* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
- * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
-#include <config.h>
-#include <math.h>
-#include <glib/gprintf.h>
-#include <string.h>
-#include "gtkhruler.h"
-#include "gtkalias.h"
-
-
-#define RULER_HEIGHT 14
-#define MINIMUM_INCR 5
-#define MAXIMUM_SUBDIVIDE 5
-#define MAXIMUM_SCALES 10
-
-#define ROUND(x) ((int) ((x) + 0.5))
-
-
-static void gtk_hruler_class_init (GtkHRulerClass *klass);
-static void gtk_hruler_init (GtkHRuler *hruler);
-static gint gtk_hruler_motion_notify (GtkWidget *widget,
- GdkEventMotion *event);
-static void gtk_hruler_draw_ticks (GtkRuler *ruler);
-static void gtk_hruler_draw_pos (GtkRuler *ruler);
-
-
-GType
-gtk_hruler_get_type (void)
-{
- static GType hruler_type = 0;
+#include "config.h"
- if (!hruler_type)
- {
- static const GTypeInfo hruler_info =
- {
- sizeof (GtkHRulerClass),
- NULL, /* base_init */
- NULL, /* base_finalize */
- (GClassInitFunc) gtk_hruler_class_init,
- NULL, /* class_finalize */
- NULL, /* class_data */
- sizeof (GtkHRuler),
- 0, /* n_preallocs */
- (GInstanceInitFunc) gtk_hruler_init,
- };
+#include "gtkhruler.h"
+#include "gtkorientable.h"
- hruler_type = g_type_register_static (GTK_TYPE_RULER, "GtkHRuler",
- &hruler_info, 0);
- }
- return hruler_type;
-}
+G_DEFINE_TYPE (GtkHRuler, gtk_hruler, GTK_TYPE_RULER)
static void
gtk_hruler_class_init (GtkHRulerClass *klass)
{
- GtkWidgetClass *widget_class;
- GtkRulerClass *ruler_class;
-
- widget_class = (GtkWidgetClass*) klass;
- ruler_class = (GtkRulerClass*) klass;
-
- widget_class->motion_notify_event = gtk_hruler_motion_notify;
-
- ruler_class->draw_ticks = gtk_hruler_draw_ticks;
- ruler_class->draw_pos = gtk_hruler_draw_pos;
}
static void
gtk_hruler_init (GtkHRuler *hruler)
{
- GtkWidget *widget;
-
- widget = GTK_WIDGET (hruler);
- widget->requisition.width = widget->style->xthickness * 2 + 1;
- widget->requisition.height = widget->style->ythickness * 2 + RULER_HEIGHT;
+ gtk_orientable_set_orientation (GTK_ORIENTABLE (hruler),
+ GTK_ORIENTATION_HORIZONTAL);
}
-
-GtkWidget*
+GtkWidget *
gtk_hruler_new (void)
{
return g_object_new (GTK_TYPE_HRULER, NULL);
}
-
-static gint
-gtk_hruler_motion_notify (GtkWidget *widget,
- GdkEventMotion *event)
-{
- GtkRuler *ruler;
- gint x;
-
- ruler = GTK_RULER (widget);
-
- if (event->is_hint)
- gdk_window_get_pointer (widget->window, &x, NULL, NULL);
- else
- x = event->x;
-
- ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * x) / widget->allocation.width;
- g_object_notify (G_OBJECT (ruler), "position");
-
- /* Make sure the ruler has been allocated already */
- if (ruler->backing_store != NULL)
- gtk_ruler_draw_pos (ruler);
-
- return FALSE;
-}
-
-static void
-gtk_hruler_draw_ticks (GtkRuler *ruler)
-{
- GtkWidget *widget;
- cairo_t *cr;
- gint i;
- gint width, height;
- gint xthickness;
- gint ythickness;
- gint length, ideal_length;
- gdouble lower, upper; /* Upper and lower limits, in ruler units */
- gdouble increment; /* Number of pixels per unit */
- gint scale; /* Number of units per major unit */
- gdouble subd_incr;
- gdouble start, end, cur;
- gchar unit_str[32];
- gint digit_height;
- gint digit_offset;
- gint text_width;
- gint pos;
- PangoLayout *layout;
- PangoRectangle logical_rect, ink_rect;
-
- if (!GTK_WIDGET_DRAWABLE (ruler))
- return;
-
- widget = GTK_WIDGET (ruler);
-
- xthickness = widget->style->xthickness;
- ythickness = widget->style->ythickness;
-
- layout = gtk_widget_create_pango_layout (widget, "012456789");
- pango_layout_get_extents (layout, &ink_rect, &logical_rect);
-
- digit_height = PANGO_PIXELS (ink_rect.height) + 2;
- digit_offset = ink_rect.y;
-
- width = widget->allocation.width;
- height = widget->allocation.height - ythickness * 2;
-
- gtk_paint_box (widget->style, ruler->backing_store,
- GTK_STATE_NORMAL, GTK_SHADOW_OUT,
- NULL, widget, "hruler",
- 0, 0,
- widget->allocation.width, widget->allocation.height);
-
- cr = gdk_cairo_create (ruler->backing_store);
- gdk_cairo_set_source_color (cr, &widget->style->fg[widget->state]);
-
- cairo_rectangle (cr,
- xthickness,
- height + ythickness,
- widget->allocation.width - 2 * xthickness,
- 1);
-
- upper = ruler->upper / ruler->metric->pixels_per_unit;
- lower = ruler->lower / ruler->metric->pixels_per_unit;
-
- if ((upper - lower) == 0)
- return;
- increment = (gdouble) width / (upper - lower);
-
- /* determine the scale
- * We calculate the text size as for the vruler instead of using
- * text_width = gdk_string_width(font, unit_str), so that the result
- * for the scale looks consistent with an accompanying vruler
- */
- scale = ceil (ruler->max_size / ruler->metric->pixels_per_unit);
- g_snprintf (unit_str, sizeof (unit_str), "%d", scale);
- text_width = strlen (unit_str) * digit_height + 1;
-
- for (scale = 0; scale < MAXIMUM_SCALES; scale++)
- if (ruler->metric->ruler_scale[scale] * fabs(increment) > 2 * text_width)
- break;
-
- if (scale == MAXIMUM_SCALES)
- scale = MAXIMUM_SCALES - 1;
-
- /* drawing starts here */
- length = 0;
- for (i = MAXIMUM_SUBDIVIDE - 1; i >= 0; i--)
- {
- subd_incr = (gdouble) ruler->metric->ruler_scale[scale] /
- (gdouble) ruler->metric->subdivide[i];
- if (subd_incr * fabs(increment) <= MINIMUM_INCR)
- continue;
-
- /* Calculate the length of the tickmarks. Make sure that
- * this length increases for each set of ticks
- */
- ideal_length = height / (i + 1) - 1;
- if (ideal_length > ++length)
- length = ideal_length;
-
- if (lower < upper)
- {
- start = floor (lower / subd_incr) * subd_incr;
- end = ceil (upper / subd_incr) * subd_incr;
- }
- else
- {
- start = floor (upper / subd_incr) * subd_incr;
- end = ceil (lower / subd_incr) * subd_incr;
- }
-
-
- for (cur = start; cur <= end; cur += subd_incr)
- {
- pos = ROUND ((cur - lower) * increment);
-
- cairo_rectangle (cr,
- pos, height + ythickness - length,
- 1, length);
-
- /* draw label */
- if (i == 0)
- {
- g_snprintf (unit_str, sizeof (unit_str), "%d", (int) cur);
-
- pango_layout_set_text (layout, unit_str, -1);
- pango_layout_get_extents (layout, &logical_rect, NULL);
-
- gtk_paint_layout (widget->style,
- ruler->backing_store,
- GTK_WIDGET_STATE (widget),
- FALSE,
- NULL,
- widget,
- "hruler",
- pos + 2, ythickness + PANGO_PIXELS (logical_rect.y - digit_offset),
- layout);
- }
- }
- }
-
- cairo_fill (cr);
- cairo_destroy (cr);
-
- g_object_unref (layout);
-}
-
-static void
-gtk_hruler_draw_pos (GtkRuler *ruler)
-{
- GtkWidget *widget = GTK_WIDGET (ruler);
- gint x, y;
- gint width, height;
- gint bs_width, bs_height;
- gint xthickness;
- gint ythickness;
- gdouble increment;
-
- if (GTK_WIDGET_DRAWABLE (ruler))
- {
- xthickness = widget->style->xthickness;
- ythickness = widget->style->ythickness;
- width = widget->allocation.width;
- height = widget->allocation.height - ythickness * 2;
-
- bs_width = height / 2 + 2;
- bs_width |= 1; /* make sure it's odd */
- bs_height = bs_width / 2 + 1;
-
- if ((bs_width > 0) && (bs_height > 0))
- {
- cairo_t *cr = gdk_cairo_create (widget->window);
-
- /* If a backing store exists, restore the ruler */
- if (ruler->backing_store)
- gdk_draw_drawable (widget->window,
- widget->style->black_gc,
- ruler->backing_store,
- ruler->xsrc, ruler->ysrc,
- ruler->xsrc, ruler->ysrc,
- bs_width, bs_height);
-
- increment = (gdouble) width / (ruler->upper - ruler->lower);
-
- x = ROUND ((ruler->position - ruler->lower) * increment) + (xthickness - bs_width) / 2 - 1;
- y = (height + bs_height) / 2 + ythickness;
-
- gdk_cairo_set_source_color (cr, &widget->style->fg[widget->state]);
-
- cairo_move_to (cr, x, y);
- cairo_line_to (cr, x + bs_width / 2., y + bs_height);
- cairo_line_to (cr, x + bs_width, y);
- cairo_fill (cr);
-
- cairo_destroy (cr);
-
- ruler->xsrc = x;
- ruler->ysrc = y;
- }
- }
-}
-
-#define __GTK_HRULER_C__
-#include "gtkaliasdef.c"
projects / ~andy / gtk / blobdiff