--suppress_actions;
}
+/** @brief State for ql_drag_begin() and its callbacks */
+struct ql_drag_begin_state {
+ struct queuelike *ql;
+ int rows;
+ int index;
+ GdkPixmap **pixmaps;
+};
+
+/** @brief Callback to construct a row pixmap */
+static void ql_drag_make_row_pixmaps(GtkTreeModel attribute((unused)) *model,
+ GtkTreePath *path,
+ GtkTreeIter attribute((unused)) *iter,
+ gpointer data) {
+ struct ql_drag_begin_state *qdbs = data;
+
+ qdbs->pixmaps[qdbs->index++]
+ = gtk_tree_view_create_row_drag_icon(GTK_TREE_VIEW(qdbs->ql->view),
+ path);
+}
+
/** @brief Called when a drag operation from this queuelike begins
* @param w Source widget (the tree view)
* @param dc Drag context
static void ql_drag_begin(GtkWidget attribute((unused)) *w,
GdkDragContext attribute((unused)) *dc,
gpointer user_data) {
- struct queuelike *const attribute((unused)) ql = user_data;
-
- fprintf(stderr, "drag-begin\n");
- // TODO call gtk_drag_source_set_icon() to set a suitably informative
- // drag icon
+ struct queuelike *const ql = user_data;
+ struct ql_drag_begin_state qdbs[1];
+ GdkPixmap *icon;
+
+ //fprintf(stderr, "drag-begin\n");
+ memset(qdbs, 0, sizeof *qdbs);
+ qdbs->ql = ql;
+ /* Find out how many rows there are */
+ if(!(qdbs->rows = gtk_tree_selection_count_selected_rows(ql->selection)))
+ return; /* doesn't make sense */
+ /* Generate a pixmap for each row */
+ qdbs->pixmaps = xcalloc(qdbs->rows, sizeof *qdbs->pixmaps);
+ gtk_tree_selection_selected_foreach(ql->selection,
+ ql_drag_make_row_pixmaps,
+ qdbs);
+ /* Determine the size of the final icon */
+ int height = 0, width = 0;
+ for(int n = 0; n < qdbs->rows; ++n) {
+ int pxw, pxh;
+ gdk_drawable_get_size(qdbs->pixmaps[n], &pxw, &pxh);
+ if(pxw > width)
+ width = pxw;
+ height += pxh;
+ }
+ if(!width || !height)
+ return; /* doesn't make sense */
+ /* Construct the icon */
+ icon = gdk_pixmap_new(qdbs->pixmaps[0], width, height, -1);
+ GdkGC *gc = gdk_gc_new(icon);
+ gdk_gc_set_colormap(gc, gtk_widget_get_colormap(ql->view));
+ int y = 0;
+ for(int n = 0; n < qdbs->rows; ++n) {
+ int pxw, pxh;
+ gdk_drawable_get_size(qdbs->pixmaps[n], &pxw, &pxh);
+ gdk_draw_drawable(icon,
+ gc,
+ qdbs->pixmaps[n],
+ 0, 0, /* source coords */
+ 0, y, /* dest coords */
+ pxw, pxh); /* size */
+ y += pxh;
+ }
+ // TODO scale down a bit, the resulting icons are currently a bit on the
+ // large side.
+ gtk_drag_source_set_icon(ql->view,
+ gtk_widget_get_colormap(ql->view),
+ icon,
+ NULL);
}
/** @brief Callback to add selected tracks to the selection data