4 #include <libgnomecanvas/libgnomecanvas.h>
6 #include "canvas-simpleline.h"
7 #include "rgb_macros.h"
9 #define _(Text) dgettext (PACKAGE,Text)
20 static void gnome_canvas_simpleline_class_init (GnomeCanvasSimpleLineClass *class);
22 static void gnome_canvas_simpleline_init (GnomeCanvasSimpleLine *simpleline);
24 static void gnome_canvas_simpleline_destroy (GtkObject *object);
26 static void gnome_canvas_simpleline_set_property (GObject *object,
30 static void gnome_canvas_simpleline_get_property (GObject *object,
35 static void gnome_canvas_simpleline_update (GnomeCanvasItem *item,
40 static void gnome_canvas_simpleline_bounds (GnomeCanvasItem *item,
46 static double gnome_canvas_simpleline_point (GnomeCanvasItem *item,
51 GnomeCanvasItem **actual_item);
53 static void gnome_canvas_simpleline_render (GnomeCanvasItem *item,
56 static void gnome_canvas_simpleline_draw (GnomeCanvasItem *item,
57 GdkDrawable *drawable,
63 static GnomeCanvasItemClass *parent_class;
67 gnome_canvas_simpleline_get_type (void)
69 static GType simpleline_type;
71 if (!simpleline_type) {
72 static const GTypeInfo object_info = {
73 sizeof (GnomeCanvasSimpleLineClass),
75 (GBaseFinalizeFunc) NULL,
76 (GClassInitFunc) gnome_canvas_simpleline_class_init,
77 (GClassFinalizeFunc) NULL,
78 NULL, /* class_data */
79 sizeof (GnomeCanvasSimpleLine),
81 (GInstanceInitFunc) gnome_canvas_simpleline_init,
82 NULL /* value_table */
85 simpleline_type = g_type_register_static (GNOME_TYPE_CANVAS_ITEM, "GnomeCanvasSimpleLine",
89 return simpleline_type;
93 gnome_canvas_simpleline_class_init (GnomeCanvasSimpleLineClass *class)
95 GObjectClass *gobject_class;
96 GtkObjectClass *object_class;
97 GnomeCanvasItemClass *item_class;
99 gobject_class = (GObjectClass *) class;
100 object_class = (GtkObjectClass *) class;
101 item_class = (GnomeCanvasItemClass *) class;
103 parent_class = g_type_class_peek_parent (class);
105 gobject_class->set_property = gnome_canvas_simpleline_set_property;
106 gobject_class->get_property = gnome_canvas_simpleline_get_property;
108 g_object_class_install_property (gobject_class,
110 g_param_spec_double ("x1",
112 _("x coordinate of upper left corner of rect"),
118 g_object_class_install_property (gobject_class,
120 g_param_spec_double ("y1",
122 _("y coordinate of upper left corner of rect "),
129 g_object_class_install_property (gobject_class,
131 g_param_spec_double ("x2",
133 _("x coordinate of lower right corner of rect"),
139 g_object_class_install_property (gobject_class,
141 g_param_spec_double ("y2",
143 _("y coordinate of lower right corner of rect "),
148 g_object_class_install_property (gobject_class,
150 g_param_spec_uint ("color_rgba",
158 object_class->destroy = gnome_canvas_simpleline_destroy;
160 item_class->update = gnome_canvas_simpleline_update;
161 item_class->bounds = gnome_canvas_simpleline_bounds;
162 item_class->point = gnome_canvas_simpleline_point;
163 item_class->render = gnome_canvas_simpleline_render;
164 item_class->draw = gnome_canvas_simpleline_draw;
168 gnome_canvas_simpleline_init (GnomeCanvasSimpleLine *simpleline)
170 simpleline->x1 = 0.0;
171 simpleline->y1 = 0.0;
172 simpleline->x2 = 0.0;
173 simpleline->y2 = 0.0;
174 simpleline->color = RGBA_TO_UINT(98,123,174,241);
175 simpleline->horizontal = TRUE; /* reset in the _update() method */
179 gnome_canvas_simpleline_destroy (GtkObject *object)
181 GnomeCanvasSimpleLine *line;
183 g_return_if_fail (object != NULL);
184 g_return_if_fail (GNOME_IS_CANVAS_SIMPLELINE (object));
186 line = GNOME_CANVAS_SIMPLELINE (object);
188 if (GTK_OBJECT_CLASS (parent_class)->destroy)
189 (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
193 gnome_canvas_simpleline_bounds_world (GnomeCanvasItem *item, int* ix1, int* iy1, int* ix2, int* iy2)
195 double x1, x2, y1, y2;
199 GnomeCanvasSimpleLine *simpleline = GNOME_CANVAS_SIMPLELINE(item);
201 gnome_canvas_simpleline_bounds (item, &x1, &y1, &x2, &y2);
208 gnome_canvas_item_i2w_affine (item, i2w);
209 art_affine_point (&w1, &i1, i2w);
210 art_affine_point (&w2, &i2, i2w);
212 *ix1 = (int) rint(w1.x);
213 *ix2 = (int) rint(w2.x);
214 *iy1 = (int) rint(w1.y);
215 *iy2 = (int) rint(w2.y);
217 /* the update rect has to be of non-zero width and height */
220 simpleline->horizontal = FALSE;
223 simpleline->horizontal = TRUE;
229 gnome_canvas_simpleline_reset_bounds (GnomeCanvasItem *item)
231 int Ix1, Ix2, Iy1, Iy2;
233 gnome_canvas_simpleline_bounds_world (item, &Ix1, &Iy1, &Ix2, &Iy2);
234 gnome_canvas_update_bbox (item, Ix1, Iy1, Ix2, Iy2);
242 gnome_canvas_simpleline_set_property (GObject *object,
250 GnomeCanvasSimpleLine *simpleline;
252 int bounds_changed = FALSE;
254 g_return_if_fail (object != NULL);
255 g_return_if_fail (GNOME_IS_CANVAS_SIMPLELINE (object));
257 simpleline = GNOME_CANVAS_SIMPLELINE (object);
261 if (simpleline->x1 != g_value_get_double (value)) {
262 simpleline->x1 = g_value_get_double (value);
263 bounds_changed = TRUE;
268 if (simpleline->y1 != g_value_get_double (value)) {
269 simpleline->y1 = g_value_get_double (value);
270 bounds_changed = TRUE;
275 if (simpleline->x2 != g_value_get_double (value)) {
276 simpleline->x2 = g_value_get_double (value);
277 bounds_changed = TRUE;
282 if (simpleline->y2 != g_value_get_double (value)) {
283 simpleline->y2 = g_value_get_double (value);
284 bounds_changed = TRUE;
288 case PROP_COLOR_RGBA:
289 if (simpleline->color != g_value_get_uint(value)) {
290 simpleline->color = g_value_get_uint(value);
291 UINT_TO_RGBA (simpleline->color, &simpleline->r, &simpleline->g, &simpleline->b, &simpleline->a);
299 if (update || bounds_changed) {
300 gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(object));
305 gnome_canvas_simpleline_get_property (GObject *object,
310 g_return_if_fail (object != NULL);
311 g_return_if_fail (GNOME_IS_CANVAS_SIMPLELINE (object));
313 GnomeCanvasSimpleLine *line = GNOME_CANVAS_SIMPLELINE (object);
317 g_value_set_double (value, line->x1);
320 g_value_set_double (value, line->x2);
323 g_value_set_double (value, line->y1);
326 g_value_set_double (value, line->y2);
328 case PROP_COLOR_RGBA:
329 g_value_set_uint (value, line->color);
332 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
338 gnome_canvas_simpleline_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
340 GnomeCanvasSimpleLine *simpleline;
344 simpleline = GNOME_CANVAS_SIMPLELINE (item);
346 if (parent_class->update)
347 (* parent_class->update) (item, affine, clip_path, flags);
349 gnome_canvas_simpleline_reset_bounds (item);
354 gnome_canvas_item_i2w (item, &x, &y);
355 gnome_canvas_w2c (GNOME_CANVAS(item->canvas), x, y, &simpleline->bbox_ulx, &simpleline->bbox_uly);
360 gnome_canvas_item_i2w (item, &x, &y);
361 gnome_canvas_w2c (GNOME_CANVAS(item->canvas), x, y, &simpleline->bbox_lrx, &simpleline->bbox_lry);
365 gnome_canvas_simpleline_render (GnomeCanvasItem *item,
368 GnomeCanvasSimpleLine *simpleline;
371 simpleline = GNOME_CANVAS_SIMPLELINE (item);
373 if (parent_class->render) {
374 (*parent_class->render) (item, buf);
378 gnome_canvas_buf_ensure_buf (buf);
382 //begin = MAX(simpleline->bbox_ulx,buf->rect.x0);
383 //end = MIN(simpleline->bbox_lrx,buf->rect.x1);
385 begin = simpleline->bbox_ulx;
386 end = simpleline->bbox_lrx;
388 if (simpleline->color != 0) {
389 if (simpleline->horizontal) {
390 PAINT_HORIZA(buf, simpleline->r, simpleline->g, simpleline->b, simpleline->a,
391 begin, end, simpleline->bbox_uly);
393 PAINT_VERTA(buf, simpleline->r, simpleline->g, simpleline->b, simpleline->a,
394 begin, simpleline->bbox_uly, simpleline->bbox_lry);
400 gnome_canvas_simpleline_draw (GnomeCanvasItem *item,
401 GdkDrawable *drawable,
403 int width, int height)
405 GnomeCanvasSimpleLine *simpleline;
412 simpleline = GNOME_CANVAS_SIMPLELINE (item);
414 cr = gdk_cairo_create (drawable);
416 if (x > simpleline->bbox_ulx) {
419 ulx = simpleline->bbox_ulx;
422 if (y > simpleline->bbox_uly) {
425 uly = simpleline->bbox_uly;
428 if (x + width > simpleline->bbox_lrx) {
429 lrx = simpleline->bbox_lrx;
434 if (y + height > simpleline->bbox_lry) {
435 lry = simpleline->bbox_lry;
445 cairo_set_source_rgba (cr,
449 simpleline->a/255.0);
450 cairo_set_line_width (cr, 1);
451 cairo_move_to (cr, ulx+0.5, uly+0.5);
452 cairo_line_to (cr, lrx+0.5, lry+0.5);
457 gnome_canvas_simpleline_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
459 GnomeCanvasSimpleLine *simpleline = GNOME_CANVAS_SIMPLELINE (item);
461 *x1 = simpleline->x1;
462 *y1 = simpleline->y1;
463 *x2 = simpleline->x2;
464 *y2 = simpleline->y2;
468 gnome_canvas_simpleline_point (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item)
473 GnomeCanvasSimpleLine *simpleline;
474 double x1, y1, x2, y2;
477 simpleline = GNOME_CANVAS_SIMPLELINE (item);
481 /* Find the bounds for the line plus its outline width */
483 gnome_canvas_simpleline_bounds (item, &x1, &y1, &x2, &y2);
485 /* Is point inside line */
487 if ((x >= x1) && (y >= y1) && (x <= x2) && (y <= y2)) {
491 /* Point is outside line */
507 return sqrt (dx * dx + dy * dy);