453 lines
10 KiB
C
453 lines
10 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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PROP_0,
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PROP_X1,
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PROP_Y1,
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PROP_X2,
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PROP_Y2,
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PROP_FRAMES_PER_UNIT,
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PROP_FILL_COLOR,
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PROP_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 (GObject *object,
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guint prop_id
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const GValue *value,
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GParamSpec *pspec);
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static void gnome_canvas_ruler_get_arg (GObject *object,
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guint prop_id
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GValue *value,
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GParamSpec *pspec);
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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 = G_OBJECT_CLASS (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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object_class->set_property = gnome_canvas_ruler_set_property;
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object_class->get_property = gnome_canvas_ruler_get_property;
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g_object_class_install_property (object_class,
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PROP_X1,
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g_param_spec_double ("x1",
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_("x1"),
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_("x coordinate of upper left corner of rect"),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_Y1,
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g_param_spec_double ("y1",
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_("y1"),
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_("y coordinate of upper left corner of rect "),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_X2,
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g_param_spec_double ("x2",
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_("x2"),
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_("x coordinate of lower right corner of rect"),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_Y2,
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g_param_spec_double ("y2",
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_("y2"),
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_("y coordinate of lower right corner of rect "),
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-G_MAXDOUBLE,
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G_MAXDOUBLE,
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0.0,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_FRAMES_PER_UNIT,
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g_param_spec_long ("frames_per_unit",
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_("frames_per_unit"),
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_("frames_per_unit of ruler"),
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-G_MAXLONG,
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G_MAXLONG,
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0,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_FILL_COLOR,
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g_param_spec_uint ("fill_color",
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_("fill color"),
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_("color of fill"),
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0,
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G_MAXINT,
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0,
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G_PARAM_READWRITE));
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g_object_class_install_property (object_class,
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PROP_TICK_COLOR,
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g_param_spec_uint ("tick_color",
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_("tick color"),
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_("color of tick"),
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0,
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G_MAXINT,
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0,
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G_PARAM_READWRITE));
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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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}
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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_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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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 (prop_id) {
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case PROP_X1:
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if (ruler->x1 != g_value_get_double (value)) {
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ruler->x1 = g_value_get_double (value);
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calc_bounds = TRUE;
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}
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break;
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case PROP_Y1:
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if (ruler->y1 != g_value_get_double (value)) {
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ruler->y1 = g_value_get_double (value);
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calc_bounds = TRUE;
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}
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break;
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case PROP_X2:
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if (ruler->x2 != g_value_get_double (value)) {
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ruler->x2 = g_value_get_double (value);
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calc_bounds = TRUE;
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}
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break;
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case PROP_Y2:
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if (ruler->y2 != g_value_get_double (value)) {
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ruler->y2 = g_value_get_double (value);
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calc_bounds = TRUE;
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}
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break;
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case PROP_FRAMES_PER_UNIT:
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if (ruler->frames_per_unit != g_value_get_long(value)) {
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ruler->frames_per_unit = g_value_get_long(value);
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redraw = TRUE;
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}
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break;
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case PROP_FILL_COLOR:
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if (ruler->fill_color != g_value_get_uint(value)) {
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ruler->fill_color = g_value_get_uint(value);
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redraw = TRUE;
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}
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break;
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case PROP_TICK_COLOR:
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if (ruler->tick_color != g_value_get_uint(value)) {
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ruler->tick_color = g_value_get_uint(value);
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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_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GnomeCanvasRuler *ruler;
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ruler = GNOME_CANVAS_RULER (object);
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switch (prop_id) {
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case PROP_X1:
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g_value_set_double (value, ruler->x1);
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break;
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case PROP_Y1:
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g_value_set_double (value, ruler->y1);
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break;
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case PROP_X2:
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g_value_set_double (value, ruler->x2);
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break;
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case PROP_Y2:
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g_value_set_double (value, ruler->y2);
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break;
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case PROP_FRAMES_PER_UNIT:
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g_value_set_long (value, ruler->frames_per_unit);
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break;
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case PROP_FILL_COLOR:
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g_value_set_uint (value, ruler->fill_color);
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break;
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case PROP_TICK_COLOR:
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g_value_set_uint (value, 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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