GPencil: Implement Opacity transform
[blender.git] / source / blender / editors / transform / transform.c
index 89536f5..4135a1b 100644 (file)
@@ -205,6 +205,9 @@ static void applyAlign(TransInfo *t, const int mval[2]);
 
 static void initSeqSlide(TransInfo *t);
 static void applySeqSlide(TransInfo *t, const int mval[2]);
+
+static void initGPOpacity(TransInfo *t);
+static void applyGPOpacity(TransInfo *t, const int mval[2]);
 /* end transform callbacks */
 
 
@@ -2613,6 +2616,9 @@ bool initTransform(bContext *C, TransInfo *t, wmOperator *op, const wmEvent *eve
                case TFM_NORMAL_ROTATION:
                        initNormalRotation(t);
                        break;
+               case TFM_GPENCIL_OPACITY:
+                       initGPOpacity(t);
+                       break;
        }
 
        if (t->state == TRANS_CANCEL) {
@@ -5525,6 +5531,84 @@ static void applyGPShrinkFatten(TransInfo *t, const int UNUSED(mval[2]))
 }
 /** \} */
 
+/* -------------------------------------------------------------------- */
+/* Transform (GPencil Opacity) */
+
+/** \name Transform GPencil Strokes Opacity
+ * \{ */
+
+static void initGPOpacity(TransInfo *t)
+{
+       t->mode = TFM_GPENCIL_OPACITY;
+       t->transform = applyGPOpacity;
+
+       initMouseInputMode(t, &t->mouse, INPUT_SPRING);
+
+       t->idx_max = 0;
+       t->num.idx_max = 0;
+       t->snap[0] = 0.0f;
+       t->snap[1] = 0.1f;
+       t->snap[2] = t->snap[1] * 0.1f;
+
+       copy_v3_fl(t->num.val_inc, t->snap[1]);
+       t->num.unit_sys = t->scene->unit.system;
+       t->num.unit_type[0] = B_UNIT_NONE;
+
+       t->flag |= T_NO_ZERO;
+#ifdef USE_NUM_NO_ZERO
+       t->num.val_flag[0] |= NUM_NO_ZERO;
+#endif
+
+       t->flag |= T_NO_CONSTRAINT;
+}
+
+static void applyGPOpacity(TransInfo *t, const int UNUSED(mval[2]))
+{
+       float ratio;
+       int i;
+       char str[UI_MAX_DRAW_STR];
+
+       ratio = t->values[0];
+
+       snapGridIncrement(t, &ratio);
+
+       applyNumInput(&t->num, &ratio);
+
+       t->values[0] = ratio;
+
+       /* header print for NumInput */
+       if (hasNumInput(&t->num)) {
+               char c[NUM_STR_REP_LEN];
+
+               outputNumInput(&(t->num), c, &t->scene->unit);
+               BLI_snprintf(str, sizeof(str), IFACE_("Opacity: %s"), c);
+       }
+       else {
+               BLI_snprintf(str, sizeof(str), IFACE_("Opacity: %3f"), ratio);
+       }
+
+       FOREACH_TRANS_DATA_CONTAINER(t, tc) {
+               TransData *td = tc->data;
+               for (i = 0; i < tc->data_len; i++, td++) {
+                       if (td->flag & TD_NOACTION)
+                               break;
+
+                       if (td->flag & TD_SKIP)
+                               continue;
+
+                       if (td->val) {
+                               *td->val = td->ival * ratio;
+                               /* apply PET */
+                               *td->val = (*td->val * td->factor) + ((1.0f - td->factor) * td->ival);
+                               CLAMP(*td->val, 0.0f, 1.0f);
+                       }
+               }
+       }
+
+       ED_area_status_text(t->sa, str);
+}
+/** \} */
+
 
 /* -------------------------------------------------------------------- */
 /* Transform (Push/Pull) */