Code

redo NR::Maybe to be less clever
[inkscape.git] / src / pen-context.cpp
index 95593f25b2e8ca6f3eee4f8780d30818467ecfc7..0f8a4204a928b19217d7138eb31138e82466feb2 100644 (file)
@@ -1,5 +1,5 @@
-/** \file 
- * Pen event context implementation. 
+/** \file
+ * Pen event context implementation.
  */
 
 /*
@@ -63,6 +63,8 @@ static gint pen_handle_2button_press(SPPenContext *const pc);
 static gint pen_handle_key_press(SPPenContext *const pc, GdkEvent *event);
 static void spdc_reset_colors(SPPenContext *pc);
 
+static void pen_disable_events(SPPenContext *const pc);
+static void pen_enable_events(SPPenContext *const pc);
 
 static NR::Point pen_drag_origin_w(0, 0);
 static bool pen_within_tolerance = false;
@@ -126,7 +128,7 @@ sp_pen_context_init(SPPenContext *pc)
     event_context->cursor_shape = cursor_pen_xpm;
     event_context->hot_x = 4;
     event_context->hot_y = 4;
-    
+
     pc->npoints = 0;
     pc->mode = SP_PEN_CONTEXT_MODE_CLICK;
     pc->state = SP_PEN_CONTEXT_POINT;
@@ -135,6 +137,8 @@ sp_pen_context_init(SPPenContext *pc)
     pc->c1 = NULL;
     pc->cl0 = NULL;
     pc->cl1 = NULL;
+    
+    pc->events_disabled = 0;
 }
 
 /**
@@ -182,13 +186,13 @@ sp_pen_context_setup(SPEventContext *ec)
     }
 
     /* Pen indicators */
-    pc->c0 = sp_canvas_item_new(SP_DT_CONTROLS(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
+    pc->c0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
                                 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
-    pc->c1 = sp_canvas_item_new(SP_DT_CONTROLS(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
+    pc->c1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRL, "shape", SP_CTRL_SHAPE_CIRCLE,
                                 "size", 4.0, "filled", 0, "fill_color", 0xff00007f, "stroked", 1, "stroke_color", 0x0000ff7f, NULL);
-    pc->cl0 = sp_canvas_item_new(SP_DT_CONTROLS(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
+    pc->cl0 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
     sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl0), 0x0000007f);
-    pc->cl1 = sp_canvas_item_new(SP_DT_CONTROLS(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
+    pc->cl1 = sp_canvas_item_new(sp_desktop_controls(SP_EVENT_CONTEXT_DESKTOP(ec)), SP_TYPE_CTRLLINE, NULL);
     sp_ctrlline_set_rgba32(SP_CTRLLINE(pc->cl1), 0x0000007f);
 
     sp_canvas_item_hide(pc->c0);
@@ -205,13 +209,32 @@ sp_pen_context_setup(SPEventContext *ec)
     }
 }
 
+static void
+pen_cancel (SPPenContext *const pc) 
+{
+    pc->state = SP_PEN_CONTEXT_STOP;
+    spdc_reset_colors(pc);
+    sp_canvas_item_hide(pc->c0);
+    sp_canvas_item_hide(pc->c1);
+    sp_canvas_item_hide(pc->cl0);
+    sp_canvas_item_hide(pc->cl1);
+    pc->_message_context->clear();
+    pc->_message_context->flash(Inkscape::NORMAL_MESSAGE, _("Drawing cancelled"));
+
+    sp_canvas_end_forced_full_redraws(pc->desktop->canvas);
+}
+
 /**
  * Finalization callback.
  */
 static void
 sp_pen_context_finish(SPEventContext *ec)
 {
-    spdc_pen_finish(SP_PEN_CONTEXT(ec), FALSE);
+    SPPenContext *pc = SP_PEN_CONTEXT(ec);
+
+    if (pc->npoints != 0) {
+        pen_cancel (pc);
+    }
 
     if (((SPEventContextClass *) pen_parent_class)->finish) {
         ((SPEventContextClass *) pen_parent_class)->finish(ec);
@@ -235,7 +258,7 @@ sp_pen_context_set(SPEventContext *ec, gchar const *key, gchar const *val)
     }
 }
 
-/** 
+/**
  * Snaps new node relative to the previous node.
  */
 static void
@@ -248,7 +271,7 @@ spdc_endpoint_snap(SPPenContext const *const pc, NR::Point &p, guint const state
     spdc_endpoint_snap_free(pc, p, state);
 }
 
-/** 
+/**
  * Snaps new node's handle relative to the new node.
  */
 static void
@@ -312,6 +335,11 @@ sp_pen_context_root_handler(SPEventContext *ec, GdkEvent *event)
  */
 static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const &bevent)
 {
+    if (pc->events_disabled) {
+        // skip event processing if events are disabled
+        return FALSE;
+    }
+
     gint ret = FALSE;
     if (bevent.button == 1) {
 
@@ -321,7 +349,7 @@ static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const
         if (Inkscape::have_viable_layer(desktop, dc->_message_context) == false) {
             return TRUE;
         }
-        
+
         NR::Point const event_w(bevent.x, bevent.y);
         pen_drag_origin_w = event_w;
         pen_within_tolerance = true;
@@ -352,12 +380,12 @@ static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const
                         /* This is allowed, if we just cancelled curve */
                     case SP_PEN_CONTEXT_POINT:
                         if (pc->npoints == 0) {
-                            
+
                             /* Set start anchor */
                             pc->sa = anchor;
                             NR::Point p;
                             if (anchor) {
-                                
+
                                 /* Adjust point to anchor if needed */
                                 p = anchor->dp;
                                 desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Continuing selected path"));
@@ -367,9 +395,9 @@ static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const
                                 // This is the first click of a new curve; deselect item so that
                                 // this curve is not combined with it (unless it is drawn from its
                                 // anchor, which is handled by the sibling branch above)
-                                Inkscape::Selection * const selection = SP_DT_SELECTION(desktop);
+                                Inkscape::Selection * const selection = sp_desktop_selection(desktop);
                                 if (!(bevent.state & GDK_SHIFT_MASK)) {
-                                    
+
                                     selection->clear();
                                     desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Creating new path"));
 
@@ -385,12 +413,12 @@ static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const
                             }
                             spdc_pen_set_initial_point(pc, p);
                         } else {
-                            
+
                             /* Set end anchor */
                             pc->ea = anchor;
                             NR::Point p;
                             if (anchor) {
-                                
+
                                 p = anchor->dp;
                                 // we hit an anchor, will finish the curve (either with or without closing)
                                 // in release handler
@@ -399,18 +427,18 @@ static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const
                                 if (pc->green_anchor && pc->green_anchor->active) {
                                     // we clicked on the current curve start, so close it even if
                                     // we drag a handle away from it
-                                    dc->green_closed = TRUE; 
+                                    dc->green_closed = TRUE;
                                 }
                                 ret = TRUE;
                                 break;
-                                
+
                             } else {
-                                
+
                                 p = event_dt;
                                 spdc_endpoint_snap(pc, p, bevent.state); /* Snap node only if not hitting anchor. */
                                 spdc_pen_set_subsequent_point(pc, p, true);
                             }
-                            
+
                         }
                         pc->state = SP_PEN_CONTEXT_CONTROL;
                         ret = TRUE;
@@ -434,7 +462,7 @@ static gint pen_handle_button_press(SPPenContext *const pc, GdkEventButton const
             ret = TRUE;
         }
     }
-    
+
     return ret;
 }
 
@@ -450,6 +478,11 @@ pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent)
         // allow middle-button scrolling
         return FALSE;
     }
+    
+    if (pc->events_disabled) {
+        // skip motion events if pen events are disabled
+        return FALSE;
+    }
 
     NR::Point const event_w(mevent.x,
                             mevent.y);
@@ -566,6 +599,11 @@ pen_handle_motion_notify(SPPenContext *const pc, GdkEventMotion const &mevent)
 static gint
 pen_handle_button_release(SPPenContext *const pc, GdkEventButton const &revent)
 {
+    if (pc->events_disabled) {
+        // skip event processing if events are disabled
+        return FALSE;
+    }
+
     gint ret = FALSE;
     if ( revent.button == 1 ) {
 
@@ -682,6 +720,57 @@ pen_handle_2button_press(SPPenContext *const pc)
     return ret;
 }
 
+void
+pen_redraw_all (SPPenContext *const pc)
+{
+    // green
+    if (pc->green_bpaths) {
+        // remove old piecewise green canvasitems
+        while (pc->green_bpaths) {
+            gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
+            pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
+        }
+        // one canvas bpath for all of green_curve
+        SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), pc->green_curve);
+        sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
+        sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cshape), 0, SP_WIND_RULE_NONZERO);
+
+        pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
+    }
+
+    if (pc->green_anchor)
+        SP_CTRL(pc->green_anchor->ctrl)->moveto(pc->green_anchor->dp);
+
+    sp_curve_reset(pc->red_curve);
+    sp_curve_moveto(pc->red_curve, pc->p[0]);
+    sp_curve_curveto(pc->red_curve, pc->p[1], pc->p[2], pc->p[3]);
+    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
+
+    // handles
+    if (pc->p[0] != pc->p[1]) {
+        SP_CTRL(pc->c1)->moveto(pc->p[1]);
+        sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
+        sp_canvas_item_show (pc->c1);
+        sp_canvas_item_show (pc->cl1);
+    } else {
+        sp_canvas_item_hide (pc->c1);
+        sp_canvas_item_hide (pc->cl1);
+    }
+
+    NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
+    if (bpath) {
+        if (bpath->code == NR_CURVETO && NR::Point(bpath->x2, bpath->y2) != pc->p[0]) {
+            SP_CTRL(pc->c0)->moveto(NR::Point(bpath->x2, bpath->y2));
+            sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), NR::Point(bpath->x2, bpath->y2), pc->p[0]);
+            sp_canvas_item_show (pc->c0);
+            sp_canvas_item_show (pc->cl0);
+        } else {
+            sp_canvas_item_hide (pc->c0);
+            sp_canvas_item_hide (pc->cl0);
+        }
+    }
+}
+
 void
 pen_lastpoint_move (SPPenContext *const pc, gdouble x, gdouble y)
 {
@@ -697,44 +786,17 @@ pen_lastpoint_move (SPPenContext *const pc, gdouble x, gdouble y)
         }
         bpath->x3 += x;
         bpath->y3 += y;
-        if (pc->green_bpaths && pc->green_bpaths->data) {
-            // remove old piecewise green canvasitems
-            while (pc->green_bpaths) {
-                gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
-                pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
-            }
-            // one canvas bpath for all of green_curve
-            SPCanvasItem *cshape = sp_canvas_bpath_new(SP_DT_SKETCH(pc->desktop), pc->green_curve);
-            sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
-            sp_canvas_bpath_set_fill(SP_CANVAS_BPATH(cshape), 0, SP_WIND_RULE_NONZERO);
-
-            pc->green_bpaths = g_slist_prepend(pc->green_bpaths, cshape);
-        }
     } else {
         // start anchor too
         if (pc->green_anchor) {
             pc->green_anchor->dp += NR::Point(x, y);
-            SP_CTRL(pc->green_anchor->ctrl)->moveto(pc->green_anchor->dp);
         }
     }
 
     // red
     pc->p[0] += NR::Point(x, y);
     pc->p[1] += NR::Point(x, y);
-    sp_curve_reset(pc->red_curve);
-    sp_curve_moveto(pc->red_curve, pc->p[0]);
-    sp_curve_curveto(pc->red_curve, pc->p[1], pc->p[2], pc->p[3]);
-    sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
-
-    // handles
-    if (pc->p[0] != pc->p[1]) {
-        SP_CTRL(pc->c1)->moveto(pc->p[1]);
-        sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl1), pc->p[0], pc->p[1]);
-    }
-    if (bpath && bpath->code == NR_CURVETO && NR::Point(bpath->x2, bpath->y2) != pc->p[0]) {
-        SP_CTRL(pc->c0)->moveto(NR::Point(bpath->x2, bpath->y2));
-        sp_ctrlline_set_coords(SP_CTRLLINE(pc->cl0), NR::Point(bpath->x2, bpath->y2), pc->p[0]);
-    }
+    pen_redraw_all(pc);
 }
 
 void
@@ -743,6 +805,35 @@ pen_lastpoint_move_screen (SPPenContext *const pc, gdouble x, gdouble y)
     pen_lastpoint_move (pc, x / pc->desktop->current_zoom(), y / pc->desktop->current_zoom());
 }
 
+void
+pen_lastpoint_tocurve (SPPenContext *const pc)
+{
+    if (pc->npoints != 5)
+        return;
+
+    // red
+    NArtBpath *const bpath = sp_curve_last_bpath(pc->green_curve);
+    if (bpath && bpath->code == NR_CURVETO) {
+        pc->p[1] = pc->p[0] + (NR::Point(bpath->x3, bpath->y3) - NR::Point(bpath->x2, bpath->y2));
+    } else {
+        pc->p[1] = pc->p[0] + (pc->p[3] - pc->p[0])*(1/3);
+    }
+
+    pen_redraw_all(pc);
+}
+
+void
+pen_lastpoint_toline (SPPenContext *const pc)
+{
+    if (pc->npoints != 5)
+        return;
+
+    pc->p[1] = pc->p[0];
+
+    pen_redraw_all(pc);
+}
+
+
 static gint
 pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
 {
@@ -812,6 +903,21 @@ pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
             }
             break;
 
+        case GDK_U:
+        case GDK_u:
+            if (MOD__SHIFT_ONLY) {
+                pen_lastpoint_tocurve(pc);
+                ret = TRUE;
+            }
+            break;
+        case GDK_L:
+        case GDK_l:
+            if (MOD__SHIFT_ONLY) {
+                pen_lastpoint_toline(pc);
+                ret = TRUE;
+            }
+            break;
+
         case GDK_Return:
         case GDK_KP_Enter:
             if (pc->npoints != 0) {
@@ -822,12 +928,7 @@ pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
         case GDK_Escape:
             if (pc->npoints != 0) {
                 // if drawing, cancel, otherwise pass it up for deselecting
-                pc->state = SP_PEN_CONTEXT_STOP;
-                spdc_reset_colors(pc);
-                sp_canvas_item_hide(pc->c0);
-                sp_canvas_item_hide(pc->c1);
-                sp_canvas_item_hide(pc->cl0);
-                sp_canvas_item_hide(pc->cl1);
+                pen_cancel (pc);
                 ret = TRUE;
             }
             break;
@@ -835,12 +936,7 @@ pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
         case GDK_Z:
             if (MOD__CTRL_ONLY && pc->npoints != 0) {
                 // if drawing, cancel, otherwise pass it up for undo
-                pc->state = SP_PEN_CONTEXT_STOP;
-                spdc_reset_colors(pc);
-                sp_canvas_item_hide(pc->c0);
-                sp_canvas_item_hide(pc->c1);
-                sp_canvas_item_hide(pc->cl0);
-                sp_canvas_item_hide(pc->cl1);
+                pen_cancel (pc);
                 ret = TRUE;
             }
             break;
@@ -848,13 +944,7 @@ pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
         case GDK_Delete:
         case GDK_KP_Delete:
             if (sp_curve_is_empty(pc->green_curve)) {
-                /* Same as cancel */
-                pc->state = SP_PEN_CONTEXT_STOP;
-                spdc_reset_colors(pc);
-                sp_canvas_item_hide(pc->c0);
-                sp_canvas_item_hide(pc->c1);
-                sp_canvas_item_hide(pc->cl0);
-                sp_canvas_item_hide(pc->cl1);
+                pen_cancel (pc);
                 ret = TRUE;
             } else {
                 /* Reset red curve */
@@ -864,7 +954,7 @@ pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
                     if (pc->green_bpaths->data)
                         gtk_object_destroy(GTK_OBJECT(pc->green_bpaths->data));
                     pc->green_bpaths = g_slist_remove(pc->green_bpaths, pc->green_bpaths->data);
-                }    
+                }
                 /* Get last segment */
                 NArtBpath const *const p = SP_CURVE_BPATH(pc->green_curve);
                 gint const e = SP_CURVE_LENGTH(pc->green_curve);
@@ -873,7 +963,11 @@ pen_handle_key_press(SPPenContext *const pc, GdkEvent *event)
                     break;
                 }
                 pc->p[0] = p[e - 2].c(3);
-                pc->p[1] = p[e - 1].c(1);
+                if (p[e - 1].code == NR_CURVETO) {
+                    pc->p[1] = p[e - 1].c(1);
+                } else {
+                    pc->p[1] = pc->p[0];
+                }
                 NR::Point const pt(( pc->npoints < 4
                                      ? p[e - 1].c(3)
                                      : pc->p[3] ));
@@ -928,6 +1022,8 @@ spdc_pen_set_initial_point(SPPenContext *const pc, NR::Point const p)
     pc->p[1] = p;
     pc->npoints = 2;
     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), NULL);
+
+    sp_canvas_force_full_redraw_after_interruptions(pc->desktop->canvas, 5);
 }
 
 static void
@@ -952,6 +1048,7 @@ spdc_pen_set_subsequent_point(SPPenContext *const pc, NR::Point const p, bool st
         sp_curve_lineto(pc->red_curve, p);
         is_curve = false;
     }
+
     sp_canvas_bpath_set_bpath(SP_CANVAS_BPATH(pc->red_bpath), pc->red_curve);
 
     if (statusbar) {
@@ -1031,8 +1128,8 @@ spdc_pen_finish_segment(SPPenContext *const pc, NR::Point const p, guint const s
     if (!sp_curve_empty(pc->red_curve)) {
         sp_curve_append_continuous(pc->green_curve, pc->red_curve, 0.0625);
         SPCurve *curve = sp_curve_copy(pc->red_curve);
-        /// \todo fixme: 
-        SPCanvasItem *cshape = sp_canvas_bpath_new(SP_DT_SKETCH(pc->desktop), curve);
+        /// \todo fixme:
+        SPCanvasItem *cshape = sp_canvas_bpath_new(sp_desktop_sketch(pc->desktop), curve);
         sp_curve_unref(curve);
         sp_canvas_bpath_set_stroke(SP_CANVAS_BPATH(cshape), pc->green_color, 1.0, SP_STROKE_LINEJOIN_MITER, SP_STROKE_LINECAP_BUTT);
 
@@ -1049,9 +1146,11 @@ spdc_pen_finish_segment(SPPenContext *const pc, NR::Point const p, guint const s
 static void
 spdc_pen_finish(SPPenContext *const pc, gboolean const closed)
 {
+    pen_disable_events(pc);
+    
     SPDesktop *const desktop = pc->desktop;
     pc->_message_context->clear();
-    desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Finishing pen"));
+    desktop->messageStack()->flash(Inkscape::NORMAL_MESSAGE, _("Drawing finished"));
 
     sp_curve_reset(pc->red_curve);
     spdc_concat_colors_and_flush(pc, closed);
@@ -1069,8 +1168,24 @@ spdc_pen_finish(SPPenContext *const pc, gboolean const closed)
     if (pc->green_anchor) {
         pc->green_anchor = sp_draw_anchor_destroy(pc->green_anchor);
     }
+
+
+    sp_canvas_end_forced_full_redraws(pc->desktop->canvas);
+
+    pen_enable_events(pc);
+}
+
+static void
+pen_disable_events(SPPenContext *const pc) {
+  pc->events_disabled++;
 }
 
+static void
+pen_enable_events(SPPenContext *const pc) {
+  g_return_if_fail(pc->events_disabled != 0);
+  
+  pc->events_disabled--;
+}
 
 /*
   Local Variables: