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SDL_windowevents.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2011 Sam Lantinga
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This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
/* Window event handling code for SDL */
#include "SDL_events.h"
#include "SDL_events_c.h"
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#include "SDL_mouse_c.h"
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#include "../video/SDL_sysvideo.h"
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static int
RemovePendingSizeEvents(void * userdata, SDL_Event *event)
{
SDL_Event *new_event = (SDL_Event *)userdata;
if (event->type == SDL_WINDOWEVENT &&
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(event->window.event == SDL_WINDOWEVENT_RESIZED ||
event->window.event == SDL_WINDOWEVENT_SIZE_CHANGED) &&
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event->window.windowID == new_event->window.windowID) {
/* We're about to post a new size event, drop the old one */
return 0;
}
return 1;
}
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static int
RemovePendingMoveEvents(void * userdata, SDL_Event *event)
{
SDL_Event *new_event = (SDL_Event *)userdata;
if (event->type == SDL_WINDOWEVENT &&
event->window.event == SDL_WINDOWEVENT_MOVED &&
event->window.windowID == new_event->window.windowID) {
/* We're about to post a new move event, drop the old one */
return 0;
}
return 1;
}
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SDL_SendWindowEvent(SDL_Window * window, Uint8 windowevent, int data1,
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int data2)
{
int posted;
if (!window) {
return 0;
}
switch (windowevent) {
case SDL_WINDOWEVENT_SHOWN:
if (window->flags & SDL_WINDOW_SHOWN) {
return 0;
}
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window->flags &= ~SDL_WINDOW_HIDDEN;
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window->flags |= SDL_WINDOW_SHOWN;
SDL_OnWindowShown(window);
break;
case SDL_WINDOWEVENT_HIDDEN:
if (!(window->flags & SDL_WINDOW_SHOWN)) {
return 0;
}
window->flags &= ~SDL_WINDOW_SHOWN;
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window->flags |= SDL_WINDOW_HIDDEN;
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SDL_OnWindowHidden(window);
break;
case SDL_WINDOWEVENT_MOVED:
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if (SDL_WINDOWPOS_ISUNDEFINED(data1) ||
SDL_WINDOWPOS_ISUNDEFINED(data2)) {
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return 0;
}
if (data1 == window->x && data2 == window->y) {
return 0;
}
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window->x = data1;
window->y = data2;
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break;
case SDL_WINDOWEVENT_RESIZED:
if (data1 == window->w && data2 == window->h) {
return 0;
}
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window->w = data1;
window->h = data2;
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SDL_OnWindowResized(window);
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break;
case SDL_WINDOWEVENT_MINIMIZED:
if (window->flags & SDL_WINDOW_MINIMIZED) {
return 0;
}
window->flags |= SDL_WINDOW_MINIMIZED;
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SDL_OnWindowMinimized(window);
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break;
case SDL_WINDOWEVENT_MAXIMIZED:
if (window->flags & SDL_WINDOW_MAXIMIZED) {
return 0;
}
window->flags |= SDL_WINDOW_MAXIMIZED;
break;
case SDL_WINDOWEVENT_RESTORED:
if (!(window->flags & (SDL_WINDOW_MINIMIZED | SDL_WINDOW_MAXIMIZED))) {
return 0;
}
window->flags &= ~(SDL_WINDOW_MINIMIZED | SDL_WINDOW_MAXIMIZED);
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SDL_OnWindowRestored(window);
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break;
case SDL_WINDOWEVENT_ENTER:
if (window->flags & SDL_WINDOW_MOUSE_FOCUS) {
return 0;
}
window->flags |= SDL_WINDOW_MOUSE_FOCUS;
break;
case SDL_WINDOWEVENT_LEAVE:
if (!(window->flags & SDL_WINDOW_MOUSE_FOCUS)) {
return 0;
}
window->flags &= ~SDL_WINDOW_MOUSE_FOCUS;
break;
case SDL_WINDOWEVENT_FOCUS_GAINED:
if (window->flags & SDL_WINDOW_INPUT_FOCUS) {
return 0;
}
window->flags |= SDL_WINDOW_INPUT_FOCUS;
SDL_OnWindowFocusGained(window);
break;
case SDL_WINDOWEVENT_FOCUS_LOST:
if (!(window->flags & SDL_WINDOW_INPUT_FOCUS)) {
return 0;
}
window->flags &= ~SDL_WINDOW_INPUT_FOCUS;
SDL_OnWindowFocusLost(window);
break;
}
/* Post the event, if desired */
posted = 0;
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if (SDL_GetEventState(SDL_WINDOWEVENT) == SDL_ENABLE) {
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SDL_Event event;
event.type = SDL_WINDOWEVENT;
event.window.event = windowevent;
event.window.data1 = data1;
event.window.data2 = data2;
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event.window.windowID = window->id;
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/* Fixes queue overflow with resize events that aren't processed */
if (windowevent == SDL_WINDOWEVENT_RESIZED) {
SDL_FilterEvents(RemovePendingSizeEvents, &event);
}
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if (windowevent == SDL_WINDOWEVENT_MOVED) {
SDL_FilterEvents(RemovePendingMoveEvents, &event);
}
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posted = (SDL_PushEvent(&event) > 0);
}
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if (windowevent == SDL_WINDOWEVENT_CLOSE) {
if ( !window->prev && !window->next ) {
// This is the last window in the list so send the SDL_QUIT event
SDL_SendQuit();
}
}
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return (posted);
}
/* vi: set ts=4 sw=4 expandtab: */