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add callback called when window regains focus

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I need to redraw the canvas then, but haven't figured out yet.
This commit is contained in:
Eric House 2021-02-25 06:43:26 -08:00
parent fa8bcd3c2c
commit 4eede76780
2 changed files with 26 additions and 6 deletions
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24
xwords4/wasm/main.c
View file

@ -161,9 +161,12 @@ EM_JS(void, call_get_string, (const char* msg, const char* dflt,
} );
EM_JS(void, call_haveDevID, (void* closure, const char* devid,
const char* gitrev, int now, StringProc proc), {
const char* gitrev, int now,
StringProc conflictProc,
StringProc focussedProc ), {
let jsgr = UTF8ToString(gitrev);
onHaveDevID(closure, UTF8ToString(devid), jsgr, now, proc);
onHaveDevID(closure, UTF8ToString(devid), jsgr, now,
conflictProc, focussedProc);
});
EM_JS(bool, call_mqttSend, (const char* topic, const uint8_t* ptr, int len), {
@ -610,11 +613,24 @@ updateDeviceButtons( Globals* globals )
static void
onConflict( void* closure, const char* ignored )
{
Globals* globals = (Globals*)closure;
CAST_GLOB(Globals*, globals, closure);
call_alert( "Control passed to another tab" );
XP_MEMSET( globals, 0, sizeof(*globals) ); /* stop everything :-) */
}
static void
onFocussed( void* closure, const char* ignored )
{
XP_LOGFF("Need to refresh...");
/* This hasn't worked.... */
/* CAST_GLOB(Globals*, globals, closure); */
/* GameState* gs = getCurGame( globals ); */
/* if ( !!gs ) { */
/* board_invalAll( gs->game.board ); */
/* updateScreen( gs, false ); */
/* } */
}
static void
initDeviceGlobals( Globals* globals )
{
@ -647,7 +663,7 @@ initDeviceGlobals( Globals* globals )
XP_SNPRINTF( buf, VSIZE(buf), MQTTDevID_FMT, devID );
XP_LOGFF( "got mqtt devID: %s", buf );
int now = dutil_getCurSeconds( globals->dutil, NULL );
call_haveDevID( globals, buf, GITREV, now, onConflict );
call_haveDevID( globals, buf, GITREV, now, onConflict, onFocussed );
}
static void

8
xwords4/wasm/xwutils.js
View file

@ -45,7 +45,7 @@ function registerOnce(devid, gitrev, now) {
}
}
function onHaveDevID(closure, devid, gitrev, now, proc) {
function onHaveDevID(closure, devid, gitrev, now, noTabProc, focusProc) {
// Set a unique tag so we know if somebody comes along later
let tabID = Math.random();
localStorage.setItem('tabID', tabID);
@ -53,12 +53,16 @@ function onHaveDevID(closure, devid, gitrev, now, proc) {
newTabID = localStorage.getItem('tabID');
if ( newTabID != tabID ) {
state.client.disconnect();
ccallString(proc, state.closure, '');
ccallString(noTabProc, state.closure, '');
window.removeEventListener('storage', listener);
}
};
window.addEventListener('storage', listener);
window.onfocus = function () {
ccallString(focusProc, state.closure, '');
};
registerOnce(devid, gitrev, now);
state.closure = closure;