moving trunk for module inkscape

(bzr r1)

1 files changed, 428 insertions, 0 deletions

diff --git a/src/dropper-context.cpp b/src/dropper-context.cpp
new file mode 100644
index 000000000..e37f1660b
--- /dev/null
+++ b/src/dropper-context.cpp
@@ -0,0 +1,428 @@
+#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 :