#if HAVE_CONFIG_H

# include "config.h"

#endif

#include <gtkmm/box.h>

#include <gtkmm/label.h>

#if WITH_GTKMM_3_0

# include <gtkmm/grid.h>

#else

# include <gtkmm/table.h>

#endif

#include <glibmm/i18n.h>

#include "ui/widget/registered-widget.h"

#include "desktop.h"

#include "sp-canvas-util.h"

#include "helper/mathfns.h"

#include "display/cairo-utils.h"

#include "display/canvas-axonomgrid.h"

#include "display/canvas-grid.h"

#include "display/sp-canvas-group.h"

#include "document.h"

#include "util/units.h"

#include "inkscape.h"

#include "preferences.h"

#include "sp-namedview.h"

#include "sp-object.h"

#include "sp-root.h"

#include "svg/svg-color.h"

#include "svg/stringstream.h"

#include "helper/mathfns.h"

#include "xml/node-event-vector.h"

#include "verbs.h"

#include "display/sp-canvas.h"

using Inkscape::DocumentUndo;

using Inkscape::Util::unit_table;

namespace Inkscape {

static gchar const *const grid_name[] = {

N_("Rectangular grid"),

N_("Axonometric grid")

};

static gchar const *const grid_svgname[] = {

"xygrid",

"axonomgrid"

};

static void grid_canvasitem_destroy(SPCanvasItem *object);

static void grid_canvasitem_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags);

static void grid_canvasitem_render (SPCanvasItem *item, SPCanvasBuf *buf);

G_DEFINE_TYPE(GridCanvasItem, grid_canvasitem, SP_TYPE_CANVAS_ITEM);

static void grid_canvasitem_class_init(GridCanvasItemClass *klass)

{

SPCanvasItemClass *item_class = (SPCanvasItemClass *) klass;

item_class->destroy = grid_canvasitem_destroy;

item_class->update = grid_canvasitem_update;

item_class->render = grid_canvasitem_render;

}

static void

grid_canvasitem_init (GridCanvasItem *griditem)

{

griditem->grid = NULL;

}

static void grid_canvasitem_destroy(SPCanvasItem *object)

{

g_return_if_fail (object != NULL);

g_return_if_fail (INKSCAPE_IS_GRID_CANVASITEM (object));

if (SP_CANVAS_ITEM_CLASS(grid_canvasitem_parent_class)->destroy)

(* SP_CANVAS_ITEM_CLASS(grid_canvasitem_parent_class)->destroy) (object);

}

static void

grid_canvasitem_render (SPCanvasItem * item, SPCanvasBuf * buf)

{

GridCanvasItem *gridcanvasitem = INKSCAPE_GRID_CANVASITEM (item);

if ( gridcanvasitem->grid && gridcanvasitem->grid->isVisible() ) {

sp_canvas_prepare_buffer (buf);

gridcanvasitem->grid->Render(buf);

}

}

static void

grid_canvasitem_update (SPCanvasItem *item, Geom::Affine const &affine, unsigned int flags)

{

GridCanvasItem *gridcanvasitem = INKSCAPE_GRID_CANVASITEM (item);

if (SP_CANVAS_ITEM_CLASS(grid_canvasitem_parent_class)->update)

SP_CANVAS_ITEM_CLASS(grid_canvasitem_parent_class)->update(item, affine, flags);

if (gridcanvasitem->grid) {

gridcanvasitem->grid->Update(affine, flags);

item->canvas->requestRedraw(-1000000, -1000000,

1000000, 1000000);

item->x1 = item->y1 = -1000000;

item->x2 = item->y2 = 1000000;

}

}

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, GridType type)

: visible(true), gridtype(type)

{

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) {

sp_canvas_item_destroy(SP_CANVAS_ITEM(canvasitems->data));

canvasitems = g_slist_remove(canvasitems, canvasitems->data);

}

}

const char *

CanvasGrid::getName() const

{

return _(grid_name[gridtype]);

}

const char *

CanvasGrid::getSVGName() const

{

return grid_svgname[gridtype];

}

CanvasGrid::getGridType() const

{

return gridtype;

}

char const *

CanvasGrid::getName(GridType type)

{

return _(grid_name[type]);

}

char const *

CanvasGrid::getSVGName(GridType type)

{

return grid_svgname[type];

}

CanvasGrid::getGridTypeFromSVGName(char const *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;

}

CanvasGrid::getGridTypeFromName(char const *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;

}

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 = doc->getReprDoc();

Inkscape::XML::Node *newnode;

newnode = xml_doc->createElement("inkscape:grid");

newnode->setAttribute("type", getSVGName(gridtype));

repr->appendChild(newnode);

Inkscape::GC::release(newnode);

DocumentUndo::done(doc, SP_VERB_DIALOG_NAMEDVIEW, _("Create new grid"));

}

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 dynamic_cast<CanvasGrid*>(new CanvasXYGrid(nv, repr, doc));

case GRID_AXONOMETRIC:

return dynamic_cast<CanvasGrid*>(new CanvasAxonomGrid(nv, repr, doc));

}

return NULL;

}

GridCanvasItem *

CanvasGrid::createCanvasItem(SPDesktop * desktop)

{

if (!desktop) return NULL;

// check if there is already a canvasitem on this desktop linking to this grid

for (GSList *l = canvasitems; l != NULL; l = l->next) {

if ( desktop->getGridGroup() == SP_CANVAS_GROUP(SP_CANVAS_ITEM(l->data)->parent) ) {

return NULL;

}

}

GridCanvasItem * item = INKSCAPE_GRID_CANVASITEM( sp_canvas_item_new(desktop->getGridGroup(), INKSCAPE_TYPE_GRID_CANVASITEM, NULL) );

item->grid = this;

sp_canvas_item_show(SP_CANVAS_ITEM(item));

g_object_ref(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;

}

Gtk::Widget *

CanvasGrid::newWidget()

{

Gtk::VBox * vbox = Gtk::manage( new Gtk::VBox() );

Gtk::Label * namelabel = Gtk::manage(new Gtk::Label("", Gtk::ALIGN_CENTER) );

Glib::ustring str("<b>");

str += getName();

str += "</b>";

namelabel->set_markup(str);

vbox->pack_start(*namelabel, true, true);

Inkscape::UI::Widget::RegisteredCheckButton * _rcb_enabled = Gtk::manage(

new Inkscape::UI::Widget::RegisteredCheckButton( _("_Enabled"),

_("Determines whether to snap to this grid or not. Can be 'on' for invisible grids."),

"enabled", _wr, false, repr, doc) );

Inkscape::UI::Widget::RegisteredCheckButton * _rcb_snap_visible_only = Gtk::manage(

new Inkscape::UI::Widget::RegisteredCheckButton( _("Snap to visible _grid lines only"),

_("When zoomed out, not all grid lines will be displayed. Only the visible ones will be snapped to"),

"snapvisiblegridlinesonly", _wr, true, repr, doc) );

Inkscape::UI::Widget::RegisteredCheckButton * _rcb_visible = Gtk::manage(

new Inkscape::UI::Widget::RegisteredCheckButton( _("_Visible"),

_("Determines whether the grid is displayed or not. Objects are still snapped to invisible grids."),

"visible", _wr, true, repr, doc) );

vbox->pack_start(*_rcb_enabled, true, true);

vbox->pack_start(*_rcb_visible, true, true);

vbox->pack_start(*_rcb_snap_visible_only, true, true);

Gtk::Widget * gridwdg = newSpecificWidget();

vbox->pack_start(*gridwdg, true, true);

std::list<Gtk::Widget*> slaves;

slaves.push_back(_rcb_visible);

slaves.push_back(_rcb_snap_visible_only);

slaves.push_back(gridwdg);

_rcb_enabled->setSlaveWidgets(slaves);

// set widget values

_wr.setUpdating (true);

_rcb_visible->setActive(visible);

if (snapper != NULL) {

_rcb_enabled->setActive(snapper->getEnabled());

_rcb_snap_visible_only->setActive(snapper->getSnapVisibleOnly());

}

_wr.setUpdating (false);

return dynamic_cast<Gtk::Widget *> (vbox);

}

CanvasGrid::on_repr_attr_changed(Inkscape::XML::Node *repr, gchar const *key, gchar const *oldval, gchar const *newval, bool is_interactive, void *data)

{

if (!data)

return;

(static_cast<CanvasGrid*>(data))->onReprAttrChanged(repr, key, oldval, newval, is_interactive);

}

bool CanvasGrid::isEnabled() const

{

if (snapper == NULL) {

return false;

}

return snapper->getEnabled();

}

void CanvasGrid::setOrigin(Geom::Point const &origin_px)

{

SPRoot *root = doc->getRoot();

double scale_x = 1.0;

double scale_y = 1.0;

if( root->viewBox_set ) {

scale_x = root->viewBox.width() / root->width.computed;

scale_y = root->viewBox.height() / root->height.computed;

}

// Write out in 'user-units'

Inkscape::SVGOStringStream os_x, os_y;

os_x << origin_px[Geom::X] * scale_x;

os_y << origin_px[Geom::Y] * scale_y;

repr->setAttribute("originx", os_x.str().c_str());

repr->setAttribute("originy", os_y.str().c_str());

}

#define SPACE_SIZE_X 15

#define SPACE_SIZE_Y 10

#if WITH_GTKMM_3_0

static inline void attach_all(Gtk::Grid &table, Gtk::Widget const *const arr[], unsigned size, int start = 0)

#else

static inline void attach_all(Gtk::Table &table, Gtk::Widget const *const arr[], unsigned size, int start = 0)

#endif

{

for (unsigned i=0, r=start; i<size/sizeof(Gtk::Widget*); i+=2) {

if (arr[i] && arr[i+1]) {

#if WITH_GTKMM_3_0

(const_cast<Gtk::Widget&>(*arr[i])).set_hexpand();

(const_cast<Gtk::Widget&>(*arr[i])).set_valign(Gtk::ALIGN_CENTER);

table.attach(const_cast<Gtk::Widget&>(*arr[i]), 1, r, 1, 1);

(const_cast<Gtk::Widget&>(*arr[i+1])).set_hexpand();

(const_cast<Gtk::Widget&>(*arr[i+1])).set_valign(Gtk::ALIGN_CENTER);

table.attach(const_cast<Gtk::Widget&>(*arr[i+1]), 2, r, 1, 1);

#else

table.attach (const_cast<Gtk::Widget&>(*arr[i]), 1, 2, r, r+1,

Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);

table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 2, 3, r, r+1,

Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);

#endif

} else {

if (arr[i+1]) {

#if WITH_GTKMM_3_0

(const_cast<Gtk::Widget&>(*arr[i+1])).set_hexpand();

(const_cast<Gtk::Widget&>(*arr[i+1])).set_valign(Gtk::ALIGN_CENTER);

table.attach(const_cast<Gtk::Widget&>(*arr[i+1]), 1, r, 2, 1);

#else

table.attach (const_cast<Gtk::Widget&>(*arr[i+1]), 1, 3, r, r+1,

Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);

#endif

} else if (arr[i]) {

Gtk::Label& label = reinterpret_cast<Gtk::Label&> (const_cast<Gtk::Widget&>(*arr[i]));

label.set_alignment (0.0);

#if WITH_GTKMM_3_0

label.set_hexpand();

label.set_valign(Gtk::ALIGN_CENTER);

table.attach(label, 0, r, 3, 1);

#else

table.attach (label, 0, 3, r, r+1,

Gtk::FILL|Gtk::EXPAND, (Gtk::AttachOptions)0,0,0);

#endif

} else {

Gtk::HBox *space = Gtk::manage (new Gtk::HBox);

space->set_size_request (SPACE_SIZE_X, SPACE_SIZE_Y);

#if WITH_GTKMM_3_0

space->set_halign(Gtk::ALIGN_CENTER);

space->set_valign(Gtk::ALIGN_CENTER);

table.attach(*space, 0, r, 1, 1);

#else

table.attach (*space, 0, 1, r, r+1,

(Gtk::AttachOptions)0, (Gtk::AttachOptions)0,0,0);

#endif

}

}

++r;

}

}

CanvasXYGrid::CanvasXYGrid (SPNamedView * nv, Inkscape::XML::Node * in_repr, SPDocument * in_doc)

: CanvasGrid(nv, in_repr, in_doc, GRID_RECTANGULAR)

{

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

gridunit = unit_table.getUnit(prefs->getString("/options/grids/xy/units"));

if (!gridunit) {

gridunit = unit_table.getUnit("px");

}

origin[Geom::X] = Inkscape::Util::Quantity::convert(prefs->getDouble("/options/grids/xy/origin_x", 0.0), gridunit, "px");

origin[Geom::Y] = Inkscape::Util::Quantity::convert(prefs->getDouble("/options/grids/xy/origin_y", 0.0), gridunit, "px");

color = prefs->getInt("/options/grids/xy/color", 0x0000ff20);

empcolor = prefs->getInt("/options/grids/xy/empcolor", 0x0000ff40);

empspacing = prefs->getInt("/options/grids/xy/empspacing", 5);

spacing[Geom::X] = Inkscape::Util::Quantity::convert(prefs->getDouble("/options/grids/xy/spacing_x", 0.0), gridunit, "px");

spacing[Geom::Y] = Inkscape::Util::Quantity::convert(prefs->getDouble("/options/grids/xy/spacing_y", 0.0), gridunit, "px");

render_dotted = prefs->getBool("/options/grids/xy/dotted", false);

snapper = new CanvasXYGridSnapper(this, &namedview->snap_manager, 0);

if (repr) readRepr();

}

CanvasXYGrid::~CanvasXYGrid ()

{

if (snapper) delete snapper;

}

static gboolean sp_nv_read_opacity(gchar const *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;

}

static void validateInt(gint oldVal,

gint* pTarget)

{

// 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;

} //if

} //validateInt

CanvasXYGrid::readRepr()

{

SPRoot *root = doc->getRoot();

double scale_x = 1.0;

double scale_y = 1.0;

if( root->viewBox_set ) {

scale_x = root->width.computed / root->viewBox.width();

scale_y = root->height.computed / root->viewBox.height();

if (Geom::are_near(scale_x / scale_y, 1.0, Geom::EPSILON)) {

// scaling is uniform, try to reduce numerical error

scale_x = (scale_x + scale_y)/2.0;

double scale_none = Inkscape::Util::Quantity::convert(1, doc->getDisplayUnit(), "px");

if (Geom::are_near(scale_x / scale_none, 1.0, Geom::EPSILON))

scale_x = scale_none; // objects are same size, reduce numerical error

scale_y = scale_x;

}

}

gchar const *value;

if ( (value = repr->attribute("originx")) ) {

Inkscape::Util::Quantity q = unit_table.parseQuantity(value);

if( q.unit->type == UNIT_TYPE_LINEAR ) {

// Legacy grid not in 'user units'

origin[Geom::X] = q.value("px");

} else {

// Grid in 'user units'

origin[Geom::X] = q.quantity * scale_x;

}

}

if ( (value = repr->attribute("originy")) ) {

Inkscape::Util::Quantity q = unit_table.parseQuantity(value);

if( q.unit->type == UNIT_TYPE_LINEAR ) {

// Legacy grid not in 'user units'

origin[Geom::Y] = q.value("px");

} else {

// Grid in 'user units'

origin[Geom::Y] = q.quantity * scale_y;

}

}

if ( (value = repr->attribute("spacingx")) ) {

// Ensure a valid default value

if( spacing[Geom::X] <= 0.0 )

spacing[Geom::X] = 1.0;

Inkscape::Util::Quantity q = unit_table.parseQuantity(value);

// Ensure a valid new value

if( q.quantity > 0 ) {

if( q.unit->type == UNIT_TYPE_LINEAR ) {

// Legacy grid not in 'user units'

spacing[Geom::X] = q.value("px");

} else {

// Grid in 'user units'

spacing[Geom::X] = q.quantity * scale_x;

}

}

}

if ( (value = repr->attribute("spacingy")) ) {

// Ensure a valid default value

if( spacing[Geom::Y] <= 0.0 )

spacing[Geom::Y] = 1.0;

Inkscape::Util::Quantity q = unit_table.parseQuantity(value);

// Ensure a valid new value

if( q.quantity > 0 ) {

if( q.unit->type == UNIT_TYPE_LINEAR ) {

// Legacy grid not in 'user units'

spacing[Geom::Y] = q.value("px");

} else {

// Grid in 'user units'

spacing[Geom::Y] = q.quantity * scale_y;

}

}

}

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);

}

if ( (value = repr->attribute("dotted")) ) {

render_dotted = (strcmp(value,"false") != 0 && strcmp(value, "0") != 0);

}

if ( (value = repr->attribute("visible")) ) {

visible = (strcmp(value,"false") != 0 && strcmp(value, "0") != 0);

}

if ( (value = repr->attribute("enabled")) ) {

g_assert(snapper != NULL);

snapper->setEnabled(strcmp(value,"false") != 0 && strcmp(value, "0") != 0);

}

if ( (value = repr->attribute("snapvisiblegridlinesonly")) ) {

g_assert(snapper != NULL);

snapper->setSnapVisibleOnly(strcmp(value,"false") != 0 && strcmp(value, "0") != 0);

}

if ( (value = repr->attribute("units")) ) {

gridunit = unit_table.getUnit(value); // Display unit identifier in grid menu

}

for (GSList *l = canvasitems; l != NULL; l = l->next) {

sp_canvas_item_request_update ( SP_CANVAS_ITEM(l->data) );

}

return;

}

CanvasXYGrid::onReprAttrChanged(Inkscape::XML::Node */*repr*/, gchar const */*key*/, gchar const */*oldval*/, gchar const */*newval*/, bool /*is_interactive*/)

{

readRepr();

if ( ! (_wr.isUpdating()) )

updateWidgets();

}

Gtk::Widget *

CanvasXYGrid::newSpecificWidget()

{

#if WITH_GTKMM_3_0

Gtk::Grid * table = Gtk::manage( new Gtk::Grid() );

table->set_row_spacing(2);

table->set_column_spacing(2);

#else

Gtk::Table * table = Gtk::manage( new Gtk::Table(1,1) );

table->set_spacings(2);

#endif

Inkscape::UI::Widget::RegisteredUnitMenu *_rumg = Gtk::manage( new Inkscape::UI::Widget::RegisteredUnitMenu(

_("Grid _units:"), "units", _wr, repr, doc) );

Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_ox = Gtk::manage( new Inkscape::UI::Widget::RegisteredScalarUnit(

_("_Origin X:"), _("X coordinate of grid origin"), "originx",

*_rumg, _wr, repr, doc, Inkscape::UI::Widget::RSU_x) );

Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_oy = Gtk::manage( new Inkscape::UI::Widget::RegisteredScalarUnit(

_("O_rigin Y:"), _("Y coordinate of grid origin"), "originy",

*_rumg, _wr, repr, doc, Inkscape::UI::Widget::RSU_y) );

Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_sx = Gtk::manage( new Inkscape::UI::Widget::RegisteredScalarUnit(

_("Spacing _X:"), _("Distance between vertical grid lines"), "spacingx",

*_rumg, _wr, repr, doc, Inkscape::UI::Widget::RSU_x) );

Inkscape::UI::Widget::RegisteredScalarUnit *_rsu_sy = Gtk::manage( new Inkscape::UI::Widget::RegisteredScalarUnit(

_("Spacing _Y:"), _("Distance between horizontal grid lines"), "spacingy",

*_rumg, _wr, repr, doc, Inkscape::UI::Widget::RSU_y) );

Inkscape::UI::Widget::RegisteredColorPicker *_rcp_gcol = Gtk::manage(

new Inkscape::UI::Widget::RegisteredColorPicker(

_("Minor grid line _color:"), _("Minor grid line color"), _("Color of the minor grid lines"),

"color", "opacity", _wr, repr, doc));

Inkscape::UI::Widget::RegisteredColorPicker *_rcp_gmcol = Gtk::manage(

new Inkscape::UI::Widget::RegisteredColorPicker(

_("Ma_jor grid line color:"), _("Major grid line color"),

_("Color of the major (highlighted) grid lines"), "empcolor", "empopacity",

_wr, repr, doc));

Inkscape::UI::Widget::RegisteredSuffixedInteger *_rsi = Gtk::manage( new Inkscape::UI::Widget::RegisteredSuffixedInteger(

_("_Major grid line every:"), "", _("lines"), "empspacing", _wr, repr, doc) );

_wr.setUpdating (true);

_rsu_ox->setDigits(5);

_rsu_ox->setIncrements(0.1, 1.0);

_rsu_oy->setDigits(5);

_rsu_oy->setIncrements(0.1, 1.0);

_rsu_sx->setDigits(5);

_rsu_sx->setIncrements(0.1, 1.0);

_rsu_sy->setDigits(5);

_rsu_sy->setIncrements(0.1, 1.0);

Inkscape::UI::Widget::RegisteredCheckButton * _rcb_dotted = Gtk::manage(

new Inkscape::UI::Widget::RegisteredCheckButton( _("_Show dots instead of lines"),

_("If set, displays dots at gridpoints instead of gridlines"),

"dotted", _wr, false, repr, doc) );

Gtk::Widget const *const widget_array[] = {

0, _rumg,

0, _rsu_ox,

0, _rsu_oy,

0, _rsu_sx,

0, _rsu_sy,

_rcp_gcol->_label, _rcp_gcol,

0, 0,

_rcp_gmcol->_label, _rcp_gmcol,

0, _rsi,

0, _rcb_dotted,

};

attach_all (*table, widget_array, sizeof(widget_array));

// set widget values

_rumg->setUnit (gridunit->abbr);

gdouble val;

val = origin[Geom::X];

val = Inkscape::Util::Quantity::convert(val, "px", gridunit);

_rsu_ox->setValue (val);

val = origin[Geom::Y];

val = Inkscape::Util::Quantity::convert(val, "px", gridunit);

_rsu_oy->setValue (val);

val = spacing[Geom::X];

double gridx = Inkscape::Util::Quantity::convert(val, "px", gridunit);

_rsu_sx->setValue (gridx);

val = spacing[Geom::Y];

double gridy = Inkscape::Util::Quantity::convert(val, "px", gridunit);

_rsu_sy->setValue (gridy);

_rcp_gcol->setRgba32 (color);

_rcp_gmcol->setRgba32 (empcolor);

_rsi->setValue (empspacing);

_rcb_dotted->setActive(render_dotted);

_wr.setUpdating (false);

_rsu_ox->setProgrammatically = false;

_rsu_oy->setProgrammatically = false;

_rsu_sx->setProgrammatically = false;

_rsu_sy->setProgrammatically = false;

return table;

}

CanvasXYGrid::updateWidgets()

{

}

CanvasXYGrid::Update (Geom::Affine const &affine, unsigned int /*flags*/)

{

ow = origin * affine;

sw = spacing * affine;

sw -= Geom::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

scaling_factor = 2;

}

}

}

static void

grid_hline (SPCanvasBuf *buf, gint y, gint xs, gint xe, guint32 rgba)

{

if ((y < buf->rect.top()) || (y >= buf->rect.bottom()))

return;

cairo_move_to(buf->ct, 0.5 + xs, 0.5 + y);

cairo_line_to(buf->ct, 0.5 + xe, 0.5 + y);

ink_cairo_set_source_rgba32(buf->ct, rgba);

cairo_stroke(buf->ct);

}

static void

grid_vline (SPCanvasBuf *buf, gint x, gint ys, gint ye, guint32 rgba)

{

if ((x < buf->rect.left()) || (x >= buf->rect.right()))

return;

cairo_move_to(buf->ct, 0.5 + x, 0.5 + ys);

cairo_line_to(buf->ct, 0.5 + x, 0.5 + ye);

ink_cairo_set_source_rgba32(buf->ct, rgba);

cairo_stroke(buf->ct);

}

static void

grid_dot (SPCanvasBuf *buf, gint x, gint y, guint32 rgba)

{

if ( (y < buf->rect.top()) || (y >= buf->rect.bottom())

|| (x < buf->rect.left()) || (x >= buf->rect.right()) )

return;

cairo_rectangle(buf->ct, x, y, 1, 1);

ink_cairo_set_source_rgba32(buf->ct, rgba);

cairo_fill(buf->ct);

}

CanvasXYGrid::Render (SPCanvasBuf *buf)

{

gdouble const sxg = floor ((buf->rect.left() - ow[Geom::X]) / sw[Geom::X]) * sw[Geom::X] + ow[Geom::X];

gint const xlinestart = round((sxg - ow[Geom::X]) / sw[Geom::X]);

gdouble const syg = floor ((buf->rect.top() - ow[Geom::Y]) / sw[Geom::Y]) * sw[Geom::Y] + ow[Geom::Y];

gint const ylinestart = round((syg - ow[Geom::Y]) / sw[Geom::Y]);

//set correct coloring, depending preference (when zoomed out, always major coloring or minor coloring)

Inkscape::Preferences *prefs = Inkscape::Preferences::get();

guint32 _empcolor;

bool no_emp_when_zoomed_out = prefs->getBool("/options/grids/no_emphasize_when_zoomedout", false);

if( (scaled[Geom::X] || scaled[Geom::Y]) && no_emp_when_zoomed_out ) {

_empcolor = color;

} else {

_empcolor = empcolor;

}

cairo_save(buf->ct);

cairo_translate(buf->ct, -buf->rect.left(), -buf->rect.top());

cairo_set_line_width(buf->ct, 1.0);

cairo_set_line_cap(buf->ct, CAIRO_LINE_CAP_SQUARE);

if (!render_dotted) {

gint ylinenum;

gdouble y;

for (y = syg, ylinenum = ylinestart; y < buf->rect.bottom(); y += sw[Geom::Y], ylinenum++) {

gint const y0 = round(y);

if (!scaled[Geom::Y] && (ylinenum % empspacing) != 0) {

grid_hline (buf, y0, buf->rect.left(), buf->rect.right() - 1, color);

} else {

grid_hline (buf, y0, buf->rect.left(), buf->rect.right() - 1, _empcolor);

}

}

gint xlinenum;

gdouble x;

for (x = sxg, xlinenum = xlinestart; x < buf->rect.right(); x += sw[Geom::X], xlinenum++) {

gint const ix = round(x);

if (!scaled[Geom::X] && (xlinenum % empspacing) != 0) {

grid_vline (buf, ix, buf->rect.top(), buf->rect.bottom(), color);

} else {

grid_vline (buf, ix, buf->rect.top(), buf->rect.bottom(), _empcolor);

}

}

} else {

gint ylinenum;

gdouble y;

for (y = syg, ylinenum = ylinestart; y < buf->rect.bottom(); y += sw[Geom::Y], ylinenum++) {

gint const iy = round(y);

gint xlinenum;

gdouble x;

for (x = sxg, xlinenum = xlinestart; x < buf->rect.right(); x += sw[Geom::X], xlinenum++) {

gint const ix = round(x);

if ( (!scaled[Geom::X] && (xlinenum % empspacing) != 0)

|| (!scaled[Geom::Y] && (ylinenum % empspacing) != 0)

|| ((scaled[Geom::X] || scaled[Geom::Y]) && no_emp_when_zoomed_out) )

{

grid_dot (buf, ix, iy, color | (guint32)0x000000FF); // put alpha to max value

} else {

gint const pitch = 1;

grid_dot (buf, ix-pitch, iy, _empcolor);

grid_dot (buf, ix+pitch, iy, _empcolor);

grid_dot (buf, ix, iy, _empcolor | (guint32)0x000000FF); // put alpha to max value

grid_dot (buf, ix, iy-pitch, _empcolor);

grid_dot (buf, ix, iy+pitch, _empcolor);

}

}

}

}

cairo_restore(buf->ct);

}

CanvasXYGridSnapper::CanvasXYGridSnapper(CanvasXYGrid *grid, SnapManager *sm, Geom::Coord const d) : LineSnapper(sm, d)

{

this->grid = grid;

}

Geom::Coord CanvasXYGridSnapper::getSnapperTolerance() const

{

SPDesktop const *dt = _snapmanager->getDesktop();

double const zoom = dt ? dt->current_zoom() : 1;

return _snapmanager->snapprefs.getGridTolerance() / zoom;

}

bool CanvasXYGridSnapper::getSnapperAlwaysSnap() const

{

return _snapmanager->snapprefs.getGridTolerance() == 10000; //TODO: Replace this threshold of 10000 by a constant; see also tolerance-slider.cpp

}

LineSnapper::LineList

CanvasXYGridSnapper::_getSnapLines(Geom::Point const &p) const

{

LineList s;

if ( grid == NULL ) {

return s;

}

for (unsigned int i = 0; i < 2; ++i) {

double spacing;

if (getSnapVisibleOnly()) {

// Only snapping to visible grid lines

spacing = grid->sw[i]; // this is the spacing of the visible grid lines measured in screen pixels

// convert screen pixels to px

// FIXME: after we switch to snapping dist in screen pixels, this will be unnecessary

SPDesktop const *dt = _snapmanager->getDesktop();

if (dt) {

spacing /= dt->current_zoom();

}

} else {

// Snapping to any grid line, whether it's visible or not

spacing = grid->spacing[i];

}

Geom::Coord rounded;

Geom::Point point_on_line;

Geom::Point cvec(0.,0.);

cvec[i] = 1.;

rounded = Inkscape::Util::round_to_upper_multiple_plus(p[i], spacing, grid->origin[i]);

point_on_line = i ? Geom::Point(0, rounded) : Geom::Point(rounded, 0);

s.push_back(std::make_pair(cvec, point_on_line));

rounded = Inkscape::Util::round_to_lower_multiple_plus(p[i], spacing, grid->origin[i]);

point_on_line = i ? Geom::Point(0, rounded) : Geom::Point(rounded, 0);

s.push_back(std::make_pair(cvec, point_on_line));

}

return s;

}

void CanvasXYGridSnapper::_addSnappedLine(IntermSnapResults &isr, Geom::Point const &snapped_point, Geom::Coord const &snapped_distance, SnapSourceType const &source, long source_num, Geom::Point const &normal_to_line, Geom::Point const &point_on_line) const

{

SnappedLine dummy = SnappedLine(snapped_point, snapped_distance, source, source_num, Inkscape::SNAPTARGET_GRID, getSnapperTolerance(), getSnapperAlwaysSnap(), normal_to_line, point_on_line);

isr.grid_lines.push_back(dummy);

}

void CanvasXYGridSnapper::_addSnappedPoint(IntermSnapResults &isr, Geom::Point const &snapped_point, Geom::Coord const &snapped_distance, SnapSourceType const &source, long source_num, bool constrained_snap) const

{

SnappedPoint dummy = SnappedPoint(snapped_point, source, source_num, Inkscape::SNAPTARGET_GRID, snapped_distance, getSnapperTolerance(), getSnapperAlwaysSnap(), constrained_snap, true);

isr.points.push_back(dummy);

}

void CanvasXYGridSnapper::_addSnappedLinePerpendicularly(IntermSnapResults &isr, Geom::Point const &snapped_point, Geom::Coord const &snapped_distance, SnapSourceType const &source, long source_num, bool constrained_snap) const

{

SnappedPoint dummy = SnappedPoint(snapped_point, source, source_num, Inkscape::SNAPTARGET_GRID_PERPENDICULAR, snapped_distance, getSnapperTolerance(), getSnapperAlwaysSnap(), constrained_snap, true);

isr.points.push_back(dummy);

}

bool CanvasXYGridSnapper::ThisSnapperMightSnap() const

{

return _snap_enabled && _snapmanager->snapprefs.isTargetSnappable(Inkscape::SNAPTARGET_GRID);

}

} // namespace Inkscape