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Refine the listbox dnd example

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Add a drag handle, and demonstrate broken offsets.
This commit is contained in:
Matthias Clasen
2017-04-22 08:03:00 -04:00
parent fba4e8fb47
commit 7ab48458a0
1 changed files with 20 additions and 11 deletions
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31
tests/testlist3.c
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@ -9,17 +9,23 @@ drag_begin (GtkWidget *widget,
GdkDragContext *context,
gpointer data)
{
GtkWidget *row;
GtkAllocation alloc;
cairo_surface_t *surface;
cairo_t *cr;
int x, y;
gtk_widget_get_allocation (widget, &alloc);
row = gtk_widget_get_ancestor (widget, GTK_TYPE_LIST_BOX_ROW);
gtk_widget_get_allocation (row, &alloc);
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, alloc.width, alloc.height);
cr = cairo_create (surface);
gtk_style_context_add_class (gtk_widget_get_style_context (widget), "during-dnd");
gtk_widget_draw (widget, cr);
gtk_style_context_remove_class (gtk_widget_get_style_context (widget), "during-dnd");
gtk_style_context_add_class (gtk_widget_get_style_context (row), "during-dnd");
gtk_widget_draw (row, cr);
gtk_style_context_remove_class (gtk_widget_get_style_context (row), "during-dnd");
gtk_widget_translate_coordinates (widget, row, 0, 0, &x, &y);
cairo_surface_set_device_offset (surface, -x, -y);
gtk_drag_set_icon_surface (context, surface);
cairo_destroy (cr);
@ -58,7 +64,7 @@ drag_data_received (GtkWidget *widget,
GtkWidget *source;
int pos;
target = gtk_widget_get_ancestor (widget, GTK_TYPE_LIST_BOX_ROW);
target = widget;
pos = gtk_list_box_row_get_index (GTK_LIST_BOX_ROW (target));
row = (gpointer)* (gpointer*)gtk_selection_data_get_data (selection_data);
@ -73,22 +79,25 @@ drag_data_received (GtkWidget *widget,
static GtkWidget *
create_row (const gchar *text)
{
GtkWidget *row, *ebox, *box, *label;
GtkWidget *row, *ebox, *box, *label, *image;
row = gtk_list_box_row_new ();
ebox = gtk_event_box_new ();
image = gtk_image_new_from_icon_name ("open-menu-symbolic", 1);
gtk_container_add (GTK_CONTAINER (ebox), image);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10);
g_object_set (box, "margin-start", 10, "margin-end", 10, NULL);
label = gtk_label_new (text);
gtk_container_add (GTK_CONTAINER (row), ebox);
gtk_container_add (GTK_CONTAINER (ebox), box);
gtk_container_add (GTK_CONTAINER (box), label);
gtk_container_add (GTK_CONTAINER (row), box);
gtk_box_pack_start (GTK_BOX (box), label, TRUE, FALSE, 0);
gtk_container_add (GTK_CONTAINER (box), ebox);
gtk_drag_source_set (ebox, GDK_BUTTON1_MASK, entries, 1, GDK_ACTION_MOVE);
g_signal_connect (ebox, "drag-begin", G_CALLBACK (drag_begin), NULL);
g_signal_connect (ebox, "drag-data-get", G_CALLBACK (drag_data_get), NULL);
gtk_drag_dest_set (ebox, GTK_DEST_DEFAULT_ALL, entries, 1, GDK_ACTION_MOVE);
g_signal_connect (ebox, "drag-data-received", G_CALLBACK (drag_data_received), NULL);
gtk_drag_dest_set (row, GTK_DEST_DEFAULT_ALL, entries, 1, GDK_ACTION_MOVE);
g_signal_connect (row, "drag-data-received", G_CALLBACK (drag_data_received), NULL);
return row;
}