SDL/test/testwm2.c
Ryan C. Gordon e061a92dc9 Some drag'and'drop improvements.
First: disable d'n'd events by default; most apps don't need these at all, and
if an app doesn't explicitly handle these, each drop on the window will cause
a memory leak if the events are enabled. This follows the guidelines we have
for SDL_TEXTINPUT events already.

Second: when events are enabled or disabled, signal the video layer, as it
might be able to inform the OS, causing UI changes or optimizations (for
example, dropping a file icon on a Cocoa app that isn't accepting drops will
cause macOS to show a rejection animation instead of the drop operation just
vanishing into the ether, X11 might show a different cursor when dragging
onto an accepting window, etc).

Third: fill in the drop event details in the test library and enable the
events in testwm.c for making sure this all works as expected.
2018-08-02 16:03:47 -04:00

175 lines
4.8 KiB
C

/*
Copyright (C) 1997-2018 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.
*/
#include <stdlib.h>
#include <stdio.h>
#ifdef __EMSCRIPTEN__
#include <emscripten/emscripten.h>
#endif
#include "SDL_test_common.h"
static SDLTest_CommonState *state;
int done;
static const char *cursorNames[] = {
"arrow",
"ibeam",
"wait",
"crosshair",
"waitarrow",
"sizeNWSE",
"sizeNESW",
"sizeWE",
"sizeNS",
"sizeALL",
"NO",
"hand",
};
int system_cursor = -1;
SDL_Cursor *cursor = NULL;
/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void
quit(int rc)
{
SDLTest_CommonQuit(state);
exit(rc);
}
void
loop()
{
int i;
SDL_Event event;
/* Check for events */
while (SDL_PollEvent(&event)) {
SDLTest_CommonEvent(state, &event, &done);
if (event.type == SDL_WINDOWEVENT) {
if (event.window.event == SDL_WINDOWEVENT_RESIZED) {
SDL_Window *window = SDL_GetWindowFromID(event.window.windowID);
if (window) {
SDL_Log("Window %d resized to %dx%d\n",
event.window.windowID,
event.window.data1,
event.window.data2);
}
}
if (event.window.event == SDL_WINDOWEVENT_MOVED) {
SDL_Window *window = SDL_GetWindowFromID(event.window.windowID);
if (window) {
SDL_Log("Window %d moved to %d,%d (display %s)\n",
event.window.windowID,
event.window.data1,
event.window.data2,
SDL_GetDisplayName(SDL_GetWindowDisplayIndex(window)));
}
}
}
if (event.type == SDL_KEYUP) {
SDL_bool updateCursor = SDL_FALSE;
if (event.key.keysym.sym == SDLK_LEFT) {
--system_cursor;
if (system_cursor < 0) {
system_cursor = SDL_NUM_SYSTEM_CURSORS - 1;
}
updateCursor = SDL_TRUE;
} else if (event.key.keysym.sym == SDLK_RIGHT) {
++system_cursor;
if (system_cursor >= SDL_NUM_SYSTEM_CURSORS) {
system_cursor = 0;
}
updateCursor = SDL_TRUE;
}
if (updateCursor) {
SDL_Log("Changing cursor to \"%s\"", cursorNames[system_cursor]);
SDL_FreeCursor(cursor);
cursor = SDL_CreateSystemCursor((SDL_SystemCursor)system_cursor);
SDL_SetCursor(cursor);
}
}
}
for (i = 0; i < state->num_windows; ++i) {
SDL_Renderer *renderer = state->renderers[i];
SDL_RenderClear(renderer);
SDL_RenderPresent(renderer);
}
#ifdef __EMSCRIPTEN__
if (done) {
emscripten_cancel_main_loop();
}
#endif
}
int
main(int argc, char *argv[])
{
int i;
/* Enable standard application logging */
SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
SDL_assert(SDL_arraysize(cursorNames) == SDL_NUM_SYSTEM_CURSORS);
/* Initialize test framework */
state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
if (!state) {
return 1;
}
for (i = 1; i < argc;) {
int consumed;
consumed = SDLTest_CommonArg(state, i);
if (consumed == 0) {
consumed = -1;
}
if (consumed < 0) {
SDL_Log("Usage: %s %s\n", argv[0], SDLTest_CommonUsage(state));
quit(1);
}
i += consumed;
}
if (!SDLTest_CommonInit(state)) {
quit(2);
}
SDL_EventState(SDL_DROPFILE, SDL_ENABLE);
SDL_EventState(SDL_DROPTEXT, SDL_ENABLE);
for (i = 0; i < state->num_windows; ++i) {
SDL_Renderer *renderer = state->renderers[i];
SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
SDL_RenderClear(renderer);
}
/* Main render loop */
done = 0;
#ifdef __EMSCRIPTEN__
emscripten_set_main_loop(loop, 0, 1);
#else
while (!done) {
loop();
}
#endif
SDL_FreeCursor(cursor);
quit(0);
/* keep the compiler happy ... */
return(0);
}
/* vi: set ts=4 sw=4 expandtab: */