delete children widget

common/utils/T/tracer/gui/container.c

@@ -18,6 +18,7 @@ static void add_child(gui *g, widget *_this, widget *child, int position)
 {
   LOGD("ADD_CHILD container\n");
   struct container_widget *this = _this;
+
   this->hints_are_valid = 0;
   widget_add_child_internal(g, this, child, position);
 
@@ -35,6 +36,24 @@ static void add_child(gui *g, widget *_this, widget *child, int position)
   this->nchildren++;
 }
 
+static void del_child(gui *g, widget *_this, widget *child)
+{
+  LOGD("DEL_CHILD container\n");
+  struct container_widget *this = _this;
+  int position = widget_get_child_position(g, _this, child);
+
+  this->hints_are_valid = 0;
+  widget_del_child_internal(g, this, child);
+
+  memmove(this->growable + position, this->growable + position+1,
+          (this->nchildren - position - 1) * sizeof(int));
+
+  this->growable = realloc(this->growable, (this->nchildren-1)*sizeof(int));
+  if (this->growable == NULL) abort();
+
+  this->nchildren--;
+}
+
 static void compute_vertical_hints(struct gui *g,
     struct container_widget *this)
 {
@@ -271,6 +290,7 @@ widget *new_container(gui *_gui, int vertical)
 
   w->common.paint     = paint;
   w->common.add_child = add_child;
+  w->common.del_child = del_child;
   w->common.repack    = repack;
 
   if (vertical) {

common/utils/T/tracer/gui/gui.h

@@ -16,6 +16,7 @@ gui *gui_init(void);
 
 /* position = -1 to put at the end */
 void widget_add_child(gui *gui, widget *parent, widget *child, int position);
+void widget_del_child(gui *gui, widget *parent, widget *child);
 void widget_dirty(gui *gui, widget *this);
 
 widget *new_toplevel_window(gui *gui, int width, int height, char *title);

common/utils/T/tracer/gui/gui_defs.h

@@ -46,6 +46,7 @@ struct widget {
   struct widget *parent;
   void (*repack)(gui *g, widget *this);
   void (*add_child)(gui *g, widget *this, widget *child, int position);
+  void (*del_child)(gui *g, widget *this, widget *child);
   void (*allocate)(gui *g, widget *this, int x, int y, int width, int height);
   void (*hints)(gui *g, widget *this, int *width, int *height);
   void (*paint)(gui *g, widget *this);
@@ -197,6 +198,8 @@ struct gui {
 widget *new_widget(struct gui *g, enum widget_type type, int size);
 void widget_add_child_internal(
     gui *_gui, widget *parent, widget *child, int position);
+void widget_del_child_internal(gui *_gui, widget *parent, widget *child);
+int widget_get_child_position(gui *_gui, widget *parent, widget *child);
 
 const char *widget_name(enum widget_type type);
 

common/utils/T/tracer/gui/widget.c

@@ -12,6 +12,7 @@ static void default_allocate(
     gui *gui, widget *_this, int x, int y, int width, int height);
 static void default_add_child(
     gui *_gui, widget *_this, widget *child, int position);
+static void default_del_child(gui *_gui, widget *_this, widget *child);
 static void default_hints(gui *g, widget *this, int *width, int *height);
 static void default_button(gui *gui, widget *_this, int x, int y, int button,
     int up);
@@ -47,6 +48,7 @@ widget *new_widget(struct gui *g, enum widget_type type, int size)
   ret->clear     = default_clear;
   ret->repack    = default_repack;
   ret->add_child = default_add_child;
+  ret->del_child = default_del_child;
   ret->allocate  = default_allocate;
   ret->hints     = default_hints;
   ret->button    = default_button;
@@ -121,6 +123,65 @@ repack:
   send_event(_gui, REPACK, p->id);
 }
 
+void widget_del_child_internal(gui *_gui, widget *parent, widget *child)
+{
+  struct widget *p = parent;
+  struct widget *c = child;
+  struct widget_list *prev, *cur;
+  int i;
+
+  c->parent = NULL;
+
+  prev = NULL;
+  cur = p->children;
+
+  while (cur != NULL && cur->item != c) {
+    prev = cur;
+    cur = cur->next;
+  }
+
+  if (cur == NULL) ERR("child not found\n");
+
+  if (prev == NULL) {
+    /* child is at head */
+    p->children = cur->next;
+    if (p->children != NULL) p->children->last = cur->last;
+    goto done;
+  }
+
+  if (cur->next == NULL) {
+    /* child is last (and prev is != NULL) */
+    prev->next = NULL;
+    p->children->last = prev;
+    goto done;
+  }
+
+  /* child is between two existing items */
+  prev->next = cur->next;
+
+done:
+  free(cur);
+  send_event(_gui, REPACK, p->id);
+}
+
+int widget_get_child_position(gui *_gui, widget *parent, widget *child)
+{
+  struct widget *p = parent;
+  struct widget *c = child;
+  struct widget_list *cur;
+  int i = 0;
+
+  cur = p->children;
+
+  while (cur != NULL && cur->item != c) {
+    cur = cur->next;
+    i++;
+  }
+
+  if (cur == NULL) return -1;
+  return i;
+}
+
 /*************************************************************************/
 /*                           default functions                           */
 /*************************************************************************/
@@ -146,6 +207,12 @@ static void default_add_child(
   WARN("cannot add child to widget %s\n", widget_name(this->type));
 }
 
+static void default_del_child( gui *_gui, widget *_this, widget *child)
+{
+  struct widget *this = _this;
+  WARN("cannot del child from widget %s\n", widget_name(this->type));
+}
+
 static void default_allocate(
     gui *gui, widget *_this, int x, int y, int width, int height)
 {
@@ -180,6 +247,14 @@ void widget_add_child(gui *_gui, widget *parent, widget *child, int position)
   gunlock(_gui);
 }
 
+void widget_del_child(gui *_gui, widget *parent, widget *child)
+{
+  struct widget *this = parent;
+  glock(_gui);
+  this->del_child(_gui, parent, child);
+  gunlock(_gui);
+}
+
 void widget_dirty(gui *_gui, widget *_this)
 {
   struct gui *g = _gui;