1 files changed, 108 insertions, 0 deletions
diff --git a/src/ui/draw-anchor.cpp b/src/ui/draw-anchor.cpp
new file mode 100644
index 0000000..1b32525
--- /dev/null
+++ b/src/ui/draw-anchor.cpp
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/** \file
+ * Anchors implementation.
+ */
+
+/*
+ * Authors:
+ * Copyright (C) 2000 Lauris Kaplinski
+ * Copyright (C) 2000-2001 Ximian, Inc.
+ * Copyright (C) 2002 Lauris Kaplinski
+ * Copyright (C) 2004 Monash University
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+
+#include "ui/draw-anchor.h"
+#include "desktop.h"
+#include "ui/tools/tool-base.h"
+#include "ui/tools/lpe-tool.h"
+#include "display/sodipodi-ctrl.h"
+#include "display/curve.h"
+#include "ui/control-manager.h"
+
+using Inkscape::ControlManager;
+
+#define FILL_COLOR_NORMAL 0xffffff7f
+#define FILL_COLOR_MOUSEOVER 0xff0000ff
+
+/**
+ * Creates an anchor object and initializes it.
+ */
+SPDrawAnchor *sp_draw_anchor_new(Inkscape::UI::Tools::FreehandBase *dc, SPCurve *curve, bool start, Geom::Point delta)
+{
+    if (SP_IS_LPETOOL_CONTEXT(dc)) {
+        // suppress all kinds of anchors in LPEToolContext
+        return nullptr;
+    }
+
+    SPDrawAnchor *a = g_new(SPDrawAnchor, 1);
+
+    a->dc = dc;
+    a->curve = curve;
+    curve->ref();
+    a->start = start;
+    a->active = FALSE;
+    a->dp = delta;
+    a->ctrl = ControlManager::getManager().createControl(dc->getDesktop().getControls(), Inkscape::CTRL_TYPE_ANCHOR);
+
+    SP_CTRL(a->ctrl)->moveto(delta);
+
+    ControlManager::getManager().track(a->ctrl);
+
+    return a;
+}
+
+/**
+ * Destroys the anchor's canvas item and frees the anchor object.
+ */
+SPDrawAnchor *sp_draw_anchor_destroy(SPDrawAnchor *anchor)
+{
+    if (anchor->curve) {
+        anchor->curve->unref();
+    }
+    if (anchor->ctrl) {
+        sp_canvas_item_destroy(anchor->ctrl);
+    }
+    g_free(anchor);
+    return nullptr;
+}
+
+/**
+ * Test if point is near anchor, if so fill anchor on canvas and return
+ * pointer to it or NULL.
+ */
+SPDrawAnchor *sp_draw_anchor_test(SPDrawAnchor *anchor, Geom::Point w, bool activate)
+{
+    SPCtrl *ctrl = SP_CTRL(anchor->ctrl);
+
+    if ( activate && ( Geom::LInfty( w - anchor->dc->getDesktop().d2w(anchor->dp) ) <= (ctrl->box.width() / 2.0) ) ) {
+        if (!anchor->active) {
+            ControlManager::getManager().setControlResize(anchor->ctrl, 4);
+            g_object_set(anchor->ctrl, "fill_color", FILL_COLOR_MOUSEOVER, NULL);
+            anchor->active = TRUE;
+        }
+        return anchor;
+    }
+
+    if (anchor->active) {
+        ControlManager::getManager().setControlResize(anchor->ctrl, 0);
+        g_object_set(anchor->ctrl, "fill_color", FILL_COLOR_NORMAL, NULL);
+        anchor->active = FALSE;
+    }
+
+    return nullptr;
+}
+
+
+/*
+  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:fileencoding=utf-8:textwidth=99 :