Tool System: loopcut preview & activate on click

The loop cut tool now works as expected for the tool-system,
where hovering previews the loop and clicking activates.

This uses a new gizmo type to pre-select the edge.

1 files changed, 89 insertions, 0 deletions

diff --git a/source/blender/editors/space_view3d/view3d_gizmo_preselect.c b/source/blender/editors/space_view3d/view3d_gizmo_preselect.c
new file mode 100644
index 00000000000..aebad326a57
--- /dev/null
+++ b/source/blender/editors/space_view3d/view3d_gizmo_preselect.c
@@ -0,0 +1,89 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * 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 2
+ * 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, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file blender/editors/space_view3d/view3d_gizmo_preselect.c
+ *  \ingroup spview3d
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_blenlib.h"
+#include "BLI_math.h"
+#include "BLI_utildefines.h"
+
+#include "BKE_context.h"
+
+#include "ED_screen.h"
+
+#include "UI_resources.h"
+
+#include "WM_api.h"
+#include "WM_types.h"
+#include "WM_toolsystem.h"
+
+#include "view3d_intern.h"  /* own include */
+
+/* -------------------------------------------------------------------- */
+/** \name Mesh Pre-Select Edge Ring Gizmo
+ *
+ * \{ */
+
+struct GizmoGroupPreSelEdgeRing {
+	wmGizmo *gizmo;
+};
+
+static bool WIDGETGROUP_mesh_preselect_edgering_poll(const bContext *C, wmGizmoGroupType *gzgt)
+{
+	bToolRef_Runtime *tref_rt = WM_toolsystem_runtime_from_context((bContext *)C);
+	if ((tref_rt == NULL) ||
+	    !STREQ(gzgt->idname, tref_rt->gizmo_group))
+	{
+		WM_gizmo_group_type_unlink_delayed_ptr(gzgt);
+		return false;
+	}
+	return true;
+}
+
+static void WIDGETGROUP_mesh_preselect_edgering_setup(const bContext *UNUSED(C), wmGizmoGroup *gzgroup)
+{
+	const wmGizmoType *gzt_presel = WM_gizmotype_find("GIZMO_GT_preselect_edgering_3d", true);
+	struct GizmoGroupPreSelEdgeRing *man = MEM_callocN(sizeof(struct GizmoGroupPreSelEdgeRing), __func__);
+	gzgroup->customdata = man;
+
+	wmGizmo *gz = man->gizmo = WM_gizmo_new_ptr(gzt_presel, gzgroup, NULL);
+	UI_GetThemeColor3fv(TH_GIZMO_PRIMARY, gz->color);
+	UI_GetThemeColor3fv(TH_GIZMO_HI, gz->color_hi);
+}
+
+void VIEW3D_GGT_mesh_preselect_edgering(wmGizmoGroupType *gzgt)
+{
+	gzgt->name = "Mesh Preselect Edge Ring";
+	gzgt->idname = "VIEW3D_GGT_mesh_preselect_edgering";
+
+	gzgt->flag = WM_GIZMOGROUPTYPE_3D;
+
+	gzgt->gzmap_params.spaceid = SPACE_VIEW3D;
+	gzgt->gzmap_params.regionid = RGN_TYPE_WINDOW;
+
+	gzgt->poll = WIDGETGROUP_mesh_preselect_edgering_poll;
+	gzgt->setup = WIDGETGROUP_mesh_preselect_edgering_setup;
+}
+
+/** \} */