static void
goo_demo_item_init (GooDemoItem *demo_item)
{
- demo_item->size = 0.0;
-}
-
-void
-goo_demo_item_move_to (GooCanvasItem *item,
- gdouble x,
- gdouble y)
-{
- cairo_matrix_t matrix;
-
- cairo_matrix_init_translate (&matrix, x, y);
- goo_canvas_item_set_transform (item, &matrix);
-}
-
-void
-goo_demo_item_glide_to (GooCanvasItem *item,
- gdouble x,
- gdouble y)
-{
- goo_canvas_item_animate (item, x, y,
- 1.0, 0,
- 1000, 40,
- GOO_CANVAS_ANIMATE_FREEZE);
+ demo_item->width = 0.0;
+ demo_item->height = 0.0;
}
/* The convenience function to create new items. This should start with a
parent argument and end with a variable list of object properties to fit
in with the standard canvas items. */
GooCanvasItem*
-goo_demo_item_new (GooCanvasItem *parent,
- gdouble x,
- gdouble y,
- gdouble size,
- char letter,
+goo_demo_item_new (GooCanvasItem *parent,
+ gdouble x,
+ gdouble y,
+ gdouble width,
+ gdouble height,
+ GooDemoItemPaintFunc paint,
+ void *closure,
...)
{
GooCanvasItem *item;
GooDemoItem *demo_item;
const char *first_property;
va_list var_args;
+ cairo_matrix_t matrix;
item = g_object_new (GOO_TYPE_DEMO_ITEM, NULL);
demo_item = (GooDemoItem*) item;
- demo_item->size = size;
- demo_item->letter = letter;
+ demo_item->width = width;
+ demo_item->height = height;
+ demo_item->paint = paint;
+ demo_item->closure = closure;
- va_start (var_args, letter);
+ va_start (var_args, closure);
first_property = va_arg (var_args, char*);
if (first_property)
g_object_set_valist ((GObject*) item, first_property, var_args);
g_object_unref (item);
}
- goo_demo_item_move_to (item, x, y);
+ cairo_matrix_init_translate (&matrix, x, y);
+ goo_canvas_item_set_transform (item, &matrix);
return item;
}
/* Compute the new bounds. */
simple->bounds.x1 = 0;
simple->bounds.y1 = 0;
- simple->bounds.x2 = demo_item->size;
- simple->bounds.y2 = demo_item->size;
+ simple->bounds.x2 = demo_item->width;
+ simple->bounds.y2 = demo_item->height;
/* Convert to device coordinates. */
goo_canvas_item_simple_user_bounds_to_device (simple, cr, &simple->bounds);
GooCanvasBounds *bounds)
{
GooDemoItem *item = (GooDemoItem*) simple;
- cairo_pattern_t *gradient;
- cairo_text_extents_t extents;
- int rad = (int) (item->size / 2);
- int cx = item->size / 2;
- int cy = cx;
- int tx, ty;
- double spot_angle = M_PI / 4.0;
- double spot_rad = rad / 2.0;
- char string[2];
-
- cairo_save (cr);
-
- gradient = cairo_pattern_create_radial (cx - spot_rad * cos (spot_angle),
- cy - spot_rad * sin (spot_angle),
- 0.0,
- cx - spot_rad * cos (spot_angle),
- cy - spot_rad * sin (spot_angle),
- rad + spot_rad);
- cairo_pattern_add_color_stop_rgb (gradient, 0.0, 1.0, 1.0, 1.0);
- cairo_pattern_add_color_stop_rgb (gradient, 1.0, 0.33, 0.33, 0.33);
-
- cairo_set_source (cr, gradient);
-
- cairo_arc (cr,
- cx, cy,
- rad, 0, 2 * M_PI);
-
- cairo_fill (cr);
-
- cairo_select_font_face (cr, "mono",
- CAIRO_FONT_SLANT_NORMAL,
- CAIRO_FONT_WEIGHT_BOLD);
- cairo_set_font_size (cr, 1.8 * rad);
-
- string[0] = item->letter;
- string[1] = '\0';
- cairo_text_extents (cr, string, &extents);
- tx = cx - extents.width / 2 - extents.x_bearing;
- ty = cy - extents.height / 2 - extents.y_bearing;
-
- cairo_set_source_rgb (cr, 0.7, 0.7, 0.7);
- cairo_move_to (cr, tx + 1, ty + 1);
- cairo_show_text (cr, string);
-
- cairo_set_source_rgb (cr, 0.33, 0.33, 0.33);
- cairo_move_to (cr, tx - 1, ty - 1);
- cairo_show_text (cr, string);
-
- cairo_set_source_rgb (cr, 0.2, 0.3, 0.8);
- cairo_move_to (cr, tx, ty);
- cairo_show_text (cr, string);
-
- cairo_restore (cr);
+
+ item->paint (cr, item->closure, item->width, item->height);
}
/* Hit detection. This should check if the given coordinate (in the item's
{
GooDemoItem *demo_item = (GooDemoItem*) simple;
- if (x < 0 || (x > demo_item->size)
- || y < 0 || (y > demo_item->size))
+ if (x < 0 || (x > demo_item->width)
+ || y < 0 || (y > demo_item->height))
return NULL;
return (GooCanvasItem*) simple;