Edge-scrolling for node editor

Starts scrolling when dragging a node or node link and going outside the current window.
Largely copied from the VIEW2D_OT_edge_pan operator.

Edge panning operator customdata and supporting functions now in
UI_view2d.h, so they could be used by operators in other editor
libraries. The VIEW2D_OT_edge_pan operator also uses this customdata and
shared functions now. Operators properties can be used to configure
edge panning margins and speed for each use case, rather than using
hardcoded values.

The speed function for edge panning has been tweaked somewhat:
* "Speed per pixel" has been replaced with a "speed ramp" distance.
  This is more intuitive and also creates an upper bound for the speed,
  which can otherwise become extreme with large cursor distance.
* "Max speed" is reached at the end of the speed ramp.
* Padding the region inside and outside is applied as before, but both
  values are operator properties now.

Node transform operator also supports edge panning. This requires
an offset for changes in the view2d rect, otherwise nodes are "stuck"
to the original view.

Transform operator had cursor wrapping categorically enabled, but this
gets quite confusing with the edge scrolling mechanism. A new TransInfo
option T_NO_CURSOR_WRAP has been introduced to disable this behavior.
The double negative is a bit annoying, but want to avoid affecting the
existing transform modes, so by default it should still set the
OP_IS_MODAL_GRAB_CURSOR flag (which then sets the WM_CURSOR_WRAP_XY
flag during modal execution).

Reviewed By: HooglyBoogly, JacquesLucke

Differential Revision: https://developer.blender.org/D11073

11 files changed, 514 insertions, 163 deletions

diff --git a/source/blender/editors/include/ED_node.h b/source/blender/editors/include/ED_node.h
index 67a50b83bd6..ba65840dc99 100644
--- a/source/blender/editors/include/ED_node.h
+++ b/source/blender/editors/include/ED_node.h
@@ -49,6 +49,11 @@ typedef enum {
 } NodeBorder;
 
 #define NODE_GRID_STEPS 5
+#define NODE_EDGE_PAN_INSIDE_PAD 2
+#define NODE_EDGE_PAN_OUTSIDE_PAD 0 /* Disable clamping for node panning, use whole screen. */
+#define NODE_EDGE_PAN_SPEED_RAMP 1
+#define NODE_EDGE_PAN_MAX_SPEED 40 /* In UI units per second, slower than default. */
+#define NODE_EDGE_PAN_DELAY 1.0f
 
 /* space_node.c */
 
diff --git a/source/blender/editors/include/UI_view2d.h b/source/blender/editors/include/UI_view2d.h
index 64f881052a1..999f42efe65 100644
--- a/source/blender/editors/include/UI_view2d.h
+++ b/source/blender/editors/include/UI_view2d.h
@@ -105,8 +105,12 @@ struct ScrArea;
 struct bContext;
 struct bScreen;
 struct rctf;
+struct rcti;
+struct wmEvent;
 struct wmGizmoGroupType;
 struct wmKeyConfig;
+struct wmOperator;
+struct wmOperatorType;
 
 typedef struct View2DScrollers View2DScrollers;
 
@@ -287,6 +291,77 @@ void UI_view2d_smooth_view(struct bContext *C,
 /* Caller passes in own idname.  */
 void VIEW2D_GGT_navigate_impl(struct wmGizmoGroupType *gzgt, const char *idname);
 
+/* Edge pan */
+
+/**
+ * Custom-data for view panning operators.
+ */
+typedef struct View2DEdgePanData {
+  /** Screen where view pan was initiated. */
+  struct bScreen *screen;
+  /** Area where view pan was initiated. */
+  struct ScrArea *area;
+  /** Region where view pan was initiated. */
+  struct ARegion *region;
+  /** View2d we're operating in. */
+  struct View2D *v2d;
+
+  /** Inside distance in UI units from the edge of the region within which to start panning. */
+  float inside_pad;
+  /** Outside distance in UI units from the edge of the region at which to stop panning. */
+  float outside_pad;
+  /**
+   * Width of the zone in UI units where speed increases with distance from the edge.
+   * At the end of this zone max speed is reached.
+   */
+  float speed_ramp;
+  /** Maximum speed in UI units per second. */
+  float max_speed;
+  /** Delay in seconds before maximum speed is reached. */
+  float delay;
+
+  /** Amount to move view relative to zoom. */
+  float facx, facy;
+
+  /* Timers. */
+  double edge_pan_last_time;
+  double edge_pan_start_time_x, edge_pan_start_time_y;
+} View2DEdgePanData;
+
+bool UI_view2d_edge_pan_poll(struct bContext *C);
+
+void UI_view2d_edge_pan_init(struct bContext *C,
+                             struct View2DEdgePanData *vpd,
+                             float inside_pad,
+                             float outside_pad,
+                             float speed_ramp,
+                             float max_speed,
+                             float delay);
+
+void UI_view2d_edge_pan_reset(struct View2DEdgePanData *vpd);
+
+/* Apply transform to view (i.e. adjust 'cur' rect). */
+void UI_view2d_edge_pan_apply(struct bContext *C, struct View2DEdgePanData *vpd, int x, int y);
+
+/* Apply transform to view using mouse events. */
+void UI_view2d_edge_pan_apply_event(struct bContext *C,
+                                    struct View2DEdgePanData *vpd,
+                                    const struct wmEvent *event);
+
+void UI_view2d_edge_pan_operator_properties(struct wmOperatorType *ot);
+
+void UI_view2d_edge_pan_operator_properties_ex(struct wmOperatorType *ot,
+                                               float inside_pad,
+                                               float outside_pad,
+                                               float speed_ramp,
+                                               float max_speed,
+                                               float delay);
+
+/* Initialize panning data with operator settings. */
+void UI_view2d_edge_pan_operator_init(struct bContext *C,
+                                      struct View2DEdgePanData *vpd,
+                                      struct wmOperator *op);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/blender/editors/interface/CMakeLists.txt b/source/blender/editors/interface/CMakeLists.txt
index 421019bebb8..5011a50ed73 100644
--- a/source/blender/editors/interface/CMakeLists.txt
+++ b/source/blender/editors/interface/CMakeLists.txt
@@ -75,6 +75,7 @@ set(SRC
   resources.c
   view2d.c
   view2d_draw.c
+  view2d_edge_pan.c
   view2d_gizmo_navigate.c
   view2d_ops.c
 
diff --git a/source/blender/editors/interface/view2d_edge_pan.c b/source/blender/editors/interface/view2d_edge_pan.c
new file mode 100644
index 00000000000..38364a687fd
--- /dev/null
+++ b/source/blender/editors/interface/view2d_edge_pan.c
@@ -0,0 +1,345 @@
+/*
+ * 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.
+ *
+ * The Original Code is Copyright (C) 2021 Blender Foundation
+ * All rights reserved.
+ */
+
+/** \file
+ * \ingroup spnode
+ */
+
+#include "BKE_context.h"
+
+#include "BLI_math.h"
+#include "BLI_rect.h"
+
+#include "ED_screen.h"
+
+#include "MEM_guardedalloc.h"
+
+#include "PIL_time.h"
+
+#include "RNA_access.h"
+#include "RNA_define.h"
+
+#include "UI_interface.h"
+#include "UI_view2d.h"
+
+#include "WM_api.h"
+#include "WM_types.h"
+
+/* -------------------------------------------------------------------- */
+/** \name Edge Pan Operator Utilties
+ * \{ */
+
+bool UI_view2d_edge_pan_poll(bContext *C)
+{
+  ARegion *region = CTX_wm_region(C);
+
+  /* Check if there's a region in context to work with. */
+  if (region == NULL) {
+    return false;
+  }
+
+  View2D *v2d = &region->v2d;
+
+  /* Check that 2d-view can pan. */
+  if ((v2d->keepofs & V2D_LOCKOFS_X) && (v2d->keepofs & V2D_LOCKOFS_Y)) {
+    return false;
+  }
+
+  /* View can pan. */
+  return true;
+}
+
+void UI_view2d_edge_pan_init(bContext *C,
+                             View2DEdgePanData *vpd,
+                             float inside_pad,
+                             float outside_pad,
+                             float speed_ramp,
+                             float max_speed,
+                             float delay)
+{
+  if (!UI_view2d_edge_pan_poll(C)) {
+    return;
+  }
+
+  /* Set pointers to owners. */
+  vpd->screen = CTX_wm_screen(C);
+  vpd->area = CTX_wm_area(C);
+  vpd->region = CTX_wm_region(C);
+  vpd->v2d = &vpd->region->v2d;
+
+  BLI_assert(speed_ramp > 0.0f);
+  vpd->inside_pad = inside_pad;
+  vpd->outside_pad = outside_pad;
+  vpd->speed_ramp = speed_ramp;
+  vpd->max_speed = max_speed;
+  vpd->delay = delay;
+
+  /* Calculate translation factor, based on size of view. */
+  const float winx = (float)(BLI_rcti_size_x(&vpd->region->winrct) + 1);
+  const float winy = (float)(BLI_rcti_size_y(&vpd->region->winrct) + 1);
+  vpd->facx = (BLI_rctf_size_x(&vpd->v2d->cur)) / winx;
+  vpd->facy = (BLI_rctf_size_y(&vpd->v2d->cur)) / winy;
+
+  UI_view2d_edge_pan_reset(vpd);
+}
+
+void UI_view2d_edge_pan_reset(View2DEdgePanData *vpd)
+{
+  vpd->edge_pan_start_time_x = 0.0;
+  vpd->edge_pan_start_time_y = 0.0;
+  vpd->edge_pan_last_time = PIL_check_seconds_timer();
+}
+
+/**
+ * Reset the edge pan timers if the mouse isn't in the scroll zone and
+ * start the timers when the mouse enters a scroll zone.
+ */
+static void edge_pan_manage_delay_timers(View2DEdgePanData *vpd,
+                                         int pan_dir_x,
+                                         int pan_dir_y,
+                                         const double current_time)
+{
+  if (pan_dir_x == 0) {
+    vpd->edge_pan_start_time_x = 0.0;
+  }
+  else if (vpd->edge_pan_start_time_x == 0.0) {
+    vpd->edge_pan_start_time_x = current_time;
+  }
+  if (pan_dir_y == 0) {
+    vpd->edge_pan_start_time_y = 0.0;
+  }
+  else if (vpd->edge_pan_start_time_y == 0.0) {
+    vpd->edge_pan_start_time_y = current_time;
+  }
+}
+
+/**
+ * Used to calculate a "fade in" factor for edge panning to make the interaction feel smooth
+ * and more purposeful.
+ *
+ * \note Assumes a domain_min of 0.0f.
+ */
+static float smootherstep(const float domain_max, float x)
+{
+  x = clamp_f(x / domain_max, 0.0, 1.0);
+  return x * x * x * (x * (x * 6.0 - 15.0) + 10.0);
+}
+
+static float edge_pan_speed(View2DEdgePanData *vpd,
+                            int event_loc,
+                            bool x_dir,
+                            const double current_time)
+{
+  ARegion *region = vpd->region;
+
+  /* Find the distance from the start of the drag zone. */
+  const int pad = vpd->inside_pad * U.widget_unit;
+  const int min = (x_dir ? region->winrct.xmin : region->winrct.ymin) + pad;
+  const int max = (x_dir ? region->winrct.xmax : region->winrct.ymax) - pad;
+  int distance = 0.0;
+  if (event_loc > max) {
+    distance = event_loc - max;
+  }
+  else if (event_loc < min) {
+    distance = min - event_loc;
+  }
+  else {
+    BLI_assert(!"Calculating speed outside of pan zones");
+    return 0.0f;
+  }
+  float distance_factor = distance / (vpd->speed_ramp * U.widget_unit);
+  CLAMP(distance_factor, 0.0f, 1.0f);
+
+  /* Apply a fade in to the speed based on a start time delay. */
+  const double start_time = x_dir ? vpd->edge_pan_start_time_x : vpd->edge_pan_start_time_y;
+  const float delay_factor = smootherstep(vpd->delay, (float)(current_time - start_time));
+
+  return distance_factor * delay_factor * vpd->max_speed * U.widget_unit * (float)U.dpi_fac;
+}
+
+static void edge_pan_apply_delta(bContext *C, View2DEdgePanData *vpd, float dx, float dy)
+{
+  View2D *v2d = vpd->v2d;
+  if (!v2d) {
+    return;
+  }
+
+  /* Calculate amount to move view by. */
+  dx *= vpd->facx;
+  dy *= vpd->facy;
+
+  /* Only move view on an axis if change is allowed. */
+  if ((v2d->keepofs & V2D_LOCKOFS_X) == 0) {
+    v2d->cur.xmin += dx;
+    v2d->cur.xmax += dx;
+  }
+  if ((v2d->keepofs & V2D_LOCKOFS_Y) == 0) {
+    v2d->cur.ymin += dy;
+    v2d->cur.ymax += dy;
+  }
+
+  /* Inform v2d about changes after this operation. */
+  UI_view2d_curRect_changed(C, v2d);
+
+  /* Don't rebuild full tree in outliner, since we're just changing our view. */
+  ED_region_tag_redraw_no_rebuild(vpd->region);
+
+  /* Request updates to be done. */
+  WM_event_add_mousemove(CTX_wm_window(C));
+
+  UI_view2d_sync(vpd->screen, vpd->area, v2d, V2D_LOCK_COPY);
+}
+
+void UI_view2d_edge_pan_apply(bContext *C, View2DEdgePanData *vpd, int x, int y)
+{
+  ARegion *region = vpd->region;
+
+  rcti inside_rect, outside_rect;
+  inside_rect = region->winrct;
+  outside_rect = region->winrct;
+  BLI_rcti_pad(&inside_rect, -vpd->inside_pad * U.widget_unit, -vpd->inside_pad * U.widget_unit);
+  BLI_rcti_pad(&outside_rect, vpd->outside_pad * U.widget_unit, vpd->outside_pad * U.widget_unit);
+
+  int pan_dir_x = 0;
+  int pan_dir_y = 0;
+  if ((vpd->outside_pad == 0) || BLI_rcti_isect_pt(&outside_rect, x, y)) {
+    /* Find whether the mouse is beyond X and Y edges. */
+    if (x > inside_rect.xmax) {
+      pan_dir_x = 1;
+    }
+    else if (x < inside_rect.xmin) {
+      pan_dir_x = -1;
+    }
+    if (y > inside_rect.ymax) {
+      pan_dir_y = 1;
+    }
+    else if (y < inside_rect.ymin) {
+      pan_dir_y = -1;
+    }
+  }
+
+  const double current_time = PIL_check_seconds_timer();
+  edge_pan_manage_delay_timers(vpd, pan_dir_x, pan_dir_y, current_time);
+
+  /* Calculate the delta since the last time the operator was called. */
+  const float dtime = (float)(current_time - vpd->edge_pan_last_time);
+  float dx = 0.0f, dy = 0.0f;
+  if (pan_dir_x != 0) {
+    const float speed = edge_pan_speed(vpd, x, true, current_time);
+    dx = dtime * speed * (float)pan_dir_x;
+  }
+  if (pan_dir_y != 0) {
+    const float speed = edge_pan_speed(vpd, y, false, current_time);
+    dy = dtime * speed * (float)pan_dir_y;
+  }
+  vpd->edge_pan_last_time = current_time;
+
+  /* Pan, clamping inside the regions's total bounds. */
+  edge_pan_apply_delta(C, vpd, dx, dy);
+}
+
+void UI_view2d_edge_pan_apply_event(bContext *C, View2DEdgePanData *vpd, const wmEvent *event)
+{
+  /* Only mousemove events matter here, ignore others. */
+  if (event->type != MOUSEMOVE) {
+    return;
+  }
+
+  UI_view2d_edge_pan_apply(C, vpd, event->x, event->y);
+}
+
+void UI_view2d_edge_pan_operator_properties(wmOperatorType *ot)
+{
+  /* Default values for edge panning operators. */
+  UI_view2d_edge_pan_operator_properties_ex(ot,
+                                            /*inside_pad*/ 1.0f,
+                                            /*outside_pad*/ 0.0f,
+                                            /*speed_ramp*/ 1.0f,
+                                            /*max_speed*/ 500.0f,
+                                            /*delay*/ 1.0f);
+}
+
+void UI_view2d_edge_pan_operator_properties_ex(struct wmOperatorType *ot,
+                                               float inside_pad,
+                                               float outside_pad,
+                                               float speed_ramp,
+                                               float max_speed,
+                                               float delay)
+{
+  RNA_def_float(
+      ot->srna,
+      "inside_padding",
+      inside_pad,
+      0.0f,
+      100.0f,
+      "Inside Padding",
+      "Inside distance in UI units from the edge of the region within which to start panning",
+      0.0f,
+      100.0f);
+  RNA_def_float(
+      ot->srna,
+      "outside_padding",
+      outside_pad,
+      0.0f,
+      100.0f,
+      "Outside Padding",
+      "Outside distance in UI units from the edge of the region at which to stop panning",
+      0.0f,
+      100.0f);
+  RNA_def_float(ot->srna,
+                "speed_ramp",
+                speed_ramp,
+                0.0f,
+                100.0f,
+                "Speed Ramp",
+                "Width of the zone in UI units where speed increases with distance from the edge",
+                0.0f,
+                100.0f);
+  RNA_def_float(ot->srna,
+                "max_speed",
+                max_speed,
+                0.0f,
+                10000.0f,
+                "Max Speed",
+                "Maximum speed in UI units per second",
+                0.0f,
+                10000.0f);
+  RNA_def_float(ot->srna,
+                "delay",
+                delay,
+                0.0f,
+                10.0f,
+                "Delay",
+                "Delay in seconds before maximum speed is reached",
+                0.0f,
+                10.0f);
+}
+
+void UI_view2d_edge_pan_operator_init(bContext *C, View2DEdgePanData *vpd, wmOperator *op)
+{
+  UI_view2d_edge_pan_init(C,
+                          vpd,
+                          RNA_float_get(op->ptr, "inside_padding"),
+                          RNA_float_get(op->ptr, "outside_padding"),
+                          RNA_float_get(op->ptr, "speed_ramp"),
+                          RNA_float_get(op->ptr, "max_speed"),
+                          RNA_float_get(op->ptr, "delay"));
+}
+
+/** \} */
diff --git a/source/blender/editors/interface/view2d_ops.c b/source/blender/editors/interface/view2d_ops.c
index 40c510af7e5..7ad28cd6069 100644
--- a/source/blender/editors/interface/view2d_ops.c
+++ b/source/blender/editors/interface/view2d_ops.c
@@ -341,162 +341,37 @@ static void VIEW2D_OT_pan(wmOperatorType *ot)
  * passes through.
  * \{ */
 
-/** Distance from the edge of the region within which to start panning. */
-#define EDGE_PAN_REGION_PAD (U.widget_unit)
-/** Speed factor in pixels per second per pixel of distance from edge pan zone beginning. */
-#define EDGE_PAN_SPEED_PER_PIXEL (25.0f * (float)U.dpi_fac)
-/** Delay before drag panning in seconds. */
-#define EDGE_PAN_DELAY 1.0f
-
 /* set up modal operator and relevant settings */
 static int view_edge_pan_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event))
 {
-  /* Set up customdata. */
-  view_pan_init(C, op);
-
-  v2dViewPanData *vpd = op->customdata;
-
-  vpd->edge_pan_start_time_x = 0.0;
-  vpd->edge_pan_start_time_y = 0.0;
-  vpd->edge_pan_last_time = PIL_check_seconds_timer();
+  op->customdata = MEM_callocN(sizeof(View2DEdgePanData), "View2DEdgePanData");
+  View2DEdgePanData *vpd = op->customdata;
+  UI_view2d_edge_pan_operator_init(C, vpd, op);
 
   WM_event_add_modal_handler(C, op);
 
   return (OPERATOR_RUNNING_MODAL | OPERATOR_PASS_THROUGH);
 }
 
-/**
- * Reset the edge pan timers if the mouse isn't in the scroll zone and
- * start the timers when the mouse enters a scroll zone.
- */
-static void edge_pan_manage_delay_timers(v2dViewPanData *vpd,
-                                         int pan_dir_x,
-                                         int pan_dir_y,
-                                         const double current_time)
-{
-  if (pan_dir_x == 0) {
-    vpd->edge_pan_start_time_x = 0.0;
-  }
-  else if (vpd->edge_pan_start_time_x == 0.0) {
-    vpd->edge_pan_start_time_x = current_time;
-  }
-  if (pan_dir_y == 0) {
-    vpd->edge_pan_start_time_y = 0.0;
-  }
-  else if (vpd->edge_pan_start_time_y == 0.0) {
-    vpd->edge_pan_start_time_y = current_time;
-  }
-}
-
-/**
- * Used to calculate a "fade in" factor for edge panning to make the interaction feel smooth
- * and more purposeful.
- *
- * \note Assumes a domain_min of 0.0f.
- */
-static float smootherstep(const float domain_max, float x)
-{
-  x = clamp_f(x / domain_max, 0.0, 1.0);
-  return x * x * x * (x * (x * 6.0 - 15.0) + 10.0);
-}
-
-static float edge_pan_speed(v2dViewPanData *vpd,
-                            int event_loc,
-                            bool x_dir,
-                            const double current_time)
-{
-  ARegion *region = vpd->region;
-
-  /* Find the distance from the start of the drag zone. */
-  const int min = (x_dir ? region->winrct.xmin : region->winrct.ymin) + EDGE_PAN_REGION_PAD;
-  const int max = (x_dir ? region->winrct.xmax : region->winrct.ymax) - EDGE_PAN_REGION_PAD;
-  int distance = 0.0;
-  if (event_loc > max) {
-    distance = event_loc - max;
-  }
-  else if (event_loc < min) {
-    distance = min - event_loc;
-  }
-  else {
-    BLI_assert(!"Calculating speed outside of pan zones");
-    return 0.0f;
-  }
-
-  /* Apply a fade in to the speed based on a start time delay. */
-  const double start_time = x_dir ? vpd->edge_pan_start_time_x : vpd->edge_pan_start_time_y;
-  const float delay_factor = smootherstep(EDGE_PAN_DELAY, (float)(current_time - start_time));
-
-  return distance * EDGE_PAN_SPEED_PER_PIXEL * delay_factor;
-}
-
 static int view_edge_pan_modal(bContext *C, wmOperator *op, const wmEvent *event)
 {
-  v2dViewPanData *vpd = op->customdata;
-  ARegion *region = vpd->region;
+  View2DEdgePanData *vpd = op->customdata;
 
   if (event->val == KM_RELEASE || event->type == EVT_ESCKEY) {
-    view_pan_exit(op);
+    MEM_SAFE_FREE(op->customdata);
     return (OPERATOR_FINISHED | OPERATOR_PASS_THROUGH);
   }
-  /* Only mousemove events matter here, ignore others. */
-  if (event->type != MOUSEMOVE) {
-    return OPERATOR_PASS_THROUGH;
-  }
+
+  UI_view2d_edge_pan_apply_event(C, vpd, event);
 
   /* This operator is supposed to run together with some drag action.
    * On successful handling, always pass events on to other handlers. */
-  const int success_retval = OPERATOR_PASS_THROUGH;
-
-  const int outside_padding = RNA_int_get(op->ptr, "outside_padding") * UI_UNIT_X;
-  rcti padding_rect;
-  if (outside_padding != 0) {
-    padding_rect = region->winrct;
-    BLI_rcti_pad(&padding_rect, outside_padding, outside_padding);
-  }
-
-  int pan_dir_x = 0;
-  int pan_dir_y = 0;
-  if ((outside_padding == 0) || BLI_rcti_isect_pt(&padding_rect, event->x, event->y)) {
-    /* Find whether the mouse is beyond X and Y edges. */
-    if (event->x > region->winrct.xmax - EDGE_PAN_REGION_PAD) {
-      pan_dir_x = 1;
-    }
-    else if (event->x < region->winrct.xmin + EDGE_PAN_REGION_PAD) {
-      pan_dir_x = -1;
-    }
-    if (event->y > region->winrct.ymax - EDGE_PAN_REGION_PAD) {
-      pan_dir_y = 1;
-    }
-    else if (event->y < region->winrct.ymin + EDGE_PAN_REGION_PAD) {
-      pan_dir_y = -1;
-    }
-  }
-
-  const double current_time = PIL_check_seconds_timer();
-  edge_pan_manage_delay_timers(vpd, pan_dir_x, pan_dir_y, current_time);
-
-  /* Calculate the delta since the last time the operator was called. */
-  const float dtime = (float)(current_time - vpd->edge_pan_last_time);
-  float dx = 0.0f, dy = 0.0f;
-  if (pan_dir_x != 0) {
-    const float speed = edge_pan_speed(vpd, event->x, true, current_time);
-    dx = dtime * speed * (float)pan_dir_x;
-  }
-  if (pan_dir_y != 0) {
-    const float speed = edge_pan_speed(vpd, event->y, false, current_time);
-    dy = dtime * speed * (float)pan_dir_y;
-  }
-  vpd->edge_pan_last_time = current_time;
-
-  /* Pan, clamping inside the regions's total bounds. */
-  view_pan_apply_ex(C, vpd, dx, dy);
-
-  return success_retval;
+  return OPERATOR_PASS_THROUGH;
 }
 
 static void view_edge_pan_cancel(bContext *UNUSED(C), wmOperator *op)
 {
-  view_pan_exit(op);
+  MEM_SAFE_FREE(op->customdata);
 }
 
 static void VIEW2D_OT_edge_pan(wmOperatorType *ot)
@@ -510,26 +385,13 @@ static void VIEW2D_OT_edge_pan(wmOperatorType *ot)
   ot->invoke = view_edge_pan_invoke;
   ot->modal = view_edge_pan_modal;
   ot->cancel = view_edge_pan_cancel;
-  ot->poll = view_pan_poll;
+  ot->poll = UI_view2d_edge_pan_poll;
 
   /* operator is modal */
   ot->flag = OPTYPE_INTERNAL;
-  RNA_def_int(ot->srna,
-              "outside_padding",
-              0,
-              0,
-              100,
-              "Outside Padding",
-              "Padding around the region in UI units within which panning is activated (0 to "
-              "disable boundary)",
-              0,
-              100);
+  UI_view2d_edge_pan_operator_properties(ot);
 }
 
-#undef EDGE_PAN_REGION_PAD
-#undef EDGE_PAN_SPEED_PER_PIXEL
-#undef EDGE_PAN_DELAY
-
 /** \} */
 
 /* -------------------------------------------------------------------- */
diff --git a/source/blender/editors/space_node/node_intern.h b/source/blender/editors/space_node/node_intern.h
index 2fcc59cde0b..8dfc43333e3 100644
--- a/source/blender/editors/space_node/node_intern.h
+++ b/source/blender/editors/space_node/node_intern.h
@@ -25,6 +25,7 @@
 
 #include "BKE_node.h"
 #include "UI_interface.h"
+#include "UI_view2d.h"
 #include <stddef.h> /* for size_t */
 
 /* internal exports only */
@@ -64,6 +65,9 @@ typedef struct bNodeLinkDrag {
   /** Temporarily stores the last hovered socket for multi-input socket operator.
    *  Store it to recalculate sorting after it is no longer hovered. */
   struct bNode *last_node_hovered_while_dragging_a_link;
+
+  /* Data for edge panning */
+  View2DEdgePanData pan_data;
 } bNodeLinkDrag;
 
 typedef struct SpaceNode_Runtime {
diff --git a/source/blender/editors/space_node/node_relationships.cc b/source/blender/editors/space_node/node_relationships.cc
index 57dc0b6fef2..a1b8e4e3395 100644
--- a/source/blender/editors/space_node/node_relationships.cc
+++ b/source/blender/editors/space_node/node_relationships.cc
@@ -973,6 +973,8 @@ static int node_link_modal(bContext *C, wmOperator *op, const wmEvent *event)
   ARegion *region = CTX_wm_region(C);
   float cursor[2];
 
+  UI_view2d_edge_pan_apply_event(C, &nldrag->pan_data, event);
+
   UI_view2d_region_to_view(&region->v2d, event->mval[0], event->mval[1], &cursor[0], &cursor[1]);
 
   switch (event->type) {
@@ -1130,6 +1132,8 @@ static int node_link_invoke(bContext *C, wmOperator *op, const wmEvent *event)
   bNodeLinkDrag *nldrag = node_link_init(bmain, snode, cursor, detach);
 
   if (nldrag) {
+    UI_view2d_edge_pan_operator_init(C, &nldrag->pan_data, op);
+
     op->customdata = nldrag;
     BLI_addtail(&snode->runtime->linkdrag, nldrag);
 
@@ -1193,6 +1197,13 @@ void NODE_OT_link(wmOperatorType *ot)
                       UI_PRECISION_FLOAT_MAX);
   RNA_def_property_flag(prop, PROP_HIDDEN);
   RNA_def_property_flag(prop, PROP_HIDDEN);
+
+  UI_view2d_edge_pan_operator_properties_ex(ot,
+                                            NODE_EDGE_PAN_INSIDE_PAD,
+                                            NODE_EDGE_PAN_OUTSIDE_PAD,
+                                            NODE_EDGE_PAN_SPEED_RAMP,
+                                            NODE_EDGE_PAN_MAX_SPEED,
+                                            NODE_EDGE_PAN_DELAY);
 }
 
 /** \} */
diff --git a/source/blender/editors/space_outliner/outliner_dragdrop.c b/source/blender/editors/space_outliner/outliner_dragdrop.c
index 7d889eed612..8021b45ac77 100644
--- a/source/blender/editors/space_outliner/outliner_dragdrop.c
+++ b/source/blender/editors/space_outliner/outliner_dragdrop.c
@@ -1365,7 +1365,7 @@ static int outliner_item_drag_drop_invoke(bContext *C,
     wmOperatorType *ot = WM_operatortype_find("VIEW2D_OT_edge_pan", true);
     PointerRNA op_ptr;
     WM_operator_properties_create_ptr(&op_ptr, ot);
-    RNA_int_set(&op_ptr, "outside_padding", OUTLINER_DRAG_SCOLL_OUTSIDE_PAD);
+    RNA_float_set(&op_ptr, "outside_padding", OUTLINER_DRAG_SCOLL_OUTSIDE_PAD);
     WM_operator_name_call_ptr(C, ot, WM_OP_INVOKE_DEFAULT, &op_ptr);
     WM_operator_properties_free(&op_ptr);
   }
diff --git a/source/blender/editors/transform/transform.h b/source/blender/editors/transform/transform.h
index f0ced665679..2b26ef3b3e4 100644
--- a/source/blender/editors/transform/transform.h
+++ b/source/blender/editors/transform/transform.h
@@ -149,6 +149,9 @@ typedef enum {
   T_AUTOMERGE = 1 << 20,
   /** Runs auto-merge & splits. */
   T_AUTOSPLIT = 1 << 21,
+
+  /** No cursor wrapping on region bounds */
+  T_NO_CURSOR_WRAP = 1 << 23,
 } eTFlag;
 
 /** #TransInfo.modifiers */
diff --git a/source/blender/editors/transform/transform_convert_node.c b/source/blender/editors/transform/transform_convert_node.c
index 12c4d0816ae..9d2d3713bf0 100644
--- a/source/blender/editors/transform/transform_convert_node.c
+++ b/source/blender/editors/transform/transform_convert_node.c
@@ -27,6 +27,7 @@
 
 #include "BLI_listbase.h"
 #include "BLI_math.h"
+#include "BLI_rect.h"
 
 #include "BKE_context.h"
 #include "BKE_node.h"
@@ -35,6 +36,7 @@
 #include "ED_node.h"
 
 #include "UI_interface.h"
+#include "UI_view2d.h"
 
 #include "transform.h"
 #include "transform_convert.h"
@@ -44,6 +46,12 @@
 /** \name Node Transform Creation
  * \{ */
 
+typedef struct NodeTransCustomData {
+  /* Initial rect of the view2d, used for computing offset during edge panning */
+  rctf initial_v2d_cur;
+  View2DEdgePanData edge_pan;
+} NodeTransCustomData;
+
 /* transcribe given node into TransData2D for Transforming */
 static void NodeToTransData(TransData *td, TransData2D *td2d, bNode *node, const float dpi_fac)
 {
@@ -107,6 +115,24 @@ void createTransNodeData(TransInfo *t)
   const float dpi_fac = UI_DPI_FAC;
   SpaceNode *snode = t->area->spacedata.first;
 
+  if (t->mode == TFM_TRANSLATION) {
+    /* Disable cursor wrapping in the node editor for edge pan */
+    t->flag |= T_NO_CURSOR_WRAP;
+  }
+
+  /* Custom data to enable edge panning during the node transform */
+  NodeTransCustomData *customdata = MEM_callocN(sizeof(*customdata), __func__);
+  UI_view2d_edge_pan_init(t->context,
+                          &customdata->edge_pan,
+                          NODE_EDGE_PAN_INSIDE_PAD,
+                          NODE_EDGE_PAN_OUTSIDE_PAD,
+                          NODE_EDGE_PAN_SPEED_RAMP,
+                          NODE_EDGE_PAN_MAX_SPEED,
+                          NODE_EDGE_PAN_DELAY);
+  customdata->initial_v2d_cur = t->region->v2d.cur;
+  t->custom.type.data = customdata;
+  t->custom.type.use_free = true;
+
   TransDataContainer *tc = TRANS_DATA_CONTAINER_FIRST_SINGLE(t);
 
   tc->data_len = 0;
@@ -150,6 +176,19 @@ void flushTransNodes(TransInfo *t)
 {
   const float dpi_fac = UI_DPI_FAC;
 
+  NodeTransCustomData *customdata = (NodeTransCustomData *)t->custom.type.data;
+
+  if (t->mode == TFM_TRANSLATION) {
+    /* Edge panning functions expect window coordinates, mval is relative to region */
+    const float x = t->region->winrct.xmin + t->mval[0];
+    const float y = t->region->winrct.ymin + t->mval[1];
+    UI_view2d_edge_pan_apply(t->context, &customdata->edge_pan, x, y);
+  }
+
+  /* Initial and current view2D rects for additional transform due to view panning and zooming */
+  const rctf *rect_src = &customdata->initial_v2d_cur;
+  const rctf *rect_dst = &t->region->v2d.cur;
+
   FOREACH_TRANS_DATA_CONTAINER (t, tc) {
     applyGridAbsolute(t);
 
@@ -159,23 +198,28 @@ void flushTransNodes(TransInfo *t)
       TransData2D *td2d = &tc->data_2d[i];
       bNode *node = td->extra;
 
-      /* weirdo - but the node system is a mix of free 2d elements and dpi sensitive UI */
+      float loc[2];
+      copy_v2_v2(loc, td2d->loc);
+
+      /* additional offset due to change in view2D rect */
+      BLI_rctf_transform_pt_v(rect_dst, rect_src, loc, loc);
+
 #ifdef USE_NODE_CENTER
-      float locx = (td2d->loc[0] - (BLI_rctf_size_x(&node->totr)) * +0.5f) / dpi_fac;
-      float locy = (td2d->loc[1] - (BLI_rctf_size_y(&node->totr)) * -0.5f) / dpi_fac;
-#else
-      float locx = td2d->loc[0] / dpi_fac;
-      float locy = td2d->loc[1] / dpi_fac;
+      loc[0] -= 0.5f * BLI_rctf_size_x(&node->totr);
+      loc[1] += 0.5f * BLI_rctf_size_y(&node->totr);
 #endif
 
+      /* weirdo - but the node system is a mix of free 2d elements and dpi sensitive UI */
+      loc[0] /= dpi_fac;
+      loc[1] /= dpi_fac;
+
       /* account for parents (nested nodes) */
       if (node->parent) {
-        nodeFromView(node->parent, locx, locy, &node->locx, &node->locy);
-      }
-      else {
-        node->locx = locx;
-        node->locy = locy;
+        nodeFromView(node->parent, loc[0], loc[1], &loc[0], &loc[1]);
       }
+
+      node->locx = loc[0];
+      node->locy = loc[1];
     }
 
     /* handle intersection with noodles */
diff --git a/source/blender/editors/transform/transform_ops.c b/source/blender/editors/transform/transform_ops.c
index 9b5f15a2574..d7bcf8dcf90 100644
--- a/source/blender/editors/transform/transform_ops.c
+++ b/source/blender/editors/transform/transform_ops.c
@@ -519,10 +519,11 @@ static int transform_invoke(bContext *C, wmOperator *op, const wmEvent *event)
   /* add temp handler */
   WM_event_add_modal_handler(C, op);
 
-  op->flag |= OP_IS_MODAL_GRAB_CURSOR; /* XXX maybe we want this with the gizmo only? */
-
   /* Use when modal input has some transformation to begin with. */
   TransInfo *t = op->customdata;
+  if ((t->flag & T_NO_CURSOR_WRAP) == 0) {
+    op->flag |= OP_IS_MODAL_GRAB_CURSOR; /* XXX maybe we want this with the gizmo only? */
+  }
   if (UNLIKELY(!is_zero_v4(t->values_modal_offset))) {
     transformApply(C, t);
   }