I think you can use clutter animation to do that
Mit freundlichen Grüßen / Best regards BeQIK Charles / Chen Kai RBAC/CM/ESW1-CN -----Original Message----- From: clutter-app-devel-list-boun...@clutter-project.org [mailto:clutter-app-devel-list-boun...@clutter-project.org] On Behalf Of david.sale.75 Sent: Monday, May 14, 2012 2:12 PM To: clutter-app-devel-list@clutter-project.org Subject: Re: Can not get actor width in the thread ? Thanks Lionel, Chen Kai for reply, I mean to create OSD scroll from right To left effect, that must often change X coordinate and the words . If clutter API Is not thread safe, with what method is better? Now I modify the code, can let clutter_text moving to the left, but how to Change the dynamic of thread safe text and get actor width? #include <glib.h> #include <clutter/clutter.h> ClutterActor *gStage, *acttext=NULL; static gboolean osdtextchang=FALSE; static gchar *vgaosdtext=NULL; ClutterColor white = {255, 255, 255, 255}; ClutterColor black = {0, 0, 0, 0}; static gpointer vgaosd_left(gpointer data) { gfloat wc, wx, ww; wx = wc = 650; while (1) { if (vgaosdtext==NULL) { usleep(500); continue; } if (g_strcmp0(vgaosdtext, "")==0) { usleep(500); continue; } osdtextchang = FALSE; clutter_text_set_text(CLUTTER_TEXT(acttext), vgaosdtext); //if use clutter_actor_get_width(acttext); //Pango:ERROR:pango-layout.c:3743:pango_layout_check_lines: assertion failed: (!layout->log_attrs) //ww = clutter_actor_get_width(acttext); while (1) { clutter_actor_set_x(acttext, wx); wx--; //if (wx<=-ww) //because can not get width, only set constants if (wx<=-1200) wx = 650; usleep(50000); //if have changed text , reload if (osdtextchang) break; } } } void vga_osdtext(gchar *str) { //dbg("vga osd: %s \n", str); if (vgaosdtext==NULL) g_free(vgaosdtext); vgaosdtext = g_strdup(str); osdtextchang = TRUE; //change osd text } static gint num=0; static gboolean auto_set_text(gpointer data) { sprintf((gchar*)data, "TEST OSD SCROLL word %d ...", num++); vga_osdtext((gchar*)data); g_print("auto_set_text: %s \n", data); return TRUE; } int main(int argc, char* argv[]) { GThread *threadid; gchar text[128]; g_thread_init(NULL); clutter_threads_init(); clutter_init(&argc, &argv); gStage = clutter_stage_get_default(); clutter_actor_set_size(gStage, 650, 300); clutter_stage_set_color(CLUTTER_STAGE(gStage), &black); sprintf(text, "TEST OSD SCROLL ... ... "); acttext = clutter_text_new_full("Monospace 20", text, &white); clutter_text_set_single_line_mode(CLUTTER_TEXT(acttext), TRUE); clutter_container_add_actor(CLUTTER_CONTAINER(gStage), acttext); clutter_actor_show(gStage); g_timeout_add_seconds(2, auto_set_text, text); threadid = g_thread_create(vgaosd_left, (gpointer)text, FALSE, NULL); clutter_main(); } > The clutter API is not thread safe. You just can't do stuff like that. > > -- > Lionel > > On Sat, 2012-05-12 at 13:28 +0800, david.sale.75 wrote: > > Hi, all: > > > > I write a test demo, use clutter_actor_get_width() get actor width, it > > is correct if in the main thread call, but incorrect in then new thread. > > used clutter-1.6.20 and pango-1.28.4 and glib2-2.28.6 > > > > Pango:ERROR:pango-layout.c:3743:pango_layout_check_lines: assertion > > failed: (!layout->log_attrs) The code is what problem? have any error? Tks. > > > > #include <glib.h> > > #include <clutter/clutter.h> > > ClutterActor *gStage, *acttext=NULL; > > ClutterColor white = {255, 255, 255, 255}; ClutterColor black = {0, 0, > > 0, 0}; > > > > static gpointer test(gpointer data) > > { > > gfloat ww; > > if (acttext) > > clutter_container_remove_actor(CLUTTER_CONTAINER(gStage), acttext); > > acttext = clutter_text_new_full("Monospace 20", (gchar*)data , > > &white); clutter_text_set_single_line_mode(CLUTTER_TEXT(acttext), > > TRUE); clutter_container_add_actor(CLUTTER_CONTAINER(gStage), > > acttext); clutter_actor_set_position(acttext, 100, 100); > > > > //why not get width > > //if use clutter_actor_get_width(acttext); > > //Pango:ERROR:pango-layout.c:3743:pango_layout_check_lines: assertion > > failed: (!layout->log_attrs) clutter_actor_get_width(acttext); > > g_print("act width: %d \n", acttext); > > > > } > > > > int main(int argc, char* argv[]) > > { > > GThread *threadid; > > gchar text[128]; > > g_thread_init(NULL); > > clutter_threads_init(); > > clutter_init(&argc, &argv); > > > > gStage = clutter_stage_get_default(); > > clutter_actor_set_size(gStage, 600, 400); > > clutter_stage_set_color(CLUTTER_STAGE(gStage), &black); > > clutter_actor_show(gStage); sprintf(text, "TEST TEST TEST TEST"); > > threadid = g_thread_create(test, (gpointer)text, FALSE, NULL); > > > > clutter_main(); > > > > } > > > _______________________________________________ > clutter-app-devel-list mailing list > clutter-app-devel-list@clutter-project.org > http://lists.clutter-project.org/listinfo/clutter-app-devel-list _______________________________________________ clutter-app-devel-list mailing list clutter-app-devel-list@clutter-project.org http://lists.clutter-project.org/listinfo/clutter-app-devel-list _______________________________________________ clutter-app-devel-list mailing list clutter-app-devel-list@clutter-project.org http://lists.clutter-project.org/listinfo/clutter-app-devel-list
