| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "../SDL_internal.h" |
| |
| /* General mouse handling code for SDL */ |
| |
| #include "SDL_assert.h" |
| #include "SDL_hints.h" |
| #include "SDL_timer.h" |
| #include "SDL_events.h" |
| #include "SDL_events_c.h" |
| #include "../video/SDL_sysvideo.h" |
| |
| /* #define DEBUG_MOUSE */ |
| |
| /* The mouse state */ |
| static SDL_Mouse SDL_mouse; |
| |
| static int |
| SDL_PrivateSendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relative, int x, int y); |
| |
| static void SDLCALL |
| SDL_MouseDoubleClickTimeChanged(void *userdata, const char *name, const char *oldValue, const char *hint) |
| { |
| SDL_Mouse *mouse = (SDL_Mouse *)userdata; |
| |
| if (hint && *hint) { |
| mouse->double_click_time = SDL_atoi(hint); |
| } else { |
| #ifdef __WIN32__ |
| mouse->double_click_time = GetDoubleClickTime(); |
| #else |
| mouse->double_click_time = 500; |
| #endif |
| } |
| } |
| |
| static void SDLCALL |
| SDL_MouseDoubleClickRadiusChanged(void *userdata, const char *name, const char *oldValue, const char *hint) |
| { |
| SDL_Mouse *mouse = (SDL_Mouse *)userdata; |
| |
| if (hint && *hint) { |
| mouse->double_click_radius = SDL_atoi(hint); |
| } else { |
| mouse->double_click_radius = 32; /* 32 pixels seems about right for touch interfaces */ |
| } |
| } |
| |
| static void SDLCALL |
| SDL_MouseNormalSpeedScaleChanged(void *userdata, const char *name, const char *oldValue, const char *hint) |
| { |
| SDL_Mouse *mouse = (SDL_Mouse *)userdata; |
| |
| if (hint && *hint) { |
| mouse->normal_speed_scale = (float)SDL_atof(hint); |
| } else { |
| mouse->normal_speed_scale = 1.0f; |
| } |
| } |
| |
| static void SDLCALL |
| SDL_MouseRelativeSpeedScaleChanged(void *userdata, const char *name, const char *oldValue, const char *hint) |
| { |
| SDL_Mouse *mouse = (SDL_Mouse *)userdata; |
| |
| if (hint && *hint) { |
| mouse->relative_speed_scale = (float)SDL_atof(hint); |
| } else { |
| mouse->relative_speed_scale = 1.0f; |
| } |
| } |
| |
| static void SDLCALL |
| SDL_TouchMouseEventsChanged(void *userdata, const char *name, const char *oldValue, const char *hint) |
| { |
| SDL_Mouse *mouse = (SDL_Mouse *)userdata; |
| |
| if (hint && (*hint == '0' || SDL_strcasecmp(hint, "false") == 0)) { |
| mouse->touch_mouse_events = SDL_FALSE; |
| } else { |
| mouse->touch_mouse_events = SDL_TRUE; |
| } |
| } |
| |
| /* Public functions */ |
| int |
| SDL_MouseInit(void) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| SDL_zerop(mouse); |
| |
| SDL_AddHintCallback(SDL_HINT_MOUSE_DOUBLE_CLICK_TIME, |
| SDL_MouseDoubleClickTimeChanged, mouse); |
| |
| SDL_AddHintCallback(SDL_HINT_MOUSE_DOUBLE_CLICK_RADIUS, |
| SDL_MouseDoubleClickRadiusChanged, mouse); |
| |
| SDL_AddHintCallback(SDL_HINT_MOUSE_NORMAL_SPEED_SCALE, |
| SDL_MouseNormalSpeedScaleChanged, mouse); |
| |
| SDL_AddHintCallback(SDL_HINT_MOUSE_RELATIVE_SPEED_SCALE, |
| SDL_MouseRelativeSpeedScaleChanged, mouse); |
| |
| SDL_AddHintCallback(SDL_HINT_TOUCH_MOUSE_EVENTS, |
| SDL_TouchMouseEventsChanged, mouse); |
| |
| mouse->cursor_shown = SDL_TRUE; |
| |
| return (0); |
| } |
| |
| void |
| SDL_SetDefaultCursor(SDL_Cursor * cursor) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| mouse->def_cursor = cursor; |
| if (!mouse->cur_cursor) { |
| SDL_SetCursor(cursor); |
| } |
| } |
| |
| SDL_Mouse * |
| SDL_GetMouse(void) |
| { |
| return &SDL_mouse; |
| } |
| |
| SDL_Window * |
| SDL_GetMouseFocus(void) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| return mouse->focus; |
| } |
| |
| #if 0 |
| void |
| SDL_ResetMouse(void) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| Uint8 i; |
| |
| #ifdef DEBUG_MOUSE |
| printf("Resetting mouse\n"); |
| #endif |
| for (i = 1; i <= sizeof(mouse->buttonstate)*8; ++i) { |
| if (mouse->buttonstate & SDL_BUTTON(i)) { |
| SDL_SendMouseButton(mouse->focus, mouse->mouseID, SDL_RELEASED, i); |
| } |
| } |
| SDL_assert(mouse->buttonstate == 0); |
| } |
| #endif |
| |
| void |
| SDL_SetMouseFocus(SDL_Window * window) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| if (mouse->focus == window) { |
| return; |
| } |
| |
| /* Actually, this ends up being a bad idea, because most operating |
| systems have an implicit grab when you press the mouse button down |
| so you can drag things out of the window and then get the mouse up |
| when it happens. So, #if 0... |
| */ |
| #if 0 |
| if (mouse->focus && !window) { |
| /* We won't get anymore mouse messages, so reset mouse state */ |
| SDL_ResetMouse(); |
| } |
| #endif |
| |
| /* See if the current window has lost focus */ |
| if (mouse->focus) { |
| SDL_SendWindowEvent(mouse->focus, SDL_WINDOWEVENT_LEAVE, 0, 0); |
| } |
| |
| mouse->focus = window; |
| mouse->has_position = SDL_FALSE; |
| |
| if (mouse->focus) { |
| SDL_SendWindowEvent(mouse->focus, SDL_WINDOWEVENT_ENTER, 0, 0); |
| } |
| |
| /* Update cursor visibility */ |
| SDL_SetCursor(NULL); |
| } |
| |
| /* Check to see if we need to synthesize focus events */ |
| static SDL_bool |
| SDL_UpdateMouseFocus(SDL_Window * window, int x, int y, Uint32 buttonstate) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| SDL_bool inWindow = SDL_TRUE; |
| |
| if (window && ((window->flags & SDL_WINDOW_MOUSE_CAPTURE) == 0)) { |
| int w, h; |
| SDL_GetWindowSize(window, &w, &h); |
| if (x < 0 || y < 0 || x >= w || y >= h) { |
| inWindow = SDL_FALSE; |
| } |
| } |
| |
| /* Linux doesn't give you mouse events outside your window unless you grab |
| the pointer. |
| |
| Windows doesn't give you mouse events outside your window unless you call |
| SetCapture(). |
| |
| Both of these are slightly scary changes, so for now we'll punt and if the |
| mouse leaves the window you'll lose mouse focus and reset button state. |
| */ |
| #ifdef SUPPORT_DRAG_OUTSIDE_WINDOW |
| if (!inWindow && !buttonstate) { |
| #else |
| if (!inWindow) { |
| #endif |
| if (window == mouse->focus) { |
| #ifdef DEBUG_MOUSE |
| printf("Mouse left window, synthesizing move & focus lost event\n"); |
| #endif |
| SDL_PrivateSendMouseMotion(window, mouse->mouseID, 0, x, y); |
| SDL_SetMouseFocus(NULL); |
| } |
| return SDL_FALSE; |
| } |
| |
| if (window != mouse->focus) { |
| #ifdef DEBUG_MOUSE |
| printf("Mouse entered window, synthesizing focus gain & move event\n"); |
| #endif |
| SDL_SetMouseFocus(window); |
| SDL_PrivateSendMouseMotion(window, mouse->mouseID, 0, x, y); |
| } |
| return SDL_TRUE; |
| } |
| |
| int |
| SDL_SendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relative, int x, int y) |
| { |
| if (window && !relative) { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| if (!SDL_UpdateMouseFocus(window, x, y, mouse->buttonstate)) { |
| return 0; |
| } |
| } |
| |
| return SDL_PrivateSendMouseMotion(window, mouseID, relative, x, y); |
| } |
| |
| static int |
| GetScaledMouseDelta(float scale, int value, float *accum) |
| { |
| if (scale != 1.0f) { |
| *accum += scale * value; |
| if (*accum >= 0.0f) { |
| value = (int)SDL_floor(*accum); |
| } else { |
| value = (int)SDL_ceil(*accum); |
| } |
| *accum -= value; |
| } |
| return value; |
| } |
| |
| static int |
| SDL_PrivateSendMouseMotion(SDL_Window * window, SDL_MouseID mouseID, int relative, int x, int y) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| int posted; |
| int xrel; |
| int yrel; |
| |
| if (mouseID == SDL_TOUCH_MOUSEID && !mouse->touch_mouse_events) { |
| return 0; |
| } |
| |
| if (mouseID != SDL_TOUCH_MOUSEID && mouse->relative_mode_warp) { |
| int center_x = 0, center_y = 0; |
| SDL_GetWindowSize(window, ¢er_x, ¢er_y); |
| center_x /= 2; |
| center_y /= 2; |
| if (x == center_x && y == center_y) { |
| mouse->last_x = center_x; |
| mouse->last_y = center_y; |
| return 0; |
| } |
| SDL_WarpMouseInWindow(window, center_x, center_y); |
| } |
| |
| if (relative) { |
| if (mouse->relative_mode) { |
| x = GetScaledMouseDelta(mouse->relative_speed_scale, x, &mouse->scale_accum_x); |
| y = GetScaledMouseDelta(mouse->relative_speed_scale, y, &mouse->scale_accum_y); |
| } else { |
| x = GetScaledMouseDelta(mouse->normal_speed_scale, x, &mouse->scale_accum_x); |
| y = GetScaledMouseDelta(mouse->normal_speed_scale, y, &mouse->scale_accum_y); |
| } |
| xrel = x; |
| yrel = y; |
| x = (mouse->last_x + xrel); |
| y = (mouse->last_y + yrel); |
| } else { |
| xrel = x - mouse->last_x; |
| yrel = y - mouse->last_y; |
| } |
| |
| /* Drop events that don't change state */ |
| if (!xrel && !yrel) { |
| #ifdef DEBUG_MOUSE |
| printf("Mouse event didn't change state - dropped!\n"); |
| #endif |
| return 0; |
| } |
| |
| /* Ignore relative motion when first positioning the mouse */ |
| if (!mouse->has_position) { |
| xrel = 0; |
| yrel = 0; |
| mouse->has_position = SDL_TRUE; |
| } |
| |
| /* Ignore relative motion positioning the first touch */ |
| if (mouseID == SDL_TOUCH_MOUSEID && !mouse->buttonstate) { |
| xrel = 0; |
| yrel = 0; |
| } |
| |
| /* Update internal mouse coordinates */ |
| if (!mouse->relative_mode) { |
| mouse->x = x; |
| mouse->y = y; |
| } else { |
| mouse->x += xrel; |
| mouse->y += yrel; |
| } |
| |
| /* make sure that the pointers find themselves inside the windows, |
| unless we have the mouse captured. */ |
| if (window && ((window->flags & SDL_WINDOW_MOUSE_CAPTURE) == 0)) { |
| int x_max = 0, y_max = 0; |
| |
| /* !!! FIXME: shouldn't this be (window) instead of (mouse->focus)? */ |
| SDL_GetWindowSize(mouse->focus, &x_max, &y_max); |
| --x_max; |
| --y_max; |
| |
| if (mouse->x > x_max) { |
| mouse->x = x_max; |
| } |
| if (mouse->x < 0) { |
| mouse->x = 0; |
| } |
| |
| if (mouse->y > y_max) { |
| mouse->y = y_max; |
| } |
| if (mouse->y < 0) { |
| mouse->y = 0; |
| } |
| } |
| |
| mouse->xdelta += xrel; |
| mouse->ydelta += yrel; |
| |
| /* Move the mouse cursor, if needed */ |
| if (mouse->cursor_shown && !mouse->relative_mode && |
| mouse->MoveCursor && mouse->cur_cursor) { |
| mouse->MoveCursor(mouse->cur_cursor); |
| } |
| |
| /* Post the event, if desired */ |
| posted = 0; |
| if (SDL_GetEventState(SDL_MOUSEMOTION) == SDL_ENABLE) { |
| SDL_Event event; |
| event.motion.type = SDL_MOUSEMOTION; |
| event.motion.windowID = mouse->focus ? mouse->focus->id : 0; |
| event.motion.which = mouseID; |
| event.motion.state = mouse->buttonstate; |
| event.motion.x = mouse->x; |
| event.motion.y = mouse->y; |
| event.motion.xrel = xrel; |
| event.motion.yrel = yrel; |
| posted = (SDL_PushEvent(&event) > 0); |
| } |
| if (relative) { |
| mouse->last_x = mouse->x; |
| mouse->last_y = mouse->y; |
| } else { |
| /* Use unclamped values if we're getting events outside the window */ |
| mouse->last_x = x; |
| mouse->last_y = y; |
| } |
| return posted; |
| } |
| |
| static SDL_MouseClickState *GetMouseClickState(SDL_Mouse *mouse, Uint8 button) |
| { |
| if (button >= mouse->num_clickstates) { |
| int i, count = button + 1; |
| SDL_MouseClickState *clickstate = (SDL_MouseClickState *)SDL_realloc(mouse->clickstate, count * sizeof(*mouse->clickstate)); |
| if (!clickstate) { |
| return NULL; |
| } |
| mouse->clickstate = clickstate; |
| |
| for (i = mouse->num_clickstates; i < count; ++i) { |
| SDL_zero(mouse->clickstate[i]); |
| } |
| mouse->num_clickstates = count; |
| } |
| return &mouse->clickstate[button]; |
| } |
| |
| static int |
| SDL_PrivateSendMouseButton(SDL_Window * window, SDL_MouseID mouseID, Uint8 state, Uint8 button, int clicks) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| int posted; |
| Uint32 type; |
| Uint32 buttonstate = mouse->buttonstate; |
| |
| if (mouseID == SDL_TOUCH_MOUSEID && !mouse->touch_mouse_events) { |
| return 0; |
| } |
| |
| /* Figure out which event to perform */ |
| switch (state) { |
| case SDL_PRESSED: |
| type = SDL_MOUSEBUTTONDOWN; |
| buttonstate |= SDL_BUTTON(button); |
| break; |
| case SDL_RELEASED: |
| type = SDL_MOUSEBUTTONUP; |
| buttonstate &= ~SDL_BUTTON(button); |
| break; |
| default: |
| /* Invalid state -- bail */ |
| return 0; |
| } |
| |
| /* We do this after calculating buttonstate so button presses gain focus */ |
| if (window && state == SDL_PRESSED) { |
| SDL_UpdateMouseFocus(window, mouse->x, mouse->y, buttonstate); |
| } |
| |
| if (buttonstate == mouse->buttonstate) { |
| /* Ignore this event, no state change */ |
| return 0; |
| } |
| mouse->buttonstate = buttonstate; |
| |
| if (clicks < 0) { |
| SDL_MouseClickState *clickstate = GetMouseClickState(mouse, button); |
| if (clickstate) { |
| if (state == SDL_PRESSED) { |
| Uint32 now = SDL_GetTicks(); |
| |
| if (SDL_TICKS_PASSED(now, clickstate->last_timestamp + mouse->double_click_time) || |
| SDL_abs(mouse->x - clickstate->last_x) > mouse->double_click_radius || |
| SDL_abs(mouse->y - clickstate->last_y) > mouse->double_click_radius) { |
| clickstate->click_count = 0; |
| } |
| clickstate->last_timestamp = now; |
| clickstate->last_x = mouse->x; |
| clickstate->last_y = mouse->y; |
| if (clickstate->click_count < 255) { |
| ++clickstate->click_count; |
| } |
| } |
| clicks = clickstate->click_count; |
| } else { |
| clicks = 1; |
| } |
| } |
| |
| /* Post the event, if desired */ |
| posted = 0; |
| if (SDL_GetEventState(type) == SDL_ENABLE) { |
| SDL_Event event; |
| event.type = type; |
| event.button.windowID = mouse->focus ? mouse->focus->id : 0; |
| event.button.which = mouseID; |
| event.button.state = state; |
| event.button.button = button; |
| event.button.clicks = (Uint8) SDL_min(clicks, 255); |
| event.button.x = mouse->x; |
| event.button.y = mouse->y; |
| posted = (SDL_PushEvent(&event) > 0); |
| } |
| |
| /* We do this after dispatching event so button releases can lose focus */ |
| if (window && state == SDL_RELEASED) { |
| SDL_UpdateMouseFocus(window, mouse->x, mouse->y, buttonstate); |
| } |
| |
| return posted; |
| } |
| |
| int |
| SDL_SendMouseButtonClicks(SDL_Window * window, SDL_MouseID mouseID, Uint8 state, Uint8 button, int clicks) |
| { |
| clicks = SDL_max(clicks, 0); |
| return SDL_PrivateSendMouseButton(window, mouseID, state, button, clicks); |
| } |
| |
| int |
| SDL_SendMouseButton(SDL_Window * window, SDL_MouseID mouseID, Uint8 state, Uint8 button) |
| { |
| return SDL_PrivateSendMouseButton(window, mouseID, state, button, -1); |
| } |
| |
| int |
| SDL_SendMouseWheel(SDL_Window * window, SDL_MouseID mouseID, float x, float y, SDL_MouseWheelDirection direction) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| int posted; |
| int integral_x, integral_y; |
| |
| if (window) { |
| SDL_SetMouseFocus(window); |
| } |
| |
| if (x == 0.0f && y == 0.0f) { |
| return 0; |
| } |
| |
| mouse->accumulated_wheel_x += x; |
| if (mouse->accumulated_wheel_x > 0) { |
| integral_x = (int)SDL_floor(mouse->accumulated_wheel_x); |
| } else if (mouse->accumulated_wheel_x < 0) { |
| integral_x = (int)SDL_ceil(mouse->accumulated_wheel_x); |
| } else { |
| integral_x = 0; |
| } |
| mouse->accumulated_wheel_x -= integral_x; |
| |
| mouse->accumulated_wheel_y += y; |
| if (mouse->accumulated_wheel_y > 0) { |
| integral_y = (int)SDL_floor(mouse->accumulated_wheel_y); |
| } else if (mouse->accumulated_wheel_y < 0) { |
| integral_y = (int)SDL_ceil(mouse->accumulated_wheel_y); |
| } else { |
| integral_y = 0; |
| } |
| mouse->accumulated_wheel_y -= integral_y; |
| |
| /* Post the event, if desired */ |
| posted = 0; |
| if (SDL_GetEventState(SDL_MOUSEWHEEL) == SDL_ENABLE) { |
| SDL_Event event; |
| event.type = SDL_MOUSEWHEEL; |
| event.wheel.windowID = mouse->focus ? mouse->focus->id : 0; |
| event.wheel.which = mouseID; |
| #if 0 /* Uncomment this when it goes in for SDL 2.1 */ |
| event.wheel.preciseX = x; |
| event.wheel.preciseY = y; |
| #endif |
| event.wheel.x = integral_x; |
| event.wheel.y = integral_y; |
| event.wheel.direction = (Uint32)direction; |
| posted = (SDL_PushEvent(&event) > 0); |
| } |
| return posted; |
| } |
| |
| void |
| SDL_MouseQuit(void) |
| { |
| SDL_Cursor *cursor, *next; |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| if (mouse->CaptureMouse) { |
| SDL_CaptureMouse(SDL_FALSE); |
| } |
| SDL_SetRelativeMouseMode(SDL_FALSE); |
| SDL_ShowCursor(1); |
| |
| cursor = mouse->cursors; |
| while (cursor) { |
| next = cursor->next; |
| SDL_FreeCursor(cursor); |
| cursor = next; |
| } |
| mouse->cursors = NULL; |
| |
| if (mouse->def_cursor && mouse->FreeCursor) { |
| mouse->FreeCursor(mouse->def_cursor); |
| mouse->def_cursor = NULL; |
| } |
| |
| if (mouse->clickstate) { |
| SDL_free(mouse->clickstate); |
| mouse->clickstate = NULL; |
| } |
| |
| SDL_DelHintCallback(SDL_HINT_MOUSE_NORMAL_SPEED_SCALE, |
| SDL_MouseNormalSpeedScaleChanged, mouse); |
| |
| SDL_DelHintCallback(SDL_HINT_MOUSE_RELATIVE_SPEED_SCALE, |
| SDL_MouseRelativeSpeedScaleChanged, mouse); |
| } |
| |
| Uint32 |
| SDL_GetMouseState(int *x, int *y) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| if (x) { |
| *x = mouse->x; |
| } |
| if (y) { |
| *y = mouse->y; |
| } |
| return mouse->buttonstate; |
| } |
| |
| Uint32 |
| SDL_GetRelativeMouseState(int *x, int *y) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| if (x) { |
| *x = mouse->xdelta; |
| } |
| if (y) { |
| *y = mouse->ydelta; |
| } |
| mouse->xdelta = 0; |
| mouse->ydelta = 0; |
| return mouse->buttonstate; |
| } |
| |
| Uint32 |
| SDL_GetGlobalMouseState(int *x, int *y) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| int tmpx, tmpy; |
| |
| /* make sure these are never NULL for the backend implementations... */ |
| if (!x) { |
| x = &tmpx; |
| } |
| if (!y) { |
| y = &tmpy; |
| } |
| |
| *x = *y = 0; |
| |
| if (!mouse->GetGlobalMouseState) { |
| return 0; |
| } |
| |
| return mouse->GetGlobalMouseState(x, y); |
| } |
| |
| void |
| SDL_WarpMouseInWindow(SDL_Window * window, int x, int y) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| if (window == NULL) { |
| window = mouse->focus; |
| } |
| |
| if (window == NULL) { |
| return; |
| } |
| |
| if (mouse->WarpMouse) { |
| mouse->WarpMouse(window, x, y); |
| } else { |
| SDL_SendMouseMotion(window, mouse->mouseID, 0, x, y); |
| } |
| } |
| |
| int |
| SDL_WarpMouseGlobal(int x, int y) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| if (mouse->WarpMouseGlobal) { |
| return mouse->WarpMouseGlobal(x, y); |
| } |
| |
| return SDL_Unsupported(); |
| } |
| |
| static SDL_bool |
| ShouldUseRelativeModeWarp(SDL_Mouse *mouse) |
| { |
| if (!mouse->SetRelativeMouseMode) { |
| SDL_assert(mouse->WarpMouse); /* Need this functionality for relative mode warp implementation */ |
| return SDL_TRUE; |
| } |
| |
| return SDL_GetHintBoolean(SDL_HINT_MOUSE_RELATIVE_MODE_WARP, SDL_FALSE); |
| } |
| |
| int |
| SDL_SetRelativeMouseMode(SDL_bool enabled) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| SDL_Window *focusWindow = SDL_GetKeyboardFocus(); |
| |
| if (enabled == mouse->relative_mode) { |
| return 0; |
| } |
| |
| if (enabled && focusWindow) { |
| /* Center it in the focused window to prevent clicks from going through |
| * to background windows. |
| */ |
| SDL_SetMouseFocus(focusWindow); |
| SDL_WarpMouseInWindow(focusWindow, focusWindow->w/2, focusWindow->h/2); |
| } |
| |
| /* Set the relative mode */ |
| if (!enabled && mouse->relative_mode_warp) { |
| mouse->relative_mode_warp = SDL_FALSE; |
| } else if (enabled && ShouldUseRelativeModeWarp(mouse)) { |
| mouse->relative_mode_warp = SDL_TRUE; |
| } else if (mouse->SetRelativeMouseMode(enabled) < 0) { |
| if (enabled) { |
| /* Fall back to warp mode if native relative mode failed */ |
| if (!mouse->WarpMouse) { |
| return SDL_SetError("No relative mode implementation available"); |
| } |
| mouse->relative_mode_warp = SDL_TRUE; |
| } |
| } |
| mouse->relative_mode = enabled; |
| mouse->scale_accum_x = 0.0f; |
| mouse->scale_accum_y = 0.0f; |
| |
| if (mouse->focus) { |
| SDL_UpdateWindowGrab(mouse->focus); |
| |
| /* Put the cursor back to where the application expects it */ |
| if (!enabled) { |
| SDL_WarpMouseInWindow(mouse->focus, mouse->x, mouse->y); |
| } |
| } |
| |
| /* Flush pending mouse motion - ideally we would pump events, but that's not always safe */ |
| SDL_FlushEvent(SDL_MOUSEMOTION); |
| |
| /* Update cursor visibility */ |
| SDL_SetCursor(NULL); |
| |
| return 0; |
| } |
| |
| SDL_bool |
| SDL_GetRelativeMouseMode() |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| return mouse->relative_mode; |
| } |
| |
| int |
| SDL_CaptureMouse(SDL_bool enabled) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| SDL_Window *focusWindow; |
| SDL_bool isCaptured; |
| |
| if (!mouse->CaptureMouse) { |
| return SDL_Unsupported(); |
| } |
| |
| focusWindow = SDL_GetKeyboardFocus(); |
| |
| isCaptured = focusWindow && (focusWindow->flags & SDL_WINDOW_MOUSE_CAPTURE); |
| if (isCaptured == enabled) { |
| return 0; /* already done! */ |
| } |
| |
| if (enabled) { |
| if (!focusWindow) { |
| return SDL_SetError("No window has focus"); |
| } else if (mouse->CaptureMouse(focusWindow) == -1) { |
| return -1; /* CaptureMouse() should call SetError */ |
| } |
| focusWindow->flags |= SDL_WINDOW_MOUSE_CAPTURE; |
| } else { |
| if (mouse->CaptureMouse(NULL) == -1) { |
| return -1; /* CaptureMouse() should call SetError */ |
| } |
| focusWindow->flags &= ~SDL_WINDOW_MOUSE_CAPTURE; |
| } |
| |
| return 0; |
| } |
| |
| SDL_Cursor * |
| SDL_CreateCursor(const Uint8 * data, const Uint8 * mask, |
| int w, int h, int hot_x, int hot_y) |
| { |
| SDL_Surface *surface; |
| SDL_Cursor *cursor; |
| int x, y; |
| Uint32 *pixel; |
| Uint8 datab = 0, maskb = 0; |
| const Uint32 black = 0xFF000000; |
| const Uint32 white = 0xFFFFFFFF; |
| const Uint32 transparent = 0x00000000; |
| |
| /* Make sure the width is a multiple of 8 */ |
| w = ((w + 7) & ~7); |
| |
| /* Create the surface from a bitmap */ |
| surface = SDL_CreateRGBSurface(0, w, h, 32, |
| 0x00FF0000, |
| 0x0000FF00, |
| 0x000000FF, |
| 0xFF000000); |
| if (!surface) { |
| return NULL; |
| } |
| for (y = 0; y < h; ++y) { |
| pixel = (Uint32 *) ((Uint8 *) surface->pixels + y * surface->pitch); |
| for (x = 0; x < w; ++x) { |
| if ((x % 8) == 0) { |
| datab = *data++; |
| maskb = *mask++; |
| } |
| if (maskb & 0x80) { |
| *pixel++ = (datab & 0x80) ? black : white; |
| } else { |
| *pixel++ = (datab & 0x80) ? black : transparent; |
| } |
| datab <<= 1; |
| maskb <<= 1; |
| } |
| } |
| |
| cursor = SDL_CreateColorCursor(surface, hot_x, hot_y); |
| |
| SDL_FreeSurface(surface); |
| |
| return cursor; |
| } |
| |
| SDL_Cursor * |
| SDL_CreateColorCursor(SDL_Surface *surface, int hot_x, int hot_y) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| SDL_Surface *temp = NULL; |
| SDL_Cursor *cursor; |
| |
| if (!surface) { |
| SDL_SetError("Passed NULL cursor surface"); |
| return NULL; |
| } |
| |
| if (!mouse->CreateCursor) { |
| SDL_SetError("Cursors are not currently supported"); |
| return NULL; |
| } |
| |
| /* Sanity check the hot spot */ |
| if ((hot_x < 0) || (hot_y < 0) || |
| (hot_x >= surface->w) || (hot_y >= surface->h)) { |
| SDL_SetError("Cursor hot spot doesn't lie within cursor"); |
| return NULL; |
| } |
| |
| if (surface->format->format != SDL_PIXELFORMAT_ARGB8888) { |
| temp = SDL_ConvertSurfaceFormat(surface, SDL_PIXELFORMAT_ARGB8888, 0); |
| if (!temp) { |
| return NULL; |
| } |
| surface = temp; |
| } |
| |
| cursor = mouse->CreateCursor(surface, hot_x, hot_y); |
| if (cursor) { |
| cursor->next = mouse->cursors; |
| mouse->cursors = cursor; |
| } |
| |
| SDL_FreeSurface(temp); |
| |
| return cursor; |
| } |
| |
| SDL_Cursor * |
| SDL_CreateSystemCursor(SDL_SystemCursor id) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| SDL_Cursor *cursor; |
| |
| if (!mouse->CreateSystemCursor) { |
| SDL_SetError("CreateSystemCursor is not currently supported"); |
| return NULL; |
| } |
| |
| cursor = mouse->CreateSystemCursor(id); |
| if (cursor) { |
| cursor->next = mouse->cursors; |
| mouse->cursors = cursor; |
| } |
| |
| return cursor; |
| } |
| |
| /* SDL_SetCursor(NULL) can be used to force the cursor redraw, |
| if this is desired for any reason. This is used when setting |
| the video mode and when the SDL window gains the mouse focus. |
| */ |
| void |
| SDL_SetCursor(SDL_Cursor * cursor) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| /* Set the new cursor */ |
| if (cursor) { |
| /* Make sure the cursor is still valid for this mouse */ |
| if (cursor != mouse->def_cursor) { |
| SDL_Cursor *found; |
| for (found = mouse->cursors; found; found = found->next) { |
| if (found == cursor) { |
| break; |
| } |
| } |
| if (!found) { |
| SDL_SetError("Cursor not associated with the current mouse"); |
| return; |
| } |
| } |
| mouse->cur_cursor = cursor; |
| } else { |
| if (mouse->focus) { |
| cursor = mouse->cur_cursor; |
| } else { |
| cursor = mouse->def_cursor; |
| } |
| } |
| |
| if (cursor && mouse->cursor_shown && !mouse->relative_mode) { |
| if (mouse->ShowCursor) { |
| mouse->ShowCursor(cursor); |
| } |
| } else { |
| if (mouse->ShowCursor) { |
| mouse->ShowCursor(NULL); |
| } |
| } |
| } |
| |
| SDL_Cursor * |
| SDL_GetCursor(void) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| if (!mouse) { |
| return NULL; |
| } |
| return mouse->cur_cursor; |
| } |
| |
| SDL_Cursor * |
| SDL_GetDefaultCursor(void) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| |
| if (!mouse) { |
| return NULL; |
| } |
| return mouse->def_cursor; |
| } |
| |
| void |
| SDL_FreeCursor(SDL_Cursor * cursor) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| SDL_Cursor *curr, *prev; |
| |
| if (!cursor) { |
| return; |
| } |
| |
| if (cursor == mouse->def_cursor) { |
| return; |
| } |
| if (cursor == mouse->cur_cursor) { |
| SDL_SetCursor(mouse->def_cursor); |
| } |
| |
| for (prev = NULL, curr = mouse->cursors; curr; |
| prev = curr, curr = curr->next) { |
| if (curr == cursor) { |
| if (prev) { |
| prev->next = curr->next; |
| } else { |
| mouse->cursors = curr->next; |
| } |
| |
| if (mouse->FreeCursor) { |
| mouse->FreeCursor(curr); |
| } |
| return; |
| } |
| } |
| } |
| |
| int |
| SDL_ShowCursor(int toggle) |
| { |
| SDL_Mouse *mouse = SDL_GetMouse(); |
| SDL_bool shown; |
| |
| if (!mouse) { |
| return 0; |
| } |
| |
| shown = mouse->cursor_shown; |
| if (toggle >= 0) { |
| if (toggle) { |
| mouse->cursor_shown = SDL_TRUE; |
| } else { |
| mouse->cursor_shown = SDL_FALSE; |
| } |
| if (mouse->cursor_shown != shown) { |
| SDL_SetCursor(NULL); |
| } |
| } |
| return shown; |
| } |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |