X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;ds=sidebyside;f=src%2Fdisplay%2Fcanvas-grid.cpp;h=6c97e260594936025172c46e88a9d06fc6c62374;hb=9a3bd4fde0634126efeedaa71a0b66acf6ef07a2;hp=6618c2358a34ed0ac04e68c2f8de7224d40f56d7;hpb=6b15695578f07a3f72c4c9475c1a261a3021472a;p=inkscape.git diff --git a/src/display/canvas-grid.cpp b/src/display/canvas-grid.cpp index 6618c2358..6c97e2605 100644 --- a/src/display/canvas-grid.cpp +++ b/src/display/canvas-grid.cpp @@ -1,62 +1,79 @@ -#define SP_CANVAS_GRID_C +#define INKSCAPE_CANVAS_GRID_C /* - * SPCGrid * + * Copyright (C) Johan Engelen 2006-2007 * Copyright (C) Lauris Kaplinski 2000 * */ #include "sp-canvas-util.h" -#include "canvas-grid.h" #include "display-forward.h" #include +#include "desktop-handles.h" +#include "helper/units.h" +#include "svg/svg-color.h" +#include "xml/node-event-vector.h" +#include "sp-object.h" + +#include "sp-namedview.h" +#include "inkscape.h" +#include "desktop.h" + +#include "../document.h" + +#include "canvas-grid.h" +#include "canvas-axonomgrid.h" -enum { - ARG_0, - ARG_ORIGINX, - ARG_ORIGINY, - ARG_SPACINGX, - ARG_SPACINGY, - ARG_COLOR, - ARG_EMPCOLOR, - ARG_EMPSPACING +namespace Inkscape { + +#define DEFAULTGRIDCOLOR 0x0000FF20 +#define DEFAULTGRIDEMPCOLOR 0x0000FF40 + +const gchar *grid_name [] = { + N_("Rectangular grid"), + N_("Axonometric grid") +}; +const gchar *grid_svgname [] = { + "xygrid", + "axonomgrid" }; -static void sp_cgrid_class_init (SPCGridClass *klass); -static void sp_cgrid_init (SPCGrid *grid); -static void sp_cgrid_destroy (GtkObject *object); -static void sp_cgrid_set_arg (GtkObject *object, GtkArg *arg, guint arg_id); +// ########################################################## +// Grid CanvasItem +static void grid_canvasitem_class_init (GridCanvasItemClass *klass); +static void grid_canvasitem_init (GridCanvasItem *grid); +static void grid_canvasitem_destroy (GtkObject *object); -static void sp_cgrid_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags); -static void sp_cgrid_render (SPCanvasItem *item, SPCanvasBuf *buf); +static void grid_canvasitem_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags); +static void grid_canvasitem_render (SPCanvasItem *item, SPCanvasBuf *buf); static SPCanvasItemClass * parent_class; GtkType -sp_cgrid_get_type (void) +grid_canvasitem_get_type (void) { - static GtkType cgrid_type = 0; - - if (!cgrid_type) { - GtkTypeInfo cgrid_info = { - "SPCGrid", - sizeof (SPCGrid), - sizeof (SPCGridClass), - (GtkClassInitFunc) sp_cgrid_class_init, - (GtkObjectInitFunc) sp_cgrid_init, + static GtkType grid_canvasitem_type = 0; + + if (!grid_canvasitem_type) { + GtkTypeInfo grid_canvasitem_info = { + "GridCanvasItem", + sizeof (GridCanvasItem), + sizeof (GridCanvasItemClass), + (GtkClassInitFunc) grid_canvasitem_class_init, + (GtkObjectInitFunc) grid_canvasitem_init, NULL, NULL, (GtkClassInitFunc) NULL }; - cgrid_type = gtk_type_unique (sp_canvas_item_get_type (), &cgrid_info); + grid_canvasitem_type = gtk_type_unique (sp_canvas_item_get_type (), &grid_canvasitem_info); } - return cgrid_type; + return grid_canvasitem_type; } static void -sp_cgrid_class_init (SPCGridClass *klass) +grid_canvasitem_class_init (GridCanvasItemClass *klass) { GtkObjectClass *object_class; SPCanvasItemClass *item_class; @@ -66,86 +83,611 @@ sp_cgrid_class_init (SPCGridClass *klass) parent_class = (SPCanvasItemClass*)gtk_type_class (sp_canvas_item_get_type ()); - gtk_object_add_arg_type ("SPCGrid::originx", GTK_TYPE_DOUBLE, GTK_ARG_WRITABLE, ARG_ORIGINX); - gtk_object_add_arg_type ("SPCGrid::originy", GTK_TYPE_DOUBLE, GTK_ARG_WRITABLE, ARG_ORIGINY); - gtk_object_add_arg_type ("SPCGrid::spacingx", GTK_TYPE_DOUBLE, GTK_ARG_WRITABLE, ARG_SPACINGX); - gtk_object_add_arg_type ("SPCGrid::spacingy", GTK_TYPE_DOUBLE, GTK_ARG_WRITABLE, ARG_SPACINGY); - gtk_object_add_arg_type ("SPCGrid::color", GTK_TYPE_INT, GTK_ARG_WRITABLE, ARG_COLOR); - gtk_object_add_arg_type ("SPCGrid::empcolor", GTK_TYPE_INT, GTK_ARG_WRITABLE, ARG_EMPCOLOR); - gtk_object_add_arg_type ("SPCGrid::empspacing", GTK_TYPE_INT, GTK_ARG_WRITABLE, ARG_EMPSPACING); + object_class->destroy = grid_canvasitem_destroy; - object_class->destroy = sp_cgrid_destroy; - object_class->set_arg = sp_cgrid_set_arg; - - item_class->update = sp_cgrid_update; - item_class->render = sp_cgrid_render; + item_class->update = grid_canvasitem_update; + item_class->render = grid_canvasitem_render; } static void -sp_cgrid_init (SPCGrid *grid) +grid_canvasitem_init (GridCanvasItem *griditem) { - grid->origin[NR::X] = grid->origin[NR::Y] = 0.0; - grid->spacing[NR::X] = grid->spacing[NR::Y] = 8.0; - grid->color = 0x0000ff7f; - grid->empcolor = 0x3F3FFF40; - grid->empspacing = 5; + griditem->grid = NULL; } static void -sp_cgrid_destroy (GtkObject *object) +grid_canvasitem_destroy (GtkObject *object) { g_return_if_fail (object != NULL); - g_return_if_fail (SP_IS_CGRID (object)); + g_return_if_fail (INKSCAPE_IS_GRID_CANVASITEM (object)); if (GTK_OBJECT_CLASS (parent_class)->destroy) (* GTK_OBJECT_CLASS (parent_class)->destroy) (object); } +/** +*/ static void -sp_cgrid_set_arg (GtkObject *object, GtkArg *arg, guint arg_id) -{ - SPCanvasItem *item = SP_CANVAS_ITEM (object); - SPCGrid *grid = SP_CGRID (object); - - switch (arg_id) { - case ARG_ORIGINX: - grid->origin[NR::X] = GTK_VALUE_DOUBLE (* arg); - sp_canvas_item_request_update (item); - break; - case ARG_ORIGINY: - grid->origin[NR::Y] = GTK_VALUE_DOUBLE (* arg); - sp_canvas_item_request_update (item); - break; - case ARG_SPACINGX: - grid->spacing[NR::X] = GTK_VALUE_DOUBLE (* arg); - if (grid->spacing[NR::X] < 0.01) grid->spacing[NR::X] = 0.01; - sp_canvas_item_request_update (item); - break; - case ARG_SPACINGY: - grid->spacing[NR::Y] = GTK_VALUE_DOUBLE (* arg); - if (grid->spacing[NR::Y] < 0.01) grid->spacing[NR::Y] = 0.01; - sp_canvas_item_request_update (item); - break; - case ARG_COLOR: - grid->color = GTK_VALUE_INT (* arg); - sp_canvas_item_request_update (item); - break; - case ARG_EMPCOLOR: - grid->empcolor = GTK_VALUE_INT (* arg); - sp_canvas_item_request_update (item); - break; - case ARG_EMPSPACING: - grid->empspacing = GTK_VALUE_INT (* arg); - // std::cout << "Emphasis Spacing: " << grid->empspacing << std::endl; - sp_canvas_item_request_update (item); - break; - default: - break; +grid_canvasitem_render (SPCanvasItem * item, SPCanvasBuf * buf) +{ + GridCanvasItem *gridcanvasitem = INKSCAPE_GRID_CANVASITEM (item); + + sp_canvas_prepare_buffer (buf); + + if (gridcanvasitem->grid) gridcanvasitem->grid->Render(buf); +} + +static void +grid_canvasitem_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags) +{ + GridCanvasItem *gridcanvasitem = INKSCAPE_GRID_CANVASITEM (item); + + if (parent_class->update) + (* parent_class->update) (item, affine, flags); + + if (gridcanvasitem->grid) { + gridcanvasitem->grid->Update(affine, flags); + + sp_canvas_request_redraw (item->canvas, + -1000000, -1000000, + 1000000, 1000000); + + item->x1 = item->y1 = -1000000; + item->x2 = item->y2 = 1000000; + } +} + + + +// ########################################################## +// CanvasGrid + + static Inkscape::XML::NodeEventVector const _repr_events = { + NULL, /* child_added */ + NULL, /* child_removed */ + CanvasGrid::on_repr_attr_changed, + NULL, /* content_changed */ + NULL /* order_changed */ + }; + +CanvasGrid::CanvasGrid(SPNamedView * nv, Inkscape::XML::Node * in_repr, SPDocument *in_doc) +{ + repr = in_repr; + doc = in_doc; + if (repr) { + repr->addListener (&_repr_events, this); + } + + namedview = nv; + canvasitems = NULL; +} + +CanvasGrid::~CanvasGrid() +{ + if (repr) { + repr->removeListenerByData (this); + } + + while (canvasitems) { + gtk_object_destroy(GTK_OBJECT(canvasitems->data)); + canvasitems = g_slist_remove(canvasitems, canvasitems->data); + } +} + + + +const char * +CanvasGrid::getName(GridType type) +{ + return _(grid_name[type]); +} + +const char * +CanvasGrid::getSVGName(GridType type) +{ + return grid_svgname[type]; +} + +GridType +CanvasGrid::getGridTypeFromSVGName(const char * typestr) +{ + if (!typestr) return GRID_RECTANGULAR; + + gint t = 0; + for (t = GRID_MAXTYPENR; t >= 0; t--) { //this automatically defaults to grid0 which is rectangular grid + if (!strcmp(typestr, grid_svgname[t])) break; + } + return (GridType) t; +} + +GridType +CanvasGrid::getGridTypeFromName(const char * typestr) +{ + if (!typestr) return GRID_RECTANGULAR; + + gint t = 0; + for (t = GRID_MAXTYPENR; t >= 0; t--) { //this automatically defaults to grid0 which is rectangular grid + if (!strcmp(typestr, _(grid_name[t]))) break; + } + return (GridType) t; +} + + +/* +* writes an child to repr. +*/ +void +CanvasGrid::writeNewGridToRepr(Inkscape::XML::Node * repr, SPDocument * doc, GridType gridtype) +{ + if (!repr) return; + if (gridtype > GRID_MAXTYPENR) return; + + // first create the child xml node, then hook it to repr. This order is important, to not set off listeners to repr before the new node is complete. + + Inkscape::XML::Document *xml_doc = sp_document_repr_doc(doc); + Inkscape::XML::Node *newnode; + newnode = xml_doc->createElement("inkscape:grid"); + newnode->setAttribute("type", getSVGName(gridtype)); + + repr->appendChild(newnode); +// Inkscape::GC::release(repr); FIX THIS. THIS SHOULD BE HERE!!! + + sp_document_done(doc, SP_VERB_DIALOG_NAMEDVIEW, _("Create new grid")); +} + +/* +* Creates a new CanvasGrid object of type gridtype +*/ +CanvasGrid* +CanvasGrid::NewGrid(SPNamedView * nv, Inkscape::XML::Node * repr, SPDocument * doc, GridType gridtype) +{ + if (!repr) return NULL; + if (!doc) { + g_error("CanvasGrid::NewGrid - doc==NULL"); + return NULL; + } + + switch (gridtype) { + case GRID_RECTANGULAR: + return (CanvasGrid*) new CanvasXYGrid(nv, repr, doc); + case GRID_AXONOMETRIC: + return (CanvasGrid*) new CanvasAxonomGrid(nv, repr, doc); + } + + return NULL; +} + + +/** +* creates a new grid canvasitem for the SPDesktop given as parameter. Keeps a link to this canvasitem in the canvasitems list. +*/ +GridCanvasItem * +CanvasGrid::createCanvasItem(SPDesktop * desktop) +{ + if (!desktop) return NULL; + //Johan: I think for multiple desktops it is best if each has their own canvasitem, but share the same CanvasGrid object; that is what this function is for. + + // check if there is already a canvasitem on this desktop linking to this grid + for (GSList *l = canvasitems; l != NULL; l = l->next) { + if ( sp_desktop_gridgroup(desktop) == SP_CANVAS_GROUP(SP_CANVAS_ITEM(l->data)->parent) ) { + return NULL; + } + } + + GridCanvasItem * item = INKSCAPE_GRID_CANVASITEM( sp_canvas_item_new(sp_desktop_gridgroup(desktop), INKSCAPE_TYPE_GRID_CANVASITEM, NULL) ); + item->grid = this; + sp_canvas_item_show(SP_CANVAS_ITEM(item)); + + gtk_object_ref(GTK_OBJECT(item)); // since we're keeping a link to this item, we need to bump up the ref count + canvasitems = g_slist_prepend(canvasitems, item); + + return item; +} + +void +CanvasGrid::on_repr_attr_changed (Inkscape::XML::Node * repr, const gchar *key, const gchar *oldval, const gchar *newval, bool is_interactive, void * data) +{ + if (!data) + return; + + ((CanvasGrid*) data)->onReprAttrChanged(repr, key, oldval, newval, is_interactive); +} + + + +// ########################################################## +// CanvasXYGrid + + +/** +* "attach_all" function +* A DIRECT COPY-PASTE FROM DOCUMENT-PROPERTIES.CPP TO QUICKLY GET RESULTS +* + * Helper function that attachs widgets in a 3xn table. The widgets come in an + * array that has two entries per table row. The two entries code for four + * possible cases: (0,0) means insert space in first column; (0, non-0) means + * widget in columns 2-3; (non-0, 0) means label in columns 1-3; and + * (non-0, non-0) means two widgets in columns 2 and 3. +**/ +#define SPACE_SIZE_X 15 +#define SPACE_SIZE_Y 10 +static inline void +attach_all (Gtk::Table &table, const Gtk::Widget *arr[], unsigned size, int start = 0) +{ + for (unsigned i=0, r=start; i(*arr[i]), 1, 2, r, r+1, + Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0); + table.attach (const_cast(*arr[i+1]), 2, 3, r, r+1, + Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0); + } + else + { + if (arr[i+1]) + table.attach (const_cast(*arr[i+1]), 1, 3, r, r+1, + Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0); + else if (arr[i]) + { + Gtk::Label& label = reinterpret_cast (const_cast(*arr[i])); + label.set_alignment (0.0); + table.attach (label, 0, 3, r, r+1, + Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0); + } + else + { + Gtk::HBox *space = manage (new Gtk::HBox); + space->set_size_request (SPACE_SIZE_X, SPACE_SIZE_Y); + table.attach (*space, 0, 1, r, r+1, + (Gtk::AttachOptions)0, (Gtk::AttachOptions)0,0,0); + } + } + ++r; + } +} + +CanvasXYGrid::CanvasXYGrid (SPNamedView * nv, Inkscape::XML::Node * in_repr, SPDocument * in_doc) + : CanvasGrid(nv, in_repr, in_doc), table(1, 1) +{ + origin[NR::X] = origin[NR::Y] = 0.0; + color = DEFAULTGRIDCOLOR; + empcolor = DEFAULTGRIDEMPCOLOR; + empspacing = 5; + spacing[NR::X] = spacing[NR::Y] = 1.0; + gridunit = &sp_unit_get_by_id(SP_UNIT_PX); + render_dotted = false; + + snapper = new CanvasXYGridSnapper(this, namedview, 0); + + // initialize widgets: + vbox.set_border_width(2); + table.set_spacings(2); + vbox.pack_start(table, false, false, 0); + + _rumg.init (_("Grid _units:"), "units", _wr, repr, doc); + _rsu_ox.init (_("_Origin X:"), _("X coordinate of grid origin"), + "originx", _rumg, _wr, repr, doc); + _rsu_oy.init (_("O_rigin Y:"), _("Y coordinate of grid origin"), + "originy", _rumg, _wr, repr, doc); + _rsu_sx.init (_("Spacing _X:"), _("Distance between vertical grid lines"), + "spacingx", _rumg, _wr, repr, doc); + _rsu_sy.init (_("Spacing _Y:"), _("Distance between horizontal grid lines"), + "spacingy", _rumg, _wr, repr, doc); + _rcp_gcol.init (_("Grid line _color:"), _("Grid line color"), + _("Color of grid lines"), "color", "opacity", _wr, repr, doc); + _rcp_gmcol.init (_("Ma_jor grid line color:"), _("Major grid line color"), + _("Color of the major (highlighted) grid lines"), + "empcolor", "empopacity", _wr, repr, doc); + _rsi.init (_("_Major grid line every:"), _("lines"), "empspacing", _wr, repr, doc); + _rcb_dotted.init ( _("_Show dots instead of lines"), + _("If set, displays dots at gridpoints instead of gridlines"), + "dotted", _wr, false, repr, doc); + + const Gtk::Widget* widget_array[] = + { + _rumg._label, _rumg._sel, + 0, _rsu_ox.getSU(), + 0, _rsu_oy.getSU(), + 0, _rsu_sx.getSU(), + 0, _rsu_sy.getSU(), + _rcp_gcol._label, _rcp_gcol._cp, + 0, 0, + _rcp_gmcol._label, _rcp_gmcol._cp, + _rsi._label, &_rsi._hbox, + 0, _rcb_dotted._button, + }; + + attach_all (table, widget_array, sizeof(widget_array)); + + vbox.show(); + + if (repr) readRepr(); + updateWidgets(); +} + +CanvasXYGrid::~CanvasXYGrid () +{ + if (snapper) delete snapper; +} + + +/* fixme: Collect all these length parsing methods and think common sane API */ + +static gboolean sp_nv_read_length(const gchar *str, guint base, gdouble *val, const SPUnit **unit) +{ + if (!str) { + return FALSE; + } + + gchar *u; + gdouble v = g_ascii_strtod(str, &u); + if (!u) { + return FALSE; + } + while (isspace(*u)) { + u += 1; + } + + if (!*u) { + /* No unit specified - keep default */ + *val = v; + return TRUE; + } + + if (base & SP_UNIT_DEVICE) { + if (u[0] && u[1] && !isalnum(u[2]) && !strncmp(u, "px", 2)) { + *unit = &sp_unit_get_by_id(SP_UNIT_PX); + *val = v; + return TRUE; + } + } + + if (base & SP_UNIT_ABSOLUTE) { + if (!strncmp(u, "pt", 2)) { + *unit = &sp_unit_get_by_id(SP_UNIT_PT); + } else if (!strncmp(u, "mm", 2)) { + *unit = &sp_unit_get_by_id(SP_UNIT_MM); + } else if (!strncmp(u, "cm", 2)) { + *unit = &sp_unit_get_by_id(SP_UNIT_CM); + } else if (!strncmp(u, "m", 1)) { + *unit = &sp_unit_get_by_id(SP_UNIT_M); + } else if (!strncmp(u, "in", 2)) { + *unit = &sp_unit_get_by_id(SP_UNIT_IN); + } else { + return FALSE; + } + *val = v; + return TRUE; + } + + return FALSE; +} + +static gboolean sp_nv_read_opacity(const gchar *str, guint32 *color) +{ + if (!str) { + return FALSE; + } + + gchar *u; + gdouble v = g_ascii_strtod(str, &u); + if (!u) { + return FALSE; + } + v = CLAMP(v, 0.0, 1.0); + + *color = (*color & 0xffffff00) | (guint32) floor(v * 255.9999); + + return TRUE; +} + +/** If the passed scalar is invalid (<=0), then set the widget and the scalar + to use the given old value. + @param oldVal old value to use if the new one is invalid + @param pTarget the scalar to validate + @param widget widget associated with the scalar +*/ +static void validateScalar(double oldVal, + double* pTarget, + Inkscape::UI::Widget::RegisteredScalarUnit& widget) +{ + // Avoid nullness. + if ( pTarget == NULL ) + return; + + // Invalid new value? + if ( *pTarget <= 0 ) + { + // If the old value is somehow invalid as well, then default to 1. + if ( oldVal <= 0 ) + oldVal = 1; + + // Reset the scalar and associated widget to the old value. + *pTarget = oldVal; + widget.setValue( *pTarget); + } //if + +} //validateScalar + + +/** If the passed int is invalid (<=0), then set the widget and the int + to use the given old value. + @param oldVal old value to use if the new one is invalid + @param pTarget the int to validate + @param widget widget associated with the int +*/ +static void validateInt(gint oldVal, + gint* pTarget, + Inkscape::UI::Widget::RegisteredSuffixedInteger& widget) +{ + // Avoid nullness. + if ( pTarget == NULL ) + return; + + // Invalid new value? + if ( *pTarget <= 0 ) + { + // If the old value is somehow invalid as well, then default to 1. + if ( oldVal <= 0 ) + oldVal = 1; + + // Reset the int and associated widget to the old value. + *pTarget = oldVal; + widget.setValue( *pTarget); + } //if + +} //validateInt + +void +CanvasXYGrid::readRepr() +{ + char buff[100]; + gchar const* value; + if ( (value = repr->attribute("originx")) ) { + sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &origin[NR::X], &gridunit); + origin[NR::X] = sp_units_get_pixels(origin[NR::X], *(gridunit)); + + } + if ( (value = repr->attribute("originy")) ) { + sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &origin[NR::Y], &gridunit); + origin[NR::Y] = sp_units_get_pixels(origin[NR::Y], *(gridunit)); + } + + if ( (value = repr->attribute("spacingx")) ) { + double oldVal = spacing[NR::X]; + sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &spacing[NR::X], &gridunit); + validateScalar( oldVal, &spacing[NR::X], _rsu_sx ); + spacing[NR::X] = sp_units_get_pixels(spacing[NR::X], *(gridunit)); + + } + if ( (value = repr->attribute("spacingy")) ) { + double oldVal = spacing[NR::Y]; + sp_nv_read_length(value, SP_UNIT_ABSOLUTE | SP_UNIT_DEVICE, &spacing[NR::Y], &gridunit); + validateScalar( oldVal, &spacing[NR::Y], _rsu_sy ); + spacing[NR::Y] = sp_units_get_pixels(spacing[NR::Y], *(gridunit)); + + } + + if ( (value = repr->attribute("color")) ) { + color = (color & 0xff) | sp_svg_read_color(value, color); + } + + if ( (value = repr->attribute("empcolor")) ) { + empcolor = (empcolor & 0xff) | sp_svg_read_color(value, empcolor); + } + + if ( (value = repr->attribute("opacity")) ) { + sp_nv_read_opacity(value, &color); + } + if ( (value = repr->attribute("empopacity")) ) { + sp_nv_read_opacity(value, &empcolor); + } + + if ( (value = repr->attribute("empspacing")) ) { + gint oldVal = empspacing; + empspacing = atoi(value); + validateInt( oldVal, &empspacing, _rsi ); + } + + if ( (value = repr->attribute("dotted")) ) { + render_dotted = (strcmp(value,"true") == 0); + } + + for (GSList *l = canvasitems; l != NULL; l = l->next) { + sp_canvas_item_request_update ( SP_CANVAS_ITEM(l->data) ); + } + + return; +} + +/** + * Called when XML node attribute changed; updates dialog widgets if change was not done by widgets themselves. + */ +void +CanvasXYGrid::onReprAttrChanged (Inkscape::XML::Node * repr, const gchar *key, const gchar *oldval, const gchar *newval, bool is_interactive) +{ + readRepr(); + + if ( ! (_wr.isUpdating()) ) + updateWidgets(); +} + + + + +Gtk::Widget & +CanvasXYGrid::getWidget() +{ + return vbox; +} + + +/** + * Update dialog widgets from object's values. + */ +void +CanvasXYGrid::updateWidgets() +{ + if (_wr.isUpdating()) return; + + _wr.setUpdating (true); + + _rumg.setUnit (gridunit); + + gdouble val; + val = origin[NR::X]; + val = sp_pixels_get_units (val, *(gridunit)); + _rsu_ox.setValue (val); + val = origin[NR::Y]; + val = sp_pixels_get_units (val, *(gridunit)); + _rsu_oy.setValue (val); + val = spacing[NR::X]; + double gridx = sp_pixels_get_units (val, *(gridunit)); + _rsu_sx.setValue (gridx); + val = spacing[NR::Y]; + double gridy = sp_pixels_get_units (val, *(gridunit)); + _rsu_sy.setValue (gridy); + + _rcp_gcol.setRgba32 (color); + _rcp_gmcol.setRgba32 (empcolor); + _rsi.setValue (empspacing); + + _wr.setUpdating (false); + + return; +} + + + +void +CanvasXYGrid::Update (NR::Matrix const &affine, unsigned int flags) +{ + ow = origin * affine; + sw = spacing * affine; + sw -= NR::Point(affine[4], affine[5]); + + for(int dim = 0; dim < 2; dim++) { + gint scaling_factor = empspacing; + + if (scaling_factor <= 1) + scaling_factor = 5; + + scaled[dim] = FALSE; + sw[dim] = fabs (sw[dim]); + while (sw[dim] < 8.0) { + scaled[dim] = TRUE; + sw[dim] *= scaling_factor; + /* First pass, go up to the major line spacing, then + keep increasing by two. */ + scaling_factor = 2; + } } } + static void -sp_grid_hline (SPCanvasBuf *buf, gint y, gint xs, gint xe, guint32 rgba) +grid_hline (SPCanvasBuf *buf, gint y, gint xs, gint xe, guint32 rgba) { if ((y >= buf->rect.y0) && (y < buf->rect.y1)) { guint r, g, b, a; @@ -159,16 +701,16 @@ sp_grid_hline (SPCanvasBuf *buf, gint y, gint xs, gint xe, guint32 rgba) x1 = MIN (buf->rect.x1, xe + 1); p = buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + (x0 - buf->rect.x0) * 3; for (x = x0; x < x1; x++) { - p[0] = NR_COMPOSEN11 (r, a, p[0]); - p[1] = NR_COMPOSEN11 (g, a, p[1]); - p[2] = NR_COMPOSEN11 (b, a, p[2]); + p[0] = NR_COMPOSEN11_1111 (r, a, p[0]); + p[1] = NR_COMPOSEN11_1111 (g, a, p[1]); + p[2] = NR_COMPOSEN11_1111 (b, a, p[2]); p += 3; } } } static void -sp_grid_vline (SPCanvasBuf *buf, gint x, gint ys, gint ye, guint32 rgba) +grid_vline (SPCanvasBuf *buf, gint x, gint ys, gint ye, guint32 rgba) { if ((x >= buf->rect.x0) && (x < buf->rect.x1)) { guint r, g, b, a; @@ -182,120 +724,147 @@ sp_grid_vline (SPCanvasBuf *buf, gint x, gint ys, gint ye, guint32 rgba) y1 = MIN (buf->rect.y1, ye + 1); p = buf->buf + (y0 - buf->rect.y0) * buf->buf_rowstride + (x - buf->rect.x0) * 3; for (y = y0; y < y1; y++) { - p[0] = NR_COMPOSEN11 (r, a, p[0]); - p[1] = NR_COMPOSEN11 (g, a, p[1]); - p[2] = NR_COMPOSEN11 (b, a, p[2]); + p[0] = NR_COMPOSEN11_1111 (r, a, p[0]); + p[1] = NR_COMPOSEN11_1111 (g, a, p[1]); + p[2] = NR_COMPOSEN11_1111 (b, a, p[2]); p += buf->buf_rowstride; } } } -/** - \brief This function renders the grid on a particular canvas buffer - \param item The grid to render on the buffer - \param buf The buffer to render the grid on - - This function gets called a touch more than you might believe, - about once per tile. This means that it could probably be optimized - and help things out. - - Basically this function has to determine where in the canvas it is, - and how that associates with the grid. It does this first by looking - at the bounding box of the buffer, and then calculates where the grid - starts in that buffer. It will then step through grid lines until - it is outside of the buffer. - - For each grid line it is drawn using the function \c sp_grid_hline - or \c sp_grid_vline. These are convience functions for the sake - of making the function easier to read. - - Also, there are emphisized lines on the grid. While the \c syg and - \c sxg variable track grid positioning, the \c xlinestart and \c - ylinestart variables track the 'count' of what lines they are. If - that count is a multiple of the line seperation between emphisis - lines, then that line is drawn in the emphisis color. -*/ static void -sp_cgrid_render (SPCanvasItem * item, SPCanvasBuf * buf) +grid_dot (SPCanvasBuf *buf, gint x, gint y, guint32 rgba) { - SPCGrid *grid = SP_CGRID (item); - - sp_canvas_prepare_buffer (buf); - - const gdouble sxg = floor ((buf->rect.x0 - grid->ow[NR::X]) / grid->sw[NR::X]) * grid->sw[NR::X] + grid->ow[NR::X]; - const gint xlinestart = (gint) Inkscape::round((sxg - grid->ow[NR::X]) / grid->sw[NR::X]); - const gdouble syg = floor ((buf->rect.y0 - grid->ow[NR::Y]) / grid->sw[NR::Y]) * grid->sw[NR::Y] + grid->ow[NR::Y]; - const gint ylinestart = (gint) Inkscape::round((syg - grid->ow[NR::Y]) / grid->sw[NR::Y]); - - gint ylinenum; - gdouble y; - for (y = syg, ylinenum = ylinestart; y < buf->rect.y1; y += grid->sw[NR::Y], ylinenum++) { - const gint y0 = (gint) Inkscape::round(y); - const gint y1 = (gint) Inkscape::round(y + grid->sw[NR::Y]); + if ( (y >= buf->rect.y0) && (y < buf->rect.y1) + && (x >= buf->rect.x0) && (x < buf->rect.x1) ) { + guint r, g, b, a; + guchar *p; + r = NR_RGBA32_R (rgba); + g = NR_RGBA32_G (rgba); + b = NR_RGBA32_B (rgba); + a = NR_RGBA32_A (rgba); + p = buf->buf + (y - buf->rect.y0) * buf->buf_rowstride + (x - buf->rect.x0) * 3; + p[0] = NR_COMPOSEN11_1111 (r, a, p[0]); + p[1] = NR_COMPOSEN11_1111 (g, a, p[1]); + p[2] = NR_COMPOSEN11_1111 (b, a, p[2]); + } +} - if (!grid->scaled[NR::Y] && - (ylinenum % grid->empspacing) == 0) { - sp_grid_hline (buf, y0, buf->rect.x0, buf->rect.x1 - 1, grid->empcolor); - } else { - sp_grid_hline (buf, y0, buf->rect.x0, buf->rect.x1 - 1, grid->color); +void +CanvasXYGrid::Render (SPCanvasBuf *buf) +{ + const gdouble sxg = floor ((buf->rect.x0 - ow[NR::X]) / sw[NR::X]) * sw[NR::X] + ow[NR::X]; + const gint xlinestart = (gint) Inkscape::round((sxg - ow[NR::X]) / sw[NR::X]); + const gdouble syg = floor ((buf->rect.y0 - ow[NR::Y]) / sw[NR::Y]) * sw[NR::Y] + ow[NR::Y]; + const gint ylinestart = (gint) Inkscape::round((syg - ow[NR::Y]) / sw[NR::Y]); + + if (!render_dotted) { + gint ylinenum; + gdouble y; + for (y = syg, ylinenum = ylinestart; y < buf->rect.y1; y += sw[NR::Y], ylinenum++) { + const gint y0 = (gint) Inkscape::round(y); + + if (!scaled[NR::Y] && (ylinenum % empspacing) == 0) { + grid_hline (buf, y0, buf->rect.x0, buf->rect.x1 - 1, empcolor); + } else { + grid_hline (buf, y0, buf->rect.x0, buf->rect.x1 - 1, color); + } } - + gint xlinenum; gdouble x; - for (x = sxg, xlinenum = xlinestart; x < buf->rect.x1; x += grid->sw[NR::X], xlinenum++) { + for (x = sxg, xlinenum = xlinestart; x < buf->rect.x1; x += sw[NR::X], xlinenum++) { const gint ix = (gint) Inkscape::round(x); - if (!grid->scaled[NR::X] && - (xlinenum % grid->empspacing) == 0) { - sp_grid_vline (buf, ix, y0 + 1, y1 - 1, grid->empcolor); + if (!scaled[NR::X] && (xlinenum % empspacing) == 0) { + grid_vline (buf, ix, buf->rect.y0, buf->rect.y1, empcolor); } else { - sp_grid_vline (buf, ix, y0 + 1, y1 - 1, grid->color); + grid_vline (buf, ix, buf->rect.y0, buf->rect.y1, color); } } + } else { + gint ylinenum; + gdouble y; + for (y = syg, ylinenum = ylinestart; y < buf->rect.y1; y += sw[NR::Y], ylinenum++) { + const gint iy = (gint) Inkscape::round(y); + + gint xlinenum; + gdouble x; + for (x = sxg, xlinenum = xlinestart; x < buf->rect.x1; x += sw[NR::X], xlinenum++) { + const gint ix = (gint) Inkscape::round(x); + if ( (!scaled[NR::X] && (xlinenum % empspacing) == 0) + || (!scaled[NR::Y] && (ylinenum % empspacing) == 0) ) + { + grid_dot (buf, ix, iy, empcolor | (guint32)0x000000FF); // put alpha to max value + } + else + { + grid_dot (buf, ix, iy, color | (guint32)0x000000FF); // put alpha to max value + } + } + + } } } -static void -sp_cgrid_update (SPCanvasItem *item, NR::Matrix const &affine, unsigned int flags) + + + +/** + * \return x rounded to the nearest multiple of c1 plus c0. + * + * \note + * If c1==0 (and c0 is finite), then returns +/-inf. This makes grid spacing of zero + * mean "ignore the grid in this dimention". We're currently discussing "good" semantics + * for guide/grid snapping. + */ + +/* FIXME: move this somewhere else, perhaps */ +static double round_to_nearest_multiple_plus(double x, double const c1, double const c0) { - SPCGrid *grid = SP_CGRID (item); + return floor((x - c0) / c1 + .5) * c1 + c0; +} - if (parent_class->update) - (* parent_class->update) (item, affine, flags); +CanvasXYGridSnapper::CanvasXYGridSnapper(CanvasXYGrid *grid, SPNamedView const *nv, NR::Coord const d) : LineSnapper(nv, d) +{ + this->grid = grid; +} - grid->ow = grid->origin * affine; - grid->sw = grid->spacing * affine; - grid->sw -= NR::Point(affine[4], affine[5]); +LineSnapper::LineList +CanvasXYGridSnapper::_getSnapLines(NR::Point const &p) const +{ + LineList s; - for(int dim = 0; dim < 2; dim++) { - gint scaling_factor = grid->empspacing; + if ( grid == NULL ) { + return s; + } - if (scaling_factor <= 1) - scaling_factor = 5; + for (unsigned int i = 0; i < 2; ++i) { - grid->scaled[dim] = FALSE; - grid->sw[dim] = fabs (grid->sw[dim]); - while (grid->sw[dim] < 8.0) { - grid->scaled[dim] = TRUE; - grid->sw[dim] *= scaling_factor; - /* First pass, go up to the major line spacing, then - keep increasing by two. */ - scaling_factor = 2; + /* This is to make sure we snap to only visible grid lines */ + double scaled_spacing = grid->sw[i]; // this is spacing of visible lines if screen pixels + + // convert screen pixels to px + // FIXME: after we switch to snapping dist in screen pixels, this will be unnecessary + if (SP_ACTIVE_DESKTOP) { + scaled_spacing /= SP_ACTIVE_DESKTOP->current_zoom(); } - } - if (grid->empspacing == 0) { - grid->scaled[NR::Y] = TRUE; - grid->scaled[NR::X] = TRUE; + NR::Coord const rounded = round_to_nearest_multiple_plus(p[i], + scaled_spacing, + grid->origin[i]); + + s.push_back(std::make_pair(NR::Dim2(i), rounded)); } - sp_canvas_request_redraw (item->canvas, - -1000000, -1000000, - 1000000, 1000000); - - item->x1 = item->y1 = -1000000; - item->x2 = item->y2 = 1000000; + return s; } + + + + +}; /* namespace Inkscape */ + /* Local Variables: mode:c++