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Sourcecode: ardour version File versions

canvas-simplerect.c

#include <stdio.h>
#include <math.h>
#include <libgnomecanvas/libgnomecanvas.h>

#include "canvas-simplerect.h"
#include "rgb_macros.h"
#include "gettext.h"
#define _(Text)  dgettext (PACKAGE,Text)

enum {
      PROP_0,
      PROP_X1,
      PROP_Y1,
      PROP_X2,
      PROP_Y2,
      PROP_OUTLINE_PIXELS,
      PROP_OUTLINE_WHAT,
      PROP_FILL,
      PROP_FILL_COLOR_RGBA,
      PROP_OUTLINE_COLOR_RGBA,
      PROP_DRAW
      
};

static void   gnome_canvas_simplerect_class_init    (GnomeCanvasSimpleRectClass *class);

static void   gnome_canvas_simplerect_init          (GnomeCanvasSimpleRect      *simplerect);

static void   gnome_canvas_simplerect_destroy       (GtkObject                  *object);

static void   gnome_canvas_simplerect_set_property  (GObject        *object,
                                         guint            prop_id,
                                         const GValue   *value,
                                         GParamSpec     *pspec);

static void   gnome_canvas_simplerect_get_property  (GObject        *object,
                                         guint           prop_id,
                                         GValue         *value,
                                         GParamSpec     *pspec);

static void   gnome_canvas_simplerect_update        (GnomeCanvasItem *item,
                                         double          *affine,
                                         ArtSVP          *clip_path,
                                         int              flags);

static void   gnome_canvas_simplerect_bounds        (GnomeCanvasItem *item,
                                         double          *x1,
                                         double          *y1,
                                         double          *x2,
                                         double          *y2);

static double gnome_canvas_simplerect_point         (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item);

static void   gnome_canvas_simplerect_render        (GnomeCanvasItem *item, GnomeCanvasBuf *buf);

static void   gnome_canvas_simplerect_draw          (GnomeCanvasItem *item, GdkDrawable *drawable, int x, int y, int w, int h);

static GnomeCanvasItemClass *parent_class;


GType
gnome_canvas_simplerect_get_type (void)
{
      static GType simplerect_type;

      if (!simplerect_type) {
            static const GTypeInfo object_info = {
                  sizeof (GnomeCanvasSimpleRectClass),
                  (GBaseInitFunc) NULL,
                  (GBaseFinalizeFunc) NULL,
                  (GClassInitFunc) gnome_canvas_simplerect_class_init,
                  (GClassFinalizeFunc) NULL,
                  NULL,             /* class_data */
                  sizeof (GnomeCanvasSimpleRect),
                  0,                /* n_preallocs */
                  (GInstanceInitFunc) gnome_canvas_simplerect_init,
                  NULL              /* value_table */
            };

            simplerect_type = g_type_register_static (GNOME_TYPE_CANVAS_ITEM, "GnomeCanvasSimpleRect",
                                            &object_info, 0);
      }

      return simplerect_type;
}

static void
gnome_canvas_simplerect_class_init (GnomeCanvasSimpleRectClass *class)
{
        GObjectClass *gobject_class;
      GtkObjectClass *object_class;
      GnomeCanvasItemClass *item_class;

      gobject_class = (GObjectClass *) class;
      object_class = (GtkObjectClass *) class;
      item_class = (GnomeCanvasItemClass *) class;
      
      parent_class = g_type_class_peek_parent (class);

      gobject_class->set_property = gnome_canvas_simplerect_set_property;
      gobject_class->get_property = gnome_canvas_simplerect_get_property;
      
      g_object_class_install_property (gobject_class,
                               PROP_X1,
                               g_param_spec_double ("x1",
                                                _("x1"),
                                                _("x coordinate of upper left corner of rect"),
                                                -G_MAXDOUBLE,
                                                G_MAXDOUBLE,
                                                0.0,
                                                G_PARAM_READWRITE));  
      
      g_object_class_install_property (gobject_class,
                               PROP_Y1,
                               g_param_spec_double ("y1",
                                                _("y1"),
                                                _("y coordinate of upper left corner of rect "),
                                                -G_MAXDOUBLE,
                                                G_MAXDOUBLE,
                                                0.0,
                                                G_PARAM_READWRITE));  
      

      g_object_class_install_property (gobject_class,
                               PROP_X2,
                               g_param_spec_double ("x2",
                                                _("x2"),
                                                _("x coordinate of lower right corner of rect"),
                                                -G_MAXDOUBLE,
                                                G_MAXDOUBLE,
                                                0.0,
                                                G_PARAM_READWRITE));  
      
      g_object_class_install_property (gobject_class,
                               PROP_Y2,
                               g_param_spec_double ("y2",
                                                _("y2"),
                                                _("y coordinate of lower right corner of rect "),
                                                -G_MAXDOUBLE,
                                                G_MAXDOUBLE,
                                                0.0,
                                                G_PARAM_READWRITE));  
      

      g_object_class_install_property (gobject_class,
                               PROP_OUTLINE_PIXELS,
                               g_param_spec_uint ("outline_pixels",
                                                _("outline pixels"),
                                                _("width in pixels of outline"),
                                                0,
                                                G_MAXUINT,
                                                0,
                                                G_PARAM_READWRITE));  
      

      g_object_class_install_property (gobject_class,
                               PROP_OUTLINE_WHAT,
                               g_param_spec_uint ("outline_what",
                                                _("outline what"),
                                                _("which boundaries to outline (mask)"),
                                                0,
                                                G_MAXUINT,
                                                0,
                                                G_PARAM_READWRITE));  
      


      g_object_class_install_property (gobject_class,
                               PROP_FILL,
                               g_param_spec_boolean ("fill",
                                                 _("fill"),
                                                 _("fill rectangle"),
                                                 TRUE,
                                                 G_PARAM_READWRITE));  
      
      g_object_class_install_property (gobject_class,
                               PROP_DRAW,
                               g_param_spec_boolean ("draw",
                                                 _("draw"),
                                                 _("draw rectangle"),
                                                 TRUE,
                                                 G_PARAM_READWRITE));  
      

      g_object_class_install_property (gobject_class,
                               PROP_OUTLINE_COLOR_RGBA,
                               g_param_spec_uint ("outline_color_rgba",
                                              _("outline color rgba"),
                                              _("color of outline"),
                                              0,
                                              G_MAXUINT,
                                              0,
                                              G_PARAM_READWRITE));  
      

      g_object_class_install_property (gobject_class,
                               PROP_FILL_COLOR_RGBA,
                               g_param_spec_uint ("fill_color_rgba",
                                              _("fill color rgba"),
                                              _("color of fill"),
                                              0,
                                              G_MAXUINT,
                                              0,
                                              G_PARAM_READWRITE));  

      object_class->destroy = gnome_canvas_simplerect_destroy;

      item_class->update = gnome_canvas_simplerect_update;
      item_class->draw = gnome_canvas_simplerect_draw;
      item_class->bounds = gnome_canvas_simplerect_bounds;
      item_class->point = gnome_canvas_simplerect_point;
      item_class->render = gnome_canvas_simplerect_render;

}

static void
gnome_canvas_simplerect_init (GnomeCanvasSimpleRect *simplerect)
{
      simplerect->x1 = 0.0;
      simplerect->y1 = 0.0;
      simplerect->x2 = 0.0;
      simplerect->y2 = 0.0;
      simplerect->fill = TRUE;
      simplerect->draw = TRUE;
      simplerect->full_draw_on_update = TRUE;
      simplerect->fill_color = 0;
      simplerect->outline_color = 0;
      simplerect->outline_pixels = 1;
      simplerect->outline_what = 0xf;
}

static void
gnome_canvas_simplerect_destroy (GtkObject *object)
{
      GnomeCanvasSimpleRect *rect;
      
      g_return_if_fail (object != NULL);
      g_return_if_fail (GNOME_IS_CANVAS_SIMPLERECT (object));

      rect = GNOME_CANVAS_SIMPLERECT (object);

      /* remember, destroy can be run multiple times! */

      if (GTK_OBJECT_CLASS (parent_class)->destroy)
            (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}

static void
gnome_canvas_simplerect_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
{
      GnomeCanvasSimpleRect *simplerect = GNOME_CANVAS_SIMPLERECT (item);

      *x1 = simplerect->x1;
      *y1 = simplerect->y1;
      *x2 = simplerect->x2 + 1;
      *y2 = simplerect->y2 + 1;

}


static void 
gnome_canvas_simplerect_reset_bounds (GnomeCanvasItem *item)
{
      GnomeCanvasSimpleRect* simplerect;
      double x1, x2, y1, y2;
      double old_x1, old_x2, old_y1, old_y2;
      ArtDRect unionrect, old, new;

      old_x1 = item->x1;
      old_y1 = item->y1;
      old_x2 = item->x2;
      old_y2 = item->y2;
      
      gnome_canvas_simplerect_bounds (item, &x1, &y1, &x2, &y2);
      gnome_canvas_item_i2w (item, &x1, &y1);
      gnome_canvas_item_i2w (item, &x2, &y2);

      item->x1 = x1;
      item->y1 = y1;
      item->x2 = x2;
      item->y2 = y2;

      /* now compute bounding box in canvas units */

      simplerect = GNOME_CANVAS_SIMPLERECT (item);

      gnome_canvas_w2c (GNOME_CANVAS(item->canvas), x1, y1, &simplerect->bbox_ulx, &simplerect->bbox_uly);
      gnome_canvas_w2c (GNOME_CANVAS(item->canvas), x2, y2, &simplerect->bbox_lrx, &simplerect->bbox_lry);

      /* now queue redraws for changed areas */

      if (item->x1 == old_x1 && item->x2 == old_x2) {

            /* no change in x-axis position */

            if (item->y1 == old_y1) {
                  /* top didn't change, so just draw bottom */

                  double start_y = MIN (item->y2, old_y2);
                  double end_y = MAX (item->y2, old_y2);

                  gnome_canvas_request_redraw (item->canvas, item->x1, start_y - 0.5, item->x2, end_y + 1.5);
                  return;

            } else if (item->y2 == old_y2) {

                  /* bottom didn't change, just draw top */

                  double start_y = MIN (item->y1, old_y1);
                  double end_y = MAX (item->y1, old_y1);

                  gnome_canvas_request_redraw (item->canvas, item->x1, start_y - 0.5, item->x2, end_y + 1.5);
                  return;

            }

      } else if (item->y1 == old_y1 && item->y2 == old_y2) {

            /* no change in y-axis position */

            if (item->x1 == old_x1) {
                  /* start didn't change, so just draw at the end */

                  double start_x = MIN (item->x2, old_x2);
                  double end_x = MAX (item->x2, old_x2);

                  gnome_canvas_request_redraw (item->canvas, start_x - 0.5, item->y1, end_x + 1.5, item->y2);
                  return;

            } else if (item->x2 == old_x2) {

                  /* end didn't change, so just draw at the start */
                  
                  double start_x = MIN (item->x1, old_x1);
                  double end_x = MAX (item->x1, old_x1);

                  gnome_canvas_request_redraw (item->canvas, start_x - 0.5, item->y1, end_x + 1.5, item->y2 + 0.5);
                  return;

            }
      } 

      new.x0 = x1;
      new.y0 = y1;
      new.x1 = x2;
      new.y1 = y2;

      old.x0 = old_x1;
      old.y0 = old_y1;
      old.x1 = old_x2;
      old.y1 = old_y2;

      art_drect_union (&unionrect, &old, &new);
      gnome_canvas_request_redraw (item->canvas, 
                             unionrect.x0 - 0.5,
                             unionrect.y0 - 0.5,
                             unionrect.x1 + 1.5,
                             unionrect.y1 + 1.5);
}

/* 
 * CANVAS CALLBACKS 
 */

static void
gnome_canvas_simplerect_set_property (GObject      *object,
                              guint         prop_id,
                              const GValue *value,
                              GParamSpec   *pspec)

{
      GnomeCanvasSimpleRect *simplerect;
      int update = FALSE;
      int bounds_changed = FALSE;
      g_return_if_fail (object != NULL);
      g_return_if_fail (GNOME_IS_CANVAS_SIMPLERECT (object));

      simplerect = GNOME_CANVAS_SIMPLERECT (object);

      switch (prop_id) {
      case PROP_X1:
              if (simplerect->x1 != g_value_get_double (value)) {
                    simplerect->x1 = g_value_get_double (value);
                  bounds_changed = TRUE;
            }
            break;

      case PROP_Y1:
              if (simplerect->y1 != g_value_get_double (value)) {
                    simplerect->y1 = g_value_get_double (value);
                  bounds_changed = TRUE;
            }
            break;

      case PROP_X2:
              if (simplerect->x2 != g_value_get_double (value)) {
                    simplerect->x2 = g_value_get_double (value);
                  bounds_changed = TRUE;
            }
            break;

      case PROP_Y2:
              if (simplerect->y2 != g_value_get_double (value)) {
                    simplerect->y2 = g_value_get_double (value);
                  bounds_changed = TRUE;
            }
            break;

      case PROP_DRAW:
              if (simplerect->draw != g_value_get_boolean (value)) {
                    simplerect->draw = g_value_get_boolean (value);
                  update = TRUE;
            }
            break;


      case PROP_FILL:
              if (simplerect->fill != g_value_get_boolean (value)) {
                    simplerect->fill = g_value_get_boolean (value);
                  update = TRUE;
            }
            break;

      case PROP_FILL_COLOR_RGBA:
            if (simplerect->fill_color != g_value_get_uint(value)) {
                  simplerect->fill_color = g_value_get_uint(value);
                  update = TRUE;
            }
            break;

      case PROP_OUTLINE_COLOR_RGBA:
            if (simplerect->outline_color != g_value_get_uint(value)) {
                  simplerect->outline_color = g_value_get_uint(value);
                  update = TRUE;
            }
            break;

      case PROP_OUTLINE_PIXELS:
            if (simplerect->outline_pixels != g_value_get_uint(value)) {
                  simplerect->outline_pixels = g_value_get_uint(value);
                  update = TRUE;
            }
            break;

      case PROP_OUTLINE_WHAT:
            if (simplerect->outline_what != g_value_get_uint(value)) {
                  simplerect->outline_what = g_value_get_uint(value);
                  update = TRUE;
            }
            break;

      default:
            break;
      }

      simplerect->full_draw_on_update = update;

      if (update || bounds_changed) {
            gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(object));
      }
}

static void
gnome_canvas_simplerect_get_property (GObject      *object,
                              guint         prop_id,
                              GValue       *value,
                              GParamSpec   *pspec)
{
      GnomeCanvasSimpleRect *rect = GNOME_CANVAS_SIMPLERECT (object);
      
      g_return_if_fail (object != NULL);
      g_return_if_fail (GNOME_IS_CANVAS_SIMPLERECT (object));

      switch (prop_id) {
      case PROP_X1:
            g_value_set_double (value, rect->x1);
            break;
      case PROP_X2:
            g_value_set_double (value, rect->x2);
            break;
      case PROP_Y1:
            g_value_set_double (value, rect->y1);
            break;
      case PROP_Y2:
            g_value_set_double (value, rect->y2);
            break;
      case PROP_OUTLINE_WHAT:
            g_value_set_uint (value, rect->outline_what);
            break;
      case PROP_FILL:
            g_value_set_boolean (value, rect->fill);
            break;
      case PROP_OUTLINE_PIXELS:
            g_value_set_uint (value, rect->outline_pixels);
            break;
      case PROP_FILL_COLOR_RGBA:
            g_value_set_uint (value, rect->fill_color);
            break;
      case PROP_OUTLINE_COLOR_RGBA:
            g_value_set_uint (value, rect->outline_color);
            break;
      case PROP_DRAW:
            g_value_set_boolean (value, rect->draw);
            break;
            
      default:
            G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
            break;
      }
}


static void
gnome_canvas_simplerect_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
{
      GnomeCanvasSimpleRect *simplerect;
      unsigned char foo;

      simplerect = GNOME_CANVAS_SIMPLERECT (item);

      if (parent_class->update)
            (* parent_class->update) (item, affine, clip_path, flags);

      gnome_canvas_simplerect_reset_bounds (item);

      if (simplerect->full_draw_on_update) {
            gnome_canvas_request_redraw (item->canvas, 
                                 simplerect->bbox_ulx,
                                 simplerect->bbox_uly,
                                 simplerect->bbox_lrx+0.5,
                                 simplerect->bbox_lry+0.5);
            simplerect->full_draw_on_update = FALSE;
      }

      UINT_TO_RGBA (simplerect->fill_color, &simplerect->fill_r, &simplerect->fill_g, &simplerect->fill_b, &simplerect->fill_a);
      UINT_TO_RGBA (simplerect->outline_color, &simplerect->outline_r, &simplerect->outline_g, &simplerect->outline_b, &foo);
}

// this can be useful for debugging/understanding how the canvas redraws
// stuff.

#undef HARLEQUIN_DEBUGGING

#undef SIMPLERECT_FAST_RENDERER
#ifdef SIMPLERECT_FAST_RENDERER

static void
gnome_canvas_simplerect_render (GnomeCanvasItem *item,
                        GnomeCanvasBuf *buf)
{
      GnomeCanvasSimpleRect *simplerect;
      int end, begin;
      int ey, sy;
      unsigned int i;
      ArtIRect intersection;
      ArtIRect self;

      simplerect = GNOME_CANVAS_SIMPLERECT (item);

      if (parent_class->render) {
            (*parent_class->render) (item, buf);
      }
      
      if (buf->is_bg) {

#ifdef HARLEQUIN_DEBUGGING
            gint randr, randg, randb;
            randr = random() % 255;
            randg = random() % 255;
            randb = random() % 255;
            PAINT_BOX(buf, randr, randg, randb, 255, buf->rect.x0, buf->rect.y0, buf->rect.x1, buf->rect.y1);
#endif
            gnome_canvas_buf_ensure_buf (buf);
            buf->is_bg = FALSE;
      }

      if (!simplerect->draw) {
            return;
      }
      
      self.x0 = simplerect->bbox_ulx;
      self.y0 = simplerect->bbox_uly;
      self.x1 = simplerect->bbox_lrx;
      self.y1 = simplerect->bbox_lry;

      art_irect_intersect (&intersection, &self, &buf->rect);

      begin = MAX(simplerect->bbox_ulx, buf->rect.x0);
      end = MIN((simplerect->bbox_lrx-1), buf->rect.x1);

      sy = simplerect->bbox_uly;
      ey = simplerect->bbox_lry-1;

      if (simplerect->fill) {
            
            // this can be useful for debugging/understanding how the canvas redraws
            // stuff.

#ifdef HARLEQUIN_DEBUGGING
            gint randr, randg, randb;
            randr = random() % 255;
            randg = random() % 255;
            randb = random() % 255;
            PAINT_BOX(buf, randr, randg, randb, simplerect->fill_a, begin, sy, end, ey);
#else       
            PAINT_BOX (buf, simplerect->fill_r, simplerect->fill_g, simplerect->fill_b, simplerect->fill_a, 
                     intersection.x0, intersection.y0,
                     intersection.x1, intersection.y1);
#endif
            
      }

      for (i = 0; i < simplerect->outline_pixels; ++i) {

            if (simplerect->outline_what & 0x1) {
                  if (begin == simplerect->bbox_ulx) {
                        PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin + i, sy, ey);
                  }
            }

            if (simplerect->outline_what & 0x2) {
                  if (end == (simplerect->bbox_lrx - 1)) {
                        PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, end - i, sy, ey + 1);
                  }
            }

            if (simplerect->outline_what & 0x4) {
                  PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end, sy+i);
            }
      
            if (simplerect->outline_what & 0x8) {
                  PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end + 1, ey-i);
            }
      }
}

#else /* SIMPLERECT_FAST_RENDERER */

static void
gnome_canvas_simplerect_render (GnomeCanvasItem *item,
                        GnomeCanvasBuf *buf)
{
      GnomeCanvasSimpleRect *simplerect;
      int end, begin;
      int ey, sy;
      unsigned int i;

      simplerect = GNOME_CANVAS_SIMPLERECT (item);

      if (parent_class->render) {
            (*parent_class->render) (item, buf);
      }

      if (buf->is_bg) {

#ifdef HARLEQUIN_DEBUGGING
            gint randr, randg, randb;
            randr = random() % 255;
            randg = random() % 255;
            randb = random() % 255;
            PAINT_BOX(buf, randr, randg, randb, 255, buf->rect.x0, buf->rect.y0, buf->rect.x1, buf->rect.y1);
#endif
            gnome_canvas_buf_ensure_buf (buf);
            buf->is_bg = FALSE;
      }

      if (!simplerect->draw) {
            return;
      }

      begin = MAX(simplerect->bbox_ulx,buf->rect.x0);
      end = MIN((simplerect->bbox_lrx-1),buf->rect.x1);

      sy = simplerect->bbox_uly;
      ey = simplerect->bbox_lry-1;

      if (simplerect->fill) {
            
#ifdef HARLEQUIN_DEBUGGING
            gint randr, randg, randb;
            randr = random() % 255;
            randg = random() % 255;
            randb = random() % 255;
            PAINT_BOX(buf, randr, randg, randb, simplerect->fill_a, begin, sy, end, ey);
#else       
            PAINT_BOX(buf, simplerect->fill_r, simplerect->fill_g, simplerect->fill_b, simplerect->fill_a, begin, sy, end, ey);
#endif
      }

      for (i = 0; i < simplerect->outline_pixels; ++i) {

            if (simplerect->outline_what & 0x1) {
                  if (begin == simplerect->bbox_ulx) {
                        PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin + i, sy, ey);
                  }
            }

            if (simplerect->outline_what & 0x2) {
                  if (end == (simplerect->bbox_lrx - 1)) {
                        PAINT_VERT(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, end - i, sy, ey + 1);
                  }
            }

            if (simplerect->outline_what & 0x4) {
                  PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end, sy+i);
            }
      
            if (simplerect->outline_what & 0x8) {
                  PAINT_HORIZ(buf, simplerect->outline_r, simplerect->outline_g, simplerect->outline_b, begin, end + 1, ey-i);
            }
      }
}
#endif /* SIMPLERECT_FAST_RENDERER */

static void
gnome_canvas_simplerect_draw (GnomeCanvasItem *item,
                      GdkDrawable *drawable,
                      int x, int y,
                      int width, int height)
{
      fprintf (stderr, "please don't use the CanvasSimpleRect item in a non-aa Canvas\n");
      abort ();
}

static double
gnome_canvas_simplerect_point (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item)
{
      GnomeCanvasSimpleRect *simplerect;
      double x1, y1, x2, y2;
      double dx, dy;

      simplerect = GNOME_CANVAS_SIMPLERECT (item);

      *actual_item = item;

      /* Find the bounds for the rectangle plus its outline width */

      gnome_canvas_simplerect_bounds (item, &x1, &y1, &x2, &y2);

      /* Is point inside rectangle */
      
      if ((x >= x1) && (y >= y1) && (x <= x2) && (y <= y2)) {
            return 0.0;
      }

      /* Point is outside rectangle */

      if (x < x1)
            dx = x1 - x;
      else if (x > x2)
            dx = x - x2;
      else
            dx = 0.0;

      if (y < y1)
            dy = y1 - y;
      else if (y > y2)
            dy = y - y2;
      else
            dy = 0.0;

      return sqrt (dx * dx + dy * dy);
}

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