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Bug 553585 – Add orientation API to GtkRuler

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2008-10-02  Michael Natterer  <mitch@imendio.com>

	Bug 553585 – Add orientation API to GtkRuler

	* gtk/gtkruler.[ch]: implement the GtkOrientable interface and
	swallow all code from GtkHRuler and GtkVRuler. Add gtk_ruler_new()
	which takes a GtkOrientation argument.

	* gtk/gtkhruler.c
	* gtk/gtkvruler.c: remove all code except the constructor and
	call gtk_orientable_set_orientation() in init().

	* gtk/gtk.symbols: add gtk_ruler_new().


svn path=/trunk/; revision=21565
This commit is contained in:
Michael Natterer 2008-10-02 15:13:23 +00:00 committed by Michael Natterer
parent 0697bb7942
commit 2accfccc90
6 changed files with 495 additions and 564 deletions
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14
ChangeLog
View File

@ -1,3 +1,17 @@
2008-10-02 Michael Natterer <mitch@imendio.com>
Bug 553585 – Add orientation API to GtkRuler
* gtk/gtkruler.[ch]: implement the GtkOrientable interface and
swallow all code from GtkHRuler and GtkVRuler. Add gtk_ruler_new()
which takes a GtkOrientation argument.
* gtk/gtkhruler.c
* gtk/gtkvruler.c: remove all code except the constructor and
call gtk_orientable_set_orientation() in init().
* gtk/gtk.symbols: add gtk_ruler_new().
2008-10-01 Torsten Schoenfeld <kaffeetisch@gmx.de>
* docs/reference/gtk/gtk-sections.txt:

1
gtk/gtk.symbols
View File

@ -3387,6 +3387,7 @@ gtk_ruler_draw_pos
gtk_ruler_draw_ticks
gtk_ruler_get_metric
gtk_ruler_get_range
gtk_ruler_new
gtk_ruler_get_type G_GNUC_CONST
gtk_ruler_set_metric
gtk_ruler_set_range

262
gtk/gtkhruler.c
View File

@ -21,284 +21,34 @@
* 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 "gtkintl.h"
#include "gtkorientable.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 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);
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);
gdk_event_request_motions (event);
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)
goto out;
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);
out:
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"

479
gtk/gtkruler.c
View File

@ -21,17 +21,31 @@
* 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 <string.h>
#include "gtkorientable.h"
#include "gtkruler.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "gtkalias.h"
#define RULER_WIDTH 14
#define MINIMUM_INCR 5
#define MAXIMUM_SUBDIVIDE 5
#define MAXIMUM_SCALES 10
#define ROUND(x) ((int) ((x) + 0.5))
enum {
PROP_0,
PROP_ORIENTATION,
PROP_LOWER,
PROP_UPPER,
PROP_POSITION,
@ -39,21 +53,38 @@ enum {
PROP_METRIC
};
static void gtk_ruler_realize (GtkWidget *widget);
static void gtk_ruler_unrealize (GtkWidget *widget);
static void gtk_ruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gint gtk_ruler_expose (GtkWidget *widget,
GdkEventExpose *event);
static void gtk_ruler_make_pixmap (GtkRuler *ruler);
static void gtk_ruler_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_ruler_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
typedef struct _GtkRulerPrivate GtkRulerPrivate;
struct _GtkRulerPrivate
{
GtkOrientation orientation;
};
#define GTK_RULER_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_RULER, GtkRulerPrivate))
static void gtk_ruler_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_ruler_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_ruler_realize (GtkWidget *widget);
static void gtk_ruler_unrealize (GtkWidget *widget);
static void gtk_ruler_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_ruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static gboolean gtk_ruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static gboolean gtk_ruler_expose (GtkWidget *widget,
GdkEventExpose *event);
static void gtk_ruler_make_pixmap (GtkRuler *ruler);
static void gtk_ruler_real_draw_ticks (GtkRuler *ruler);
static void gtk_ruler_real_draw_pos (GtkRuler *ruler);
static const GtkRulerMetric ruler_metrics[] =
{
@ -62,27 +93,34 @@ static const GtkRulerMetric ruler_metrics[] =
{ "Centimeters", "Cn", 28.35, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
};
G_DEFINE_TYPE (GtkRuler, gtk_ruler, GTK_TYPE_WIDGET)
G_DEFINE_TYPE_WITH_CODE (GtkRuler, gtk_ruler, GTK_TYPE_WIDGET,
G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE,
NULL))
static void
gtk_ruler_class_init (GtkRulerClass *class)
{
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
gobject_class = G_OBJECT_CLASS (class);
widget_class = (GtkWidgetClass*) class;
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
gobject_class->set_property = gtk_ruler_set_property;
gobject_class->get_property = gtk_ruler_get_property;
widget_class->realize = gtk_ruler_realize;
widget_class->unrealize = gtk_ruler_unrealize;
widget_class->size_request = gtk_ruler_size_request;
widget_class->size_allocate = gtk_ruler_size_allocate;
widget_class->motion_notify_event = gtk_ruler_motion_notify;
widget_class->expose_event = gtk_ruler_expose;
class->draw_ticks = NULL;
class->draw_pos = NULL;
class->draw_ticks = gtk_ruler_real_draw_ticks;
class->draw_pos = gtk_ruler_real_draw_pos;
g_object_class_override_property (gobject_class,
PROP_ORIENTATION,
"orientation");
g_object_class_install_property (gobject_class,
PROP_LOWER,
@ -138,11 +176,21 @@ gtk_ruler_class_init (GtkRulerClass *class)
GTK_TYPE_METRIC_TYPE,
GTK_PIXELS,
GTK_PARAM_READWRITE));
g_type_class_add_private (gobject_class, sizeof (GtkRulerPrivate));
}
static void
gtk_ruler_init (GtkRuler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkRulerPrivate *private = GTK_RULER_GET_PRIVATE (ruler);
private->orientation = GTK_ORIENTATION_HORIZONTAL;
widget->requisition.width = widget->style->xthickness * 2 + 1;
widget->requisition.height = widget->style->ythickness * 2 + RULER_WIDTH;
ruler->backing_store = NULL;
ruler->xsrc = 0;
ruler->ysrc = 0;
@ -162,9 +210,14 @@ gtk_ruler_set_property (GObject *object,
GParamSpec *pspec)
{
GtkRuler *ruler = GTK_RULER (object);
GtkRulerPrivate *private = GTK_RULER_GET_PRIVATE (ruler);
switch (prop_id)
{
case PROP_ORIENTATION:
private->orientation = g_value_get_enum (value);
gtk_widget_queue_resize (GTK_WIDGET (ruler));
break;
case PROP_LOWER:
gtk_ruler_set_range (ruler, g_value_get_double (value), ruler->upper,
ruler->position, ruler->max_size);
@ -197,9 +250,13 @@ gtk_ruler_get_property (GObject *object,
GParamSpec *pspec)
{
GtkRuler *ruler = GTK_RULER (object);
GtkRulerPrivate *private = GTK_RULER_GET_PRIVATE (ruler);
switch (prop_id)
{
case PROP_ORIENTATION:
g_value_set_enum (value, private->orientation);
break;
case PROP_LOWER:
g_value_set_double (value, ruler->lower);
break;
@ -221,6 +278,24 @@ gtk_ruler_get_property (GObject *object,
}
}
/**
* gtk_ruler_new:
* @orientation: the ruler's orientation.
*
* Creates a new #GtkRuler with the given orientation.
*
* Return value: a new #GtkRuler.
*
* Since: 2.16
**/
GtkWidget *
gtk_ruler_new (GtkOrientation orientation)
{
return g_object_new (GTK_TYPE_RULER,
"orientation", orientation,
NULL);
}
void
gtk_ruler_set_metric (GtkRuler *ruler,
GtkMetricType metric)
@ -410,6 +485,24 @@ gtk_ruler_unrealize (GtkWidget *widget)
GTK_WIDGET_CLASS (gtk_ruler_parent_class)->unrealize (widget);
}
static void
gtk_ruler_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkRulerPrivate *private = GTK_RULER_GET_PRIVATE (widget);
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
{
requisition->width = widget->style->xthickness * 2 + 1;
requisition->height = widget->style->ythickness * 2 + RULER_WIDTH;
}
else
{
requisition->width = widget->style->xthickness * 2 + RULER_WIDTH;
requisition->height = widget->style->ythickness * 2 + 1;
}
}
static void
gtk_ruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
@ -428,15 +521,40 @@ gtk_ruler_size_allocate (GtkWidget *widget,
}
}
static gint
static gboolean
gtk_ruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
GtkRuler *ruler = GTK_RULER (widget);
GtkRulerPrivate *private = GTK_RULER_GET_PRIVATE (widget);
gint x;
gint y;
gdk_event_request_motions (event);
x = event->x;
y = event->y;
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * x) / widget->allocation.width;
else
ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * y) / widget->allocation.height;
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 gboolean
gtk_ruler_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkRuler *ruler;
if (GTK_WIDGET_DRAWABLE (widget))
{
ruler = GTK_RULER (widget);
GtkRuler *ruler = GTK_RULER (widget);
gtk_ruler_draw_ticks (ruler);
@ -487,5 +605,308 @@ gtk_ruler_make_pixmap (GtkRuler *ruler)
}
}
static void
gtk_ruler_real_draw_ticks (GtkRuler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkRulerPrivate *private = GTK_RULER_GET_PRIVATE (ruler);
cairo_t *cr;
gint i, j;
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 text_height;
gint pos;
PangoLayout *layout;
PangoRectangle logical_rect, ink_rect;
if (!GTK_WIDGET_DRAWABLE (ruler))
return;
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;
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
{
width = widget->allocation.width;
height = widget->allocation.height - ythickness * 2;
}
else
{
width = widget->allocation.height;
height = widget->allocation.width - ythickness * 2;
}
#define DETAILE(private) (private->orientation == GTK_ORIENTATION_HORIZONTAL ? "hruler" : "vruler");
gtk_paint_box (widget->style, ruler->backing_store,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
NULL, widget,
private->orientation == GTK_ORIENTATION_HORIZONTAL ?
"hruler" : "vruler",
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]);
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
xthickness,
height + ythickness,
widget->allocation.width - 2 * xthickness,
1);
}
else
{
cairo_rectangle (cr,
height + xthickness,
ythickness,
1,
widget->allocation.height - 2 * ythickness);
}
upper = ruler->upper / ruler->metric->pixels_per_unit;
lower = ruler->lower / ruler->metric->pixels_per_unit;
if ((upper - lower) == 0)
goto out;
increment = (gdouble) width / (upper - lower);
/* determine the scale H
* 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
*/
/* determine the scale V
* use the maximum extents of the ruler to determine the largest
* possible number to be displayed. Calculate the height in pixels
* of this displayed text. Use this height to find a scale which
* leaves sufficient room for drawing the ruler.
*/
scale = ceil (ruler->max_size / ruler->metric->pixels_per_unit);
g_snprintf (unit_str, sizeof (unit_str), "%d", scale);
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
{
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;
}
else
{
text_height = strlen (unit_str) * digit_height + 1;
for (scale = 0; scale < MAXIMUM_SCALES; scale++)
if (ruler->metric->ruler_scale[scale] * fabs(increment) > 2 * text_height)
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);
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_rectangle (cr,
pos, height + ythickness - length,
1, length);
}
else
{
cairo_rectangle (cr,
height + xthickness - length, pos,
length, 1);
}
/* draw label */
if (i == 0)
{
g_snprintf (unit_str, sizeof (unit_str), "%d", (int) cur);
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
{
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);
}
else
{
for (j = 0; j < (int) strlen (unit_str); j++)
{
pango_layout_set_text (layout, unit_str + j, 1);
pango_layout_get_extents (layout, NULL, &logical_rect);
gtk_paint_layout (widget->style,
ruler->backing_store,
GTK_WIDGET_STATE (widget),
FALSE,
NULL,
widget,
"vruler",
xthickness + 1,
pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset),
layout);
}
}
}
}
}
cairo_fill (cr);
out:
cairo_destroy (cr);
g_object_unref (layout);
}
static void
gtk_ruler_real_draw_pos (GtkRuler *ruler)
{
GtkWidget *widget = GTK_WIDGET (ruler);
GtkRulerPrivate *private = GTK_RULER_GET_PRIVATE (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;
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
{
height -= ythickness * 2;
bs_width = height / 2 + 2;
bs_width |= 1; /* make sure it's odd */
bs_height = bs_width / 2 + 1;
}
else
{
width -= xthickness * 2;
bs_height = width / 2 + 2;
bs_height |= 1; /* make sure it's odd */
bs_width = bs_height / 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);
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
{
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;
}
else
{
increment = (gdouble) height / (ruler->upper - ruler->lower);
x = (width + bs_width) / 2 + xthickness;
y = ROUND ((ruler->position - ruler->lower) * increment) + (ythickness - bs_height) / 2 - 1;
}
gdk_cairo_set_source_color (cr, &widget->style->fg[widget->state]);
cairo_move_to (cr, x, y);
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
{
cairo_line_to (cr, x + bs_width / 2.0, y + bs_height);
cairo_line_to (cr, x + bs_width, y);
}
else
{
cairo_line_to (cr, x + bs_width, y + bs_height / 2.0);
cairo_line_to (cr, x, y + bs_height);
}
cairo_fill (cr);
cairo_destroy (cr);
ruler->xsrc = x;
ruler->ysrc = y;
}
}
}
#define __GTK_RULER_C__
#include "gtkaliasdef.c"

34
gtk/gtkruler.h
View File

@ -110,23 +110,25 @@ struct _GtkRulerMetric
};
GType gtk_ruler_get_type (void) G_GNUC_CONST;
void gtk_ruler_set_metric (GtkRuler *ruler,
GtkMetricType metric);
void gtk_ruler_set_range (GtkRuler *ruler,
gdouble lower,
gdouble upper,
gdouble position,
gdouble max_size);
void gtk_ruler_draw_ticks (GtkRuler *ruler);
void gtk_ruler_draw_pos (GtkRuler *ruler);
GType gtk_ruler_get_type (void) G_GNUC_CONST;
GtkWidget * gtk_ruler_new (GtkOrientation orientation);
GtkMetricType gtk_ruler_get_metric (GtkRuler *ruler);
void gtk_ruler_get_range (GtkRuler *ruler,
gdouble *lower,
gdouble *upper,
gdouble *position,
gdouble *max_size);
void gtk_ruler_set_metric (GtkRuler *ruler,
GtkMetricType metric);
GtkMetricType gtk_ruler_get_metric (GtkRuler *ruler);
void gtk_ruler_set_range (GtkRuler *ruler,
gdouble lower,
gdouble upper,
gdouble position,
gdouble max_size);
void gtk_ruler_get_range (GtkRuler *ruler,
gdouble *lower,
gdouble *upper,
gdouble *position,
gdouble *max_size);
void gtk_ruler_draw_ticks (GtkRuler *ruler);
void gtk_ruler_draw_pos (GtkRuler *ruler);
G_END_DECLS

269
gtk/gtkvruler.c
View File

@ -21,291 +21,34 @@
* 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 <string.h>
#include "gtkorientable.h"
#include "gtkvruler.h"
#include "gtkintl.h"
#include "gtkalias.h"
#include <glib/gprintf.h>
#define RULER_WIDTH 14
#define MINIMUM_INCR 5
#define MAXIMUM_SUBDIVIDE 5
#define MAXIMUM_SCALES 10
#define ROUND(x) ((int) ((x) + 0.5))
static gint gtk_vruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event);
static void gtk_vruler_draw_ticks (GtkRuler *ruler);
static void gtk_vruler_draw_pos (GtkRuler *ruler);
G_DEFINE_TYPE (GtkVRuler, gtk_vruler, GTK_TYPE_RULER)
static void
gtk_vruler_class_init (GtkVRulerClass *klass)
{
GtkWidgetClass *widget_class;
GtkRulerClass *ruler_class;
widget_class = (GtkWidgetClass*) klass;
ruler_class = (GtkRulerClass*) klass;
widget_class->motion_notify_event = gtk_vruler_motion_notify;
ruler_class->draw_ticks = gtk_vruler_draw_ticks;
ruler_class->draw_pos = gtk_vruler_draw_pos;
}
static void
gtk_vruler_init (GtkVRuler *vruler)
{
GtkWidget *widget;
widget = GTK_WIDGET (vruler);
widget->requisition.width = widget->style->xthickness * 2 + RULER_WIDTH;
widget->requisition.height = widget->style->ythickness * 2 + 1;
gtk_orientable_set_orientation (GTK_ORIENTABLE (vruler),
GTK_ORIENTATION_VERTICAL);
}
GtkWidget*
GtkWidget *
gtk_vruler_new (void)
{
return g_object_new (GTK_TYPE_VRULER, NULL);
}
static gint
gtk_vruler_motion_notify (GtkWidget *widget,
GdkEventMotion *event)
{
GtkRuler *ruler;
gint y;
ruler = GTK_RULER (widget);
gdk_event_request_motions (event);
y = event->y;
ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * y) / widget->allocation.height;
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_vruler_draw_ticks (GtkRuler *ruler)
{
GtkWidget *widget;
cairo_t *cr;
gint i, j;
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_height;
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.height;
height = widget->allocation.width - ythickness * 2;
gtk_paint_box (widget->style, ruler->backing_store,
GTK_STATE_NORMAL, GTK_SHADOW_OUT,
NULL, widget, "vruler",
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,
height + xthickness,
ythickness,
1,
widget->allocation.height - 2 * ythickness);
upper = ruler->upper / ruler->metric->pixels_per_unit;
lower = ruler->lower / ruler->metric->pixels_per_unit;
if ((upper - lower) == 0)
goto out;
increment = (gdouble) width / (upper - lower);
/* determine the scale
* use the maximum extents of the ruler to determine the largest
* possible number to be displayed. Calculate the height in pixels
* of this displayed text. Use this height to find a scale which
* leaves sufficient room for drawing the ruler.
*/
scale = ceil (ruler->max_size / ruler->metric->pixels_per_unit);
g_snprintf (unit_str, sizeof (unit_str), "%d", scale);
text_height = strlen (unit_str) * digit_height + 1;
for (scale = 0; scale < MAXIMUM_SCALES; scale++)
if (ruler->metric->ruler_scale[scale] * fabs(increment) > 2 * text_height)
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,
height + xthickness - length, pos,
length, 1);
/* draw label */
if (i == 0)
{
g_snprintf (unit_str, sizeof (unit_str), "%d", (int) cur);
for (j = 0; j < (int) strlen (unit_str); j++)
{
pango_layout_set_text (layout, unit_str + j, 1);
pango_layout_get_extents (layout, NULL, &logical_rect);
gtk_paint_layout (widget->style,
ruler->backing_store,
GTK_WIDGET_STATE (widget),
FALSE,
NULL,
widget,
"vruler",
xthickness + 1,
pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset),
layout);
}
}
}
}
cairo_fill (cr);
out:
cairo_destroy (cr);
g_object_unref (layout);
}
static void
gtk_vruler_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 - xthickness * 2;
height = widget->allocation.height;
bs_height = width / 2 + 2;
bs_height |= 1; /* make sure it's odd */
bs_width = bs_height / 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) height / (ruler->upper - ruler->lower);
x = (width + bs_width) / 2 + xthickness;
y = ROUND ((ruler->position - ruler->lower) * increment) + (ythickness - bs_height) / 2 - 1;
gdk_cairo_set_source_color (cr, &widget->style->fg[widget->state]);
cairo_move_to (cr, x, y);
cairo_line_to (cr, x + bs_width, y + bs_height / 2.);
cairo_line_to (cr, x, y + bs_height);
cairo_fill (cr);
cairo_destroy (cr);
ruler->xsrc = x;
ruler->ysrc = y;
}
}
}
#define __GTK_VRULER_C__
#include "gtkaliasdef.c"