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#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 "libnr/n-art-bpath.h"
#include "macros.h"
#include "display/canvas-bpath.h"
#include "display/canvas-arena.h"
#include "display/curve.h"
#include "svg/svg.h"
#include "color.h"
#include "color-rgba.h"
#include "desktop-style.h"
#include "prefs-utils.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"
#define C1 0.552
static NArtBpath const spdc_circle[] = {
{ NR_MOVETO, 0, 0, 0, 0, -1, 0 },
{ NR_CURVETO, -1, C1, -C1, 1, 0, 1 },
{ NR_CURVETO, C1, 1, 1, C1, 1, 0 },
{ NR_CURVETO, 1, -C1, C1, -1, 0, -1 },
{ NR_CURVETO, -C1, -1, -1, -C1, -1, 0 },
{ NR_END, 0, 0, 0, 0, 0, 0 }
};
#undef C1
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);
}
SPCurve *c = sp_curve_new_from_static_bpath(spdc_circle);
dc->area = sp_canvas_bpath_new(SP_DT_CONTROLS(ec->desktop), c);
sp_curve_unref(c);
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);
if (prefs_get_int_attribute("tools.dropper", "selcue", 0) != 0) {
ec->enableSelectionCue();
}
if (prefs_get_int_attribute("tools.dropper", "gradientdrag", 0) != 0) {
ec->enableGrDrag();
}
}
static void sp_dropper_context_finish(SPEventContext *ec)
{
SPDropperContext *dc = SP_DROPPER_CONTEXT(ec);
ec->enableGrDrag(false);
if (dc->area) {
gtk_object_destroy(GTK_OBJECT(dc->area));
dc->area = NULL;
}
}
/**
* Copies the current context color to the clipboard.
*/
void sp_dropper_context_copy(SPEventContext *ec)
{
SPDropperContext *dc = SP_DROPPER_CONTEXT(ec);
guint32 const c32 = SP_RGBA32_F_COMPOSE(dc->R, dc->G, dc->B, dc->alpha);
int pick = prefs_get_int_attribute("tools.dropper", "pick",
SP_DROPPER_PICK_VISIBLE);
gchar c[64];
g_snprintf(c, 64, "%06x%02x", c32 >> 8,
pick == SP_DROPPER_PICK_ACTUAL? SP_COLOR_F_TO_U(dc->alpha) : 255);
Glib::ustring text;
text += c;
if (!text.empty())
{
Glib::RefPtr<Gtk::Clipboard> refClipboard =
Gtk::Clipboard::get();
refClipboard->set_text(text);
}
}
/**
* Makes a copy of the current desktop color to the clipboard.
*/
void sp_dropper_c32_color_copy(guint32 c32)
{
int const pick = prefs_get_int_attribute("tools.dropper", "pick",
SP_DROPPER_PICK_VISIBLE);
gchar c[64];
g_snprintf(c, 64, "%06x%02x", c32 >> 8,
pick == SP_DROPPER_PICK_ACTUAL? SP_RGBA32_A_U(c32) : 255);
Glib::ustring text;
text += c;
if (!text.empty()) {
Glib::RefPtr<Gtk::Clipboard> refClipboard = Gtk::Clipboard::get();
refClipboard->set_text(text);
}
}
/**
* Makes a copy of the current color as a hex value. This should always compute
* the current color without alpha, but the on-screen representation.
*/
void sp_dropper_c32_color_copy_hex(guint32 c32)
{
/*
int pick = prefs_get_int_attribute ("tools.dropper", "pick",
SP_DROPPER_PICK_VISIBLE);
if ( pick == SP_DROPPER_PICK_ACTUAL )
; // process c32 so that it computes against page
// else just can cut off that last 2 hex digits....
*/
gchar c[48];
g_snprintf(c, 48, "%06x", c32 >> 8);
Glib::ustring text;
text += c;
if (!text.empty()) {
Glib::RefPtr<Gtk::Clipboard> refClipboard = Gtk::Clipboard::get();
refClipboard->set_text(text);
}
}
static gint sp_dropper_context_root_handler(SPEventContext *ec, GdkEvent *event)
{
SPDropperContext *dc = (SPDropperContext *) ec;
int ret = FALSE;
int pick = prefs_get_int_attribute("tools.dropper", "pick", SP_DROPPER_PICK_VISIBLE);
switch (event->type) {
case GDK_BUTTON_PRESS:
if (event->button.button == 1) {
dc->centre = NR::Point(event->button.x, event->button.y);
dc->dragging = TRUE;
ret = TRUE;
}
break;
case GDK_MOTION_NOTIFY:
if (event->motion.state & GDK_BUTTON2_MASK) {
// pass on middle-drag
ret = FALSE;
break;
} else {
// 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(NR::L2(NR::Point(event->button.x, event->button.y) - dc->centre), 400.0);
if (rw == 0) { // happens sometimes, little idea why...
break;
}
NR::Point const cd = ec->desktop->w2d(dc->centre);
NR::Matrix const w2dt = ec->desktop->w2d();
const double scale = rw * NR_MATRIX_DF_EXPANSION(&w2dt);
NR::Matrix const sm( NR::scale(scale, scale) * NR::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[NR::X] - rw);
const int y0 = (int) floor(dc->centre[NR::Y] - rw);
const int x1 = (int) ceil(dc->centre[NR::X] + rw);
const int y1 = (int) ceil(dc->centre[NR::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_DT_DRAWING(ec->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[NR::X];
const double dy = y - dc->centre[NR::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_DT_DRAWING(ec->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_DT_NAMEDVIEW(ec->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
guint32 c32 = SP_RGBA32_F_COMPOSE(R, G, B, A);
gchar c[64];
sp_svg_write_color(c, 64, 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"), A);
// 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");
ec->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)
{
sp_canvas_item_hide(dc->area);
dc->dragging = FALSE;
// do the actual color setting
sp_desktop_set_color(ec->desktop,
(event->button.state & GDK_MOD1_MASK)?
ColorRGBA(1 - dc->R, 1 - dc->G, 1 - dc->B, dc->alpha) : ColorRGBA(dc->R, dc->G, dc->B, dc->alpha),
false, !(event->button.state & GDK_SHIFT_MASK));
// REJON: set aux. toolbar input to hex color!
if (!(SP_DT_SELECTION(ec->desktop)->isEmpty())) {
sp_document_done(SP_DT_DOCUMENT(ec->desktop));
}
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_DT_SELECTION(ec->desktop)->clear();
default:
break;
}
break;
default:
break;
}
if (!ret) {
if (((SPEventContextClass *) parent_class)->root_handler) {
ret = ((SPEventContextClass *) parent_class)->root_handler(ec, 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 :
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