/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ * Copyright (C) 2001 Red Hat, Inc.
*
* 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 <math.h>
-#include "gtkcontainer.h"
-#include "gtkscale.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/.
+ */
-#define SCALE_CLASS(w) GTK_SCALE_CLASS (GTK_OBJECT (w)->klass)
+#include "config.h"
+#include <math.h>
+#include <stdlib.h>
-static void gtk_scale_class_init (GtkScaleClass *klass);
-static void gtk_scale_init (GtkScale *scale);
-static void gtk_scale_map (GtkWidget *widget);
-static void gtk_scale_unmap (GtkWidget *widget);
+#include "gdk/gdkkeysyms.h"
+#include "gtkscale.h"
+#include "gtkmarshalers.h"
+#include "gtkbindings.h"
+#include "gtkprivate.h"
+#include "gtkintl.h"
+#include "gtkalias.h"
-static void gtk_scale_draw_background (GtkRange *range);
+#define MAX_DIGITS (64) /* don't change this,
+ * a) you don't need to and
+ * b) you might cause buffer owerflows in
+ * unrelated code portions otherwise
+ */
-static GtkRangeClass *parent_class = NULL;
+#define GTK_SCALE_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), GTK_TYPE_SCALE, GtkScalePrivate))
+typedef struct _GtkScalePrivate GtkScalePrivate;
-GtkType
-gtk_scale_get_type (void)
+struct _GtkScalePrivate
{
- static GtkType scale_type = 0;
+ PangoLayout *layout;
+};
- if (!scale_type)
- {
- static const GtkTypeInfo scale_info =
- {
- "GtkScale",
- sizeof (GtkScale),
- sizeof (GtkScaleClass),
- (GtkClassInitFunc) gtk_scale_class_init,
- (GtkObjectInitFunc) gtk_scale_init,
- /* reserved_1 */ NULL,
- /* reserved_2 */ NULL,
- (GtkClassInitFunc) NULL,
- };
+enum {
+ PROP_0,
+ PROP_DIGITS,
+ PROP_DRAW_VALUE,
+ PROP_VALUE_POS
+};
- scale_type = gtk_type_unique (GTK_TYPE_RANGE, &scale_info);
- }
+enum {
+ FORMAT_VALUE,
+ LAST_SIGNAL
+};
+
+static guint signals[LAST_SIGNAL];
- return scale_type;
+static void gtk_scale_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gtk_scale_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gtk_scale_style_set (GtkWidget *widget,
+ GtkStyle *previous);
+static void gtk_scale_get_range_border (GtkRange *range,
+ GtkBorder *border);
+static void gtk_scale_finalize (GObject *object);
+static void gtk_scale_screen_changed (GtkWidget *widget,
+ GdkScreen *old_screen);
+static gboolean gtk_scale_expose (GtkWidget *widget,
+ GdkEventExpose *event);
+static void gtk_scale_real_get_layout_offsets (GtkScale *scale,
+ gint *x,
+ gint *y);
+
+G_DEFINE_TYPE (GtkScale, gtk_scale, GTK_TYPE_RANGE)
+
+static gboolean
+single_string_accumulator (GSignalInvocationHint *ihint,
+ GValue *return_accu,
+ const GValue *handler_return,
+ gpointer dummy)
+{
+ gboolean continue_emission;
+ const gchar *str;
+
+ str = g_value_get_string (handler_return);
+ g_value_set_string (return_accu, str);
+ continue_emission = str == NULL;
+
+ return continue_emission;
}
+
+#define add_slider_binding(binding_set, keyval, mask, scroll) \
+ gtk_binding_entry_add_signal (binding_set, keyval, mask, \
+ I_("move-slider"), 1, \
+ GTK_TYPE_SCROLL_TYPE, scroll)
+
static void
gtk_scale_class_init (GtkScaleClass *class)
{
- GtkObjectClass *object_class;
+ GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
- GtkRangeClass *range_class;
-
- object_class = (GtkObjectClass*) class;
+ GtkRangeClass *range_class;
+ GtkBindingSet *binding_set;
+
+ gobject_class = G_OBJECT_CLASS (class);
range_class = (GtkRangeClass*) class;
widget_class = (GtkWidgetClass*) class;
+
+ gobject_class->set_property = gtk_scale_set_property;
+ gobject_class->get_property = gtk_scale_get_property;
+ gobject_class->finalize = gtk_scale_finalize;
+
+ widget_class->style_set = gtk_scale_style_set;
+ widget_class->screen_changed = gtk_scale_screen_changed;
+ widget_class->expose_event = gtk_scale_expose;
+
+ range_class->slider_detail = "Xscale";
+ range_class->get_range_border = gtk_scale_get_range_border;
+
+ class->get_layout_offsets = gtk_scale_real_get_layout_offsets;
+
+ /**
+ * GtkScale::format-value:
+ * @scale: the object which received the signal
+ * @value: the value to format
+ *
+ * Signal which allows you to change how the scale value is displayed.
+ * Connect a signal handler which returns an allocated string representing
+ * @value. That string will then be used to display the scale's value.
+ *
+ * Here's an example signal handler which displays a value 1.0 as
+ * with "-->1.0<--".
+ * |[
+ * static gchar*
+ * format_value_callback (GtkScale *scale,
+ * gdouble value)
+ * {
+ * return g_strdup_printf ("-->%0.*g<--",
+ * gtk_scale_get_digits (scale), value);
+ * }
+ * ]|
+ *
+ * Return value: allocated string representing @value
+ */
+ signals[FORMAT_VALUE] =
+ g_signal_new (I_("format-value"),
+ G_TYPE_FROM_CLASS (gobject_class),
+ G_SIGNAL_RUN_LAST,
+ G_STRUCT_OFFSET (GtkScaleClass, format_value),
+ single_string_accumulator, NULL,
+ _gtk_marshal_STRING__DOUBLE,
+ G_TYPE_STRING, 1,
+ G_TYPE_DOUBLE);
+
+ g_object_class_install_property (gobject_class,
+ PROP_DIGITS,
+ g_param_spec_int ("digits",
+ P_("Digits"),
+ P_("The number of decimal places that are displayed in the value"),
+ -1,
+ MAX_DIGITS,
+ 1,
+ GTK_PARAM_READWRITE));
+
+ g_object_class_install_property (gobject_class,
+ PROP_DRAW_VALUE,
+ g_param_spec_boolean ("draw-value",
+ P_("Draw Value"),
+ P_("Whether the current value is displayed as a string next to the slider"),
+ TRUE,
+ GTK_PARAM_READWRITE));
+
+ g_object_class_install_property (gobject_class,
+ PROP_VALUE_POS,
+ g_param_spec_enum ("value-pos",
+ P_("Value Position"),
+ P_("The position in which the current value is displayed"),
+ GTK_TYPE_POSITION_TYPE,
+ GTK_POS_TOP,
+ GTK_PARAM_READWRITE));
+
+ gtk_widget_class_install_style_property (widget_class,
+ g_param_spec_int ("slider-length",
+ P_("Slider Length"),
+ P_("Length of scale's slider"),
+ 0,
+ G_MAXINT,
+ 31,
+ GTK_PARAM_READABLE));
+
+ gtk_widget_class_install_style_property (widget_class,
+ g_param_spec_int ("value-spacing",
+ P_("Value spacing"),
+ P_("Space between value text and the slider/trough area"),
+ 0,
+ G_MAXINT,
+ 2,
+ GTK_PARAM_READABLE));
+
+ /* All bindings (even arrow keys) are on both h/v scale, because
+ * blind users etc. don't care about scale orientation.
+ */
+
+ binding_set = gtk_binding_set_by_class (class);
+
+ add_slider_binding (binding_set, GDK_Left, 0,
+ GTK_SCROLL_STEP_LEFT);
+
+ add_slider_binding (binding_set, GDK_Left, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_LEFT);
+
+ add_slider_binding (binding_set, GDK_KP_Left, 0,
+ GTK_SCROLL_STEP_LEFT);
+
+ add_slider_binding (binding_set, GDK_KP_Left, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_LEFT);
+
+ add_slider_binding (binding_set, GDK_Right, 0,
+ GTK_SCROLL_STEP_RIGHT);
+
+ add_slider_binding (binding_set, GDK_Right, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_RIGHT);
+
+ add_slider_binding (binding_set, GDK_KP_Right, 0,
+ GTK_SCROLL_STEP_RIGHT);
+
+ add_slider_binding (binding_set, GDK_KP_Right, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_RIGHT);
+
+ add_slider_binding (binding_set, GDK_Up, 0,
+ GTK_SCROLL_STEP_UP);
- parent_class = gtk_type_class (GTK_TYPE_RANGE);
+ add_slider_binding (binding_set, GDK_Up, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_UP);
- widget_class->map = gtk_scale_map;
- widget_class->unmap = gtk_scale_unmap;
+ add_slider_binding (binding_set, GDK_KP_Up, 0,
+ GTK_SCROLL_STEP_UP);
- range_class->draw_background = gtk_scale_draw_background;
+ add_slider_binding (binding_set, GDK_KP_Up, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_UP);
- class->slider_length = 31;
- class->value_spacing = 2;
- class->draw_value = NULL;
+ add_slider_binding (binding_set, GDK_Down, 0,
+ GTK_SCROLL_STEP_DOWN);
+
+ add_slider_binding (binding_set, GDK_Down, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_DOWN);
+
+ add_slider_binding (binding_set, GDK_KP_Down, 0,
+ GTK_SCROLL_STEP_DOWN);
+
+ add_slider_binding (binding_set, GDK_KP_Down, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_DOWN);
+
+ add_slider_binding (binding_set, GDK_Page_Up, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_LEFT);
+
+ add_slider_binding (binding_set, GDK_KP_Page_Up, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_LEFT);
+
+ add_slider_binding (binding_set, GDK_Page_Up, 0,
+ GTK_SCROLL_PAGE_UP);
+
+ add_slider_binding (binding_set, GDK_KP_Page_Up, 0,
+ GTK_SCROLL_PAGE_UP);
+
+ add_slider_binding (binding_set, GDK_Page_Down, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_RIGHT);
+
+ add_slider_binding (binding_set, GDK_KP_Page_Down, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_RIGHT);
+
+ add_slider_binding (binding_set, GDK_Page_Down, 0,
+ GTK_SCROLL_PAGE_DOWN);
+
+ add_slider_binding (binding_set, GDK_KP_Page_Down, 0,
+ GTK_SCROLL_PAGE_DOWN);
+
+ /* Logical bindings (vs. visual bindings above) */
+
+ add_slider_binding (binding_set, GDK_plus, 0,
+ GTK_SCROLL_STEP_FORWARD);
+
+ add_slider_binding (binding_set, GDK_minus, 0,
+ GTK_SCROLL_STEP_BACKWARD);
+
+ add_slider_binding (binding_set, GDK_plus, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_FORWARD);
+
+ add_slider_binding (binding_set, GDK_minus, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_BACKWARD);
+
+
+ add_slider_binding (binding_set, GDK_KP_Add, 0,
+ GTK_SCROLL_STEP_FORWARD);
+
+ add_slider_binding (binding_set, GDK_KP_Subtract, 0,
+ GTK_SCROLL_STEP_BACKWARD);
+
+ add_slider_binding (binding_set, GDK_KP_Add, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_FORWARD);
+
+ add_slider_binding (binding_set, GDK_KP_Subtract, GDK_CONTROL_MASK,
+ GTK_SCROLL_PAGE_BACKWARD);
+
+
+ add_slider_binding (binding_set, GDK_Home, 0,
+ GTK_SCROLL_START);
+
+ add_slider_binding (binding_set, GDK_KP_Home, 0,
+ GTK_SCROLL_START);
+
+ add_slider_binding (binding_set, GDK_End, 0,
+ GTK_SCROLL_END);
+
+ add_slider_binding (binding_set, GDK_KP_End, 0,
+ GTK_SCROLL_END);
+
+ g_type_class_add_private (gobject_class, sizeof (GtkScalePrivate));
+}
+
+static void
+gtk_scale_orientation_notify (GtkRange *range,
+ const GParamSpec *pspec)
+{
+ range->flippable = (range->orientation == GTK_ORIENTATION_HORIZONTAL);
}
static void
gtk_scale_init (GtkScale *scale)
{
+ GtkRange *range = GTK_RANGE (scale);
+
GTK_WIDGET_SET_FLAGS (scale, GTK_CAN_FOCUS);
- GTK_WIDGET_SET_FLAGS (scale, GTK_NO_WINDOW);
- GTK_RANGE (scale)->digits = 1;
+
+ range->slider_size_fixed = TRUE;
+ range->has_stepper_a = FALSE;
+ range->has_stepper_b = FALSE;
+ range->has_stepper_c = FALSE;
+ range->has_stepper_d = FALSE;
+
scale->draw_value = TRUE;
scale->value_pos = GTK_POS_TOP;
+ scale->digits = 1;
+ range->round_digits = scale->digits;
+
+ gtk_scale_orientation_notify (range, NULL);
+ g_signal_connect (scale, "notify::orientation",
+ G_CALLBACK (gtk_scale_orientation_notify),
+ NULL);
}
static void
-gtk_scale_map (GtkWidget *widget)
+gtk_scale_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
{
- GtkRange *range;
+ GtkScale *scale;
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_SCALE (widget));
-
- GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
- range = GTK_RANGE (widget);
+ scale = GTK_SCALE (object);
- gdk_window_show (range->trough);
+ switch (prop_id)
+ {
+ case PROP_DIGITS:
+ gtk_scale_set_digits (scale, g_value_get_int (value));
+ break;
+ case PROP_DRAW_VALUE:
+ gtk_scale_set_draw_value (scale, g_value_get_boolean (value));
+ break;
+ case PROP_VALUE_POS:
+ gtk_scale_set_value_pos (scale, g_value_get_enum (value));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
}
static void
-gtk_scale_unmap (GtkWidget *widget)
+gtk_scale_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
{
- GtkRange *range;
+ GtkScale *scale;
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_SCALE (widget));
+ scale = GTK_SCALE (object);
- GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
- range = GTK_RANGE (widget);
+ switch (prop_id)
+ {
+ case PROP_DIGITS:
+ g_value_set_int (value, scale->digits);
+ break;
+ case PROP_DRAW_VALUE:
+ g_value_set_boolean (value, scale->draw_value);
+ break;
+ case PROP_VALUE_POS:
+ g_value_set_enum (value, scale->value_pos);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+/**
+ * gtk_scale_new:
+ * @orientation: the scale's orientation.
+ * @adjustment: the #GtkAdjustment which sets the range of the scale, or
+ * %NULL to create a new adjustment.
+ *
+ * Creates a new #GtkScale.
+ *
+ * Return value: a new #GtkScale
+ *
+ * Since: 2.16
+ **/
+GtkWidget *
+gtk_scale_new (GtkOrientation orientation,
+ GtkAdjustment *adjustment)
+{
+ g_return_val_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment),
+ NULL);
+
+ return g_object_new (GTK_TYPE_SCALE,
+ "orientation", orientation,
+ "adjustment", adjustment,
+ NULL);
+}
- if (GTK_WIDGET_NO_WINDOW (widget))
- gtk_widget_queue_clear (widget);
+/**
+ * gtk_scale_new_with_range:
+ * @orientation: the scale's orientation.
+ * @min: minimum value
+ * @max: maximum value
+ * @step: step increment (tick size) used with keyboard shortcuts
+ *
+ * Creates a new scale widget with the given orientation that lets the
+ * user input a number between @min and @max (including @min and @max)
+ * with the increment @step. @step must be nonzero; it's the distance
+ * the slider moves when using the arrow keys to adjust the scale
+ * value.
+ *
+ * Note that the way in which the precision is derived works best if @step
+ * is a power of ten. If the resulting precision is not suitable for your
+ * needs, use gtk_scale_set_digits() to correct it.
+ *
+ * Return value: a new #GtkScale
+ *
+ * Since: 2.16
+ **/
+GtkWidget *
+gtk_scale_new_with_range (GtkOrientation orientation,
+ gdouble min,
+ gdouble max,
+ gdouble step)
+{
+ GtkObject *adj;
+ gint digits;
+
+ g_return_val_if_fail (min < max, NULL);
+ g_return_val_if_fail (step != 0.0, NULL);
+
+ adj = gtk_adjustment_new (min, min, max, step, 10 * step, 0);
+
+ if (fabs (step) >= 1.0 || step == 0.0)
+ {
+ digits = 0;
+ }
+ else
+ {
+ digits = abs ((gint) floor (log10 (fabs (step))));
+ if (digits > 5)
+ digits = 5;
+ }
- gdk_window_hide (range->trough);
+ return g_object_new (GTK_TYPE_SCALE,
+ "orientation", orientation,
+ "adjustment", adj,
+ "digits", digits,
+ NULL);
}
+/**
+ * gtk_scale_set_digits:
+ * @scale: a #GtkScale
+ * @digits: the number of decimal places to display,
+ * e.g. use 1 to display 1.0, 2 to display 1.00, etc
+ *
+ * Sets the number of decimal places that are displayed in the value.
+ * Also causes the value of the adjustment to be rounded off to this
+ * number of digits, so the retrieved value matches the value the user saw.
+ */
void
gtk_scale_set_digits (GtkScale *scale,
gint digits)
{
- g_return_if_fail (scale != NULL);
+ GtkRange *range;
+
g_return_if_fail (GTK_IS_SCALE (scale));
- if (GTK_RANGE (scale)->digits != digits)
+ range = GTK_RANGE (scale);
+
+ digits = CLAMP (digits, -1, MAX_DIGITS);
+
+ if (scale->digits != digits)
{
- GTK_RANGE (scale)->digits = digits;
+ scale->digits = digits;
+ if (scale->draw_value)
+ range->round_digits = digits;
+
+ _gtk_scale_clear_layout (scale);
+ gtk_widget_queue_resize (GTK_WIDGET (scale));
- if (GTK_WIDGET_VISIBLE (scale) && GTK_WIDGET_MAPPED (scale))
- gtk_widget_queue_resize (GTK_WIDGET (scale));
+ g_object_notify (G_OBJECT (scale), "digits");
}
}
+/**
+ * gtk_scale_get_digits:
+ * @scale: a #GtkScale
+ *
+ * Gets the number of decimal places that are displayed in the value.
+ *
+ * Returns: the number of decimal places that are displayed
+ */
+gint
+gtk_scale_get_digits (GtkScale *scale)
+{
+ g_return_val_if_fail (GTK_IS_SCALE (scale), -1);
+
+ return scale->digits;
+}
+
+/**
+ * gtk_scale_set_draw_value:
+ * @scale: a #GtkScale
+ * @draw_value: %TRUE to draw the value
+ *
+ * Specifies whether the current value is displayed as a string next
+ * to the slider.
+ */
void
gtk_scale_set_draw_value (GtkScale *scale,
- gint draw_value)
+ gboolean draw_value)
{
- g_return_if_fail (scale != NULL);
g_return_if_fail (GTK_IS_SCALE (scale));
+ draw_value = draw_value != FALSE;
+
if (scale->draw_value != draw_value)
{
- scale->draw_value = (draw_value != 0);
+ scale->draw_value = draw_value;
+ if (draw_value)
+ GTK_RANGE (scale)->round_digits = scale->digits;
+ else
+ GTK_RANGE (scale)->round_digits = -1;
- if (GTK_WIDGET_VISIBLE (scale) && GTK_WIDGET_MAPPED (scale))
- gtk_widget_queue_resize (GTK_WIDGET (scale));
+ _gtk_scale_clear_layout (scale);
+
+ gtk_widget_queue_resize (GTK_WIDGET (scale));
+
+ g_object_notify (G_OBJECT (scale), "draw-value");
}
}
+/**
+ * gtk_scale_get_draw_value:
+ * @scale: a #GtkScale
+ *
+ * Returns whether the current value is displayed as a string
+ * next to the slider.
+ *
+ * Returns: whether the current value is displayed as a string
+ */
+gboolean
+gtk_scale_get_draw_value (GtkScale *scale)
+{
+ g_return_val_if_fail (GTK_IS_SCALE (scale), FALSE);
+
+ return scale->draw_value;
+}
+
+/**
+ * gtk_scale_set_value_pos:
+ * @scale: a #GtkScale
+ * @pos: the position in which the current value is displayed
+ *
+ * Sets the position in which the current value is displayed.
+ */
void
gtk_scale_set_value_pos (GtkScale *scale,
GtkPositionType pos)
{
- g_return_if_fail (scale != NULL);
g_return_if_fail (GTK_IS_SCALE (scale));
if (scale->value_pos != pos)
{
scale->value_pos = pos;
+ _gtk_scale_clear_layout (scale);
if (GTK_WIDGET_VISIBLE (scale) && GTK_WIDGET_MAPPED (scale))
gtk_widget_queue_resize (GTK_WIDGET (scale));
+
+ g_object_notify (G_OBJECT (scale), "value-pos");
}
}
-gint
-gtk_scale_get_value_width (GtkScale *scale)
+/**
+ * gtk_scale_get_value_pos:
+ * @scale: a #GtkScale
+ *
+ * Gets the position in which the current value is displayed.
+ *
+ * Returns: the position in which the current value is displayed
+ */
+GtkPositionType
+gtk_scale_get_value_pos (GtkScale *scale)
{
- GtkRange *range;
- gchar buffer[128];
- gfloat value;
- gint temp;
- gint return_val;
- gint digits;
- gint i, j;
-
- g_return_val_if_fail (scale != NULL, 0);
g_return_val_if_fail (GTK_IS_SCALE (scale), 0);
- return_val = 0;
+ return scale->value_pos;
+}
+
+static void
+gtk_scale_get_range_border (GtkRange *range,
+ GtkBorder *border)
+{
+ GtkWidget *widget;
+ GtkScale *scale;
+ gint w, h;
+
+ widget = GTK_WIDGET (range);
+ scale = GTK_SCALE (range);
+
+ _gtk_scale_get_value_size (scale, &w, &h);
+
+ border->left = 0;
+ border->right = 0;
+ border->top = 0;
+ border->bottom = 0;
+
if (scale->draw_value)
{
- range = GTK_RANGE (scale);
+ gint value_spacing;
+ gtk_widget_style_get (widget, "value-spacing", &value_spacing, NULL);
- value = ABS (range->adjustment->lower);
- if (value == 0) value = 1;
- digits = log10 (value) + 1;
- if (digits > 13)
- digits = 13;
-
- i = 0;
- if (range->adjustment->lower < 0)
- buffer[i++] = '-';
- for (j = 0; j < digits; j++)
- buffer[i++] = '0';
- if (GTK_RANGE (scale)->digits)
- buffer[i++] = '.';
- for (j = 0; j < GTK_RANGE (scale)->digits; j++)
- buffer[i++] = '0';
- buffer[i] = '\0';
-
- return_val = gdk_string_measure (GTK_WIDGET (scale)->style->font, buffer);
-
- value = ABS (range->adjustment->upper);
- if (value == 0) value = 1;
- digits = log10 (value) + 1;
- if (digits > 13)
- digits = 13;
-
- i = 0;
- if (range->adjustment->lower < 0)
- buffer[i++] = '-';
- for (j = 0; j < digits; j++)
- buffer[i++] = '0';
- if (GTK_RANGE (scale)->digits)
- buffer[i++] = '.';
- for (j = 0; j < GTK_RANGE (scale)->digits; j++)
- buffer[i++] = '0';
- buffer[i] = '\0';
-
- temp = gdk_string_measure (GTK_WIDGET (scale)->style->font, buffer);
- return_val = MAX (return_val, temp);
- }
-
- return return_val;
+ switch (scale->value_pos)
+ {
+ case GTK_POS_LEFT:
+ border->left += w + value_spacing;
+ break;
+ case GTK_POS_RIGHT:
+ border->right += w + value_spacing;
+ break;
+ case GTK_POS_TOP:
+ border->top += h + value_spacing;
+ break;
+ case GTK_POS_BOTTOM:
+ border->bottom += h + value_spacing;
+ break;
+ }
+ }
}
+/* FIXME this could actually be static at the moment. */
void
-gtk_scale_draw_value (GtkScale *scale)
+_gtk_scale_get_value_size (GtkScale *scale,
+ gint *width,
+ gint *height)
{
- g_return_if_fail (scale != NULL);
+ GtkRange *range;
+
g_return_if_fail (GTK_IS_SCALE (scale));
- if (SCALE_CLASS (scale)->draw_value)
- (* SCALE_CLASS (scale)->draw_value) (scale);
+ if (scale->draw_value)
+ {
+ PangoLayout *layout;
+ PangoRectangle logical_rect;
+ gchar *txt;
+
+ range = GTK_RANGE (scale);
+
+ layout = gtk_widget_create_pango_layout (GTK_WIDGET (scale), NULL);
+
+ txt = _gtk_scale_format_value (scale, range->adjustment->lower);
+ pango_layout_set_text (layout, txt, -1);
+ g_free (txt);
+
+ pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
+
+ if (width)
+ *width = logical_rect.width;
+ if (height)
+ *height = logical_rect.height;
+
+ txt = _gtk_scale_format_value (scale, range->adjustment->upper);
+ pango_layout_set_text (layout, txt, -1);
+ g_free (txt);
+
+ pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
+
+ if (width)
+ *width = MAX (*width, logical_rect.width);
+ if (height)
+ *height = MAX (*height, logical_rect.height);
+
+ g_object_unref (layout);
+ }
+ else
+ {
+ if (width)
+ *width = 0;
+ if (height)
+ *height = 0;
+ }
+
+}
+
+static void
+gtk_scale_style_set (GtkWidget *widget,
+ GtkStyle *previous)
+{
+ gint slider_length;
+ GtkRange *range;
+
+ range = GTK_RANGE (widget);
+
+ gtk_widget_style_get (widget,
+ "slider-length", &slider_length,
+ NULL);
+
+ range->min_slider_size = slider_length;
+
+ _gtk_scale_clear_layout (GTK_SCALE (widget));
+
+ GTK_WIDGET_CLASS (gtk_scale_parent_class)->style_set (widget, previous);
+}
+
+static void
+gtk_scale_screen_changed (GtkWidget *widget,
+ GdkScreen *old_screen)
+{
+ _gtk_scale_clear_layout (GTK_SCALE (widget));
+}
+
+static gboolean
+gtk_scale_expose (GtkWidget *widget,
+ GdkEventExpose *event)
+{
+ GtkScale *scale = GTK_SCALE (widget);
+
+ /* We need to chain up _first_ so the various geometry members of
+ * GtkRange struct are updated.
+ */
+ GTK_WIDGET_CLASS (gtk_scale_parent_class)->expose_event (widget, event);
+
+ if (scale->draw_value)
+ {
+ GtkRange *range = GTK_RANGE (scale);
+ PangoLayout *layout;
+ gint x, y;
+ GtkStateType state_type;
+
+ layout = gtk_scale_get_layout (scale);
+ gtk_scale_get_layout_offsets (scale, &x, &y);
+
+ state_type = GTK_STATE_NORMAL;
+ if (!GTK_WIDGET_IS_SENSITIVE (scale))
+ state_type = GTK_STATE_INSENSITIVE;
+
+ gtk_paint_layout (widget->style,
+ widget->window,
+ state_type,
+ FALSE,
+ NULL,
+ widget,
+ range->orientation == GTK_ORIENTATION_HORIZONTAL ?
+ "hscale" : "vscale",
+ x, y,
+ layout);
+
+ }
+
+ return FALSE;
+}
+
+static void
+gtk_scale_real_get_layout_offsets (GtkScale *scale,
+ gint *x,
+ gint *y)
+{
+ GtkWidget *widget = GTK_WIDGET (scale);
+ GtkRange *range = GTK_RANGE (widget);
+ PangoLayout *layout = gtk_scale_get_layout (scale);
+ PangoRectangle logical_rect;
+ gint value_spacing;
+
+ if (!layout)
+ {
+ *x = 0;
+ *y = 0;
+
+ return;
+ }
+
+ gtk_widget_style_get (widget, "value-spacing", &value_spacing, NULL);
+
+ pango_layout_get_pixel_extents (layout, NULL, &logical_rect);
+
+ if (range->orientation == GTK_ORIENTATION_HORIZONTAL)
+ {
+ switch (scale->value_pos)
+ {
+ case GTK_POS_LEFT:
+ *x = range->range_rect.x - value_spacing - logical_rect.width;
+ *y = range->range_rect.y + (range->range_rect.height - logical_rect.height) / 2;
+ break;
+
+ case GTK_POS_RIGHT:
+ *x = range->range_rect.x + range->range_rect.width + value_spacing;
+ *y = range->range_rect.y + (range->range_rect.height - logical_rect.height) / 2;
+ break;
+
+ case GTK_POS_TOP:
+ *x = range->slider_start +
+ (range->slider_end - range->slider_start - logical_rect.width) / 2;
+ *x = CLAMP (*x, 0, widget->allocation.width - logical_rect.width);
+ *y = range->range_rect.y - logical_rect.height - value_spacing;
+ break;
+
+ case GTK_POS_BOTTOM:
+ *x = range->slider_start +
+ (range->slider_end - range->slider_start - logical_rect.width) / 2;
+ *x = CLAMP (*x, 0, widget->allocation.width - logical_rect.width);
+ *y = range->range_rect.y + range->range_rect.height + value_spacing;
+ break;
+
+ default:
+ g_return_if_reached ();
+ break;
+ }
+ }
+ else
+ {
+ switch (scale->value_pos)
+ {
+ case GTK_POS_LEFT:
+ *x = range->range_rect.x - logical_rect.width - value_spacing;
+ *y = range->slider_start + (range->slider_end - range->slider_start - logical_rect.height) / 2;
+ *y = CLAMP (*y, 0, widget->allocation.height - logical_rect.height);
+ break;
+
+ case GTK_POS_RIGHT:
+ *x = range->range_rect.x + range->range_rect.width + value_spacing;
+ *y = range->slider_start + (range->slider_end - range->slider_start - logical_rect.height) / 2;
+ *y = CLAMP (*y, 0, widget->allocation.height - logical_rect.height);
+ break;
+
+ case GTK_POS_TOP:
+ *x = range->range_rect.x + (range->range_rect.width - logical_rect.width) / 2;
+ *y = range->range_rect.y - logical_rect.height - value_spacing;
+ break;
+
+ case GTK_POS_BOTTOM:
+ *x = range->range_rect.x + (range->range_rect.width - logical_rect.width) / 2;
+ *y = range->range_rect.y + range->range_rect.height + value_spacing;
+ break;
+
+ default:
+ g_return_if_reached ();
+ }
+ }
+
+ *x += widget->allocation.x;
+ *y += widget->allocation.y;
}
+/**
+ * _gtk_scale_format_value:
+ * @scale: a #GtkScale
+ * @value: adjustment value
+ *
+ * Emits #GtkScale::format-value signal to format the value,
+ * if no user signal handlers, falls back to a default format.
+ *
+ * Return value: formatted value
+ */
+gchar*
+_gtk_scale_format_value (GtkScale *scale,
+ gdouble value)
+{
+ gchar *fmt = NULL;
+
+ g_signal_emit (scale,
+ signals[FORMAT_VALUE],
+ 0,
+ value,
+ &fmt);
+
+ if (fmt)
+ return fmt;
+ else
+ /* insert a LRM, to prevent -20 to come out as 20- in RTL locales */
+ return g_strdup_printf ("\342\200\216%0.*f", scale->digits, value);
+}
static void
-gtk_scale_draw_background (GtkRange *range)
+gtk_scale_finalize (GObject *object)
+{
+ GtkScale *scale = GTK_SCALE (object);
+
+ _gtk_scale_clear_layout (scale);
+
+ G_OBJECT_CLASS (gtk_scale_parent_class)->finalize (object);
+}
+
+/**
+ * gtk_scale_get_layout:
+ * @scale: A #GtkScale
+ *
+ * Gets the #PangoLayout used to display the scale.
+ * The returned object is owned by the scale so does
+ * not need to be freed by the caller.
+ *
+ * Return value: the #PangoLayout for this scale, or %NULL
+ * if the #GtkScale:draw-value property is %FALSE.
+ *
+ * Since: 2.4
+ */
+PangoLayout *
+gtk_scale_get_layout (GtkScale *scale)
+{
+ GtkScalePrivate *priv = GTK_SCALE_GET_PRIVATE (scale);
+ gchar *txt;
+
+ g_return_val_if_fail (GTK_IS_SCALE (scale), NULL);
+
+ if (!priv->layout)
+ {
+ if (scale->draw_value)
+ priv->layout = gtk_widget_create_pango_layout (GTK_WIDGET (scale), NULL);
+ }
+
+ if (scale->draw_value)
+ {
+ txt = _gtk_scale_format_value (scale,
+ GTK_RANGE (scale)->adjustment->value);
+ pango_layout_set_text (priv->layout, txt, -1);
+ g_free (txt);
+ }
+
+ return priv->layout;
+}
+
+/**
+ * gtk_scale_get_layout_offsets:
+ * @scale: a #GtkScale
+ * @x: location to store X offset of layout, or %NULL
+ * @y: location to store Y offset of layout, or %NULL
+ *
+ * Obtains the coordinates where the scale will draw the
+ * #PangoLayout representing the text in the scale. Remember
+ * when using the #PangoLayout function you need to convert to
+ * and from pixels using PANGO_PIXELS() or #PANGO_SCALE.
+ *
+ * If the #GtkScale:draw-value property is %FALSE, the return
+ * values are undefined.
+ *
+ * Since: 2.4
+ */
+void
+gtk_scale_get_layout_offsets (GtkScale *scale,
+ gint *x,
+ gint *y)
{
- g_return_if_fail (range != NULL);
- g_return_if_fail (GTK_IS_SCALE (range));
+ gint local_x = 0;
+ gint local_y = 0;
+
+ g_return_if_fail (GTK_IS_SCALE (scale));
- gtk_scale_draw_value (GTK_SCALE (range));
+ if (GTK_SCALE_GET_CLASS (scale)->get_layout_offsets)
+ (GTK_SCALE_GET_CLASS (scale)->get_layout_offsets) (scale, &local_x, &local_y);
+
+ if (x)
+ *x = local_x;
+
+ if (y)
+ *y = local_y;
}
+
+void
+_gtk_scale_clear_layout (GtkScale *scale)
+{
+ GtkScalePrivate *priv = GTK_SCALE_GET_PRIVATE (scale);
+
+ g_return_if_fail (GTK_IS_SCALE (scale));
+
+ if (priv->layout)
+ {
+ g_object_unref (priv->layout);
+ priv->layout = NULL;
+ }
+}
+
+#define __GTK_SCALE_C__
+#include "gtkaliasdef.c"
projects / ~andy / gtk / blobdiff