1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
#include <gtk/gtk.h>
typedef GtkListStore MyModel;
typedef GtkListStoreClass MyModelClass;
static void my_model_drag_source_init (GtkTreeDragSourceIface *iface);
static GType my_model_get_type (void);
G_DEFINE_TYPE_WITH_CODE (MyModel, my_model, GTK_TYPE_LIST_STORE,
G_IMPLEMENT_INTERFACE (GTK_TYPE_TREE_DRAG_SOURCE,
my_model_drag_source_init))
static void
my_model_class_init (MyModelClass *class)
{
}
static void
my_model_init (MyModel *object)
{
GType types[1] = { G_TYPE_STRING };
gtk_list_store_set_column_types (GTK_LIST_STORE (object), G_N_ELEMENTS (types), types);
}
static GdkContentProvider *
my_model_drag_data_get (GtkTreeDragSource *source,
GtkTreePath *path)
{
GdkContentProvider *content;
GtkTreeIter iter;
gchar *text;
gtk_tree_model_get_iter (GTK_TREE_MODEL (source), &iter, path);
gtk_tree_model_get (GTK_TREE_MODEL (source), &iter, 0, &text, -1);
content = gdk_content_provider_new_typed (G_TYPE_STRING, text);
g_free (text);
return content;
}
static void
my_model_drag_source_init (GtkTreeDragSourceIface *iface)
{
static GtkTreeDragSourceIface *parent;
parent = g_type_interface_peek_parent (iface);
iface->row_draggable = parent->row_draggable;
iface->drag_data_delete = parent->drag_data_delete;
iface->drag_data_get = my_model_drag_data_get;
}
static GtkTreeModel *
get_model (void)
{
MyModel *model;
model = g_object_new (my_model_get_type (), NULL);
gtk_list_store_insert_with_values (GTK_LIST_STORE (model), NULL, -1, 0, "Item 1", -1);
gtk_list_store_insert_with_values (GTK_LIST_STORE (model), NULL, -1, 0, "Item 2", -1);
gtk_list_store_insert_with_values (GTK_LIST_STORE (model), NULL, -1, 0, "Item 3", -1);
return GTK_TREE_MODEL (model);
}
static GtkWidget *
get_dragsource (void)
{
GtkTreeView *tv;
GtkCellRenderer *renderer;
GtkTreeViewColumn *column;
GdkContentFormats *targets;
tv = (GtkTreeView*) gtk_tree_view_new ();
renderer = gtk_cell_renderer_text_new ();
column = gtk_tree_view_column_new_with_attributes ("Text", renderer, "text", 0, NULL);
gtk_tree_view_append_column (tv, column);
gtk_tree_view_set_model (tv, get_model ());
targets = gdk_content_formats_new_for_gtype (G_TYPE_STRING);
gtk_tree_view_enable_model_drag_source (tv, GDK_BUTTON1_MASK, targets, GDK_ACTION_COPY);
gdk_content_formats_unref (targets);
return GTK_WIDGET (tv);
}
static void
drag_drop (GtkDropTarget *dest,
const GValue *value,
int x,
int y,
gpointer dada)
{
GtkWidget *widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (dest));
gtk_label_set_label (GTK_LABEL (widget), g_value_get_string (value));
}
static GtkWidget *
get_droptarget (void)
{
GtkWidget *label;
GtkDropTarget *dest;
label = gtk_label_new ("Drop here");
dest = gtk_drop_target_new (G_TYPE_STRING, GDK_ACTION_COPY);
g_signal_connect (dest, "drop", G_CALLBACK (drag_drop), NULL);
gtk_widget_add_controller (label, GTK_EVENT_CONTROLLER (dest));
return label;
}
int
main (int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *box;
gtk_init ();
window = gtk_window_new ();
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_window_set_child (GTK_WINDOW (window), box);
gtk_box_append (GTK_BOX (box), get_dragsource ());
gtk_box_append (GTK_BOX (box), get_droptarget ());
gtk_widget_show (window);
while (TRUE)
g_main_context_iteration (NULL, TRUE);
return 0;
}
|
