1 /**
2 \file grid.cpp
4 A plug-in to add a grid creation effect into Inkscape.
5 */
6 /*
7 * Copyright (C) 2004-2005 Ted Gould <ted@gould.cx>
8 * Copyright (C) 2007 MenTaLguY <mental@rydia.net>
9 * Abhishek Sharma
10 *
11 * Released under GNU GPL, read the file 'COPYING' for more information
12 */
14 #include <gtkmm/box.h>
15 #include <gtkmm/adjustment.h>
16 #include <gtkmm/spinbutton.h>
18 #include "desktop.h"
19 #include "desktop-handles.h"
20 #include "selection.h"
21 #include "sp-object.h"
22 #include "util/glib-list-iterators.h"
24 #include "svg/path-string.h"
26 #include "extension/effect.h"
27 #include "extension/system.h"
30 #include "grid.h"
32 namespace Inkscape {
33 namespace Extension {
34 namespace Internal {
36 /**
37 \brief A function to allocated anything -- just an example here
38 \param module Unused
39 \return Whether the load was sucessful
40 */
41 bool
42 Grid::load (Inkscape::Extension::Extension */*module*/)
43 {
44 // std::cout << "Hey, I'm Grid, I'm loading!" << std::endl;
45 return TRUE;
46 }
48 namespace {
50 Glib::ustring build_lines(Geom::Rect bounding_area,
51 float offset[], float spacing[])
52 {
53 Geom::Point point_offset(0.0, 0.0);
55 SVG::PathString path_data;
57 for ( int axis = 0 ; axis < 2 ; ++axis ) {
58 point_offset[axis] = offset[axis];
60 for (Geom::Point start_point = bounding_area.min();
61 start_point[axis] + offset[axis] <= (bounding_area.max())[axis];
62 start_point[axis] += spacing[axis]) {
63 Geom::Point end_point = start_point;
64 end_point[1-axis] = (bounding_area.max())[1-axis];
66 path_data.moveTo(start_point + point_offset)
67 .lineTo(end_point + point_offset);
68 }
69 }
70 // std::cout << "Path data:" << path_data.c_str() << std::endl;
71 return path_data;
72 }
74 }
76 /**
77 \brief This actually draws the grid.
78 \param module The effect that was called (unused)
79 \param document What should be edited.
80 */
81 void
82 Grid::effect (Inkscape::Extension::Effect *module, Inkscape::UI::View::View *document, Inkscape::Extension::Implementation::ImplementationDocumentCache * /*docCache*/)
83 {
84 Inkscape::Selection * selection = ((SPDesktop *)document)->selection;
86 Geom::Rect bounding_area = Geom::Rect(Geom::Point(0,0), Geom::Point(100,100));
87 if (selection->isEmpty()) {
88 /* get page size */
89 SPDocument * doc = document->doc();
90 bounding_area = Geom::Rect( Geom::Point(0,0),
91 Geom::Point(doc->getWidth(), doc->getHeight()) );
92 } else {
93 Geom::OptRect bounds = selection->bounds();
94 if (bounds) {
95 bounding_area = *bounds;
96 }
98 gdouble doc_height = (document->doc())->getHeight();
99 Geom::Rect temprec = Geom::Rect(Geom::Point(bounding_area.min()[Geom::X], doc_height - bounding_area.min()[Geom::Y]),
100 Geom::Point(bounding_area.max()[Geom::X], doc_height - bounding_area.max()[Geom::Y]));
102 bounding_area = temprec;
103 }
105 float spacings[2] = { module->get_param_float("xspacing"),
106 module->get_param_float("yspacing") };
107 float line_width = module->get_param_float("lineWidth");
108 float offsets[2] = { module->get_param_float("xoffset"),
109 module->get_param_float("yoffset") };
111 Glib::ustring path_data("");
113 path_data = build_lines(bounding_area,
114 offsets, spacings);
115 Inkscape::XML::Document * xml_doc = document->doc()->getReprDoc();
117 //XML Tree being used directly here while it shouldn't be.
118 Inkscape::XML::Node * current_layer = static_cast<SPDesktop *>(document)->currentLayer()->getRepr();
119 Inkscape::XML::Node * path = xml_doc->createElement("svg:path");
121 path->setAttribute("d", path_data.c_str());
123 Glib::ustring style("fill:none;fill-opacity:0.75000000;fill-rule:evenodd;stroke:#000000;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1.0000000");
124 style += ";stroke-width:";
125 gchar floatstring[64];
126 std::ostringstream stringstream;
127 stringstream << line_width;
128 sprintf(floatstring, "%s", stringstream.str().c_str());
129 style += floatstring;
130 style += "pt";
131 path->setAttribute("style", style.c_str());
133 current_layer->appendChild(path);
134 Inkscape::GC::release(path);
136 return;
137 }
139 /** \brief A class to make an adjustment that uses Extension params */
140 class PrefAdjustment : public Gtk::Adjustment {
141 /** Extension that this relates to */
142 Inkscape::Extension::Extension * _ext;
143 /** The string which represents the parameter */
144 char * _pref;
145 public:
146 /** \brief Make the adjustment using an extension and the string
147 describing the parameter. */
148 PrefAdjustment(Inkscape::Extension::Extension * ext, char * pref) :
149 Gtk::Adjustment(0.0, 0.0, 10.0, 0.1), _ext(ext), _pref(pref) {
150 this->set_value(_ext->get_param_float(_pref));
151 this->signal_value_changed().connect(sigc::mem_fun(this, &PrefAdjustment::val_changed));
152 return;
153 };
155 void val_changed (void);
156 }; /* class PrefAdjustment */
158 /** \brief A function to respond to the value_changed signal from the
159 adjustment.
161 This function just grabs the value from the adjustment and writes
162 it to the parameter. Very simple, but yet beautiful.
163 */
164 void
165 PrefAdjustment::val_changed (void)
166 {
167 // std::cout << "Value Changed to: " << this->get_value() << std::endl;
168 _ext->set_param_float(_pref, this->get_value());
169 return;
170 }
172 /** \brief A function to get the prefences for the grid
173 \param moudule Module which holds the params
174 \param view Unused today - may get style information in the future.
176 Uses AutoGUI for creating the GUI.
177 */
178 Gtk::Widget *
179 Grid::prefs_effect(Inkscape::Extension::Effect *module, Inkscape::UI::View::View * view, sigc::signal<void> * changeSignal, Inkscape::Extension::Implementation::ImplementationDocumentCache * /*docCache*/)
180 {
181 SPDocument * current_document = view->doc();
183 using Inkscape::Util::GSListConstIterator;
184 GSListConstIterator<SPItem *> selected = sp_desktop_selection((SPDesktop *)view)->itemList();
185 Inkscape::XML::Node * first_select = NULL;
186 if (selected != NULL)
187 first_select = SP_OBJECT_REPR(*selected);
189 return module->autogui(current_document, first_select, changeSignal);
190 }
192 #include "clear-n_.h"
194 void
195 Grid::init (void)
196 {
197 Inkscape::Extension::build_from_mem(
198 "<inkscape-extension xmlns=\"" INKSCAPE_EXTENSION_URI "\">\n"
199 "<name>" N_("Grid") "</name>\n"
200 "<id>org.inkscape.effect.grid</id>\n"
201 "<param name=\"lineWidth\" gui-text=\"" N_("Line Width:") "\" type=\"float\">1.0</param>\n"
202 "<param name=\"xspacing\" gui-text=\"" N_("Horizontal Spacing:") "\" type=\"float\" min=\"0.1\" max=\"1000\">10.0</param>\n"
203 "<param name=\"yspacing\" gui-text=\"" N_("Vertical Spacing:") "\" type=\"float\" min=\"0.1\" max=\"1000\">10.0</param>\n"
204 "<param name=\"xoffset\" gui-text=\"" N_("Horizontal Offset:") "\" type=\"float\" min=\"0.0\" max=\"1000\">0.0</param>\n"
205 "<param name=\"yoffset\" gui-text=\"" N_("Vertical Offset:") "\" type=\"float\" min=\"0.0\" max=\"1000\">0.0</param>\n"
206 "<effect>\n"
207 "<object-type>all</object-type>\n"
208 "<effects-menu>\n"
209 "<submenu name=\"" N_("Render") "\" />\n"
210 "</effects-menu>\n"
211 "<menu-tip>" N_("Draw a path which is a grid") "</menu-tip>\n"
212 "</effect>\n"
213 "</inkscape-extension>\n", new Grid());
214 return;
215 }
217 }; /* namespace Internal */
218 }; /* namespace Extension */
219 }; /* namespace Inkscape */
221 /*
222 Local Variables:
223 mode:c++
224 c-file-style:"stroustrup"
225 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
226 indent-tabs-mode:nil
227 fill-column:99
228 End:
229 */
230 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :