static void
goo_demo_item_init (GooDemoItem *demo_item)
{
- demo_item->x = 0.0;
- demo_item->y = 0.0;
demo_item->width = 0.0;
demo_item->height = 0.0;
}
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 width,
- gdouble height,
- 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->x = x;
- demo_item->y = y;
demo_item->width = width;
demo_item->height = height;
- demo_item->letter = letter;
+ 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);
}
+ cairo_matrix_init_translate (&matrix, x, y);
+ goo_canvas_item_set_transform (item, &matrix);
+
return item;
}
GooDemoItem *demo_item = (GooDemoItem*) simple;
/* Compute the new bounds. */
- simple->bounds.x1 = demo_item->x;
- simple->bounds.y1 = demo_item->y;
- simple->bounds.x2 = demo_item->x + demo_item->width;
- simple->bounds.y2 = demo_item->y + demo_item->height;
+ simple->bounds.x1 = 0;
+ simple->bounds.y1 = 0;
+ 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) MIN (item->width / 2, item->height / 2);
- int cx = item->x + item->width / 2;
- int cy = item->y + item->height / 2;
- 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);
- cairo_move_to (cr,
- cx - extents.width / 2 - extents.x_bearing,
- cy - extents.height / 2 - extents.y_bearing);
-
- cairo_set_source_rgb (cr, 0.2, 0.3, 0.8);
- 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 < demo_item->x || (x > demo_item->x + demo_item->width)
- || y < demo_item->y || (y > demo_item->y + demo_item->height))
+ if (x < 0 || (x > demo_item->width)
+ || y < 0 || (y > demo_item->height))
return NULL;
return (GooCanvasItem*) simple;