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Added SDL_DROPBEGIN and SDL_DROPCOMPLETE events, plus window IDs for drops.

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This allows an app to know when a set of drops are coming in a grouping of
some sort (for example, a user selected multiple files and dropped them all
on the window with a single drag), and when that set is complete.

This also adds a window ID to the drop events, so the app can determine to
which window a given drop was delivered. For application-level drops (for
example, you launched an app by dropping a file on its icon), the window ID
will be zero.
This commit is contained in:
Ryan C. Gordon
2016-01-05 01:42:00 -05:00
parent f2defe5e11
commit 8e855f2fbc
9 changed files with 79 additions and 20 deletions
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51
src/events/SDL_dropevents.c
View File

@@ -26,34 +26,69 @@
#include "SDL_events_c.h"
#include "SDL_dropevents_c.h"
#include "../video/SDL_sysvideo.h" /* for SDL_Window internals. */
static int
SDL_SendDrop(const SDL_EventType evtype, const char *data)
SDL_SendDrop(SDL_Window *window, const SDL_EventType evtype, const char *data)
{
int posted;
static SDL_bool app_is_dropping = SDL_FALSE;
int posted = 0;
/* Post the event, if desired */
posted = 0;
if (SDL_GetEventState(evtype) == SDL_ENABLE) {
const SDL_bool need_begin = window ? !window->is_dropping : !app_is_dropping;
SDL_Event event;
if (need_begin) {
SDL_zero(event);
event.type = SDL_DROPBEGIN;
event.drop.windowID = window->id;
posted = (SDL_PushEvent(&event) > 0);
if (!posted) {
return 0;
}
if (window) {
window->is_dropping = SDL_TRUE;
} else {
app_is_dropping = SDL_TRUE;
}
}
SDL_zero(event);
event.type = evtype;
event.drop.file = SDL_strdup(data);
event.drop.file = data ? SDL_strdup(data) : NULL;
event.drop.windowID = window ? window->id : 0;
posted = (SDL_PushEvent(&event) > 0);
if (posted && (evtype == SDL_DROPCOMPLETE)) {
if (window) {
window->is_dropping = SDL_FALSE;
} else {
app_is_dropping = SDL_FALSE;
}
}
}
return posted;
}
int
SDL_SendDropFile(const char *file)
SDL_SendDropFile(SDL_Window *window, const char *file)
{
return SDL_SendDrop(SDL_DROPFILE, file);
return SDL_SendDrop(window, SDL_DROPFILE, file);
}
int
SDL_SendDropText(const char *text)
SDL_SendDropText(SDL_Window *window, const char *text)
{
return SDL_SendDrop(SDL_DROPTEXT, text);
return SDL_SendDrop(window, SDL_DROPTEXT, text);
}
int
SDL_SendDropComplete(SDL_Window *window)
{
return SDL_SendDrop(window, SDL_DROPCOMPLETE, NULL);
}
/* vi: set ts=4 sw=4 expandtab: */

5
src/events/SDL_dropevents_c.h
View File

@@ -23,8 +23,9 @@
#ifndef _SDL_dropevents_c_h
#define _SDL_dropevents_c_h
extern int SDL_SendDropFile(const char *file);
extern int SDL_SendDropText(const char *text);
extern int SDL_SendDropFile(SDL_Window *window, const char *file);
extern int SDL_SendDropText(SDL_Window *window, const char *text);
extern int SDL_SendDropComplete(SDL_Window *window);
#endif /* _SDL_dropevents_c_h */