canvas-axonomgrid.cpp revision d4d3b624d2d4a01877a37cbb3ec36279d6396e91
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * Copyright (C) 2006-2007 Johan Engelen <johan@shouraizou.nl>
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen * Current limits are: one axis (y-axis) is always vertical. The other two
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen * axes are bound to a certain range of angles. The z-axis always has an angle
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen * smaller than 90 degrees (measured from horizontal, 0 degrees being a line extending
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen * to the right). The x-axis will always have an angle between 0 and 90 degrees.
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * When I quickly think about it: all possibilities are probably covered this way. Eg.
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * a z-axis with negative angle can be replaced with an x-axis, etc.
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * TODO: LOTS LOTS LOTS. Clean up code. dirty as hell
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * THIS FILE AND THE HEADER FILE NEED HUGE CLEANING UP. PLEASE DO NOT HESISTATE TO DO SO.
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * For example: the line drawing code should not be here. There _must_ be a function somewhere else that can provide this functionality...
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen#define SAFE_SETPIXEL //undefine this when it is certain that setpixel is never called with invalid params
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelenenum Dim3 { X=0, Y, Z };
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelenstatic double deg_to_rad(double deg) { return deg*M_PI/180.0;}
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen \brief This function renders a pixel on a particular buffer.
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen The topleft of the buffer equals
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen ( rect.x0 , rect.y0 ) in screen coordinates
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen ( 0 , 0 ) in setpixel coordinates
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen The bottomright of the buffer equals
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen ( rect.x1 , rect,y1 ) in screen coordinates
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen ( rect.x1 - rect.x0 , rect.y1 - rect.y0 ) in setpixel coordinates
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelensp_caxonomgrid_setpixel (SPCanvasBuf *buf, gint x, gint y, guint32 rgba)
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen if ( (x >= buf->rect.x0) && (x < buf->rect.x1) && (y >= buf->rect.y0) && (y < buf->rect.y1) ) {
ea8dd7683dd12883474f6cf9b5f424f8ed831166Kris guchar * p = buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + (x - buf->rect.x0) * 3;
ea8dd7683dd12883474f6cf9b5f424f8ed831166Kris p[0] = NR_COMPOSEN11_1111 (r, a, p[0]);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen \brief This function renders a line on a particular canvas buffer,
c3a8ad9235ff81909bd472707550aef5b91daf7bjohanengelen using Bresenham's line drawing function.
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen http://www.cs.unc.edu/~mcmillan/comp136/Lecture6/Lines.html
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen Coordinates are interpreted as SCREENcoordinates
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelensp_caxonomgrid_drawline (SPCanvasBuf *buf, gint x0, gint y0, gint x1, gint y1, guint32 rgba)
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen if (dy < 0) { dy = -dy; stepy = -1; } else { stepy = 1; }
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen if (dx < 0) { dx = -dx; stepx = -1; } else { stepx = 1; }
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen int fraction = dy - (dx >> 1); // same as 2*dy - dx
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelensp_grid_vline (SPCanvasBuf *buf, gint x, gint ys, gint ye, guint32 rgba)
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen if ((x >= buf->rect.x0) && (x < buf->rect.x1)) {
76906e4a110b558e62eab96cd9549c2d8197123bKris p = buf->buf + (y0 - buf->rect.y0) * buf->buf_rowstride + (x - buf->rect.x0) * 3;
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen p[0] = NR_COMPOSEN11_1111 (r, a, p[0]);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen* A DIRECT COPY-PASTE FROM DOCUMENT-PROPERTIES.CPP TO QUICKLY GET RESULTS
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * Helper function that attachs widgets in a 3xn table. The widgets come in an
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * array that has two entries per table row. The two entries code for four
01d27eab5fca2dcb8e883011f8be77ae6b78a11cTed Gould * possible cases: (0,0) means insert space in first column; (0, non-0) means
01d27eab5fca2dcb8e883011f8be77ae6b78a11cTed Gould * widget in columns 2-3; (non-0, 0) means label in columns 1-3; and
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * (non-0, non-0) means two widgets in columns 2 and 3.
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelenstatic inline void
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelenattach_all(Gtk::Table &table, Gtk::Widget const *const arr[], unsigned size, int start = 0)
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop for (unsigned i=0, r=start; i<size/sizeof(Gtk::Widget*); i+=2) {
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop table.attach (const_cast<Gtk::Widget&>(*arr[i]), 1, 2, r, r+1,
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 2, 3, r, r+1,
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 1, 3, r, r+1,
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop } else if (arr[i]) {
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop Gtk::Label& label = reinterpret_cast<Gtk::Label&> (const_cast<Gtk::Widget&>(*arr[i]));
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop Gtk::HBox *space = manage (new Gtk::HBox);
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop space->set_size_request (SPACE_SIZE_X, SPACE_SIZE_Y);
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop (Gtk::AttachOptions)0, (Gtk::AttachOptions)0,0,0);
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van LieropCanvasAxonomGrid::CanvasAxonomGrid (SPNamedView * nv, Inkscape::XML::Node * in_repr, SPDocument * in_doc)
5918f7b9f787bca2f75167398884465c56b2fafdDiederik van Lierop : CanvasGrid(nv, in_repr, in_doc), table(1, 1)
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen snapper = new CanvasAxonomGridSnapper(this, namedview, 0);
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen // initialize widgets:
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen _rumg.init (_("Grid _units:"), "units", _wr, repr, doc);
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen _rsu_ox.init (_("_Origin X:"), _("X coordinate of grid origin"),
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen _rsu_oy.init (_("O_rigin Y:"), _("Y coordinate of grid origin"),
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen _rsu_sy.init (_("Spacing _Y:"), _("Base length of z-axis"),
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen _rsu_ax.init (_("Angle X:"), _("Angle of x-axis"),
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen _rsu_az.init (_("Angle Z:"), _("Angle of z-axis"),
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen _rcp_gcol.init (_("Grid line _color:"), _("Grid line color"),
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen _("Color of grid lines"), "color", "opacity", _wr, repr, doc);
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen _rcp_gmcol.init (_("Ma_jor grid line color:"), _("Major grid line color"),
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen _("Color of the major (highlighted) grid lines"),
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen _rsi.init (_("_Major grid line every:"), _("lines"), "empspacing", _wr, repr, doc);
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen attach_all (table, widget_array, sizeof(widget_array));
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen/* fixme: Collect all these length parsing methods and think common sane API */
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelenstatic gboolean sp_nv_read_length(gchar const *str, guint base, gdouble *val, SPUnit const **unit)
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen while (isspace(*u)) {
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen /* No unit specified - keep default */
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen if (u[0] && u[1] && !isalnum(u[2]) && !strncmp(u, "px", 2)) {
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelenstatic gboolean sp_nv_read_opacity(gchar const *str, guint32 *color)
1f37e9d97c3bb8cf02b2cc80af8dcfc9aba7c7b4johanengelen *color = (*color & 0xffffff00) | (guint32) floor(v * 255.9999);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &origin[NR::X], &gridunit);
6c3e745a94ef6b25a4ef9f018d350a7535aa45afTed Gould origin[NR::X] = sp_units_get_pixels(origin[NR::X], *(gridunit));
6c3e745a94ef6b25a4ef9f018d350a7535aa45afTed Gould sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &origin[NR::Y], &gridunit);
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen origin[NR::Y] = sp_units_get_pixels(origin[NR::Y], *(gridunit));
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &lengthy, &gridunit);
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen lengthy = sp_units_get_pixels(lengthy, *(gridunit));
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen if ( (value = repr->attribute("gridanglex")) ) {
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen if ( (value = repr->attribute("gridanglez")) ) {
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen color = (color & 0xff) | sp_svg_read_color(value, color);
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen empcolor = (empcolor & 0xff) | sp_svg_read_color(value, empcolor);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen if ( (value = repr->attribute("empspacing")) ) {
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen for (GSList *l = canvasitems; l != NULL; l = l->next) {
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen sp_canvas_item_request_update ( SP_CANVAS_ITEM(l->data) );
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen * Called when XML node attribute changed; updates dialog widgets if change was not done by widgets themselves.
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelenCanvasAxonomGrid::onReprAttrChanged(Inkscape::XML::Node */*repr*/, gchar const */*key*/, gchar const */*oldval*/, gchar const */*newval*/, bool /*is_interactive*/)
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen * Update dialog widgets from object's values.
98a704c566ce5a750d76d5fc9675ccc804ac65f5johanengelen //_rrb_gridtype.setValue (nv->gridtype);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen double gridy = sp_pixels_get_units (val, *(gridunit));
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelenCanvasAxonomGrid::Update (NR::Matrix const &affine, unsigned int /*flags*/)
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sw = NR::Point(fabs(affine[0]),fabs(affine[3]));
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // First pass, go up to the major line spacing, then
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // keep increasing by two.
07bda0b13ae048815f53f21ad1edbe3cc1b7e4e8Johan Engelen spacing_ylines = sw[NR::X] * lengthy /(tan_angle[X] + tan_angle[Z]);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // gc = gridcoordinates (the coordinates calculated from the grids origin 'grid->ow'.
01d27eab5fca2dcb8e883011f8be77ae6b78a11cTed Gould // sc = screencoordinates ( for example "buf->rect.x0" is in screencoordinates )
01d27eab5fca2dcb8e883011f8be77ae6b78a11cTed Gould // bc = buffer patch coordinates
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // tl = topleft ; br = bottomright
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // render the three separate line groups representing the main-axes:
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // x-axis always goes from topleft to bottomright. (0,0) - (1,1)
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gdouble const xintercept_y_bc = (buf_tl_gc[NR::X] * tan_angle[X]) - buf_tl_gc[NR::Y] ;
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gdouble const xstart_y_sc = ( xintercept_y_bc - floor(xintercept_y_bc/lyw)*lyw ) + buf->rect.y0;
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gint const xlinestart = (gint) Inkscape::round( (xstart_y_sc - ow[NR::Y]) / lyw );
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // lijnen vanaf linker zijkant.
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen for (y = xstart_y_sc, xlinenum = xlinestart; y < buf->rect.y1; y += lyw, xlinenum++) {
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gint const x1 = x0 + (gint) Inkscape::round( (buf->rect.y1 - y) / tan_angle[X] );
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_caxonomgrid_drawline (buf, x0, y0, x1, y1, empcolor);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_caxonomgrid_drawline (buf, x0, y0, x1, y1, color);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // lijnen vanaf bovenkant.
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gdouble const xstart_x_sc = buf->rect.x0 + (lxw_x - (xstart_y_sc - buf->rect.y0) / tan_angle[X]) ;
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen for (x = xstart_x_sc, xlinenum = xlinestart; x < buf->rect.x1; x += lxw_x, xlinenum--) {
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gint const x1 = x0 + (gint) Inkscape::round( (y1 - y0) / tan_angle[X] );
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_caxonomgrid_drawline (buf, x0, y0, x1, y1, empcolor);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_caxonomgrid_drawline (buf, x0, y0, x1, y1, color);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // y-axis lines (vertical)
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gdouble const ystart_x_sc = floor (buf_tl_gc[NR::X] / spacing_ylines) * spacing_ylines + ow[NR::X];
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gint const ylinestart = (gint) Inkscape::round((ystart_x_sc - ow[NR::X]) / spacing_ylines);
01d27eab5fca2dcb8e883011f8be77ae6b78a11cTed Gould for (x = ystart_x_sc, ylinenum = ylinestart; x < buf->rect.x1; x += spacing_ylines, ylinenum++) {
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_grid_vline (buf, x0, buf->rect.y0, buf->rect.y1 - 1, empcolor);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_grid_vline (buf, x0, buf->rect.y0, buf->rect.y1 - 1, color);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // z-axis always goes from bottomleft to topright. (0,1) - (1,0)
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gdouble const zintercept_y_bc = (buf_tl_gc[NR::X] * -tan_angle[Z]) - buf_tl_gc[NR::Y] ;
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen gdouble const zstart_y_sc = ( zintercept_y_bc - floor(zintercept_y_bc/lyw)*lyw ) + buf->rect.y0;
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gint const zlinestart = (gint) Inkscape::round( (zstart_y_sc - ow[NR::Y]) / lyw );
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen // lijnen vanaf linker zijkant.
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen for (y = zstart_y_sc, zlinenum = zlinestart; y < buf->rect.y1; y += lyw, zlinenum++) {
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen gint const x1 = x0 + (gint) Inkscape::round( (y - buf->rect.y0 ) / tan_angle[Z] );
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_caxonomgrid_drawline (buf, x0, y0, x1, y1, empcolor);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_caxonomgrid_drawline (buf, x0, y0, x1, y1, color);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // draw lines from bottom-up
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gdouble const zstart_x_sc = buf->rect.x0 + (y - buf->rect.y1) / tan_angle[Z] ;
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen for (x = zstart_x_sc; x < buf->rect.x1; x += lxw_z, zlinenum--) {
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen gint const x1 = x0 + (gint) Inkscape::round( (buf->rect.y1 - buf->rect.y0) / tan_angle[Z] );
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_caxonomgrid_drawline (buf, x0, y0, x1, y1, empcolor);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen sp_caxonomgrid_drawline (buf, x0, y0, x1, y1, color);
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * \return x rounded to the nearest multiple of c1 plus c0.
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen * If c1==0 (and c0 is finite), then returns +/-inf. This makes grid spacing of zero
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen * mean "ignore the grid in this dimention". We're currently discussing "good" semantics
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen * for guide/grid snapping.
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen/* FIXME: move this somewhere else, perhaps */
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelenstatic double round_to_nearest_multiple_plus(double x, double const c1, double const c0)
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelenCanvasAxonomGridSnapper::CanvasAxonomGridSnapper(CanvasAxonomGrid *grid, SPNamedView const *nv, NR::Coord const d) : LineSnapper(nv, d)
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelenCanvasAxonomGridSnapper::_getSnapLines(NR::Point const &p) const
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen for (unsigned int i = 0; i < 2; ++i) {
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen /* This is to make sure we snap to only visible grid lines */
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen double scaled_spacing = grid->sw[i]; // this is spacing of visible lines if screen pixels
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // convert screen pixels to px
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen // FIXME: after we switch to snapping dist in screen pixels, this will be unnecessary
ed0798e33e14e86b60f8cd254d7131f9d83ba8c0johanengelen scaled_spacing /= SP_ACTIVE_DESKTOP->current_zoom();
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen NR::Coord const rounded = round_to_nearest_multiple_plus(p[i],
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen s.push_back(std::make_pair(NR::Dim2(i), rounded));
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen}; // namespace Inkscape
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen Local Variables:
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen c-file-style:"stroustrup"
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
d37634d73670180f99a3e0ea583621373d90ec4fJohan Engelen indent-tabs-mode:nil
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen fill-column:99
29684a16b6c92bee28a94fdc2607bcc143950fa8johanengelen// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :