+++ /dev/null
-/* GTK - The GIMP Toolkit
- * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-/*
- * 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/.
- */
-
-#include "config.h"
-
-#include <math.h>
-#include <string.h>
-
-#include "gtkorientable.h"
-#include "gtkruler.h"
-#include "gtktypeutils.h"
-#include "gtkprivate.h"
-#include "gtkintl.h"
-
-#define RULER_WIDTH 14
-#define MINIMUM_INCR 5
-#define MAXIMUM_SUBDIVIDE 5
-#define MAXIMUM_SCALES 10
-
-#define ROUND(x) ((int) ((x) + 0.5))
-
-struct _GtkRulerPrivate
-{
- GtkOrientation orientation;
- GtkRulerMetric *metric;
-
- cairo_surface_t *backing_store;
-
- gint slider_size;
- gint xsrc;
- gint ysrc;
-
- gdouble lower; /* The upper limit of the ruler (in points) */
- gdouble max_size; /* The maximum size of the ruler */
- gdouble position; /* The position of the mark on the ruler */
- gdouble upper; /* The lower limit of the ruler */
-};
-
-enum {
- PROP_0,
- PROP_ORIENTATION,
- PROP_LOWER,
- PROP_UPPER,
- PROP_POSITION,
- PROP_MAX_SIZE,
- PROP_METRIC
-};
-
-
-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_get_preferred_width
- (GtkWidget *widget,
- gint *minimum,
- gint *natural);
-static void gtk_ruler_get_preferred_height
- (GtkWidget *widget,
- gint *minimum,
- gint *natural);
-static void gtk_ruler_size_allocate (GtkWidget *widget,
- GtkAllocation *allocation);
-static gboolean gtk_ruler_motion_notify (GtkWidget *widget,
- GdkEventMotion *event);
-static gboolean gtk_ruler_draw (GtkWidget *widget,
- cairo_t *cr);
-static void gtk_ruler_make_pixmap (GtkRuler *ruler);
-static void gtk_ruler_draw_ticks (GtkRuler *ruler);
-static void gtk_ruler_real_draw_ticks (GtkRuler *ruler,
- cairo_t *cr);
-static void gtk_ruler_real_draw_pos (GtkRuler *ruler,
- cairo_t *cr);
-
-
-static const GtkRulerMetric ruler_metrics[] =
-{
- { "Pixel", "Pi", 1.0, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
- { "Inches", "In", 72.0, { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }, { 1, 2, 4, 8, 16 }},
- { "Centimeters", "Cn", 28.35, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
-};
-
-
-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 = 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->get_preferred_width = gtk_ruler_get_preferred_width;
- widget_class->get_preferred_height = gtk_ruler_get_preferred_height;
- widget_class->size_allocate = gtk_ruler_size_allocate;
- widget_class->motion_notify_event = gtk_ruler_motion_notify;
- widget_class->draw = gtk_ruler_draw;
-
- 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,
- g_param_spec_double ("lower",
- P_("Lower"),
- P_("Lower limit of ruler"),
- -G_MAXDOUBLE,
- G_MAXDOUBLE,
- 0.0,
- GTK_PARAM_READWRITE));
-
- g_object_class_install_property (gobject_class,
- PROP_UPPER,
- g_param_spec_double ("upper",
- P_("Upper"),
- P_("Upper limit of ruler"),
- -G_MAXDOUBLE,
- G_MAXDOUBLE,
- 0.0,
- GTK_PARAM_READWRITE));
-
- g_object_class_install_property (gobject_class,
- PROP_POSITION,
- g_param_spec_double ("position",
- P_("Position"),
- P_("Position of mark on the ruler"),
- -G_MAXDOUBLE,
- G_MAXDOUBLE,
- 0.0,
- GTK_PARAM_READWRITE));
-
- g_object_class_install_property (gobject_class,
- PROP_MAX_SIZE,
- g_param_spec_double ("max-size",
- P_("Max Size"),
- P_("Maximum size of the ruler"),
- -G_MAXDOUBLE,
- G_MAXDOUBLE,
- 0.0,
- GTK_PARAM_READWRITE));
- /**
- * GtkRuler:metric:
- *
- * The metric used for the ruler.
- *
- * Since: 2.8
- */
- g_object_class_install_property (gobject_class,
- PROP_METRIC,
- g_param_spec_enum ("metric",
- P_("Metric"),
- P_("The metric used for the ruler"),
- 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)
-{
- GtkRulerPrivate *priv;
-
- ruler->priv = G_TYPE_INSTANCE_GET_PRIVATE (ruler,
- GTK_TYPE_RULER,
- GtkRulerPrivate);
- priv = ruler->priv;
-
- priv->orientation = GTK_ORIENTATION_HORIZONTAL;
-
- priv->backing_store = NULL;
- priv->xsrc = 0;
- priv->ysrc = 0;
- priv->slider_size = 0;
- priv->lower = 0;
- priv->upper = 0;
- priv->position = 0;
- priv->max_size = 0;
-
- gtk_ruler_set_metric (ruler, GTK_PIXELS);
-}
-
-static void
-gtk_ruler_set_property (GObject *object,
- guint prop_id,
- const GValue *value,
- GParamSpec *pspec)
-{
- GtkRuler *ruler = GTK_RULER (object);
- GtkRulerPrivate *priv = ruler->priv;
-
- switch (prop_id)
- {
- case PROP_ORIENTATION:
- priv->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), priv->upper,
- priv->position, priv->max_size);
- break;
- case PROP_UPPER:
- gtk_ruler_set_range (ruler, priv->lower, g_value_get_double (value),
- priv->position, priv->max_size);
- break;
- case PROP_POSITION:
- gtk_ruler_set_range (ruler, priv->lower, priv->upper,
- g_value_get_double (value), priv->max_size);
- break;
- case PROP_MAX_SIZE:
- gtk_ruler_set_range (ruler, priv->lower, priv->upper,
- priv->position, g_value_get_double (value));
- break;
- case PROP_METRIC:
- gtk_ruler_set_metric (ruler, g_value_get_enum (value));
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-static void
-gtk_ruler_get_property (GObject *object,
- guint prop_id,
- GValue *value,
- GParamSpec *pspec)
-{
- GtkRuler *ruler = GTK_RULER (object);
- GtkRulerPrivate *priv = ruler->priv;
-
- switch (prop_id)
- {
- case PROP_ORIENTATION:
- g_value_set_enum (value, priv->orientation);
- break;
- case PROP_LOWER:
- g_value_set_double (value, priv->lower);
- break;
- case PROP_UPPER:
- g_value_set_double (value, priv->upper);
- break;
- case PROP_POSITION:
- g_value_set_double (value, priv->position);
- break;
- case PROP_MAX_SIZE:
- g_value_set_double (value, priv->max_size);
- break;
- case PROP_METRIC:
- g_value_set_enum (value, gtk_ruler_get_metric (ruler));
- break;
- default:
- G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
- break;
- }
-}
-
-/**
- * gtk_ruler_new:
- * @orientation: the ruler's orientation.
- *
- * Creates a new #GtkRuler with the given orientation.
- *
- * Return value: a new #GtkRuler.
- *
- * Since: 3.0
- **/
-GtkWidget *
-gtk_ruler_new (GtkOrientation orientation)
-{
- return g_object_new (GTK_TYPE_RULER,
- "orientation", orientation,
- NULL);
-}
-
-/**
- * gtk_ruler_invalidate_ticks:
- * @ruler: the ruler to invalidate
- *
- * For performance reasons, #GtkRuler keeps a backbuffer containing the
- * prerendered contents of the ticks. To cause a repaint this buffer,
- * call this function instead of gtk_widget_queue_draw().
- **/
-static void
-gtk_ruler_invalidate_ticks (GtkRuler *ruler)
-{
- g_return_if_fail (GTK_IS_RULER (ruler));
-
- if (ruler->priv->backing_store == NULL)
- return;
-
- gtk_ruler_draw_ticks (ruler);
- gtk_widget_queue_draw (GTK_WIDGET (ruler));
-}
-
-void
-gtk_ruler_set_metric (GtkRuler *ruler,
- GtkMetricType metric)
-{
- GtkRulerPrivate *priv;
-
- g_return_if_fail (GTK_IS_RULER (ruler));
-
- priv = ruler->priv;
-
- priv->metric = (GtkRulerMetric *) &ruler_metrics[metric];
-
- g_object_notify (G_OBJECT (ruler), "metric");
-
- gtk_ruler_invalidate_ticks (ruler);
-}
-
-/**
- * gtk_ruler_get_metric:
- * @ruler: a #GtkRuler
- *
- * Gets the units used for a #GtkRuler. See gtk_ruler_set_metric().
- *
- * Return value: the units currently used for @ruler
- **/
-GtkMetricType
-gtk_ruler_get_metric (GtkRuler *ruler)
-{
- GtkRulerPrivate *priv;
- gint i;
-
- g_return_val_if_fail (GTK_IS_RULER (ruler), 0);
-
- priv = ruler->priv;
-
- for (i = 0; i < G_N_ELEMENTS (ruler_metrics); i++)
- if (priv->metric == &ruler_metrics[i])
- return i;
-
- g_assert_not_reached ();
-
- return 0;
-}
-
-/**
- * gtk_ruler_set_range:
- * @ruler: the gtkruler
- * @lower: the lower limit of the ruler
- * @upper: the upper limit of the ruler
- * @position: the mark on the ruler
- * @max_size: the maximum size of the ruler used when calculating the space to
- * leave for the text
- *
- * This sets the range of the ruler.
- */
-void
-gtk_ruler_set_range (GtkRuler *ruler,
- gdouble lower,
- gdouble upper,
- gdouble position,
- gdouble max_size)
-{
- GtkRulerPrivate *priv;
-
- g_return_if_fail (GTK_IS_RULER (ruler));
-
- priv = ruler->priv;
-
- g_object_freeze_notify (G_OBJECT (ruler));
- if (priv->lower != lower)
- {
- priv->lower = lower;
- g_object_notify (G_OBJECT (ruler), "lower");
- }
- if (priv->upper != upper)
- {
- priv->upper = upper;
- g_object_notify (G_OBJECT (ruler), "upper");
- }
- if (priv->position != position)
- {
- priv->position = position;
- g_object_notify (G_OBJECT (ruler), "position");
- }
- if (priv->max_size != max_size)
- {
- priv->max_size = max_size;
- g_object_notify (G_OBJECT (ruler), "max-size");
- }
- g_object_thaw_notify (G_OBJECT (ruler));
-
- gtk_ruler_invalidate_ticks (ruler);
-}
-
-/**
- * gtk_ruler_get_range:
- * @ruler: a #GtkRuler
- * @lower: (allow-none): location to store lower limit of the ruler, or %NULL
- * @upper: (allow-none): location to store upper limit of the ruler, or %NULL
- * @position: (allow-none): location to store the current position of the mark on the ruler, or %NULL
- * @max_size: location to store the maximum size of the ruler used when calculating
- * the space to leave for the text, or %NULL.
- *
- * Retrieves values indicating the range and current position of a #GtkRuler.
- * See gtk_ruler_set_range().
- **/
-void
-gtk_ruler_get_range (GtkRuler *ruler,
- gdouble *lower,
- gdouble *upper,
- gdouble *position,
- gdouble *max_size)
-{
- GtkRulerPrivate *priv;
-
- g_return_if_fail (GTK_IS_RULER (ruler));
-
- priv = ruler->priv;
-
- if (lower)
- *lower = priv->lower;
- if (upper)
- *upper = priv->upper;
- if (position)
- *position = priv->position;
- if (max_size)
- *max_size = priv->max_size;
-}
-
-static void
-gtk_ruler_draw_ticks (GtkRuler *ruler)
-{
- GtkRulerPrivate *priv = ruler->priv;
- cairo_t *cr;
-
- g_return_if_fail (GTK_IS_RULER (ruler));
-
- if (priv->backing_store == NULL)
- return;
-
- cr = cairo_create (priv->backing_store);
-
- if (GTK_RULER_GET_CLASS (ruler)->draw_ticks)
- GTK_RULER_GET_CLASS (ruler)->draw_ticks (ruler, cr);
-
- cairo_destroy (cr);
-}
-
-static void
-gtk_ruler_realize (GtkWidget *widget)
-{
- GtkAllocation allocation;
- GtkRuler *ruler;
- GdkWindow *window;
- GdkWindowAttr attributes;
- gint attributes_mask;
-
- ruler = GTK_RULER (widget);
-
- gtk_widget_set_realized (widget, TRUE);
-
- gtk_widget_get_allocation (widget, &allocation);
-
- attributes.window_type = GDK_WINDOW_CHILD;
- attributes.x = allocation.x;
- attributes.y = allocation.y;
- attributes.width = allocation.width;
- attributes.height = allocation.height;
- attributes.wclass = GDK_INPUT_OUTPUT;
- attributes.visual = gtk_widget_get_visual (widget);
- attributes.event_mask = gtk_widget_get_events (widget);
- attributes.event_mask |= (GDK_EXPOSURE_MASK |
- GDK_POINTER_MOTION_MASK |
- GDK_POINTER_MOTION_HINT_MASK);
-
- attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
-
- window = gdk_window_new (gtk_widget_get_parent_window (widget),
- &attributes, attributes_mask);
- gtk_widget_set_window (widget, window);
- gdk_window_set_user_data (window, ruler);
-
- gtk_widget_style_attach (widget);
- gtk_style_set_background (gtk_widget_get_style (widget),
- window, GTK_STATE_ACTIVE);
-
- gtk_ruler_make_pixmap (ruler);
-}
-
-static void
-gtk_ruler_unrealize (GtkWidget *widget)
-{
- GtkRuler *ruler = GTK_RULER (widget);
- GtkRulerPrivate *priv = ruler->priv;
-
- if (priv->backing_store)
- {
- cairo_surface_destroy (priv->backing_store);
- priv->backing_store = NULL;
- }
-
- GTK_WIDGET_CLASS (gtk_ruler_parent_class)->unrealize (widget);
-}
-
-static void
-gtk_ruler_get_preferred_size (GtkWidget *widget,
- GtkOrientation orientation,
- gint *minimum,
- gint *natural)
-{
- GtkRuler *ruler = GTK_RULER (widget);
- GtkRulerPrivate *priv = ruler->priv;
- GtkStyle *style;
- gint thickness;
-
- style = gtk_widget_get_style (widget);
-
- if (orientation == GTK_ORIENTATION_HORIZONTAL)
- thickness = style->xthickness;
- else
- thickness = style->ythickness;
-
- if (priv->orientation == orientation)
- *minimum = *natural = thickness * 2 + 1;
- else
- *minimum = *natural = thickness * 2 + RULER_WIDTH;
-}
-
-static void
-gtk_ruler_get_preferred_width (GtkWidget *widget,
- gint *minimum,
- gint *natural)
-{
- gtk_ruler_get_preferred_size (widget, GTK_ORIENTATION_HORIZONTAL, minimum, natural);
-}
-
-static void
-gtk_ruler_get_preferred_height (GtkWidget *widget,
- gint *minimum,
- gint *natural)
-{
- gtk_ruler_get_preferred_size (widget, GTK_ORIENTATION_VERTICAL, minimum, natural);
-}
-
-static void
-gtk_ruler_size_allocate (GtkWidget *widget,
- GtkAllocation *allocation)
-{
- GtkRuler *ruler = GTK_RULER (widget);
- GtkAllocation old_allocation;
- gboolean resized;
-
- gtk_widget_get_allocation (widget, &old_allocation);
- resized = (old_allocation.width != allocation->width ||
- old_allocation.height != allocation->height);
-
- gtk_widget_set_allocation (widget, allocation);
-
- if (gtk_widget_get_realized (widget))
- {
- gdk_window_move_resize (gtk_widget_get_window (widget),
- allocation->x, allocation->y,
- allocation->width, allocation->height);
-
- if (resized)
- gtk_ruler_make_pixmap (ruler);
- }
-}
-
-static gboolean
-gtk_ruler_motion_notify (GtkWidget *widget,
- GdkEventMotion *event)
-{
- GtkAllocation allocation;
- GtkRuler *ruler = GTK_RULER (widget);
- GtkRulerPrivate *priv = ruler->priv;
- gint x;
- gint y;
-
- gdk_event_request_motions (event);
- x = event->x;
- y = event->y;
-
- gtk_widget_get_allocation (widget, &allocation);
- if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
- priv->position = priv->lower + ((priv->upper - priv->lower) * x) / allocation.width;
- else
- priv->position = priv->lower + ((priv->upper - priv->lower) * y) / allocation.height;
-
- g_object_notify (G_OBJECT (ruler), "position");
-
- gtk_widget_queue_draw (widget);
-
- return FALSE;
-}
-
-static gboolean
-gtk_ruler_draw (GtkWidget *widget,
- cairo_t *cr)
-{
- GtkRuler *ruler = GTK_RULER (widget);
- GtkRulerPrivate *priv = ruler->priv;
-
- cairo_set_source_surface (cr, priv->backing_store, 0, 0);
- cairo_paint (cr);
-
- if (GTK_RULER_GET_CLASS (ruler)->draw_pos)
- GTK_RULER_GET_CLASS (ruler)->draw_pos (ruler, cr);
-
- return FALSE;
-}
-
-static void
-gtk_ruler_make_pixmap (GtkRuler *ruler)
-{
- GtkRulerPrivate *priv = ruler->priv;
- GtkAllocation allocation;
- GtkWidget *widget;
-
- widget = GTK_WIDGET (ruler);
-
- gtk_widget_get_allocation (widget, &allocation);
-
- if (priv->backing_store)
- cairo_surface_destroy (priv->backing_store);
-
- priv->backing_store = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
- CAIRO_CONTENT_COLOR,
- allocation.width,
- allocation.height);
-
- priv->xsrc = 0;
- priv->ysrc = 0;
-
- gtk_ruler_draw_ticks (ruler);
-}
-
-static void
-gtk_ruler_real_draw_ticks (GtkRuler *ruler,
- cairo_t *cr)
-{
- GtkWidget *widget = GTK_WIDGET (ruler);
- GtkRulerPrivate *priv = ruler->priv;
- GtkStyle *style;
- gint i, j;
- gint w, h;
- 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;
-
- style = gtk_widget_get_style (widget);
-
- xthickness = style->xthickness;
- ythickness = 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;
-
- w = gtk_widget_get_allocated_width (widget);
- h = gtk_widget_get_allocated_height (widget);
-
- if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
- {
- width = w;
- height = h - ythickness * 2;
- }
- else
- {
- width = h;
- height = w - ythickness * 2;
- }
-
-#define DETAILE(private) (priv->orientation == GTK_ORIENTATION_HORIZONTAL ? "hruler" : "vruler");
-
- gdk_cairo_set_source_color (cr, &style->fg[gtk_widget_get_state (widget)]);
-
- gtk_paint_box (style, cr,
- GTK_STATE_NORMAL, GTK_SHADOW_OUT,
- widget,
- priv->orientation == GTK_ORIENTATION_HORIZONTAL ?
- "hruler" : "vruler",
- 0, 0,
- w, h);
-
- if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
- {
- cairo_rectangle (cr,
- xthickness,
- height + ythickness,
- w - 2 * xthickness,
- 1);
- }
- else
- {
- cairo_rectangle (cr,
- height + xthickness,
- ythickness,
- 1,
- h - 2 * ythickness);
- }
-
- upper = priv->upper / priv->metric->pixels_per_unit;
- lower = priv->lower / priv->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, 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 (priv->max_size / priv->metric->pixels_per_unit);
- g_snprintf (unit_str, sizeof (unit_str), "%d", scale);
-
- if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
- {
- text_width = strlen (unit_str) * digit_height + 1;
-
- for (scale = 0; scale < MAXIMUM_SCALES; scale++)
- if (priv->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 (priv->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) priv->metric->ruler_scale[scale] /
- (gdouble) priv->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 (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
- {
- cairo_rectangle (cr,
- pos, height + ythickness - length,
- 1, length);
- }
- else
- {
- cairo_rectangle (cr,
- height + xthickness - length, pos,
- length, 1);
- }
- cairo_fill (cr);
-
- /* draw label */
- if (i == 0)
- {
- g_snprintf (unit_str, sizeof (unit_str), "%d", (int) cur);
-
- if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
- {
- pango_layout_set_text (layout, unit_str, -1);
- pango_layout_get_extents (layout, &logical_rect, NULL);
-
- gtk_paint_layout (style,
- cr,
- gtk_widget_get_state (widget),
- FALSE,
- 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 (style,
- cr,
- gtk_widget_get_state (widget),
- FALSE,
- widget,
- "vruler",
- xthickness + 1,
- pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset),
- layout);
- }
- }
- }
- }
- }
-
- cairo_fill (cr);
-
-out:
- g_object_unref (layout);
-}
-
-static void
-gtk_ruler_real_draw_pos (GtkRuler *ruler,
- cairo_t *cr)
-{
- GtkWidget *widget = GTK_WIDGET (ruler);
- GtkRulerPrivate *priv = ruler->priv;
- GtkStyle *style;
- gint x, y, width, height;
- gint bs_width, bs_height;
- gint xthickness;
- gint ythickness;
- gdouble increment;
-
- style = gtk_widget_get_style (widget);
- xthickness = style->xthickness;
- ythickness = style->ythickness;
- width = gtk_widget_get_allocated_width (widget);
- height = gtk_widget_get_allocated_height (widget);
-
- if (priv->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))
- {
- if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
- {
- increment = (gdouble) width / (priv->upper - priv->lower);
-
- x = ROUND ((priv->position - priv->lower) * increment) + (xthickness - bs_width) / 2 - 1;
- y = (height + bs_height) / 2 + ythickness;
- }
- else
- {
- increment = (gdouble) height / (priv->upper - priv->lower);
-
- x = (width + bs_width) / 2 + xthickness;
- y = ROUND ((priv->position - priv->lower) * increment) + (ythickness - bs_height) / 2 - 1;
- }
-
- gdk_cairo_set_source_color (cr, &style->fg[gtk_widget_get_state (widget)]);
-
- cairo_move_to (cr, x, y);
-
- if (priv->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);
-
- priv->xsrc = x;
- priv->ysrc = y;
- }
-}
projects / gtk4.git / commitdiff