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blender-archive/source/blender/editors/interface/view2d.c
Campbell Barton 384220eeab Partial fix T41749 
2d & 3d cached text now draws pixel aligned now.
2014-09-10 15:01:39 +10:00

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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2008 Blender Foundation.
* All rights reserved.
*
* Contributor(s): Blender Foundation, Joshua Leung
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/editors/interface/view2d.c
* \ingroup edinterface
*/
#include <float.h>
#include <limits.h>
#include <math.h>
#include <string.h>
#include "MEM_guardedalloc.h"
#include "DNA_scene_types.h"
#include "DNA_userdef_types.h"
#include "BLI_utildefines.h"
#include "BLI_link_utils.h"
#include "BLI_rect.h"
#include "BLI_math.h"
#include "BLI_memarena.h"
#include "BLI_timecode.h"
#include "BKE_context.h"
#include "BKE_screen.h"
#include "BKE_global.h"
#include "WM_api.h"
#include "BIF_gl.h"
#include "BLF_api.h"
#include "ED_screen.h"
#include "UI_interface.h"
#include "UI_view2d.h"
#include "interface_intern.h"
static void ui_view2d_curRect_validate_resize(View2D *v2d, int resize, int mask_scrollers);
/* *********************************************************************** */
BLI_INLINE int clamp_float_to_int(const float f)
{
const float min = INT_MIN;
const float max = INT_MAX;
if (UNLIKELY(f < min)) {
return min;
}
else if (UNLIKELY(f > max)) {
return max;
}
else {
return (int)f;
}
}
/**
* use instead of #BLI_rcti_rctf_copy so we have consistent behavior
* with users of #clamp_float_to_int.
*/
BLI_INLINE void clamp_rctf_to_rcti(rcti *dst, const rctf *src)
{
dst->xmin = clamp_float_to_int(src->xmin);
dst->xmax = clamp_float_to_int(src->xmax);
dst->ymin = clamp_float_to_int(src->ymin);
dst->ymax = clamp_float_to_int(src->ymax);
}
/* XXX still unresolved: scrolls hide/unhide vs region mask handling */
/* XXX there's V2D_SCROLL_HORIZONTAL_HIDE and V2D_SCROLL_HORIZONTAL_FULLR ... */
/* helper to allow scrollbars to dynamically hide
* - returns a copy of the scrollbar settings with the flags to display
* horizontal/vertical scrollbars removed
* - input scroll value is the v2d->scroll var
* - hide flags are set per region at drawtime
*/
static int view2d_scroll_mapped(int scroll)
{
if (scroll & V2D_SCROLL_HORIZONTAL_FULLR)
scroll &= ~(V2D_SCROLL_HORIZONTAL);
if (scroll & V2D_SCROLL_VERTICAL_FULLR)
scroll &= ~(V2D_SCROLL_VERTICAL);
return scroll;
}
/* called each time cur changes, to dynamically update masks */
static void view2d_masks(View2D *v2d, int check_scrollers)
{
int scroll;
/* mask - view frame */
v2d->mask.xmin = v2d->mask.ymin = 0;
v2d->mask.xmax = v2d->winx - 1; /* -1 yes! masks are pixels */
v2d->mask.ymax = v2d->winy - 1;
if (check_scrollers) {
/* check size if hiding flag is set: */
if (v2d->scroll & V2D_SCROLL_HORIZONTAL_HIDE) {
if (!(v2d->scroll & V2D_SCROLL_SCALE_HORIZONTAL)) {
if (BLI_rctf_size_x(&v2d->tot) > BLI_rctf_size_x(&v2d->cur))
v2d->scroll &= ~V2D_SCROLL_HORIZONTAL_FULLR;
else
v2d->scroll |= V2D_SCROLL_HORIZONTAL_FULLR;
}
}
if (v2d->scroll & V2D_SCROLL_VERTICAL_HIDE) {
if (!(v2d->scroll & V2D_SCROLL_SCALE_VERTICAL)) {
if (BLI_rctf_size_y(&v2d->tot) + 0.01f > BLI_rctf_size_y(&v2d->cur))
v2d->scroll &= ~V2D_SCROLL_VERTICAL_FULLR;
else
v2d->scroll |= V2D_SCROLL_VERTICAL_FULLR;
}
}
}
scroll = view2d_scroll_mapped(v2d->scroll);
/* scrollers shrink mask area, but should be based off regionsize
* - they can only be on one to two edges of the region they define
* - if they overlap, they must not occupy the corners (which are reserved for other widgets)
*/
if (scroll) {
/* vertical scroller */
if (scroll & V2D_SCROLL_LEFT) {
/* on left-hand edge of region */
v2d->vert = v2d->mask;
v2d->vert.xmax = V2D_SCROLL_WIDTH;
v2d->mask.xmin = v2d->vert.xmax + 1;
}
else if (scroll & V2D_SCROLL_RIGHT) {
/* on right-hand edge of region */
v2d->vert = v2d->mask;
v2d->vert.xmax++; /* one pixel extra... was leaving a minor gap... */
v2d->vert.xmin = v2d->vert.xmax - V2D_SCROLL_WIDTH;
v2d->mask.xmax = v2d->vert.xmin - 1;
}
/* horizontal scroller */
if (scroll & (V2D_SCROLL_BOTTOM)) {
/* on bottom edge of region */
v2d->hor = v2d->mask;
v2d->hor.ymax = V2D_SCROLL_HEIGHT;
v2d->mask.ymin = v2d->hor.ymax + 1;
}
else if (scroll & V2D_SCROLL_TOP) {
/* on upper edge of region */
v2d->hor = v2d->mask;
v2d->hor.ymin = v2d->hor.ymax - V2D_SCROLL_HEIGHT;
v2d->mask.ymax = v2d->hor.ymin - 1;
}
/* adjust vertical scroller if there's a horizontal scroller, to leave corner free */
if (scroll & V2D_SCROLL_VERTICAL) {
/* just set y min/max for vertical scroller to y min/max of mask as appropriate */
if (scroll & (V2D_SCROLL_BOTTOM)) {
/* on bottom edge of region */
v2d->vert.ymin = v2d->mask.ymin;
}
else if (scroll & V2D_SCROLL_TOP) {
/* on upper edge of region */
v2d->vert.ymax = v2d->mask.ymax;
}
}
}
}
/* Refresh and Validation */
/* Initialize all relevant View2D data (including view rects if first time) and/or refresh mask sizes after view resize
* - for some of these presets, it is expected that the region will have defined some
* additional settings necessary for the customization of the 2D viewport to its requirements
* - this function should only be called from region init() callbacks, where it is expected that
* this is called before UI_view2d_size_update(), as this one checks that the rects are properly initialized.
*/
void UI_view2d_region_reinit(View2D *v2d, short type, int winx, int winy)
{
bool tot_changed = false, do_init;
uiStyle *style = UI_GetStyle();
do_init = (v2d->flag & V2D_IS_INITIALISED) == 0;
/* see eView2D_CommonViewTypes in UI_view2d.h for available view presets */
switch (type) {
/* 'standard view' - optimum setup for 'standard' view behavior,
* that should be used new views as basis for their
* own unique View2D settings, which should be used instead of this in most cases...
*/
case V2D_COMMONVIEW_STANDARD:
{
/* for now, aspect ratio should be maintained, and zoom is clamped within sane default limits */
v2d->keepzoom = (V2D_KEEPASPECT | V2D_LIMITZOOM);
v2d->minzoom = 0.01f;
v2d->maxzoom = 1000.0f;
/* tot rect and cur should be same size, and aligned using 'standard' OpenGL coordinates for now
* - region can resize 'tot' later to fit other data
* - keeptot is only within bounds, as strict locking is not that critical
* - view is aligned for (0,0) -> (winx-1, winy-1) setup
*/
v2d->align = (V2D_ALIGN_NO_NEG_X | V2D_ALIGN_NO_NEG_Y);
v2d->keeptot = V2D_KEEPTOT_BOUNDS;
if (do_init) {
v2d->tot.xmin = v2d->tot.ymin = 0.0f;
v2d->tot.xmax = (float)(winx - 1);
v2d->tot.ymax = (float)(winy - 1);
v2d->cur = v2d->tot;
}
/* scrollers - should we have these by default? */
/* XXX for now, we don't override this, or set it either! */
break;
}
/* 'list/channel view' - zoom, aspect ratio, and alignment restrictions are set here */
case V2D_COMMONVIEW_LIST:
{
/* zoom + aspect ratio are locked */
v2d->keepzoom = (V2D_LOCKZOOM_X | V2D_LOCKZOOM_Y | V2D_LIMITZOOM | V2D_KEEPASPECT);
v2d->minzoom = v2d->maxzoom = 1.0f;
/* tot rect has strictly regulated placement, and must only occur in +/- quadrant */
v2d->align = (V2D_ALIGN_NO_NEG_X | V2D_ALIGN_NO_POS_Y);
v2d->keeptot = V2D_KEEPTOT_STRICT;
tot_changed = do_init;
/* scroller settings are currently not set here... that is left for regions... */
break;
}
/* 'stack view' - practically the same as list/channel view, except is located in the pos y half instead.
* zoom, aspect ratio, and alignment restrictions are set here */
case V2D_COMMONVIEW_STACK:
{
/* zoom + aspect ratio are locked */
v2d->keepzoom = (V2D_LOCKZOOM_X | V2D_LOCKZOOM_Y | V2D_LIMITZOOM | V2D_KEEPASPECT);
v2d->minzoom = v2d->maxzoom = 1.0f;
/* tot rect has strictly regulated placement, and must only occur in +/+ quadrant */
v2d->align = (V2D_ALIGN_NO_NEG_X | V2D_ALIGN_NO_NEG_Y);
v2d->keeptot = V2D_KEEPTOT_STRICT;
tot_changed = do_init;
/* scroller settings are currently not set here... that is left for regions... */
break;
}
/* 'header' regions - zoom, aspect ratio, alignment, and panning restrictions are set here */
case V2D_COMMONVIEW_HEADER:
{
/* zoom + aspect ratio are locked */
v2d->keepzoom = (V2D_LOCKZOOM_X | V2D_LOCKZOOM_Y | V2D_LIMITZOOM | V2D_KEEPASPECT);
v2d->minzoom = v2d->maxzoom = 1.0f;
if (do_init) {
v2d->tot.xmin = 0.0f;
v2d->tot.xmax = winx;
v2d->tot.ymin = 0.0f;
v2d->tot.ymax = winy;
v2d->cur = v2d->tot;
v2d->min[0] = v2d->max[0] = (float)(winx - 1);
v2d->min[1] = v2d->max[1] = (float)(winy - 1);
}
/* tot rect has strictly regulated placement, and must only occur in +/+ quadrant */
v2d->align = (V2D_ALIGN_NO_NEG_X | V2D_ALIGN_NO_NEG_Y);
v2d->keeptot = V2D_KEEPTOT_STRICT;
tot_changed = do_init;
/* panning in y-axis is prohibited */
v2d->keepofs = V2D_LOCKOFS_Y;
/* absolutely no scrollers allowed */
v2d->scroll = 0;
break;
}
/* panels view, with horizontal/vertical align */
case V2D_COMMONVIEW_PANELS_UI:
{
/* for now, aspect ratio should be maintained, and zoom is clamped within sane default limits */
v2d->keepzoom = (V2D_KEEPASPECT | V2D_LIMITZOOM | V2D_KEEPZOOM);
v2d->minzoom = 0.5f;
v2d->maxzoom = 2.0f;
v2d->align = (V2D_ALIGN_NO_NEG_X | V2D_ALIGN_NO_POS_Y);
v2d->keeptot = V2D_KEEPTOT_BOUNDS;
/* note, scroll is being flipped in ED_region_panels() drawing */
v2d->scroll |= V2D_SCROLL_HORIZONTAL_HIDE;
v2d->scroll |= V2D_SCROLL_VERTICAL_HIDE;
if (do_init) {
float panelzoom = (style) ? style->panelzoom : 1.0f;
float scrolw = v2d->scroll & V2D_SCROLL_RIGHT ? V2D_SCROLL_WIDTH : 0.0f;
v2d->tot.xmin = 0.0f;
v2d->tot.xmax = winx - scrolw;
v2d->tot.ymax = 0.0f;
v2d->tot.ymin = -winy;
v2d->cur.xmin = 0.0f;
v2d->cur.xmax = (winx) * panelzoom - scrolw;
v2d->cur.ymax = 0.0f;
v2d->cur.ymin = (-winy) * panelzoom;
}
break;
}
/* other view types are completely defined using their own settings already */
default:
/* we don't do anything here, as settings should be fine, but just make sure that rect */
break;
}
/* set initialized flag so that View2D doesn't get reinitialised next time again */
v2d->flag |= V2D_IS_INITIALISED;
/* store view size */
v2d->winx = winx;
v2d->winy = winy;
/* set masks (always do), but leave scroller scheck to totrect_set */
view2d_masks(v2d, 0);
/* set 'tot' rect before setting cur? */
/* XXX confusing stuff here still - I made this function not check scroller hide - that happens in totrect_set */
if (tot_changed)
UI_view2d_totRect_set_resize(v2d, winx, winy, !do_init);
else
ui_view2d_curRect_validate_resize(v2d, !do_init, 0);
}
/* Ensure View2D rects remain in a viable configuration
* - cur is not allowed to be: larger than max, smaller than min, or outside of tot
*/
// XXX pre2.5 -> this used to be called test_view2d()
static void ui_view2d_curRect_validate_resize(View2D *v2d, int resize, int mask_scrollers)
{
float totwidth, totheight, curwidth, curheight, width, height;
float winx, winy;
rctf *cur, *tot;
/* use mask as size of region that View2D resides in, as it takes into account scrollbars already */
winx = (float)(BLI_rcti_size_x(&v2d->mask) + 1);
winy = (float)(BLI_rcti_size_y(&v2d->mask) + 1);
/* get pointers to rcts for less typing */
cur = &v2d->cur;
tot = &v2d->tot;
/* we must satisfy the following constraints (in decreasing order of importance):
* - alignment restrictions are respected
* - cur must not fall outside of tot
* - axis locks (zoom and offset) must be maintained
* - zoom must not be excessive (check either sizes or zoom values)
* - aspect ratio should be respected (NOTE: this is quite closely related to zoom too)
*/
/* Step 1: if keepzoom, adjust the sizes of the rects only
* - firstly, we calculate the sizes of the rects
* - curwidth and curheight are saved as reference... modify width and height values here
*/
totwidth = BLI_rctf_size_x(tot);
totheight = BLI_rctf_size_y(tot);
curwidth = width = BLI_rctf_size_x(cur);
curheight = height = BLI_rctf_size_y(cur);
/* if zoom is locked, size on the appropriate axis is reset to mask size */
if (v2d->keepzoom & V2D_LOCKZOOM_X)
width = winx;
if (v2d->keepzoom & V2D_LOCKZOOM_Y)
height = winy;
/* values used to divide, so make it safe
* NOTE: width and height must use FLT_MIN instead of 1, otherwise it is impossible to
* get enough resolution in Graph Editor for editing some curves
*/
if (width < FLT_MIN) width = 1;
if (height < FLT_MIN) height = 1;
if (winx < 1) winx = 1;
if (winy < 1) winy = 1;
/* V2D_LIMITZOOM indicates that zoom level should be preserved when the window size changes */
if (resize && (v2d->keepzoom & V2D_KEEPZOOM)) {
float zoom, oldzoom;
if ((v2d->keepzoom & V2D_LOCKZOOM_X) == 0) {
zoom = winx / width;
oldzoom = v2d->oldwinx / curwidth;
if (oldzoom != zoom)
width *= zoom / oldzoom;
}
if ((v2d->keepzoom & V2D_LOCKZOOM_Y) == 0) {
zoom = winy / height;
oldzoom = v2d->oldwiny / curheight;
if (oldzoom != zoom)
height *= zoom / oldzoom;
}
}
/* keepzoom (V2D_LIMITZOOM set), indicates that zoom level on each axis must not exceed limits
* NOTE: in general, it is not expected that the lock-zoom will be used in conjunction with this
*/
else if (v2d->keepzoom & V2D_LIMITZOOM) {
/* check if excessive zoom on x-axis */
if ((v2d->keepzoom & V2D_LOCKZOOM_X) == 0) {
const float zoom = winx / width;
if (zoom < v2d->minzoom) {
width = winx / v2d->minzoom;
}
else if (zoom > v2d->maxzoom) {
width = winx / v2d->maxzoom;
}
}
/* check if excessive zoom on y-axis */
if ((v2d->keepzoom & V2D_LOCKZOOM_Y) == 0) {
const float zoom = winy / height;
if (zoom < v2d->minzoom) {
height = winy / v2d->minzoom;
}
else if (zoom > v2d->maxzoom) {
height = winy / v2d->maxzoom;
}
}
}
else {
/* make sure sizes don't exceed that of the min/max sizes (even though we're not doing zoom clamping) */
CLAMP(width, v2d->min[0], v2d->max[0]);
CLAMP(height, v2d->min[1], v2d->max[1]);
}
/* check if we should restore aspect ratio (if view size changed) */
if (v2d->keepzoom & V2D_KEEPASPECT) {
bool do_x = false, do_y = false, do_cur /* , do_win */ /* UNUSED */;
float /* curRatio, */ /* UNUSED */ winRatio;
/* when a window edge changes, the aspect ratio can't be used to
* find which is the best new 'cur' rect. thats why it stores 'old'
*/
if (winx != v2d->oldwinx) do_x = true;
if (winy != v2d->oldwiny) do_y = true;
/* curRatio = height / width; */ /* UNUSED */
winRatio = winy / winx;
/* both sizes change (area/region maximized) */
if (do_x == do_y) {
if (do_x && do_y) {
/* here is 1,1 case, so all others must be 0,0 */
if (fabsf(winx - v2d->oldwinx) > fabsf(winy - v2d->oldwiny)) do_y = false;
else do_x = false;
}
else if (winRatio > 1.0f) {
do_x = false;
}
else {
do_x = true;
}
}
do_cur = do_x;
/* do_win = do_y; */ /* UNUSED */
if (do_cur) {
if ((v2d->keeptot == V2D_KEEPTOT_STRICT) && (winx != v2d->oldwinx)) {
/* special exception for Outliner (and later channel-lists):
* - The view may be moved left to avoid contents being pushed out of view when view shrinks.
* - The keeptot code will make sure cur->xmin will not be less than tot->xmin (which cannot be allowed)
* - width is not adjusted for changed ratios here...
*/
if (winx < v2d->oldwinx) {
float temp = v2d->oldwinx - winx;
cur->xmin -= temp;
cur->xmax -= temp;
/* width does not get modified, as keepaspect here is just set to make
* sure visible area adjusts to changing view shape!
*/
}
}
else {
/* portrait window: correct for x */
width = height / winRatio;
}
}
else {
if ((v2d->keeptot == V2D_KEEPTOT_STRICT) && (winy != v2d->oldwiny)) {
/* special exception for Outliner (and later channel-lists):
* - Currently, no actions need to be taken here...
*/
if (winy < v2d->oldwiny) {
float temp = v2d->oldwiny - winy;
if (v2d->align & V2D_ALIGN_NO_NEG_Y) {
cur->ymin -= temp;
cur->ymax -= temp;
}
else { /* Assume V2D_ALIGN_NO_POS_Y or combination */
cur->ymin += temp;
cur->ymax += temp;
}
}
}
else {
/* landscape window: correct for y */
height = width * winRatio;
}
}
/* store region size for next time */
v2d->oldwinx = (short)winx;
v2d->oldwiny = (short)winy;
}
/* Step 2: apply new sizes to cur rect, but need to take into account alignment settings here... */
if ((width != curwidth) || (height != curheight)) {
float temp, dh;
/* resize from centerpoint, unless otherwise specified */
if (width != curwidth) {
if (v2d->keepofs & V2D_LOCKOFS_X) {
cur->xmax += width - BLI_rctf_size_x(cur);
}
else if (v2d->keepofs & V2D_KEEPOFS_X) {
if (v2d->align & V2D_ALIGN_NO_POS_X)
cur->xmin -= width - BLI_rctf_size_x(cur);
else
cur->xmax += width - BLI_rctf_size_x(cur);
}
else {
temp = BLI_rctf_cent_x(cur);
dh = width * 0.5f;
cur->xmin = temp - dh;
cur->xmax = temp + dh;
}
}
if (height != curheight) {
if (v2d->keepofs & V2D_LOCKOFS_Y) {
cur->ymax += height - BLI_rctf_size_y(cur);
}
else if (v2d->keepofs & V2D_KEEPOFS_Y) {
if (v2d->align & V2D_ALIGN_NO_POS_Y)
cur->ymin -= height - BLI_rctf_size_y(cur);
else
cur->ymax += height - BLI_rctf_size_y(cur);
}
else {
temp = BLI_rctf_cent_y(cur);
dh = height * 0.5f;
cur->ymin = temp - dh;
cur->ymax = temp + dh;
}
}
}
/* Step 3: adjust so that it doesn't fall outside of bounds of 'tot' */
if (v2d->keeptot) {
float temp, diff;
/* recalculate extents of cur */
curwidth = BLI_rctf_size_x(cur);
curheight = BLI_rctf_size_y(cur);
/* width */
if ((curwidth > totwidth) && !(v2d->keepzoom & (V2D_KEEPZOOM | V2D_LOCKZOOM_X | V2D_LIMITZOOM))) {
/* if zoom doesn't have to be maintained, just clamp edges */
if (cur->xmin < tot->xmin) cur->xmin = tot->xmin;
if (cur->xmax > tot->xmax) cur->xmax = tot->xmax;
}
else if (v2d->keeptot == V2D_KEEPTOT_STRICT) {
/* This is an exception for the outliner (and later channel-lists, headers)
* - must clamp within tot rect (absolutely no excuses)
* --> therefore, cur->xmin must not be less than tot->xmin
*/
if (cur->xmin < tot->xmin) {
/* move cur across so that it sits at minimum of tot */
temp = tot->xmin - cur->xmin;
cur->xmin += temp;
cur->xmax += temp;
}
else if (cur->xmax > tot->xmax) {
/* - only offset by difference of cur-xmax and tot-xmax if that would not move
* cur-xmin to lie past tot-xmin
* - otherwise, simply shift to tot-xmin???
*/
temp = cur->xmax - tot->xmax;
if ((cur->xmin - temp) < tot->xmin) {
/* only offset by difference from cur-min and tot-min */
temp = cur->xmin - tot->xmin;
cur->xmin -= temp;
cur->xmax -= temp;
}
else {
cur->xmin -= temp;
cur->xmax -= temp;
}
}
}
else {
/* This here occurs when:
* - width too big, but maintaining zoom (i.e. widths cannot be changed)
* - width is OK, but need to check if outside of boundaries
*
* So, resolution is to just shift view by the gap between the extremities.
* We favour moving the 'minimum' across, as that's origin for most things
* (XXX - in the past, max was favored... if there are bugs, swap!)
*/
if ((cur->xmin < tot->xmin) && (cur->xmax > tot->xmax)) {
/* outside boundaries on both sides, so take middle-point of tot, and place in balanced way */
temp = BLI_rctf_cent_x(tot);
diff = curwidth * 0.5f;
cur->xmin = temp - diff;
cur->xmax = temp + diff;
}
else if (cur->xmin < tot->xmin) {
/* move cur across so that it sits at minimum of tot */
temp = tot->xmin - cur->xmin;
cur->xmin += temp;
cur->xmax += temp;
}
else if (cur->xmax > tot->xmax) {
/* - only offset by difference of cur-xmax and tot-xmax if that would not move
* cur-xmin to lie past tot-xmin
* - otherwise, simply shift to tot-xmin???
*/
temp = cur->xmax - tot->xmax;
if ((cur->xmin - temp) < tot->xmin) {
/* only offset by difference from cur-min and tot-min */
temp = cur->xmin - tot->xmin;
cur->xmin -= temp;
cur->xmax -= temp;
}
else {
cur->xmin -= temp;
cur->xmax -= temp;
}
}
}
/* height */
if ((curheight > totheight) && !(v2d->keepzoom & (V2D_KEEPZOOM | V2D_LOCKZOOM_Y | V2D_LIMITZOOM))) {
/* if zoom doesn't have to be maintained, just clamp edges */
if (cur->ymin < tot->ymin) cur->ymin = tot->ymin;
if (cur->ymax > tot->ymax) cur->ymax = tot->ymax;
}
else {
/* This here occurs when:
* - height too big, but maintaining zoom (i.e. heights cannot be changed)
* - height is OK, but need to check if outside of boundaries
*
* So, resolution is to just shift view by the gap between the extremities.
* We favour moving the 'minimum' across, as that's origin for most things
*/
if ((cur->ymin < tot->ymin) && (cur->ymax > tot->ymax)) {
/* outside boundaries on both sides, so take middle-point of tot, and place in balanced way */
temp = BLI_rctf_cent_y(tot);
diff = curheight * 0.5f;
cur->ymin = temp - diff;
cur->ymax = temp + diff;
}
else if (cur->ymin < tot->ymin) {
/* there's still space remaining, so shift up */
temp = tot->ymin - cur->ymin;
cur->ymin += temp;
cur->ymax += temp;
}
else if (cur->ymax > tot->ymax) {
/* there's still space remaining, so shift down */
temp = cur->ymax - tot->ymax;
cur->ymin -= temp;
cur->ymax -= temp;
}
}
}
/* Step 4: Make sure alignment restrictions are respected */
if (v2d->align) {
/* If alignment flags are set (but keeptot is not), they must still be respected, as although
* they don't specify any particular bounds to stay within, they do define ranges which are
* invalid.
*
* Here, we only check to make sure that on each axis, the 'cur' rect doesn't stray into these
* invalid zones, otherwise we offset.
*/
/* handle width - 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)) {
/* width is in negative-x half */
if (v2d->cur.xmax > 0) {
v2d->cur.xmin -= v2d->cur.xmax;
v2d->cur.xmax = 0.0f;
}
}
else if ((v2d->align & V2D_ALIGN_NO_NEG_X) && !(v2d->align & V2D_ALIGN_NO_POS_X)) {
/* width is in positive-x half */
if (v2d->cur.xmin < 0) {
v2d->cur.xmax -= v2d->cur.xmin;
v2d->cur.xmin = 0.0f;
}
}
/* handle height - 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)) {
/* height is in negative-y half */
if (v2d->cur.ymax > 0) {
v2d->cur.ymin -= v2d->cur.ymax;
v2d->cur.ymax = 0.0f;
}
}
else if ((v2d->align & V2D_ALIGN_NO_NEG_Y) && !(v2d->align & V2D_ALIGN_NO_POS_Y)) {
/* height is in positive-y half */
if (v2d->cur.ymin < 0) {
v2d->cur.ymax -= v2d->cur.ymin;
v2d->cur.ymin = 0.0f;
}
}
}
/* set masks */
view2d_masks(v2d, mask_scrollers);
}
void UI_view2d_curRect_validate(View2D *v2d)
{
ui_view2d_curRect_validate_resize(v2d, 0, 1);
}
/* ------------------ */
/* Called by menus to activate it, or by view2d operators to make sure 'related' views stay in synchrony */
void UI_view2d_sync(bScreen *screen, ScrArea *area, View2D *v2dcur, int flag)
{
ScrArea *sa;
ARegion *ar;
/* don't continue if no view syncing to be done */
if ((v2dcur->flag & (V2D_VIEWSYNC_SCREEN_TIME | V2D_VIEWSYNC_AREA_VERTICAL)) == 0)
return;
/* check if doing within area syncing (i.e. channels/vertical) */
if ((v2dcur->flag & V2D_VIEWSYNC_AREA_VERTICAL) && (area)) {
for (ar = area->regionbase.first; ar; ar = ar->next) {
/* don't operate on self */
if (v2dcur != &ar->v2d) {
/* only if view has vertical locks enabled */
if (ar->v2d.flag & V2D_VIEWSYNC_AREA_VERTICAL) {
if (flag == V2D_LOCK_COPY) {
/* other views with locks on must copy active */
ar->v2d.cur.ymin = v2dcur->cur.ymin;
ar->v2d.cur.ymax = v2dcur->cur.ymax;
}
else { /* V2D_LOCK_SET */
/* active must copy others */
v2dcur->cur.ymin = ar->v2d.cur.ymin;
v2dcur->cur.ymax = ar->v2d.cur.ymax;
}
/* region possibly changed, so refresh */
ED_region_tag_redraw(ar);
}
}
}
}
/* check if doing whole screen syncing (i.e. time/horizontal) */
if ((v2dcur->flag & V2D_VIEWSYNC_SCREEN_TIME) && (screen)) {
for (sa = screen->areabase.first; sa; sa = sa->next) {
for (ar = sa->regionbase.first; ar; ar = ar->next) {
/* don't operate on self */
if (v2dcur != &ar->v2d) {
/* only if view has horizontal locks enabled */
if (ar->v2d.flag & V2D_VIEWSYNC_SCREEN_TIME) {
if (flag == V2D_LOCK_COPY) {
/* other views with locks on must copy active */
ar->v2d.cur.xmin = v2dcur->cur.xmin;
ar->v2d.cur.xmax = v2dcur->cur.xmax;
}
else { /* V2D_LOCK_SET */
/* active must copy others */
v2dcur->cur.xmin = ar->v2d.cur.xmin;
v2dcur->cur.xmax = ar->v2d.cur.xmax;
}
/* region possibly changed, so refresh */
ED_region_tag_redraw(ar);
}
}
}
}
}
}
/* Restore 'cur' rect to standard orientation (i.e. optimal maximum view of tot)
* This does not take into account if zooming the view on an axis will improve the view (if allowed)
*/
void UI_view2d_curRect_reset(View2D *v2d)
{
float width, height;
/* assume width and height of 'cur' rect by default, should be same size as mask */
width = (float)(BLI_rcti_size_x(&v2d->mask) + 1);
height = (float)(BLI_rcti_size_y(&v2d->mask) + 1);
/* handle width - 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)) {
/* width is in negative-x half */
v2d->cur.xmin = -width;
v2d->cur.xmax = 0.0f;
}
else if ((v2d->align & V2D_ALIGN_NO_NEG_X) && !(v2d->align & V2D_ALIGN_NO_POS_X)) {
/* width is in positive-x half */
v2d->cur.xmin = 0.0f;
v2d->cur.xmax = width;
}
else {
/* width is centered around (x == 0) */
const float dx = width / 2.0f;
v2d->cur.xmin = -dx;
v2d->cur.xmax = dx;
}
/* handle height - 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)) {
/* height is in negative-y half */
v2d->cur.ymin = -height;
v2d->cur.ymax = 0.0f;
}
else if ((v2d->align & V2D_ALIGN_NO_NEG_Y) && !(v2d->align & V2D_ALIGN_NO_POS_Y)) {
/* height is in positive-y half */
v2d->cur.ymin = 0.0f;
v2d->cur.ymax = height;
}
else {
/* height is centered around (y == 0) */
const float dy = height / 2.0f;
v2d->cur.ymin = -dy;
v2d->cur.ymax = dy;
}
}
/* ------------------ */
/* Change the size of the maximum viewable area (i.e. 'tot' rect) */
void UI_view2d_totRect_set_resize(View2D *v2d, int width, int height, int resize)
{
// int scroll = view2d_scroll_mapped(v2d->scroll);
/* don't do anything if either value is 0 */
width = abs(width);
height = abs(height);
/* hrumf! */
/* XXX: there are work arounds for this in the panel and file browse code. */
/* round to int, because this is called with width + V2D_SCROLL_WIDTH */
// if (scroll & V2D_SCROLL_HORIZONTAL)
// width -= (int)V2D_SCROLL_WIDTH;
// if (scroll & V2D_SCROLL_VERTICAL)
// height -= (int)V2D_SCROLL_HEIGHT;
if (ELEM(0, width, height)) {
if (G.debug & G_DEBUG)
printf("Error: View2D totRect set exiting: v2d=%p width=%d height=%d\n", (void *)v2d, width, height); // XXX temp debug info
return;
}
/* handle width - 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)) {
/* width is in negative-x half */
v2d->tot.xmin = (float)-width;
v2d->tot.xmax = 0.0f;
}
else if ((v2d->align & V2D_ALIGN_NO_NEG_X) && !(v2d->align & V2D_ALIGN_NO_POS_X)) {
/* width is in positive-x half */
v2d->tot.xmin = 0.0f;
v2d->tot.xmax = (float)width;
}
else {
/* width is centered around (x == 0) */
const float dx = (float)width / 2.0f;
v2d->tot.xmin = -dx;
v2d->tot.xmax = dx;
}
/* handle height - 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)) {
/* height is in negative-y half */
v2d->tot.ymin = (float)-height;
v2d->tot.ymax = 0.0f;
}
else if ((v2d->align & V2D_ALIGN_NO_NEG_Y) && !(v2d->align & V2D_ALIGN_NO_POS_Y)) {
/* height is in positive-y half */
v2d->tot.ymin = 0.0f;
v2d->tot.ymax = (float)height;
}
else {
/* height is centered around (y == 0) */
const float dy = (float)height / 2.0f;
v2d->tot.ymin = -dy;
v2d->tot.ymax = dy;
}
/* make sure that 'cur' rect is in a valid state as a result of these changes */
ui_view2d_curRect_validate_resize(v2d, resize, 1);
}
void UI_view2d_totRect_set(View2D *v2d, int width, int height)
{
int scroll = view2d_scroll_mapped(v2d->scroll);
UI_view2d_totRect_set_resize(v2d, width, height, 0);
/* solve bad recursion... if scroller state changed, mask is different, so you get different rects */
if (scroll != view2d_scroll_mapped(v2d->scroll)) {
UI_view2d_totRect_set_resize(v2d, width, height, 0);
}
}
bool UI_view2d_tab_set(View2D *v2d, int tab)
{
float default_offset[2] = {0.0f, 0.0f};
float *offset, *new_offset;
bool changed = false;
/* if tab changed, change offset */
if (tab != v2d->tab_cur && v2d->tab_offset) {
if (tab < v2d->tab_num)
offset = &v2d->tab_offset[tab * 2];
else
offset = default_offset;
v2d->cur.xmax += offset[0] - v2d->cur.xmin;
v2d->cur.xmin = offset[0];
v2d->cur.ymin += offset[1] - v2d->cur.ymax;
v2d->cur.ymax = offset[1];
/* validation should happen in subsequent totRect_set */
changed = true;
}
/* resize array if needed */
if (tab >= v2d->tab_num) {
new_offset = MEM_callocN(sizeof(float) * (tab + 1) * 2, "view2d tab offset");
if (v2d->tab_offset) {
memcpy(new_offset, v2d->tab_offset, sizeof(float) * v2d->tab_num * 2);
MEM_freeN(v2d->tab_offset);
}
v2d->tab_offset = new_offset;
v2d->tab_num = tab + 1;
}
/* set current tab and offset */
v2d->tab_cur = tab;
v2d->tab_offset[2 * tab + 0] = v2d->cur.xmin;
v2d->tab_offset[2 * tab + 1] = v2d->cur.ymax;
return changed;
}
void UI_view2d_zoom_cache_reset(void)
{
/* While scaling we can accumulate fonts at many sizes (~20 or so).
* Not an issue with embedded font, but can use over 500Mb with i18n ones! See [#38244]. */
/* note: only some views draw text, we could check for this case to avoid clearning cache */
BLF_cache_clear();
}
/* *********************************************************************** */
/* View Matrix Setup */
/* mapping function to ensure 'cur' draws extended over the area where sliders are */
static void view2d_map_cur_using_mask(View2D *v2d, rctf *curmasked)
{
*curmasked = v2d->cur;
if (view2d_scroll_mapped(v2d->scroll)) {
float sizex = BLI_rcti_size_x(&v2d->mask);
float sizey = BLI_rcti_size_y(&v2d->mask);
/* prevent tiny or narrow regions to get invalid coordinates - mask can get negative even... */
if (sizex > 0.0f && sizey > 0.0f) {
float dx = BLI_rctf_size_x(&v2d->cur) / (sizex + 1);
float dy = BLI_rctf_size_y(&v2d->cur) / (sizey + 1);
if (v2d->mask.xmin != 0)
curmasked->xmin -= dx * (float)v2d->mask.xmin;
if (v2d->mask.xmax + 1 != v2d->winx)
curmasked->xmax += dx * (float)(v2d->winx - v2d->mask.xmax - 1);
if (v2d->mask.ymin != 0)
curmasked->ymin -= dy * (float)v2d->mask.ymin;
if (v2d->mask.ymax + 1 != v2d->winy)
curmasked->ymax += dy * (float)(v2d->winy - v2d->mask.ymax - 1);
}
}
}
/* Set view matrices to use 'cur' rect as viewing frame for View2D drawing */
void UI_view2d_view_ortho(View2D *v2d)
{
rctf curmasked;
const int sizex = BLI_rcti_size_x(&v2d->mask);
const int sizey = BLI_rcti_size_y(&v2d->mask);
const float eps = 0.001f;
float xofs = 0.0f, yofs = 0.0f;
/* pixel offsets (-GLA_PIXEL_OFS) are needed to get 1:1 correspondence with pixels for smooth UI drawing,
* but only applied where requested
*/
/* XXX brecht: instead of zero at least use a tiny offset, otherwise
* pixel rounding is effectively random due to float inaccuracy */
if (sizex > 0)
xofs = eps * BLI_rctf_size_x(&v2d->cur) / sizex;
if (sizey > 0)
yofs = eps * BLI_rctf_size_y(&v2d->cur) / sizey;
/* apply mask-based adjustments to cur rect (due to scrollers), to eliminate scaling artifacts */
view2d_map_cur_using_mask(v2d, &curmasked);
BLI_rctf_translate(&curmasked, -xofs, -yofs);
/* XXX ton: this flag set by outliner, for icons */
if (v2d->flag & V2D_PIXELOFS_X) {
curmasked.xmin = floorf(curmasked.xmin) - (eps + xofs);
curmasked.xmax = floorf(curmasked.xmax) - (eps + xofs);
}
if (v2d->flag & V2D_PIXELOFS_Y) {
curmasked.ymin = floorf(curmasked.ymin) - (eps + yofs);
curmasked.ymax = floorf(curmasked.ymax) - (eps + yofs);
}
/* set matrix on all appropriate axes */
wmOrtho2(curmasked.xmin, curmasked.xmax, curmasked.ymin, curmasked.ymax);
/* XXX is this necessary? */
glLoadIdentity();
}
/* Set view matrices to only use one axis of 'cur' only
* - xaxis = if non-zero, only use cur x-axis, otherwise use cur-yaxis (mostly this will be used for x)
*/
void UI_view2d_view_orthoSpecial(ARegion *ar, View2D *v2d, short xaxis)
{
rctf curmasked;
float xofs, yofs;
/* pixel offsets (-GLA_PIXEL_OFS) are needed to get 1:1 correspondence with pixels for smooth UI drawing,
* but only applied where requested
*/
/* XXX temp (ton) */
xofs = 0.0f; // (v2d->flag & V2D_PIXELOFS_X) ? GLA_PIXEL_OFS : 0.0f;
yofs = 0.0f; // (v2d->flag & V2D_PIXELOFS_Y) ? GLA_PIXEL_OFS : 0.0f;
/* apply mask-based adjustments to cur rect (due to scrollers), to eliminate scaling artifacts */
view2d_map_cur_using_mask(v2d, &curmasked);
/* only set matrix with 'cur' coordinates on relevant axes */
if (xaxis)
wmOrtho2(curmasked.xmin - xofs, curmasked.xmax - xofs, -yofs, ar->winy - yofs);
else
wmOrtho2(-xofs, ar->winx - xofs, curmasked.ymin - yofs, curmasked.ymax - yofs);
/* XXX is this necessary? */
glLoadIdentity();
}
/* Restore view matrices after drawing */
void UI_view2d_view_restore(const bContext *C)
{
ARegion *ar = CTX_wm_region(C);
int width = BLI_rcti_size_x(&ar->winrct) + 1;
int height = BLI_rcti_size_y(&ar->winrct) + 1;
wmOrtho2(0.0f, (float)width, 0.0f, (float)height);
glLoadIdentity();
// ED_region_pixelspace(CTX_wm_region(C));
}
/* *********************************************************************** */
/* Gridlines */
/* View2DGrid is typedef'd in UI_view2d.h */
struct View2DGrid {
float dx, dy; /* stepsize (in pixels) between gridlines */
float startx, starty; /* initial coordinates to start drawing grid from */
int powerx, powery; /* step as power of 10 */
};
/* --------------- */
/* try to write step as a power of 10 */
static void step_to_grid(float *step, int *power, int unit)
{
const float loga = (float)log10(*step);
float rem;
*power = (int)(loga);
rem = loga - (*power);
rem = (float)pow(10.0, rem);
if (loga < 0.0f) {
if (rem < 0.2f) rem = 0.2f;
else if (rem < 0.5f) rem = 0.5f;
else rem = 1.0f;
*step = rem * (float)pow(10.0, (*power));
/* for frames, we want 1.0 frame intervals only */
if (unit == V2D_UNIT_FRAMES) {
rem = 1.0f;
*step = 2.0f; /* use 2 since there are grid lines drawn in between, this way to get 1 line per frane */
}
/* prevents printing 1.0 2.0 3.0 etc */
if (rem == 1.0f) (*power)++;
}
else {
if (rem < 2.0f) rem = 2.0f;
else if (rem < 5.0f) rem = 5.0f;
else rem = 10.0f;
*step = rem * (float)pow(10.0, (*power));
(*power)++;
/* prevents printing 1.0, 2.0, 3.0, etc. */
if (rem == 10.0f) (*power)++;
}
}
/* Initialize settings necessary for drawing gridlines in a 2d-view
* - Currently, will return pointer to View2DGrid struct that needs to
* be freed with UI_view2d_grid_free()
* - Is used for scrollbar drawing too (for units drawing)
* - Units + clamping args will be checked, to make sure they are valid values that can be used
* so it is very possible that we won't return grid at all!
*
* - xunits,yunits = V2D_UNIT_* grid steps in seconds or frames
* - xclamp,yclamp = V2D_CLAMP_* only show whole-number intervals
* - winx = width of region we're drawing to, note: not used but keeping for completeness.
* - winy = height of region we're drawing into
*/
View2DGrid *UI_view2d_grid_calc(Scene *scene, View2D *v2d,
short xunits, short xclamp, short yunits, short yclamp, int UNUSED(winx), int winy)
{
View2DGrid *grid;
float space, pixels, seconddiv;
/* check that there are at least some workable args */
if (ELEM(V2D_ARG_DUMMY, xunits, xclamp) && ELEM(V2D_ARG_DUMMY, yunits, yclamp))
return NULL;
/* grid here is allocated... */
grid = MEM_callocN(sizeof(View2DGrid), "View2DGrid");
/* rule: gridstep is minimal GRIDSTEP pixels */
if (xunits == V2D_UNIT_SECONDS) {
seconddiv = (float)(0.01 * FPS);
}
else {
seconddiv = 1.0f;
}
/* calculate x-axis grid scale (only if both args are valid) */
if (ELEM(V2D_ARG_DUMMY, xunits, xclamp) == 0) {
space = BLI_rctf_size_x(&v2d->cur);
pixels = (float)BLI_rcti_size_x(&v2d->mask);
if (pixels != 0.0f) {
grid->dx = (U.v2d_min_gridsize * UI_DPI_FAC * space) / (seconddiv * pixels);
step_to_grid(&grid->dx, &grid->powerx, xunits);
grid->dx *= seconddiv;
}
if (xclamp == V2D_GRID_CLAMP) {
if (grid->dx < 0.1f) grid->dx = 0.1f;
grid->powerx -= 2;
if (grid->powerx < -2) grid->powerx = -2;
}
}
/* calculate y-axis grid scale (only if both args are valid) */
if (ELEM(V2D_ARG_DUMMY, yunits, yclamp) == 0) {
space = BLI_rctf_size_y(&v2d->cur);
pixels = (float)winy;
grid->dy = U.v2d_min_gridsize * UI_DPI_FAC * space / pixels;
step_to_grid(&grid->dy, &grid->powery, yunits);
if (yclamp == V2D_GRID_CLAMP) {
if (grid->dy < 1.0f) grid->dy = 1.0f;
if (grid->powery < 1) grid->powery = 1;
}
}
/* calculate start position */
if (ELEM(V2D_ARG_DUMMY, xunits, xclamp) == 0) {
grid->startx = seconddiv * (v2d->cur.xmin / seconddiv - (float)fmod(v2d->cur.xmin / seconddiv, grid->dx / seconddiv));
if (v2d->cur.xmin < 0.0f) grid->startx -= grid->dx;
}
else
grid->startx = v2d->cur.xmin;
if (ELEM(V2D_ARG_DUMMY, yunits, yclamp) == 0) {
grid->starty = (v2d->cur.ymin - (float)fmod(v2d->cur.ymin, grid->dy));
if (v2d->cur.ymin < 0.0f) grid->starty -= grid->dy;
}
else
grid->starty = v2d->cur.ymin;
return grid;
}
/* Draw gridlines in the given 2d-region */
void UI_view2d_grid_draw(View2D *v2d, View2DGrid *grid, int flag)
{
float vec1[2], vec2[2];
int a, step;
/* check for grid first, as it may not exist */
if (grid == NULL)
return;
/* vertical lines */
if (flag & V2D_VERTICAL_LINES) {
/* initialize initial settings */
vec1[0] = vec2[0] = grid->startx;
vec1[1] = grid->starty;
vec2[1] = v2d->cur.ymax;
/* minor gridlines */
step = (BLI_rcti_size_x(&v2d->mask) + 1) / (U.v2d_min_gridsize * UI_DPI_FAC);
UI_ThemeColor(TH_GRID);
for (a = 0; a < step; a++) {
glBegin(GL_LINE_STRIP);
glVertex2fv(vec1);
glVertex2fv(vec2);
glEnd();
vec2[0] = vec1[0] += grid->dx;
}
/* major gridlines */
vec2[0] = vec1[0] -= 0.5f * grid->dx;
UI_ThemeColorShade(TH_GRID, 16);
step++;
for (a = 0; a <= step; a++) {
glBegin(GL_LINE_STRIP);
glVertex2fv(vec1);
glVertex2fv(vec2);
glEnd();
vec2[0] = vec1[0] -= grid->dx;
}
}
/* horizontal lines */
if (flag & V2D_HORIZONTAL_LINES) {
/* only major gridlines */
vec1[1] = vec2[1] = grid->starty;
vec1[0] = grid->startx;
vec2[0] = v2d->cur.xmax;
step = (BLI_rcti_size_y(&v2d->mask) + 1) / (U.v2d_min_gridsize * UI_DPI_FAC);
UI_ThemeColor(TH_GRID);
for (a = 0; a <= step; a++) {
glBegin(GL_LINE_STRIP);
glVertex2fv(vec1);
glVertex2fv(vec2);
glEnd();
vec2[1] = vec1[1] += grid->dy;
}
/* fine grid lines */
vec2[1] = vec1[1] -= 0.5f * grid->dy;
step++;
if (flag & V2D_HORIZONTAL_FINELINES) {
UI_ThemeColorShade(TH_GRID, 16);
for (a = 0; a < step; a++) {
glBegin(GL_LINE_STRIP);
glVertex2fv(vec1);
glVertex2fv(vec2);
glEnd();
vec2[1] = vec1[1] -= grid->dy;
}
}
}
/* Axes are drawn as darker lines */
UI_ThemeColorShade(TH_GRID, -50);
/* horizontal axis */
if (flag & V2D_HORIZONTAL_AXIS) {
vec1[0] = v2d->cur.xmin;
vec2[0] = v2d->cur.xmax;
vec1[1] = vec2[1] = 0.0f;
glBegin(GL_LINE_STRIP);
glVertex2fv(vec1);
glVertex2fv(vec2);
glEnd();
}
/* vertical axis */
if (flag & V2D_VERTICAL_AXIS) {
vec1[1] = v2d->cur.ymin;
vec2[1] = v2d->cur.ymax;
vec1[0] = vec2[0] = 0.0f;
glBegin(GL_LINE_STRIP);
glVertex2fv(vec1);
glVertex2fv(vec2);
glEnd();
}
}
/* Draw a constant grid in given 2d-region */
void UI_view2d_constant_grid_draw(View2D *v2d)
{
float start, step = 25.0f;
UI_ThemeColorShade(TH_BACK, -10);
start = v2d->cur.xmin - (float)fmod(v2d->cur.xmin, step);
glBegin(GL_LINES);
for (; start < v2d->cur.xmax; start += step) {
glVertex2f(start, v2d->cur.ymin);
glVertex2f(start, v2d->cur.ymax);
}
start = v2d->cur.ymin - (float)fmod(v2d->cur.ymin, step);
for (; start < v2d->cur.ymax; start += step) {
glVertex2f(v2d->cur.xmin, start);
glVertex2f(v2d->cur.xmax, start);
}
/* X and Y axis */
UI_ThemeColorShade(TH_BACK, -18);
glVertex2f(0.0f, v2d->cur.ymin);
glVertex2f(0.0f, v2d->cur.ymax);
glVertex2f(v2d->cur.xmin, 0.0f);
glVertex2f(v2d->cur.xmax, 0.0f);
glEnd();
}
/* Draw a multi-level grid in given 2d-region */
void UI_view2d_multi_grid_draw(View2D *v2d, int colorid, float step, int level_size, int totlevels)
{
int offset = -10;
float lstep = step;
int level;
for (level = 0; level < totlevels; ++level) {
int i;
float start;
UI_ThemeColorShade(colorid, offset);
i = (v2d->cur.xmin >= 0.0f ? -(int)(-v2d->cur.xmin / lstep) : (int)(v2d->cur.xmin / lstep));
start = i * lstep;
glBegin(GL_LINES);
for (; start < v2d->cur.xmax; start += lstep, ++i) {
if (i == 0 || (level < totlevels - 1 && i % level_size == 0))
continue;
glVertex2f(start, v2d->cur.ymin);
glVertex2f(start, v2d->cur.ymax);
}
i = (v2d->cur.ymin >= 0.0f ? -(int)(-v2d->cur.ymin / lstep) : (int)(v2d->cur.ymin / lstep));
start = i * lstep;
for (; start < v2d->cur.ymax; start += lstep, ++i) {
if (i == 0 || (level < totlevels - 1 && i % level_size == 0))
continue;
glVertex2f(v2d->cur.xmin, start);
glVertex2f(v2d->cur.xmax, start);
}
/* X and Y axis */
UI_ThemeColorShade(colorid, offset - 8);
glVertex2f(0.0f, v2d->cur.ymin);
glVertex2f(0.0f, v2d->cur.ymax);
glVertex2f(v2d->cur.xmin, 0.0f);
glVertex2f(v2d->cur.xmax, 0.0f);
glEnd();
lstep *= level_size;
offset -= 6;
}
}
/* the price we pay for not exposting structs :( */
void UI_view2d_grid_size(View2DGrid *grid, float *r_dx, float *r_dy)
{
*r_dx = grid->dx;
*r_dy = grid->dy;
}
/* free temporary memory used for drawing grid */
void UI_view2d_grid_free(View2DGrid *grid)
{
/* only free if there's a grid */
if (grid) {
MEM_freeN(grid);
}
}
/* *********************************************************************** */
/* Scrollers */
/* View2DScrollers is typedef'd in UI_view2d.h
* WARNING: the start of this struct must not change, as view2d_ops.c uses this too.
* For now, we don't need to have a separate (internal) header for structs like this...
*/
struct View2DScrollers {
/* focus bubbles */
int vert_min, vert_max; /* vertical scrollbar */
int hor_min, hor_max; /* horizontal scrollbar */
rcti hor, vert; /* exact size of slider backdrop */
int horfull, vertfull; /* set if sliders are full, we don't draw them */
/* scales */
View2DGrid *grid; /* grid for coordinate drawing */
short xunits, xclamp; /* units and clamping options for x-axis */
short yunits, yclamp; /* units and clamping options for y-axis */
};
/* Calculate relevant scroller properties */
View2DScrollers *UI_view2d_scrollers_calc(const bContext *C, View2D *v2d,
short xunits, short xclamp, short yunits, short yclamp)
{
View2DScrollers *scrollers;
rcti vert, hor;
float fac1, fac2, totsize, scrollsize;
int scroll = view2d_scroll_mapped(v2d->scroll);
int smaller;
/* scrollers is allocated here... */
scrollers = MEM_callocN(sizeof(View2DScrollers), "View2DScrollers");
vert = v2d->vert;
hor = v2d->hor;
/* slider rects need to be smaller than region */
smaller = (int)(0.2f * U.widget_unit);
hor.xmin += smaller;
hor.xmax -= smaller;
if (scroll & V2D_SCROLL_BOTTOM)
hor.ymin += smaller;
else
hor.ymax -= smaller;
if (scroll & V2D_SCROLL_LEFT)
vert.xmin += smaller;
else
vert.xmax -= smaller;
vert.ymin += smaller;
vert.ymax -= smaller;
CLAMP(vert.ymin, vert.ymin, vert.ymax - V2D_SCROLLER_HANDLE_SIZE);
CLAMP(hor.xmin, hor.xmin, hor.xmax - V2D_SCROLLER_HANDLE_SIZE);
/* store in scrollers, used for drawing */
scrollers->vert = vert;
scrollers->hor = hor;
/* scroller 'buttons':
* - These should always remain within the visible region of the scrollbar
* - They represent the region of 'tot' that is visible in 'cur'
*/
/* horizontal scrollers */
if (scroll & V2D_SCROLL_HORIZONTAL) {
/* scroller 'button' extents */
totsize = BLI_rctf_size_x(&v2d->tot);
scrollsize = (float)BLI_rcti_size_x(&hor);
if (totsize == 0.0f) totsize = 1.0f; /* avoid divide by zero */
fac1 = (v2d->cur.xmin - v2d->tot.xmin) / totsize;
if (fac1 <= 0.0f)
scrollers->hor_min = hor.xmin;
else
scrollers->hor_min = (int)(hor.xmin + (fac1 * scrollsize));
fac2 = (v2d->cur.xmax - v2d->tot.xmin) / totsize;
if (fac2 >= 1.0f)
scrollers->hor_max = hor.xmax;
else
scrollers->hor_max = (int)(hor.xmin + (fac2 * scrollsize));
/* prevent inverted sliders */
if (scrollers->hor_min > scrollers->hor_max)
scrollers->hor_min = scrollers->hor_max;
/* prevent sliders from being too small, and disappearing */
if ((scrollers->hor_max - scrollers->hor_min) < V2D_SCROLLER_HANDLE_SIZE) {
scrollers->hor_max = scrollers->hor_min + V2D_SCROLLER_HANDLE_SIZE;
CLAMP(scrollers->hor_max, hor.xmin + V2D_SCROLLER_HANDLE_SIZE, hor.xmax);
CLAMP(scrollers->hor_min, hor.xmin, hor.xmax - V2D_SCROLLER_HANDLE_SIZE);
}
}
/* vertical scrollers */
if (scroll & V2D_SCROLL_VERTICAL) {
/* scroller 'button' extents */
totsize = BLI_rctf_size_y(&v2d->tot);
scrollsize = (float)BLI_rcti_size_y(&vert);
if (totsize == 0.0f) totsize = 1.0f; /* avoid divide by zero */
fac1 = (v2d->cur.ymin - v2d->tot.ymin) / totsize;
if (fac1 <= 0.0f)
scrollers->vert_min = vert.ymin;
else
scrollers->vert_min = (int)(vert.ymin + (fac1 * scrollsize));
fac2 = (v2d->cur.ymax - v2d->tot.ymin) / totsize;
if (fac2 >= 1.0f)
scrollers->vert_max = vert.ymax;
else
scrollers->vert_max = (int)(vert.ymin + (fac2 * scrollsize));
/* prevent inverted sliders */
if (scrollers->vert_min > scrollers->vert_max)
scrollers->vert_min = scrollers->vert_max;
/* prevent sliders from being too small, and disappearing */
if ((scrollers->vert_max - scrollers->vert_min) < V2D_SCROLLER_HANDLE_SIZE) {
scrollers->vert_max = scrollers->vert_min + V2D_SCROLLER_HANDLE_SIZE;
CLAMP(scrollers->vert_max, vert.ymin + V2D_SCROLLER_HANDLE_SIZE, vert.ymax);
CLAMP(scrollers->vert_min, vert.ymin, vert.ymax - V2D_SCROLLER_HANDLE_SIZE);
}
}
/* grid markings on scrollbars */
if (scroll & (V2D_SCROLL_SCALE_HORIZONTAL | V2D_SCROLL_SCALE_VERTICAL)) {
/* store clamping */
scrollers->xclamp = xclamp;
scrollers->xunits = xunits;
scrollers->yclamp = yclamp;
scrollers->yunits = yunits;
scrollers->grid = UI_view2d_grid_calc(CTX_data_scene(C), v2d,
xunits, xclamp, yunits, yclamp,
BLI_rcti_size_x(&hor), BLI_rcti_size_y(&vert));
}
/* return scrollers */
return scrollers;
}
/* Print scale marking along a time scrollbar */
static void scroll_printstr(Scene *scene, float x, float y, float val, int power, short unit, char dir)
{
int len;
char timecode_str[32];
/* adjust the scale unit to work ok */
if (dir == 'v') {
/* here we bump up the power by factor of 10, as
* rotation values (hence 'degrees') are divided by 10 to
* be able to show the curves at the same time
*/
if (ELEM(unit, V2D_UNIT_DEGREES, V2D_UNIT_TIME)) {
power += 1;
val *= 10;
}
}
/* get string to print */
if (unit == V2D_UNIT_SECONDS) {
/* not neces*/
BLI_timecode_string_from_time(timecode_str, sizeof(timecode_str), power, val, FPS, U.timecode_style);
}
else {
BLI_timecode_string_from_time_simple(timecode_str, sizeof(timecode_str), power, val);
}
/* get length of string, and adjust printing location to fit it into the horizontal scrollbar */
len = strlen(timecode_str);
if (dir == 'h') {
/* seconds/timecode display has slightly longer strings... */
if (unit == V2D_UNIT_SECONDS)
x -= 3 * len;
else
x -= 4 * len;
}
/* Add degree sympbol to end of string for vertical scrollbar? */
if ((dir == 'v') && (unit == V2D_UNIT_DEGREES)) {
timecode_str[len] = 186;
timecode_str[len + 1] = 0;
}
/* draw it */
BLF_draw_default_ascii(x, y, 0.0f, timecode_str, sizeof(timecode_str));
}
/* Draw scrollbars in the given 2d-region */
void UI_view2d_scrollers_draw(const bContext *C, View2D *v2d, View2DScrollers *vs)
{
Scene *scene = CTX_data_scene(C);
rcti vert, hor;
int scroll = view2d_scroll_mapped(v2d->scroll);
/* make copies of rects for less typing */
vert = vs->vert;
hor = vs->hor;
/* horizontal scrollbar */
if (scroll & V2D_SCROLL_HORIZONTAL) {
bTheme *btheme = UI_GetTheme();
uiWidgetColors wcol = btheme->tui.wcol_scroll;
rcti slider;
int state;
unsigned char col[4];
slider.xmin = vs->hor_min;
slider.xmax = vs->hor_max;
slider.ymin = hor.ymin;
slider.ymax = hor.ymax;
state = (v2d->scroll_ui & V2D_SCROLL_H_ACTIVE) ? UI_SCROLL_PRESSED : 0;
/* show zoom handles if:
* - zooming on x-axis is allowed (no scroll otherwise)
* - slider bubble is large enough (no overdraw confusion)
* - scale is shown on the scroller
* (workaround to make sure that button windows don't show these,
* and only the time-grids with their zoomability can do so)
*/
if ((v2d->keepzoom & V2D_LOCKZOOM_X) == 0 &&
(v2d->scroll & V2D_SCROLL_SCALE_HORIZONTAL) &&
(BLI_rcti_size_x(&slider) > V2D_SCROLLER_HANDLE_SIZE))
{
state |= UI_SCROLL_ARROWS;
}
/* clean rect behind slider, but not with transparent background */
UI_GetThemeColor4ubv(TH_BACK, col);
if (col[3] == 255) {
glColor3ub(col[0], col[1], col[2]);
glRecti(v2d->hor.xmin, v2d->hor.ymin, v2d->hor.xmax, v2d->hor.ymax);
}
uiWidgetScrollDraw(&wcol, &hor, &slider, state);
/* scale indicators */
if ((scroll & V2D_SCROLL_SCALE_HORIZONTAL) && (vs->grid)) {
View2DGrid *grid = vs->grid;
float fac, dfac, fac2, val;
/* the numbers: convert grid->startx and -dx to scroll coordinates
* - fac is x-coordinate to draw to
* - dfac is gap between scale markings
*/
fac = (grid->startx - v2d->cur.xmin) / BLI_rctf_size_x(&v2d->cur);
fac = (float)hor.xmin + fac * BLI_rcti_size_x(&hor);
dfac = grid->dx / BLI_rctf_size_x(&v2d->cur);
dfac = dfac * BLI_rcti_size_x(&hor);
/* set starting value, and text color */
UI_ThemeColor(TH_TEXT);
val = grid->startx;
/* if we're clamping to whole numbers only, make sure entries won't be repeated */
if (vs->xclamp == V2D_GRID_CLAMP) {
while (grid->dx < 0.9999f) {
grid->dx *= 2.0f;
dfac *= 2.0f;
}
}
if (vs->xunits == V2D_UNIT_FRAMES)
grid->powerx = 1;
/* draw numbers in the appropriate range */
if (dfac > 0.0f) {
float h = 0.1f * UI_UNIT_Y + (float)(hor.ymin);
for (; fac < hor.xmax - 0.5f * U.widget_unit; fac += dfac, val += grid->dx) {
/* make prints look nicer for scrollers */
if (fac < hor.xmin + 0.5f * U.widget_unit)
continue;
switch (vs->xunits) {
case V2D_UNIT_FRAMES: /* frames (as whole numbers)*/
scroll_printstr(scene, fac, h, val, grid->powerx, V2D_UNIT_FRAMES, 'h');
break;
case V2D_UNIT_FRAMESCALE: /* frames (not always as whole numbers) */
scroll_printstr(scene, fac, h, val, grid->powerx, V2D_UNIT_FRAMESCALE, 'h');
break;
case V2D_UNIT_SECONDS: /* seconds */
fac2 = val / (float)FPS;
scroll_printstr(scene, fac, h, fac2, grid->powerx, V2D_UNIT_SECONDS, 'h');
break;
case V2D_UNIT_DEGREES: /* Graph Editor for rotation Drivers */
/* HACK: although we're drawing horizontal, we make this draw as 'vertical', just to get degree signs */
scroll_printstr(scene, fac, h, val, grid->powerx, V2D_UNIT_DEGREES, 'v');
break;
}
}
}
}
}
/* vertical scrollbar */
if (scroll & V2D_SCROLL_VERTICAL) {
bTheme *btheme = UI_GetTheme();
uiWidgetColors wcol = btheme->tui.wcol_scroll;
rcti slider;
int state;
unsigned char col[4];
slider.xmin = vert.xmin;
slider.xmax = vert.xmax;
slider.ymin = vs->vert_min;
slider.ymax = vs->vert_max;
state = (v2d->scroll_ui & V2D_SCROLL_V_ACTIVE) ? UI_SCROLL_PRESSED : 0;
/* show zoom handles if:
* - zooming on y-axis is allowed (no scroll otherwise)
* - slider bubble is large enough (no overdraw confusion)
* - scale is shown on the scroller
* (workaround to make sure that button windows don't show these,
* and only the time-grids with their zoomability can do so)
*/
if ((v2d->keepzoom & V2D_LOCKZOOM_Y) == 0 &&
(v2d->scroll & V2D_SCROLL_SCALE_VERTICAL) &&
(BLI_rcti_size_y(&slider) > V2D_SCROLLER_HANDLE_SIZE))
{
state |= UI_SCROLL_ARROWS;
}
/* clean rect behind slider, but not with transparent background */
UI_GetThemeColor4ubv(TH_BACK, col);
if (col[3] == 255) {
glColor3ub(col[0], col[1], col[2]);
glRecti(v2d->vert.xmin, v2d->vert.ymin, v2d->vert.xmax, v2d->vert.ymax);
}
uiWidgetScrollDraw(&wcol, &vert, &slider, state);
/* scale indiators */
if ((scroll & V2D_SCROLL_SCALE_VERTICAL) && (vs->grid)) {
View2DGrid *grid = vs->grid;
float fac, dfac, val;
/* the numbers: convert grid->starty and dy to scroll coordinates
* - fac is y-coordinate to draw to
* - dfac is gap between scale markings
* - these involve a correction for horizontal scrollbar
* NOTE: it's assumed that that scrollbar is there if this is involved!
*/
fac = (grid->starty - v2d->cur.ymin) / BLI_rctf_size_y(&v2d->cur);
fac = vert.ymin + fac * BLI_rcti_size_y(&vert);
dfac = grid->dy / BLI_rctf_size_y(&v2d->cur);
dfac = dfac * BLI_rcti_size_y(&vert);
/* set starting value, and text color */
UI_ThemeColor(TH_TEXT);
val = grid->starty;
/* if vertical clamping (to whole numbers) is used (i.e. in Sequencer), apply correction */
if (vs->yclamp == V2D_GRID_CLAMP)
fac += 0.5f * dfac;
/* draw vertical steps */
if (dfac > 0.0f) {
BLF_rotation_default(M_PI / 2);
BLF_enable_default(BLF_ROTATION);
for (; fac < vert.ymax - 10; fac += dfac, val += grid->dy) {
/* make prints look nicer for scrollers */
if (fac < vert.ymin + 10)
continue;
scroll_printstr(scene, (float)(vert.xmax) - 2.0f, fac, val, grid->powery, vs->yunits, 'v');
}
BLF_disable_default(BLF_ROTATION);
}
}
}
}
/* free temporary memory used for drawing scrollers */
void UI_view2d_scrollers_free(View2DScrollers *scrollers)
{
/* need to free grid as well... */
if (scrollers->grid) {
MEM_freeN(scrollers->grid);
}
MEM_freeN(scrollers);
}
/* *********************************************************************** */
/* List View Utilities */
/* Get the view-coordinates of the nominated cell
* - columnwidth, rowheight = size of each 'cell'
* - startx, starty = coordinates (in 'tot' rect space) that the list starts from
* This should be (0,0) for most views. However, for those where the starting row was offsetted
* (like for Animation Editor channel lists, to make the first entry more visible), these will be
* the min-coordinates of the first item.
* - column, row = the 2d-coordinates (in 2D-view / 'tot' rect space) the cell exists at
* - rect = coordinates of the cell (passed as single var instead of 4 separate, as it's more useful this way)
*/
void UI_view2d_listview_cell_to_view(View2D *v2d, float columnwidth, float rowheight,
float startx, float starty,
int column, int row, rctf *rect)
{
/* sanity checks */
if (ELEM(NULL, v2d, rect)) {
return;
}
if ((columnwidth <= 0) && (rowheight <= 0)) {
rect->xmin = rect->xmax = 0.0f;
rect->ymin = rect->ymax = 0.0f;
return;
}
/* x-coordinates */
rect->xmin = startx + (float)(columnwidth * column);
rect->xmax = startx + (float)(columnwidth * (column + 1));
if ((v2d->align & V2D_ALIGN_NO_POS_X) && !(v2d->align & V2D_ALIGN_NO_NEG_X)) {
/* simply negate the values for the coordinates if in negative half */
rect->xmin = -rect->xmin;
rect->xmax = -rect->xmax;
}
/* y-coordinates */
rect->ymin = starty + (float)(rowheight * row);
rect->ymax = starty + (float)(rowheight * (row + 1));
if ((v2d->align & V2D_ALIGN_NO_POS_Y) && !(v2d->align & V2D_ALIGN_NO_NEG_Y)) {
/* simply negate the values for the coordinates if in negative half */
rect->ymin = -rect->ymin;
rect->ymax = -rect->ymax;
}
}
/* Get the 'cell' (row, column) that the given 2D-view coordinates (i.e. in 'tot' rect space) lie in.
* - columnwidth, rowheight = size of each 'cell'
* - startx, starty = coordinates (in 'tot' rect space) that the list starts from
* This should be (0,0) for most views. However, for those where the starting row was offsetted
* (like for Animation Editor channel lists, to make the first entry more visible), these will be
* the min-coordinates of the first item.
* - viewx, viewy = 2D-coordinates (in 2D-view / 'tot' rect space) to get the cell for
* - column, row = the 'coordinates' of the relevant 'cell'
*/
void UI_view2d_listview_view_to_cell(View2D *v2d, float columnwidth, float rowheight, float startx, float starty,
float viewx, float viewy, int *column, int *row)
{
/* adjust view coordinates to be all positive ints, corrected for the start offset */
const int x = (int)(floorf(fabsf(viewx) + 0.5f) - startx);
const int y = (int)(floorf(fabsf(viewy) + 0.5f) - starty);
/* sizes must not be negative */
if ((v2d == NULL) || ((columnwidth <= 0) && (rowheight <= 0))) {
if (column) *column = 0;
if (row) *row = 0;
return;
}
/* get column */
if ((column) && (columnwidth > 0))
*column = x / columnwidth;
else if (column)
*column = 0;
/* get row */
if ((row) && (rowheight > 0))
*row = y / rowheight;
else if (row)
*row = 0;
}
/* Get the 'extreme' (min/max) column and row indices which are visible within the 'cur' rect
* - columnwidth, rowheight = size of each 'cell'
* - startx, starty = coordinates that the list starts from, which should be (0,0) for most views
* - column/row_min/max = the starting and ending column/row indices
*/
void UI_view2d_listview_visible_cells(View2D *v2d, float columnwidth, float rowheight, float startx, float starty,
int *column_min, int *column_max, int *row_min, int *row_max)
{
/* using 'cur' rect coordinates, call the cell-getting function to get the cells for this */
if (v2d) {
/* min */
UI_view2d_listview_view_to_cell(v2d, columnwidth, rowheight, startx, starty,
v2d->cur.xmin, v2d->cur.ymin, column_min, row_min);
/* max*/
UI_view2d_listview_view_to_cell(v2d, columnwidth, rowheight, startx, starty,
v2d->cur.xmax, v2d->cur.ymax, column_max, row_max);
}
}
/* *********************************************************************** */
/* Coordinate Conversions */
float UI_view2d_region_to_view_x(struct View2D *v2d, float x)
{
return (v2d->cur.xmin + (BLI_rctf_size_x(&v2d->cur) * (x - v2d->mask.xmin) / BLI_rcti_size_x(&v2d->mask)));
}
float UI_view2d_region_to_view_y(struct View2D *v2d, float y)
{
return (v2d->cur.ymin + (BLI_rctf_size_y(&v2d->cur) * (y - v2d->mask.ymin) / BLI_rcti_size_y(&v2d->mask)));
}
/* Convert from screen/region space to 2d-View space
*
* - x,y = coordinates to convert
* - viewx,viewy = resultant coordinates
*/
void UI_view2d_region_to_view(View2D *v2d, float x, float y, float *r_view_x, float *r_view_y)
{
*r_view_x = UI_view2d_region_to_view_x(v2d, x);
*r_view_y = UI_view2d_region_to_view_y(v2d, y);
}
void UI_view2d_region_to_view_rctf(View2D *v2d, const rctf *rect_src, rctf *rect_dst)
{
const float cur_size[2] = {BLI_rctf_size_x(&v2d->cur), BLI_rctf_size_y(&v2d->cur)};
const float mask_size[2] = {BLI_rcti_size_x(&v2d->mask), BLI_rcti_size_y(&v2d->mask)};
rect_dst->xmin = (v2d->cur.xmin + (cur_size[0] * (rect_src->xmin - v2d->mask.xmin) / mask_size[0]));
rect_dst->xmax = (v2d->cur.xmin + (cur_size[0] * (rect_src->xmax - v2d->mask.xmin) / mask_size[0]));
rect_dst->ymin = (v2d->cur.ymin + (cur_size[1] * (rect_src->ymin - v2d->mask.ymin) / mask_size[1]));
rect_dst->ymax = (v2d->cur.ymin + (cur_size[1] * (rect_src->ymax - v2d->mask.ymin) / mask_size[1]));
}
float UI_view2d_view_to_region_x(View2D *v2d, float x)
{
return (v2d->mask.xmin + (((x - v2d->cur.xmin) / BLI_rctf_size_x(&v2d->cur)) * BLI_rcti_size_x(&v2d->mask)));
}
float UI_view2d_view_to_region_y(View2D *v2d, float y)
{
return (v2d->mask.ymin + (((y - v2d->cur.ymin) / BLI_rctf_size_y(&v2d->cur)) * BLI_rcti_size_y(&v2d->mask)));
}
/* Convert from 2d-View space to screen/region space
* - Coordinates are clamped to lie within bounds of region
*
* - x,y = coordinates to convert
* - regionx,regiony = resultant coordinates
*/
bool UI_view2d_view_to_region_clip(View2D *v2d, float x, float y, int *r_region_x, int *r_region_y)
{
/* express given coordinates as proportional values */
x = (x - v2d->cur.xmin) / BLI_rctf_size_x(&v2d->cur);
y = (y - v2d->cur.ymin) / BLI_rctf_size_y(&v2d->cur);
/* check if values are within bounds */
if ((x >= 0.0f) && (x <= 1.0f) && (y >= 0.0f) && (y <= 1.0f)) {
*r_region_x = (int)(v2d->mask.xmin + (x * BLI_rcti_size_x(&v2d->mask)));
*r_region_y = (int)(v2d->mask.ymin + (y * BLI_rcti_size_y(&v2d->mask)));
return true;
}
else {
/* set initial value in case coordinate lies outside of bounds */
*r_region_x = *r_region_y = V2D_IS_CLIPPED;
return false;
}
}
/* Convert from 2d-view space to screen/region space
* - Coordinates are NOT clamped to lie within bounds of region
*
* - x,y = coordinates to convert
* - regionx,regiony = resultant coordinates
*/
void UI_view2d_view_to_region(View2D *v2d, float x, float y, int *r_region_x, int *r_region_y)
{
/* step 1: express given coordinates as proportional values */
x = (x - v2d->cur.xmin) / BLI_rctf_size_x(&v2d->cur);
y = (y - v2d->cur.ymin) / BLI_rctf_size_y(&v2d->cur);
/* step 2: convert proportional distances to screen coordinates */
x = v2d->mask.xmin + (x * BLI_rcti_size_x(&v2d->mask));
y = v2d->mask.ymin + (y * BLI_rcti_size_y(&v2d->mask));
/* although we don't clamp to lie within region bounds, we must avoid exceeding size of ints */
*r_region_x = clamp_float_to_int(x);
*r_region_y = clamp_float_to_int(y);
}
void UI_view2d_view_to_region_fl(View2D *v2d, float x, float y, float *r_region_x, float *r_region_y)
{
/* express given coordinates as proportional values */
x = (x - v2d->cur.xmin) / BLI_rctf_size_x(&v2d->cur);
y = (y - v2d->cur.ymin) / BLI_rctf_size_y(&v2d->cur);
/* convert proportional distances to screen coordinates */
*r_region_x = v2d->mask.xmin + (x * BLI_rcti_size_x(&v2d->mask));
*r_region_y = v2d->mask.ymin + (y * BLI_rcti_size_y(&v2d->mask));
}
void UI_view2d_view_to_region_rcti(View2D *v2d, const rctf *rect_src, rcti *rect_dst)
{
const float cur_size[2] = {BLI_rctf_size_x(&v2d->cur), BLI_rctf_size_y(&v2d->cur)};
const float mask_size[2] = {BLI_rcti_size_x(&v2d->mask), BLI_rcti_size_y(&v2d->mask)};
rctf rect_tmp;
/* step 1: express given coordinates as proportional values */
rect_tmp.xmin = (rect_src->xmin - v2d->cur.xmin) / cur_size[0];
rect_tmp.xmax = (rect_src->xmax - v2d->cur.xmin) / cur_size[0];
rect_tmp.ymin = (rect_src->ymin - v2d->cur.ymin) / cur_size[1];
rect_tmp.ymax = (rect_src->ymax - v2d->cur.ymin) / cur_size[1];
/* step 2: convert proportional distances to screen coordinates */
rect_tmp.xmin = v2d->mask.xmin + (rect_tmp.xmin * mask_size[0]);
rect_tmp.xmax = v2d->mask.xmin + (rect_tmp.xmax * mask_size[0]);
rect_tmp.ymin = v2d->mask.ymin + (rect_tmp.ymin * mask_size[1]);
rect_tmp.ymax = v2d->mask.ymin + (rect_tmp.ymax * mask_size[1]);
clamp_rctf_to_rcti(rect_dst, &rect_tmp);
}
bool UI_view2d_view_to_region_rcti_clip(View2D *v2d, const rctf *rect_src, rcti *rect_dst)
{
const float cur_size[2] = {BLI_rctf_size_x(&v2d->cur), BLI_rctf_size_y(&v2d->cur)};
const float mask_size[2] = {BLI_rcti_size_x(&v2d->mask), BLI_rcti_size_y(&v2d->mask)};
rctf rect_tmp;
BLI_assert(rect_src->xmin <= rect_src->xmax && rect_src->ymin <= rect_src->ymax);
/* step 1: express given coordinates as proportional values */
rect_tmp.xmin = (rect_src->xmin - v2d->cur.xmin) / cur_size[0];
rect_tmp.xmax = (rect_src->xmax - v2d->cur.xmin) / cur_size[0];
rect_tmp.ymin = (rect_src->ymin - v2d->cur.ymin) / cur_size[1];
rect_tmp.ymax = (rect_src->ymax - v2d->cur.ymin) / cur_size[1];
if (((rect_tmp.xmax < 0.0f) || (rect_tmp.xmin > 1.0f) ||
(rect_tmp.ymax < 0.0f) || (rect_tmp.ymin > 1.0f)) == 0)
{
/* step 2: convert proportional distances to screen coordinates */
rect_tmp.xmin = v2d->mask.xmin + (rect_tmp.xmin * mask_size[0]);
rect_tmp.xmax = v2d->mask.ymin + (rect_tmp.xmax * mask_size[0]);
rect_tmp.ymin = v2d->mask.ymin + (rect_tmp.ymin * mask_size[1]);
rect_tmp.ymax = v2d->mask.ymin + (rect_tmp.ymax * mask_size[1]);
clamp_rctf_to_rcti(rect_dst, &rect_tmp);
return true;
}
else {
rect_dst->xmin = rect_dst->xmax = rect_dst->ymin = rect_dst->ymax = V2D_IS_CLIPPED;
return false;
}
}
/* *********************************************************************** */
/* Utilities */
/* View2D data by default resides in region, so get from region stored in context */
View2D *UI_view2d_fromcontext(const bContext *C)
{
ScrArea *area = CTX_wm_area(C);
ARegion *region = CTX_wm_region(C);
if (area == NULL) return NULL;
if (region == NULL) return NULL;
return &(region->v2d);
}
/* same as above, but it returns regionwindow. Utility for pulldowns or buttons */
View2D *UI_view2d_fromcontext_rwin(const bContext *C)
{
ScrArea *sa = CTX_wm_area(C);
ARegion *region = CTX_wm_region(C);
if (sa == NULL) return NULL;
if (region == NULL) return NULL;
if (region->regiontype != RGN_TYPE_WINDOW) {
ARegion *ar = BKE_area_find_region_type(sa, RGN_TYPE_WINDOW);
return ar ? &(ar->v2d) : NULL;
}
return &(region->v2d);
}
/* Calculate the scale per-axis of the drawing-area
* - Is used to inverse correct drawing of icons, etc. that need to follow view
* but not be affected by scale
*
* - x,y = scale on each axis
*/
void UI_view2d_scale_get(View2D *v2d, float *x, float *y)
{
if (x) *x = BLI_rcti_size_x(&v2d->mask) / BLI_rctf_size_x(&v2d->cur);
if (y) *y = BLI_rcti_size_y(&v2d->mask) / BLI_rctf_size_y(&v2d->cur);
}
/* Same as UI_view2d_scale_get() - 1.0f / x, y */
void UI_view2d_scale_get_inverse(View2D *v2d, float *x, float *y)
{
if (x) *x = BLI_rctf_size_x(&v2d->cur) / BLI_rcti_size_x(&v2d->mask);
if (y) *y = BLI_rctf_size_y(&v2d->cur) / BLI_rcti_size_y(&v2d->mask);
}
/* Simple functions for consistent center offset access.
* Used by node editor to shift view center for each individual node tree.
*/
void UI_view2d_center_get(struct View2D *v2d, float *x, float *y)
{
/* get center */
if (x) *x = BLI_rctf_cent_x(&v2d->cur);
if (y) *y = BLI_rctf_cent_y(&v2d->cur);
}
void UI_view2d_center_set(struct View2D *v2d, float x, float y)
{
BLI_rctf_recenter(&v2d->cur, x, y);
/* make sure that 'cur' rect is in a valid state as a result of these changes */
UI_view2d_curRect_validate(v2d);
}
/**
* Simple pan function
* (0.0, 0.0) bottom left
* (0.5, 0.5) center
* (1.0, 1.0) top right.
*/
void UI_view2d_offset(struct View2D *v2d, float xfac, float yfac)
{
if (xfac != -1.0f) {
const float xsize = BLI_rctf_size_x(&v2d->cur);
const float xmin = v2d->tot.xmin;
const float xmax = v2d->tot.xmax - xsize;
v2d->cur.xmin = (xmin * (1.0f - xfac)) + (xmax * xfac);
v2d->cur.xmax = v2d->cur.xmin + xsize;
}
if (yfac != -1.0f) {
const float ysize = BLI_rctf_size_y(&v2d->cur);
const float ymin = v2d->tot.ymin;
const float ymax = v2d->tot.ymax - ysize;
v2d->cur.ymin = (ymin * (1.0f - yfac)) + (ymax * yfac);
v2d->cur.ymax = v2d->cur.ymin + ysize;
}
UI_view2d_curRect_validate(v2d);
}
/* Check if mouse is within scrollers
* - Returns appropriate code for match
* 'h' = in horizontal scroller
* 'v' = in vertical scroller
* 0 = not in scroller
*
* - x,y = mouse coordinates in screen (not region) space
*/
short UI_view2d_mouse_in_scrollers(const bContext *C, View2D *v2d, int x, int y)
{
ARegion *ar = CTX_wm_region(C);
int co[2];
int scroll = view2d_scroll_mapped(v2d->scroll);
/* clamp x,y to region-coordinates first */
co[0] = x - ar->winrct.xmin;
co[1] = y - ar->winrct.ymin;
/* check if within scrollbars */
if (scroll & V2D_SCROLL_HORIZONTAL) {
if (IN_2D_HORIZ_SCROLL(v2d, co)) return 'h';
}
if (scroll & V2D_SCROLL_VERTICAL) {
if (IN_2D_VERT_SCROLL(v2d, co)) return 'v';
}
/* not found */
return 0;
}
/* ******************* view2d text drawing cache ******************** */
typedef struct View2DString {
struct View2DString *next;
union {
unsigned char ub[4];
int pack;
} col;
rcti rect;
int mval[2];
/* str is allocated past the end */
char str[0];
} View2DString;
/* assumes caches are used correctly, so for time being no local storage in v2d */
static MemArena *g_v2d_strings_arena = NULL;
static View2DString *g_v2d_strings = NULL;
void UI_view2d_text_cache_add(View2D *v2d, float x, float y,
const char *str, size_t str_len, const char col[4])
{
int mval[2];
BLI_assert(str_len == strlen(str));
if (UI_view2d_view_to_region_clip(v2d, x, y, &mval[0], &mval[1])) {
int alloc_len = str_len + 1;
View2DString *v2s;
if (g_v2d_strings_arena == NULL) {
g_v2d_strings_arena = BLI_memarena_new(MEM_SIZE_OPTIMAL(1 << 14), __func__);
}
v2s = BLI_memarena_alloc(g_v2d_strings_arena, sizeof(View2DString) + alloc_len);
BLI_LINKS_PREPEND(g_v2d_strings, v2s);
v2s->col.pack = *((int *)col);
memset(&v2s->rect, 0, sizeof(v2s->rect));
v2s->mval[0] = mval[0];
v2s->mval[1] = mval[1];
memcpy(v2s->str, str, alloc_len);
}
}
/* no clip (yet) */
void UI_view2d_text_cache_add_rectf(View2D *v2d, const rctf *rect_view,
const char *str, size_t str_len, const char col[4])
{
rcti rect;
BLI_assert(str_len == strlen(str));
if (UI_view2d_view_to_region_rcti_clip(v2d, rect_view, &rect)) {
int alloc_len = str_len + 1;
View2DString *v2s;
if (g_v2d_strings_arena == NULL) {
g_v2d_strings_arena = BLI_memarena_new(MEM_SIZE_OPTIMAL(1 << 14), __func__);
}
v2s = BLI_memarena_alloc(g_v2d_strings_arena, sizeof(View2DString) + alloc_len);
BLI_LINKS_PREPEND(g_v2d_strings, v2s);
v2s->col.pack = *((int *)col);
v2s->rect = rect;
v2s->mval[0] = v2s->rect.xmin;
v2s->mval[1] = v2s->rect.ymin;
memcpy(v2s->str, str, alloc_len);
}
}
void UI_view2d_text_cache_draw(ARegion *ar)
{
View2DString *v2s;
int col_pack_prev = 0;
/* investigate using BLF_ascender() */
const float default_height = g_v2d_strings ? BLF_height_default("28", 3) : 0.0f;
wmOrtho2_region_ui(ar);
for (v2s = g_v2d_strings; v2s; v2s = v2s->next) {
int xofs = 0, yofs;
yofs = ceil(0.5f * (BLI_rcti_size_y(&v2s->rect) - default_height));
if (yofs < 1) yofs = 1;
if (col_pack_prev != v2s->col.pack) {
glColor3ubv(v2s->col.ub);
col_pack_prev = v2s->col.pack;
}
if (v2s->rect.xmin >= v2s->rect.xmax)
BLF_draw_default((float)(v2s->mval[0] + xofs), (float)(v2s->mval[1] + yofs), 0.0,
v2s->str, BLF_DRAW_STR_DUMMY_MAX);
else {
BLF_clipping_default(v2s->rect.xmin - 4, v2s->rect.ymin - 4, v2s->rect.xmax + 4, v2s->rect.ymax + 4);
BLF_enable_default(BLF_CLIPPING);
BLF_draw_default(v2s->rect.xmin + xofs, v2s->rect.ymin + yofs, 0.0f,
v2s->str, BLF_DRAW_STR_DUMMY_MAX);
BLF_disable_default(BLF_CLIPPING);
}
}
g_v2d_strings = NULL;
if (g_v2d_strings_arena) {
BLI_memarena_free(g_v2d_strings_arena);
g_v2d_strings_arena = NULL;
}
// glMatrixMode(GL_PROJECTION);
// glPopMatrix();
// glMatrixMode(GL_MODELVIEW);
// glPopMatrix();
}
/* ******************************************************** */
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