diff --git a/src/battery/battery.c b/src/battery/battery.c
index 8fd6aa0..086b6d0 100644
--- a/src/battery/battery.c
+++ b/src/battery/battery.c
@@ -73,17 +73,20 @@ void update_batterys(void* arg)
 		if (battery_state.percentage >= percentage_hide) {
 			if (panel1[i].battery.area.on_screen == 1) {
 				panel1[i].battery.area.on_screen = 0;
+				panel1[i].area.resize = 1;
 				panel_refresh = 1;
 			}
-			continue;
 		}
 		else {
 			if (panel1[i].battery.area.on_screen == 0) {
 				panel1[i].battery.area.on_screen = 1;
-				panel_refresh = 1;
+				panel1[i].area.resize = 1;
 			}
 		}
-		panel1[i].battery.area.resize = 1;
+		if (panel1[i].battery.area.on_screen == 1) {
+			panel1[i].battery.area.resize = 1;
+			panel_refresh = 1;
+		}
 	}
 }
 
@@ -448,7 +451,6 @@ int resize_battery(void *obj)
 
 	percentage_width = time_width = 0;
 	battery->area.redraw = 1;
-
 	snprintf(buf_bat_percentage, sizeof(buf_bat_percentage), "%d%%", battery_state.percentage);
 	if(battery_state.state == BATTERY_FULL) {
 		strcpy(buf_bat_time, "Full");
diff --git a/src/clock/clock.c b/src/clock/clock.c
index 783f7e9..70babb6 100644
--- a/src/clock/clock.c
+++ b/src/clock/clock.c
@@ -151,8 +151,11 @@ void init_clock_panel(void *p)
 	clock->area._resize = resize_clock;
 	clock->area.resize = 1;
 	clock->area.redraw = 1;
-	clock->area.on_screen = 1;
+	// check consistency
+	if (time1_format == 0)
+		return;
 
+	clock->area.on_screen = 1;
 	strftime(buf_time, sizeof(buf_time), time1_format, clock_gettime_for_tz(time1_timezone));
 	get_text_size(time1_font_desc, &time_height_ink, &time_height, panel->area.height, buf_time, strlen(buf_time));
 	if (time2_format) {
@@ -167,8 +170,6 @@ void init_clock_panel(void *p)
 	}
 	else {
 		// panel vertical => fixed width, height, posy and posx
-//		clock->area.posy = panel->area.bg->border.width + panel->area.paddingxlr;
-//		clock->area.height = (2 * clock->area.paddingxlr) + (time_height + date_height);
 		clock->area.posx = panel->area.bg->border.width + panel->area.paddingy;
 		clock->area.width = panel->area.width - (2 * panel->area.bg->border.width) - (2 * panel->area.paddingy);
 	}
@@ -236,7 +237,11 @@ int resize_clock (void *obj)
 		strftime(buf_date, sizeof(buf_date), time2_format, clock_gettime_for_tz(time2_timezone));
 
 	// vertical panel doen't adjust width
-	if (!panel_horizontal) return ret;
+	if (!panel_horizontal) {
+//		clock->area.posy = panel->area.bg->border.width + panel->area.paddingxlr;
+//		clock->area.height = (2 * clock->area.paddingxlr) + (time_height + date_height);
+		return ret;
+	}
 
 	//printf("  resize_clock\n");
 	cairo_surface_t *cs;
diff --git a/src/launcher/launcher.c b/src/launcher/launcher.c
index 50d3829..75388f1 100644
--- a/src/launcher/launcher.c
+++ b/src/launcher/launcher.c
@@ -70,8 +70,12 @@ void init_launcher_panel(void *p)
 	launcher->area._resize = resize_launcher;
 	launcher->area.resize = 1;
 	launcher->area.redraw = 1;
-	launcher->area.on_screen = 1;
 
+	// check consistency
+	if (launcher->list_apps == NULL)
+		return;
+
+	launcher->area.on_screen = 1;
 	if (panel_horizontal) {
 		// panel horizonal => fixed height and posy
 		launcher->area.posy = panel->area.bg->border.width + panel->area.paddingy;
@@ -149,6 +153,7 @@ void cleanup_launcher()
 	launcher_enabled = 0;
 }
 
+
 int resize_launcher(void *obj)
 {
 	Launcher *launcher = obj;
@@ -222,9 +227,6 @@ int resize_launcher(void *obj)
 			icons_per_row = count / icons_per_column + (count%icons_per_column != 0);
 			launcher->area.width = (2 * launcher->area.bg->border.width) + (2 * launcher->area.paddingxlr) + (icon_size * icons_per_row) + ((icons_per_row-1) * launcher->area.paddingx);
 		}
-
-//		launcher->area.posx = panel->area.bg->border.width + panel->area.paddingxlr;
-		launcher->area.posy = panel->area.bg->border.width;
 	}
 	else {
 		if (!count) launcher->area.height = 0;
@@ -236,9 +238,6 @@ int resize_launcher(void *obj)
 			icons_per_column = count / icons_per_row+ (count%icons_per_row != 0);
 			launcher->area.height = (2 * launcher->area.bg->border.width) + (2 * launcher->area.paddingxlr) + (icon_size * icons_per_column) + ((icons_per_column-1) * launcher->area.paddingx);
 		}
-
-		launcher->area.posx = panel->area.bg->border.width;
-//		launcher->area.posy = panel->area.height - panel->area.bg->border.width - panel->area.paddingxlr - launcher->area.height;
 	}
 
 	int i, posx, posy;
diff --git a/src/util/area.c b/src/util/area.c
index ce122a2..460abd9 100644
--- a/src/util/area.c
+++ b/src/util/area.c
@@ -68,13 +68,6 @@
  * 'panel_items = SC' define a panel with just Systray and Clock.
  * So the tree 'Panel.Area' will have 2 childs (Systray and Clock).
  *
- * 1) ok
- * 2) ??
- * 3) ??
- * répartition entre niveau global et niveau local ??
- *   size_by_content peut-il modifier redraw=1 en cas de changement ? ou est ce géré par chaque composant ?
- *   size_by_layout peut-il modifier redraw ?
- *
  ************************************************************/
 
 void rendering(void *obj)