Added copyright lines for files I've edited this year.
[synfig.git] / synfig-studio / trunk / src / gtkmm / workarea.cpp
index a1bd112..d7d61c0 100644 (file)
@@ -2,11 +2,12 @@
 /*!    \file workarea.cpp
 **     \brief Template Header
 **
-**     $Id: workarea.cpp,v 1.3 2005/01/16 19:55:57 darco Exp $
+**     $Id$
 **
 **     \legal
 **     Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
-**     Copyright 2006 Yue Shi Lai
+**     Copyright (c) 2006 Yue Shi Lai
+**     Copyright (c) 2007, 2008 Chris Moore
 **
 **     This package is free software; you can redistribute it and/or
 **     modify it under the terms of the GNU General Public License as
@@ -51,6 +52,7 @@
 #include <synfig/target_scanline.h>
 #include <synfig/target_tile.h>
 #include <synfig/surface.h>
+#include <synfig/valuenode_composite.h>
 #include <synfigapp/canvasinterface.h>
 #include "event_mouse.h"
 #include "event_layerclick.h"
@@ -70,6 +72,8 @@
 
 #include <synfig/mutex.h>
 
+#include "general.h"
+
 #endif
 
 /* === U S I N G =========================================================== */
@@ -167,8 +171,9 @@ public:
                set_clipping(true);
                if(low_res)
                {
-                       set_tile_w(workarea->tile_w/2);
-                       set_tile_h(workarea->tile_h/2);
+                       int div = workarea->get_low_res_pixel_size();
+                       set_tile_w(workarea->tile_w/div);
+                       set_tile_h(workarea->tile_h/div);
                }
                else
                {
@@ -188,8 +193,10 @@ public:
        {
                assert(workarea);
                newdesc->set_flags(RendDesc::PX_ASPECT|RendDesc::IM_SPAN);
-               if(low_res)
-                       newdesc->set_wh(w/2,h/2);
+               if(low_res) {
+                       int div = workarea->get_low_res_pixel_size();
+                       newdesc->set_wh(w/div,h/div);
+               }
                else
                        newdesc->set_wh(w,h);
 
@@ -261,7 +268,7 @@ public:
        }
 
 
-       virtual bool start_frame(synfig::ProgressCallback *cb)
+       virtual bool start_frame(synfig::ProgressCallback */*cb*/)
        {
                synfig::Mutex::Lock lock(mutex);
 
@@ -301,7 +308,10 @@ public:
                        int w(get_tile_w());
                        int h(get_tile_h());
                        int x(surface.get_w()*surface.get_h());
-                       //if(low_res) { w/=2,h/=2; }
+                       //if(low_res) {
+                       //      int div = workarea->get_low_res_pixel_size();
+                       //      w/=div,h/=div;
+                       //}
                        Color dark(0.6,0.6,0.6);
                        Color lite(0.8,0.8,0.8);
                        for(int i=0;i<x;i++)
@@ -341,9 +351,10 @@ public:
                if(low_res)
                {
                        // We need to scale up
+                       int div = workarea->get_low_res_pixel_size();
                        pixbuf=pixbuf->scale_simple(
-                               surface.get_w()*2,
-                               surface.get_h()*2,
+                               surface.get_w()*div,
+                               surface.get_h()*div,
                                Gdk::INTERP_NEAREST
                        );
                }
@@ -464,7 +475,10 @@ public:
                assert(workarea);
                newdesc->set_flags(RendDesc::PX_ASPECT|RendDesc::IM_SPAN);
                if(low_res)
-                       newdesc->set_wh(w/2,h/2);
+               {
+                       int div = workarea->get_low_res_pixel_size();
+                       newdesc->set_wh(w/div,h/div);
+               }
                else
                        newdesc->set_wh(w,h);
 
@@ -505,7 +519,7 @@ public:
        }
 
 
-       virtual bool start_frame(synfig::ProgressCallback *cb)
+       virtual bool start_frame(synfig::ProgressCallback */*cb*/)
        {
                return true;
        }
@@ -540,15 +554,19 @@ public:
                        int w(surface.get_w());
                        //int h(surface.get_h());
                        int x(surface.get_w()*surface.get_h());
-                       //if(low_res) { w/=2,h/=2; }
+                       //if(low_res) {
+                       //      int div = workarea->get_low_res_pixel_size();
+                       //      w/=div,h/=div;
+                       //}
                        Color dark(0.6,0.6,0.6);
                        Color lite(0.8,0.8,0.8);
                        int tw=workarea->tile_w;
                        int th=workarea->tile_h;
                        if(low_res)
                        {
-                               tw/=2;
-                               th/=2;
+                               int div = workarea->get_low_res_pixel_size();
+                               tw/=div;
+                               th/=div;
                        }
                        for(int i=0;i<x;i++)
                                dest=Color2PixelFormat(
@@ -579,9 +597,10 @@ public:
                if(low_res)
                {
                        // We need to scale up
+                       int div = workarea->get_low_res_pixel_size();
                        pixbuf=pixbuf->scale_simple(
-                               surface.get_w()*2,
-                               surface.get_h()*2,
+                               surface.get_w()*div,
+                               surface.get_h()*div,
                                Gdk::INTERP_NEAREST
                        );
                }
@@ -626,14 +645,16 @@ WorkArea::WorkArea(etl::loose_handle<synfigapp::CanvasInterface> canvas_interfac
        canvas(canvas_interface->get_canvas()),
        scrollx_adjustment(0,-4,4,0.01,0.1),
        scrolly_adjustment(0,-4,4,0.01,0.1),
-       w(128),
-       h(128),
+       w(TILE_SIZE),
+       h(TILE_SIZE),
        last_event_time(0),
        progresscallback(0),
        dragging(DRAG_NONE),
        show_grid(false),
-       tile_w(128),
-       tile_h(128)
+       tile_w(TILE_SIZE),
+       tile_h(TILE_SIZE),
+       timecode_width(0),
+       timecode_height(0)
 {
        show_guides=true;
        curr_input_device=0;
@@ -643,6 +664,7 @@ WorkArea::WorkArea(etl::loose_handle<synfigapp::CanvasInterface> canvas_interfac
        render_idle_func_id=0;
        zoom=prev_zoom=1.0;
        quality=10;
+       low_res_pixel_size=2;
        rendering=false;
        canceled_=false;
        low_resolution=true;
@@ -786,7 +808,7 @@ WorkArea::WorkArea(etl::loose_handle<synfigapp::CanvasInterface> canvas_interfac
                if(!data.empty())
                {
                        if(!load_sketch(data))
-                               load_sketch(dirname(canvas->get_file_name())+ETL_DIRECTORY_SEPERATOR+basename(data));
+                               load_sketch(dirname(canvas->get_file_name())+ETL_DIRECTORY_SEPARATOR+basename(data));
                }
        }
 
@@ -799,6 +821,24 @@ WorkArea::WorkArea(etl::loose_handle<synfigapp::CanvasInterface> canvas_interfac
 WorkArea::~WorkArea()
 {
 //     delete [] buffer;
+
+       // don't leave the render function queued if we are about to vanish;
+       // that causes crashes
+       if(render_idle_func_id)
+               render_idle_func_id=0;
+}
+
+bool
+WorkArea::get_updating()const
+{
+       return App::single_threaded && async_renderer && async_renderer->updating;
+}
+
+void
+WorkArea::stop_updating(bool cancel)
+{
+       async_renderer->stop();
+       if (cancel) canceled_=true;
 }
 
 void
@@ -868,6 +908,8 @@ WorkArea::load_meta_data()
 
                if(!tmp.empty())
                        gx=stratof(tmp);
+               else
+                       synfig::error("WorkArea::load_meta_data(): Unable to parse data for \"grid_size\", which was \"%s\"",data.c_str());
 
                if(iter==data.end())
                        tmp.clear();
@@ -876,11 +918,11 @@ WorkArea::load_meta_data()
 
                if(!tmp.empty())
                        gy=stratof(tmp);
+               else
+                       synfig::error("WorkArea::load_meta_data(): Unable to parse data for \"grid_size\", which was \"%s\"",data.c_str());
 
                set_grid_size(Vector(gx,gy));
        }
-       else
-               synfig::error("WorkArea::load_meta_data(): Unable to parse data for \"grid_size\", which was \"%s\"",data.c_str());
 
        data=canvas->get_meta_data("grid_show");
        if(data.size() && (data=="1" || data[0]=='t' || data[0]=='T'))
@@ -1039,7 +1081,7 @@ void
 WorkArea::set_focus_point(const synfig::Point &point)
 {
        // These next three lines try to ensure that we place the
-       // focus on a pixel boundry
+       // focus on a pixel boundary
        /*Point adjusted(point[0]/abs(get_pw()),point[1]/abs(get_ph()));
        adjusted[0]=(abs(adjusted[0]-floor(adjusted[0]))<0.5)?floor(adjusted[0])*abs(get_pw()):ceil(adjusted[0])*abs(get_ph());
        adjusted[1]=(abs(adjusted[1]-floor(adjusted[1]))<0.5)?floor(adjusted[1])*abs(get_ph()):ceil(adjusted[1])*abs(get_ph());
@@ -1157,8 +1199,6 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
        bool is_mouse(false);
        Gdk::ModifierType modifier(Gdk::ModifierType(0));
 
-       drawing_area->grab_focus();
-
        // Handle input stuff
        if(
                event->any.type==GDK_MOTION_NOTIFY ||
@@ -1178,9 +1218,10 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
                {
                        device=event->button.device;
                        modifier=Gdk::ModifierType(event->button.state);
+                       drawing_area->grab_focus();
                }
 
-               // Make sure we recognise the device
+               // Make sure we recognize the device
                if(curr_input_device)
                {
                        if(curr_input_device!=device)
@@ -1246,7 +1287,7 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
        // GDK mouse scrolling events
        else if(event->any.type==GDK_SCROLL)
        {
-               // GDK information needed to properly interprete mouse
+               // GDK information needed to properly interpret mouse
                // scrolling events are: scroll.state, scroll.x/scroll.y, and
                // scroll.direction. The value of scroll.direction will be
                // obtained later.
@@ -1287,26 +1328,16 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
 
                                if(duck)
                                {
-                                       clicked_duck=0;
+                                       // make a note of whether the duck we click on was selected or not
                                        if(duck_is_selected(duck))
-                                       {
                                                clicked_duck=duck;
-                                       }
                                        else
                                        {
-                                               if(modifier&GDK_SHIFT_MASK)
-                                               {
-                                                       select_duck(duck);
-                                               }
-                                               else if(modifier&GDK_CONTROL_MASK)
-                                               {
-                                                       select_duck(duck);
-                                               }
-                                               else
-                                               {
+                                               clicked_duck=0;
+                                               // if CTRL isn't pressed, clicking an unselected duck will unselect all other ducks
+                                               if(!(modifier&GDK_CONTROL_MASK))
                                                        clear_selected_ducks();
-                                                       select_duck(duck);
-                                               }
+                                               select_duck(duck);
                                        }
                                }
                        }
@@ -1320,6 +1351,37 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
                        {
                                //get_selected_duck()->signal_user_click(0)();
                                //if(clicked_duck)clicked_duck->signal_user_click(0)();
+
+                               // if the user is holding shift while clicking on a tangent duck, consider splitting the tangent
+                               if (event->motion.state&GDK_SHIFT_MASK && duck->get_type() == Duck::TYPE_TANGENT)
+                               {
+                                       synfigapp::ValueDesc value_desc = duck->get_value_desc();
+
+                                       // we have the tangent, but need the vertex - that's the parent
+                                       if (value_desc.parent_is_value_node()) {
+                                               ValueNode_Composite::Handle parent_value_node = value_desc.get_parent_value_node();
+
+                                               // if the tangent isn't split, then split it
+                                               if (!((*(parent_value_node->get_link("split")))(get_time()).get(bool())))
+                                               {
+                                                       get_canvas_view()->canvas_interface()->
+                                                               change_value(synfigapp::ValueDesc(parent_value_node,
+                                                                                                                                 parent_value_node->get_link_index_from_name("split")),
+                                                                                        true);
+                                                       // rebuild the ducks from scratch, so the tangents ducks aren't connected
+                                                       get_canvas_view()->rebuild_ducks();
+
+                                                       // reprocess the mouse click
+                                                       return on_drawing_area_event(event);
+                                               }
+                                       } else {
+                                               // I don't know how to access the vertex from the tangent duck when originally drawing the bline in the bline tool
+
+                                               // synfig::ValueNode::Handle vn = value_desc.get_value_node();
+                                               synfig::info("parent isn't value node?  shift-drag-tangent doesn't work in bline tool yet...");
+                                       }
+                               }
+
                                dragging=DRAG_DUCK;
                                drag_point=mouse_pos;
                                //drawing_area->queue_draw();
@@ -1402,19 +1464,15 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
                                if(get_selected_ducks().size()<=1)
                                        duck->signal_user_click(2)();
                                else
-                               {
                                        canvas_view->get_smach().process_event(EventMouse(EVENT_WORKAREA_MULTIPLE_DUCKS_CLICKED,BUTTON_RIGHT,mouse_pos,pressure,modifier));
-                               }
                                return true;
                        }
-                       else
-                       if(bezier)
+                       else if(bezier)
                        {
                                bezier->signal_user_click(2)(bezier_click_pos);
                                return true;
                        }
-                       else
-                       if(layer)
+                       else if (layer)
                        {
                                if(canvas_view->get_smach().process_event(EventLayerClick(layer,BUTTON_RIGHT,mouse_pos))==Smach::RESULT_OK)
                                        return false;
@@ -1452,7 +1510,7 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
 
                signal_cursor_moved_();
 
-               // Guide/Duck hilights on hover
+               // Guide/Duck highlights on hover
                if(dragging==DRAG_NONE)
                {
                        GuideList::iterator iter;
@@ -1503,11 +1561,13 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
 
                        drawing_area->queue_draw();
                }
+
                if(dragging==DRAG_BOX)
                {
                        curr_point=mouse_pos;
                        drawing_area->queue_draw();
                }
+
                if(dragging==DRAG_GUIDE)
                {
                        if(curr_guide_is_x)
@@ -1516,30 +1576,34 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
                                *curr_guide=mouse_pos[1];
                        drawing_area->queue_draw();
                }
+
                if(dragging!=DRAG_WINDOW)
                {       // Update those triangle things on the rulers
                        const synfig::Point point(mouse_pos);
                        hruler->property_position()=Distance(point[0],Distance::SYSTEM_UNITS).get(App::distance_system,get_canvas()->rend_desc());
                        vruler->property_position()=Distance(point[1],Distance::SYSTEM_UNITS).get(App::distance_system,get_canvas()->rend_desc());
                }
-               if(dragging==DRAG_WINDOW)
-               {
-                       set_focus_point(get_focus_point()+mouse_pos-drag_point);
-               }
-               else
-               if(event->motion.state&GDK_BUTTON1_MASK && canvas_view->get_smach().process_event(EventMouse(EVENT_WORKAREA_MOUSE_BUTTON_DRAG,BUTTON_LEFT,mouse_pos,pressure,modifier))==Smach::RESULT_ACCEPT)
+
+               if(dragging == DRAG_WINDOW)
+                       set_focus_point(get_focus_point() + mouse_pos-drag_point);
+               else if (event->motion.state & GDK_BUTTON1_MASK &&
+                               canvas_view->get_smach().process_event(EventMouse(EVENT_WORKAREA_MOUSE_BUTTON_DRAG, BUTTON_LEFT,
+                                                                                                                                 mouse_pos,pressure,modifier)) == Smach::RESULT_ACCEPT)
                        return true;
-               else
-               if(event->motion.state&GDK_BUTTON2_MASK && canvas_view->get_smach().process_event(EventMouse(EVENT_WORKAREA_MOUSE_BUTTON_DRAG,BUTTON_MIDDLE,mouse_pos,pressure,modifier))==Smach::RESULT_ACCEPT)
+               else if (event->motion.state & GDK_BUTTON2_MASK &&
+                                canvas_view->get_smach().process_event(EventMouse(EVENT_WORKAREA_MOUSE_BUTTON_DRAG, BUTTON_MIDDLE,
+                                                                                                                                  mouse_pos, pressure, modifier)) == Smach::RESULT_ACCEPT)
                        return true;
-               else
-               if(event->motion.state&GDK_BUTTON3_MASK && canvas_view->get_smach().process_event(EventMouse(EVENT_WORKAREA_MOUSE_BUTTON_DRAG,BUTTON_RIGHT,mouse_pos,pressure,modifier))==Smach::RESULT_ACCEPT)
+               else if (event->motion.state & GDK_BUTTON3_MASK &&
+                                canvas_view->get_smach().process_event(EventMouse(EVENT_WORKAREA_MOUSE_BUTTON_DRAG, BUTTON_RIGHT,
+                                                                                                                                  mouse_pos, pressure, modifier)) == Smach::RESULT_ACCEPT)
                        return true;
-               else
-               if(canvas_view->get_smach().process_event(EventMouse(EVENT_WORKAREA_MOUSE_MOTION,BUTTON_NONE,mouse_pos,pressure,modifier))==Smach::RESULT_ACCEPT)
+               else if(canvas_view->get_smach().process_event(EventMouse(EVENT_WORKAREA_MOUSE_MOTION, BUTTON_NONE,
+                                                                                                                                 mouse_pos, pressure,modifier)) == Smach::RESULT_ACCEPT)
                        return true;
 
                break;
+
        case GDK_BUTTON_RELEASE:
        {
                bool ret(false);
@@ -1565,37 +1629,20 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
                        get_canvas_view()->duck_refresh_flag=true;
                        if(!drag_did_anything)
                        {
-                               //etl::handle<Duck> duck=find_duck(mouse_pos,radius);
-
-                               if(modifier&GDK_SHIFT_MASK)
+                               // if we originally clicked on a selected duck ...
+                               if(clicked_duck)
                                {
-                                       //synfig::info("DUCK_DRAG_RELEASE: SHIFT-MASK ON!");
-                                       if(clicked_duck)
-                                       {
-                                               //synfig::info("DUCK_DRAG_RELEASE: CLICKED DUCK!");
-                                               unselect_duck(clicked_duck);
-                                       }
-                               }
-                               else if(modifier&GDK_CONTROL_MASK)
-                               {
-                                       //synfig::info("DUCK_DRAG_RELEASE: CONTROL-MASK ON!");
-                                       if(clicked_duck)
-                                       {
-                                               //synfig::info("DUCK_DRAG_RELEASE: CLICKED DUCK!");
+                                       // ... and CTRL is pressed, then just toggle the clicked duck
+                                       //     otherwise make the clicked duck the only selected duck
+                                       if(modifier&GDK_CONTROL_MASK)
                                                unselect_duck(clicked_duck);
-                                       }
-                               }
-                               else
-                               {
-                                       //synfig::info("DUCK_DRAG_RELEASE: NO MASK!");
-                                       if(clicked_duck)
+                                       else
                                        {
-                                               //synfig::info("DUCK_DRAG_RELEASE: CLICKED DUCK!");
                                                clear_selected_ducks();
                                                select_duck(clicked_duck);
                                        }
+                                       clicked_duck->signal_user_click(0)();
                                }
-                               if(clicked_duck)clicked_duck->signal_user_click(0)();
                        }
                        else
                        {
@@ -1623,9 +1670,18 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
                                if(canvas_view->get_smach().process_event(EventBox(drag_point,mouse_pos,MouseButton(event->button.button),modifier))==Smach::RESULT_ACCEPT)
                                        return true;
 
-                               if(!(modifier&GDK_CONTROL_MASK) && !(modifier&GDK_SHIFT_MASK))
+                               // when dragging a box around some ducks:
+                               // SHIFT selects; CTRL toggles; SHIFT+CTRL unselects; <none> clears all then selects
+                               if(modifier&GDK_SHIFT_MASK)
+                                       select_ducks_in_box(drag_point,mouse_pos);
+
+                               if(modifier&GDK_CONTROL_MASK)
+                                       toggle_select_ducks_in_box(drag_point,mouse_pos);
+                               else if(!(modifier&GDK_SHIFT_MASK))
+                               {
                                        clear_selected_ducks();
-                               select_ducks_in_box(drag_point,mouse_pos);
+                                       select_ducks_in_box(drag_point,mouse_pos);
+                               }
                                ret=true;
                        }
                        else
@@ -1689,11 +1745,13 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
                        switch(event->scroll.direction)
                        {
                                case GDK_SCROLL_UP:
+                               case GDK_SCROLL_RIGHT:
                                        get_scrollx_adjustment()->set_value(scroll_point[0]+(mouse_pos[0]-scroll_point[0])*(1.25-(1+drift)));
                                        get_scrolly_adjustment()->set_value(scroll_point[1]-(mouse_pos[1]+scroll_point[1])*(1.25-(1+drift)));
                                        zoom_in();
                                        break;
                                case GDK_SCROLL_DOWN:
+                               case GDK_SCROLL_LEFT:
                                        get_scrollx_adjustment()->set_value(scroll_point[0]+(mouse_pos[0]-scroll_point[0])*(1/1.25-(1+drift)));
                                        get_scrolly_adjustment()->set_value(scroll_point[1]-(mouse_pos[1]+scroll_point[1])*(1/1.25-(1+drift)));
                                        zoom_out();
@@ -1719,6 +1777,12 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
                                case GDK_SCROLL_DOWN:
                                        get_scrollx_adjustment()->set_value(get_scrollx_adjustment()->get_value()+scroll_pixel*pw);
                                        break;
+                               case GDK_SCROLL_LEFT:
+                                       get_scrolly_adjustment()->set_value(get_scrolly_adjustment()->get_value()+scroll_pixel*ph);
+                                       break;
+                               case GDK_SCROLL_RIGHT:
+                                       get_scrolly_adjustment()->set_value(get_scrolly_adjustment()->get_value()-scroll_pixel*ph);
+                                       break;
                                default:
                                        break;
                        }
@@ -1740,6 +1804,12 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
                                case GDK_SCROLL_DOWN:
                                        get_scrolly_adjustment()->set_value(get_scrolly_adjustment()->get_value()-scroll_pixel*ph);
                                        break;
+                               case GDK_SCROLL_LEFT:
+                                       get_scrollx_adjustment()->set_value(get_scrollx_adjustment()->get_value()-scroll_pixel*pw);
+                                       break;
+                               case GDK_SCROLL_RIGHT:
+                                       get_scrollx_adjustment()->set_value(get_scrollx_adjustment()->get_value()+scroll_pixel*pw);
+                                       break;
                                default:
                                        break;
                        }
@@ -1753,7 +1823,7 @@ WorkArea::on_drawing_area_event(GdkEvent *event)
 }
 
 bool
-WorkArea::on_hruler_event(GdkEvent *event)
+WorkArea::on_hruler_event(GdkEvent */*event*/)
 {
 /*
        switch(event->type)
@@ -1810,16 +1880,14 @@ WorkArea::on_hruler_event(GdkEvent *event)
 }
 
 bool
-WorkArea::on_vruler_event(GdkEvent *event)
+WorkArea::on_vruler_event(GdkEvent */*event*/)
 {
 /*
        switch(event->type)
     {
        case GDK_BUTTON_PRESS:
-               DEBUGPOINT();
                if(dragging==DRAG_NONE)
                {
-                       DEBUGPOINT();
                        dragging=DRAG_GUIDE;
                        curr_guide=get_guide_list_x().insert(get_guide_list_x().begin());
                        curr_guide_is_x=true;
@@ -1827,10 +1895,8 @@ WorkArea::on_vruler_event(GdkEvent *event)
                return true;
                break;
        case GDK_BUTTON_RELEASE:
-               DEBUGPOINT();
                if(dragging==DRAG_GUIDE && curr_guide_is_x==true)
                {
-                       DEBUGPOINT();
                        dragging=DRAG_NONE;
                        get_guide_list_x().erase(curr_guide);
                }
@@ -1855,6 +1921,9 @@ WorkArea::refresh_dimension_info()
        pw=canvaswidth/w;
        ph=canvasheight/h;
 
+       Duckmatic::set_flip_x(pw < 0);
+       Duckmatic::set_flip_y(ph > 0);
+
        scrollx_adjustment.set_page_increment(abs(get_grid_size()[0]));
        scrollx_adjustment.set_step_increment(abs(pw));
        scrollx_adjustment.set_lower(-abs(canvaswidth));
@@ -1904,7 +1973,7 @@ WorkArea::screen_to_comp_coords(synfig::Point pos)const
 }
 
 synfig::Point
-WorkArea::comp_to_screen_coords(synfig::Point pos)const
+WorkArea::comp_to_screen_coords(synfig::Point /*pos*/)const
 {
        synfig::warning("WorkArea::comp_to_screen_coords: Not yet implemented");
        return synfig::Point();
@@ -1927,7 +1996,8 @@ WorkArea::next_unrendered_tile(int refreshes)const
                x(focus_point[0]/pw+drawing_area->get_width()/2-w/2),
                y(focus_point[1]/ph+drawing_area->get_height()/2-h/2);
 
-       const int width_in_tiles(w/tile_w+(w%tile_w?1:0));
+       int div = low_res_pixel_size;
+       const int width_in_tiles(w/tile_w+((low_resolution?((w/div)%(tile_w/div)):(w%tile_w))?1:0));
        const int height_in_tiles(h/tile_h+(h%tile_h?1:0));
 
        int
@@ -2020,7 +2090,6 @@ WorkArea::refresh(GdkEventExpose*event)
                }
        }
 
-
        // Calculate the window coordinates of the top-left
        // corner of the canvas.
        //const synfig::Vector::value_type
@@ -2034,27 +2103,31 @@ WorkArea::refresh(GdkEventExpose*event)
 
        Glib::RefPtr<Gdk::GC> gc=Gdk::GC::create(drawing_area->get_window());
 
-
-
        // If we are in animate mode, draw a red border around the screen
        if(canvas_interface->get_mode()&synfigapp::MODE_ANIMATE)
        {
-               /*gc->set_rgb_fg_color(Gdk::Color("#FF0000"));
+// #define USE_FRAME_BACKGROUND_TO_SHOW_EDIT_MODE
+#ifdef USE_FRAME_BACKGROUND_TO_SHOW_EDIT_MODE
+               // This method of drawing the red border doesn't work on any
+               // Gtk theme which uses the crux-engine, hcengine, industrial,
+               // mist, or ubuntulooks engine, such as the default ubuntu
+               // 'Human' theme.
+               drawing_frame->modify_bg(Gtk::STATE_NORMAL,Gdk::Color("#FF0000"));
+#else
+               // So let's do it in a more primitive fashion.
+               gc->set_rgb_fg_color(Gdk::Color("#FF0000"));
                gc->set_line_attributes(1,Gdk::LINE_SOLID,Gdk::CAP_BUTT,Gdk::JOIN_MITER);
                drawing_area->get_window()->draw_rectangle(
                        gc,
                        false,  // Fill?
                        0,0,    // x,y
-                       drawing_area->get_width()-1,drawing_area->get_height()-1        //w,h
-               );
-               */
-               drawing_frame->modify_bg(Gtk::STATE_NORMAL,Gdk::Color("#FF0000"));
-               //get_window()->set_background(Gdk::Color("#FF0000"));
+                       drawing_area->get_width()-1,drawing_area->get_height()-1); // w,h
+#endif
        }
+#ifdef USE_FRAME_BACKGROUND_TO_SHOW_EDIT_MODE
        else
                drawing_frame->unset_bg(Gtk::STATE_NORMAL);
-
-
+#endif
 
        previous_focus=get_focus_point();
 
@@ -2090,7 +2163,17 @@ WorkArea::set_quality(int x)
        queue_render_preview();
 }
 
+void
+WorkArea::set_low_res_pixel_size(int x)
+{
+       if(x==low_res_pixel_size)
+               return;
+       low_res_pixel_size=x;
+       queue_render_preview();
+}
 
+namespace studio
+{
 class WorkAreaProgress : public synfig::ProgressCallback
 {
        WorkArea *work_area;
@@ -2128,10 +2211,18 @@ public:
                return cb->amount_complete(current,total);
        }
 };
+}
 
 bool
 studio::WorkArea::async_update_preview()
 {
+       if (get_updating())
+       {
+               stop_updating();
+               queue_render_preview();
+               return false;
+       }
+
        async_renderer=0;
 
        queued=false;
@@ -2167,6 +2258,11 @@ studio::WorkArea::async_update_preview()
        int w=(int)(desc.get_w()*zoom);
        int h=(int)(desc.get_h()*zoom);
 
+       // ensure that the size we draw is at least one pixel in each dimension
+       int min_size = low_resolution ? low_res_pixel_size : 1;
+       if (w < min_size) w = min_size;
+       if (h < min_size) h = min_size;
+
        // Setup the description parameters
        desc.set_antialias(1);
        desc.set_time(cur_time);
@@ -2176,8 +2272,12 @@ studio::WorkArea::async_update_preview()
        // Create the render target
        handle<Target> target;
 
-       if(w*h>(low_resolution?480*270:480*270/2))
+       // if we have lots of pixels to render and the tile renderer isn't disabled, use it
+       int div;
+       div = low_resolution ? low_res_pixel_size : 1;
+       if (w*h > 240*div*135*div && !getenv("SYNFIG_DISABLE_TILE_RENDER"))
        {
+               // do a tile render
                handle<WorkAreaTarget> trgt(new class WorkAreaTarget(this,w,h));
 
                trgt->set_rend_desc(&desc);
@@ -2186,6 +2286,7 @@ studio::WorkArea::async_update_preview()
        }
        else
        {
+               // do a scanline render
                handle<WorkAreaTarget_Full> trgt(new class WorkAreaTarget_Full(this,w,h));
 
                trgt->set_rend_desc(&desc);
@@ -2210,7 +2311,7 @@ studio::WorkArea::async_update_preview()
        synfig::ProgressCallback *cb=get_canvas_view()->get_ui_interface().get();
 
        rendering=true;
-       cb->task("Rendering...");
+       cb->task(_("Rendering..."));
        rendering=true;
 
        return true;
@@ -2226,18 +2327,18 @@ studio::WorkArea::async_update_finished()
        if(!async_renderer)
                return;
 
-       // If we completed successfuly, then
+       // If we completed successfully, then
        // we aren't dirty anymore
        if(async_renderer->has_success())
        {
                dirty=false;
                //queued=false;
-               cb->task("Idle");
+               cb->task(_("Idle"));
        }
        else
        {
                dirty=true;
-               cb->task("Render Failed");
+               cb->task(_("Render Failed"));
        }
        //get_canvas_view()->reset_cancel_status();
        done_rendering();
@@ -2287,7 +2388,6 @@ again:
        dirty=false;
        get_canvas_view()->reset_cancel_status();
 
-       bool ret=false;
        RendDesc desc=get_canvas()->rend_desc();
        //newdesc->set_flags(RendDesc::PX_ASPECT|RendDesc::IM_SPAN);
 
@@ -2312,9 +2412,9 @@ again:
        target->set_avoid_time_sync(true);
 
        if(cb)
-               cb->task(strprintf("Rendering canvas %s...",get_canvas()->get_name().c_str()));
+               cb->task(strprintf(_("Rendering canvas %s..."),get_canvas()->get_name().c_str()));
 
-       target->render(cb);
+       bool ret = target->render(cb);
 
        if(!ret && !get_canvas_view()->get_cancel_status() && dirty)
        {
@@ -2328,9 +2428,9 @@ again:
        if(cb)
        {
                if(ret)
-                       cb->task("Idle");
+                       cb->task(_("Idle"));
                else
-                       cb->task("Render Failed");
+                       cb->task(_("Render Failed"));
                cb->amount_complete(0,1);
        }
 
@@ -2338,7 +2438,7 @@ again:
        // it is being displayed correctly
        drawing_area->queue_draw();
 
-       // If we completed successfuly, then
+       // If we completed successfully, then
        // we aren't dirty anymore
        if(ret)
        {
@@ -2353,7 +2453,7 @@ again:
 }
 
 void
-studio::WorkArea::async_render_preview(Time time)
+studio::WorkArea::async_render_preview(synfig::Time time)
 {
        cur_time=time;
        //tile_book.clear();
@@ -2374,7 +2474,7 @@ WorkArea::async_render_preview()
 }
 
 bool
-studio::WorkArea::sync_render_preview(Time time)
+studio::WorkArea::sync_render_preview(synfig::Time time)
 {
        cur_time=time;
        //tile_book.clear();
@@ -2420,13 +2520,41 @@ WorkArea::queue_scroll()
 
        drawing_area->get_window()->scroll(-dx,-dy);
 
-       /*drawing_area->queue_draw_area(
-               0,
-               0,
-               128,
-               64
-       );
-       */
+       if (timecode_width && timecode_height)
+       {
+               drawing_area->queue_draw_area(4,       4,    4+timecode_width,    4+timecode_height);
+               drawing_area->queue_draw_area(4-dx, 4-dy, 4-dx+timecode_width, 4-dy+timecode_height);
+       }
+
+#ifndef USE_FRAME_BACKGROUND_TO_SHOW_EDIT_MODE
+       if(canvas_interface->get_mode()&synfigapp::MODE_ANIMATE)
+       {
+               int maxx = drawing_area->get_width()-1;
+               int maxy = drawing_area->get_height()-1;
+
+               if (dx > 0)
+               {
+                       drawing_area->queue_draw_area(      0, 0,       1, maxy);
+                       drawing_area->queue_draw_area(maxx-dx, 0, maxx-dx, maxy);
+               }
+               else if (dx < 0) 
+               {
+                       drawing_area->queue_draw_area(   maxx, 0,    maxx, maxy);
+                       drawing_area->queue_draw_area(    -dx, 0,     -dx, maxy);
+               }
+               if (dy > 0)
+               {
+                       drawing_area->queue_draw_area(0,       0, maxx,       1);
+                       drawing_area->queue_draw_area(0, maxy-dy, maxx, maxy-dy);
+               }
+               else if (dy < 0) 
+               {
+                       drawing_area->queue_draw_area(0,    maxy, maxx,    maxy);
+                       drawing_area->queue_draw_area(0,     -dy, maxx,     -dy);
+               }
+       }
+#endif // USE_FRAME_BACKGROUND_TO_SHOW_EDIT_MODE
+
        last_focus_point=focus_point;
 }
 
@@ -2464,9 +2592,11 @@ studio::WorkArea::zoom_norm()
 gboolean
 studio::WorkArea::__render_preview(gpointer data)
 {
-
        WorkArea *work_area(static_cast<WorkArea*>(data));
 
+       // there's no point anyone trying to cancel the timer now - it's gone off already
+       work_area->render_idle_func_id = 0;
+
        work_area->queued=false;
        work_area->async_render_preview(work_area->get_canvas_view()->get_time());
 
@@ -2506,7 +2636,12 @@ studio::WorkArea::queue_render_preview()
        {
                //synfig::info("queue_render_preview(): (re)queuing...");
                //render_idle_func_id=g_idle_add_full(G_PRIORITY_DEFAULT,__render_preview,this,NULL);
-               render_idle_func_id=g_timeout_add_full(G_PRIORITY_DEFAULT,queue_time,__render_preview,this,NULL);
+               render_idle_func_id=g_timeout_add_full(
+                       G_PRIORITY_DEFAULT,     // priority - 
+                       queue_time,                     // interval - the time between calls to the function, in milliseconds (1/1000ths of a second)
+                       __render_preview,       // function - function to call
+                       this,                           // data     - data to pass to function
+                       NULL);                          // notify   - function to call when the idle is removed, or NULL
                queued=true;
        }
 /*     else if(rendering)
@@ -2549,12 +2684,12 @@ studio::WorkArea::set_cursor(Gdk::CursorType x)
        drawing_area->get_window()->set_cursor(Gdk::Cursor(x));
 }
 
-#include "iconcontroler.h"
+#include "iconcontroller.h"
 
 void
 studio::WorkArea::refresh_cursor()
 {
-//     set_cursor(IconControler::get_tool_cursor(canvas_view->get_smach().get_state_name(),drawing_area->get_window()));
+//     set_cursor(IconController::get_tool_cursor(canvas_view->get_smach().get_state_name(),drawing_area->get_window()));
 }
 
 void