From 5c1676dfe6d2f3c837a5e074117b45613fd29a72 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:30:19 +0200 Subject: Adding upstream version 2.10.34. Signed-off-by: Daniel Baumann --- app/widgets/gimpcontainertreeview-dnd.c | 733 ++++++++++++++++++++++++++++++++ 1 file changed, 733 insertions(+) create mode 100644 app/widgets/gimpcontainertreeview-dnd.c (limited to 'app/widgets/gimpcontainertreeview-dnd.c') diff --git a/app/widgets/gimpcontainertreeview-dnd.c b/app/widgets/gimpcontainertreeview-dnd.c new file mode 100644 index 0000000..720488e --- /dev/null +++ b/app/widgets/gimpcontainertreeview-dnd.c @@ -0,0 +1,733 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimpcontainertreeview-dnd.c + * Copyright (C) 2003-2009 Michael Natterer + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#include "config.h" + +#include +#include + +#include "widgets-types.h" + +#include "core/gimpcontainer.h" +#include "core/gimpviewable.h" + +#include "gimpcontainertreestore.h" +#include "gimpcontainertreeview.h" +#include "gimpcontainertreeview-dnd.h" +#include "gimpcontainertreeview-private.h" +#include "gimpcontainerview.h" +#include "gimpdnd.h" +#include "gimpviewrenderer.h" +#include "gimpselectiondata.h" + + +static gboolean +gimp_container_tree_view_drop_status (GimpContainerTreeView *tree_view, + GdkDragContext *context, + gint x, + gint y, + guint time, + GtkTreePath **return_path, + GdkAtom *return_atom, + GimpDndType *return_src_type, + GimpViewable **return_src, + GimpViewable **return_dest, + GtkTreeViewDropPosition *return_pos) +{ + GimpViewable *src_viewable = NULL; + GimpViewable *dest_viewable = NULL; + GtkTreePath *drop_path = NULL; + GtkTargetList *target_list; + GdkAtom target_atom; + GimpDndType src_type; + GtkTreeViewDropPosition drop_pos = GTK_TREE_VIEW_DROP_BEFORE; + GdkDragAction drag_action = 0; + + if (! gimp_container_view_get_container (GIMP_CONTAINER_VIEW (tree_view)) || + ! gimp_container_view_get_reorderable (GIMP_CONTAINER_VIEW (tree_view))) + goto drop_impossible; + + target_list = gtk_drag_dest_get_target_list (GTK_WIDGET (tree_view->view)); + target_atom = gtk_drag_dest_find_target (GTK_WIDGET (tree_view->view), + context, target_list); + if (! gtk_target_list_find (target_list, target_atom, &src_type)) + goto drop_impossible; + + switch (src_type) + { + case GIMP_DND_TYPE_URI_LIST: + case GIMP_DND_TYPE_TEXT_PLAIN: + case GIMP_DND_TYPE_NETSCAPE_URL: + case GIMP_DND_TYPE_COLOR: + case GIMP_DND_TYPE_SVG: + case GIMP_DND_TYPE_SVG_XML: + case GIMP_DND_TYPE_COMPONENT: + case GIMP_DND_TYPE_PIXBUF: + break; + + default: + { + GtkWidget *src_widget = gtk_drag_get_source_widget (context); + + if (! src_widget) + goto drop_impossible; + + src_viewable = gimp_dnd_get_drag_data (src_widget); + + if (! GIMP_IS_VIEWABLE (src_viewable)) + goto drop_impossible; + } + break; + } + + gtk_tree_view_convert_widget_to_bin_window_coords (tree_view->view, x, y, &x, &y); + if (gtk_tree_view_get_path_at_pos (tree_view->view, x, y, + &drop_path, NULL, NULL, NULL)) + { + GimpViewRenderer *renderer; + GtkTreeIter iter; + GdkRectangle cell_area; + + gtk_tree_model_get_iter (tree_view->model, &iter, drop_path); + + gtk_tree_model_get (tree_view->model, &iter, + GIMP_CONTAINER_TREE_STORE_COLUMN_RENDERER, &renderer, + -1); + + dest_viewable = renderer->viewable; + + g_object_unref (renderer); + + gtk_tree_view_get_cell_area (tree_view->view, drop_path, NULL, &cell_area); + + if (gimp_viewable_get_children (dest_viewable)) + { + if (gtk_tree_view_row_expanded (tree_view->view, drop_path)) + { + if (y >= (cell_area.y + cell_area.height / 2)) + drop_pos = GTK_TREE_VIEW_DROP_INTO_OR_AFTER; + else + drop_pos = GTK_TREE_VIEW_DROP_BEFORE; + } + else + { + if (y >= (cell_area.y + 2 * (cell_area.height / 3))) + drop_pos = GTK_TREE_VIEW_DROP_AFTER; + else if (y <= (cell_area.y + cell_area.height / 3)) + drop_pos = GTK_TREE_VIEW_DROP_BEFORE; + else + drop_pos = GTK_TREE_VIEW_DROP_INTO_OR_AFTER; + } + } + else + { + if (y >= (cell_area.y + cell_area.height / 2)) + drop_pos = GTK_TREE_VIEW_DROP_AFTER; + else + drop_pos = GTK_TREE_VIEW_DROP_BEFORE; + } + } + else + { + GtkTreeIter iter; + gint n_children; + + n_children = gtk_tree_model_iter_n_children (tree_view->model, NULL); + + if (n_children > 0 && + gtk_tree_model_iter_nth_child (tree_view->model, &iter, + NULL, n_children - 1)) + { + GimpViewRenderer *renderer; + + gtk_tree_model_get (tree_view->model, &iter, + GIMP_CONTAINER_TREE_STORE_COLUMN_RENDERER, + &renderer, + -1); + + drop_path = gtk_tree_model_get_path (tree_view->model, &iter); + dest_viewable = renderer->viewable; + drop_pos = GTK_TREE_VIEW_DROP_AFTER; + + g_object_unref (renderer); + } + } + + if (dest_viewable || tree_view->priv->dnd_drop_to_empty) + { + if (GIMP_CONTAINER_TREE_VIEW_GET_CLASS (tree_view)->drop_possible (tree_view, + src_type, + src_viewable, + dest_viewable, + drop_path, + drop_pos, + &drop_pos, + &drag_action)) + { + gdk_drag_status (context, drag_action, time); + + if (return_path) + *return_path = drop_path; + else + gtk_tree_path_free (drop_path); + + if (return_atom) + *return_atom = target_atom; + + if (return_src) + *return_src = src_viewable; + + if (return_dest) + *return_dest = dest_viewable; + + if (return_pos) + *return_pos = drop_pos; + + return TRUE; + } + + gtk_tree_path_free (drop_path); + } + + drop_impossible: + + gdk_drag_status (context, 0, time); + + return FALSE; +} + +#define SCROLL_DISTANCE 30 +#define SCROLL_STEP 10 +#define SCROLL_INTERVAL 5 +/* #define SCROLL_DEBUG 1 */ + +static gboolean +gimp_container_tree_view_scroll_timeout (gpointer data) +{ + GimpContainerTreeView *tree_view = GIMP_CONTAINER_TREE_VIEW (data); + GtkAdjustment *adj; + gdouble new_value; + + adj = gtk_tree_view_get_vadjustment (GTK_TREE_VIEW (tree_view->view)); + +#ifdef SCROLL_DEBUG + g_print ("scroll_timeout: scrolling by %d\n", SCROLL_STEP); +#endif + + if (tree_view->priv->scroll_dir == GDK_SCROLL_UP) + new_value = gtk_adjustment_get_value (adj) - SCROLL_STEP; + else + new_value = gtk_adjustment_get_value (adj) + SCROLL_STEP; + + new_value = CLAMP (new_value, + gtk_adjustment_get_lower (adj), + gtk_adjustment_get_upper (adj) - + gtk_adjustment_get_page_size (adj)); + + gtk_adjustment_set_value (adj, new_value); + + if (tree_view->priv->scroll_timeout_id) + { + g_source_remove (tree_view->priv->scroll_timeout_id); + + tree_view->priv->scroll_timeout_id = + g_timeout_add (tree_view->priv->scroll_timeout_interval, + gimp_container_tree_view_scroll_timeout, + tree_view); + } + + return FALSE; +} + +void +gimp_container_tree_view_drag_failed (GtkWidget *widget, + GdkDragContext *context, + GtkDragResult result, + GimpContainerTreeView *tree_view) +{ + if (tree_view->priv->scroll_timeout_id) + { + g_source_remove (tree_view->priv->scroll_timeout_id); + tree_view->priv->scroll_timeout_id = 0; + } + + gtk_tree_view_set_drag_dest_row (tree_view->view, NULL, 0); +} + +void +gimp_container_tree_view_drag_leave (GtkWidget *widget, + GdkDragContext *context, + guint time, + GimpContainerTreeView *tree_view) +{ + if (tree_view->priv->scroll_timeout_id) + { + g_source_remove (tree_view->priv->scroll_timeout_id); + tree_view->priv->scroll_timeout_id = 0; + } + + gtk_tree_view_set_drag_dest_row (tree_view->view, NULL, 0); +} + +gboolean +gimp_container_tree_view_drag_motion (GtkWidget *widget, + GdkDragContext *context, + gint x, + gint y, + guint time, + GimpContainerTreeView *tree_view) +{ + GtkAllocation allocation; + GtkTreePath *drop_path; + GtkTreeViewDropPosition drop_pos; + + gtk_widget_get_allocation (widget, &allocation); + + if (y < SCROLL_DISTANCE || y > (allocation.height - SCROLL_DISTANCE)) + { + gint distance; + + if (y < SCROLL_DISTANCE) + { + tree_view->priv->scroll_dir = GDK_SCROLL_UP; + distance = MIN (-y, -1); + } + else + { + tree_view->priv->scroll_dir = GDK_SCROLL_DOWN; + distance = MAX (allocation.height - y, 1); + } + + tree_view->priv->scroll_timeout_interval = SCROLL_INTERVAL * ABS (distance); + +#ifdef SCROLL_DEBUG + g_print ("drag_motion: scroll_distance = %d scroll_interval = %d\n", + distance, tree_view->priv->scroll_timeout_interval); +#endif + + if (! tree_view->priv->scroll_timeout_id) + tree_view->priv->scroll_timeout_id = + g_timeout_add (tree_view->priv->scroll_timeout_interval, + gimp_container_tree_view_scroll_timeout, + tree_view); + } + else if (tree_view->priv->scroll_timeout_id) + { + g_source_remove (tree_view->priv->scroll_timeout_id); + tree_view->priv->scroll_timeout_id = 0; + } + + if (gimp_container_tree_view_drop_status (tree_view, + context, x, y, time, + &drop_path, NULL, NULL, NULL, NULL, + &drop_pos)) + { + gtk_tree_view_set_drag_dest_row (tree_view->view, drop_path, drop_pos); + gtk_tree_path_free (drop_path); + } + else + { + gtk_tree_view_set_drag_dest_row (tree_view->view, NULL, 0); + } + + /* always return TRUE so drag_leave() is called */ + return TRUE; +} + +gboolean +gimp_container_tree_view_drag_drop (GtkWidget *widget, + GdkDragContext *context, + gint x, + gint y, + guint time, + GimpContainerTreeView *tree_view) +{ + GimpDndType src_type; + GimpViewable *src_viewable; + GimpViewable *dest_viewable; + GdkAtom target; + GtkTreeViewDropPosition drop_pos; + + if (tree_view->priv->scroll_timeout_id) + { + g_source_remove (tree_view->priv->scroll_timeout_id); + tree_view->priv->scroll_timeout_id = 0; + } + + if (gimp_container_tree_view_drop_status (tree_view, + context, x, y, time, + NULL, &target, &src_type, + &src_viewable, + &dest_viewable, &drop_pos)) + { + GimpContainerTreeViewClass *tree_view_class; + + tree_view_class = GIMP_CONTAINER_TREE_VIEW_GET_CLASS (tree_view); + + if (src_viewable) + { + gboolean success = TRUE; + + /* XXX: Make GimpContainerTreeViewClass::drop_viewable() + * return success? + */ + tree_view_class->drop_viewable (tree_view, src_viewable, + dest_viewable, drop_pos); + + gtk_drag_finish (context, success, FALSE, time); + } + else + { + gtk_drag_get_data (widget, context, target, time); + } + + return TRUE; + } + + return FALSE; +} + +void +gimp_container_tree_view_drag_data_received (GtkWidget *widget, + GdkDragContext *context, + gint x, + gint y, + GtkSelectionData *selection_data, + guint info, + guint time, + GimpContainerTreeView *tree_view) +{ + GimpViewable *dest_viewable; + GtkTreeViewDropPosition drop_pos; + gboolean success = FALSE; + + if (gimp_container_tree_view_drop_status (tree_view, + context, x, y, time, + NULL, NULL, NULL, NULL, + &dest_viewable, &drop_pos)) + { + GimpContainerTreeViewClass *tree_view_class; + + tree_view_class = GIMP_CONTAINER_TREE_VIEW_GET_CLASS (tree_view); + + switch (info) + { + case GIMP_DND_TYPE_URI_LIST: + case GIMP_DND_TYPE_TEXT_PLAIN: + case GIMP_DND_TYPE_NETSCAPE_URL: + if (tree_view_class->drop_uri_list) + { + GList *uri_list; + + uri_list = gimp_selection_data_get_uri_list (selection_data); + + if (uri_list) + { + tree_view_class->drop_uri_list (tree_view, uri_list, + dest_viewable, drop_pos); + + g_list_free_full (uri_list, (GDestroyNotify) g_free); + + success = TRUE; + } + } + break; + + case GIMP_DND_TYPE_COLOR: + if (tree_view_class->drop_color) + { + GimpRGB color; + + if (gimp_selection_data_get_color (selection_data, &color)) + { + tree_view_class->drop_color (tree_view, &color, + dest_viewable, drop_pos); + + success = TRUE; + } + } + break; + + case GIMP_DND_TYPE_SVG: + case GIMP_DND_TYPE_SVG_XML: + if (tree_view_class->drop_svg) + { + const guchar *stream; + gsize stream_length; + + stream = gimp_selection_data_get_stream (selection_data, + &stream_length); + + if (stream) + { + tree_view_class->drop_svg (tree_view, + (const gchar *) stream, + stream_length, + dest_viewable, drop_pos); + + success = TRUE; + } + } + break; + + case GIMP_DND_TYPE_COMPONENT: + if (tree_view_class->drop_component) + { + GimpImage *image = NULL; + GimpChannelType component; + + if (tree_view->dnd_gimp) + image = gimp_selection_data_get_component (selection_data, + tree_view->dnd_gimp, + &component); + + if (image) + { + tree_view_class->drop_component (tree_view, + image, component, + dest_viewable, drop_pos); + + success = TRUE; + } + } + break; + + case GIMP_DND_TYPE_PIXBUF: + if (tree_view_class->drop_pixbuf) + { + GdkPixbuf *pixbuf; + + pixbuf = gtk_selection_data_get_pixbuf (selection_data); + + if (pixbuf) + { + tree_view_class->drop_pixbuf (tree_view, + pixbuf, + dest_viewable, drop_pos); + g_object_unref (pixbuf); + + success = TRUE; + } + } + break; + + default: + break; + } + } + + gtk_drag_finish (context, success, FALSE, time); +} + +gboolean +gimp_container_tree_view_real_drop_possible (GimpContainerTreeView *tree_view, + GimpDndType src_type, + GimpViewable *src_viewable, + GimpViewable *dest_viewable, + GtkTreePath *drop_path, + GtkTreeViewDropPosition drop_pos, + GtkTreeViewDropPosition *return_drop_pos, + GdkDragAction *return_drag_action) +{ + GimpContainerView *view = GIMP_CONTAINER_VIEW (tree_view); + GimpContainer *container = gimp_container_view_get_container (view); + GimpContainer *src_container = NULL; + GimpContainer *dest_container = NULL; + gint src_index = -1; + gint dest_index = -1; + + if (src_viewable) + { + GimpViewable *parent = gimp_viewable_get_parent (src_viewable); + + if (parent) + src_container = gimp_viewable_get_children (parent); + else if (gimp_container_have (container, GIMP_OBJECT (src_viewable))) + src_container = container; + + if (src_container) + src_index = gimp_container_get_child_index (src_container, + GIMP_OBJECT (src_viewable)); + } + + if (dest_viewable) + { + GimpViewable *parent; + + /* dropping on the lower third of a group item drops into that group */ + if (drop_pos == GTK_TREE_VIEW_DROP_INTO_OR_AFTER && + gimp_viewable_get_children (dest_viewable)) + { + parent = dest_viewable; + } + else + { + parent = gimp_viewable_get_parent (dest_viewable); + } + + if (parent) + dest_container = gimp_viewable_get_children (parent); + else if (gimp_container_have (container, GIMP_OBJECT (dest_viewable))) + dest_container = container; + + if (parent == dest_viewable) + dest_index = 0; + else + dest_index = gimp_container_get_child_index (dest_container, + GIMP_OBJECT (dest_viewable)); + } + + if (src_viewable && g_type_is_a (G_TYPE_FROM_INSTANCE (src_viewable), + gimp_container_get_children_type (container))) + { + if (src_viewable == dest_viewable) + return FALSE; + + if (src_index == -1 || dest_index == -1) + return FALSE; + + /* don't allow dropping a parent node onto one of its descendants + */ + if (gimp_viewable_is_ancestor (src_viewable, dest_viewable)) + return FALSE; + } + + if (src_container == dest_container) + { + if (drop_pos == GTK_TREE_VIEW_DROP_BEFORE) + { + if (dest_index == (src_index + 1)) + return FALSE; + } + else if (drop_pos == GTK_TREE_VIEW_DROP_AFTER) + { + if (dest_index == (src_index - 1)) + return FALSE; + } + } + + if (return_drop_pos) + *return_drop_pos = drop_pos; + + if (return_drag_action) + { + if (src_viewable && g_type_is_a (G_TYPE_FROM_INSTANCE (src_viewable), + gimp_container_get_children_type (container))) + *return_drag_action = GDK_ACTION_MOVE; + else + *return_drag_action = GDK_ACTION_COPY; + } + + return TRUE; +} + +void +gimp_container_tree_view_real_drop_viewable (GimpContainerTreeView *tree_view, + GimpViewable *src_viewable, + GimpViewable *dest_viewable, + GtkTreeViewDropPosition drop_pos) +{ + GimpContainerView *view = GIMP_CONTAINER_VIEW (tree_view); + GimpContainer *src_container; + GimpContainer *dest_container; + gint dest_index = 0; + + if (gimp_viewable_get_parent (src_viewable)) + { + src_container = gimp_viewable_get_children ( + gimp_viewable_get_parent (src_viewable)); + } + else + { + src_container = gimp_container_view_get_container (view); + } + + if ((drop_pos == GTK_TREE_VIEW_DROP_INTO_OR_AFTER || + drop_pos == GTK_TREE_VIEW_DROP_INTO_OR_BEFORE) && + gimp_viewable_get_children (dest_viewable)) + { + dest_container = gimp_viewable_get_children (dest_viewable); + dest_viewable = NULL; + drop_pos = GTK_TREE_VIEW_DROP_BEFORE; + } + else if (gimp_viewable_get_parent (dest_viewable)) + { + dest_container = gimp_viewable_get_children ( + gimp_viewable_get_parent (dest_viewable)); + } + else + { + dest_container = gimp_container_view_get_container (view); + } + + if (dest_viewable) + { + dest_index = gimp_container_get_child_index (dest_container, + GIMP_OBJECT (dest_viewable)); + } + + if (src_container == dest_container) + { + gint src_index; + + src_index = gimp_container_get_child_index (src_container, + GIMP_OBJECT (src_viewable)); + + switch (drop_pos) + { + case GTK_TREE_VIEW_DROP_AFTER: + case GTK_TREE_VIEW_DROP_INTO_OR_AFTER: + if (src_index > dest_index) + dest_index++; + break; + + case GTK_TREE_VIEW_DROP_BEFORE: + case GTK_TREE_VIEW_DROP_INTO_OR_BEFORE: + if (src_index < dest_index) + dest_index--; + break; + } + + gimp_container_reorder (src_container, + GIMP_OBJECT (src_viewable), dest_index); + } + else + { + switch (drop_pos) + { + case GTK_TREE_VIEW_DROP_AFTER: + case GTK_TREE_VIEW_DROP_INTO_OR_AFTER: + dest_index++; + break; + + case GTK_TREE_VIEW_DROP_BEFORE: + case GTK_TREE_VIEW_DROP_INTO_OR_BEFORE: + break; + } + + g_object_ref (src_viewable); + + gimp_container_remove (src_container, GIMP_OBJECT (src_viewable)); + gimp_container_insert (dest_container, GIMP_OBJECT (src_viewable), + dest_index); + + g_object_unref (src_viewable); + } +} -- cgit v1.2.3