382 lines
9.0 KiB
C
382 lines
9.0 KiB
C
#include <stdio.h>
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#include <math.h>
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#include <libgnomecanvas/libgnomecanvas.h>
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#include "canvas-ruler.h"
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#include "rgb_macros.h"
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enum {
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ARG_0,
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ARG_X1,
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ARG_Y1,
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ARG_X2,
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ARG_Y2,
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ARG_FRAMES_PER_UNIT,
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ARG_FILL_COLOR,
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ARG_TICK_COLOR
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};
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static void gnome_canvas_ruler_class_init (GnomeCanvasRulerClass *class);
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static void gnome_canvas_ruler_init (GnomeCanvasRuler *ruler);
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static void gnome_canvas_ruler_set_arg (GtkObject *object,
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GtkArg *arg,
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guint arg_id);
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static void gnome_canvas_ruler_get_arg (GtkObject *object,
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GtkArg *arg,
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guint arg_id);
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static void gnome_canvas_ruler_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags);
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static void gnome_canvas_ruler_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2);
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static double gnome_canvas_ruler_point (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item);
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static void gnome_canvas_ruler_render (GnomeCanvasItem *item, GnomeCanvasBuf *buf);
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static void gnome_canvas_ruler_draw (GnomeCanvasItem *item, GdkDrawable *drawable, int x, int y, int w, int h);
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static GnomeCanvasItemClass *parent_class;
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GtkType
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gnome_canvas_ruler_get_type (void)
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{
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static GtkType ruler_type = 0;
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if (!ruler_type) {
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GtkTypeInfo ruler_info = {
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"GnomeCanvasRuler",
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sizeof (GnomeCanvasRuler),
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sizeof (GnomeCanvasRulerClass),
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(GtkClassInitFunc) gnome_canvas_ruler_class_init,
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(GtkObjectInitFunc) gnome_canvas_ruler_init,
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NULL, /* reserved_1 */
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NULL, /* reserved_2 */
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(GtkClassInitFunc) NULL
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};
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ruler_type = gtk_type_unique (gnome_canvas_item_get_type (), &ruler_info);
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}
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return ruler_type;
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}
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static void
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gnome_canvas_ruler_class_init (GnomeCanvasRulerClass *class)
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{
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GtkObjectClass *object_class;
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GnomeCanvasItemClass *item_class;
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object_class = (GtkObjectClass *) class;
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item_class = (GnomeCanvasItemClass *) class;
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parent_class = gtk_type_class (gnome_canvas_item_get_type ());
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gtk_object_add_arg_type ("GnomeCanvasRuler::x1", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_X1);
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gtk_object_add_arg_type ("GnomeCanvasRuler::y1", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_Y1);
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gtk_object_add_arg_type ("GnomeCanvasRuler::x2", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_X2);
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gtk_object_add_arg_type ("GnomeCanvasRuler::y2", GTK_TYPE_DOUBLE, GTK_ARG_READWRITE, ARG_Y2);
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gtk_object_add_arg_type ("GnomeCanvasRuler::frames_per_unit", GTK_TYPE_LONG, GTK_ARG_READWRITE, ARG_FRAMES_PER_UNIT);
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gtk_object_add_arg_type ("GnomeCanvasRuler::fill_color", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_FILL_COLOR);
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gtk_object_add_arg_type ("GnomeCanvasRuler::tick_color", GTK_TYPE_INT, GTK_ARG_READWRITE, ARG_TICK_COLOR);
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object_class->set_arg = gnome_canvas_ruler_set_arg;
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object_class->get_arg = gnome_canvas_ruler_get_arg;
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item_class->update = gnome_canvas_ruler_update;
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item_class->bounds = gnome_canvas_ruler_bounds;
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item_class->point = gnome_canvas_ruler_point;
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item_class->render = gnome_canvas_ruler_render;
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item_class->draw = gnome_canvas_ruler_draw;
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}
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static void
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gnome_canvas_ruler_init (GnomeCanvasRuler *ruler)
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{
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ruler->x1 = 0.0;
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ruler->y1 = 0.0;
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ruler->x2 = 0.0;
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ruler->y2 = 0.0;
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ruler->frames_per_unit = 1;
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ruler->fill_color = 0;
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ruler->tick_color = 0;
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GNOME_CANVAS_ITEM(ruler)->object.flags |= GNOME_CANVAS_ITEM_NO_AUTO_REDRAW;
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}
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static void
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gnome_canvas_ruler_reset_bounds (GnomeCanvasItem *item)
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{
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double x1, x2, y1, y2;
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ArtPoint i1, i2;
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ArtPoint w1, w2;
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int Ix1, Ix2, Iy1, Iy2;
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double i2w[6];
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gnome_canvas_ruler_bounds (item, &x1, &y1, &x2, &y2);
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i1.x = x1;
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i1.y = y1;
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i2.x = x2;
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i2.y = y2;
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gnome_canvas_item_i2w_affine (item, i2w);
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art_affine_point (&w1, &i1, i2w);
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art_affine_point (&w2, &i2, i2w);
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Ix1 = (int) rint(w1.x);
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Ix2 = (int) rint(w2.x);
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Iy1 = (int) rint(w1.y);
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Iy2 = (int) rint(w2.y);
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gnome_canvas_update_bbox (item, Ix1, Iy1, Ix2, Iy2);
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}
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/*
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* CANVAS CALLBACKS
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*/
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static void
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gnome_canvas_ruler_set_arg (GtkObject *object, GtkArg *arg, guint arg_id)
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{
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GnomeCanvasItem *item;
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GnomeCanvasRuler *ruler;
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int redraw;
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int calc_bounds;
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item = GNOME_CANVAS_ITEM (object);
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ruler = GNOME_CANVAS_RULER (object);
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redraw = FALSE;
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calc_bounds = FALSE;
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switch (arg_id) {
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case ARG_X1:
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if (ruler->x1 != GTK_VALUE_DOUBLE (*arg)) {
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ruler->x1 = GTK_VALUE_DOUBLE (*arg);
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calc_bounds = TRUE;
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}
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break;
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case ARG_Y1:
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if (ruler->y1 != GTK_VALUE_DOUBLE (*arg)) {
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ruler->y1 = GTK_VALUE_DOUBLE (*arg);
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calc_bounds = TRUE;
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}
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break;
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case ARG_X2:
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if (ruler->x2 != GTK_VALUE_DOUBLE (*arg)) {
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ruler->x2 = GTK_VALUE_DOUBLE (*arg);
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calc_bounds = TRUE;
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}
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break;
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case ARG_Y2:
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if (ruler->y2 != GTK_VALUE_DOUBLE (*arg)) {
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ruler->y2 = GTK_VALUE_DOUBLE (*arg);
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calc_bounds = TRUE;
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}
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break;
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case ARG_FRAMES_PER_UNIT:
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if (ruler->frames_per_unit != GTK_VALUE_LONG(*arg)) {
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ruler->frames_per_unit = GTK_VALUE_LONG(*arg);
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redraw = TRUE;
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}
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break;
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case ARG_FILL_COLOR:
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if (ruler->fill_color != GTK_VALUE_INT(*arg)) {
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ruler->fill_color = GTK_VALUE_INT(*arg);
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redraw = TRUE;
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}
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break;
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case ARG_TICK_COLOR:
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if (ruler->tick_color != GTK_VALUE_INT(*arg)) {
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ruler->tick_color = GTK_VALUE_INT(*arg);
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redraw = TRUE;
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}
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break;
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default:
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break;
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}
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if (calc_bounds) {
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gnome_canvas_ruler_reset_bounds (item);
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}
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if (redraw) {
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gnome_canvas_item_request_update (item);
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}
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}
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static void
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gnome_canvas_ruler_get_arg (GtkObject *object, GtkArg *arg, guint arg_id)
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{
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GnomeCanvasRuler *ruler;
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ruler = GNOME_CANVAS_RULER (object);
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switch (arg_id) {
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case ARG_X1:
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GTK_VALUE_DOUBLE (*arg) = ruler->x1;
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break;
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case ARG_Y1:
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GTK_VALUE_DOUBLE (*arg) = ruler->y1;
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break;
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case ARG_X2:
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GTK_VALUE_DOUBLE (*arg) = ruler->x2;
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break;
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case ARG_Y2:
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GTK_VALUE_DOUBLE (*arg) = ruler->y2;
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break;
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case ARG_FRAMES_PER_UNIT:
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GTK_VALUE_LONG (*arg) = ruler->frames_per_unit;
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break;
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case ARG_FILL_COLOR:
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GTK_VALUE_INT (*arg) = ruler->fill_color;
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break;
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case ARG_TICK_COLOR:
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GTK_VALUE_INT (*arg) = ruler->tick_color;
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break;
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default:
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arg->type = GTK_TYPE_INVALID;
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break;
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}
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}
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static void
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gnome_canvas_ruler_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
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{
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GnomeCanvasRuler *ruler;
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double x;
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double y;
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ruler = GNOME_CANVAS_RULER (item);
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if (parent_class->update)
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(* parent_class->update) (item, affine, clip_path, flags);
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gnome_canvas_ruler_reset_bounds (item);
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x = ruler->x1;
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y = ruler->y1;
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gnome_canvas_item_i2w (item, &x, &y);
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gnome_canvas_w2c (GNOME_CANVAS(item->canvas), x, y, &ruler->bbox_ulx, &ruler->bbox_uly);
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x = ruler->x2;
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y = ruler->y2;
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gnome_canvas_item_i2w (item, &x, &y);
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gnome_canvas_w2c (GNOME_CANVAS(item->canvas), x, y, &ruler->bbox_lrx, &ruler->bbox_lry);
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UINT_TO_RGB (ruler->tick_color, &ruler->tick_r, &ruler->tick_g, &ruler->tick_b);
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UINT_TO_RGB (ruler->fill_color, &ruler->fill_r, &ruler->fill_g, &ruler->fill_b);
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}
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static void
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gnome_canvas_ruler_render (GnomeCanvasItem *item,
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GnomeCanvasBuf *buf)
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{
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GnomeCanvasRuler *ruler;
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int end, begin;
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ruler = GNOME_CANVAS_RULER (item);
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if (parent_class->render) {
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(*parent_class->render) (item, buf);
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}
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if (buf->is_bg) {
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gnome_canvas_buf_ensure_buf (buf);
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buf->is_bg = FALSE;
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}
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begin = MAX(ruler->bbox_ulx,buf->rect.x0);
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if (ruler->bbox_lrx >= 0) {
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end = MIN(ruler->bbox_lrx,buf->rect.x1);
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} else {
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end = buf->rect.x1;
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}
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if (begin == end) {
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return;
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}
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PAINT_BOX (buf, ruler->fill_r, ruler->fill_g, ruler->fill_b, 255, begin, ruler->bbox_uly, end, ruler->bbox_lry - 1);
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PAINT_HORIZ (buf, ruler->tick_r, ruler->tick_g, ruler->tick_b, begin, end, ruler->bbox_lry - 1);
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}
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static void
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gnome_canvas_ruler_draw (GnomeCanvasItem *item,
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GdkDrawable *drawable,
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int x, int y,
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int width, int height)
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{
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GnomeCanvasRuler *ruler;
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ruler = GNOME_CANVAS_RULER (item);
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if (parent_class->draw) {
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(* parent_class->draw) (item, drawable, x, y, width, height);
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}
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fprintf (stderr, "please don't use the CanvasRuler item in a non-aa Canvas\n");
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abort ();
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}
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static void
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gnome_canvas_ruler_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
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{
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GnomeCanvasRuler *ruler = GNOME_CANVAS_RULER (item);
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*x1 = ruler->x1;
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*y1 = ruler->y1;
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*x2 = ruler->x2;
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*y2 = ruler->y2;
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}
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static double
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gnome_canvas_ruler_point (GnomeCanvasItem *item, double x, double y, int cx, int cy, GnomeCanvasItem **actual_item)
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{
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GnomeCanvasRuler *ruler;
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double x1, y1, x2, y2;
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double dx, dy;
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ruler = GNOME_CANVAS_RULER (item);
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*actual_item = item;
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/* Find the bounds for the rectangle plus its outline width */
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gnome_canvas_ruler_bounds (item, &x1, &y1, &x2, &y2);
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/* Is point inside rectangle */
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if ((x >= x1) && (y >= y1) && (x <= x2) && (y <= y2)) {
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return 0.0;
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}
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/* Point is outside rectangle */
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if (x < x1)
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dx = x1 - x;
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else if (x > x2)
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dx = x - x2;
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else
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dx = 0.0;
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if (y < y1)
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dy = y1 - y;
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else if (y > y2)
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dy = y - y2;
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else
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dy = 0.0;
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return sqrt (dx * dx + dy * dy);
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}
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