* 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 Library General Public
+ * 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
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
+ * 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.
*/
-#include "gtkruler.h"
+/*
+ * 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"
-static void gtk_ruler_class_init (GtkRulerClass *klass);
-static void gtk_ruler_init (GtkRuler *ruler);
-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);
+#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
-static GtkWidgetClass *parent_class;
+#define ROUND(x) ((int) ((x) + 0.5))
-static GtkRulerMetric ruler_metrics[] =
+struct _GtkRulerPrivate
{
- {"Pixels", "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 }},
+ 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
};
-guint
-gtk_ruler_get_type (void)
+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_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[] =
{
- static guint ruler_type = 0;
+ { "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 }},
+};
- if (!ruler_type)
- {
- GtkTypeInfo ruler_info =
- {
- "GtkRuler",
- sizeof (GtkRuler),
- sizeof (GtkRulerClass),
- (GtkClassInitFunc) gtk_ruler_class_init,
- (GtkObjectInitFunc) gtk_ruler_init,
- /* reserved_1 */ NULL,
- /* reserved_2 */ NULL,
- (GtkClassInitFunc) NULL,
- };
-
- ruler_type = gtk_type_unique (gtk_widget_get_type (), &ruler_info);
- }
- return ruler_type;
-}
+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)
{
- GtkObjectClass *object_class;
- GtkWidgetClass *widget_class;
+ GObjectClass *gobject_class = G_OBJECT_CLASS (class);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
- object_class = (GtkObjectClass*) class;
- widget_class = (GtkWidgetClass*) class;
-
- parent_class = gtk_type_class (gtk_widget_get_type ());
+ 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->expose_event = gtk_ruler_expose;
-
- class->draw_ticks = NULL;
- class->draw_pos = NULL;
+ 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)
{
- ruler->backing_store = NULL;
- ruler->non_gr_exp_gc = NULL;
- ruler->xsrc = 0;
- ruler->ysrc = 0;
- ruler->slider_size = 0;
- ruler->lower = 0;
- ruler->upper = 0;
- ruler->position = 0;
- ruler->max_size = 0;
+ 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)
{
- g_return_if_fail (ruler != NULL);
+ GtkRulerPrivate *priv;
+
g_return_if_fail (GTK_IS_RULER (ruler));
- ruler->metric = &ruler_metrics[metric];
+ 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);
- if (GTK_WIDGET_DRAWABLE (ruler))
- gtk_widget_queue_draw (GTK_WIDGET (ruler));
+ 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,
- gfloat lower,
- gfloat upper,
- gfloat position,
- gfloat max_size)
+ gdouble lower,
+ gdouble upper,
+ gdouble position,
+ gdouble max_size)
{
- g_return_if_fail (ruler != NULL);
+ GtkRulerPrivate *priv;
+
g_return_if_fail (GTK_IS_RULER (ruler));
- ruler->lower = lower;
- ruler->upper = upper;
- ruler->position = position;
- ruler->max_size = max_size;
+ priv = ruler->priv;
- if (GTK_WIDGET_DRAWABLE (ruler))
- gtk_widget_queue_draw (GTK_WIDGET (ruler));
+ 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_draw_ticks (GtkRuler *ruler)
+gtk_ruler_get_range (GtkRuler *ruler,
+ gdouble *lower,
+ gdouble *upper,
+ gdouble *position,
+ gdouble *max_size)
{
- g_return_if_fail (ruler != NULL);
+ GtkRulerPrivate *priv;
+
g_return_if_fail (GTK_IS_RULER (ruler));
- if (GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_ticks)
- (* GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_ticks) (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;
}
-void
-gtk_ruler_draw_pos (GtkRuler *ruler)
+static void
+gtk_ruler_draw_ticks (GtkRuler *ruler)
{
- g_return_if_fail (ruler != NULL);
+ GtkRulerPrivate *priv = ruler->priv;
+ cairo_t *cr;
+
g_return_if_fail (GTK_IS_RULER (ruler));
- if (GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_pos)
- (* GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_pos) (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;
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_RULER (widget));
-
ruler = GTK_RULER (widget);
- GTK_WIDGET_SET_FLAGS (ruler, GTK_REALIZED);
+
+ gtk_widget_set_realized (widget, TRUE);
+
+ gtk_widget_get_allocation (widget, &allocation);
attributes.window_type = GDK_WINDOW_CHILD;
- attributes.x = widget->allocation.x;
- attributes.y = widget->allocation.y;
- attributes.width = widget->allocation.width;
- attributes.height = widget->allocation.height;
+ 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.colormap = gtk_widget_get_colormap (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 | GDK_WA_COLORMAP;
+ attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
- widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
- gdk_window_set_user_data (widget->window, ruler);
+ 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);
- widget->style = gtk_style_attach (widget->style, widget->window);
- gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
+ 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;
+ GtkRuler *ruler = GTK_RULER (widget);
+ GtkRulerPrivate *priv = ruler->priv;
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_RULER (widget));
+ if (priv->backing_store)
+ {
+ cairo_surface_destroy (priv->backing_store);
+ priv->backing_store = NULL;
+ }
- ruler = GTK_RULER (widget);
+ GTK_WIDGET_CLASS (gtk_ruler_parent_class)->unrealize (widget);
+}
- if (ruler->backing_store)
- gdk_pixmap_unref (ruler->backing_store);
- if (ruler->non_gr_exp_gc)
- gdk_gc_destroy (ruler->non_gr_exp_gc);
+static void
+gtk_ruler_size_request (GtkWidget *widget,
+ GtkRequisition *requisition)
+{
+ GtkRuler *ruler = GTK_RULER (widget);
+ GtkRulerPrivate *priv = ruler->priv;
+ GtkStyle *style;
- ruler->backing_store = NULL;
- ruler->non_gr_exp_gc = NULL;
+ style = gtk_widget_get_style (widget);
- if (GTK_WIDGET_CLASS (parent_class)->unrealize)
- (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
+ if (priv->orientation == GTK_ORIENTATION_HORIZONTAL)
+ {
+ requisition->width = style->xthickness * 2 + 1;
+ requisition->height = style->ythickness * 2 + RULER_WIDTH;
+ }
+ else
+ {
+ requisition->width = style->xthickness * 2 + RULER_WIDTH;
+ requisition->height = style->ythickness * 2 + 1;
+ }
}
static void
gtk_ruler_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
- GtkRuler *ruler;
+ GtkRuler *ruler = GTK_RULER (widget);
+ GtkAllocation old_allocation;
+ gboolean resized;
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_RULER (widget));
+ gtk_widget_get_allocation (widget, &old_allocation);
+ resized = (old_allocation.width != allocation->width ||
+ old_allocation.height != allocation->height);
- ruler = GTK_RULER (widget);
- widget->allocation = *allocation;
+ gtk_widget_set_allocation (widget, allocation);
- if (GTK_WIDGET_REALIZED (widget))
+ if (gtk_widget_get_realized (widget))
{
- gdk_window_move_resize (widget->window,
+ gdk_window_move_resize (gtk_widget_get_window (widget),
allocation->x, allocation->y,
allocation->width, allocation->height);
- gtk_ruler_make_pixmap (ruler);
+ if (resized)
+ gtk_ruler_make_pixmap (ruler);
}
}
-static gint
-gtk_ruler_expose (GtkWidget *widget,
- GdkEventExpose *event)
+static gboolean
+gtk_ruler_motion_notify (GtkWidget *widget,
+ GdkEventMotion *event)
{
- GtkRuler *ruler;
+ GtkAllocation allocation;
+ GtkRuler *ruler = GTK_RULER (widget);
+ GtkRulerPrivate *priv = ruler->priv;
+ gint x;
+ gint y;
- g_return_val_if_fail (widget != NULL, FALSE);
- g_return_val_if_fail (GTK_IS_RULER (widget), FALSE);
- g_return_val_if_fail (event != NULL, FALSE);
+ gdk_event_request_motions (event);
+ x = event->x;
+ y = event->y;
- if (GTK_WIDGET_DRAWABLE (widget))
- {
- ruler = GTK_RULER (widget);
-
- gtk_paint_box (widget->style, widget->window,
- GTK_STATE_NORMAL, GTK_SHADOW_OUT,
- NULL, widget, "ruler",
- 0, 0, -1, -1);
-
- gtk_ruler_draw_ticks (ruler);
-
- gdk_draw_pixmap (widget->window,
- ruler->non_gr_exp_gc,
- ruler->backing_store,
- 0, 0, 0, 0,
- widget->allocation.width,
- widget->allocation.height);
-
- gtk_ruler_draw_pos (ruler);
- }
+ 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;
- gint width;
- gint height;
widget = GTK_WIDGET (ruler);
- if (ruler->backing_store)
+ 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
{
- gdk_window_get_size (ruler->backing_store, &width, &height);
- if ((width == widget->allocation.width) &&
- (height == widget->allocation.height))
- return;
+ text_height = strlen (unit_str) * digit_height + 1;
- gdk_pixmap_unref (ruler->backing_store);
+ for (scale = 0; scale < MAXIMUM_SCALES; scale++)
+ if (priv->metric->ruler_scale[scale] * fabs(increment) > 2 * text_height)
+ break;
}
- ruler->backing_store = gdk_pixmap_new (widget->window,
- widget->allocation.width,
- widget->allocation.height,
- -1);
+ if (scale == MAXIMUM_SCALES)
+ scale = MAXIMUM_SCALES - 1;
- ruler->xsrc = 0;
- ruler->ysrc = 0;
+ /* 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 (!ruler->non_gr_exp_gc)
+ if ((bs_width > 0) && (bs_height > 0))
{
- ruler->non_gr_exp_gc = gdk_gc_new (widget->window);
- gdk_gc_set_exposures (ruler->non_gr_exp_gc, FALSE);
+ 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 / ~andy / gtk / blobdiff