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

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
include/SDL_events.h
View File

@ -137,6 +137,8 @@ typedef enum
/* Drag and drop events */
SDL_DROPFILE = 0x1000, /**< The system requests a file open */
SDL_DROPTEXT, /**< text/plain drag-and-drop event */
SDL_DROPBEGIN, /**< A new set of drops is beginning (NULL filename) */
SDL_DROPCOMPLETE, /**< Current set of drops is now complete (NULL filename) */
/* Audio hotplug events */
SDL_AUDIODEVICEADDED = 0x1100, /**< A new audio device is available */
@ -462,9 +464,10 @@ typedef struct SDL_DollarGestureEvent
*/
typedef struct SDL_DropEvent
{
Uint32 type; /**< ::SDL_DROPFILE */
Uint32 type; /**< ::SDL_DROPBEGIN or ::SDL_DROPFILE or ::SDL_DROPTEXT or ::SDL_DROPCOMPLETE */
Uint32 timestamp;
char *file; /**< The file name, which should be freed with SDL_free() */
char *file; /**< The file name, which should be freed with SDL_free(), is NULL on begin/complete */
Uint32 windowID; /**< The window that was dropped on, if any */
} SDL_DropEvent;

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 */

1
src/video/SDL_sysvideo.h
View File

@ -95,6 +95,7 @@ struct SDL_Window
SDL_bool is_hiding;
SDL_bool is_destroying;
SDL_bool is_dropping; /* drag/drop in progress, expecting SDL_SendDropComplete(). */
SDL_WindowShaper *shaper;

2
src/video/cocoa/SDL_cocoaevents.m
View File

@ -176,7 +176,7 @@
- (BOOL)application:(NSApplication *)theApplication openFile:(NSString *)filename
{
return (BOOL)SDL_SendDropFile([filename UTF8String]);
return (BOOL)SDL_SendDropFile(NULL, [filename UTF8String]) && SDL_SendDropComplete(NULL);
}
@end

16
src/video/cocoa/SDL_cocoawindow.m
View File

@ -116,9 +116,12 @@
- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
{ @autoreleasepool
{
SDL_VideoDevice *_this = SDL_GetVideoDevice();
NSPasteboard *pasteboard = [sender draggingPasteboard];
NSArray *types = [NSArray arrayWithObject:NSFilenamesPboardType];
NSString *desiredType = [pasteboard availableTypeFromArray:types];
SDL_Window *sdlwindow = nil;
if (desiredType == nil) {
return NO; /* can't accept anything that's being dropped here. */
}
@ -157,11 +160,22 @@
}
}
if (!SDL_SendDropFile([[fileURL path] UTF8String])) {
/* !!! FIXME: is there a better way to do this? */
if (_this) {
for (sdlwindow = _this->windows; sdlwindow; sdlwindow = sdlwindow->next) {
NSWindow *nswindow = ((SDL_WindowData *) sdlwindow->driverdata)->nswindow;
if (nswindow == self) {
break;
}
}
}
if (!SDL_SendDropFile(sdlwindow, [[fileURL path] UTF8String])) {
return NO;
}
}
SDL_SendDropComplete(sdlwindow);
return YES;
}}

3
src/video/windows/SDL_windowsevents.c
View File

@ -907,12 +907,13 @@ WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
if (buffer) {
if (DragQueryFile(drop, i, buffer, size)) {
char *file = WIN_StringToUTF8(buffer);
SDL_SendDropFile(file);
SDL_SendDropFile(data->window, file);
SDL_free(file);
}
SDL_stack_free(buffer);
}
}
SDL_SendDropComplete(data->window);
DragFinish(drop);
return 0;
}

6
src/video/x11/SDL_x11events.c
View File

@ -1230,17 +1230,17 @@ X11_DispatchEvent(_THIS)
char *token = strtok((char *) p.data, "\r\n");
while (token != NULL) {
if (SDL_strcmp("text/plain", name)==0) {
SDL_SendDropText(token);
SDL_SendDropText(data->window, token);
} else if (SDL_strcmp("text/uri-list", name)==0) {
char *fn = X11_URIToLocal(token);
if (fn) {
SDL_SendDropFile(fn);
SDL_SendDropFile(data->window, fn);
}
}
token = strtok(NULL, "\r\n");
}
SDL_SendDropComplete(data->window);
}
X11_XFree(p.data);
/* send reply */

8
test/testdropfile.c
View File

@ -77,10 +77,14 @@ main(int argc, char *argv[])
while (SDL_PollEvent(&event)) {
SDLTest_CommonEvent(state, &event, &done);
if ((event.type == SDL_DROPFILE) || (event.type == SDL_DROPTEXT)) {
if (event.type == SDL_DROPBEGIN) {
SDL_Log("Drop beginning on window %u", (unsigned int) event.drop.windowID);
} else if (event.type == SDL_DROPCOMPLETE) {
SDL_Log("Drop complete on window %u", (unsigned int) event.drop.windowID);
} else if ((event.type == SDL_DROPFILE) || (event.type == SDL_DROPTEXT)) {
const char *typestr = (event.type == SDL_DROPFILE) ? "File" : "Text";
char *dropped_filedir = event.drop.file;
SDL_Log("%s dropped on window: %s", typestr, dropped_filedir);
SDL_Log("%s dropped on window %u: %s", typestr, (unsigned int) event.drop.windowID, dropped_filedir);
SDL_free(dropped_filedir);
}
}