/* 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 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, see . */ /* * Modified by the GTK+ Team and others 1997-2004. 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 "gtkrangeprivate.h" #include "gtkadjustmentprivate.h" #include "gtkcolorscaleprivate.h" #include "gtkeventcontrollerscroll.h" #include "gtkgesturedrag.h" #include "gtkgesturelongpressprivate.h" #include "gtkgesturemultipress.h" #include "gtkgizmoprivate.h" #include "gtkintl.h" #include "gtkmarshalers.h" #include "gtkorientableprivate.h" #include "gtkprivate.h" #include "gtkscale.h" #include "gtktypebuiltins.h" #include "gtkeventcontrollerkey.h" #include "a11y/gtkrangeaccessible.h" #include #include /** * SECTION:gtkrange * @Short_description: Base class for widgets which visualize an adjustment * @Title: GtkRange * * #GtkRange is the common base class for widgets which visualize an * adjustment, e.g #GtkScale or #GtkScrollbar. * * Apart from signals for monitoring the parameters of the adjustment, * #GtkRange provides properties and methods for setting a * “fill level” on range widgets. See gtk_range_set_fill_level(). */ #define TIMEOUT_INITIAL 500 #define TIMEOUT_REPEAT 250 #define AUTOSCROLL_FACTOR 20 #define SCROLL_EDGE_SIZE 15 #define MARK_SNAP_LENGTH 12 typedef struct _GtkRangeStepTimer GtkRangeStepTimer; struct _GtkRangePrivate { GtkWidget *grab_location; /* "grabbed" mouse location, NULL for no grab */ GtkRangeStepTimer *timer; GtkAdjustment *adjustment; int slider_x; int slider_y; GtkWidget *trough_widget; GtkWidget *fill_widget; GtkWidget *highlight_widget; GtkWidget *slider_widget; GtkOrientation orientation; gdouble fill_level; gdouble *marks; gint *mark_pos; gint n_marks; gint round_digits; /* Round off value to this many digits, -1 for no rounding */ gint slide_initial_slider_position; gint slide_initial_coordinate_delta; guint flippable : 1; guint inverted : 1; guint slider_size_fixed : 1; guint trough_click_forward : 1; /* trough click was on the forward side of slider */ /* Whether we're doing fine adjustment */ guint zoom : 1; /* Fill level */ guint show_fill_level : 1; guint restrict_to_fill_level : 1; /* Whether dragging is ongoing */ guint in_drag : 1; GtkGesture *drag_gesture; GtkScrollType autoscroll_mode; guint autoscroll_id; }; enum { PROP_0, PROP_ADJUSTMENT, PROP_INVERTED, PROP_SHOW_FILL_LEVEL, PROP_RESTRICT_TO_FILL_LEVEL, PROP_FILL_LEVEL, PROP_ROUND_DIGITS, PROP_ORIENTATION, LAST_PROP = PROP_ORIENTATION }; enum { VALUE_CHANGED, ADJUST_BOUNDS, MOVE_SLIDER, CHANGE_VALUE, LAST_SIGNAL }; static void gtk_range_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_range_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gtk_range_finalize (GObject *object); static void gtk_range_destroy (GtkWidget *widget); static void gtk_range_measure (GtkWidget *widget, GtkOrientation orientation, int for_size, int *minimum, int *natural, int *minimum_baseline, int *natural_baseline); static void gtk_range_size_allocate (GtkWidget *widget, int width, int height, int baseline); static void gtk_range_unmap (GtkWidget *widget); static void gtk_range_multipress_gesture_pressed (GtkGestureMultiPress *gesture, guint n_press, gdouble x, gdouble y, GtkRange *range); static void gtk_range_multipress_gesture_released (GtkGestureMultiPress *gesture, guint n_press, gdouble x, gdouble y, GtkRange *range); static void gtk_range_drag_gesture_begin (GtkGestureDrag *gesture, gdouble offset_x, gdouble offset_y, GtkRange *range); static void gtk_range_drag_gesture_update (GtkGestureDrag *gesture, gdouble offset_x, gdouble offset_y, GtkRange *range); static void gtk_range_long_press_gesture_pressed (GtkGestureLongPress *gesture, gdouble x, gdouble y, GtkRange *range); static void update_slider_position (GtkRange *range, int mouse_x, int mouse_y); static void stop_scrolling (GtkRange *range); static void add_autoscroll (GtkRange *range); static void remove_autoscroll (GtkRange *range); /* Range methods */ static void gtk_range_move_slider (GtkRange *range, GtkScrollType scroll); /* Internals */ static void gtk_range_compute_slider_position (GtkRange *range, gdouble adjustment_value, GdkRectangle *slider_rect); static gboolean gtk_range_scroll (GtkRange *range, GtkScrollType scroll); static void gtk_range_calc_slider (GtkRange *range); static void gtk_range_calc_marks (GtkRange *range); static void gtk_range_adjustment_value_changed (GtkAdjustment *adjustment, gpointer data); static void gtk_range_adjustment_changed (GtkAdjustment *adjustment, gpointer data); static void gtk_range_add_step_timer (GtkRange *range, GtkScrollType step); static void gtk_range_remove_step_timer (GtkRange *range); static gboolean gtk_range_real_change_value (GtkRange *range, GtkScrollType scroll, gdouble value); static gboolean gtk_range_key_controller_key_pressed (GtkEventControllerKey *controller, guint keyval, guint keycode, GdkModifierType state, GtkWidget *widget); static void gtk_range_direction_changed (GtkWidget *widget, GtkTextDirection previous_direction); static void gtk_range_measure_trough (GtkGizmo *gizmo, GtkOrientation orientation, gint for_size, gint *minimum, gint *natural, gint *minimum_baseline, gint *natural_baseline); static void gtk_range_allocate_trough (GtkGizmo *gizmo, int width, int height, int baseline); static void gtk_range_render_trough (GtkGizmo *gizmo, GtkSnapshot *snapshot); static gboolean gtk_range_scroll_controller_scroll (GtkEventControllerScroll *scroll, gdouble dx, gdouble dy, GtkRange *range); G_DEFINE_TYPE_WITH_CODE (GtkRange, gtk_range, GTK_TYPE_WIDGET, G_ADD_PRIVATE (GtkRange) G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL)) static guint signals[LAST_SIGNAL]; static GParamSpec *properties[LAST_PROP]; static void gtk_range_snapshot (GtkWidget *widget, GtkSnapshot *snapshot) { GtkRange *range = GTK_RANGE (widget); GtkRangePrivate *priv = gtk_range_get_instance_private (range); gtk_widget_snapshot_child (widget, priv->trough_widget, snapshot); } static void gtk_range_class_init (GtkRangeClass *class) { GObjectClass *gobject_class; GtkWidgetClass *widget_class; gobject_class = G_OBJECT_CLASS (class); widget_class = (GtkWidgetClass*) class; gobject_class->set_property = gtk_range_set_property; gobject_class->get_property = gtk_range_get_property; gobject_class->finalize = gtk_range_finalize; widget_class->destroy = gtk_range_destroy; widget_class->measure = gtk_range_measure; widget_class->snapshot = gtk_range_snapshot; widget_class->size_allocate = gtk_range_size_allocate; widget_class->unmap = gtk_range_unmap; widget_class->direction_changed = gtk_range_direction_changed; class->move_slider = gtk_range_move_slider; class->change_value = gtk_range_real_change_value; /** * GtkRange::value-changed: * @range: the #GtkRange that received the signal * * Emitted when the range value changes. */ signals[VALUE_CHANGED] = g_signal_new (I_("value-changed"), G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkRangeClass, value_changed), NULL, NULL, NULL, G_TYPE_NONE, 0); /** * GtkRange::adjust-bounds: * @range: the #GtkRange that received the signal * @value: the value before we clamp * * Emitted before clamping a value, to give the application a * chance to adjust the bounds. */ signals[ADJUST_BOUNDS] = g_signal_new (I_("adjust-bounds"), G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkRangeClass, adjust_bounds), NULL, NULL, NULL, G_TYPE_NONE, 1, G_TYPE_DOUBLE); /** * GtkRange::move-slider: * @range: the #GtkRange that received the signal * @step: how to move the slider * * Virtual function that moves the slider. Used for keybindings. */ signals[MOVE_SLIDER] = g_signal_new (I_("move-slider"), G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkRangeClass, move_slider), NULL, NULL, NULL, G_TYPE_NONE, 1, GTK_TYPE_SCROLL_TYPE); /** * GtkRange::change-value: * @range: the #GtkRange that received the signal * @scroll: the type of scroll action that was performed * @value: the new value resulting from the scroll action * * The #GtkRange::change-value signal is emitted when a scroll action is * performed on a range. It allows an application to determine the * type of scroll event that occurred and the resultant new value. * The application can handle the event itself and return %TRUE to * prevent further processing. Or, by returning %FALSE, it can pass * the event to other handlers until the default GTK+ handler is * reached. * * The value parameter is unrounded. An application that overrides * the GtkRange::change-value signal is responsible for clamping the * value to the desired number of decimal digits; the default GTK+ * handler clamps the value based on #GtkRange:round-digits. * * Returns: %TRUE to prevent other handlers from being invoked for * the signal, %FALSE to propagate the signal further */ signals[CHANGE_VALUE] = g_signal_new (I_("change-value"), G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkRangeClass, change_value), _gtk_boolean_handled_accumulator, NULL, _gtk_marshal_BOOLEAN__ENUM_DOUBLE, G_TYPE_BOOLEAN, 2, GTK_TYPE_SCROLL_TYPE, G_TYPE_DOUBLE); g_object_class_override_property (gobject_class, PROP_ORIENTATION, "orientation"); properties[PROP_ADJUSTMENT] = g_param_spec_object ("adjustment", P_("Adjustment"), P_("The GtkAdjustment that contains the current value of this range object"), GTK_TYPE_ADJUSTMENT, GTK_PARAM_READWRITE|G_PARAM_CONSTRUCT); properties[PROP_INVERTED] = g_param_spec_boolean ("inverted", P_("Inverted"), P_("Invert direction slider moves to increase range value"), FALSE, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY); /** * GtkRange:show-fill-level: * * The show-fill-level property controls whether fill level indicator * graphics are displayed on the trough. See * gtk_range_set_show_fill_level(). **/ properties[PROP_SHOW_FILL_LEVEL] = g_param_spec_boolean ("show-fill-level", P_("Show Fill Level"), P_("Whether to display a fill level indicator graphics on trough."), FALSE, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY); /** * GtkRange:restrict-to-fill-level: * * The restrict-to-fill-level property controls whether slider * movement is restricted to an upper boundary set by the * fill level. See gtk_range_set_restrict_to_fill_level(). **/ properties[PROP_RESTRICT_TO_FILL_LEVEL] = g_param_spec_boolean ("restrict-to-fill-level", P_("Restrict to Fill Level"), P_("Whether to restrict the upper boundary to the fill level."), TRUE, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY); /** * GtkRange:fill-level: * * The fill level (e.g. prebuffering of a network stream). * See gtk_range_set_fill_level(). **/ properties[PROP_FILL_LEVEL] = g_param_spec_double ("fill-level", P_("Fill Level"), P_("The fill level."), -G_MAXDOUBLE, G_MAXDOUBLE, G_MAXDOUBLE, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY); /** * GtkRange:round-digits: * * The number of digits to round the value to when * it changes, or -1. See #GtkRange::change-value. */ properties[PROP_ROUND_DIGITS] = g_param_spec_int ("round-digits", P_("Round Digits"), P_("The number of digits to round the value to."), -1, G_MAXINT, -1, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY); g_object_class_install_properties (gobject_class, LAST_PROP, properties); gtk_widget_class_set_accessible_type (widget_class, GTK_TYPE_RANGE_ACCESSIBLE); gtk_widget_class_set_css_name (widget_class, I_("range")); } static void gtk_range_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkRange *range = GTK_RANGE (object); GtkRangePrivate *priv = gtk_range_get_instance_private (range); switch (prop_id) { case PROP_ORIENTATION: if (priv->orientation != g_value_get_enum (value)) { priv->orientation = g_value_get_enum (value); _gtk_orientable_set_style_classes (GTK_ORIENTABLE (range)); gtk_widget_queue_resize (GTK_WIDGET (range)); g_object_notify_by_pspec (object, pspec); } break; case PROP_ADJUSTMENT: gtk_range_set_adjustment (range, g_value_get_object (value)); break; case PROP_INVERTED: gtk_range_set_inverted (range, g_value_get_boolean (value)); break; case PROP_SHOW_FILL_LEVEL: gtk_range_set_show_fill_level (range, g_value_get_boolean (value)); break; case PROP_RESTRICT_TO_FILL_LEVEL: gtk_range_set_restrict_to_fill_level (range, g_value_get_boolean (value)); break; case PROP_FILL_LEVEL: gtk_range_set_fill_level (range, g_value_get_double (value)); break; case PROP_ROUND_DIGITS: gtk_range_set_round_digits (range, g_value_get_int (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_range_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkRange *range = GTK_RANGE (object); GtkRangePrivate *priv = gtk_range_get_instance_private (range); switch (prop_id) { case PROP_ORIENTATION: g_value_set_enum (value, priv->orientation); break; case PROP_ADJUSTMENT: g_value_set_object (value, priv->adjustment); break; case PROP_INVERTED: g_value_set_boolean (value, priv->inverted); break; case PROP_SHOW_FILL_LEVEL: g_value_set_boolean (value, gtk_range_get_show_fill_level (range)); break; case PROP_RESTRICT_TO_FILL_LEVEL: g_value_set_boolean (value, gtk_range_get_restrict_to_fill_level (range)); break; case PROP_FILL_LEVEL: g_value_set_double (value, gtk_range_get_fill_level (range)); break; case PROP_ROUND_DIGITS: g_value_set_int (value, gtk_range_get_round_digits (range)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_range_init (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkGesture *gesture; GtkEventController *controller; gtk_widget_set_has_surface (GTK_WIDGET (range), FALSE); priv->orientation = GTK_ORIENTATION_HORIZONTAL; priv->adjustment = NULL; priv->inverted = FALSE; priv->flippable = FALSE; priv->round_digits = -1; priv->show_fill_level = FALSE; priv->restrict_to_fill_level = TRUE; priv->fill_level = G_MAXDOUBLE; priv->timer = NULL; _gtk_orientable_set_style_classes (GTK_ORIENTABLE (range)); priv->trough_widget = gtk_gizmo_new ("trough", gtk_range_measure_trough, gtk_range_allocate_trough, gtk_range_render_trough, NULL); gtk_widget_set_parent (priv->trough_widget, GTK_WIDGET (range)); priv->slider_widget = gtk_gizmo_new ("slider", NULL, NULL, NULL, NULL); gtk_widget_set_parent (priv->slider_widget, priv->trough_widget); /* Note: Order is important here. * The ::drag-begin handler relies on the state set up by the * multipress ::pressed handler. Gestures are handling events * in the oppposite order in which they are added to their * widget. */ priv->drag_gesture = gtk_gesture_drag_new (); gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (priv->drag_gesture), 0); g_signal_connect (priv->drag_gesture, "drag-begin", G_CALLBACK (gtk_range_drag_gesture_begin), range); g_signal_connect (priv->drag_gesture, "drag-update", G_CALLBACK (gtk_range_drag_gesture_update), range); gtk_widget_add_controller (GTK_WIDGET (range), GTK_EVENT_CONTROLLER (priv->drag_gesture)); gesture = gtk_gesture_multi_press_new (); gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), 0); g_signal_connect (gesture, "pressed", G_CALLBACK (gtk_range_multipress_gesture_pressed), range); g_signal_connect (gesture, "released", G_CALLBACK (gtk_range_multipress_gesture_released), range); gtk_widget_add_controller (GTK_WIDGET (range), GTK_EVENT_CONTROLLER (gesture)); gtk_gesture_group (priv->drag_gesture, gesture); gesture = gtk_gesture_long_press_new (); g_object_set (gesture, "delay-factor", 2.0, NULL); g_signal_connect (gesture, "pressed", G_CALLBACK (gtk_range_long_press_gesture_pressed), range); gtk_widget_add_controller (GTK_WIDGET (range), GTK_EVENT_CONTROLLER (gesture)); gtk_gesture_group (priv->drag_gesture, gesture); controller = gtk_event_controller_scroll_new (GTK_EVENT_CONTROLLER_SCROLL_BOTH_AXES); g_signal_connect (controller, "scroll", G_CALLBACK (gtk_range_scroll_controller_scroll), range); gtk_widget_add_controller (GTK_WIDGET (range), controller); controller = gtk_event_controller_key_new (); g_signal_connect (controller, "key-pressed", G_CALLBACK (gtk_range_key_controller_key_pressed), range); gtk_widget_add_controller (GTK_WIDGET (range), controller); } /** * gtk_range_get_adjustment: * @range: a #GtkRange * * Get the #GtkAdjustment which is the “model” object for #GtkRange. * See gtk_range_set_adjustment() for details. * The return value does not have a reference added, so should not * be unreferenced. * * Returns: (transfer none): a #GtkAdjustment **/ GtkAdjustment* gtk_range_get_adjustment (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_val_if_fail (GTK_IS_RANGE (range), NULL); if (!priv->adjustment) gtk_range_set_adjustment (range, NULL); return priv->adjustment; } /** * gtk_range_set_adjustment: * @range: a #GtkRange * @adjustment: a #GtkAdjustment * * Sets the adjustment to be used as the “model” object for this range * widget. The adjustment indicates the current range value, the * minimum and maximum range values, the step/page increments used * for keybindings and scrolling, and the page size. The page size * is normally 0 for #GtkScale and nonzero for #GtkScrollbar, and * indicates the size of the visible area of the widget being scrolled. * The page size affects the size of the scrollbar slider. **/ void gtk_range_set_adjustment (GtkRange *range, GtkAdjustment *adjustment) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_if_fail (GTK_IS_RANGE (range)); if (!adjustment) adjustment = gtk_adjustment_new (0.0, 0.0, 0.0, 0.0, 0.0, 0.0); else g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment)); if (priv->adjustment != adjustment) { if (priv->adjustment) { g_signal_handlers_disconnect_by_func (priv->adjustment, gtk_range_adjustment_changed, range); g_signal_handlers_disconnect_by_func (priv->adjustment, gtk_range_adjustment_value_changed, range); g_object_unref (priv->adjustment); } priv->adjustment = adjustment; g_object_ref_sink (adjustment); g_signal_connect (adjustment, "changed", G_CALLBACK (gtk_range_adjustment_changed), range); g_signal_connect (adjustment, "value-changed", G_CALLBACK (gtk_range_adjustment_value_changed), range); gtk_range_adjustment_changed (adjustment, range); gtk_range_adjustment_value_changed (adjustment, range); g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_ADJUSTMENT]); } } static gboolean should_invert (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) return (priv->inverted && !priv->flippable) || (priv->inverted && priv->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_LTR) || (!priv->inverted && priv->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL); else return priv->inverted; } static gboolean should_invert_move (GtkRange *range, GtkOrientation move_orientation) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); /* If the move is parallel to the range, use general check for inversion */ if (move_orientation == priv->orientation) return should_invert (range); /* H scale/V move: Always invert, so down/up always dec/increase the value */ if (priv->orientation == GTK_ORIENTATION_HORIZONTAL && GTK_IS_SCALE (range)) return TRUE; /* V range/H move: Left/right always dec/increase the value */ return FALSE; } static void update_highlight_position (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkStyleContext *context; if (!priv->highlight_widget) return; context = gtk_widget_get_style_context (priv->highlight_widget); if (should_invert (range)) { gtk_style_context_remove_class (context, GTK_STYLE_CLASS_TOP); gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM); } else { gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BOTTOM); gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP); } } static void update_fill_position (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkStyleContext *context; if (!priv->fill_widget) return; context = gtk_widget_get_style_context (priv->fill_widget); if (should_invert (range)) { gtk_style_context_remove_class (context, GTK_STYLE_CLASS_TOP); gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM); } else { gtk_style_context_remove_class (context, GTK_STYLE_CLASS_BOTTOM); gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP); } } /** * gtk_range_set_inverted: * @range: a #GtkRange * @setting: %TRUE to invert the range * * Ranges normally move from lower to higher values as the * slider moves from top to bottom or left to right. Inverted * ranges have higher values at the top or on the right rather than * on the bottom or left. **/ void gtk_range_set_inverted (GtkRange *range, gboolean setting) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_if_fail (GTK_IS_RANGE (range)); setting = setting != FALSE; if (setting != priv->inverted) { priv->inverted = setting; update_fill_position (range); update_highlight_position (range); gtk_widget_queue_resize (GTK_WIDGET (range)); g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_INVERTED]); } } /** * gtk_range_get_inverted: * @range: a #GtkRange * * Gets the value set by gtk_range_set_inverted(). * * Returns: %TRUE if the range is inverted **/ gboolean gtk_range_get_inverted (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_val_if_fail (GTK_IS_RANGE (range), FALSE); return priv->inverted; } /** * gtk_range_set_flippable: * @range: a #GtkRange * @flippable: %TRUE to make the range flippable * * If a range is flippable, it will switch its direction if it is * horizontal and its direction is %GTK_TEXT_DIR_RTL. * * See gtk_widget_get_direction(). **/ void gtk_range_set_flippable (GtkRange *range, gboolean flippable) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_if_fail (GTK_IS_RANGE (range)); flippable = flippable ? TRUE : FALSE; if (flippable != priv->flippable) { priv->flippable = flippable; update_fill_position (range); update_highlight_position (range); gtk_widget_queue_allocate (GTK_WIDGET (range)); } } /** * gtk_range_get_flippable: * @range: a #GtkRange * * Gets the value set by gtk_range_set_flippable(). * * Returns: %TRUE if the range is flippable **/ gboolean gtk_range_get_flippable (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_val_if_fail (GTK_IS_RANGE (range), FALSE); return priv->flippable; } /** * gtk_range_set_slider_size_fixed: * @range: a #GtkRange * @size_fixed: %TRUE to make the slider size constant * * Sets whether the range’s slider has a fixed size, or a size that * depends on its adjustment’s page size. * * This function is useful mainly for #GtkRange subclasses. **/ void gtk_range_set_slider_size_fixed (GtkRange *range, gboolean size_fixed) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_if_fail (GTK_IS_RANGE (range)); if (size_fixed != priv->slider_size_fixed) { priv->slider_size_fixed = size_fixed ? TRUE : FALSE; if (priv->adjustment && gtk_widget_get_mapped (GTK_WIDGET (range))) gtk_widget_queue_allocate (priv->trough_widget); } } /** * gtk_range_get_slider_size_fixed: * @range: a #GtkRange * * This function is useful mainly for #GtkRange subclasses. * * See gtk_range_set_slider_size_fixed(). * * Returns: whether the range’s slider has a fixed size. **/ gboolean gtk_range_get_slider_size_fixed (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_val_if_fail (GTK_IS_RANGE (range), FALSE); return priv->slider_size_fixed; } /** * gtk_range_get_range_rect: * @range: a #GtkRange * @range_rect: (out): return location for the range rectangle * * This function returns the area that contains the range’s trough, * in coordinates relative to @range's origin. * * This function is useful mainly for #GtkRange subclasses. **/ void gtk_range_get_range_rect (GtkRange *range, GdkRectangle *range_rect) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); graphene_rect_t r; g_return_if_fail (GTK_IS_RANGE (range)); g_return_if_fail (range_rect != NULL); if (!gtk_widget_compute_bounds (priv->trough_widget, GTK_WIDGET (range), &r)) { *range_rect = (GdkRectangle) { 0, 0, 0, 0 }; } else { *range_rect = (GdkRectangle) { floorf (r.origin.x), floorf (r.origin.y), ceilf (r.size.width), ceilf (r.size.height), }; } } /** * gtk_range_get_slider_range: * @range: a #GtkRange * @slider_start: (out) (allow-none): return location for the slider's * start, or %NULL * @slider_end: (out) (allow-none): return location for the slider's * end, or %NULL * * This function returns sliders range along the long dimension, * in widget->window coordinates. * * This function is useful mainly for #GtkRange subclasses. **/ void gtk_range_get_slider_range (GtkRange *range, gint *slider_start, gint *slider_end) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); graphene_rect_t slider_bounds; g_return_if_fail (GTK_IS_RANGE (range)); if (!gtk_widget_compute_bounds (priv->slider_widget, GTK_WIDGET (range), &slider_bounds)) { if (slider_start) *slider_start = 0; if (slider_end) *slider_end = 0; return; } if (priv->orientation == GTK_ORIENTATION_VERTICAL) { if (slider_start) *slider_start = slider_bounds.origin.y; if (slider_end) *slider_end = slider_bounds.origin.y + slider_bounds.size.height; } else { if (slider_start) *slider_start = slider_bounds.origin.y; if (slider_end) *slider_end = slider_bounds.origin.x + slider_bounds.size.width; } } /** * gtk_range_set_increments: * @range: a #GtkRange * @step: step size * @page: page size * * Sets the step and page sizes for the range. * The step size is used when the user clicks the #GtkScrollbar * arrows or moves #GtkScale via arrow keys. The page size * is used for example when moving via Page Up or Page Down keys. **/ void gtk_range_set_increments (GtkRange *range, gdouble step, gdouble page) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkAdjustment *adjustment; g_return_if_fail (GTK_IS_RANGE (range)); adjustment = priv->adjustment; gtk_adjustment_configure (adjustment, gtk_adjustment_get_value (adjustment), gtk_adjustment_get_lower (adjustment), gtk_adjustment_get_upper (adjustment), step, page, gtk_adjustment_get_page_size (adjustment)); } /** * gtk_range_set_range: * @range: a #GtkRange * @min: minimum range value * @max: maximum range value * * Sets the allowable values in the #GtkRange, and clamps the range * value to be between @min and @max. (If the range has a non-zero * page size, it is clamped between @min and @max - page-size.) **/ void gtk_range_set_range (GtkRange *range, gdouble min, gdouble max) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkAdjustment *adjustment; gdouble value; g_return_if_fail (GTK_IS_RANGE (range)); g_return_if_fail (min <= max); adjustment = priv->adjustment; value = gtk_adjustment_get_value (adjustment); if (priv->restrict_to_fill_level) value = MIN (value, MAX (gtk_adjustment_get_lower (adjustment), priv->fill_level)); gtk_adjustment_configure (adjustment, value, min, max, gtk_adjustment_get_step_increment (adjustment), gtk_adjustment_get_page_increment (adjustment), gtk_adjustment_get_page_size (adjustment)); } /** * gtk_range_set_value: * @range: a #GtkRange * @value: new value of the range * * Sets the current value of the range; if the value is outside the * minimum or maximum range values, it will be clamped to fit inside * them. The range emits the #GtkRange::value-changed signal if the * value changes. **/ void gtk_range_set_value (GtkRange *range, gdouble value) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_if_fail (GTK_IS_RANGE (range)); if (priv->restrict_to_fill_level) value = MIN (value, MAX (gtk_adjustment_get_lower (priv->adjustment), priv->fill_level)); gtk_adjustment_set_value (priv->adjustment, value); } /** * gtk_range_get_value: * @range: a #GtkRange * * Gets the current value of the range. * * Returns: current value of the range. **/ gdouble gtk_range_get_value (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_val_if_fail (GTK_IS_RANGE (range), 0.0); return gtk_adjustment_get_value (priv->adjustment); } /** * gtk_range_set_show_fill_level: * @range: A #GtkRange * @show_fill_level: Whether a fill level indicator graphics is shown. * * Sets whether a graphical fill level is show on the trough. See * gtk_range_set_fill_level() for a general description of the fill * level concept. **/ void gtk_range_set_show_fill_level (GtkRange *range, gboolean show_fill_level) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_if_fail (GTK_IS_RANGE (range)); show_fill_level = show_fill_level ? TRUE : FALSE; if (show_fill_level == priv->show_fill_level) return; priv->show_fill_level = show_fill_level; if (show_fill_level) { priv->fill_widget = gtk_gizmo_new ("fill", NULL, NULL, NULL, NULL); gtk_widget_insert_after (priv->fill_widget, priv->trough_widget, NULL); update_fill_position (range); } else { g_clear_pointer (&priv->fill_widget, gtk_widget_unparent); } g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_SHOW_FILL_LEVEL]); gtk_widget_queue_allocate (GTK_WIDGET (range)); } /** * gtk_range_get_show_fill_level: * @range: A #GtkRange * * Gets whether the range displays the fill level graphically. * * Returns: %TRUE if @range shows the fill level. **/ gboolean gtk_range_get_show_fill_level (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_val_if_fail (GTK_IS_RANGE (range), FALSE); return priv->show_fill_level; } /** * gtk_range_set_restrict_to_fill_level: * @range: A #GtkRange * @restrict_to_fill_level: Whether the fill level restricts slider movement. * * Sets whether the slider is restricted to the fill level. See * gtk_range_set_fill_level() for a general description of the fill * level concept. **/ void gtk_range_set_restrict_to_fill_level (GtkRange *range, gboolean restrict_to_fill_level) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_if_fail (GTK_IS_RANGE (range)); restrict_to_fill_level = restrict_to_fill_level ? TRUE : FALSE; if (restrict_to_fill_level != priv->restrict_to_fill_level) { priv->restrict_to_fill_level = restrict_to_fill_level; g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_RESTRICT_TO_FILL_LEVEL]); gtk_range_set_value (range, gtk_range_get_value (range)); } } /** * gtk_range_get_restrict_to_fill_level: * @range: A #GtkRange * * Gets whether the range is restricted to the fill level. * * Returns: %TRUE if @range is restricted to the fill level. **/ gboolean gtk_range_get_restrict_to_fill_level (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_val_if_fail (GTK_IS_RANGE (range), FALSE); return priv->restrict_to_fill_level; } /** * gtk_range_set_fill_level: * @range: a #GtkRange * @fill_level: the new position of the fill level indicator * * Set the new position of the fill level indicator. * * The “fill level” is probably best described by its most prominent * use case, which is an indicator for the amount of pre-buffering in * a streaming media player. In that use case, the value of the range * would indicate the current play position, and the fill level would * be the position up to which the file/stream has been downloaded. * * This amount of prebuffering can be displayed on the range’s trough * and is themeable separately from the trough. To enable fill level * display, use gtk_range_set_show_fill_level(). The range defaults * to not showing the fill level. * * Additionally, it’s possible to restrict the range’s slider position * to values which are smaller than the fill level. This is controller * by gtk_range_set_restrict_to_fill_level() and is by default * enabled. **/ void gtk_range_set_fill_level (GtkRange *range, gdouble fill_level) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_if_fail (GTK_IS_RANGE (range)); if (fill_level != priv->fill_level) { priv->fill_level = fill_level; g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_FILL_LEVEL]); if (priv->show_fill_level) gtk_widget_queue_allocate (GTK_WIDGET (range)); if (priv->restrict_to_fill_level) gtk_range_set_value (range, gtk_range_get_value (range)); } } /** * gtk_range_get_fill_level: * @range: A #GtkRange * * Gets the current position of the fill level indicator. * * Returns: The current fill level **/ gdouble gtk_range_get_fill_level (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_val_if_fail (GTK_IS_RANGE (range), 0.0); return priv->fill_level; } static void gtk_range_destroy (GtkWidget *widget) { GtkRange *range = GTK_RANGE (widget); GtkRangePrivate *priv = gtk_range_get_instance_private (range); gtk_range_remove_step_timer (range); if (priv->adjustment) { g_signal_handlers_disconnect_by_func (priv->adjustment, gtk_range_adjustment_changed, range); g_signal_handlers_disconnect_by_func (priv->adjustment, gtk_range_adjustment_value_changed, range); g_object_unref (priv->adjustment); priv->adjustment = NULL; } if (priv->n_marks) { g_free (priv->marks); priv->marks = NULL; g_free (priv->mark_pos); priv->mark_pos = NULL; priv->n_marks = 0; } GTK_WIDGET_CLASS (gtk_range_parent_class)->destroy (widget); } static void gtk_range_finalize (GObject *object) { GtkRange *range = GTK_RANGE (object); GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_clear_pointer (&priv->slider_widget, gtk_widget_unparent); g_clear_pointer (&priv->fill_widget, gtk_widget_unparent); g_clear_pointer (&priv->highlight_widget, gtk_widget_unparent); g_clear_pointer (&priv->trough_widget, gtk_widget_unparent); G_OBJECT_CLASS (gtk_range_parent_class)->finalize (object); } static void gtk_range_measure_trough (GtkGizmo *gizmo, GtkOrientation orientation, gint for_size, gint *minimum, gint *natural, gint *minimum_baseline, gint *natural_baseline) { GtkWidget *widget = gtk_widget_get_parent (GTK_WIDGET (gizmo)); GtkRange *range = GTK_RANGE (widget); GtkRangePrivate *priv = gtk_range_get_instance_private (range); gint min, nat; gtk_widget_measure (priv->slider_widget, orientation, -1, minimum, natural, NULL, NULL); if (priv->fill_widget) { gtk_widget_measure (priv->fill_widget, orientation, for_size, &min, &nat, NULL, NULL); *minimum = MAX (*minimum, min); *natural = MAX (*natural, nat); } if (priv->highlight_widget) { gtk_widget_measure (priv->highlight_widget, orientation, for_size, &min, &nat, NULL, NULL); *minimum = MAX (*minimum, min); *natural = MAX (*natural, nat); } } static void gtk_range_measure (GtkWidget *widget, GtkOrientation orientation, int for_size, int *minimum, int *natural, int *minimum_baseline, int *natural_baseline) { GtkRange *range = GTK_RANGE (widget); GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkBorder border = { 0 }; /* Measure the main box */ gtk_widget_measure (priv->trough_widget, orientation, -1, minimum, natural, NULL, NULL); if (GTK_RANGE_GET_CLASS (range)->get_range_border) GTK_RANGE_GET_CLASS (range)->get_range_border (range, &border); /* Add the border */ if (orientation == GTK_ORIENTATION_HORIZONTAL) { *minimum += border.left + border.right; *natural += border.left + border.right; } else { *minimum += border.top + border.bottom; *natural += border.top + border.bottom; } if (GTK_RANGE_GET_CLASS (range)->get_range_size_request) { gint min, nat; GTK_RANGE_GET_CLASS (range)->get_range_size_request (range, orientation, &min, &nat); *minimum = MAX (*minimum, min); *natural = MAX (*natural, nat); } } static void gtk_range_allocate_trough (GtkGizmo *gizmo, int width, int height, int baseline) { GtkWidget *widget = gtk_widget_get_parent (GTK_WIDGET (gizmo)); GtkRange *range = GTK_RANGE (widget); GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkAllocation slider_alloc; const double lower = gtk_adjustment_get_lower (priv->adjustment); const double upper = gtk_adjustment_get_upper (priv->adjustment); const double page_size = gtk_adjustment_get_page_size (priv->adjustment); double value; /* Slider */ gtk_range_calc_marks (range); gtk_range_compute_slider_position (range, gtk_adjustment_get_value (priv->adjustment), &slider_alloc); gtk_widget_size_allocate (priv->slider_widget, &slider_alloc, -1); priv->slider_x = slider_alloc.x; priv->slider_y = slider_alloc.y; if (lower == upper) value = 0; else value = (gtk_adjustment_get_value (priv->adjustment) - lower) / (upper - lower); if (priv->show_fill_level && upper - page_size - lower != 0) { double level, fill; GtkAllocation fill_alloc; fill_alloc = (GtkAllocation) {0, 0, width, height}; level = CLAMP (priv->fill_level, lower, upper - page_size); fill = (level - lower) / (upper - lower - page_size); if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { fill_alloc.width *= fill; if (should_invert (range)) fill_alloc.x += width - fill_alloc.width; } else { fill_alloc.height *= fill; if (should_invert (range)) fill_alloc.y += height - fill_alloc.height; } gtk_widget_size_allocate (priv->fill_widget, &fill_alloc, -1); } if (priv->highlight_widget) { GtkAllocation highlight_alloc; int min, nat; gtk_widget_measure (priv->highlight_widget, priv->orientation, -1, &min, &nat, NULL, NULL); if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { highlight_alloc.y = 0; highlight_alloc.height = height; if (!should_invert (range)) highlight_alloc.x = 0; else highlight_alloc.x = (width * (1 - value)); highlight_alloc.width = MAX (min, width * value); } else { highlight_alloc.x = 0; highlight_alloc.width = width; if (!should_invert (range)) highlight_alloc.y = 0; else highlight_alloc.y = (height * (1 - value)); highlight_alloc.height = MAX (min, height * value); } gtk_widget_size_allocate (priv->highlight_widget, &highlight_alloc, -1); } } /* Clamp dimensions and border inside allocation, such that we prefer * to take space from border not dimensions in all directions, and prefer to * give space to border over dimensions in one direction. */ static void clamp_dimensions (int range_width, int range_height, int *width, int *height, GtkBorder *border, gboolean border_expands_horizontally) { gint extra, shortage; /* Width */ extra = range_width - border->left - border->right - *width; if (extra > 0) { if (border_expands_horizontally) { border->left += extra / 2; border->right += extra / 2 + extra % 2; } else { *width += extra; } } /* See if we can fit rect, if not kill the border */ shortage = *width - range_width; if (shortage > 0) { *width = range_width; /* lose the border */ border->left = 0; border->right = 0; } else { /* See if we can fit rect with borders */ shortage = *width + border->left + border->right - range_width; if (shortage > 0) { /* Shrink borders */ border->left -= shortage / 2; border->right -= shortage / 2 + shortage % 2; } } /* Height */ extra = range_height - border->top - border->bottom - *height; if (extra > 0) { if (border_expands_horizontally) { /* don't expand border vertically */ *height += extra; } else { border->top += extra / 2; border->bottom += extra / 2 + extra % 2; } } /* See if we can fit rect, if not kill the border */ shortage = *height - range_height; if (shortage > 0) { *height = range_height; /* lose the border */ border->top = 0; border->bottom = 0; } else { /* See if we can fit rect with borders */ shortage = *height + border->top + border->bottom - range_height; if (shortage > 0) { /* Shrink borders */ border->top -= shortage / 2; border->bottom -= shortage / 2 + shortage % 2; } } } static void gtk_range_size_allocate (GtkWidget *widget, int width, int height, int baseline) { GtkRange *range = GTK_RANGE (widget); GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkBorder border = { 0 }; GtkAllocation box_alloc; int box_min_width, box_min_height; if (GTK_RANGE_GET_CLASS (range)->get_range_border) GTK_RANGE_GET_CLASS (range)->get_range_border (range, &border); gtk_widget_measure (priv->trough_widget, GTK_ORIENTATION_HORIZONTAL, -1, &box_min_width, NULL, NULL, NULL); gtk_widget_measure (priv->trough_widget, GTK_ORIENTATION_VERTICAL, -1, &box_min_height, NULL, NULL, NULL); if (priv->orientation == GTK_ORIENTATION_VERTICAL) clamp_dimensions (width, height, &box_min_width, &box_min_height, &border, TRUE); else clamp_dimensions (width, height, &box_min_width, &box_min_height, &border, FALSE); box_alloc.x = border.left; box_alloc.y = border.top; box_alloc.width = box_min_width; box_alloc.height = box_min_height; gtk_widget_size_allocate (priv->trough_widget, &box_alloc, -1); /* TODO: we should compute a proper clip from get_range_border(), * but this will at least give us outset shadows. */ } static void gtk_range_unmap (GtkWidget *widget) { GtkRange *range = GTK_RANGE (widget); stop_scrolling (range); GTK_WIDGET_CLASS (gtk_range_parent_class)->unmap (widget); } static void gtk_range_direction_changed (GtkWidget *widget, GtkTextDirection previous_direction) { GtkRange *range = GTK_RANGE (widget); update_fill_position (range); update_highlight_position (range); GTK_WIDGET_CLASS (gtk_range_parent_class)->direction_changed (widget, previous_direction); } static void gtk_range_render_trough (GtkGizmo *gizmo, GtkSnapshot *snapshot) { GtkWidget *widget = gtk_widget_get_parent (GTK_WIDGET (gizmo)); GtkRange *range = GTK_RANGE (widget); GtkRangePrivate *priv = gtk_range_get_instance_private (range); /* HACK: GtkColorScale wants to draw its own trough * so we let it... */ if (GTK_IS_COLOR_SCALE (widget)) gtk_color_scale_snapshot_trough (GTK_COLOR_SCALE (widget), snapshot, gtk_widget_get_width (GTK_WIDGET (gizmo)), gtk_widget_get_height (GTK_WIDGET (gizmo))); if (priv->show_fill_level && gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) != 0) gtk_widget_snapshot_child (GTK_WIDGET (gizmo), priv->fill_widget, snapshot); if (priv->highlight_widget) gtk_widget_snapshot_child (GTK_WIDGET (gizmo), priv->highlight_widget, snapshot); gtk_widget_snapshot_child (GTK_WIDGET (gizmo), priv->slider_widget, snapshot); } static void range_grab_add (GtkRange *range, GtkWidget *location) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkStyleContext *context; context = gtk_widget_get_style_context (GTK_WIDGET (range)); /* Don't perform any GDK/GTK+ grab here. Since a button * is down, there's an ongoing implicit grab on * the widget, which pretty much guarantees this * is the only widget receiving the pointer events. */ priv->grab_location = location; gtk_style_context_add_class (context, "dragging"); } static void update_zoom_state (GtkRange *range, gboolean enabled) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkStyleContext *context; context = gtk_widget_get_style_context (GTK_WIDGET (range)); if (enabled) gtk_style_context_add_class (context, "fine-tune"); else gtk_style_context_remove_class (context, "fine-tune"); priv->zoom = enabled; } static void range_grab_remove (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkStyleContext *context; if (!priv->grab_location) return; context = gtk_widget_get_style_context (GTK_WIDGET (range)); priv->grab_location = NULL; update_zoom_state (range, FALSE); gtk_style_context_remove_class (context, "dragging"); } static GtkScrollType range_get_scroll_for_grab (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); if (!priv->grab_location) return GTK_SCROLL_NONE; /* In the trough */ if (priv->grab_location == priv->trough_widget) { if (priv->trough_click_forward) return GTK_SCROLL_PAGE_FORWARD; else return GTK_SCROLL_PAGE_BACKWARD; } return GTK_SCROLL_NONE; } static gdouble coord_to_value (GtkRange *range, gdouble coord) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gdouble frac; gdouble value; gint trough_length; gint slider_length; graphene_rect_t slider_bounds; if (!gtk_widget_compute_bounds (priv->slider_widget, priv->slider_widget, &slider_bounds)) graphene_rect_init (&slider_bounds, 0, 0, gtk_widget_get_width (priv->trough_widget), gtk_widget_get_height (priv->trough_widget)); if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { trough_length = gtk_widget_get_width (priv->trough_widget); slider_length = slider_bounds.size.width; } else { trough_length = gtk_widget_get_height (priv->trough_widget); slider_length = slider_bounds.size.height; } if (trough_length == slider_length) { frac = 1.0; } else { if (priv->slider_size_fixed) frac = MAX (0, coord) / (double) (trough_length); else frac = MAX (0, coord) / (double) (trough_length - slider_length); } if (should_invert (range)) frac = 1.0 - frac; value = gtk_adjustment_get_lower (priv->adjustment) + frac * (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment)); return value; } static gboolean gtk_range_key_controller_key_pressed (GtkEventControllerKey *controller, guint keyval, guint keycode, GdkModifierType state, GtkWidget *widget) { GtkRange *range = GTK_RANGE (widget); GtkRangePrivate *priv = gtk_range_get_instance_private (range); if (gtk_gesture_is_active (priv->drag_gesture) && keyval == GDK_KEY_Escape && priv->grab_location != NULL) { stop_scrolling (range); return GDK_EVENT_STOP; } else if (priv->in_drag && (keyval == GDK_KEY_Shift_L || keyval == GDK_KEY_Shift_R)) { graphene_rect_t slider_bounds; if (!gtk_widget_compute_bounds (priv->slider_widget, priv->trough_widget, &slider_bounds)) return GDK_EVENT_STOP; if (priv->orientation == GTK_ORIENTATION_VERTICAL) priv->slide_initial_slider_position = slider_bounds.origin.y; else priv->slide_initial_slider_position = slider_bounds.origin.x; update_zoom_state (range, !priv->zoom); return GDK_EVENT_STOP; } return GDK_EVENT_PROPAGATE; } static void update_initial_slider_position (GtkRange *range, double x, double y) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); int trough_x, trough_y; gtk_widget_translate_coordinates (GTK_WIDGET (range), priv->trough_widget, x, y, &trough_x, &trough_y); if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) { priv->slide_initial_slider_position = MAX (0, priv->slider_x); priv->slide_initial_coordinate_delta = trough_x - priv->slide_initial_slider_position; } else { priv->slide_initial_slider_position = MAX (0, priv->slider_y); priv->slide_initial_coordinate_delta = trough_y - priv->slide_initial_slider_position; } } static void gtk_range_long_press_gesture_pressed (GtkGestureLongPress *gesture, gdouble x, gdouble y, GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkWidget *mouse_location; mouse_location = gtk_widget_pick (GTK_WIDGET (range), x, y, GTK_PICK_DEFAULT); if (mouse_location == priv->slider_widget && !priv->zoom) { update_initial_slider_position (range, x, y); update_zoom_state (range, TRUE); } } static void gtk_range_multipress_gesture_pressed (GtkGestureMultiPress *gesture, guint n_press, gdouble x, gdouble y, GtkRange *range) { GtkWidget *widget = GTK_WIDGET (range); GtkRangePrivate *priv = gtk_range_get_instance_private (range); GdkDevice *source_device; GdkEventSequence *sequence; const GdkEvent *event; GdkInputSource source; gboolean primary_warps; gboolean shift_pressed; guint button; GdkModifierType state_mask; GtkWidget *mouse_location; if (!gtk_widget_has_focus (widget)) gtk_widget_grab_focus (widget); sequence = gtk_gesture_single_get_current_sequence (GTK_GESTURE_SINGLE (gesture)); button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture)); event = gtk_gesture_get_last_event (GTK_GESTURE (gesture), sequence); gdk_event_get_state (event, &state_mask); shift_pressed = (state_mask & GDK_SHIFT_MASK) != 0; source_device = gdk_event_get_source_device ((GdkEvent *) event); source = gdk_device_get_source (source_device); g_object_get (gtk_widget_get_settings (widget), "gtk-primary-button-warps-slider", &primary_warps, NULL); mouse_location = gtk_widget_pick (widget, x, y, 0); /* For the purposes of this function, we ignore fill and highlight and * handle them like the trough */ if (mouse_location == priv->fill_widget || mouse_location == priv->highlight_widget) mouse_location = priv->trough_widget; if (mouse_location == priv->slider_widget && gdk_event_triggers_context_menu (event)) { gboolean handled; gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED); g_signal_emit_by_name (widget, "popup-menu", &handled); return; } if (mouse_location == priv->slider_widget) { /* Shift-click in the slider = fine adjustment */ if (shift_pressed) update_zoom_state (range, TRUE); update_initial_slider_position (range, x, y); range_grab_add (range, priv->slider_widget); } else if (mouse_location == priv->trough_widget && (source == GDK_SOURCE_TOUCHSCREEN || (primary_warps && !shift_pressed && button == GDK_BUTTON_PRIMARY) || (!primary_warps && shift_pressed && button == GDK_BUTTON_PRIMARY) || (!primary_warps && button == GDK_BUTTON_MIDDLE))) { int slider_range_x, slider_range_y; graphene_rect_t slider_bounds; gtk_widget_translate_coordinates (priv->trough_widget, widget, priv->slider_x, priv->slider_y, &slider_range_x, &slider_range_y); /* If we aren't fixed, center on the slider. I.e. if this is not a scale... */ if (!priv->slider_size_fixed && gtk_widget_compute_bounds (priv->slider_widget, priv->slider_widget, &slider_bounds)) { slider_range_x += (slider_bounds.size.width / 2); slider_range_y += (slider_bounds.size.height / 2); } update_initial_slider_position (range, slider_range_x, slider_range_y); range_grab_add (range, priv->slider_widget); update_slider_position (range, x, y); } else if (mouse_location == priv->trough_widget && ((primary_warps && shift_pressed && button == GDK_BUTTON_PRIMARY) || (!primary_warps && !shift_pressed && button == GDK_BUTTON_PRIMARY) || (primary_warps && button == GDK_BUTTON_MIDDLE))) { /* jump by pages */ GtkScrollType scroll; gdouble click_value; click_value = coord_to_value (range, priv->orientation == GTK_ORIENTATION_VERTICAL ? y : x); priv->trough_click_forward = click_value > gtk_adjustment_get_value (priv->adjustment); range_grab_add (range, priv->trough_widget); scroll = range_get_scroll_for_grab (range); gtk_range_add_step_timer (range, scroll); } else if (mouse_location == priv->trough_widget && button == GDK_BUTTON_SECONDARY) { /* autoscroll */ gdouble click_value; click_value = coord_to_value (range, priv->orientation == GTK_ORIENTATION_VERTICAL ? y : x); priv->trough_click_forward = click_value > gtk_adjustment_get_value (priv->adjustment); range_grab_add (range, priv->trough_widget); remove_autoscroll (range); priv->autoscroll_mode = priv->trough_click_forward ? GTK_SCROLL_END : GTK_SCROLL_START; add_autoscroll (range); } if (priv->grab_location == priv->slider_widget); /* leave it to ::drag-begin to claim the sequence */ else if (priv->grab_location != NULL) gtk_gesture_set_state (GTK_GESTURE (gesture), GTK_EVENT_SEQUENCE_CLAIMED); } static void gtk_range_multipress_gesture_released (GtkGestureMultiPress *gesture, guint n_press, gdouble x, gdouble y, GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); priv->in_drag = FALSE; stop_scrolling (range); } /* During a slide, move the slider as required given new mouse position */ static void update_slider_position (GtkRange *range, gint mouse_x, gint mouse_y) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); graphene_rect_t trough_bounds; gdouble delta; gdouble c; gdouble new_value; gboolean handled; gdouble next_value; gdouble mark_value; gdouble mark_delta; gdouble zoom; gint i; gtk_widget_translate_coordinates (GTK_WIDGET (range), priv->trough_widget, mouse_x, mouse_y, &mouse_x, &mouse_y); if (priv->zoom && gtk_widget_compute_bounds (priv->trough_widget, priv->trough_widget, &trough_bounds)) { zoom = MIN(1.0, (priv->orientation == GTK_ORIENTATION_VERTICAL ? trough_bounds.size.height : trough_bounds.size.width) / (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_lower (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment))); /* the above is ineffective for scales, so just set a zoom factor */ if (zoom == 1.0) zoom = 0.25; } else zoom = 1.0; /* recalculate the initial position from the current position */ if (priv->slide_initial_slider_position == -1) { graphene_rect_t slider_bounds; if (!gtk_widget_compute_bounds (priv->slider_widget, GTK_WIDGET (range), &slider_bounds)) graphene_rect_init (&slider_bounds, 0, 0, 0, 0); if (priv->orientation == GTK_ORIENTATION_VERTICAL) priv->slide_initial_slider_position = (zoom * (mouse_y - priv->slide_initial_coordinate_delta) - slider_bounds.origin.y) / (zoom - 1.0); else priv->slide_initial_slider_position = (zoom * (mouse_x - priv->slide_initial_coordinate_delta) - slider_bounds.origin.x) / (zoom - 1.0); } if (priv->orientation == GTK_ORIENTATION_VERTICAL) delta = mouse_y - (priv->slide_initial_coordinate_delta + priv->slide_initial_slider_position); else delta = mouse_x - (priv->slide_initial_coordinate_delta + priv->slide_initial_slider_position); c = priv->slide_initial_slider_position + zoom * delta; new_value = coord_to_value (range, c); next_value = coord_to_value (range, c + 1); mark_delta = fabs (next_value - new_value); for (i = 0; i < priv->n_marks; i++) { mark_value = priv->marks[i]; if (fabs (gtk_adjustment_get_value (priv->adjustment) - mark_value) < 3 * mark_delta) { if (fabs (new_value - mark_value) < MARK_SNAP_LENGTH * mark_delta) { new_value = mark_value; break; } } } g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, new_value, &handled); } static void remove_autoscroll (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); if (priv->autoscroll_id) { gtk_widget_remove_tick_callback (GTK_WIDGET (range), priv->autoscroll_id); priv->autoscroll_id = 0; } /* unset initial position so it can be calculated */ priv->slide_initial_slider_position = -1; priv->autoscroll_mode = GTK_SCROLL_NONE; } static gboolean autoscroll_cb (GtkWidget *widget, GdkFrameClock *frame_clock, gpointer data) { GtkRange *range = GTK_RANGE (data); GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkAdjustment *adj = priv->adjustment; gdouble increment; gdouble value; gboolean handled; gdouble step, page; step = gtk_adjustment_get_step_increment (adj); page = gtk_adjustment_get_page_increment (adj); switch ((guint) priv->autoscroll_mode) { case GTK_SCROLL_STEP_FORWARD: increment = step / AUTOSCROLL_FACTOR; break; case GTK_SCROLL_PAGE_FORWARD: increment = page / AUTOSCROLL_FACTOR; break; case GTK_SCROLL_STEP_BACKWARD: increment = - step / AUTOSCROLL_FACTOR; break; case GTK_SCROLL_PAGE_BACKWARD: increment = - page / AUTOSCROLL_FACTOR; break; case GTK_SCROLL_START: case GTK_SCROLL_END: { gdouble x, y; gdouble distance, t; /* Vary scrolling speed from slow (ie step) to fast (2 * page), * based on the distance of the pointer from the widget. We start * speeding up if the pointer moves at least 20 pixels away, and * we reach maximum speed when it is 220 pixels away. */ if (!gtk_gesture_drag_get_offset (GTK_GESTURE_DRAG (priv->drag_gesture), &x, &y)) { x = 0.0; y = 0.0; } if (gtk_orientable_get_orientation (GTK_ORIENTABLE (range)) == GTK_ORIENTATION_HORIZONTAL) distance = fabs (y); else distance = fabs (x); distance = CLAMP (distance - 20, 0.0, 200); t = distance / 100.0; step = (1 - t) * step + t * page; if (priv->autoscroll_mode == GTK_SCROLL_END) increment = step / AUTOSCROLL_FACTOR; else increment = - step / AUTOSCROLL_FACTOR; } break; default: g_assert_not_reached (); break; } value = gtk_adjustment_get_value (adj); value += increment; g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, value, &handled); return G_SOURCE_CONTINUE; } static void add_autoscroll (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); if (priv->autoscroll_id != 0 || priv->autoscroll_mode == GTK_SCROLL_NONE) return; priv->autoscroll_id = gtk_widget_add_tick_callback (GTK_WIDGET (range), autoscroll_cb, range, NULL); } static void stop_scrolling (GtkRange *range) { range_grab_remove (range); gtk_range_remove_step_timer (range); remove_autoscroll (range); } static gboolean gtk_range_scroll_controller_scroll (GtkEventControllerScroll *scroll, gdouble dx, gdouble dy, GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gdouble scroll_unit, delta; gboolean handled; GtkOrientation move_orientation; #ifdef GDK_WINDOWING_QUARTZ scroll_unit = 1; #else scroll_unit = gtk_adjustment_get_page_increment (priv->adjustment); #endif if (priv->orientation == GTK_ORIENTATION_HORIZONTAL && dx != 0) { move_orientation = GTK_ORIENTATION_HORIZONTAL; delta = dx * scroll_unit; } else { move_orientation = GTK_ORIENTATION_VERTICAL; delta = dy * scroll_unit; } if (delta != 0 && should_invert_move (range, move_orientation)) delta = - delta; g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, gtk_adjustment_get_value (priv->adjustment) + delta, &handled); return GDK_EVENT_STOP; } static void update_autoscroll_mode (GtkRange *range, int mouse_x, int mouse_y) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GtkScrollType mode = GTK_SCROLL_NONE; if (priv->zoom) { int width, height; gint size, pos; width = gtk_widget_get_width (GTK_WIDGET (range)); height = gtk_widget_get_height (GTK_WIDGET (range)); if (priv->orientation == GTK_ORIENTATION_VERTICAL) { size = height; pos = mouse_y; } else { size = width; pos = mouse_x; } if (pos < SCROLL_EDGE_SIZE) mode = priv->inverted ? GTK_SCROLL_STEP_FORWARD : GTK_SCROLL_STEP_BACKWARD; else if (pos > (size - SCROLL_EDGE_SIZE)) mode = priv->inverted ? GTK_SCROLL_STEP_BACKWARD : GTK_SCROLL_STEP_FORWARD; } if (mode != priv->autoscroll_mode) { remove_autoscroll (range); priv->autoscroll_mode = mode; add_autoscroll (range); } } static void gtk_range_drag_gesture_update (GtkGestureDrag *gesture, gdouble offset_x, gdouble offset_y, GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gdouble start_x, start_y; if (priv->grab_location == priv->slider_widget) { int mouse_x, mouse_y; gtk_gesture_drag_get_start_point (gesture, &start_x, &start_y); mouse_x = start_x + offset_x; mouse_y = start_y + offset_y; priv->in_drag = TRUE; update_autoscroll_mode (range, mouse_x, mouse_y); if (priv->autoscroll_mode == GTK_SCROLL_NONE) update_slider_position (range, mouse_x, mouse_y); } } static void gtk_range_drag_gesture_begin (GtkGestureDrag *gesture, gdouble offset_x, gdouble offset_y, GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); if (priv->grab_location == priv->slider_widget) gtk_gesture_set_state (priv->drag_gesture, GTK_EVENT_SEQUENCE_CLAIMED); } static void gtk_range_adjustment_changed (GtkAdjustment *adjustment, gpointer data) { GtkRange *range = GTK_RANGE (data); gtk_range_calc_slider (range); /* Note that we don't round off to priv->round_digits here. * that's because it's really broken to change a value * in response to a change signal on that value; round_digits * is therefore defined to be a filter on what the GtkRange * can input into the adjustment, not a filter that the GtkRange * will enforce on the adjustment. */ } static void gtk_range_adjustment_value_changed (GtkAdjustment *adjustment, gpointer data) { GtkRange *range = GTK_RANGE (data); GtkRangePrivate *priv = gtk_range_get_instance_private (range); /* Note that we don't round off to priv->round_digits here. * that's because it's really broken to change a value * in response to a change signal on that value; round_digits * is therefore defined to be a filter on what the GtkRange * can input into the adjustment, not a filter that the GtkRange * will enforce on the adjustment. */ g_signal_emit (range, signals[VALUE_CHANGED], 0); gtk_widget_queue_allocate (priv->trough_widget); } static void apply_marks (GtkRange *range, gdouble oldval, gdouble *newval) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gint i; gdouble mark; for (i = 0; i < priv->n_marks; i++) { mark = priv->marks[i]; if ((oldval < mark && mark < *newval) || (oldval > mark && mark > *newval)) { *newval = mark; return; } } } static void step_back (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gdouble newval; gboolean handled; newval = gtk_adjustment_get_value (priv->adjustment) - gtk_adjustment_get_step_increment (priv->adjustment); apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval); g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_STEP_BACKWARD, newval, &handled); } static void step_forward (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gdouble newval; gboolean handled; newval = gtk_adjustment_get_value (priv->adjustment) + gtk_adjustment_get_step_increment (priv->adjustment); apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval); g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_STEP_FORWARD, newval, &handled); } static void page_back (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gdouble newval; gboolean handled; newval = gtk_adjustment_get_value (priv->adjustment) - gtk_adjustment_get_page_increment (priv->adjustment); apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval); g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_PAGE_BACKWARD, newval, &handled); } static void page_forward (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gdouble newval; gboolean handled; newval = gtk_adjustment_get_value (priv->adjustment) + gtk_adjustment_get_page_increment (priv->adjustment); apply_marks (range, gtk_adjustment_get_value (priv->adjustment), &newval); g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_PAGE_FORWARD, newval, &handled); } static void scroll_begin (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gboolean handled; g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_START, gtk_adjustment_get_lower (priv->adjustment), &handled); } static void scroll_end (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gdouble newval; gboolean handled; newval = gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment); g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_END, newval, &handled); } static gboolean gtk_range_scroll (GtkRange *range, GtkScrollType scroll) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gdouble old_value = gtk_adjustment_get_value (priv->adjustment); switch (scroll) { case GTK_SCROLL_STEP_LEFT: if (should_invert_move (range, GTK_ORIENTATION_HORIZONTAL)) step_forward (range); else step_back (range); break; case GTK_SCROLL_STEP_UP: if (should_invert_move (range, GTK_ORIENTATION_VERTICAL)) step_forward (range); else step_back (range); break; case GTK_SCROLL_STEP_RIGHT: if (should_invert_move (range, GTK_ORIENTATION_HORIZONTAL)) step_back (range); else step_forward (range); break; case GTK_SCROLL_STEP_DOWN: if (should_invert_move (range, GTK_ORIENTATION_VERTICAL)) step_back (range); else step_forward (range); break; case GTK_SCROLL_STEP_BACKWARD: step_back (range); break; case GTK_SCROLL_STEP_FORWARD: step_forward (range); break; case GTK_SCROLL_PAGE_LEFT: if (should_invert_move (range, GTK_ORIENTATION_HORIZONTAL)) page_forward (range); else page_back (range); break; case GTK_SCROLL_PAGE_UP: if (should_invert_move (range, GTK_ORIENTATION_VERTICAL)) page_forward (range); else page_back (range); break; case GTK_SCROLL_PAGE_RIGHT: if (should_invert_move (range, GTK_ORIENTATION_HORIZONTAL)) page_back (range); else page_forward (range); break; case GTK_SCROLL_PAGE_DOWN: if (should_invert_move (range, GTK_ORIENTATION_VERTICAL)) page_back (range); else page_forward (range); break; case GTK_SCROLL_PAGE_BACKWARD: page_back (range); break; case GTK_SCROLL_PAGE_FORWARD: page_forward (range); break; case GTK_SCROLL_START: scroll_begin (range); break; case GTK_SCROLL_END: scroll_end (range); break; case GTK_SCROLL_JUMP: /* Used by CList, range doesn't use it. */ break; case GTK_SCROLL_NONE: default: break; } return gtk_adjustment_get_value (priv->adjustment) != old_value; } static void gtk_range_move_slider (GtkRange *range, GtkScrollType scroll) { if (! gtk_range_scroll (range, scroll)) gtk_widget_error_bell (GTK_WIDGET (range)); } static void gtk_range_compute_slider_position (GtkRange *range, gdouble adjustment_value, GdkRectangle *slider_rect) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); int trough_width, trough_height; int slider_width, slider_height, min_slider_size; const double upper = gtk_adjustment_get_upper (priv->adjustment); const double lower = gtk_adjustment_get_lower (priv->adjustment); const double page_size = gtk_adjustment_get_page_size (priv->adjustment); gtk_widget_measure (priv->slider_widget, GTK_ORIENTATION_HORIZONTAL, -1, &slider_width, NULL, NULL, NULL); gtk_widget_measure (priv->slider_widget, GTK_ORIENTATION_VERTICAL, slider_width, &slider_height, NULL, NULL, NULL); trough_width = gtk_widget_get_width (priv->trough_widget); trough_height = gtk_widget_get_height (priv->trough_widget); if (priv->orientation == GTK_ORIENTATION_VERTICAL) { gint y, bottom, top, height; /* Slider fits into the trough, with stepper_spacing on either side, * and the size/position based on the adjustment or fixed, depending. */ slider_rect->x = (int) floor ((trough_width - slider_width) / 2); slider_rect->width = slider_width; min_slider_size = slider_height; /* Compute slider position/length */ top = 0; bottom = top + trough_height; /* slider height is the fraction (page_size / * total_adjustment_range) times the trough height in pixels */ if (upper - lower != 0) height = (bottom - top) * (page_size / (upper - lower)); else height = min_slider_size; if (height < min_slider_size || priv->slider_size_fixed) height = min_slider_size; height = MIN (height, trough_height); y = top; if (upper - lower - page_size != 0) y += (bottom - top - height) * ((adjustment_value - lower) / (upper - lower - page_size)); y = CLAMP (y, top, bottom); if (should_invert (range)) y = bottom - (y - top + height); slider_rect->y = y; slider_rect->height = height; } else { gint x, left, right, width; /* Slider fits into the trough, with stepper_spacing on either side, * and the size/position based on the adjustment or fixed, depending. */ slider_rect->y = (int) floor ((trough_height - slider_height) / 2); slider_rect->height = slider_height; min_slider_size = slider_width; /* Compute slider position/length */ left = 0; right = left + trough_width; /* slider width is the fraction (page_size / * total_adjustment_range) times the trough width in pixels */ if (upper - lower != 0) width = (right - left) * (page_size / (upper - lower)); else width = min_slider_size; if (width < min_slider_size || priv->slider_size_fixed) width = min_slider_size; width = MIN (width, trough_width); x = left; if (upper - lower - page_size != 0) x += (right - left - width) * ((adjustment_value - lower) / (upper - lower - page_size)); x = CLAMP (x, left, right); if (should_invert (range)) x = right - (x - left + width); slider_rect->x = x; slider_rect->width = width; } } static void gtk_range_calc_slider (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gboolean visible; if (GTK_IS_SCALE (range) && gtk_adjustment_get_upper (priv->adjustment) == gtk_adjustment_get_lower (priv->adjustment)) visible = FALSE; else visible = TRUE; gtk_widget_set_visible (priv->slider_widget, visible); gtk_widget_queue_allocate (priv->trough_widget); } static void gtk_range_calc_marks (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); GdkRectangle slider; gint i; for (i = 0; i < priv->n_marks; i++) { gtk_range_compute_slider_position (range, priv->marks[i], &slider); gtk_widget_translate_coordinates (priv->trough_widget, GTK_WIDGET (range), slider.x, slider.y, &slider.x, &slider.y); if (priv->orientation == GTK_ORIENTATION_HORIZONTAL) priv->mark_pos[i] = slider.x + slider.width / 2; else priv->mark_pos[i] = slider.y + slider.height / 2; } } static gboolean gtk_range_real_change_value (GtkRange *range, GtkScrollType scroll, gdouble value) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); /* potentially adjust the bounds _before_ we clamp */ g_signal_emit (range, signals[ADJUST_BOUNDS], 0, value); if (priv->restrict_to_fill_level) value = MIN (value, MAX (gtk_adjustment_get_lower (priv->adjustment), priv->fill_level)); value = CLAMP (value, gtk_adjustment_get_lower (priv->adjustment), (gtk_adjustment_get_upper (priv->adjustment) - gtk_adjustment_get_page_size (priv->adjustment))); if (priv->round_digits >= 0) { gdouble power; gint i; i = priv->round_digits; power = 1; while (i--) power *= 10; value = floor ((value * power) + 0.5) / power; } if (priv->in_drag || priv->autoscroll_id) gtk_adjustment_set_value (priv->adjustment, value); else gtk_adjustment_animate_to_value (priv->adjustment, value); return FALSE; } struct _GtkRangeStepTimer { guint timeout_id; GtkScrollType step; }; static gboolean second_timeout (gpointer data) { GtkRange *range = GTK_RANGE (data); GtkRangePrivate *priv = gtk_range_get_instance_private (range); gtk_range_scroll (range, priv->timer->step); return G_SOURCE_CONTINUE; } static gboolean initial_timeout (gpointer data) { GtkRange *range = GTK_RANGE (data); GtkRangePrivate *priv = gtk_range_get_instance_private (range); priv->timer->timeout_id = g_timeout_add (TIMEOUT_REPEAT, second_timeout, range); g_source_set_name_by_id (priv->timer->timeout_id, "[gtk] second_timeout"); return G_SOURCE_REMOVE; } static void gtk_range_add_step_timer (GtkRange *range, GtkScrollType step) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_if_fail (priv->timer == NULL); g_return_if_fail (step != GTK_SCROLL_NONE); priv->timer = g_new (GtkRangeStepTimer, 1); priv->timer->timeout_id = g_timeout_add (TIMEOUT_INITIAL, initial_timeout, range); g_source_set_name_by_id (priv->timer->timeout_id, "[gtk] initial_timeout"); priv->timer->step = step; gtk_range_scroll (range, priv->timer->step); } static void gtk_range_remove_step_timer (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); if (priv->timer) { if (priv->timer->timeout_id != 0) g_source_remove (priv->timer->timeout_id); g_free (priv->timer); priv->timer = NULL; } } void _gtk_range_set_has_origin (GtkRange *range, gboolean has_origin) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); if (has_origin) { priv->highlight_widget = gtk_gizmo_new ("highlight", NULL, NULL, NULL, NULL); gtk_widget_insert_before (priv->highlight_widget, priv->trough_widget, priv->slider_widget); update_highlight_position (range); } else { g_clear_pointer (&priv->highlight_widget, gtk_widget_unparent); } } gboolean _gtk_range_get_has_origin (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); return priv->highlight_widget != NULL; } void _gtk_range_set_stop_values (GtkRange *range, gdouble *values, gint n_values) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gint i; g_free (priv->marks); priv->marks = g_new (gdouble, n_values); g_free (priv->mark_pos); priv->mark_pos = g_new (gint, n_values); priv->n_marks = n_values; for (i = 0; i < n_values; i++) priv->marks[i] = values[i]; gtk_range_calc_marks (range); } gint _gtk_range_get_stop_positions (GtkRange *range, gint **values) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); gtk_range_calc_marks (range); if (values) *values = g_memdup (priv->mark_pos, priv->n_marks * sizeof (gint)); return priv->n_marks; } /** * gtk_range_set_round_digits: * @range: a #GtkRange * @round_digits: the precision in digits, or -1 * * Sets the number of digits to round the value to when * it changes. See #GtkRange::change-value. */ void gtk_range_set_round_digits (GtkRange *range, gint round_digits) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_if_fail (GTK_IS_RANGE (range)); g_return_if_fail (round_digits >= -1); if (priv->round_digits != round_digits) { priv->round_digits = round_digits; g_object_notify_by_pspec (G_OBJECT (range), properties[PROP_ROUND_DIGITS]); } } /** * gtk_range_get_round_digits: * @range: a #GtkRange * * Gets the number of digits to round the value to when * it changes. See #GtkRange::change-value. * * Returns: the number of digits to round to */ gint gtk_range_get_round_digits (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); g_return_val_if_fail (GTK_IS_RANGE (range), -1); return priv->round_digits; } GtkWidget * gtk_range_get_slider_widget (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); return priv->slider_widget; } GtkWidget * gtk_range_get_trough_widget (GtkRange *range) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); return priv->trough_widget; } void gtk_range_start_autoscroll (GtkRange *range, GtkScrollType scroll_type) { GtkRangePrivate *priv = gtk_range_get_instance_private (range); remove_autoscroll (range); priv->autoscroll_mode = scroll_type; add_autoscroll (range); } void gtk_range_stop_autoscroll (GtkRange *range) { remove_autoscroll (range); }