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authorHans Goudey <h.goudey@me.com>2022-04-03 08:00:42 +0300
committerHans Goudey <h.goudey@me.com>2022-04-03 08:00:42 +0300
commitbe699936af7b86ae542f7cc73caf56ab9de350d3 (patch)
treed1b0e622254daf1edcd946f428b6d3fc08f91014 /source/blender/editors/interface/view2d_ops.cc
parent79ff65d07bac0ecf0170542f86dc03a0228b53d5 (diff)
Cleanup: Move interface View2D files to C++
Similar to 4537eb0c3b1678a6235
Diffstat (limited to 'source/blender/editors/interface/view2d_ops.cc')
-rw-r--r--source/blender/editors/interface/view2d_ops.cc2274
1 files changed, 2274 insertions, 0 deletions
diff --git a/source/blender/editors/interface/view2d_ops.cc b/source/blender/editors/interface/view2d_ops.cc
new file mode 100644
index 00000000000..81c1cc79a0e
--- /dev/null
+++ b/source/blender/editors/interface/view2d_ops.cc
@@ -0,0 +1,2274 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later
+ * Copyright 2008 Blender Foundation. All rights reserved. */
+
+/** \file
+ * \ingroup edinterface
+ */
+
+#include <cmath>
+
+#include "MEM_guardedalloc.h"
+
+#include "DNA_userdef_types.h"
+#include "DNA_windowmanager_types.h"
+
+#include "BLI_blenlib.h"
+#include "BLI_math_base.h"
+#include "BLI_math_vector.h"
+#include "BLI_utildefines.h"
+
+#include "BKE_context.h"
+
+#include "RNA_access.h"
+#include "RNA_define.h"
+
+#include "WM_api.h"
+#include "WM_types.h"
+
+#include "ED_screen.h"
+
+#include "UI_interface.h"
+#include "UI_view2d.h"
+
+#include "PIL_time.h" /* USER_ZOOM_CONTINUE */
+
+/* -------------------------------------------------------------------- */
+/** \name Internal Utilities
+ * \{ */
+
+static bool view2d_poll(bContext *C)
+{
+ ARegion *region = CTX_wm_region(C);
+
+ return (region != nullptr) && (region->v2d.flag & V2D_IS_INIT);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Pan Shared Utilities
+ * \{ */
+
+/**
+ * This group of operators come in several forms:
+ * -# Modal 'dragging' with MMB - where movement of mouse dictates amount to pan view by
+ * -# Scroll-wheel 'steps' - rolling mouse-wheel by one step moves view by predefined amount
+ *
+ * In order to make sure this works, each operator must define the following RNA-Operator Props:
+ * - `deltax, deltay` - define how much to move view by (relative to zoom-correction factor)
+ */
+
+/**
+ * Temporary custom-data for operator.
+ */
+struct v2dViewPanData {
+ /** screen where view pan was initiated */
+ bScreen *screen;
+ /** area where view pan was initiated */
+ ScrArea *area;
+ /** region where view pan was initiated */
+ ARegion *region;
+ /** view2d we're operating in */
+ View2D *v2d;
+
+ /** amount to move view relative to zoom */
+ float facx, facy;
+
+ /* options for version 1 */
+ /** mouse x/y values in window when operator was initiated */
+ int startx, starty;
+ /** previous x/y values of mouse in window */
+ int lastx, lasty;
+ /** event starting pan, for modal exit */
+ int invoke_event;
+
+ /** for MMB in scrollers (old feature in past, but now not that useful) */
+ short in_scroller;
+
+ /* View2D Edge Panning */
+ double edge_pan_last_time;
+ double edge_pan_start_time_x, edge_pan_start_time_y;
+};
+
+static bool view_pan_poll(bContext *C)
+{
+ ARegion *region = CTX_wm_region(C);
+
+ /* check if there's a region in context to work with */
+ if (region == nullptr) {
+ 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;
+}
+
+/* initialize panning customdata */
+static void view_pan_init(bContext *C, wmOperator *op)
+{
+ /* Should've been checked before. */
+ BLI_assert(view_pan_poll(C));
+
+ /* set custom-data for operator */
+ v2dViewPanData *vpd = MEM_cnew<v2dViewPanData>(__func__);
+ op->customdata = vpd;
+
+ /* 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;
+
+ /* 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;
+
+ vpd->v2d->flag |= V2D_IS_NAVIGATING;
+}
+
+/* apply transform to view (i.e. adjust 'cur' rect) */
+static void view_pan_apply_ex(bContext *C, v2dViewPanData *vpd, float dx, float dy)
+{
+ View2D *v2d = vpd->v2d;
+
+ /* 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);
+}
+
+static void view_pan_apply(bContext *C, wmOperator *op)
+{
+ v2dViewPanData *vpd = static_cast<v2dViewPanData *>(op->customdata);
+
+ view_pan_apply_ex(C, vpd, RNA_int_get(op->ptr, "deltax"), RNA_int_get(op->ptr, "deltay"));
+}
+
+/* Cleanup temp custom-data. */
+static void view_pan_exit(wmOperator *op)
+{
+ v2dViewPanData *vpd = static_cast<v2dViewPanData *>(op->customdata);
+ vpd->v2d->flag &= ~V2D_IS_NAVIGATING;
+ MEM_SAFE_FREE(op->customdata);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Pan Operator (modal drag-pan)
+ * \{ */
+
+/* for 'redo' only, with no user input */
+static int view_pan_exec(bContext *C, wmOperator *op)
+{
+ view_pan_init(C, op);
+ view_pan_apply(C, op);
+ view_pan_exit(op);
+ return OPERATOR_FINISHED;
+}
+
+/* set up modal operator and relevant settings */
+static int view_pan_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+ wmWindow *window = CTX_wm_window(C);
+
+ /* set up customdata */
+ view_pan_init(C, op);
+
+ v2dViewPanData *vpd = static_cast<v2dViewPanData *>(op->customdata);
+ View2D *v2d = vpd->v2d;
+
+ /* set initial settings */
+ vpd->startx = vpd->lastx = event->xy[0];
+ vpd->starty = vpd->lasty = event->xy[1];
+ vpd->invoke_event = event->type;
+
+ if (event->type == MOUSEPAN) {
+ RNA_int_set(op->ptr, "deltax", event->prev_xy[0] - event->xy[0]);
+ RNA_int_set(op->ptr, "deltay", event->prev_xy[1] - event->xy[1]);
+
+ view_pan_apply(C, op);
+ view_pan_exit(op);
+ return OPERATOR_FINISHED;
+ }
+
+ RNA_int_set(op->ptr, "deltax", 0);
+ RNA_int_set(op->ptr, "deltay", 0);
+
+ if (v2d->keepofs & V2D_LOCKOFS_X) {
+ WM_cursor_modal_set(window, WM_CURSOR_NS_SCROLL);
+ }
+ else if (v2d->keepofs & V2D_LOCKOFS_Y) {
+ WM_cursor_modal_set(window, WM_CURSOR_EW_SCROLL);
+ }
+ else {
+ WM_cursor_modal_set(window, WM_CURSOR_NSEW_SCROLL);
+ }
+
+ /* add temp handler */
+ WM_event_add_modal_handler(C, op);
+
+ return OPERATOR_RUNNING_MODAL;
+}
+
+/* handle user input - calculations of mouse-movement
+ * need to be done here, not in the apply callback! */
+static int view_pan_modal(bContext *C, wmOperator *op, const wmEvent *event)
+{
+ v2dViewPanData *vpd = static_cast<v2dViewPanData *>(op->customdata);
+
+ /* execute the events */
+ switch (event->type) {
+ case MOUSEMOVE: {
+ /* calculate new delta transform, then store mouse-coordinates for next-time */
+ RNA_int_set(op->ptr, "deltax", (vpd->lastx - event->xy[0]));
+ RNA_int_set(op->ptr, "deltay", (vpd->lasty - event->xy[1]));
+
+ vpd->lastx = event->xy[0];
+ vpd->lasty = event->xy[1];
+
+ view_pan_apply(C, op);
+ break;
+ }
+ /* XXX: Mode switching isn't implemented. See comments in 36818.
+ * switch to zoom */
+#if 0
+ case LEFTMOUSE:
+ if (event->val == KM_PRESS) {
+ /* calculate overall delta mouse-movement for redo */
+ RNA_int_set(op->ptr, "deltax", (vpd->startx - vpd->lastx));
+ RNA_int_set(op->ptr, "deltay", (vpd->starty - vpd->lasty));
+
+ view_pan_exit(op);
+ WM_cursor_modal_restore(CTX_wm_window(C));
+ WM_operator_name_call(C, "VIEW2D_OT_zoom", WM_OP_INVOKE_DEFAULT, nullptr, event);
+ return OPERATOR_FINISHED;
+ }
+#endif
+ default:
+ if (ELEM(event->type, vpd->invoke_event, EVT_ESCKEY)) {
+ if (event->val == KM_RELEASE) {
+ /* calculate overall delta mouse-movement for redo */
+ RNA_int_set(op->ptr, "deltax", (vpd->startx - vpd->lastx));
+ RNA_int_set(op->ptr, "deltay", (vpd->starty - vpd->lasty));
+
+ view_pan_exit(op);
+ WM_cursor_modal_restore(CTX_wm_window(C));
+
+ return OPERATOR_FINISHED;
+ }
+ }
+ break;
+ }
+
+ return OPERATOR_RUNNING_MODAL;
+}
+
+static void view_pan_cancel(bContext *UNUSED(C), wmOperator *op)
+{
+ view_pan_exit(op);
+}
+
+static void VIEW2D_OT_pan(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "Pan View";
+ ot->description = "Pan the view";
+ ot->idname = "VIEW2D_OT_pan";
+
+ /* api callbacks */
+ ot->exec = view_pan_exec;
+ ot->invoke = view_pan_invoke;
+ ot->modal = view_pan_modal;
+ ot->cancel = view_pan_cancel;
+ ot->poll = view_pan_poll;
+
+ /* operator is modal */
+ ot->flag = OPTYPE_BLOCKING | OPTYPE_GRAB_CURSOR_XY;
+
+ /* rna - must keep these in sync with the other operators */
+ RNA_def_int(ot->srna, "deltax", 0, INT_MIN, INT_MAX, "Delta X", "", INT_MIN, INT_MAX);
+ RNA_def_int(ot->srna, "deltay", 0, INT_MIN, INT_MAX, "Delta Y", "", INT_MIN, INT_MAX);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Edge Pan Operator (modal)
+ *
+ * Scroll the region if the mouse is dragged to an edge. "Invisible" operator that always
+ * passes through.
+ * \{ */
+
+/* set up modal operator and relevant settings */
+static int view_edge_pan_invoke(bContext *C, wmOperator *op, const wmEvent *UNUSED(event))
+{
+ op->customdata = MEM_callocN(sizeof(View2DEdgePanData), "View2DEdgePanData");
+ View2DEdgePanData *vpd = static_cast<View2DEdgePanData *>(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);
+}
+
+static int view_edge_pan_modal(bContext *C, wmOperator *op, const wmEvent *event)
+{
+ View2DEdgePanData *vpd = static_cast<View2DEdgePanData *>(op->customdata);
+
+ if (event->val == KM_RELEASE || event->type == EVT_ESCKEY) {
+ vpd->v2d->flag &= ~V2D_IS_NAVIGATING;
+ MEM_SAFE_FREE(op->customdata);
+ return (OPERATOR_FINISHED | 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. */
+ return OPERATOR_PASS_THROUGH;
+}
+
+static void view_edge_pan_cancel(bContext *UNUSED(C), wmOperator *op)
+{
+ v2dViewPanData *vpd = static_cast<v2dViewPanData *>(op->customdata);
+ vpd->v2d->flag &= ~V2D_IS_NAVIGATING;
+ MEM_SAFE_FREE(op->customdata);
+}
+
+static void VIEW2D_OT_edge_pan(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "View Edge Pan";
+ ot->description = "Pan the view when the mouse is held at an edge";
+ ot->idname = "VIEW2D_OT_edge_pan";
+
+ /* api callbacks */
+ ot->invoke = view_edge_pan_invoke;
+ ot->modal = view_edge_pan_modal;
+ ot->cancel = view_edge_pan_cancel;
+ ot->poll = UI_view2d_edge_pan_poll;
+
+ /* operator is modal */
+ ot->flag = OPTYPE_INTERNAL;
+ UI_view2d_edge_pan_operator_properties(ot);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Pan Operator (single step)
+ * \{ */
+
+/* this operator only needs this single callback, where it calls the view_pan_*() methods */
+static int view_scrollright_exec(bContext *C, wmOperator *op)
+{
+ /* initialize default settings (and validate if ok to run) */
+ view_pan_init(C, op);
+
+ /* also, check if can pan in horizontal axis */
+ v2dViewPanData *vpd = static_cast<v2dViewPanData *>(op->customdata);
+ if (vpd->v2d->keepofs & V2D_LOCKOFS_X) {
+ view_pan_exit(op);
+ return OPERATOR_PASS_THROUGH;
+ }
+
+ /* set RNA-Props - only movement in positive x-direction */
+ RNA_int_set(op->ptr, "deltax", 40);
+ RNA_int_set(op->ptr, "deltay", 0);
+
+ /* apply movement, then we're done */
+ view_pan_apply(C, op);
+ view_pan_exit(op);
+
+ return OPERATOR_FINISHED;
+}
+
+static void VIEW2D_OT_scroll_right(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "Scroll Right";
+ ot->description = "Scroll the view right";
+ ot->idname = "VIEW2D_OT_scroll_right";
+
+ /* api callbacks */
+ ot->exec = view_scrollright_exec;
+ ot->poll = view_pan_poll;
+
+ /* rna - must keep these in sync with the other operators */
+ RNA_def_int(ot->srna, "deltax", 0, INT_MIN, INT_MAX, "Delta X", "", INT_MIN, INT_MAX);
+ RNA_def_int(ot->srna, "deltay", 0, INT_MIN, INT_MAX, "Delta Y", "", INT_MIN, INT_MAX);
+}
+
+/* this operator only needs this single callback, where it calls the view_pan_*() methods */
+static int view_scrollleft_exec(bContext *C, wmOperator *op)
+{
+ /* initialize default settings (and validate if ok to run) */
+ view_pan_init(C, op);
+
+ /* also, check if can pan in horizontal axis */
+ v2dViewPanData *vpd = static_cast<v2dViewPanData *>(op->customdata);
+ if (vpd->v2d->keepofs & V2D_LOCKOFS_X) {
+ view_pan_exit(op);
+ return OPERATOR_PASS_THROUGH;
+ }
+
+ /* set RNA-Props - only movement in negative x-direction */
+ RNA_int_set(op->ptr, "deltax", -40);
+ RNA_int_set(op->ptr, "deltay", 0);
+
+ /* apply movement, then we're done */
+ view_pan_apply(C, op);
+ view_pan_exit(op);
+
+ return OPERATOR_FINISHED;
+}
+
+static void VIEW2D_OT_scroll_left(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "Scroll Left";
+ ot->description = "Scroll the view left";
+ ot->idname = "VIEW2D_OT_scroll_left";
+
+ /* api callbacks */
+ ot->exec = view_scrollleft_exec;
+ ot->poll = view_pan_poll;
+
+ /* rna - must keep these in sync with the other operators */
+ RNA_def_int(ot->srna, "deltax", 0, INT_MIN, INT_MAX, "Delta X", "", INT_MIN, INT_MAX);
+ RNA_def_int(ot->srna, "deltay", 0, INT_MIN, INT_MAX, "Delta Y", "", INT_MIN, INT_MAX);
+}
+
+/* this operator only needs this single callback, where it calls the view_pan_*() methods */
+static int view_scrolldown_exec(bContext *C, wmOperator *op)
+{
+ /* initialize default settings (and validate if ok to run) */
+ view_pan_init(C, op);
+
+ /* also, check if can pan in vertical axis */
+ v2dViewPanData *vpd = static_cast<v2dViewPanData *>(op->customdata);
+ if (vpd->v2d->keepofs & V2D_LOCKOFS_Y) {
+ view_pan_exit(op);
+ return OPERATOR_PASS_THROUGH;
+ }
+
+ /* set RNA-Props */
+ RNA_int_set(op->ptr, "deltax", 0);
+ RNA_int_set(op->ptr, "deltay", -40);
+
+ PropertyRNA *prop = RNA_struct_find_property(op->ptr, "page");
+ if (RNA_property_is_set(op->ptr, prop) && RNA_property_boolean_get(op->ptr, prop)) {
+ ARegion *region = CTX_wm_region(C);
+ RNA_int_set(op->ptr, "deltay", region->v2d.mask.ymin - region->v2d.mask.ymax);
+ }
+
+ /* apply movement, then we're done */
+ view_pan_apply(C, op);
+ view_pan_exit(op);
+
+ return OPERATOR_FINISHED;
+}
+
+static void VIEW2D_OT_scroll_down(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "Scroll Down";
+ ot->description = "Scroll the view down";
+ ot->idname = "VIEW2D_OT_scroll_down";
+
+ /* api callbacks */
+ ot->exec = view_scrolldown_exec;
+ ot->poll = view_pan_poll;
+
+ /* rna - must keep these in sync with the other operators */
+ RNA_def_int(ot->srna, "deltax", 0, INT_MIN, INT_MAX, "Delta X", "", INT_MIN, INT_MAX);
+ RNA_def_int(ot->srna, "deltay", 0, INT_MIN, INT_MAX, "Delta Y", "", INT_MIN, INT_MAX);
+ RNA_def_boolean(ot->srna, "page", false, "Page", "Scroll down one page");
+}
+
+/* this operator only needs this single callback, where it calls the view_pan_*() methods */
+static int view_scrollup_exec(bContext *C, wmOperator *op)
+{
+ /* initialize default settings (and validate if ok to run) */
+ view_pan_init(C, op);
+
+ /* also, check if can pan in vertical axis */
+ v2dViewPanData *vpd = static_cast<v2dViewPanData *>(op->customdata);
+ if (vpd->v2d->keepofs & V2D_LOCKOFS_Y) {
+ view_pan_exit(op);
+ return OPERATOR_PASS_THROUGH;
+ }
+
+ /* set RNA-Props */
+ RNA_int_set(op->ptr, "deltax", 0);
+ RNA_int_set(op->ptr, "deltay", 40);
+
+ PropertyRNA *prop = RNA_struct_find_property(op->ptr, "page");
+ if (RNA_property_is_set(op->ptr, prop) && RNA_property_boolean_get(op->ptr, prop)) {
+ ARegion *region = CTX_wm_region(C);
+ RNA_int_set(op->ptr, "deltay", BLI_rcti_size_y(&region->v2d.mask));
+ }
+
+ /* apply movement, then we're done */
+ view_pan_apply(C, op);
+ view_pan_exit(op);
+
+ return OPERATOR_FINISHED;
+}
+
+static void VIEW2D_OT_scroll_up(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "Scroll Up";
+ ot->description = "Scroll the view up";
+ ot->idname = "VIEW2D_OT_scroll_up";
+
+ /* api callbacks */
+ ot->exec = view_scrollup_exec;
+ ot->poll = view_pan_poll;
+
+ /* rna - must keep these in sync with the other operators */
+ RNA_def_int(ot->srna, "deltax", 0, INT_MIN, INT_MAX, "Delta X", "", INT_MIN, INT_MAX);
+ RNA_def_int(ot->srna, "deltay", 0, INT_MIN, INT_MAX, "Delta Y", "", INT_MIN, INT_MAX);
+ RNA_def_boolean(ot->srna, "page", false, "Page", "Scroll up one page");
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Zoom Shared Utilities
+ * \{ */
+
+/**
+ * This group of operators come in several forms:
+ * -# Scroll-wheel 'steps' - rolling mouse-wheel by one step zooms view by predefined amount.
+ * -# Scroll-wheel 'steps' + alt + ctrl/shift - zooms view on one axis only (ctrl=x, shift=y).
+ * XXX this could be implemented...
+ * -# Pad +/- Keys - pressing each key moves the zooms the view by a predefined amount.
+ *
+ * In order to make sure this works, each operator must define the following RNA-Operator Props:
+ *
+ * - zoomfacx, zoomfacy - These two zoom factors allow for non-uniform scaling.
+ * It is safe to scale by 0, as these factors are used to determine.
+ * amount to enlarge 'cur' by.
+ */
+
+/**
+ * Temporary custom-data for operator.
+ */
+struct v2dViewZoomData {
+ View2D *v2d; /* view2d we're operating in */
+ ARegion *region;
+
+ /* needed for continuous zoom */
+ wmTimer *timer;
+ double timer_lastdraw;
+
+ int lastx, lasty; /* previous x/y values of mouse in window */
+ int invoke_event; /* event type that invoked, for modal exits */
+ float dx, dy; /* running tally of previous delta values (for obtaining final zoom) */
+ float mx_2d, my_2d; /* initial mouse location in v2d coords */
+ bool zoom_to_mouse_pos;
+};
+
+/**
+ * Clamp by convention rather than locking flags,
+ * for ndof and +/- keys
+ */
+static void view_zoom_axis_lock_defaults(bContext *C, bool r_do_zoom_xy[2])
+{
+ ScrArea *area = CTX_wm_area(C);
+
+ r_do_zoom_xy[0] = true;
+ r_do_zoom_xy[1] = true;
+
+ /* default not to zoom the sequencer vertically */
+ if (area && area->spacetype == SPACE_SEQ) {
+ ARegion *region = CTX_wm_region(C);
+
+ if (region && region->regiontype == RGN_TYPE_WINDOW) {
+ r_do_zoom_xy[1] = false;
+ }
+ }
+}
+
+/* check if step-zoom can be applied */
+static bool view_zoom_poll(bContext *C)
+{
+ ARegion *region = CTX_wm_region(C);
+
+ /* check if there's a region in context to work with */
+ if (region == nullptr) {
+ return false;
+ }
+
+ /* Do not show that in 3DView context. */
+ if (CTX_wm_region_view3d(C)) {
+ return false;
+ }
+
+ View2D *v2d = &region->v2d;
+
+ /* check that 2d-view is zoomable */
+ if ((v2d->keepzoom & V2D_LOCKZOOM_X) && (v2d->keepzoom & V2D_LOCKZOOM_Y)) {
+ return false;
+ }
+
+ /* view is zoomable */
+ return true;
+}
+
+/* initialize panning customdata */
+static void view_zoomdrag_init(bContext *C, wmOperator *op)
+{
+ /* Should've been checked before. */
+ BLI_assert(view_zoom_poll(C));
+
+ /* set custom-data for operator */
+ v2dViewZoomData *vzd = MEM_cnew<v2dViewZoomData>(__func__);
+ op->customdata = vzd;
+
+ /* set pointers to owners */
+ vzd->region = CTX_wm_region(C);
+ vzd->v2d = &vzd->region->v2d;
+ /* False by default. Interactive callbacks (ie invoke()) can set it to true. */
+ vzd->zoom_to_mouse_pos = false;
+
+ vzd->v2d->flag |= V2D_IS_NAVIGATING;
+}
+
+/* apply transform to view (i.e. adjust 'cur' rect) */
+static void view_zoomstep_apply_ex(bContext *C,
+ v2dViewZoomData *vzd,
+ const float facx,
+ const float facy)
+{
+ ARegion *region = CTX_wm_region(C);
+ View2D *v2d = &region->v2d;
+ const rctf cur_old = v2d->cur;
+ const int snap_test = ED_region_snap_size_test(region);
+
+ /* calculate amount to move view by, ensuring symmetry so the
+ * old zoom level is restored after zooming back the same amount
+ */
+ float dx, dy;
+ if (facx >= 0.0f) {
+ dx = BLI_rctf_size_x(&v2d->cur) * facx;
+ dy = BLI_rctf_size_y(&v2d->cur) * facy;
+ }
+ else {
+ dx = (BLI_rctf_size_x(&v2d->cur) / (1.0f + 2.0f * facx)) * facx;
+ dy = (BLI_rctf_size_y(&v2d->cur) / (1.0f + 2.0f * facy)) * facy;
+ }
+
+ /* only resize view on an axis if change is allowed */
+ if ((v2d->keepzoom & V2D_LOCKZOOM_X) == 0) {
+ if (v2d->keepofs & V2D_LOCKOFS_X) {
+ v2d->cur.xmax -= 2 * dx;
+ }
+ else if (v2d->keepofs & V2D_KEEPOFS_X) {
+ if (v2d->align & V2D_ALIGN_NO_POS_X) {
+ v2d->cur.xmin += 2 * dx;
+ }
+ else {
+ v2d->cur.xmax -= 2 * dx;
+ }
+ }
+ else {
+
+ v2d->cur.xmin += dx;
+ v2d->cur.xmax -= dx;
+
+ if (vzd->zoom_to_mouse_pos) {
+ /* get zoom fac the same way as in
+ * ui_view2d_curRect_validate_resize - better keep in sync! */
+ const float zoomx = (float)(BLI_rcti_size_x(&v2d->mask) + 1) / BLI_rctf_size_x(&v2d->cur);
+
+ /* only move view to mouse if zoom fac is inside minzoom/maxzoom */
+ if (((v2d->keepzoom & V2D_LIMITZOOM) == 0) ||
+ IN_RANGE_INCL(zoomx, v2d->minzoom, v2d->maxzoom)) {
+ const float mval_fac = (vzd->mx_2d - cur_old.xmin) / BLI_rctf_size_x(&cur_old);
+ const float mval_faci = 1.0f - mval_fac;
+ const float ofs = (mval_fac * dx) - (mval_faci * dx);
+
+ v2d->cur.xmin += ofs;
+ v2d->cur.xmax += ofs;
+ }
+ }
+ }
+ }
+ if ((v2d->keepzoom & V2D_LOCKZOOM_Y) == 0) {
+ if (v2d->keepofs & V2D_LOCKOFS_Y) {
+ v2d->cur.ymax -= 2 * dy;
+ }
+ else if (v2d->keepofs & V2D_KEEPOFS_Y) {
+ if (v2d->align & V2D_ALIGN_NO_POS_Y) {
+ v2d->cur.ymin += 2 * dy;
+ }
+ else {
+ v2d->cur.ymax -= 2 * dy;
+ }
+ }
+ else {
+
+ v2d->cur.ymin += dy;
+ v2d->cur.ymax -= dy;
+
+ if (vzd->zoom_to_mouse_pos) {
+ /* get zoom fac the same way as in
+ * ui_view2d_curRect_validate_resize - better keep in sync! */
+ const float zoomy = (float)(BLI_rcti_size_y(&v2d->mask) + 1) / BLI_rctf_size_y(&v2d->cur);
+
+ /* only move view to mouse if zoom fac is inside minzoom/maxzoom */
+ if (((v2d->keepzoom & V2D_LIMITZOOM) == 0) ||
+ IN_RANGE_INCL(zoomy, v2d->minzoom, v2d->maxzoom)) {
+ const float mval_fac = (vzd->my_2d - cur_old.ymin) / BLI_rctf_size_y(&cur_old);
+ const float mval_faci = 1.0f - mval_fac;
+ const float ofs = (mval_fac * dy) - (mval_faci * dy);
+
+ v2d->cur.ymin += ofs;
+ v2d->cur.ymax += ofs;
+ }
+ }
+ }
+ }
+
+ /* Inform v2d about changes after this operation. */
+ UI_view2d_curRect_changed(C, v2d);
+
+ if (ED_region_snap_size_apply(region, snap_test)) {
+ ScrArea *area = CTX_wm_area(C);
+ ED_area_tag_redraw(area);
+ WM_event_add_notifier(C, NC_SCREEN | NA_EDITED, nullptr);
+ }
+
+ /* request updates to be done... */
+ ED_region_tag_redraw_no_rebuild(vzd->region);
+ UI_view2d_sync(CTX_wm_screen(C), CTX_wm_area(C), v2d, V2D_LOCK_COPY);
+}
+
+static void view_zoomstep_apply(bContext *C, wmOperator *op)
+{
+ v2dViewZoomData *vzd = static_cast<v2dViewZoomData *>(op->customdata);
+ view_zoomstep_apply_ex(
+ C, vzd, RNA_float_get(op->ptr, "zoomfacx"), RNA_float_get(op->ptr, "zoomfacy"));
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Zoom Operator (single step)
+ * \{ */
+
+/* Cleanup temp custom-data. */
+static void view_zoomstep_exit(wmOperator *op)
+{
+ UI_view2d_zoom_cache_reset();
+ v2dViewZoomData *vzd = static_cast<v2dViewZoomData *>(op->customdata);
+ vzd->v2d->flag &= ~V2D_IS_NAVIGATING;
+ MEM_SAFE_FREE(op->customdata);
+}
+
+/* this operator only needs this single callback, where it calls the view_zoom_*() methods */
+static int view_zoomin_exec(bContext *C, wmOperator *op)
+{
+ if (op->customdata == nullptr) { /* Might have been setup in _invoke() already. */
+ view_zoomdrag_init(C, op);
+ }
+
+ bool do_zoom_xy[2];
+ view_zoom_axis_lock_defaults(C, do_zoom_xy);
+
+ /* set RNA-Props - zooming in by uniform factor */
+ RNA_float_set(op->ptr, "zoomfacx", do_zoom_xy[0] ? 0.0375f : 0.0f);
+ RNA_float_set(op->ptr, "zoomfacy", do_zoom_xy[1] ? 0.0375f : 0.0f);
+
+ /* apply movement, then we're done */
+ view_zoomstep_apply(C, op);
+
+ view_zoomstep_exit(op);
+
+ return OPERATOR_FINISHED;
+}
+
+static int view_zoomin_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+ view_zoomdrag_init(C, op);
+
+ v2dViewZoomData *vzd = static_cast<v2dViewZoomData *>(op->customdata);
+
+ if (U.uiflag & USER_ZOOM_TO_MOUSEPOS) {
+ ARegion *region = CTX_wm_region(C);
+
+ /* store initial mouse position (in view space) */
+ UI_view2d_region_to_view(
+ &region->v2d, event->mval[0], event->mval[1], &vzd->mx_2d, &vzd->my_2d);
+ vzd->zoom_to_mouse_pos = true;
+ }
+
+ return view_zoomin_exec(C, op);
+}
+
+static void VIEW2D_OT_zoom_in(wmOperatorType *ot)
+{
+ PropertyRNA *prop;
+
+ /* identifiers */
+ ot->name = "Zoom In";
+ ot->description = "Zoom in the view";
+ ot->idname = "VIEW2D_OT_zoom_in";
+
+ /* api callbacks */
+ ot->invoke = view_zoomin_invoke;
+ ot->exec = view_zoomin_exec;
+ ot->poll = view_zoom_poll;
+
+ /* rna - must keep these in sync with the other operators */
+ prop = RNA_def_float(
+ ot->srna, "zoomfacx", 0, -FLT_MAX, FLT_MAX, "Zoom Factor X", "", -FLT_MAX, FLT_MAX);
+ RNA_def_property_flag(prop, PROP_HIDDEN);
+ prop = RNA_def_float(
+ ot->srna, "zoomfacy", 0, -FLT_MAX, FLT_MAX, "Zoom Factor Y", "", -FLT_MAX, FLT_MAX);
+ RNA_def_property_flag(prop, PROP_HIDDEN);
+}
+
+/* this operator only needs this single callback, where it calls the view_zoom_*() methods */
+static int view_zoomout_exec(bContext *C, wmOperator *op)
+{
+ bool do_zoom_xy[2];
+
+ if (op->customdata == nullptr) { /* Might have been setup in _invoke() already. */
+ view_zoomdrag_init(C, op);
+ }
+
+ view_zoom_axis_lock_defaults(C, do_zoom_xy);
+
+ /* set RNA-Props - zooming in by uniform factor */
+ RNA_float_set(op->ptr, "zoomfacx", do_zoom_xy[0] ? -0.0375f : 0.0f);
+ RNA_float_set(op->ptr, "zoomfacy", do_zoom_xy[1] ? -0.0375f : 0.0f);
+
+ /* apply movement, then we're done */
+ view_zoomstep_apply(C, op);
+
+ view_zoomstep_exit(op);
+
+ return OPERATOR_FINISHED;
+}
+
+static int view_zoomout_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+ view_zoomdrag_init(C, op);
+
+ v2dViewZoomData *vzd = static_cast<v2dViewZoomData *>(op->customdata);
+
+ if (U.uiflag & USER_ZOOM_TO_MOUSEPOS) {
+ ARegion *region = CTX_wm_region(C);
+
+ /* store initial mouse position (in view space) */
+ UI_view2d_region_to_view(
+ &region->v2d, event->mval[0], event->mval[1], &vzd->mx_2d, &vzd->my_2d);
+ vzd->zoom_to_mouse_pos = true;
+ }
+
+ return view_zoomout_exec(C, op);
+}
+
+static void VIEW2D_OT_zoom_out(wmOperatorType *ot)
+{
+ PropertyRNA *prop;
+
+ /* identifiers */
+ ot->name = "Zoom Out";
+ ot->description = "Zoom out the view";
+ ot->idname = "VIEW2D_OT_zoom_out";
+
+ /* api callbacks */
+ ot->invoke = view_zoomout_invoke;
+ ot->exec = view_zoomout_exec;
+
+ ot->poll = view_zoom_poll;
+
+ /* rna - must keep these in sync with the other operators */
+ prop = RNA_def_float(
+ ot->srna, "zoomfacx", 0, -FLT_MAX, FLT_MAX, "Zoom Factor X", "", -FLT_MAX, FLT_MAX);
+ RNA_def_property_flag(prop, PROP_HIDDEN);
+ prop = RNA_def_float(
+ ot->srna, "zoomfacy", 0, -FLT_MAX, FLT_MAX, "Zoom Factor Y", "", -FLT_MAX, FLT_MAX);
+ RNA_def_property_flag(prop, PROP_HIDDEN);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Zoom Operator (modal drag-zoom)
+ * \{ */
+
+/**
+ * MMB Drag - allows non-uniform scaling by dragging mouse
+ *
+ * In order to make sure this works, each operator must define the following RNA-Operator Props:
+ * - `deltax, deltay` - amounts to add to each side of the 'cur' rect
+ */
+
+/* apply transform to view (i.e. adjust 'cur' rect) */
+static void view_zoomdrag_apply(bContext *C, wmOperator *op)
+{
+ v2dViewZoomData *vzd = static_cast<v2dViewZoomData *>(op->customdata);
+ View2D *v2d = vzd->v2d;
+ const int snap_test = ED_region_snap_size_test(vzd->region);
+
+ const bool use_cursor_init = RNA_boolean_get(op->ptr, "use_cursor_init");
+ const bool zoom_to_pos = use_cursor_init && vzd->zoom_to_mouse_pos;
+
+ /* get amount to move view by */
+ float dx = RNA_float_get(op->ptr, "deltax") / U.dpi_fac;
+ float dy = RNA_float_get(op->ptr, "deltay") / U.dpi_fac;
+
+ /* Check if the 'timer' is initialized, as zooming with the trackpad
+ * never uses the "Continuous" zoom method, and the 'timer' is not initialized. */
+ if ((U.viewzoom == USER_ZOOM_CONTINUE) && vzd->timer) { /* XXX store this setting as RNA prop? */
+ const double time = PIL_check_seconds_timer();
+ const float time_step = (float)(time - vzd->timer_lastdraw);
+
+ dx *= time_step * 0.5f;
+ dy *= time_step * 0.5f;
+
+ vzd->timer_lastdraw = time;
+ }
+
+ /* only move view on an axis if change is allowed */
+ if ((v2d->keepzoom & V2D_LOCKZOOM_X) == 0) {
+ if (v2d->keepofs & V2D_LOCKOFS_X) {
+ v2d->cur.xmax -= 2 * dx;
+ }
+ else {
+ if (zoom_to_pos) {
+ const float mval_fac = (vzd->mx_2d - v2d->cur.xmin) / BLI_rctf_size_x(&v2d->cur);
+ const float mval_faci = 1.0f - mval_fac;
+ const float ofs = (mval_fac * dx) - (mval_faci * dx);
+
+ v2d->cur.xmin += ofs + dx;
+ v2d->cur.xmax += ofs - dx;
+ }
+ else {
+ v2d->cur.xmin += dx;
+ v2d->cur.xmax -= dx;
+ }
+ }
+ }
+ if ((v2d->keepzoom & V2D_LOCKZOOM_Y) == 0) {
+ if (v2d->keepofs & V2D_LOCKOFS_Y) {
+ v2d->cur.ymax -= 2 * dy;
+ }
+ else {
+ if (zoom_to_pos) {
+ const float mval_fac = (vzd->my_2d - v2d->cur.ymin) / BLI_rctf_size_y(&v2d->cur);
+ const float mval_faci = 1.0f - mval_fac;
+ const float ofs = (mval_fac * dy) - (mval_faci * dy);
+
+ v2d->cur.ymin += ofs + dy;
+ v2d->cur.ymax += ofs - dy;
+ }
+ else {
+ v2d->cur.ymin += dy;
+ v2d->cur.ymax -= dy;
+ }
+ }
+ }
+
+ /* Inform v2d about changes after this operation. */
+ UI_view2d_curRect_changed(C, v2d);
+
+ if (ED_region_snap_size_apply(vzd->region, snap_test)) {
+ ScrArea *area = CTX_wm_area(C);
+ ED_area_tag_redraw(area);
+ WM_event_add_notifier(C, NC_SCREEN | NA_EDITED, nullptr);
+ }
+
+ /* request updates to be done... */
+ ED_region_tag_redraw_no_rebuild(vzd->region);
+ UI_view2d_sync(CTX_wm_screen(C), CTX_wm_area(C), v2d, V2D_LOCK_COPY);
+}
+
+/* Cleanup temp custom-data. */
+static void view_zoomdrag_exit(bContext *C, wmOperator *op)
+{
+ UI_view2d_zoom_cache_reset();
+
+ if (op->customdata) {
+ v2dViewZoomData *vzd = static_cast<v2dViewZoomData *>(op->customdata);
+ vzd->v2d->flag &= ~V2D_IS_NAVIGATING;
+
+ if (vzd->timer) {
+ WM_event_remove_timer(CTX_wm_manager(C), CTX_wm_window(C), vzd->timer);
+ }
+
+ MEM_freeN(op->customdata);
+ op->customdata = nullptr;
+ }
+}
+
+static void view_zoomdrag_cancel(bContext *C, wmOperator *op)
+{
+ view_zoomdrag_exit(C, op);
+}
+
+/* for 'redo' only, with no user input */
+static int view_zoomdrag_exec(bContext *C, wmOperator *op)
+{
+ view_zoomdrag_init(C, op);
+ view_zoomdrag_apply(C, op);
+ view_zoomdrag_exit(C, op);
+ return OPERATOR_FINISHED;
+}
+
+/* set up modal operator and relevant settings */
+static int view_zoomdrag_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+ wmWindow *window = CTX_wm_window(C);
+
+ /* set up customdata */
+ view_zoomdrag_init(C, op);
+
+ v2dViewZoomData *vzd = static_cast<v2dViewZoomData *>(op->customdata);
+ View2D *v2d = vzd->v2d;
+
+ if (U.uiflag & USER_ZOOM_TO_MOUSEPOS) {
+ ARegion *region = CTX_wm_region(C);
+
+ /* Store initial mouse position (in view space). */
+ UI_view2d_region_to_view(
+ &region->v2d, event->mval[0], event->mval[1], &vzd->mx_2d, &vzd->my_2d);
+ vzd->zoom_to_mouse_pos = true;
+ }
+
+ if (ELEM(event->type, MOUSEZOOM, MOUSEPAN)) {
+ vzd->lastx = event->prev_xy[0];
+ vzd->lasty = event->prev_xy[1];
+
+ float facx, facy;
+ float zoomfac = 0.01f;
+
+ /* Some view2d's (graph) don't have min/max zoom, or extreme ones. */
+ if (v2d->maxzoom > 0.0f) {
+ zoomfac = clamp_f(0.001f * v2d->maxzoom, 0.001f, 0.01f);
+ }
+
+ if (event->type == MOUSEPAN) {
+ facx = zoomfac * WM_event_absolute_delta_x(event);
+ facy = zoomfac * WM_event_absolute_delta_y(event);
+
+ if (U.uiflag & USER_ZOOM_INVERT) {
+ facx *= -1.0f;
+ facy *= -1.0f;
+ }
+ }
+ else { /* MOUSEZOOM */
+ facx = facy = zoomfac * WM_event_absolute_delta_x(event);
+ }
+
+ /* Only respect user setting zoom axis if the view does not have any zoom restrictions
+ * any will be scaled uniformly. */
+ if (((v2d->keepzoom & (V2D_LOCKZOOM_X | V2D_LOCKZOOM_Y)) == 0) &&
+ (v2d->keepzoom & V2D_KEEPASPECT)) {
+ if (U.uiflag & USER_ZOOM_HORIZ) {
+ facy = 0.0f;
+ }
+ else {
+ facx = 0.0f;
+ }
+ }
+
+ /* support trackpad zoom to always zoom entirely - the v2d code uses portrait or
+ * landscape exceptions */
+ if (v2d->keepzoom & V2D_KEEPASPECT) {
+ if (fabsf(facx) > fabsf(facy)) {
+ facy = facx;
+ }
+ else {
+ facx = facy;
+ }
+ }
+
+ const float dx = facx * BLI_rctf_size_x(&v2d->cur);
+ const float dy = facy * BLI_rctf_size_y(&v2d->cur);
+
+ RNA_float_set(op->ptr, "deltax", dx);
+ RNA_float_set(op->ptr, "deltay", dy);
+
+ view_zoomdrag_apply(C, op);
+ view_zoomdrag_exit(C, op);
+ return OPERATOR_FINISHED;
+ }
+
+ /* set initial settings */
+ vzd->lastx = event->xy[0];
+ vzd->lasty = event->xy[1];
+ RNA_float_set(op->ptr, "deltax", 0);
+ RNA_float_set(op->ptr, "deltay", 0);
+
+ /* for modal exit test */
+ vzd->invoke_event = event->type;
+
+ if (v2d->keepofs & V2D_LOCKOFS_X) {
+ WM_cursor_modal_set(window, WM_CURSOR_NS_SCROLL);
+ }
+ else if (v2d->keepofs & V2D_LOCKOFS_Y) {
+ WM_cursor_modal_set(window, WM_CURSOR_EW_SCROLL);
+ }
+ else {
+ WM_cursor_modal_set(window, WM_CURSOR_NSEW_SCROLL);
+ }
+
+ /* add temp handler */
+ WM_event_add_modal_handler(C, op);
+
+ if (U.viewzoom == USER_ZOOM_CONTINUE) {
+ /* needs a timer to continue redrawing */
+ vzd->timer = WM_event_add_timer(CTX_wm_manager(C), window, TIMER, 0.01f);
+ vzd->timer_lastdraw = PIL_check_seconds_timer();
+ }
+
+ return OPERATOR_RUNNING_MODAL;
+}
+
+/* handle user input - calculations of mouse-movement need to be done here,
+ * not in the apply callback! */
+static int view_zoomdrag_modal(bContext *C, wmOperator *op, const wmEvent *event)
+{
+ v2dViewZoomData *vzd = static_cast<v2dViewZoomData *>(op->customdata);
+ View2D *v2d = vzd->v2d;
+
+ /* execute the events */
+ if (event->type == TIMER && event->customdata == vzd->timer) {
+ view_zoomdrag_apply(C, op);
+ }
+ else if (event->type == MOUSEMOVE) {
+ float dx, dy;
+ float zoomfac = 0.01f;
+
+ /* some view2d's (graph) don't have min/max zoom, or extreme ones */
+ if (v2d->maxzoom > 0.0f) {
+ zoomfac = clamp_f(0.001f * v2d->maxzoom, 0.001f, 0.01f);
+ }
+
+ /* calculate new delta transform, based on zooming mode */
+ if (U.viewzoom == USER_ZOOM_SCALE) {
+ /* 'scale' zooming */
+ float dist;
+ float len_old[2];
+ float len_new[2];
+
+ /* x-axis transform */
+ dist = BLI_rcti_size_x(&v2d->mask) / 2.0f;
+ len_old[0] = zoomfac * fabsf(vzd->lastx - vzd->region->winrct.xmin - dist);
+ len_new[0] = zoomfac * fabsf(event->xy[0] - vzd->region->winrct.xmin - dist);
+
+ /* y-axis transform */
+ dist = BLI_rcti_size_y(&v2d->mask) / 2.0f;
+ len_old[1] = zoomfac * fabsf(vzd->lasty - vzd->region->winrct.ymin - dist);
+ len_new[1] = zoomfac * fabsf(event->xy[1] - vzd->region->winrct.ymin - dist);
+
+ /* Calculate distance */
+ if (v2d->keepzoom & V2D_KEEPASPECT) {
+ dist = len_v2(len_new) - len_v2(len_old);
+ dx = dy = dist;
+ }
+ else {
+ dx = len_new[0] - len_old[0];
+ dy = len_new[1] - len_old[1];
+ }
+
+ dx *= BLI_rctf_size_x(&v2d->cur);
+ dy *= BLI_rctf_size_y(&v2d->cur);
+ }
+ else { /* USER_ZOOM_CONTINUE or USER_ZOOM_DOLLY */
+ float facx = zoomfac * (event->xy[0] - vzd->lastx);
+ float facy = zoomfac * (event->xy[1] - vzd->lasty);
+
+ /* Only respect user setting zoom axis if the view does not have any zoom restrictions
+ * any will be scaled uniformly */
+ if ((v2d->keepzoom & V2D_LOCKZOOM_X) == 0 && (v2d->keepzoom & V2D_LOCKZOOM_Y) == 0 &&
+ (v2d->keepzoom & V2D_KEEPASPECT)) {
+ if (U.uiflag & USER_ZOOM_HORIZ) {
+ facy = 0.0f;
+ }
+ else {
+ facx = 0.0f;
+ }
+ }
+
+ /* support zoom to always zoom entirely - the v2d code uses portrait or
+ * landscape exceptions */
+ if (v2d->keepzoom & V2D_KEEPASPECT) {
+ if (fabsf(facx) > fabsf(facy)) {
+ facy = facx;
+ }
+ else {
+ facx = facy;
+ }
+ }
+
+ dx = facx * BLI_rctf_size_x(&v2d->cur);
+ dy = facy * BLI_rctf_size_y(&v2d->cur);
+ }
+
+ if (U.uiflag & USER_ZOOM_INVERT) {
+ dx *= -1.0f;
+ dy *= -1.0f;
+ }
+
+ /* set transform amount, and add current deltas to stored total delta (for redo) */
+ RNA_float_set(op->ptr, "deltax", dx);
+ RNA_float_set(op->ptr, "deltay", dy);
+
+ vzd->dx += dx;
+ vzd->dy += dy;
+
+ /* Store mouse coordinates for next time, if not doing continuous zoom:
+ * - Continuous zoom only depends on distance of mouse
+ * to starting point to determine rate of change.
+ */
+ if (U.viewzoom != USER_ZOOM_CONTINUE) { /* XXX store this setting as RNA prop? */
+ vzd->lastx = event->xy[0];
+ vzd->lasty = event->xy[1];
+ }
+
+ /* apply zooming */
+ view_zoomdrag_apply(C, op);
+ }
+ else if (ELEM(event->type, vzd->invoke_event, EVT_ESCKEY)) {
+ if (event->val == KM_RELEASE) {
+
+ /* for redo, store the overall deltas - need to respect zoom-locks here... */
+ if ((v2d->keepzoom & V2D_LOCKZOOM_X) == 0) {
+ RNA_float_set(op->ptr, "deltax", vzd->dx);
+ }
+ else {
+ RNA_float_set(op->ptr, "deltax", 0);
+ }
+
+ if ((v2d->keepzoom & V2D_LOCKZOOM_Y) == 0) {
+ RNA_float_set(op->ptr, "deltay", vzd->dy);
+ }
+ else {
+ RNA_float_set(op->ptr, "deltay", 0);
+ }
+
+ /* free customdata */
+ view_zoomdrag_exit(C, op);
+ WM_cursor_modal_restore(CTX_wm_window(C));
+
+ return OPERATOR_FINISHED;
+ }
+ }
+
+ return OPERATOR_RUNNING_MODAL;
+}
+
+static void VIEW2D_OT_zoom(wmOperatorType *ot)
+{
+ PropertyRNA *prop;
+ /* identifiers */
+ ot->name = "Zoom 2D View";
+ ot->description = "Zoom in/out the view";
+ ot->idname = "VIEW2D_OT_zoom";
+
+ /* api callbacks */
+ ot->exec = view_zoomdrag_exec;
+ ot->invoke = view_zoomdrag_invoke;
+ ot->modal = view_zoomdrag_modal;
+ ot->cancel = view_zoomdrag_cancel;
+
+ ot->poll = view_zoom_poll;
+
+ /* operator is repeatable */
+ ot->flag = OPTYPE_BLOCKING | OPTYPE_GRAB_CURSOR_XY;
+
+ /* rna - must keep these in sync with the other operators */
+ prop = RNA_def_float(ot->srna, "deltax", 0, -FLT_MAX, FLT_MAX, "Delta X", "", -FLT_MAX, FLT_MAX);
+ RNA_def_property_flag(prop, PROP_HIDDEN);
+ prop = RNA_def_float(ot->srna, "deltay", 0, -FLT_MAX, FLT_MAX, "Delta Y", "", -FLT_MAX, FLT_MAX);
+ RNA_def_property_flag(prop, PROP_HIDDEN);
+
+ WM_operator_properties_use_cursor_init(ot);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Border Zoom Operator
+ * \{ */
+
+/**
+ * The user defines a rect using standard box select tools, and we use this rect to
+ * define the new zoom-level of the view in the following ways:
+ *
+ * -# LEFTMOUSE - zoom in to view
+ * -# RIGHTMOUSE - zoom out of view
+ *
+ * Currently, these key mappings are hardcoded, but it shouldn't be too important to
+ * have custom keymappings for this...
+ */
+
+static int view_borderzoom_exec(bContext *C, wmOperator *op)
+{
+ ARegion *region = CTX_wm_region(C);
+ View2D *v2d = &region->v2d;
+ rctf cur_new = v2d->cur;
+ const int smooth_viewtx = WM_operator_smooth_viewtx_get(op);
+
+ /* convert coordinates of rect to 'tot' rect coordinates */
+ rctf rect;
+ WM_operator_properties_border_to_rctf(op, &rect);
+ UI_view2d_region_to_view_rctf(v2d, &rect, &rect);
+
+ /* check if zooming in/out view */
+ const bool zoom_in = !RNA_boolean_get(op->ptr, "zoom_out");
+
+ if (zoom_in) {
+ /* zoom in:
+ * - 'cur' rect will be defined by the coordinates of the border region
+ * - just set the 'cur' rect to have the same coordinates as the border region
+ * if zoom is allowed to be changed
+ */
+ if ((v2d->keepzoom & V2D_LOCKZOOM_X) == 0) {
+ cur_new.xmin = rect.xmin;
+ cur_new.xmax = rect.xmax;
+ }
+ if ((v2d->keepzoom & V2D_LOCKZOOM_Y) == 0) {
+ cur_new.ymin = rect.ymin;
+ cur_new.ymax = rect.ymax;
+ }
+ }
+ else {
+ /* zoom out:
+ * - the current 'cur' rect coordinates are going to end up where the 'rect' ones are,
+ * but the 'cur' rect coordinates will need to be adjusted to take in more of the view
+ * - calculate zoom factor, and adjust using center-point
+ */
+ float zoom, center, size;
+
+ /* TODO: is this zoom factor calculation valid?
+ * It seems to produce same results every time... */
+ if ((v2d->keepzoom & V2D_LOCKZOOM_X) == 0) {
+ size = BLI_rctf_size_x(&cur_new);
+ zoom = size / BLI_rctf_size_x(&rect);
+ center = BLI_rctf_cent_x(&cur_new);
+
+ cur_new.xmin = center - (size * zoom);
+ cur_new.xmax = center + (size * zoom);
+ }
+ if ((v2d->keepzoom & V2D_LOCKZOOM_Y) == 0) {
+ size = BLI_rctf_size_y(&cur_new);
+ zoom = size / BLI_rctf_size_y(&rect);
+ center = BLI_rctf_cent_y(&cur_new);
+
+ cur_new.ymin = center - (size * zoom);
+ cur_new.ymax = center + (size * zoom);
+ }
+ }
+
+ UI_view2d_smooth_view(C, region, &cur_new, smooth_viewtx);
+
+ return OPERATOR_FINISHED;
+}
+
+static void VIEW2D_OT_zoom_border(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "Zoom to Border";
+ ot->description = "Zoom in the view to the nearest item contained in the border";
+ ot->idname = "VIEW2D_OT_zoom_border";
+
+ /* api callbacks */
+ ot->invoke = WM_gesture_box_invoke;
+ ot->exec = view_borderzoom_exec;
+ ot->modal = WM_gesture_box_modal;
+ ot->cancel = WM_gesture_box_cancel;
+
+ ot->poll = view_zoom_poll;
+
+ /* rna */
+ WM_operator_properties_gesture_box_zoom(ot);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name NDOF Pan/Zoom Operator
+ * \{ */
+
+#ifdef WITH_INPUT_NDOF
+static int view2d_ndof_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+ if (event->type != NDOF_MOTION) {
+ return OPERATOR_CANCELLED;
+ }
+
+ const wmNDOFMotionData *ndof = static_cast<const wmNDOFMotionData *>(event->customdata);
+
+ /* tune these until it feels right */
+ const float zoom_sensitivity = 0.5f;
+ const float speed = 10.0f; /* match view3d ortho */
+ const bool has_translate = !is_zero_v2(ndof->tvec) && view_pan_poll(C);
+ const bool has_zoom = (ndof->tvec[2] != 0.0f) && view_zoom_poll(C);
+
+ if (has_translate) {
+ float pan_vec[3];
+
+ WM_event_ndof_pan_get(ndof, pan_vec, false);
+
+ pan_vec[0] *= speed;
+ pan_vec[1] *= speed;
+
+ view_pan_init(C, op);
+
+ v2dViewPanData *vpd = static_cast<v2dViewPanData *>(op->customdata);
+ view_pan_apply_ex(C, vpd, pan_vec[0], pan_vec[1]);
+
+ view_pan_exit(op);
+ }
+
+ if (has_zoom) {
+ float zoom_factor = zoom_sensitivity * ndof->dt * -ndof->tvec[2];
+
+ bool do_zoom_xy[2];
+
+ if (U.ndof_flag & NDOF_ZOOM_INVERT) {
+ zoom_factor = -zoom_factor;
+ }
+
+ view_zoom_axis_lock_defaults(C, do_zoom_xy);
+
+ view_zoomdrag_init(C, op);
+
+ v2dViewZoomData *vzd = static_cast<v2dViewZoomData *>(op->customdata);
+ view_zoomstep_apply_ex(
+ C, vzd, do_zoom_xy[0] ? zoom_factor : 0.0f, do_zoom_xy[1] ? zoom_factor : 0.0f);
+
+ view_zoomstep_exit(op);
+ }
+
+ return OPERATOR_FINISHED;
+}
+
+static void VIEW2D_OT_ndof(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "NDOF Pan/Zoom";
+ ot->idname = "VIEW2D_OT_ndof";
+ ot->description = "Use a 3D mouse device to pan/zoom the view";
+
+ /* api callbacks */
+ ot->invoke = view2d_ndof_invoke;
+ ot->poll = view2d_poll;
+
+ /* flags */
+ ot->flag = OPTYPE_LOCK_BYPASS;
+}
+#endif /* WITH_INPUT_NDOF */
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Smooth View Operator
+ * \{ */
+
+struct SmoothView2DStore {
+ rctf orig_cur, new_cur;
+
+ double time_allowed;
+};
+
+/**
+ * function to get a factor out of a rectangle
+ *
+ * NOTE: this doesn't always work as well as it might because the target size
+ * may not be reached because of clamping the desired rect, we _could_
+ * attempt to clamp the rect before working out the zoom factor but its
+ * not really worthwhile for the few cases this happens.
+ */
+static float smooth_view_rect_to_fac(const rctf *rect_a, const rctf *rect_b)
+{
+ const float size_a[2] = {BLI_rctf_size_x(rect_a), BLI_rctf_size_y(rect_a)};
+ const float size_b[2] = {BLI_rctf_size_x(rect_b), BLI_rctf_size_y(rect_b)};
+ const float cent_a[2] = {BLI_rctf_cent_x(rect_a), BLI_rctf_cent_y(rect_a)};
+ const float cent_b[2] = {BLI_rctf_cent_x(rect_b), BLI_rctf_cent_y(rect_b)};
+
+ float fac_max = 0.0f;
+
+ for (int i = 0; i < 2; i++) {
+ /* axis translation normalized to scale */
+ float tfac = fabsf(cent_a[i] - cent_b[i]) / min_ff(size_a[i], size_b[i]);
+ fac_max = max_ff(fac_max, tfac);
+ if (fac_max >= 1.0f) {
+ break;
+ }
+
+ /* axis scale difference, x2 so doubling or half gives 1.0f */
+ tfac = (1.0f - (min_ff(size_a[i], size_b[i]) / max_ff(size_a[i], size_b[i]))) * 2.0f;
+ fac_max = max_ff(fac_max, tfac);
+ if (fac_max >= 1.0f) {
+ break;
+ }
+ }
+ return min_ff(fac_max, 1.0f);
+}
+
+void UI_view2d_smooth_view(bContext *C, ARegion *region, const rctf *cur, const int smooth_viewtx)
+{
+ wmWindowManager *wm = CTX_wm_manager(C);
+ wmWindow *win = CTX_wm_window(C);
+
+ View2D *v2d = &region->v2d;
+ SmoothView2DStore sms = {{0}};
+ bool ok = false;
+ float fac = 1.0f;
+
+ /* initialize sms */
+ sms.new_cur = v2d->cur;
+
+ /* store the options we want to end with */
+ if (cur) {
+ sms.new_cur = *cur;
+ }
+
+ if (cur) {
+ fac = smooth_view_rect_to_fac(&v2d->cur, cur);
+ }
+
+ if (smooth_viewtx && fac > FLT_EPSILON) {
+ bool changed = false;
+
+ if (BLI_rctf_compare(&sms.new_cur, &v2d->cur, FLT_EPSILON) == false) {
+ changed = true;
+ }
+
+ /* The new view is different from the old one
+ * so animate the view */
+ if (changed) {
+ sms.orig_cur = v2d->cur;
+
+ sms.time_allowed = (double)smooth_viewtx / 1000.0;
+
+ /* scale the time allowed the change in view */
+ sms.time_allowed *= (double)fac;
+
+ /* keep track of running timer! */
+ if (v2d->sms == nullptr) {
+ v2d->sms = MEM_new<SmoothView2DStore>(__func__);
+ }
+ *v2d->sms = sms;
+ if (v2d->smooth_timer) {
+ WM_event_remove_timer(wm, win, v2d->smooth_timer);
+ }
+ /* TIMER1 is hard-coded in key-map. */
+ v2d->smooth_timer = WM_event_add_timer(wm, win, TIMER1, 1.0 / 100.0);
+
+ ok = true;
+ }
+ }
+
+ /* if we get here nothing happens */
+ if (ok == false) {
+ v2d->cur = sms.new_cur;
+
+ UI_view2d_curRect_changed(C, v2d);
+ ED_region_tag_redraw_no_rebuild(region);
+ UI_view2d_sync(CTX_wm_screen(C), CTX_wm_area(C), v2d, V2D_LOCK_COPY);
+ }
+}
+
+/* only meant for timer usage */
+static int view2d_smoothview_invoke(bContext *C, wmOperator *UNUSED(op), const wmEvent *event)
+{
+ wmWindow *win = CTX_wm_window(C);
+ ARegion *region = CTX_wm_region(C);
+ View2D *v2d = &region->v2d;
+ SmoothView2DStore *sms = v2d->sms;
+
+ /* escape if not our timer */
+ if (v2d->smooth_timer == nullptr || v2d->smooth_timer != event->customdata) {
+ return OPERATOR_PASS_THROUGH;
+ }
+
+ float step;
+ if (sms->time_allowed != 0.0) {
+ step = (float)((v2d->smooth_timer->duration) / sms->time_allowed);
+ }
+ else {
+ step = 1.0f;
+ }
+
+ /* end timer */
+ if (step >= 1.0f) {
+ v2d->cur = sms->new_cur;
+
+ MEM_freeN(v2d->sms);
+ v2d->sms = nullptr;
+
+ WM_event_remove_timer(CTX_wm_manager(C), win, v2d->smooth_timer);
+ v2d->smooth_timer = nullptr;
+
+ /* Event handling won't know if a UI item has been moved under the pointer. */
+ WM_event_add_mousemove(win);
+ }
+ else {
+ /* ease in/out */
+ step = (3.0f * step * step - 2.0f * step * step * step);
+
+ BLI_rctf_interp(&v2d->cur, &sms->orig_cur, &sms->new_cur, step);
+ }
+
+ UI_view2d_curRect_changed(C, v2d);
+ UI_view2d_sync(CTX_wm_screen(C), CTX_wm_area(C), v2d, V2D_LOCK_COPY);
+ ED_region_tag_redraw_no_rebuild(region);
+
+ if (v2d->sms == nullptr) {
+ UI_view2d_zoom_cache_reset();
+ }
+
+ return OPERATOR_FINISHED;
+}
+
+static void VIEW2D_OT_smoothview(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "Smooth View 2D";
+ ot->idname = "VIEW2D_OT_smoothview";
+
+ /* api callbacks */
+ ot->invoke = view2d_smoothview_invoke;
+ ot->poll = view2d_poll;
+
+ /* flags */
+ ot->flag = OPTYPE_INTERNAL;
+
+ /* rna */
+ WM_operator_properties_gesture_box(ot);
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Scroll Bar Move Operator
+ * \{ */
+
+/**
+ * Scrollers should behave in the following ways, when clicked on with LMB (and dragged):
+ * -# 'Handles' on end of 'bubble' - when the axis that the scroller represents is zoomable,
+ * enlarge 'cur' rect on the relevant side.
+ * -# 'Bubble'/'bar' - just drag, and bar should move with mouse (view pans opposite).
+ *
+ * In order to make sure this works, each operator must define the following RNA-Operator Props:
+ * - `deltax, deltay` - define how much to move view by (relative to zoom-correction factor)
+ */
+
+/* customdata for scroller-invoke data */
+struct v2dScrollerMove {
+ /** View2D data that this operation affects */
+ View2D *v2d;
+ /** region that the scroller is in */
+ ARegion *region;
+
+ /** scroller that mouse is in ('h' or 'v') */
+ char scroller;
+
+ /* XXX find some way to provide visual feedback of this (active color?) */
+ /** -1 is min zoomer, 0 is bar, 1 is max zoomer */
+ short zone;
+
+ /** view adjustment factor, based on size of region */
+ float fac;
+ /** for pixel rounding (avoid visible UI jitter) */
+ float fac_round;
+ /** amount moved by mouse on axis of interest */
+ float delta;
+
+ /** width of the scrollbar itself, used for page up/down clicks */
+ float scrollbarwidth;
+ /** initial location of scrollbar x/y, mouse relative */
+ int scrollbar_orig;
+
+ /** previous mouse coordinates (in screen coordinates) for determining movement */
+ int lastx, lasty;
+};
+
+/**
+ * #View2DScrollers is typedef'd in UI_view2d.h
+ * This is a CUT DOWN VERSION of the 'real' version, which is defined in view2d.c,
+ * as we only need focus bubble info.
+ *
+ * \warning The start of this struct must not change,
+ * so that it stays in sync with the 'real' version.
+ * For now, we don't need to have a separate (internal) header for structs like this...
+ */
+struct View2DScrollers {
+ int vert_min, vert_max; /* vertical scrollbar */
+ int hor_min, hor_max; /* horizontal scrollbar */
+
+ /* These values are written into, even if we don't use them. */
+ rcti _hor, _vert;
+};
+
+/* quick enum for vsm->zone (scroller handles) */
+enum {
+ SCROLLHANDLE_MIN = -1,
+ SCROLLHANDLE_BAR,
+ SCROLLHANDLE_MAX,
+ SCROLLHANDLE_MIN_OUTSIDE,
+ SCROLLHANDLE_MAX_OUTSIDE,
+} /*eV2DScrollerHandle_Zone*/;
+
+/**
+ * Check if mouse is within scroller handle.
+ *
+ * \param mouse: relevant mouse coordinate in region space.
+ * \param sc_min, sc_max: extents of scroller 'groove' (potential available space for scroller).
+ * \param sh_min, sh_max: positions of scrollbar handles.
+ */
+static short mouse_in_scroller_handle(int mouse, int sc_min, int sc_max, int sh_min, int sh_max)
+{
+ /* firstly, check if
+ * - 'bubble' fills entire scroller
+ * - 'bubble' completely out of view on either side
+ */
+ bool in_view = true;
+ if (sh_min <= sc_min && sc_max <= sh_max) {
+ in_view = false;
+ }
+ else if (sh_max <= sc_min || sc_max <= sh_min) {
+ in_view = false;
+ }
+
+ if (!in_view) {
+ return SCROLLHANDLE_BAR;
+ }
+
+ /* check if mouse is in or past either handle */
+ /* TODO: check if these extents are still valid or not */
+ bool in_max = ((mouse >= (sh_max - V2D_SCROLL_HANDLE_SIZE_HOTSPOT)) &&
+ (mouse <= (sh_max + V2D_SCROLL_HANDLE_SIZE_HOTSPOT)));
+ bool in_min = ((mouse <= (sh_min + V2D_SCROLL_HANDLE_SIZE_HOTSPOT)) &&
+ (mouse >= (sh_min - V2D_SCROLL_HANDLE_SIZE_HOTSPOT)));
+ bool in_bar = ((mouse < (sh_max - V2D_SCROLL_HANDLE_SIZE_HOTSPOT)) &&
+ (mouse > (sh_min + V2D_SCROLL_HANDLE_SIZE_HOTSPOT)));
+ const bool out_min = mouse < (sh_min - V2D_SCROLL_HANDLE_SIZE_HOTSPOT);
+ const bool out_max = mouse > (sh_max + V2D_SCROLL_HANDLE_SIZE_HOTSPOT);
+
+ if (in_bar) {
+ return SCROLLHANDLE_BAR;
+ }
+ if (in_max) {
+ return SCROLLHANDLE_MAX;
+ }
+ if (in_min) {
+ return SCROLLHANDLE_MIN;
+ }
+ if (out_min) {
+ return SCROLLHANDLE_MIN_OUTSIDE;
+ }
+ if (out_max) {
+ return SCROLLHANDLE_MAX_OUTSIDE;
+ }
+
+ /* unlikely to happen, though we just cover it in case */
+ return SCROLLHANDLE_BAR;
+}
+
+static bool scroller_activate_poll(bContext *C)
+{
+ if (!view2d_poll(C)) {
+ return false;
+ }
+
+ wmWindow *win = CTX_wm_window(C);
+ ARegion *region = CTX_wm_region(C);
+ View2D *v2d = &region->v2d;
+ wmEvent *event = win->eventstate;
+
+ /* check if mouse in scrollbars, if they're enabled */
+ return (UI_view2d_mouse_in_scrollers(region, v2d, event->xy) != 0);
+}
+
+/* initialize customdata for scroller manipulation operator */
+static void scroller_activate_init(bContext *C,
+ wmOperator *op,
+ const wmEvent *event,
+ const char in_scroller)
+{
+ ARegion *region = CTX_wm_region(C);
+ View2D *v2d = &region->v2d;
+
+ /* set custom-data for operator */
+ v2dScrollerMove *vsm = MEM_cnew<v2dScrollerMove>(__func__);
+ op->customdata = vsm;
+
+ /* set general data */
+ vsm->v2d = v2d;
+ vsm->region = region;
+ vsm->scroller = in_scroller;
+
+ /* store mouse-coordinates, and convert mouse/screen coordinates to region coordinates */
+ vsm->lastx = event->xy[0];
+ vsm->lasty = event->xy[1];
+ /* 'zone' depends on where mouse is relative to bubble
+ * - zooming must be allowed on this axis, otherwise, default to pan
+ */
+ View2DScrollers scrollers;
+ UI_view2d_scrollers_calc(v2d, nullptr, &scrollers);
+
+ /* Use a union of 'cur' & 'tot' in case the current view is far outside 'tot'. In this cases
+ * moving the scroll bars has far too little effect and the view can get stuck T31476. */
+ rctf tot_cur_union = v2d->tot;
+ BLI_rctf_union(&tot_cur_union, &v2d->cur);
+
+ if (in_scroller == 'h') {
+ /* horizontal scroller - calculate adjustment factor first */
+ const float mask_size = (float)BLI_rcti_size_x(&v2d->hor);
+ vsm->fac = BLI_rctf_size_x(&tot_cur_union) / mask_size;
+
+ /* pixel rounding */
+ vsm->fac_round = (BLI_rctf_size_x(&v2d->cur)) / (float)(BLI_rcti_size_x(&region->winrct) + 1);
+
+ /* get 'zone' (i.e. which part of scroller is activated) */
+ vsm->zone = mouse_in_scroller_handle(
+ event->mval[0], v2d->hor.xmin, v2d->hor.xmax, scrollers.hor_min, scrollers.hor_max);
+
+ if ((v2d->keepzoom & V2D_LOCKZOOM_X) && ELEM(vsm->zone, SCROLLHANDLE_MIN, SCROLLHANDLE_MAX)) {
+ /* default to scroll, as handles not usable */
+ vsm->zone = SCROLLHANDLE_BAR;
+ }
+
+ vsm->scrollbarwidth = scrollers.hor_max - scrollers.hor_min;
+ vsm->scrollbar_orig = ((scrollers.hor_max + scrollers.hor_min) / 2) + region->winrct.xmin;
+ }
+ else {
+ /* vertical scroller - calculate adjustment factor first */
+ const float mask_size = (float)BLI_rcti_size_y(&v2d->vert);
+ vsm->fac = BLI_rctf_size_y(&tot_cur_union) / mask_size;
+
+ /* pixel rounding */
+ vsm->fac_round = (BLI_rctf_size_y(&v2d->cur)) / (float)(BLI_rcti_size_y(&region->winrct) + 1);
+
+ /* get 'zone' (i.e. which part of scroller is activated) */
+ vsm->zone = mouse_in_scroller_handle(
+ event->mval[1], v2d->vert.ymin, v2d->vert.ymax, scrollers.vert_min, scrollers.vert_max);
+
+ if ((v2d->keepzoom & V2D_LOCKZOOM_Y) && ELEM(vsm->zone, SCROLLHANDLE_MIN, SCROLLHANDLE_MAX)) {
+ /* default to scroll, as handles not usable */
+ vsm->zone = SCROLLHANDLE_BAR;
+ }
+
+ vsm->scrollbarwidth = scrollers.vert_max - scrollers.vert_min;
+ vsm->scrollbar_orig = ((scrollers.vert_max + scrollers.vert_min) / 2) + region->winrct.ymin;
+ }
+
+ vsm->v2d->flag |= V2D_IS_NAVIGATING;
+
+ ED_region_tag_redraw_no_rebuild(region);
+}
+
+/* Cleanup temp custom-data. */
+static void scroller_activate_exit(bContext *C, wmOperator *op)
+{
+ if (op->customdata) {
+ v2dScrollerMove *vsm = static_cast<v2dScrollerMove *>(op->customdata);
+
+ vsm->v2d->scroll_ui &= ~(V2D_SCROLL_H_ACTIVE | V2D_SCROLL_V_ACTIVE);
+ vsm->v2d->flag &= ~V2D_IS_NAVIGATING;
+
+ MEM_freeN(op->customdata);
+ op->customdata = nullptr;
+
+ ED_region_tag_redraw_no_rebuild(CTX_wm_region(C));
+ }
+}
+
+static void scroller_activate_cancel(bContext *C, wmOperator *op)
+{
+ scroller_activate_exit(C, op);
+}
+
+/* apply transform to view (i.e. adjust 'cur' rect) */
+static void scroller_activate_apply(bContext *C, wmOperator *op)
+{
+ v2dScrollerMove *vsm = static_cast<v2dScrollerMove *>(op->customdata);
+ View2D *v2d = vsm->v2d;
+
+ /* calculate amount to move view by */
+ float temp = vsm->fac * vsm->delta;
+
+ /* round to pixel */
+ temp = roundf(temp / vsm->fac_round) * vsm->fac_round;
+
+ /* type of movement */
+ switch (vsm->zone) {
+ case SCROLLHANDLE_MIN:
+ /* only expand view on axis if zoom is allowed */
+ if ((vsm->scroller == 'h') && !(v2d->keepzoom & V2D_LOCKZOOM_X)) {
+ v2d->cur.xmin -= temp;
+ }
+ if ((vsm->scroller == 'v') && !(v2d->keepzoom & V2D_LOCKZOOM_Y)) {
+ v2d->cur.ymin -= temp;
+ }
+ break;
+
+ case SCROLLHANDLE_MAX:
+
+ /* only expand view on axis if zoom is allowed */
+ if ((vsm->scroller == 'h') && !(v2d->keepzoom & V2D_LOCKZOOM_X)) {
+ v2d->cur.xmax += temp;
+ }
+ if ((vsm->scroller == 'v') && !(v2d->keepzoom & V2D_LOCKZOOM_Y)) {
+ v2d->cur.ymax += temp;
+ }
+ break;
+
+ case SCROLLHANDLE_MIN_OUTSIDE:
+ case SCROLLHANDLE_MAX_OUTSIDE:
+ case SCROLLHANDLE_BAR:
+ default:
+ /* only move view on an axis if panning is allowed */
+ if ((vsm->scroller == 'h') && !(v2d->keepofs & V2D_LOCKOFS_X)) {
+ v2d->cur.xmin += temp;
+ v2d->cur.xmax += temp;
+ }
+ if ((vsm->scroller == 'v') && !(v2d->keepofs & V2D_LOCKOFS_Y)) {
+ v2d->cur.ymin += temp;
+ v2d->cur.ymax += temp;
+ }
+ break;
+ }
+
+ /* Inform v2d about changes after this operation. */
+ UI_view2d_curRect_changed(C, v2d);
+
+ /* request updates to be done... */
+ ED_region_tag_redraw_no_rebuild(vsm->region);
+ UI_view2d_sync(CTX_wm_screen(C), CTX_wm_area(C), v2d, V2D_LOCK_COPY);
+}
+
+/**
+ * Handle user input for scrollers - calculations of mouse-movement need to be done here,
+ * not in the apply callback!
+ */
+static int scroller_activate_modal(bContext *C, wmOperator *op, const wmEvent *event)
+{
+ v2dScrollerMove *vsm = static_cast<v2dScrollerMove *>(op->customdata);
+
+ /* execute the events */
+ switch (event->type) {
+ case MOUSEMOVE: {
+ /* calculate new delta transform, then store mouse-coordinates for next-time */
+ if (ELEM(vsm->zone, SCROLLHANDLE_BAR, SCROLLHANDLE_MAX)) {
+ /* if using bar (i.e. 'panning') or 'max' zoom widget */
+ switch (vsm->scroller) {
+ case 'h': /* horizontal scroller - so only horizontal movement
+ * ('cur' moves opposite to mouse) */
+ vsm->delta = (float)(event->xy[0] - vsm->lastx);
+ break;
+ case 'v': /* vertical scroller - so only vertical movement
+ * ('cur' moves opposite to mouse) */
+ vsm->delta = (float)(event->xy[1] - vsm->lasty);
+ break;
+ }
+ }
+ else if (vsm->zone == SCROLLHANDLE_MIN) {
+ /* using 'min' zoom widget */
+ switch (vsm->scroller) {
+ case 'h': /* horizontal scroller - so only horizontal movement
+ * ('cur' moves with mouse) */
+ vsm->delta = (float)(vsm->lastx - event->xy[0]);
+ break;
+ case 'v': /* vertical scroller - so only vertical movement
+ * ('cur' moves with to mouse) */
+ vsm->delta = (float)(vsm->lasty - event->xy[1]);
+ break;
+ }
+ }
+
+ /* store previous coordinates */
+ vsm->lastx = event->xy[0];
+ vsm->lasty = event->xy[1];
+
+ scroller_activate_apply(C, op);
+ break;
+ }
+ case LEFTMOUSE:
+ case MIDDLEMOUSE:
+ if (event->val == KM_RELEASE) {
+ /* single-click was in empty space outside bubble, so scroll by 1 'page' */
+ if (ELEM(vsm->zone, SCROLLHANDLE_MIN_OUTSIDE, SCROLLHANDLE_MAX_OUTSIDE)) {
+ if (vsm->zone == SCROLLHANDLE_MIN_OUTSIDE) {
+ vsm->delta = -vsm->scrollbarwidth * 0.8f;
+ }
+ else if (vsm->zone == SCROLLHANDLE_MAX_OUTSIDE) {
+ vsm->delta = vsm->scrollbarwidth * 0.8f;
+ }
+
+ scroller_activate_apply(C, op);
+ scroller_activate_exit(C, op);
+ return OPERATOR_FINISHED;
+ }
+
+ /* Otherwise, end the drag action. */
+ if (vsm->lastx || vsm->lasty) {
+ scroller_activate_exit(C, op);
+ return OPERATOR_FINISHED;
+ }
+ }
+ break;
+ }
+
+ return OPERATOR_RUNNING_MODAL;
+}
+
+/* a click (or click drag in progress)
+ * should have occurred, so check if it happened in scrollbar */
+static int scroller_activate_invoke(bContext *C, wmOperator *op, const wmEvent *event)
+{
+ ARegion *region = CTX_wm_region(C);
+ View2D *v2d = &region->v2d;
+
+ /* check if mouse in scrollbars, if they're enabled */
+ const char in_scroller = UI_view2d_mouse_in_scrollers(region, v2d, event->xy);
+
+ /* if in a scroller, init customdata then set modal handler which will
+ * catch mouse-down to start doing useful stuff */
+ if (in_scroller) {
+ /* initialize customdata */
+ scroller_activate_init(C, op, event, in_scroller);
+ v2dScrollerMove *vsm = (v2dScrollerMove *)op->customdata;
+
+ /* Support for quick jump to location - GTK and QT do this on Linux. */
+ if (event->type == MIDDLEMOUSE) {
+ switch (vsm->scroller) {
+ case 'h': /* horizontal scroller - so only horizontal movement
+ * ('cur' moves opposite to mouse) */
+ vsm->delta = (float)(event->xy[0] - vsm->scrollbar_orig);
+ break;
+ case 'v': /* vertical scroller - so only vertical movement
+ * ('cur' moves opposite to mouse) */
+ vsm->delta = (float)(event->xy[1] - vsm->scrollbar_orig);
+ break;
+ }
+ scroller_activate_apply(C, op);
+
+ vsm->zone = SCROLLHANDLE_BAR;
+ }
+
+ /* check if zoom zones are inappropriate (i.e. zoom widgets not shown), so cannot continue
+ * NOTE: see view2d.c for latest conditions, and keep this in sync with that
+ */
+ if (ELEM(vsm->zone, SCROLLHANDLE_MIN, SCROLLHANDLE_MAX)) {
+ if (((vsm->scroller == 'h') && (v2d->scroll & V2D_SCROLL_HORIZONTAL_HANDLES) == 0) ||
+ ((vsm->scroller == 'v') && (v2d->scroll & V2D_SCROLL_VERTICAL_HANDLES) == 0)) {
+ /* switch to bar (i.e. no scaling gets handled) */
+ vsm->zone = SCROLLHANDLE_BAR;
+ }
+ }
+
+ /* check if zone is inappropriate (i.e. 'bar' but panning is banned), so cannot continue */
+ if (vsm->zone == SCROLLHANDLE_BAR) {
+ if (((vsm->scroller == 'h') && (v2d->keepofs & V2D_LOCKOFS_X)) ||
+ ((vsm->scroller == 'v') && (v2d->keepofs & V2D_LOCKOFS_Y))) {
+ /* free customdata initialized */
+ scroller_activate_exit(C, op);
+
+ /* can't catch this event for ourselves, so let it go to someone else? */
+ return OPERATOR_PASS_THROUGH;
+ }
+ }
+
+ /* zone is also inappropriate if scroller is not visible... */
+ if (((vsm->scroller == 'h') && (v2d->scroll & V2D_SCROLL_HORIZONTAL_FULLR)) ||
+ ((vsm->scroller == 'v') && (v2d->scroll & V2D_SCROLL_VERTICAL_FULLR))) {
+ /* free customdata initialized */
+ scroller_activate_exit(C, op);
+
+ /* can't catch this event for ourselves, so let it go to someone else? */
+ /* XXX NOTE: if handlers use mask rect to clip input, input will fail for this case. */
+ return OPERATOR_PASS_THROUGH;
+ }
+
+ /* activate the scroller */
+ if (vsm->scroller == 'h') {
+ v2d->scroll_ui |= V2D_SCROLL_H_ACTIVE;
+ }
+ else {
+ v2d->scroll_ui |= V2D_SCROLL_V_ACTIVE;
+ }
+
+ /* still ok, so can add */
+ WM_event_add_modal_handler(C, op);
+ return OPERATOR_RUNNING_MODAL;
+ }
+
+ /* not in scroller, so nothing happened...
+ * (pass through let's something else catch event) */
+ return OPERATOR_PASS_THROUGH;
+}
+
+/* LMB-Drag in Scrollers - not repeatable operator! */
+static void VIEW2D_OT_scroller_activate(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "Scroller Activate";
+ ot->description = "Scroll view by mouse click and drag";
+ ot->idname = "VIEW2D_OT_scroller_activate";
+
+ /* flags */
+ ot->flag = OPTYPE_BLOCKING;
+
+ /* api callbacks */
+ ot->invoke = scroller_activate_invoke;
+ ot->modal = scroller_activate_modal;
+ ot->cancel = scroller_activate_cancel;
+
+ ot->poll = scroller_activate_poll;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name View Reset Operator
+ * \{ */
+
+static int reset_exec(bContext *C, wmOperator *UNUSED(op))
+{
+ const uiStyle *style = UI_style_get();
+ ARegion *region = CTX_wm_region(C);
+ View2D *v2d = &region->v2d;
+ const int snap_test = ED_region_snap_size_test(region);
+
+ /* zoom 1.0 */
+ const int winx = (float)(BLI_rcti_size_x(&v2d->mask) + 1);
+ const int winy = (float)(BLI_rcti_size_y(&v2d->mask) + 1);
+
+ v2d->cur.xmax = v2d->cur.xmin + winx;
+ v2d->cur.ymax = v2d->cur.ymin + winy;
+
+ /* align */
+ if (v2d->align) {
+ /* posx and negx flags are mutually exclusive, so watch out */
+ if ((v2d->align & V2D_ALIGN_NO_POS_X) && !(v2d->align & V2D_ALIGN_NO_NEG_X)) {
+ v2d->cur.xmax = 0.0f;
+ v2d->cur.xmin = -winx * style->panelzoom;
+ }
+ else if ((v2d->align & V2D_ALIGN_NO_NEG_X) && !(v2d->align & V2D_ALIGN_NO_POS_X)) {
+ v2d->cur.xmax = winx * style->panelzoom;
+ v2d->cur.xmin = 0.0f;
+ }
+
+ /* - posx and negx flags are mutually exclusive, so watch out */
+ if ((v2d->align & V2D_ALIGN_NO_POS_Y) && !(v2d->align & V2D_ALIGN_NO_NEG_Y)) {
+ v2d->cur.ymax = 0.0f;
+ v2d->cur.ymin = -winy * style->panelzoom;
+ }
+ else if ((v2d->align & V2D_ALIGN_NO_NEG_Y) && !(v2d->align & V2D_ALIGN_NO_POS_Y)) {
+ v2d->cur.ymax = winy * style->panelzoom;
+ v2d->cur.ymin = 0.0f;
+ }
+ }
+
+ /* Inform v2d about changes after this operation. */
+ UI_view2d_curRect_changed(C, v2d);
+
+ if (ED_region_snap_size_apply(region, snap_test)) {
+ ScrArea *area = CTX_wm_area(C);
+ ED_area_tag_redraw(area);
+ WM_event_add_notifier(C, NC_SCREEN | NA_EDITED, nullptr);
+ }
+
+ /* request updates to be done... */
+ ED_region_tag_redraw(region);
+ UI_view2d_sync(CTX_wm_screen(C), CTX_wm_area(C), v2d, V2D_LOCK_COPY);
+
+ UI_view2d_zoom_cache_reset();
+
+ return OPERATOR_FINISHED;
+}
+
+static void VIEW2D_OT_reset(wmOperatorType *ot)
+{
+ /* identifiers */
+ ot->name = "Reset View";
+ ot->description = "Reset the view";
+ ot->idname = "VIEW2D_OT_reset";
+
+ /* api callbacks */
+ ot->exec = reset_exec;
+ ot->poll = view2d_poll;
+}
+
+/** \} */
+
+/* -------------------------------------------------------------------- */
+/** \name Registration
+ * \{ */
+
+void ED_operatortypes_view2d(void)
+{
+ WM_operatortype_append(VIEW2D_OT_pan);
+ WM_operatortype_append(VIEW2D_OT_edge_pan);
+
+ WM_operatortype_append(VIEW2D_OT_scroll_left);
+ WM_operatortype_append(VIEW2D_OT_scroll_right);
+ WM_operatortype_append(VIEW2D_OT_scroll_up);
+ WM_operatortype_append(VIEW2D_OT_scroll_down);
+
+ WM_operatortype_append(VIEW2D_OT_zoom_in);
+ WM_operatortype_append(VIEW2D_OT_zoom_out);
+
+ WM_operatortype_append(VIEW2D_OT_zoom);
+ WM_operatortype_append(VIEW2D_OT_zoom_border);
+
+#ifdef WITH_INPUT_NDOF
+ WM_operatortype_append(VIEW2D_OT_ndof);
+#endif
+
+ WM_operatortype_append(VIEW2D_OT_smoothview);
+
+ WM_operatortype_append(VIEW2D_OT_scroller_activate);
+
+ WM_operatortype_append(VIEW2D_OT_reset);
+}
+
+void ED_keymap_view2d(wmKeyConfig *keyconf)
+{
+ WM_keymap_ensure(keyconf, "View2D", 0, 0);
+}
+
+/** \} */