View selected support for grease-pencil

source/blender/editors/gpencil/gpencil_utils.c

@@ -641,3 +641,21 @@ void gp_subdivide_stroke(bGPDstroke *gps, const int new_totpoints)
 }
 
 /* ******************************************************** */
+
+
+bool ED_gpencil_stroke_minmax(
+        const bGPDstroke *gps, const bool use_select,
+        float r_min[3], float r_max[3])
+{
+	const bGPDspoint *pt;
+	int i;
+	bool changed = false;
+
+	for (i = 0, pt = gps->points; i < gps->totpoints; i++, pt++) {
+		if ((use_select == false) || (pt->flag & GP_SPOINT_SELECT)) {;
+			minmax_v3v3_v3(r_min, r_max, &pt->x);
+			changed = true;
+		}
+	}
+	return changed;
+}

source/blender/editors/include/ED_gpencil.h

@@ -86,6 +86,10 @@ bool ED_gpencil_has_keyframe_v3d(struct Scene *scene, struct Object *ob, int cfr
 bool ED_gpencil_stroke_can_use_direct(const struct ScrArea *sa, const struct bGPDstroke *gps);
 bool ED_gpencil_stroke_can_use(const struct bContext *C, const struct bGPDstroke *gps);
 
+bool ED_gpencil_stroke_minmax(
+        const struct bGPDstroke *gps, const bool use_select,
+        float r_min[3], float r_max[3]);
+
 /* ----------- Grease Pencil Operators ----------------- */
 
 void ED_keymap_gpencil(struct wmKeyConfig *keyconf);

source/blender/editors/space_view3d/view3d_edit.c

@@ -37,6 +37,7 @@
 #include "DNA_curve_types.h"
 #include "DNA_object_types.h"
 #include "DNA_scene_types.h"
+#include "DNA_gpencil_types.h"
 
 #include "MEM_guardedalloc.h"
 
@@ -74,6 +75,7 @@
 #include "ED_screen.h"
 #include "ED_transform.h"
 #include "ED_mesh.h"
+#include "ED_gpencil.h"
 #include "ED_view3d.h"
 
 #include "UI_resources.h"
@@ -3019,6 +3021,8 @@ static int viewselected_exec(bContext *C, wmOperator *op)
 	ARegion *ar = CTX_wm_region(C);
 	View3D *v3d = CTX_wm_view3d(C);
 	Scene *scene = CTX_data_scene(C);
+	bGPdata *gpd = CTX_data_gpencil_data(C);
+	const bool is_gp_edit = ((gpd) && (gpd->flag & GP_DATA_STROKE_EDITMODE));
 	Object *ob = OBACT;
 	Object *obedit = CTX_data_edit_object(C);
 	float min[3], max[3];
@@ -3031,6 +3035,10 @@ static int viewselected_exec(bContext *C, wmOperator *op)
 
 	INIT_MINMAX(min, max);
 
+	if (is_gp_edit) {
+		ob = NULL;
+	}
+
 	if (ob && (ob->mode & OB_MODE_WEIGHT_PAINT)) {
 		/* hard-coded exception, we look for the one selected armature */
 		/* this is weak code this way, we should make a generic active/selection callback interface once... */
@@ -3047,7 +3055,19 @@ static int viewselected_exec(bContext *C, wmOperator *op)
 	}
 
 
-	if (obedit) {
+	if (is_gp_edit) {
+		CTX_DATA_BEGIN(C, bGPDstroke *, gps, editable_gpencil_strokes)
+		{
+			/* we're only interested in selected points here... */
+			if ((gps->flag & GP_STROKE_SELECT) && (gps->flag & GP_STROKE_3DSPACE)) {
+				if (ED_gpencil_stroke_minmax(gps, true, min, max)) {
+					ok = true;
+				}
+			}
+		}
+		CTX_DATA_END;
+	}
+	else if (obedit) {
 		ok = ED_view3d_minmax_verts(obedit, min, max);    /* only selected */
 	}
 	else if (ob && (ob->mode & OB_MODE_POSE)) {