#define __SP_DROPPER_CONTEXT_C__ /* * Tool for picking colors from drawing * * Authors: * Lauris Kaplinski <lauris@kaplinski.com> * bulia byak <buliabyak@users.sf.net> * * Copyright (C) 1999-2005 Authors * * Released under GNU GPL, read the file 'COPYING' for more information */ #ifdef HAVE_CONFIG_H # include <config.h> #endif #include <glibmm/i18n.h> #include <glibmm/ustring.h> #include <glibmm/refptr.h> #include <gtkmm/clipboard.h> #include <gdk/gdkkeysyms.h> #include "macros.h" #include "display/canvas-bpath.h" #include "display/canvas-arena.h" #include "display/curve.h" #include "svg/svg-color.h" #include "color.h" #include "color-rgba.h" #include "desktop-style.h" #include "preferences.h" #include "sp-namedview.h" #include "desktop.h" #include "desktop-handles.h" #include "selection.h" #include "document.h" #include "pixmaps/cursor-dropper.xpm" #include "dropper-context.h" #include "message-context.h" //#include "libnr/nr-scale-translate-ops.h" static void sp_dropper_context_class_init(SPDropperContextClass *klass); static void sp_dropper_context_init(SPDropperContext *dc); static void sp_dropper_context_setup(SPEventContext *ec); static void sp_dropper_context_finish(SPEventContext *ec); static gint sp_dropper_context_root_handler(SPEventContext *ec, GdkEvent * event); static SPEventContextClass *parent_class; GType sp_dropper_context_get_type() { static GType type = 0; if (!type) { GTypeInfo info = { sizeof(SPDropperContextClass), NULL, NULL, (GClassInitFunc) sp_dropper_context_class_init, NULL, NULL, sizeof(SPDropperContext), 4, (GInstanceInitFunc) sp_dropper_context_init, NULL, /* value_table */ }; type = g_type_register_static(SP_TYPE_EVENT_CONTEXT, "SPDropperContext", &info, (GTypeFlags) 0); } return type; } static void sp_dropper_context_class_init(SPDropperContextClass *klass) { SPEventContextClass *ec_class = (SPEventContextClass *) klass; parent_class = (SPEventContextClass*)g_type_class_peek_parent(klass); ec_class->setup = sp_dropper_context_setup; ec_class->finish = sp_dropper_context_finish; ec_class->root_handler = sp_dropper_context_root_handler; } static void sp_dropper_context_init(SPDropperContext *dc) { SPEventContext *event_context = SP_EVENT_CONTEXT(dc); event_context->cursor_shape = cursor_dropper_xpm; event_context->hot_x = 7; event_context->hot_y = 7; } static void sp_dropper_context_setup(SPEventContext *ec) { SPDropperContext *dc = SP_DROPPER_CONTEXT(ec); if (((SPEventContextClass *) parent_class)->setup) { ((SPEventContextClass *) parent_class)->setup(ec); } /* TODO: have a look at sp_dyna_draw_context_setup where the same is done.. generalize? at least make it an arcto! */ SPCurve *c = new SPCurve(); const double C1 = 0.552; c->moveto(-1,0); c->curveto(-1, C1, -C1, 1, 0, 1 ); c->curveto(C1, 1, 1, C1, 1, 0 ); c->curveto(1, -C1, C1, -1, 0, -1 ); c->curveto(-C1, -1, -1, -C1, -1, 0 ); c->closepath(); dc->area = sp_canvas_bpath_new(sp_desktop_controls(ec->desktop), c); c->unref(); sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(dc->area), 0x00000000,(SPWindRule)0); sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(dc->area), 0x0000007f, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT); sp_canvas_item_hide(dc->area); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); if (prefs->getBool("/tools/dropper/selcue")) { ec->enableSelectionCue(); } if (prefs->getBool("/tools/dropper/gradientdrag")) { ec->enableGrDrag(); } } static void sp_dropper_context_finish(SPEventContext *ec) { SPDropperContext *dc = SP_DROPPER_CONTEXT(ec); ec->enableGrDrag(false); if (dc->grabbed) { sp_canvas_item_ungrab(dc->grabbed, GDK_CURRENT_TIME); dc->grabbed = NULL; } if (dc->area) { gtk_object_destroy(GTK_OBJECT(dc->area)); dc->area = NULL; } } /** * Returns the current dropper context icc-color. */ SPColor* sp_dropper_context_get_icc_color(SPEventContext */*ec*/) { //TODO: implement-me! return 0; // At least we will cause a clean crash, instead of random corruption. } /** * Returns the current dropper context color. */ guint32 sp_dropper_context_get_color(SPEventContext *ec) { SPDropperContext *dc = SP_DROPPER_CONTEXT(ec); Inkscape::Preferences *prefs = Inkscape::Preferences::get(); int pick = prefs->getInt("/tools/dropper/pick", SP_DROPPER_PICK_VISIBLE); bool setalpha = prefs->getBool("/tools/dropper/setalpha", true); return SP_RGBA32_F_COMPOSE(dc->R, dc->G, dc->B, (pick == SP_DROPPER_PICK_ACTUAL && setalpha) ? dc->alpha : 1.0); } static gint sp_dropper_context_root_handler(SPEventContext *event_context, GdkEvent *event) { SPDropperContext *dc = (SPDropperContext *) event_context; int ret = FALSE; SPDesktop *desktop = event_context->desktop; Inkscape::Preferences *prefs = Inkscape::Preferences::get(); int pick = prefs->getInt("/tools/dropper/pick", SP_DROPPER_PICK_VISIBLE); bool setalpha = prefs->getBool("/tools/dropper/setalpha", true); switch (event->type) { case GDK_BUTTON_PRESS: if (event->button.button == 1 && !event_context->space_panning) { dc->centre = Geom::Point(event->button.x, event->button.y); dc->dragging = TRUE; ret = TRUE; } sp_canvas_item_grab(SP_CANVAS_ITEM(desktop->acetate), GDK_KEY_PRESS_MASK | GDK_KEY_RELEASE_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK, NULL, event->button.time); dc->grabbed = SP_CANVAS_ITEM(desktop->acetate); break; case GDK_MOTION_NOTIFY: if (event->motion.state & GDK_BUTTON2_MASK) { // pass on middle-drag ret = FALSE; break; } else if (!event_context->space_panning) { // otherwise, constantly calculate color no matter is any button pressed or not double rw = 0.0; double W(0), R(0), G(0), B(0), A(0); if (dc->dragging) { // calculate average // radius rw = std::min(Geom::L2(Geom::Point(event->button.x, event->button.y) - dc->centre), 400.0); if (rw == 0) { // happens sometimes, little idea why... break; } Geom::Point const cd = desktop->w2d(dc->centre); Geom::Matrix const w2dt = desktop->w2d(); const double scale = rw * w2dt.descrim(); Geom::Matrix const sm( Geom::Scale(scale, scale) * Geom::Translate(cd) ); sp_canvas_item_affine_absolute(dc->area, sm); sp_canvas_item_show(dc->area); /* Get buffer */ const int x0 = (int) floor(dc->centre[Geom::X] - rw); const int y0 = (int) floor(dc->centre[Geom::Y] - rw); const int x1 = (int) ceil(dc->centre[Geom::X] + rw); const int y1 = (int) ceil(dc->centre[Geom::Y] + rw); if ((x1 > x0) && (y1 > y0)) { NRPixBlock pb; nr_pixblock_setup_fast(&pb, NR_PIXBLOCK_MODE_R8G8B8A8P, x0, y0, x1, y1, TRUE); /* fixme: (Lauris) */ sp_canvas_arena_render_pixblock(SP_CANVAS_ARENA(sp_desktop_drawing(desktop)), &pb); for (int y = y0; y < y1; y++) { const unsigned char *s = NR_PIXBLOCK_PX(&pb) + (y - y0) * pb.rs; for (int x = x0; x < x1; x++) { const double dx = x - dc->centre[Geom::X]; const double dy = y - dc->centre[Geom::Y]; const double w = exp(-((dx * dx) + (dy * dy)) / (rw * rw)); W += w; R += w * s[0]; G += w * s[1]; B += w * s[2]; A += w * s[3]; s += 4; } } nr_pixblock_release(&pb); R = (R + 0.001) / (255.0 * W); G = (G + 0.001) / (255.0 * W); B = (B + 0.001) / (255.0 * W); A = (A + 0.001) / (255.0 * W); R = CLAMP(R, 0.0, 1.0); G = CLAMP(G, 0.0, 1.0); B = CLAMP(B, 0.0, 1.0); A = CLAMP(A, 0.0, 1.0); } } else { // pick single pixel NRPixBlock pb; int x = (int) floor(event->button.x); int y = (int) floor(event->button.y); nr_pixblock_setup_fast(&pb, NR_PIXBLOCK_MODE_R8G8B8A8P, x, y, x+1, y+1, TRUE); sp_canvas_arena_render_pixblock(SP_CANVAS_ARENA(sp_desktop_drawing(desktop)), &pb); const unsigned char *s = NR_PIXBLOCK_PX(&pb); R = s[0] / 255.0; G = s[1] / 255.0; B = s[2] / 255.0; A = s[3] / 255.0; } if (pick == SP_DROPPER_PICK_VISIBLE) { // compose with page color guint32 bg = sp_desktop_namedview(desktop)->pagecolor; R = R + (SP_RGBA32_R_F(bg)) * (1 - A); G = G + (SP_RGBA32_G_F(bg)) * (1 - A); B = B + (SP_RGBA32_B_F(bg)) * (1 - A); A = 1.0; } else { // un-premultiply color channels if (A > 0) { R /= A; G /= A; B /= A; } } if (fabs(A) < 1e-4) { A = 0; // suppress exponentials, CSS does not allow that } // remember color dc->R = R; dc->G = G; dc->B = B; dc->alpha = A; // status message double alpha_to_set = setalpha? dc->alpha : 1.0; guint32 c32 = SP_RGBA32_F_COMPOSE(R, G, B, alpha_to_set); gchar c[64]; sp_svg_write_color(c, sizeof(c), c32); // alpha of color under cursor, to show in the statusbar // locale-sensitive printf is OK, since this goes to the UI, not into SVG gchar *alpha = g_strdup_printf(_(" alpha %.3g"), alpha_to_set); // where the color is picked, to show in the statusbar gchar *where = dc->dragging ? g_strdup_printf(_(", averaged with radius %d"), (int) rw) : g_strdup_printf(_(" under cursor")); // message, to show in the statusbar const gchar *message = dc->dragging ? _("<b>Release mouse</b> to set color.") : _("<b>Click</b> to set fill, <b>Shift+click</b> to set stroke; <b>drag</b> to average color in area; with <b>Alt</b> to pick inverse color; <b>Ctrl+C</b> to copy the color under mouse to clipboard"); event_context->defaultMessageContext()->setF( Inkscape::NORMAL_MESSAGE, "<b>%s%s</b>%s. %s", c, (pick == SP_DROPPER_PICK_VISIBLE)? "" : alpha, where, message ); g_free(where); g_free(alpha); ret = TRUE; } break; case GDK_BUTTON_RELEASE: if (event->button.button == 1 && !event_context->space_panning) { sp_canvas_item_hide(dc->area); dc->dragging = FALSE; if (dc->grabbed) { sp_canvas_item_ungrab(dc->grabbed, event->button.time); dc->grabbed = NULL; } double alpha_to_set = setalpha? dc->alpha : 1.0; // do the actual color setting sp_desktop_set_color(desktop, (event->button.state & GDK_MOD1_MASK)? ColorRGBA(1 - dc->R, 1 - dc->G, 1 - dc->B, alpha_to_set) : ColorRGBA(dc->R, dc->G, dc->B, alpha_to_set), false, !(event->button.state & GDK_SHIFT_MASK)); // REJON: set aux. toolbar input to hex color! if (!(sp_desktop_selection(desktop)->isEmpty())) { sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_DROPPER, _("Set picked color")); } ret = TRUE; } break; case GDK_KEY_PRESS: switch (get_group0_keyval(&event->key)) { case GDK_Up: case GDK_Down: case GDK_KP_Up: case GDK_KP_Down: // prevent the zoom field from activation if (!MOD__CTRL_ONLY) { ret = TRUE; } break; case GDK_Escape: sp_desktop_selection(desktop)->clear(); default: break; } break; default: break; } if (!ret) { if (((SPEventContextClass *) parent_class)->root_handler) { ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event); } } return ret; } /* 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 :