473
   765
slouken@5473
   766
    return cursor;
slouken@5473
   767
}
slouken@5473
   768
slouken@5473
   769
SDL_Cursor *
slouken@5473
   770
SDL_CreateColorCursor(SDL_Surface *surface, int hot_x, int hot_y)
slouken@5473
   771
{
slouken@5473
   772
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@5473
   773
    SDL_Surface *temp = NULL;
slouken@5473
   774
    SDL_Cursor *cursor;
slouken@5473
   775
slouken@5473
   776
    if (!surface) {
slouken@5473
   777
        SDL_SetError("Passed NULL cursor surface");
slouken@5473
   778
        return NULL;
slouken@5473
   779
    }
slouken@5473
   780
slouken@5473
   781
    if (!mouse->CreateCursor) {
slouken@5473
   782
        SDL_SetError("Cursors are not currently supported");
slouken@5473
   783
        return NULL;
slouken@5473
   784
    }
slouken@5473
   785
slouken@5473
   786
    /* Sanity check the hot spot */
slouken@5473
   787
    if ((hot_x < 0) || (hot_y < 0) ||
slouken@5473
   788
        (hot_x >= surface->w) || (hot_y >= surface->h)) {
slouken@5473
   789
        SDL_SetError("Cursor hot spot doesn't lie within cursor");
slouken@5473
   790
        return NULL;
slouken@5473
   791
    }
slouken@5473
   792
slouken@5473
   793
    if (surface->format->format != SDL_PIXELFORMAT_ARGB8888) {
slouken@5473
   794
        temp = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ARGB8888, 0);
slouken@5473
   795
        if (!temp) {
slouken@5473
   796
            return NULL;
slouken@5473
   797
        }
slouken@5473
   798
        surface = temp;
slouken@5473
   799
    }
slouken@5473
   800
slouken@1895
   801
    cursor = mouse->CreateCursor(surface, hot_x, hot_y);
slouken@1895
   802
    if (cursor) {
slouken@1895
   803
        cursor->next = mouse->cursors;
slouken@1895
   804
        mouse->cursors = cursor;
slouken@1895
   805
    }
slouken@1895
   806
slouken@7720
   807
    SDL_FreeSurface(temp);
slouken@1895
   808
slouken@1895
   809
    return cursor;
slouken@1895
   810
}
slouken@1895
   811
mikesart@6675
   812
SDL_Cursor *
mikesart@6675
   813
SDL_CreateSystemCursor(SDL_SystemCursor id)
mikesart@6675
   814
{
mikesart@6675
   815
    SDL_Mouse *mouse = SDL_GetMouse();
mikesart@6675
   816
    SDL_Cursor *cursor;
mikesart@6675
   817
mikesart@6675
   818
    if (!mouse->CreateSystemCursor) {
mikesart@6675
   819
        SDL_SetError("CreateSystemCursor is not currently supported");
mikesart@6675
   820
        return NULL;
mikesart@6675
   821
    }
mikesart@6675
   822
slouken@7191
   823
    cursor = mouse->CreateSystemCursor(id);
mikesart@6675
   824
    if (cursor) {
mikesart@6675
   825
        cursor->next = mouse->cursors;
mikesart@6675
   826
        mouse->cursors = cursor;
mikesart@6675
   827
    }
mikesart@6675
   828
slouken@7191
   829
    return cursor;
mikesart@6675
   830
}
mikesart@6675
   831
slouken@1895
   832
/* SDL_SetCursor(NULL) can be used to force the cursor redraw,
slouken@1895
   833
   if this is desired for any reason.  This is used when setting
slouken@1895
   834
   the video mode and when the SDL window gains the mouse focus.
slouken@1895
   835
 */
slouken@1895
   836
void
slouken@1895
   837
SDL_SetCursor(SDL_Cursor * cursor)
slouken@1895
   838
{
slouken@5371
   839
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@1895
   840
slouken@1895
   841
    /* Set the new cursor */
slouken@1895
   842
    if (cursor) {
slouken@1895
   843
        /* Make sure the cursor is still valid for this mouse */
slouken@5405
   844
        if (cursor != mouse->def_cursor) {
slouken@5405
   845
            SDL_Cursor *found;
slouken@5405
   846
            for (found = mouse->cursors; found; found = found->next) {
slouken@5405
   847
                if (found == cursor) {
slouken@5405
   848
                    break;
slouken@5405
   849
                }
slouken@1895
   850
            }
slouken@5405
   851
            if (!found) {
slouken@5405
   852
                SDL_SetError("Cursor not associated with the current mouse");
slouken@5405
   853
                return;
slouken@5405
   854
            }
slouken@1895
   855
        }
slouken@1895
   856
        mouse->cur_cursor = cursor;
slouken@1895
   857
    } else {
ghostunderscore@6301
   858
        if (mouse->focus) {
ghostunderscore@6301
   859
            cursor = mouse->cur_cursor;
ghostunderscore@6301
   860
        } else {
ghostunderscore@6301
   861
            cursor = mouse->def_cursor;
ghostunderscore@6301
   862
        }
slouken@1895
   863
    }
slouken@1895
   864
slouken@1895
   865
    if (cursor && mouse->cursor_shown && !mouse->relative_mode) {
slouken@1895
   866
        if (mouse->ShowCursor) {
slouken@1895
   867
            mouse->ShowCursor(cursor);
slouken@1895
   868
        }
slouken@1895
   869
    } else {
slouken@1895
   870
        if (mouse->ShowCursor) {
slouken@1895
   871
            mouse->ShowCursor(NULL);
slouken@1895
   872
        }
slouken@1895
   873
    }
slouken@1895
   874
}
slouken@1895
   875
slouken@1895
   876
SDL_Cursor *
slouken@1895
   877
SDL_GetCursor(void)
slouken@1895
   878
{
slouken@5371
   879
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@1895
   880
slouken@1895
   881
    if (!mouse) {
slouken@1895
   882
        return NULL;
slouken@1895
   883
    }
slouken@1895
   884
    return mouse->cur_cursor;
slouken@1895
   885
}
slouken@1895
   886
jorgen@7104
   887
SDL_Cursor *
jorgen@7104
   888
SDL_GetDefaultCursor(void)
jorgen@7104
   889
{
jorgen@7104
   890
    SDL_Mouse *mouse = SDL_GetMouse();
jorgen@7104
   891
jorgen@7104
   892
    if (!mouse) {
jorgen@7104
   893
        return NULL;
jorgen@7104
   894
    }
jorgen@7104
   895
    return mouse->def_cursor;
jorgen@7104
   896
}
jorgen@7104
   897
slouken@1895
   898
void
slouken@1895
   899
SDL_FreeCursor(SDL_Cursor * cursor)
slouken@1895
   900
{
slouken@5371
   901
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@1895
   902
    SDL_Cursor *curr, *prev;
slouken@1895
   903
slouken@1895
   904
    if (!cursor) {
slouken@1895
   905
        return;
slouken@1895
   906
    }
slouken@1895
   907
slouken@1895
   908
    if (cursor == mouse->def_cursor) {
slouken@1895
   909
        return;
slouken@1895
   910
    }
slouken@1895
   911
    if (cursor == mouse->cur_cursor) {
slouken@1895
   912
        SDL_SetCursor(mouse->def_cursor);
slouken@1895
   913
    }
slouken@1895
   914
slouken@1895
   915
    for (prev = NULL, curr = mouse->cursors; curr;
slouken@1895
   916
         prev = curr, curr = curr->next) {
slouken@1895
   917
        if (curr == cursor) {
slouken@1895
   918
            if (prev) {
slouken@1895
   919
                prev->next = curr->next;
slouken@1895
   920
            } else {
slouken@1895
   921
                mouse->cursors = curr->next;
slouken@1895
   922
            }
slouken@1895
   923
slouken@1895
   924
            if (mouse->FreeCursor) {
slouken@1895
   925
                mouse->FreeCursor(curr);
slouken@1895
   926
            }
slouken@1895
   927
            return;
slouken@1895
   928
        }
slouken@1895
   929
    }
slouken@1895
   930
}
slouken@1895
   931
slouken@1895
   932
int
slouken@1895
   933
SDL_ShowCursor(int toggle)
slouken@1895
   934
{
slouken@5371
   935
    SDL_Mouse *mouse = SDL_GetMouse();
slouken@1895
   936
    SDL_bool shown;
slouken@1895
   937
slouken@1895
   938
    if (!mouse) {
slouken@1895
   939
        return 0;
slouken@1895
   940
    }
slouken@1895
   941
slouken@1895
   942
    shown = mouse->cursor_shown;
slouken@1895
   943
    if (toggle >= 0) {
slouken@1895
   944
        if (toggle) {
slouken@1895
   945
            mouse->cursor_shown = SDL_TRUE;
slouken@1895
   946
        } else {
slouken@1895
   947
            mouse->cursor_shown = SDL_FALSE;
slouken@1895
   948
        }
slouken@1895
   949
        if (mouse->cursor_shown != shown) {
slouken@1895
   950
            SDL_SetCursor(NULL);
slouken@1895
   951
        }
slouken@1895
   952
    }
slouken@1895
   953
    return shown;
slouken@1895
   954
}
slouken@1895
   955
jorgen@7097
   956
/* vi: set ts=4 sw=4 expandtab: */