1 files changed, 158 insertions, 0 deletions
diff --git a/src/display/sp-canvas-item.h b/src/display/sp-canvas-item.h
new file mode 100644
index 0000000..9856906
--- /dev/null
+++ b/src/display/sp-canvas-item.h
@@ -0,0 +1,158 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+#ifndef SEEN_SP_CANVAS_ITEM_H
+#define SEEN_SP_CANVAS_ITEM_H
+
+/**
+ * @file
+ * SPCanvasItem.
+ */
+/*
+ * Authors:
+ *   Federico Mena <federico@nuclecu.unam.mx>
+ *   Raph Levien <raph@gimp.org>
+ *   Lauris Kaplinski <lauris@kaplinski.com>
+ *   Jon A. Cruz <jon@joncruz.org>
+ *
+ * Copyright (C) 1998 The Free Software Foundation
+ * Copyright (C) 2002 Lauris Kaplinski
+ * Copyright (C) 2010 authors
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#include <2geom/rect.h>
+#include <boost/intrusive/list.hpp>
+#include <glib-object.h>
+
+#include "ui/control-types.h"
+
+G_BEGIN_DECLS
+
+struct SPCanvas;
+struct SPCanvasBuf;
+struct SPCanvasGroup;
+
+typedef struct _SPCanvasItemClass SPCanvasItemClass;
+typedef union  _GdkEvent          GdkEvent;
+typedef struct _GdkCursor         GdkCursor;
+
+#define SP_TYPE_CANVAS_ITEM (sp_canvas_item_get_type())
+#define SP_CANVAS_ITEM(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), SP_TYPE_CANVAS_ITEM, SPCanvasItem))
+#define SP_CANVAS_ITEM_CLASS(klass)      (G_TYPE_CHECK_CLASS_CAST ((klass), SP_TYPE_CANVAS_ITEM, SPCanvasItemClass))
+#define SP_IS_CANVAS_ITEM(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), SP_TYPE_CANVAS_ITEM))
+#define SP_CANVAS_ITEM_GET_CLASS(o) (G_TYPE_INSTANCE_GET_CLASS((o), SP_TYPE_CANVAS_ITEM, SPCanvasItemClass))
+
+
+/**
+ * An SPCanvasItem refers to a SPCanvas and to its parent item; it has
+ * four coordinates, a bounding rectangle, and a transformation matrix.
+ */
+struct SPCanvasItem {
+    GInitiallyUnowned parent_instance;
+
+    // boost linked list member hook
+    boost::intrusive::list_member_hook<> member_hook_;
+
+    SPCanvas *canvas;
+    SPCanvasItem *parent;
+
+    double x1;
+    double y1;
+    double x2;
+    double y2;
+    Geom::Rect bounds;
+    Geom::Affine xform;
+
+    int ctrlResize;
+    Inkscape::ControlType ctrlType;
+    Inkscape::ControlFlags ctrlFlags;
+
+    // Replacement for custom GtkObject flag enumeration
+    gboolean visible;
+    gboolean need_update;
+    gboolean need_affine;
+
+    // If true, then SPCanvasGroup::point() and sp_canvas_item_invoke_point() will calculate
+    // the distance to the pointer, such that this item can be picked in pickCurrentItem()
+    // Only if an item can be picked, then it can be set as current_item and receive events!
+    bool pickable;
+
+    bool in_destruction;
+};
+
+GType sp_canvas_item_get_type();
+
+//Define type for linked list storing SPCanvasItems
+typedef boost::intrusive::list<
+    SPCanvasItem,
+    boost::intrusive::member_hook<SPCanvasItem, boost::intrusive::list_member_hook<>, &SPCanvasItem::member_hook_> >
+    SPCanvasItemList;
+
+/**
+ * The vtable of an SPCanvasItem.
+ */
+struct _SPCanvasItemClass {
+    GInitiallyUnownedClass parent_class;
+
+    void (* update) (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);
+
+    void (* render) (SPCanvasItem *item, SPCanvasBuf *buf);
+    double (* point) (SPCanvasItem *item, Geom::Point p, SPCanvasItem **actual_item);
+
+    int (* event) (SPCanvasItem *item, GdkEvent *event);
+    void (* viewbox_changed) (SPCanvasItem *item, Geom::IntRect const &new_area);
+
+    /* Default signal handler for the ::destroy signal, which is
+     *  invoked to request that references to the widget be dropped.
+     *  If an object class overrides destroy() in order to perform class
+     *  specific destruction then it must still invoke its superclass'
+     *  implementation of the method after it is finished with its
+     *  own cleanup. (See gtk_widget_real_destroy() for an example of
+     *  how to do this).
+     */
+    void (*destroy)  (SPCanvasItem *object);
+};
+
+/**
+ * Constructs new SPCanvasItem on SPCanvasGroup.
+ */
+SPCanvasItem *sp_canvas_item_new(SPCanvasGroup *parent, GType type, const gchar *first_arg_name, ...);
+
+G_END_DECLS
+
+
+void sp_canvas_item_affine_absolute(SPCanvasItem *item, Geom::Affine const &aff);
+
+void sp_canvas_item_raise(SPCanvasItem *item, int positions);
+void sp_canvas_item_raise_to_top(SPCanvasItem *item);
+void sp_canvas_item_lower(SPCanvasItem *item, int positions);
+void sp_canvas_item_lower_to_bottom(SPCanvasItem *item);
+bool sp_canvas_item_is_visible(SPCanvasItem *item);
+void sp_canvas_item_show(SPCanvasItem *item);
+void sp_canvas_item_hide(SPCanvasItem *item);
+void sp_canvas_item_destroy(SPCanvasItem *item);
+int sp_canvas_item_grab(SPCanvasItem *item, unsigned int event_mask, GdkCursor *cursor, guint32 etime);
+void sp_canvas_item_ungrab(SPCanvasItem *item);
+
+Geom::Affine sp_canvas_item_i2w_affine(SPCanvasItem const *item);
+
+void sp_canvas_item_request_update(SPCanvasItem *item);
+
+/* get item z-order in parent group */
+
+gint sp_canvas_item_order(SPCanvasItem * item);
+
+
+
+#endif // SEEN_SP_CANVAS_ITEM_H
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :