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Diffstat (limited to 'src/object-edit.cpp')
| -rw-r--r-- | src/object-edit.cpp | 1074 |
1 files changed, 1074 insertions, 0 deletions
diff --git a/src/object-edit.cpp b/src/object-edit.cpp new file mode 100644 index 000000000..3db0f0a21 --- /dev/null +++ b/src/object-edit.cpp @@ -0,0 +1,1074 @@ +#define __SP_OBJECT_EDIT_C__ + +/* + * Node editing extension to objects + * + * Authors: + * Lauris Kaplinski <lauris@kaplinski.com> + * Mitsuru Oka + * + * Licensed under GNU GPL + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + + + +#include "sp-item.h" +#include "sp-rect.h" +#include "sp-ellipse.h" +#include "sp-star.h" +#include "sp-spiral.h" +#include "sp-offset.h" +#include "sp-flowtext.h" +#include "prefs-utils.h" +#include "inkscape.h" +#include "snap.h" +#include "desktop-affine.h" +#include <style.h> +#include "desktop.h" + +#include "sp-pattern.h" +#include "sp-path.h" + +#include <glibmm/i18n.h> + +#include "object-edit.h" + +#include <libnr/nr-scale-ops.h> + + +#include "xml/repr.h" + +#include "isnan.h" + +#define sp_round(v,m) (((v) < 0.0) ? ((ceil((v) / (m) - 0.5)) * (m)) : ((floor((v) / (m) + 0.5)) * (m))) + +static SPKnotHolder *sp_rect_knot_holder(SPItem *item, SPDesktop *desktop); +static SPKnotHolder *sp_arc_knot_holder(SPItem *item, SPDesktop *desktop); +static SPKnotHolder *sp_star_knot_holder(SPItem *item, SPDesktop *desktop); +static SPKnotHolder *sp_spiral_knot_holder(SPItem *item, SPDesktop *desktop); +static SPKnotHolder *sp_offset_knot_holder(SPItem *item, SPDesktop *desktop); +static SPKnotHolder *sp_path_knot_holder(SPItem *item, SPDesktop *desktop); +static SPKnotHolder *sp_flowtext_knot_holder(SPItem *item, SPDesktop *desktop); +static void sp_pat_knot_holder(SPItem *item, SPKnotHolder *knot_holder); + +SPKnotHolder * +sp_item_knot_holder(SPItem *item, SPDesktop *desktop) +{ + if (SP_IS_RECT(item)) { + return sp_rect_knot_holder(item, desktop); + } else if (SP_IS_ARC(item)) { + return sp_arc_knot_holder(item, desktop); + } else if (SP_IS_STAR(item)) { + return sp_star_knot_holder(item, desktop); + } else if (SP_IS_SPIRAL(item)) { + return sp_spiral_knot_holder(item, desktop); + } else if (SP_IS_OFFSET(item)) { + return sp_offset_knot_holder(item, desktop); + } else if (SP_IS_PATH(item)) { + return sp_path_knot_holder(item, desktop); + } else if (SP_IS_FLOWTEXT(item) && SP_FLOWTEXT(item)->has_internal_frame()) { + return sp_flowtext_knot_holder(item, desktop); + } + + return NULL; +} + + +/* Pattern manipulation */ + +static gdouble sp_pattern_extract_theta(SPPattern *pat, gdouble scale) +{ + gdouble theta = asin(pat->patternTransform[1] / scale); + if (pat->patternTransform[0] < 0) theta = M_PI - theta ; + return theta; +} + +static gdouble sp_pattern_extract_scale(SPPattern *pat) +{ + gdouble s = pat->patternTransform[1]; + gdouble c = pat->patternTransform[0]; + gdouble xscale = sqrt(c * c + s * s); + return xscale; +} + +static NR::Point sp_pattern_extract_trans(SPPattern const *pat) +{ + return NR::Point(pat->patternTransform[4], pat->patternTransform[5]); +} + +static void +sp_pattern_xy_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)); + + NR::Point p_snapped = p; + + if ( state & GDK_CONTROL_MASK ) { + if (fabs((p - origin)[NR::X]) > fabs((p - origin)[NR::Y])) { + p_snapped[NR::Y] = origin[NR::Y]; + } else { + p_snapped[NR::X] = origin[NR::X]; + } + } + + if (state) { + NR::Point const q = p_snapped - sp_pattern_extract_trans(pat); + sp_item_adjust_pattern(item, NR::Matrix(NR::translate(q))); + } + + item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + + +static NR::Point sp_pattern_xy_get(SPItem *item) +{ + SPPattern const *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)); + return sp_pattern_extract_trans(pat); +} + +static NR::Point sp_pattern_angle_get(SPItem *item) +{ + SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)); + + gdouble x = (pattern_width(pat)*0.5); + gdouble y = 0; + NR::Point delta = NR::Point(x,y); + gdouble scale = sp_pattern_extract_scale(pat); + gdouble theta = sp_pattern_extract_theta(pat, scale); + delta = delta * NR::Matrix(NR::rotate(theta))*NR::Matrix(NR::scale(scale,scale)); + delta = delta + sp_pattern_extract_trans(pat); + return delta; +} + +static void +sp_pattern_angle_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + int const snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12); + + SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)); + + // get the angle from pattern 0,0 to the cursor pos + NR::Point delta = p - sp_pattern_extract_trans(pat); + gdouble theta = atan2(delta); + + if ( state & GDK_CONTROL_MASK ) { + theta = sp_round(theta, M_PI/snaps); + } + + // get the scale from the current transform so we can keep it. + gdouble scl = sp_pattern_extract_scale(pat); + NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl)); + NR::Point const t = sp_pattern_extract_trans(pat); + rot[4] = t[NR::X]; + rot[5] = t[NR::Y]; + sp_item_adjust_pattern(item, rot, true); + item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static void +sp_pattern_scale_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)); + + // Get the scale from the position of the knotholder, + NR::Point d = p - sp_pattern_extract_trans(pat); + gdouble s = NR::L2(d); + gdouble pat_x = pattern_width(pat) * 0.5; + gdouble pat_y = pattern_height(pat) * 0.5; + gdouble pat_h = hypot(pat_x, pat_y); + gdouble scl = s / pat_h; + + // get angle from current transform, (need get current scale first to calculate angle) + gdouble oldscale = sp_pattern_extract_scale(pat); + gdouble theta = sp_pattern_extract_theta(pat,oldscale); + + NR::Matrix rot = NR::Matrix(NR::rotate(theta)) * NR::Matrix(NR::scale(scl,scl)); + NR::Point const t = sp_pattern_extract_trans(pat); + rot[4] = t[NR::X]; + rot[5] = t[NR::Y]; + sp_item_adjust_pattern(item, rot, true); + item->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + + +static NR::Point sp_pattern_scale_get(SPItem *item) +{ + SPPattern *pat = SP_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style)); + + gdouble x = pattern_width(pat)*0.5; + gdouble y = pattern_height(pat)*0.5; + NR::Point delta = NR::Point(x,y); + NR::Matrix a = pat->patternTransform; + a[4] = 0; + a[5] = 0; + delta = delta * a; + delta = delta + sp_pattern_extract_trans(pat); + return delta; +} + +/* SPRect */ + +static NR::Point sp_rect_rx_get(SPItem *item) +{ + SPRect *rect = SP_RECT(item); + + return NR::Point(rect->x.computed + rect->width.computed - rect->rx.computed, rect->y.computed); +} + +static void sp_rect_rx_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPRect *rect = SP_RECT(item); + + if (state & GDK_CONTROL_MASK) { + gdouble temp = MIN(rect->height.computed, rect->width.computed) / 2.0; + rect->rx.computed = rect->ry.computed = CLAMP(rect->x.computed + rect->width.computed - p[NR::X], 0.0, temp); + rect->rx._set = rect->ry._set = true; + + } else { + rect->rx.computed = CLAMP(rect->x.computed + rect->width.computed - p[NR::X], 0.0, rect->width.computed / 2.0); + rect->rx._set = true; + } + + ((SPObject*)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + + +static NR::Point sp_rect_ry_get(SPItem *item) +{ + SPRect *rect = SP_RECT(item); + + return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->ry.computed); +} + +static void sp_rect_ry_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPRect *rect = SP_RECT(item); + + if (state & GDK_CONTROL_MASK) { + gdouble temp = MIN(rect->height.computed, rect->width.computed) / 2.0; + rect->rx.computed = rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed, 0.0, temp); + rect->ry._set = rect->rx._set = true; + } else { + if (!rect->rx._set || rect->rx.computed == 0) { + rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed, + 0.0, + MIN(rect->height.computed / 2.0, rect->width.computed / 2.0)); + } else { + rect->ry.computed = CLAMP(p[NR::Y] - rect->y.computed, + 0.0, + rect->height.computed / 2.0); + } + + rect->ry._set = true; + } + + ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +/** + * Remove rounding from a rectangle. + */ +static void rect_remove_rounding(SPRect *rect) +{ + SP_OBJECT_REPR(rect)->setAttribute("rx", NULL); + SP_OBJECT_REPR(rect)->setAttribute("ry", NULL); +} + +/** + * Called when the horizontal rounding radius knot is clicked. + */ +static void sp_rect_rx_knot_click(SPItem *item, guint state) +{ + SPRect *rect = SP_RECT(item); + + if (state & GDK_SHIFT_MASK) { + rect_remove_rounding(rect); + } else if (state & GDK_CONTROL_MASK) { + /* Ctrl-click sets the vertical rounding to be the same as the horizontal */ + SP_OBJECT_REPR(rect)->setAttribute("ry", SP_OBJECT_REPR(rect)->attribute("rx")); + } +} + +/** + * Called when the vertical rounding radius knot is clicked. + */ +static void sp_rect_ry_knot_click(SPItem *item, guint state) +{ + SPRect *rect = SP_RECT(item); + + if (state & GDK_SHIFT_MASK) { + rect_remove_rounding(rect); + } else if (state & GDK_CONTROL_MASK) { + /* Ctrl-click sets the vertical rounding to be the same as the horizontal */ + SP_OBJECT_REPR(rect)->setAttribute("rx", SP_OBJECT_REPR(rect)->attribute("ry")); + } +} + +#define SGN(x) ((x)>0?1:((x)<0?-1:0)) + +static void sp_rect_clamp_radii(SPRect *rect) +{ + // clamp rounding radii so that they do not exceed width/height + if (2 * rect->rx.computed > rect->width.computed) { + rect->rx.computed = 0.5 * rect->width.computed; + rect->rx._set = true; + } + if (2 * rect->ry.computed > rect->height.computed) { + rect->ry.computed = 0.5 * rect->height.computed; + rect->ry._set = true; + } +} + +static NR::Point sp_rect_wh_get(SPItem *item) +{ + SPRect *rect = SP_RECT(item); + + return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->height.computed); +} + +static NR::Point rect_snap_knot_position(NR::Point const &p) +{ + SPDesktop const *desktop = inkscape_active_desktop(); + NR::Point s = sp_desktop_dt2root_xy_point(desktop, p); + SnapManager const m(desktop->namedview); + s = m.freeSnap(Inkscape::Snapper::BBOX_POINT | Inkscape::Snapper::SNAP_POINT, s, NULL).getPoint(); + return sp_desktop_root2dt_xy_point(desktop, s); +} + +static void sp_rect_wh_set_internal(SPRect *rect, NR::Point const &p, NR::Point const &origin, guint state) +{ + NR::Point const s = rect_snap_knot_position(p); + + if (state & GDK_CONTROL_MASK) { + // original width/height when drag started + gdouble const w_orig = (origin[NR::X] - rect->x.computed); + gdouble const h_orig = (origin[NR::Y] - rect->y.computed); + + //original ratio + gdouble const ratio = (w_orig / h_orig); + + // mouse displacement since drag started + gdouble const minx = s[NR::X] - origin[NR::X]; + gdouble const miny = s[NR::Y] - origin[NR::Y]; + + if (fabs(minx) > fabs(miny)) { + + // snap to horizontal or diagonal + rect->width.computed = MAX(w_orig + minx, 0); + if (minx != 0 && fabs(miny/minx) > 0.5 * 1/ratio && (SGN(minx) == SGN(miny))) { + // closer to the diagonal and in same-sign quarters, change both using ratio + rect->height.computed = MAX(h_orig + minx / ratio, 0); + } else { + // closer to the horizontal, change only width, height is h_orig + rect->height.computed = MAX(h_orig, 0); + } + + } else { + // snap to vertical or diagonal + rect->height.computed = MAX(h_orig + miny, 0); + if (miny != 0 && fabs(minx/miny) > 0.5 * ratio && (SGN(minx) == SGN(miny))) { + // closer to the diagonal and in same-sign quarters, change both using ratio + rect->width.computed = MAX(w_orig + miny * ratio, 0); + } else { + // closer to the vertical, change only height, width is w_orig + rect->width.computed = MAX(w_orig, 0); + } + } + + rect->width._set = rect->height._set = true; + + } else { + // move freely + rect->width.computed = MAX(s[NR::X] - rect->x.computed, 0); + rect->height.computed = MAX(s[NR::Y] - rect->y.computed, 0); + rect->width._set = rect->height._set = true; + } + + sp_rect_clamp_radii(rect); + + ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static void sp_rect_wh_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPRect *rect = SP_RECT(item); + + sp_rect_wh_set_internal(rect, p, origin, state); +} + +static NR::Point sp_rect_xy_get(SPItem *item) +{ + SPRect *rect = SP_RECT(item); + + return NR::Point(rect->x.computed, rect->y.computed); +} + +static void sp_rect_xy_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPRect *rect = SP_RECT(item); + + // opposite corner (unmoved) + gdouble opposite_x = (rect->x.computed + rect->width.computed); + gdouble opposite_y = (rect->y.computed + rect->height.computed); + + // original width/height when drag started + gdouble w_orig = opposite_x - origin[NR::X]; + gdouble h_orig = opposite_y - origin[NR::Y]; + + NR::Point const s = rect_snap_knot_position(p); + + // mouse displacement since drag started + gdouble minx = s[NR::X] - origin[NR::X]; + gdouble miny = s[NR::Y] - origin[NR::Y]; + + if (state & GDK_CONTROL_MASK) { + //original ratio + gdouble ratio = (w_orig / h_orig); + + if (fabs(minx) > fabs(miny)) { + + // snap to horizontal or diagonal + rect->x.computed = MIN(s[NR::X], opposite_x); + rect->width.computed = MAX(w_orig - minx, 0); + if (minx != 0 && fabs(miny/minx) > 0.5 * 1/ratio && (SGN(minx) == SGN(miny))) { + // closer to the diagonal and in same-sign quarters, change both using ratio + rect->y.computed = MIN(origin[NR::Y] + minx / ratio, opposite_y); + rect->height.computed = MAX(h_orig - minx / ratio, 0); + } else { + // closer to the horizontal, change only width, height is h_orig + rect->y.computed = MIN(origin[NR::Y], opposite_y); + rect->height.computed = MAX(h_orig, 0); + } + + } else { + + // snap to vertical or diagonal + rect->y.computed = MIN(s[NR::Y], opposite_y); + rect->height.computed = MAX(h_orig - miny, 0); + if (miny != 0 && fabs(minx/miny) > 0.5 *ratio && (SGN(minx) == SGN(miny))) { + // closer to the diagonal and in same-sign quarters, change both using ratio + rect->x.computed = MIN(origin[NR::X] + miny * ratio, opposite_x); + rect->width.computed = MAX(w_orig - miny * ratio, 0); + } else { + // closer to the vertical, change only height, width is w_orig + rect->x.computed = MIN(origin[NR::X], opposite_x); + rect->width.computed = MAX(w_orig, 0); + } + + } + + rect->width._set = rect->height._set = rect->x._set = rect->y._set = true; + + } else { + // move freely + rect->x.computed = MIN(s[NR::X], opposite_x); + rect->width.computed = MAX(w_orig - minx, 0); + rect->y.computed = MIN(s[NR::Y], opposite_y); + rect->height.computed = MAX(h_orig - miny, 0); + rect->width._set = rect->height._set = rect->x._set = rect->y._set = true; + } + + sp_rect_clamp_radii(rect); + + ((SPObject *)rect)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static SPKnotHolder *sp_rect_knot_holder(SPItem *item, SPDesktop *desktop) +{ + SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL); + + sp_knot_holder_add_full( + knot_holder, sp_rect_rx_set, sp_rect_rx_get, sp_rect_rx_knot_click, + SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR, + _("Adjust the <b>horizontal rounding</b> radius; with <b>Ctrl</b> to make the vertical " + "radius the same")); + + sp_knot_holder_add_full( + knot_holder, sp_rect_ry_set, sp_rect_ry_get, sp_rect_ry_knot_click, + SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR, + _("Adjust the <b>vertical rounding</b> radius; with <b>Ctrl</b> to make the horizontal " + "radius the same") + ); + + sp_knot_holder_add_full( + knot_holder, sp_rect_wh_set, sp_rect_wh_get, NULL, + SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR, + _("Adjust the <b>width and height</b> of the rectangle; with <b>Ctrl</b> to lock ratio " + "or stretch in one dimension only") + ); + + sp_knot_holder_add_full( + knot_holder, sp_rect_xy_set, sp_rect_xy_get, NULL, + SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR, + _("Adjust the <b>width and height</b> of the rectangle; with <b>Ctrl</b> to lock ratio " + "or stretch in one dimension only") + ); + + sp_pat_knot_holder(item, knot_holder); + return knot_holder; +} + +/* SPArc */ + +/* + * return values: + * 1 : inside + * 0 : on the curves + * -1 : outside + */ +static gint +sp_genericellipse_side(SPGenericEllipse *ellipse, NR::Point const &p) +{ + gdouble dx = (p[NR::X] - ellipse->cx.computed) / ellipse->rx.computed; + gdouble dy = (p[NR::Y] - ellipse->cy.computed) / ellipse->ry.computed; + + gdouble s = dx * dx + dy * dy; + if (s < 1.0) return 1; + if (s > 1.0) return -1; + return 0; +} + +static void +sp_arc_start_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12); + + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + SPArc *arc = SP_ARC(item); + + ge->closed = (sp_genericellipse_side(ge, p) == -1) ? TRUE : FALSE; + + NR::Point delta = p - NR::Point(ge->cx.computed, ge->cy.computed); + NR::scale sc(ge->rx.computed, ge->ry.computed); + ge->start = atan2(delta * sc.inverse()); + if ( ( state & GDK_CONTROL_MASK ) + && snaps ) + { + ge->start = sp_round(ge->start, M_PI/snaps); + } + sp_genericellipse_normalize(ge); + ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static NR::Point sp_arc_start_get(SPItem *item) +{ + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + SPArc *arc = SP_ARC(item); + + return sp_arc_get_xy(arc, ge->start); +} + +static void +sp_arc_end_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12); + + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + SPArc *arc = SP_ARC(item); + + ge->closed = (sp_genericellipse_side(ge, p) == -1) ? TRUE : FALSE; + + NR::Point delta = p - NR::Point(ge->cx.computed, ge->cy.computed); + NR::scale sc(ge->rx.computed, ge->ry.computed); + ge->end = atan2(delta * sc.inverse()); + if ( ( state & GDK_CONTROL_MASK ) + && snaps ) + { + ge->end = sp_round(ge->end, M_PI/snaps); + } + sp_genericellipse_normalize(ge); + ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static NR::Point sp_arc_end_get(SPItem *item) +{ + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + SPArc *arc = SP_ARC(item); + + return sp_arc_get_xy(arc, ge->end); +} + +static void +sp_arc_startend_click(SPItem *item, guint state) +{ + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + + if (state & GDK_SHIFT_MASK) { + ge->end = ge->start = 0; + ((SPObject *)ge)->updateRepr(); + } +} + + +static void +sp_arc_rx_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + SPArc *arc = SP_ARC(item); + + ge->rx.computed = fabs( ge->cx.computed - p[NR::X] ); + + if ( state & GDK_CONTROL_MASK ) { + ge->ry.computed = ge->rx.computed; + } + + ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static NR::Point sp_arc_rx_get(SPItem *item) +{ + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + + return (NR::Point(ge->cx.computed, ge->cy.computed) - NR::Point(ge->rx.computed, 0)); +} + +static void +sp_arc_ry_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + SPArc *arc = SP_ARC(item); + + ge->ry.computed = fabs( ge->cy.computed - p[NR::Y] ); + + if ( state & GDK_CONTROL_MASK ) { + ge->rx.computed = ge->ry.computed; + } + + ((SPObject *)arc)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static NR::Point sp_arc_ry_get(SPItem *item) +{ + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + + return (NR::Point(ge->cx.computed, ge->cy.computed) - NR::Point(0, ge->ry.computed)); +} + +static void +sp_arc_rx_click(SPItem *item, guint state) +{ + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + + if (state & GDK_CONTROL_MASK) { + ge->ry.computed = ge->rx.computed; + ((SPObject *)ge)->updateRepr(); + } +} + +static void +sp_arc_ry_click(SPItem *item, guint state) +{ + SPGenericEllipse *ge = SP_GENERICELLIPSE(item); + + if (state & GDK_CONTROL_MASK) { + ge->rx.computed = ge->ry.computed; + ((SPObject *)ge)->updateRepr(); + } +} + +static SPKnotHolder * +sp_arc_knot_holder(SPItem *item, SPDesktop *desktop) +{ + SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL); + + sp_knot_holder_add_full(knot_holder, sp_arc_rx_set, sp_arc_rx_get, sp_arc_rx_click, + SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR, + _("Adjust ellipse <b>width</b>, with <b>Ctrl</b> to make circle")); + sp_knot_holder_add_full(knot_holder, sp_arc_ry_set, sp_arc_ry_get, sp_arc_ry_click, + SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR, + _("Adjust ellipse <b>height</b>, with <b>Ctrl</b> to make circle")); + sp_knot_holder_add_full(knot_holder, sp_arc_start_set, sp_arc_start_get, sp_arc_startend_click, + SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR, + _("Position the <b>start point</b> of the arc or segment; with <b>Ctrl</b> to snap angle; drag <b>inside</b> the ellipse for arc, <b>outside</b> for segment")); + sp_knot_holder_add_full(knot_holder, sp_arc_end_set, sp_arc_end_get, sp_arc_startend_click, + SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR, + _("Position the <b>end point</b> of the arc or segment; with <b>Ctrl</b> to snap angle; drag <b>inside</b> the ellipse for arc, <b>outside</b> for segment")); + + sp_pat_knot_holder(item, knot_holder); + + return knot_holder; +} + +/* SPStar */ + +static void +sp_star_knot1_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPStar *star = SP_STAR(item); + + NR::Point d = p - star->center; + + double arg1 = atan2(d); + double darg1 = arg1 - star->arg[0]; + + if (state & GDK_MOD1_MASK) { + star->randomized = darg1/(star->arg[0] - star->arg[1]); + } else if (state & GDK_SHIFT_MASK) { + star->rounded = darg1/(star->arg[0] - star->arg[1]); + } else if (state & GDK_CONTROL_MASK) { + star->r[0] = L2(d); + } else { + star->r[0] = L2(d); + star->arg[0] = arg1; + star->arg[1] += darg1; + } + ((SPObject *)star)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static void +sp_star_knot2_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPStar *star = SP_STAR(item); + if (star->flatsided == false) { + NR::Point d = p - star->center; + + double arg1 = atan2(d); + double darg1 = arg1 - star->arg[1]; + + if (state & GDK_MOD1_MASK) { + star->randomized = darg1/(star->arg[0] - star->arg[1]); + } else if (state & GDK_SHIFT_MASK) { + star->rounded = fabs(darg1/(star->arg[0] - star->arg[1])); + } else if (state & GDK_CONTROL_MASK) { + star->r[1] = L2(d); + star->arg[1] = star->arg[0] + M_PI / star->sides; + } + else { + star->r[1] = L2(d); + star->arg[1] = atan2(d); + } + ((SPObject *)star)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); + } +} + +static NR::Point sp_star_knot1_get(SPItem *item) +{ + g_assert(item != NULL); + + SPStar *star = SP_STAR(item); + + return sp_star_get_xy(star, SP_STAR_POINT_KNOT1, 0); + +} + +static NR::Point sp_star_knot2_get(SPItem *item) +{ + g_assert(item != NULL); + + SPStar *star = SP_STAR(item); + + return sp_star_get_xy(star, SP_STAR_POINT_KNOT2, 0); +} + +static void +sp_star_knot_click(SPItem *item, guint state) +{ + SPStar *star = SP_STAR(item); + + if (state & GDK_MOD1_MASK) { + star->randomized = 0; + ((SPObject *)star)->updateRepr(); + } else if (state & GDK_SHIFT_MASK) { + star->rounded = 0; + ((SPObject *)star)->updateRepr(); + } else if (state & GDK_CONTROL_MASK) { + star->arg[1] = star->arg[0] + M_PI / star->sides; + ((SPObject *)star)->updateRepr(); + } +} + +static SPKnotHolder * +sp_star_knot_holder(SPItem *item, SPDesktop *desktop) +{ + /* we don't need to get parent knot_holder */ + SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL); + g_assert(item != NULL); + + SPStar *star = SP_STAR(item); + + sp_knot_holder_add(knot_holder, sp_star_knot1_set, sp_star_knot1_get, sp_star_knot_click, + _("Adjust the <b>tip radius</b> of the star or polygon; with <b>Shift</b> to round; with <b>Alt</b> to randomize")); + if (star->flatsided == false) + sp_knot_holder_add(knot_holder, sp_star_knot2_set, sp_star_knot2_get, sp_star_knot_click, + _("Adjust the <b>base radius</b> of the star; with <b>Ctrl</b> to keep star rays radial (no skew); with <b>Shift</b> to round; with <b>Alt</b> to randomize")); + + sp_pat_knot_holder(item, knot_holder); + + return knot_holder; +} + +/* SPSpiral */ + +/* + * set attributes via inner (t=t0) knot point: + * [default] increase/decrease inner point + * [shift] increase/decrease inner and outer arg synchronizely + * [control] constrain inner arg to round per PI/4 + */ +static void +sp_spiral_inner_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12); + + SPSpiral *spiral = SP_SPIRAL(item); + + gdouble dx = p[NR::X] - spiral->cx; + gdouble dy = p[NR::Y] - spiral->cy; + + if (state & GDK_MOD1_MASK) { + // adjust divergence by vertical drag, relative to rad + double new_exp = (spiral->rad + dy)/(spiral->rad); + spiral->exp = new_exp > 0? new_exp : 0; + } else { + // roll/unroll from inside + gdouble arg_t0; + sp_spiral_get_polar(spiral, spiral->t0, NULL, &arg_t0); + + gdouble arg_tmp = atan2(dy, dx) - arg_t0; + gdouble arg_t0_new = arg_tmp - floor((arg_tmp+M_PI)/(2.0*M_PI))*2.0*M_PI + arg_t0; + spiral->t0 = (arg_t0_new - spiral->arg) / (2.0*M_PI*spiral->revo); + + /* round inner arg per PI/snaps, if CTRL is pressed */ + if ( ( state & GDK_CONTROL_MASK ) + && ( fabs(spiral->revo) > SP_EPSILON_2 ) + && ( snaps != 0 ) ) { + gdouble arg = 2.0*M_PI*spiral->revo*spiral->t0 + spiral->arg; + spiral->t0 = (sp_round(arg, M_PI/snaps) - spiral->arg)/(2.0*M_PI*spiral->revo); + } + + spiral->t0 = CLAMP(spiral->t0, 0.0, 0.999); + } + + ((SPObject *)spiral)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +/* + * set attributes via outer (t=1) knot point: + * [default] increase/decrease revolution factor + * [control] constrain inner arg to round per PI/4 + */ +static void +sp_spiral_outer_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + int snaps = prefs_get_int_attribute("options.rotationsnapsperpi", "value", 12); + + SPSpiral *spiral = SP_SPIRAL(item); + + gdouble dx = p[NR::X] - spiral->cx; + gdouble dy = p[NR::Y] - spiral->cy; + + if (state & GDK_SHIFT_MASK) { // rotate without roll/unroll + spiral->arg = atan2(dy, dx) - 2.0*M_PI*spiral->revo; + if (!(state & GDK_MOD1_MASK)) { + // if alt not pressed, change also rad; otherwise it is locked + spiral->rad = MAX(hypot(dx, dy), 0.001); + } + if ( ( state & GDK_CONTROL_MASK ) + && snaps ) { + spiral->arg = sp_round(spiral->arg, M_PI/snaps); + } + } else { // roll/unroll + // arg of the spiral outer end + double arg_1; + sp_spiral_get_polar(spiral, 1, NULL, &arg_1); + + // its fractional part after the whole turns are subtracted + double arg_r = arg_1 - sp_round(arg_1, 2.0*M_PI); + + // arg of the mouse point relative to spiral center + double mouse_angle = atan2(dy, dx); + if (mouse_angle < 0) + mouse_angle += 2*M_PI; + + // snap if ctrl + if ( ( state & GDK_CONTROL_MASK ) && snaps ) { + mouse_angle = sp_round(mouse_angle, M_PI/snaps); + } + + // by how much we want to rotate the outer point + double diff = mouse_angle - arg_r; + if (diff > M_PI) + diff -= 2*M_PI; + else if (diff < -M_PI) + diff += 2*M_PI; + + // calculate the new rad; + // the value of t corresponding to the angle arg_1 + diff: + double t_temp = ((arg_1 + diff) - spiral->arg)/(2*M_PI*spiral->revo); + // the rad at that t: + double rad_new = 0; + if (t_temp > spiral->t0) + sp_spiral_get_polar(spiral, t_temp, &rad_new, NULL); + + // change the revo (converting diff from radians to the number of turns) + spiral->revo += diff/(2*M_PI); + if (spiral->revo < 1e-3) + spiral->revo = 1e-3; + + // if alt not pressed and the values are sane, change the rad + if (!(state & GDK_MOD1_MASK) && rad_new > 1e-3 && rad_new/spiral->rad < 2) { + // adjust t0 too so that the inner point stays unmoved + double r0; + sp_spiral_get_polar(spiral, spiral->t0, &r0, NULL); + spiral->rad = rad_new; + spiral->t0 = pow(r0 / spiral->rad, 1.0/spiral->exp); + } + if (!isFinite(spiral->t0)) spiral->t0 = 0.0; + spiral->t0 = CLAMP(spiral->t0, 0.0, 0.999); + } + + ((SPObject *)spiral)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + +static NR::Point sp_spiral_inner_get(SPItem *item) +{ + SPSpiral *spiral = SP_SPIRAL(item); + + return sp_spiral_get_xy(spiral, spiral->t0); +} + +static NR::Point sp_spiral_outer_get(SPItem *item) +{ + SPSpiral *spiral = SP_SPIRAL(item); + + return sp_spiral_get_xy(spiral, 1.0); +} + +static void +sp_spiral_inner_click(SPItem *item, guint state) +{ + SPSpiral *spiral = SP_SPIRAL(item); + + if (state & GDK_MOD1_MASK) { + spiral->exp = 1; + ((SPObject *)spiral)->updateRepr(); + } else if (state & GDK_SHIFT_MASK) { + spiral->t0 = 0; + ((SPObject *)spiral)->updateRepr(); + } +} + +static SPKnotHolder * +sp_spiral_knot_holder(SPItem *item, SPDesktop *desktop) +{ + SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL); + + sp_knot_holder_add(knot_holder, sp_spiral_inner_set, sp_spiral_inner_get, sp_spiral_inner_click, + _("Roll/unroll the spiral from <b>inside</b>; with <b>Ctrl</b> to snap angle; with <b>Alt</b> to converge/diverge")); + sp_knot_holder_add(knot_holder, sp_spiral_outer_set, sp_spiral_outer_get, NULL, + _("Roll/unroll the spiral from <b>outside</b>; with <b>Ctrl</b> to snap angle; with <b>Shift</b> to scale/rotate")); + + sp_pat_knot_holder(item, knot_holder); + + return knot_holder; +} + +/* SPOffset */ + +static void +sp_offset_offset_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPOffset *offset = SP_OFFSET(item); + + offset->rad = sp_offset_distance_to_original(offset, p); + offset->knot = p; + offset->knotSet = true; + + ((SPObject *)offset)->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG); +} + + +static NR::Point sp_offset_offset_get(SPItem *item) +{ + SPOffset *offset = SP_OFFSET(item); + + NR::Point np; + sp_offset_top_point(offset,&np); + return np; +} + +static SPKnotHolder * +sp_offset_knot_holder(SPItem *item, SPDesktop *desktop) +{ + SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL); + + sp_knot_holder_add(knot_holder, sp_offset_offset_set, sp_offset_offset_get, NULL, + _("Adjust the <b>offset distance</b>")); + + sp_pat_knot_holder(item, knot_holder); + + return knot_holder; +} + +static SPKnotHolder * +sp_path_knot_holder(SPItem *item, SPDesktop *desktop) // FIXME: eliminate, instead make a pattern-drag similar to gradient-drag +{ + if ((SP_OBJECT(item)->style->fill.type == SP_PAINT_TYPE_PAINTSERVER) + && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style))) + { + SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, item, NULL); + + sp_pat_knot_holder(item, knot_holder); + + return knot_holder; + } + return NULL; +} + +static void +sp_pat_knot_holder(SPItem *item, SPKnotHolder *knot_holder) +{ + if ((SP_OBJECT(item)->style->fill.type == SP_PAINT_TYPE_PAINTSERVER) + && SP_IS_PATTERN(SP_STYLE_FILL_SERVER(SP_OBJECT(item)->style))) + { + sp_knot_holder_add_full(knot_holder, sp_pattern_xy_set, sp_pattern_xy_get, NULL, SP_KNOT_SHAPE_CROSS, SP_KNOT_MODE_XOR, + // TRANSLATORS: This refers to the pattern that's inside the object + _("<b>Move</b> the pattern fill inside the object")); + sp_knot_holder_add_full(knot_holder, sp_pattern_scale_set, sp_pattern_scale_get, NULL, SP_KNOT_SHAPE_SQUARE, SP_KNOT_MODE_XOR, + _("<b>Scale</b> the pattern fill uniformly")); + sp_knot_holder_add_full(knot_holder, sp_pattern_angle_set, sp_pattern_angle_get, NULL, SP_KNOT_SHAPE_CIRCLE, SP_KNOT_MODE_XOR, + _("<b>Rotate</b> the pattern fill; with <b>Ctrl</b> to snap angle")); + } +} + +static NR::Point sp_flowtext_corner_get(SPItem *item) +{ + SPRect *rect = SP_RECT(item); + + return NR::Point(rect->x.computed + rect->width.computed, rect->y.computed + rect->height.computed); +} + +static void +sp_flowtext_corner_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state) +{ + SPRect *rect = SP_RECT(item); + + sp_rect_wh_set_internal(rect, p, origin, state); +} + +static SPKnotHolder * +sp_flowtext_knot_holder(SPItem *item, SPDesktop *desktop) +{ + SPKnotHolder *knot_holder = sp_knot_holder_new(desktop, SP_FLOWTEXT(item)->get_frame(NULL), NULL); + + sp_knot_holder_add(knot_holder, sp_flowtext_corner_set, sp_flowtext_corner_get, NULL, + _("Drag to resize the <b>flowed text frame</b>")); + + return knot_holder; +} + + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 : |