Code

add helpers for creating cairo_t for a canvas buf
[inkscape.git] / src / dropper-context.cpp
index e37f1660bca922ea18e0c7e59818c83a7ccd3932..81814fc01cd1e154e3219768da72c1562699aade 100644 (file)
@@ -27,7 +27,7 @@
 #include "display/canvas-bpath.h"
 #include "display/canvas-arena.h"
 #include "display/curve.h"
-#include "svg/svg.h"
+#include "svg/svg-color.h"
 #include "color.h"
 #include "color-rgba.h"
 #include "desktop-style.h"
@@ -89,7 +89,7 @@ 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;
@@ -111,17 +111,17 @@ static void sp_dropper_context_setup(SPEventContext *ec)
         ((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);
+    SPCurve *c = SPCurve::new_from_foreign_bpath(spdc_circle);
+    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);
-        
+
     if (prefs_get_int_attribute("tools.dropper", "selcue", 0) != 0) {
         ec->enableSelectionCue();
     }
-    
+
     if (prefs_get_int_attribute("tools.dropper", "gradientdrag", 0) != 0) {
         ec->enableGrDrag();
     }
@@ -130,9 +130,9 @@ static void sp_dropper_context_setup(SPEventContext *ec)
 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;
@@ -141,90 +141,33 @@ static void sp_dropper_context_finish(SPEventContext *ec)
 
 
 /**
- * Copies the current context color to the clipboard.
+ * Returns the current dropper context color.
  */
-void sp_dropper_context_copy(SPEventContext *ec)
+guint32 sp_dropper_context_get_color(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....
+    int setalpha = prefs_get_int_attribute("tools.dropper", "setalpha", 1);
     
-    */
-
-    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);
-    }
+    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 *ec, GdkEvent *event)
+static gint sp_dropper_context_root_handler(SPEventContext *event_context, GdkEvent *event)
 {
-    SPDropperContext *dc = (SPDropperContext *) ec;
+    SPDropperContext *dc = (SPDropperContext *) event_context;
     int ret = FALSE;
+    SPDesktop *desktop = event_context->desktop;
 
     int pick = prefs_get_int_attribute("tools.dropper", "pick", SP_DROPPER_PICK_VISIBLE);
+    int setalpha = prefs_get_int_attribute("tools.dropper", "setalpha", 1);
 
     switch (event->type) {
        case GDK_BUTTON_PRESS:
-            if (event->button.button == 1) {
+            if (event->button.button == 1 && !event_context->space_panning) {
                 dc->centre = NR::Point(event->button.x, event->button.y);
                 dc->dragging = TRUE;
                 ret = TRUE;
@@ -235,40 +178,40 @@ static gint sp_dropper_context_root_handler(SPEventContext *ec, GdkEvent *event)
                 // pass on middle-drag
                 ret = FALSE;
                 break;
-            } else {
+            } 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) { 
+
+                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::Point const cd = desktop->w2d(dc->centre);
+                    NR::Matrix const w2dt = desktop->w2d();
+                    const double scale = rw * NR::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);
+                        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++) {
@@ -284,7 +227,7 @@ static gint sp_dropper_context_root_handler(SPEventContext *ec, GdkEvent *event)
                             }
                         }
                         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);
@@ -302,18 +245,18 @@ static gint sp_dropper_context_root_handler(SPEventContext *ec, GdkEvent *event)
                     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);
+                    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_DT_NAMEDVIEW(ec->desktop)->pagecolor;
+                    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);
@@ -326,7 +269,7 @@ static gint sp_dropper_context_root_handler(SPEventContext *ec, GdkEvent *event)
                         B /= A;
                     }
                 }
-                
+
                 if (fabs(A) < 1e-4) {
                     A = 0; // suppress exponentials, CSS does not allow that
                 }
@@ -336,50 +279,54 @@ static gint sp_dropper_context_root_handler(SPEventContext *ec, GdkEvent *event)
                 dc->G = G;
                 dc->B = B;
                 dc->alpha = A;
-                
+
                 // status message
-                guint32 c32 = SP_RGBA32_F_COMPOSE(R, G, B, A);
-                
+                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, 64, c32);
+                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"), A);
+                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");
-                ec->defaultMessageContext()->setF(
+                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
+            if (event->button.button == 1 && !event_context->space_panning)
             {
                 sp_canvas_item_hide(dc->area);
                 dc->dragging = FALSE;
-                
+
+                double alpha_to_set = setalpha? dc->alpha : 1.0;
+
                 // do the actual color setting
-                sp_desktop_set_color(ec->desktop, 
+                sp_desktop_set_color(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),
+                                     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_DT_SELECTION(ec->desktop)->isEmpty())) {
-                    sp_document_done(SP_DT_DOCUMENT(ec->desktop));
+
+
+                if (!(sp_desktop_selection(desktop)->isEmpty())) {
+                    sp_document_done(sp_desktop_document(desktop), SP_VERB_CONTEXT_DROPPER, 
+                                     _("Set picked color"));
                 }
 
                 ret = TRUE;
@@ -387,17 +334,17 @@ static gint sp_dropper_context_root_handler(SPEventContext *ec, GdkEvent *event)
             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: 
+               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();
+                    sp_desktop_selection(desktop)->clear();
                default:
                     break;
             }
@@ -405,13 +352,13 @@ static gint sp_dropper_context_root_handler(SPEventContext *ec, GdkEvent *event)
        default:
             break;
     }
-    
+
     if (!ret) {
         if (((SPEventContextClass *) parent_class)->root_handler) {
-            ret = ((SPEventContextClass *) parent_class)->root_handler(ec, event);
+            ret = ((SPEventContextClass *) parent_class)->root_handler(event_context, event);
         }
     }
-    
+
     return ret;
 }