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New function to set a callback to test if a node in drag can be dropped

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Sat Aug 15 03:19:30 1998  John Ellis  <johne@bellatlantic.net>

        * gtk/gtkctree.[ch] (gtk_ctree_set_drag_compare_func): New function
        to set a callback to test if a node in drag can be dropped onto
        it's currrent location.
        * gtk/gtkctree.c (set_mouse_cursor),(check_cursor): New functions
        to change the pointer when a drag destination is not allowed.
This commit is contained in:
John Ellis 1998-08-15 07:30:01 +00:00 committed by johne
parent 736bdbeaeb
commit db85d915e7
2 changed files with 115 additions and 17 deletions
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123
gtk/gtkctree.c
View File

@ -191,8 +191,9 @@ static void real_undo_selection (GtkCList *clist);
static void select_row_recursive (GtkCTree *ctree, static void select_row_recursive (GtkCTree *ctree,
GtkCTreeNode *node, GtkCTreeNode *node,
gpointer data); gpointer data);
static void set_mouse_cursor (GtkCTree *ctree,
gboolean enable);
static void check_cursor (GtkCTree *ctree);
enum enum
@ -409,6 +410,7 @@ gtk_ctree_init (GtkCTree *ctree)
ctree->in_drag = FALSE; ctree->in_drag = FALSE;
ctree->drag_rect = FALSE; ctree->drag_rect = FALSE;
ctree->line_style = GTK_CTREE_LINES_SOLID; ctree->line_style = GTK_CTREE_LINES_SOLID;
ctree->drag_compare = NULL;
} }
static void static void
@ -741,6 +743,7 @@ gtk_ctree_button_motion (GtkWidget *widget,
GTK_CTREE_NODE (g_list_nth (clist->row_list, row)); GTK_CTREE_NODE (g_list_nth (clist->row_list, row));
ctree->drag_row = row; ctree->drag_row = row;
draw_xor_line (ctree); draw_xor_line (ctree);
check_cursor(ctree);
} }
else if (ctree->drag_target && else if (ctree->drag_target &&
!GTK_CTREE_ROW (ctree->drag_target)->is_leaf) !GTK_CTREE_ROW (ctree->drag_target)->is_leaf)
@ -758,6 +761,7 @@ gtk_ctree_button_motion (GtkWidget *widget,
GTK_CTREE_NODE (g_list_nth (clist->row_list, row)); GTK_CTREE_NODE (g_list_nth (clist->row_list, row));
ctree->drag_row = row; ctree->drag_row = row;
draw_xor_rect (ctree); draw_xor_rect (ctree);
check_cursor(ctree);
} }
} }
} }
@ -785,6 +789,8 @@ gtk_ctree_button_release (GtkWidget *widget,
ctree->in_drag = FALSE; ctree->in_drag = FALSE;
set_mouse_cursor(ctree, TRUE);
if (ctree->use_icons && ctree->drag_icon) if (ctree->use_icons && ctree->drag_icon)
{ {
gdk_window_destroy (ctree->drag_icon); gdk_window_destroy (ctree->drag_icon);
@ -820,31 +826,46 @@ gtk_ctree_button_release (GtkWidget *widget,
{ {
if (GTK_CTREE_ROW (ctree->drag_target)->sibling != if (GTK_CTREE_ROW (ctree->drag_target)->sibling !=
ctree->drag_source) ctree->drag_source)
gtk_signal_emit (GTK_OBJECT (ctree), if (!ctree->drag_compare ||
ctree_signals[TREE_MOVE], ctree->drag_compare (ctree,
ctree->drag_source, ctree->drag_source,
GTK_CTREE_ROW (ctree->drag_target)->parent, GTK_CTREE_ROW (ctree->drag_target)->parent,
GTK_CTREE_ROW (ctree->drag_target)->sibling); GTK_CTREE_ROW (ctree->drag_target)->sibling))
gtk_signal_emit (GTK_OBJECT (ctree),
ctree_signals[TREE_MOVE],
ctree->drag_source,
GTK_CTREE_ROW (ctree->drag_target)->parent,
GTK_CTREE_ROW (ctree->drag_target)->sibling);
} }
else if (ctree->insert_pos == GTK_CTREE_POS_BEFORE) else if (ctree->insert_pos == GTK_CTREE_POS_BEFORE)
{ {
if (GTK_CTREE_ROW (ctree->drag_source)->sibling != if (GTK_CTREE_ROW (ctree->drag_source)->sibling !=
ctree->drag_target) ctree->drag_target)
gtk_signal_emit (GTK_OBJECT (ctree), if (!ctree->drag_compare ||
ctree_signals[TREE_MOVE], ctree->drag_compare (ctree,
ctree->drag_source, ctree->drag_source,
GTK_CTREE_ROW (ctree->drag_target)->parent, GTK_CTREE_ROW (ctree->drag_target)->parent,
ctree->drag_target); ctree->drag_target))
gtk_signal_emit (GTK_OBJECT (ctree),
ctree_signals[TREE_MOVE],
ctree->drag_source,
GTK_CTREE_ROW (ctree->drag_target)->parent,
ctree->drag_target);
} }
else if (!GTK_CTREE_ROW (ctree->drag_target)->is_leaf) else if (!GTK_CTREE_ROW (ctree->drag_target)->is_leaf)
{ {
if (GTK_CTREE_ROW (ctree->drag_target)->children != if (GTK_CTREE_ROW (ctree->drag_target)->children !=
ctree->drag_source) ctree->drag_source)
gtk_signal_emit (GTK_OBJECT (ctree), if (!ctree->drag_compare ||
ctree_signals[TREE_MOVE], ctree->drag_compare (ctree,
ctree->drag_source, ctree->drag_source,
ctree->drag_target, ctree->drag_target,
GTK_CTREE_ROW (ctree->drag_target)->children); GTK_CTREE_ROW (ctree->drag_target)->children))
gtk_signal_emit (GTK_OBJECT (ctree),
ctree_signals[TREE_MOVE],
ctree->drag_source,
ctree->drag_target,
GTK_CTREE_ROW (ctree->drag_target)->children);
} }
} }
ctree->drag_source = NULL; ctree->drag_source = NULL;
@ -5305,3 +5326,71 @@ real_undo_selection (GtkCList *clist)
gtk_clist_moveto (clist, clist->focus_row, -1, 0, 0); gtk_clist_moveto (clist, clist->focus_row, -1, 0, 0);
} }
void
gtk_ctree_set_drag_compare_func (GtkCTree *ctree, GtkCTreeCompareDragFunc cmp_func)
{
g_return_if_fail (ctree != NULL);
g_return_if_fail (GTK_IS_CTREE (ctree));
ctree->drag_compare = cmp_func;
}
static void
set_mouse_cursor(GtkCTree *ctree, gboolean enable)
{
GdkCursor *cursor;
g_return_if_fail (ctree != NULL);
g_return_if_fail (GTK_IS_CTREE (ctree));
if (enable)
cursor = gdk_cursor_new (GDK_LEFT_PTR);
else
cursor = gdk_cursor_new (GDK_CIRCLE);
gdk_window_set_cursor (GTK_CLIST(ctree)->clist_window, cursor);
gdk_cursor_destroy (cursor);
}
static void
check_cursor(GtkCTree *ctree)
{
g_return_if_fail (ctree != NULL);
g_return_if_fail (GTK_IS_CTREE (ctree));
if (!GTK_CTREE_ROW (ctree->drag_source)->children ||
!gtk_ctree_is_ancestor (ctree, ctree->drag_source, ctree->drag_target))
{
if (ctree->insert_pos == GTK_CTREE_POS_AFTER)
{
if (GTK_CTREE_ROW (ctree->drag_target)->sibling != ctree->drag_source)
set_mouse_cursor( ctree, (!ctree->drag_compare ||
ctree->drag_compare (ctree,
ctree->drag_source,
GTK_CTREE_ROW (ctree->drag_target)->parent,
GTK_CTREE_ROW (ctree->drag_target)->sibling)));
}
else if (ctree->insert_pos == GTK_CTREE_POS_BEFORE)
{
if (GTK_CTREE_ROW (ctree->drag_source)->sibling != ctree->drag_target)
set_mouse_cursor( ctree, (!ctree->drag_compare ||
ctree->drag_compare (ctree,
ctree->drag_source,
GTK_CTREE_ROW (ctree->drag_target)->parent,
ctree->drag_target)));
}
else if (!GTK_CTREE_ROW (ctree->drag_target)->is_leaf)
{
if (GTK_CTREE_ROW (ctree->drag_target)->children != ctree->drag_source)
set_mouse_cursor( ctree, (!ctree->drag_compare ||
ctree->drag_compare (ctree,
ctree->drag_source,
ctree->drag_target,
GTK_CTREE_ROW (ctree->drag_target)->children)));
}
}
else
set_mouse_cursor(ctree, FALSE);
}

9
gtk/gtkctree.h
View File

@ -87,6 +87,11 @@ typedef gboolean (*GtkCTreeGNodeFunc) (GtkCTree *ctree,
GtkCTreeNode *cnode, GtkCTreeNode *cnode,
gpointer data); gpointer data);
typedef gboolean (*GtkCTreeCompareDragFunc) (GtkCTree *ctree,
GtkCTreeNode *source_node,
GtkCTreeNode *new_parent,
GtkCTreeNode *new_sibling);
struct _GtkCTree struct _GtkCTree
{ {
GtkCList clist; GtkCList clist;
@ -109,6 +114,8 @@ struct _GtkCTree
guint in_drag : 1; guint in_drag : 1;
guint drag_rect : 1; guint drag_rect : 1;
guint line_style : 2; guint line_style : 2;
GtkCTreeCompareDragFunc drag_compare;
}; };
struct _GtkCTreeClass struct _GtkCTreeClass
@ -372,6 +379,8 @@ void gtk_ctree_set_use_drag_icons (GtkCTree *ctree,
gboolean use_icons); gboolean use_icons);
void gtk_ctree_set_line_style (GtkCTree *ctree, void gtk_ctree_set_line_style (GtkCTree *ctree,
GtkCTreeLineStyle line_style); GtkCTreeLineStyle line_style);
void gtk_ctree_set_drag_compare_func (GtkCTree *ctree,
GtkCTreeCompareDragFunc cmp_func);
/*********************************************************** /***********************************************************
* Tree sorting functions * * Tree sorting functions *