#include "disobedience.h"
#include "popup.h"
#include "queue-generic.h"
+#include "multidrag.h"
+#include "autoscroll.h"
static const GtkTargetEntry queuelike_targets[] = {
{
--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);
-}
+/* Drag and drop ------------------------------------------------------------ */
-/** @brief Called when a drag operation from this queuelike begins
- * @param w Source widget (the tree view)
- * @param dc Drag context
- * @param user_data The queuelike
+/** @brief Identify the drop path
+ * @param w Destination tree view widget
+ * @param model Underlying tree model
+ * @param wx X coordinate
+ * @param wy Y coordinate
+ * @param posp Where to store relative position
+ * @return Target path or NULL
+ *
+ * This is used by ql_drag_motion() and ql_drag_data_received() to identify a
+ * drop would or does land. It's important that they use the same code since
+ * otherwise the visual feedback can be inconsistent with the actual effect!
+ *
+ * Remember to free the returned path.
*/
-static void ql_drag_begin(GtkWidget attribute((unused)) *w,
- GdkDragContext attribute((unused)) *dc,
- gpointer user_data) {
- 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;
+static GtkTreePath *ql_drop_path(GtkWidget *w,
+ GtkTreeModel *model,
+ int wx, int wy,
+ GtkTreeViewDropPosition *posp) {
+ GtkTreePath *path = NULL;
+ GtkTreeViewDropPosition pos;
+ GtkTreeIter iter[1], last[1];
+ int tx, ty;
+
+ gtk_tree_view_convert_widget_to_tree_coords(GTK_TREE_VIEW(w),
+ wx, wy, &tx, &ty);
+ if(gtk_tree_view_get_dest_row_at_pos(GTK_TREE_VIEW(w),
+ wx, wy,
+ &path,
+ &pos)) {
+ //fprintf(stderr, "gtk_tree_view_get_dest_row_at_pos() -> TRUE\n");
+ // Normalize drop position
+ switch(pos) {
+ case GTK_TREE_VIEW_DROP_INTO_OR_BEFORE:
+ pos = GTK_TREE_VIEW_DROP_BEFORE;
+ break;
+ case GTK_TREE_VIEW_DROP_INTO_OR_AFTER:
+ pos = GTK_TREE_VIEW_DROP_AFTER;
+ break;
+ default: break;
+ }
+ } else if(gtk_tree_model_get_iter_first(model, iter)) {
+ /* If the pointer isn't over any particular row then either it's below
+ * the last row, in which case we want the dropzone to be below that row;
+ * or it's above the first row (in the column headings) in which case we
+ * want the dropzone to be above that row. */
+ if(ty >= 0) {
+ /* Find the last row */
+ do {
+ *last = *iter;
+ } while(gtk_tree_model_iter_next(model, iter));
+ /* The drop target is just after it */
+ pos = GTK_TREE_VIEW_DROP_AFTER;
+ *iter = *last;
+ } else {
+ /* The drop target will be just before the first row */
+ pos = GTK_TREE_VIEW_DROP_BEFORE;
+ }
+ path = gtk_tree_model_get_path(model, iter);
}
- // 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);
+ *posp = pos;
+ return path;
}
/** @brief Called when a drag moves within a candidate destination
* @param time_ Current time
* @param user_data Pointer to queuelike
* @return TRUE in a dropzone, otherwise FALSE
+ *
+ * This is the handler for the "drag-motion" signal.
*/
static gboolean ql_drag_motion(GtkWidget *w,
GdkDragContext *dc,
gint x,
gint y,
guint time_,
- gpointer attribute((unused)) user_data) {
- //struct queuelike *const ql = user_data;
+ gpointer user_data) {
+ struct queuelike *const ql = user_data;
GdkDragAction action = 0;
-
+
// GTK_DEST_DEFAULT_MOTION vets actions as follows:
// 1) if dc->suggested_action is in the gtk_drag_dest_set actions
// then dc->suggested_action is taken as the action.
action = 0;
}
// Report the status
+ //fprintf(stderr, "drag action: %u\n", action);
gdk_drag_status(dc, action, time_);
if(action) {
- // Highlight the drop area
- GtkTreePath *path;
GtkTreeViewDropPosition pos;
- if(gtk_tree_view_get_dest_row_at_pos(GTK_TREE_VIEW(w),
- x, y,
- &path,
- &pos)) {
- //fprintf(stderr, "gtk_tree_view_get_dest_row_at_pos() -> TRUE\n");
- // Normalize drop position
- switch(pos) {
- case GTK_TREE_VIEW_DROP_INTO_OR_BEFORE:
- pos = GTK_TREE_VIEW_DROP_BEFORE;
- break;
- case GTK_TREE_VIEW_DROP_INTO_OR_AFTER:
- pos = GTK_TREE_VIEW_DROP_AFTER;
- break;
- default: break;
- }
- // Highlight drop target
- gtk_tree_view_set_drag_dest_row(GTK_TREE_VIEW(w), path, pos);
- } else {
- //fprintf(stderr, "gtk_tree_view_get_dest_row_at_pos() -> FALSE\n");
- gtk_tree_view_set_drag_dest_row(GTK_TREE_VIEW(w), NULL, 0);
- }
+ // Find the drop target
+ GtkTreePath *path = ql_drop_path(w, GTK_TREE_MODEL(ql->store), x, y, &pos);
+ // Highlight drop target
+ gtk_tree_view_set_drag_dest_row(GTK_TREE_VIEW(w), path, pos);
+ if(path)
+ gtk_tree_path_free(path);
}
- return TRUE;
+ autoscroll_add(GTK_TREE_VIEW(w));
+ return TRUE; /* We are (always) in a drop zone */
}
/** @brief Called when a drag moves leaves a candidate destination
* @param dc Drag context
* @param time_ Current time
* @param user_data Pointer to queuelike
+ *
+ * This is the handler for the "drag-leave" signal.
+ *
+ * It turns out that we get a drag-leave event when the data is dropped, too
+ * (See _gtk_drag_dest_handle_event). This seems logically consistent and is
+ * convenient too - for instance it's why autoscroll_remove() gets called at
+ * the end of a drag+drop sequence.
*/
static void ql_drag_leave(GtkWidget *w,
GdkDragContext attribute((unused)) *dc,
//struct queuelike *const ql = user_data;
gtk_tree_view_set_drag_dest_row(GTK_TREE_VIEW(w), NULL, 0);
+ autoscroll_remove(GTK_TREE_VIEW(w));
}
/** @brief Callback to add selected tracks to the selection data
* @param info_ Target @c info parameter
* @param time_ Time data requested (for some reason not a @c time_t)
* @param user_data The queuelike
+ *
+ * The list of tracks is converted into a single string, consisting of IDs
+ * and track names. Each is terminated by a newline. Including both ID and
+ * track name means that the receiver can use whichever happens to be more
+ * convenient.
+ *
+ * If there are no IDs for rows in this widget then the ID half is undefined.
+ *
+ * This is the handler for the "drag-data-get" signal.
*/
static void ql_drag_data_get(GtkWidget attribute((unused)) *w,
GdkDragContext attribute((unused)) *dc,
struct queuelike *const ql = user_data;
struct dynstr result[1];
- /* The list of tracks is converted into a single string, consisting of IDs
- * and track names. Each is terminated by a newline. Including both ID and
- * track name means that the receiver can use whichever happens to be more
- * convenient. */
dynstr_init(result);
gtk_tree_selection_selected_foreach(ql->selection,
ql_drag_data_get_collect,
* @param info_ The target type that was chosen
* @param time_ Time data received (for some reason not a @c time_t)
* @param user_data The queuelike
+ *
+ * This is the handler for the "drag-data-received" signal.
*/
static void ql_drag_data_received(GtkWidget attribute((unused)) *w,
GdkDragContext attribute((unused)) *dc,
vector_terminate(ids);
vector_terminate(tracks);
/* Figure out which row the drop precedes (if any) */
- GtkTreePath *path;
GtkTreeViewDropPosition pos;
struct queue_entry *q;
- if(!gtk_tree_view_get_dest_row_at_pos(GTK_TREE_VIEW(ql->view), x, y,
- &path, &pos)) {
- //fprintf(stderr, "gtk_tree_view_get_dest_row_at_pos returned FALSE\n");
+ GtkTreePath *path = ql_drop_path(w, GTK_TREE_MODEL(ql->store), x, y, &pos);
+ if(path) {
+ q = ql_path_to_q(GTK_TREE_MODEL(ql->store), path);
+ } else {
/* This generally means a drop past the end of the queue. We find the last
* element in the queue and ask to move after that. */
for(q = ql->q; q && q->next; q = q->next)
;
- } else {
- /* Convert the path to a queue entry pointer. */
- q = ql_path_to_q(GTK_TREE_MODEL(ql->store), path);
- //fprintf(stderr, " tree view likes to drop near %s\n",
- // q->id ? q->id : "NULL");
- /* TODO interpretation of q=NULL */
- /* Q should point to the entry just before the insertion point, so that
- * moveafter works, or NULL to insert right at the start. We don't support
- * dropping into a row, since that doesn't make sense for us. */
- switch(pos) {
- case GTK_TREE_VIEW_DROP_BEFORE:
- case GTK_TREE_VIEW_DROP_INTO_OR_BEFORE:
- if(q) {
- q = q->prev;
- //fprintf(stderr, " ...but we like to drop near %s\n",
- // q ? q->id : "NULL");
- }
- break;
- default:
- break;
+ }
+ switch(pos) {
+ case GTK_TREE_VIEW_DROP_BEFORE:
+ case GTK_TREE_VIEW_DROP_INTO_OR_BEFORE:
+ if(q) {
+ q = q->prev;
+ //fprintf(stderr, " ...but we like to drop near %s\n",
+ // q ? q->id : "NULL");
}
+ break;
+ default:
+ break;
}
/* Guarantee we never drop an empty list */
if(!tracks->nvec)
ql->drop(ql, tracks->nvec, tracks->vec, NULL, q);
break;
}
+ if(path)
+ gtk_tree_path_free(path);
}
/** @brief Initialize a @ref queuelike */
/* The selection should support multiple things being selected */
ql->selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(ql->view));
+ g_object_ref(ql->selection);
gtk_tree_selection_set_mode(ql->selection, GTK_SELECTION_MULTIPLE);
/* Catch button presses */
queuelike_targets,
sizeof queuelike_targets / sizeof *queuelike_targets,
GDK_ACTION_MOVE|GDK_ACTION_COPY);
- g_signal_connect(ql->view, "drag-begin",
- G_CALLBACK(ql_drag_begin), ql);
g_signal_connect(ql->view, "drag-motion",
G_CALLBACK(ql_drag_motion), ql);
g_signal_connect(ql->view, "drag-leave",
G_CALLBACK(ql_drag_data_get), ql);
g_signal_connect(ql->view, "drag-data-received",
G_CALLBACK(ql_drag_data_received), ql);
- make_treeview_multidrag(ql->view);
+ make_treeview_multidrag(ql->view, NULL);
+ // TODO playing track should be refused by predicate arg
} else {
/* For queues that cannot accept a drop we still accept a copy out */
gtk_drag_source_set(ql->view,
queuelike_targets,
sizeof queuelike_targets / sizeof *queuelike_targets,
GDK_ACTION_COPY);
- g_signal_connect(ql->view, "drag-begin",
- G_CALLBACK(ql_drag_begin), ql);
g_signal_connect(ql->view, "drag-data-get",
G_CALLBACK(ql_drag_data_get), ql);
- make_treeview_multidrag(ql->view);
+ make_treeview_multidrag(ql->view, NULL);
}
/* TODO style? */
- ql->init(ql);
+ if(ql->init)
+ ql->init(ql);
/* Update display text when lookups complete */
event_register("lookups-completed", queue_lookups_completed, ql);
return scrolled;
}
+/** @brief Destroy a queuelike
+ * @param ql Queuelike to destroy
+ *
+ * Returns @p ql to its initial state.
+ */
+void destroy_queuelike(struct queuelike *ql) {
+ if(ql->store) {
+ g_object_unref(ql->store);
+ ql->store = NULL;
+ }
+ if(ql->view) {
+ gtk_object_destroy(GTK_OBJECT(ql->view));
+ ql->view = NULL;
+ }
+ if(ql->menu) {
+ gtk_object_destroy(GTK_OBJECT(ql->menu));
+ ql->menu = NULL;
+ }
+ if(ql->selection) {
+ g_object_unref(ql->selection);
+ ql->selection = NULL;
+ }
+ ql->q = NULL;
+}
+
/*
Local Variables:
c-basic-offset:2
~mdw / disorder / blobdiff