* 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 "config.h"
+
#include <math.h>
-#include "gtkintl.h"
+#include <stdlib.h>
+
+#include "gdk/gdkkeysyms.h"
#include "gtkscale.h"
#include "gtkmarshalers.h"
-#include "gdk/gdkkeysyms.h"
#include "gtkbindings.h"
#include "gtkprivate.h"
+#include "gtkintl.h"
#include "gtkalias.h"
};
static guint signals[LAST_SIGNAL];
-static GtkRangeClass *parent_class = NULL;
-
-static void gtk_scale_class_init (GtkScaleClass *klass);
-static void gtk_scale_init (GtkScale *scale);
-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);
-
-GType
-gtk_scale_get_type (void)
-{
- static GType scale_type = 0;
- if (!scale_type)
- {
- static const GTypeInfo scale_info =
- {
- sizeof (GtkScaleClass),
- NULL, /* base_init */
- NULL, /* base_finalize */
- (GClassInitFunc) gtk_scale_class_init,
- NULL, /* class_finalize */
- NULL, /* class_data */
- sizeof (GtkScale),
- 0, /* n_preallocs */
- (GInstanceInitFunc) gtk_scale_init,
- NULL, /* value_table */
- };
-
- scale_type = g_type_register_static (GTK_TYPE_RANGE, g_intern_static_string ("GtkScale"),
- &scale_info, G_TYPE_FLAG_ABSTRACT);
- }
-
- 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,
}
-#define add_slider_binding(binding_set, keyval, mask, scroll) \
- gtk_binding_entry_add_signal (binding_set, keyval, mask, \
- "move_slider", 1, \
+#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
range_class = (GtkRangeClass*) class;
widget_class = (GtkWidgetClass*) class;
- parent_class = g_type_class_peek_parent (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 ("format_value",
+ g_signal_new (I_("format-value"),
G_TYPE_FROM_CLASS (gobject_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkScaleClass, format_value),
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);
+
+ 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_set_property (GObject *object,
guint prop_id,
}
}
-static void
-gtk_scale_init (GtkScale *scale)
+/**
+ * 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)
{
- GtkRange *range;
+ g_return_val_if_fail (adjustment == NULL || GTK_IS_ADJUSTMENT (adjustment),
+ NULL);
- range = GTK_RANGE (scale);
-
- GTK_WIDGET_SET_FLAGS (scale, GTK_CAN_FOCUS);
+ return g_object_new (GTK_TYPE_SCALE,
+ "orientation", orientation,
+ "adjustment", adjustment,
+ NULL);
+}
- 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_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;
+ }
+
+ 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)
}
}
+/**
+ * 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)
{
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,
gboolean 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)
{
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)
}
}
+/**
+ * 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)
{
_gtk_scale_clear_layout (GTK_SCALE (widget));
- (* GTK_WIDGET_CLASS (parent_class)->style_set) (widget, previous);
+ GTK_WIDGET_CLASS (gtk_scale_parent_class)->style_set (widget, previous);
}
static void
_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 "format_value" signal to format the value, if no user
- * signal handlers, falls back to a default format.
+ * 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)
if (fmt)
return fmt;
else
- return g_strdup_printf ("%0.*f", scale->digits,
- value);
+ /* 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_finalize (GObject *object)
{
- GtkScale *scale;
-
- g_return_if_fail (GTK_IS_SCALE (object));
-
- scale = GTK_SCALE (object);
+ GtkScale *scale = GTK_SCALE (object);
_gtk_scale_clear_layout (scale);
- G_OBJECT_CLASS (parent_class)->finalize (object);
+ 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.
+ * 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 draw_value property
- * is %FALSE.
+ * 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)
{
* @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
+ * 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 draw_value property is %FALSE, the return values are
- * undefined.
+ * 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)
{
- gint local_x, local_y;
+ gint local_x = 0;
+ gint local_y = 0;
g_return_if_fail (GTK_IS_SCALE (scale));
*y = local_y;
}
-void _gtk_scale_clear_layout (GtkScale *scale)
+void
+_gtk_scale_clear_layout (GtkScale *scale)
{
GtkScalePrivate *priv = GTK_SCALE_GET_PRIVATE (scale);
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