Dogcows Code - chaz/tint2/blob - src/systray/systraybar.c

   1 /**************************************************************************
   2 * Tint2 : systraybar
   3 *
   4 * Copyright (C) 2009 thierry lorthiois (lorthiois@bbsoft.fr)
   5 * based on 'docker-1.5' from Ben Jansens.
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License version 2
   9 * as published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program; if not, write to the Free Software
  17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18 **************************************************************************/
  19
  20 #include <X11/Xlib.h>
  21 #include <X11/Xutil.h>
  22 #include <X11/Xatom.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <glib.h>
  27 #include <Imlib2.h>
  28 #include <X11/extensions/Xdamage.h>
  29 #include <X11/extensions/Xcomposite.h>
  30
  31 #include "systraybar.h"
  32 #include "server.h"
  33 #include "panel.h"
  34
  35 GSList *icons;
  36
  37 /* defined in the systray spec */
  38 #define SYSTEM_TRAY_REQUEST_DOCK    0
  39 #define SYSTEM_TRAY_BEGIN_MESSAGE   1
  40 #define SYSTEM_TRAY_CANCEL_MESSAGE  2
  41
  42 // selection window
  43 Window net_sel_win = None;
  44
  45 // freedesktop specification doesn't allow multi systray
  46 Systraybar systray;
  47 int refresh_systray;
  48 int systray_enabled;
  49 int systray_max_icon_size = 0;
  50
  51 // background pixmap if we render ourselves the icons
  52 static Pixmap render_background = 0;
  53
  54
  55 void init_systray()
  56 {
  57         start_net();
  58
  59         if (!systray_enabled)
  60                 return;
  61
  62         systray.area._draw_foreground = draw_systray;
  63         systray.area._resize = resize_systray;
  64         systray.area.resize = 1;
  65         systray.area.redraw = 1;
  66         systray.area.on_screen = 1;
  67         refresh_systray = 0;
  68 }
  69
  70
  71 void init_systray_panel(void *p)
  72 {
  73         Panel *panel =(Panel*)p;
  74
  75         if (panel_horizontal) {
  76                 systray.area.posy = panel->area.bg->border.width + panel->area.paddingy;
  77                 systray.area.height = panel->area.height - (2 * systray.area.posy);
  78         }
  79         else {
  80                 systray.area.posx = panel->area.bg->border.width + panel->area.paddingy;
  81                 systray.area.width = panel->area.width - (2 * panel->area.bg->border.width) - (2 * panel->area.paddingy);
  82         }
  83         systray.area.parent = p;
  84         systray.area.panel = p;
  85 }
  86
  87
  88 void cleanup_systray()
  89 {
  90         systray_enabled = 0;
  91         systray.area.on_screen = 0;
  92         free_area(&systray.area);
  93         if (render_background) XFreePixmap(server.dsp, render_background);
  94 }
  95
  96
  97 void draw_systray(void *obj, cairo_t *c)
  98 {
  99         if (real_transparency || systray.alpha != 100 || systray.brightness != 0 || systray.saturation != 0) {
 100                 if (render_background) XFreePixmap(server.dsp, render_background);
 101                 render_background = XCreatePixmap(server.dsp, server.root_win, systray.area.width, systray.area.height, server.depth);
 102                 XCopyArea(server.dsp, systray.area.pix, render_background, server.gc, 0, 0, systray.area.width, systray.area.height, 0, 0);
 103         }
 104
 105         refresh_systray = 1;
 106 }
 107
 108
 109 void resize_systray(void *obj)
 110 {
 111         Systraybar *sysbar = obj;
 112         Panel *panel = sysbar->area.panel;
 113         TrayWindow *traywin;
 114         GSList *l;
 115         int count, icon_size;
 116         int icons_per_column=1, icons_per_row=1, marging=0;
 117
 118         if (panel_horizontal)
 119                 icon_size = sysbar->area.height;
 120         else
 121                 icon_size = sysbar->area.width;
 122         icon_size = icon_size - (2 * sysbar->area.bg->border.width) - (2 * sysbar->area.paddingy);
 123         if (systray_max_icon_size > 0 && icon_size > systray_max_icon_size)
 124                 icon_size = systray_max_icon_size;
 125         count = 0;
 126         for (l = systray.list_icons; l ; l = l->next) {
 127                 if (!((TrayWindow*)l->data)->hide)
 128                         count++;
 129         }
 130         //printf("count %d\n", count);
 131
 132         if (panel_horizontal) {
 133                 if (!count) systray.area.width = 0;
 134                 else {
 135                         int height = sysbar->area.height - 2*sysbar->area.bg->border.width - 2*sysbar->area.paddingy;
 136                         // here icons_per_column always higher than 0
 137                         icons_per_column = (height+sysbar->area.paddingx) / (icon_size+sysbar->area.paddingx);
 138                         marging = height - (icons_per_column-1)*(icon_size+sysbar->area.paddingx) - icon_size;
 139                         icons_per_row = count / icons_per_column + (count%icons_per_column != 0);
 140                         systray.area.width = (2 * systray.area.bg->border.width) + (2 * systray.area.paddingxlr) + (icon_size * icons_per_row) + ((icons_per_row-1) * systray.area.paddingx);
 141                 }
 142
 143                 systray.area.posx = panel->area.width - panel->area.bg->border.width - panel->area.paddingxlr - systray.area.width;
 144                 if (panel->clock.area.on_screen)
 145                         systray.area.posx -= (panel->clock.area.width + panel->area.paddingx);
 146 #ifdef ENABLE_BATTERY
 147                 if (panel->battery.area.on_screen)
 148                         systray.area.posx -= (panel->battery.area.width + panel->area.paddingx);
 149 #endif
 150         }
 151         else {
 152                 if (!count) systray.area.height = 0;
 153                 else {
 154                         int width = sysbar->area.width - 2*sysbar->area.bg->border.width - 2*sysbar->area.paddingy;
 155                         // here icons_per_row always higher than 0
 156                         icons_per_row = (width+sysbar->area.paddingx) / (icon_size+sysbar->area.paddingx);
 157                         marging = width - (icons_per_row-1)*(icon_size+sysbar->area.paddingx) - icon_size;
 158                         icons_per_column = count / icons_per_row+ (count%icons_per_row != 0);
 159                         systray.area.height = (2 * systray.area.bg->border.width) + (2 * systray.area.paddingxlr) + (icon_size * icons_per_column) + ((icons_per_column-1) * systray.area.paddingx);
 160                 }
 161
 162                 systray.area.posy = panel->area.bg->border.width + panel->area.paddingxlr;
 163                 if (panel->clock.area.on_screen)
 164                         systray.area.posy += (panel->clock.area.height + panel->area.paddingx);
 165 #ifdef ENABLE_BATTERY
 166                 if (panel->battery.area.on_screen)
 167                         systray.area.posy += (panel->battery.area.height + panel->area.paddingx);
 168 #endif
 169         }
 170
 171         int i, posx, posy;
 172         int start = panel->area.bg->border.width + panel->area.paddingy + systray.area.bg->border.width + systray.area.paddingy +marging/2;
 173         if (panel_horizontal) {
 174                 posy = start;
 175                 posx = systray.area.posx + systray.area.bg->border.width + systray.area.paddingxlr;
 176         }
 177         else {
 178                 posx = start;
 179                 posy = systray.area.posy + systray.area.bg->border.width + systray.area.paddingxlr;
 180         }
 181
 182         for (i=1, l = systray.list_icons; l ; i++, l = l->next) {
 183                 traywin = (TrayWindow*)l->data;
 184                 if (traywin->hide) continue;
 185
 186                 traywin->y = posy;
 187                 traywin->x = posx;
 188                 traywin->width = icon_size;
 189                 traywin->height = icon_size;
 190                 if (panel_horizontal) {
 191                         if (i % icons_per_column)
 192                                 posy += icon_size + sysbar->area.paddingx;
 193                         else {
 194                                 posy = start;
 195                                 posx += (icon_size + systray.area.paddingx);
 196                         }
 197                 }
 198                 else {
 199                         if (i % icons_per_row)
 200                                 posx += icon_size + systray.area.paddingx;
 201                         else {
 202                                 posx = start;
 203                                 posy += (icon_size + systray.area.paddingx);
 204                         }
 205                 }
 206
 207                 // position and size the icon window
 208                 XMoveResizeWindow(server.dsp, traywin->id, traywin->x, traywin->y, icon_size, icon_size);
 209                 XResizeWindow(server.dsp, traywin->tray_id, icon_size, icon_size);
 210         }
 211 }
 212
 213
 214 // ***********************************************
 215 // systray protocol
 216
 217 void start_net()
 218 {
 219         if (net_sel_win) {
 220                 // protocol already started
 221                 if (!systray_enabled)
 222                         stop_net();
 223                 return;
 224         }
 225         else
 226                 if (!systray_enabled)
 227                         return;
 228
 229         Window win = XGetSelectionOwner(server.dsp, server.atom._NET_SYSTEM_TRAY_SCREEN);
 230
 231         // freedesktop systray specification
 232         if (win != None) {
 233                 // search pid
 234                 Atom _NET_WM_PID, actual_type;
 235                 int actual_format;
 236                 unsigned long nitems;
 237                 unsigned long bytes_after;
 238                 unsigned char *prop = 0;
 239                 int pid;
 240
 241                 _NET_WM_PID = XInternAtom(server.dsp, "_NET_WM_PID", True);
 242                 int ret = XGetWindowProperty(server.dsp, win, _NET_WM_PID, 0, 1024, False, AnyPropertyType, &actual_type, &actual_format, &nitems, &bytes_after, &prop);
 243
 244                 fprintf(stderr, "tint2 : another systray is running");
 245                 if (ret == Success && prop) {
 246                         pid = prop[1] * 256;
 247                         pid += prop[0];
 248                         fprintf(stderr, " pid=%d", pid);
 249                 }
 250                 fprintf(stderr, "\n");
 251                 return;
 252         }
 253
 254         // init systray protocol
 255         net_sel_win = XCreateSimpleWindow(server.dsp, server.root_win, -1, -1, 1, 1, 0, 0, 0);
 256
 257         // v0.3 trayer specification. tint2 always horizontal.
 258         // Vertical panel will draw the systray horizontal.
 259         int orient = 0;
 260         XChangeProperty(server.dsp, net_sel_win, server.atom._NET_SYSTEM_TRAY_ORIENTATION, XA_CARDINAL, 32, PropModeReplace, (unsigned char *) &orient, 1);
 261         VisualID vid = XVisualIDFromVisual(server.visual);
 262         XChangeProperty(server.dsp, net_sel_win, XInternAtom(server.dsp, "_NET_SYSTEM_TRAY_VISUAL", False), XA_VISUALID, 32, PropModeReplace, (unsigned char*)&vid, 1);
 263
 264         XSetSelectionOwner(server.dsp, server.atom._NET_SYSTEM_TRAY_SCREEN, net_sel_win, CurrentTime);
 265         if (XGetSelectionOwner(server.dsp, server.atom._NET_SYSTEM_TRAY_SCREEN) != net_sel_win) {
 266                 stop_net();
 267                 fprintf(stderr, "tint2 : can't get systray manager\n");
 268                 return;
 269         }
 270
 271         //fprintf(stderr, "tint2 : systray started\n");
 272         XClientMessageEvent ev;
 273         ev.type = ClientMessage;
 274         ev.window = server.root_win;
 275         ev.message_type = server.atom.MANAGER;
 276         ev.format = 32;
 277         ev.data.l[0] = CurrentTime;
 278         ev.data.l[1] = server.atom._NET_SYSTEM_TRAY_SCREEN;
 279         ev.data.l[2] = net_sel_win;
 280         ev.data.l[3] = 0;
 281         ev.data.l[4] = 0;
 282         XSendEvent(server.dsp, server.root_win, False, StructureNotifyMask, (XEvent*)&ev);
 283 }
 284
 285
 286 void stop_net()
 287 {
 288         //fprintf(stderr, "tint2 : systray stopped\n");
 289         if (systray.list_icons) {
 290                 // remove_icon change systray.list_icons
 291                 while(systray.list_icons)
 292                         remove_icon((TrayWindow*)systray.list_icons->data);
 293
 294                 g_slist_free(systray.list_icons);
 295                 systray.list_icons = 0;
 296         }
 297
 298         if (net_sel_win != None) {
 299                 XDestroyWindow(server.dsp, net_sel_win);
 300                 net_sel_win = None;
 301         }
 302 }
 303
 304
 305 gboolean error;
 306 int window_error_handler(Display *d, XErrorEvent *e)
 307 {
 308         d=d;e=e;
 309         error = TRUE;
 310         if (e->error_code != BadWindow) {
 311                 printf("error_handler %d\n", e->error_code);
 312         }
 313         return 0;
 314 }
 315
 316
 317 static gint compare_traywindows(gconstpointer a, gconstpointer b)
 318 {
 319         const TrayWindow * traywin_a = (TrayWindow*)a;
 320         const TrayWindow * traywin_b = (TrayWindow*)b;
 321         XTextProperty name_a, name_b;
 322
 323         if(XGetWMName(server.dsp, traywin_a->tray_id, &name_a) == 0) {
 324                 return -1;
 325         }
 326         else if(XGetWMName(server.dsp, traywin_b->tray_id, &name_b) == 0) {
 327                 XFree(name_a.value);
 328                 return 1;
 329         }
 330         else {
 331                 gint retval = g_ascii_strncasecmp((char*)name_a.value, (char*)name_b.value, -1) * systray.sort;
 332                 XFree(name_a.value);
 333                 XFree(name_b.value);
 334                 return retval;
 335         }
 336 }
 337
 338
 339 gboolean add_icon(Window id)
 340 {
 341         TrayWindow *traywin;
 342         XErrorHandler old;
 343         Panel *panel = systray.area.panel;
 344         int hide = 0;
 345
 346         error = FALSE;
 347         XWindowAttributes attr;
 348 /*      GSList *l;
 349         printf("add_icon\n");
 350         for (l = systray.list_icons; l ; l = l->next) {
 351                 traywin = (TrayWindow*)l->data;
 352                 //if (traywin->hide) continue;
 353
 354                 XGetWindowAttributes(server.dsp, traywin->tray_id, &attr);
 355                 printf("  icon %lx, depth %d, width %d, height %d\n", traywin->tray_id, attr.depth, attr.width, attr.height);
 356         }*/
 357         XGetWindowAttributes(server.dsp, id, &attr);
 358         //printf("last icon %lx, depth %d, width %d, height %d\n", id, attr.depth, attr.width, attr.height);
 359         unsigned long mask = 0;
 360         XSetWindowAttributes set_attr;
 361         if (attr.depth != server.depth || systray.alpha != 100 || systray.brightness != 0 || systray.saturation != 0 ) {
 362                 set_attr.colormap = attr.colormap;
 363                 set_attr.background_pixel = 0;
 364                 set_attr.border_pixel = 0;
 365                 mask = CWColormap|CWBackPixel|CWBorderPixel;
 366         }
 367         else {
 368                 set_attr.background_pixmap = ParentRelative;
 369                 mask = CWBackPixmap;
 370         }
 371         Window parent_window;
 372         parent_window = XCreateWindow(server.dsp, panel->main_win, 0, 0, 30, 30, 0, attr.depth, InputOutput, attr.visual, mask, &set_attr);
 373         old = XSetErrorHandler(window_error_handler);
 374         XReparentWindow(server.dsp, id, parent_window, 0, 0);
 375         XSync(server.dsp, False);
 376         XSetErrorHandler(old);
 377         if (error != FALSE) {
 378                 fprintf(stderr, "tint2 : not icon_swallow\n");
 379                 XDestroyWindow(server.dsp, parent_window);
 380                 return FALSE;
 381         }
 382
 383         {
 384                 Atom acttype;
 385                 int actfmt;
 386                 unsigned long nbitem, bytes;
 387                 unsigned char *data = 0;
 388                 int ret;
 389
 390                 ret = XGetWindowProperty(server.dsp, id, server.atom._XEMBED_INFO, 0, 2, False, server.atom._XEMBED_INFO, &acttype, &actfmt, &nbitem, &bytes, &data);
 391                 if (ret == Success) {
 392                         if (data) {
 393                                 if (nbitem == 2) {
 394                                         //hide = ((data[1] & XEMBED_MAPPED) == 0);
 395                                         //printf("hide %d\n", hide);
 396                                 }
 397                                 XFree(data);
 398                         }
 399                 }
 400                 else {
 401                         fprintf(stderr, "tint2 : xembed error\n");
 402                         XDestroyWindow(server.dsp, parent_window);
 403                         return FALSE;
 404                 }
 405         }
 406         {
 407                 XEvent e;
 408                 e.xclient.type = ClientMessage;
 409                 e.xclient.serial = 0;
 410                 e.xclient.send_event = True;
 411                 e.xclient.message_type = server.atom._XEMBED;
 412                 e.xclient.window = id;
 413                 e.xclient.format = 32;
 414                 e.xclient.data.l[0] = CurrentTime;
 415                 e.xclient.data.l[1] = XEMBED_EMBEDDED_NOTIFY;
 416                 e.xclient.data.l[2] = 0;
 417                 e.xclient.data.l[3] = parent_window;
 418                 e.xclient.data.l[4] = 0;
 419                 XSendEvent(server.dsp, id, False, 0xFFFFFF, &e);
 420         }
 421
 422         traywin = g_new0(TrayWindow, 1);
 423         traywin->id = parent_window;
 424         traywin->tray_id = id;
 425         traywin->hide = hide;
 426         traywin->depth = attr.depth;
 427         traywin->damage = 0;
 428
 429         if (systray.sort == 3)
 430                 systray.list_icons = g_slist_prepend(systray.list_icons, traywin);
 431         else if (systray.sort == 2)
 432                 systray.list_icons = g_slist_append(systray.list_icons, traywin);
 433         else
 434                 systray.list_icons = g_slist_insert_sorted(systray.list_icons, traywin, compare_traywindows);
 435         systray.area.resize = 1;
 436         systray.area.redraw = 1;
 437         //printf("add_icon id %lx, %d\n", id, g_slist_length(systray.list_icons));
 438
 439         // watch for the icon trying to resize itself!
 440         XSelectInput(server.dsp, traywin->tray_id, StructureNotifyMask);
 441         if (real_transparency || systray.alpha != 100 || systray.brightness != 0 || systray.saturation != 0) {
 442                 traywin->damage = XDamageCreate(server.dsp, traywin->id, XDamageReportNonEmpty);
 443                 XCompositeRedirectWindow(server.dsp, traywin->id, CompositeRedirectManual);
 444         }
 445
 446         // show the window
 447         if (!traywin->hide)
 448                 XMapWindow(server.dsp, traywin->tray_id);
 449         if (!traywin->hide && !panel->is_hidden)
 450                 XMapRaised(server.dsp, traywin->id);
 451
 452         // changed in systray force resize on panel
 453         panel->area.resize = 1;
 454         panel_refresh = 1;
 455         return TRUE;
 456 }
 457
 458
 459 void remove_icon(TrayWindow *traywin)
 460 {
 461         XErrorHandler old;
 462
 463         // remove from our list
 464         systray.list_icons = g_slist_remove(systray.list_icons, traywin);
 465         systray.area.resize = 1;
 466         systray.area.redraw = 1;
 467         //printf("remove_icon id %lx, %d\n", traywin->id);
 468
 469         XSelectInput(server.dsp, traywin->tray_id, NoEventMask);
 470         if (traywin->damage)
 471                 XDamageDestroy(server.dsp, traywin->damage);
 472
 473         // reparent to root
 474         error = FALSE;
 475         old = XSetErrorHandler(window_error_handler);
 476         if (!traywin->hide)
 477                 XUnmapWindow(server.dsp, traywin->tray_id);
 478         XReparentWindow(server.dsp, traywin->tray_id, server.root_win, 0, 0);
 479         XDestroyWindow(server.dsp, traywin->id);
 480         XSync(server.dsp, False);
 481         XSetErrorHandler(old);
 482         g_free(traywin);
 483
 484         // changed in systray force resize on panel
 485         Panel *panel = systray.area.panel;
 486         panel->area.resize = 1;
 487         panel_refresh = 1;
 488 }
 489
 490
 491 void net_message(XClientMessageEvent *e)
 492 {
 493         unsigned long opcode;
 494         Window id;
 495
 496         opcode = e->data.l[1];
 497         switch (opcode) {
 498                 case SYSTEM_TRAY_REQUEST_DOCK:
 499                         id = e->data.l[2];
 500                         if (id) add_icon(id);
 501                         break;
 502
 503                 case SYSTEM_TRAY_BEGIN_MESSAGE:
 504                 case SYSTEM_TRAY_CANCEL_MESSAGE:
 505                         // we don't show baloons messages.
 506                         break;
 507
 508                 default:
 509                         if (opcode == server.atom._NET_SYSTEM_TRAY_MESSAGE_DATA)
 510                                 printf("message from dockapp: %s\n", e->data.b);
 511                         else
 512                                 fprintf(stderr, "SYSTEM_TRAY : unknown message type\n");
 513                         break;
 514         }
 515 }
 516
 517 void systray_render_icon_now(void* t)
 518 {
 519         TrayWindow* traywin = t;
 520         traywin->render_timeout = 0;
 521
 522         // good systray icons support 32 bit depth, but some icons are still 24 bit.
 523         // We create a heuristic mask for these icons, i.e. we get the rgb value in the top left corner, and
 524         // mask out all pixel with the same rgb value
 525         Panel* panel = systray.area.panel;
 526         imlib_context_set_drawable(traywin->id);
 527         Imlib_Image image = imlib_create_image_from_drawable(0, 0, 0, traywin->width, traywin->height, 0);
 528         if (image == 0)
 529                 return;
 530
 531         imlib_context_set_image(image);
 532         imlib_image_set_has_alpha(1);
 533         DATA32* data = imlib_image_get_data();
 534         if (traywin->depth == 24) {
 535                 createHeuristicMask(data, traywin->width, traywin->height);
 536         }
 537         if (systray.alpha != 100 || systray.brightness != 0 || systray.saturation != 0)
 538                 adjust_asb(data, traywin->width, traywin->height, systray.alpha, (float)systray.saturation/100, (float)systray.brightness/100);
 539         imlib_image_put_back_data(data);
 540         XCopyArea(server.dsp, render_background, systray.area.pix, server.gc, traywin->x-systray.area.posx, traywin->y-systray.area.posy, traywin->width, traywin->height, traywin->x-systray.area.posx, traywin->y-systray.area.posy);
 541         if ( !real_transparency ) {
 542                 imlib_context_set_drawable(systray.area.pix);
 543                 imlib_render_image_on_drawable(traywin->x-systray.area.posx, traywin->y-systray.area.posy);
 544         }
 545         else {
 546                 render_image(systray.area.pix, traywin->x-systray.area.posx, traywin->y-systray.area.posy, traywin->width, traywin->height);
 547         }
 548         XCopyArea(server.dsp, systray.area.pix, panel->main_win, server.gc, traywin->x-systray.area.posx, traywin->y-systray.area.posy, traywin->width, traywin->height, traywin->x, traywin->y);
 549         imlib_free_image_and_decache();
 550
 551         XDamageSubtract(server.dsp, traywin->damage, None, None);
 552         XFlush(server.dsp);
 553 }
 554
 555
 556 void systray_render_icon(TrayWindow* traywin)
 557 {
 558         // wine tray icons update whenever mouse is over them, so we limit the updates to 50 ms
 559         if (traywin->render_timeout == 0)
 560                 traywin->render_timeout = add_timeout(50, 0, systray_render_icon_now, traywin);
 561 }
 562
 563
 564 void refresh_systray_icon()
 565 {
 566         TrayWindow *traywin;
 567         GSList *l;
 568         for (l = systray.list_icons; l ; l = l->next) {
 569                 traywin = (TrayWindow*)l->data;
 570                 if (traywin->hide) continue;
 571                 if (real_transparency || systray.alpha != 100 || systray.brightness != 0 || systray.saturation != 0)
 572                         systray_render_icon(traywin);
 573                 else {
 574                         // comment by andreas: I'm still not sure, what exactly we need to do here... Somehow trayicons which do not
 575                         // offer the same depth as tint2 does, need to draw a background pixmap, but this cannot be done with
 576                         // XCopyArea... So we actually need XRenderComposite???
 577 //                      Pixmap pix = XCreatePixmap(server.dsp, server.root_win, traywin->width, traywin->height, server.depth);
 578 //                      XCopyArea(server.dsp, panel->temp_pmap, pix, server.gc, traywin->x, traywin->y, traywin->width, traywin->height, 0, 0);
 579 //                      XSetWindowBackgroundPixmap(server.dsp, traywin->id, pix);
 580                         XClearArea(server.dsp, traywin->tray_id, 0, 0, traywin->width, traywin->height, True);
 581                 }
 582         }
 583 }