/* GTK - The GIMP Toolkit * Copyright (C) 2005 Ronald S. Bultje * Copyright (C) 2006, 2007 Christian Persch * Copyright (C) 2006 Jan Arne Petersen * Copyright (C) 2005-2007 Red Hat, Inc. * Copyright (C) 2014 Red Hat, Inc. * * Authors: * - Ronald S. Bultje * - Bastien Nocera * - Jan Arne Petersen * - Christian Persch * * 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 2007. 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 "gtkscalebutton.h" #include "gtkadjustment.h" #include "gtkbox.h" #include "gtkbuttonprivate.h" #include "gtktogglebutton.h" #include "gtkeventcontrollerscroll.h" #include "gtkframe.h" #include "gtkgesture.h" #include "gtkintl.h" #include "gtkmain.h" #include "gtkmarshalers.h" #include "gtkorientable.h" #include "gtkpopover.h" #include "gtkprivate.h" #include "gtkrangeprivate.h" #include "gtkscale.h" #include "gtktypebuiltins.h" #include "gtkwidgetprivate.h" #include "gtkwindowprivate.h" #include "gtknative.h" #include #include #include /** * SECTION:gtkscalebutton * @Short_description: A button which pops up a scale * @Title: GtkScaleButton * * #GtkScaleButton provides a button which pops up a scale widget. * This kind of widget is commonly used for volume controls in multimedia * applications, and GTK provides a #GtkVolumeButton subclass that * is tailored for this use case. * * # CSS nodes * * GtkScaleButton has a single CSS node with name button. To differentiate * it from a plain #GtkButton, it gets the .scale style class. */ #define SCALE_SIZE 100 enum { VALUE_CHANGED, POPUP, POPDOWN, LAST_SIGNAL }; enum { PROP_0, PROP_ORIENTATION, PROP_VALUE, PROP_SIZE, PROP_ADJUSTMENT, PROP_ICONS }; typedef struct { GtkWidget *button; GtkWidget *plus_button; GtkWidget *minus_button; GtkWidget *dock; GtkWidget *box; GtkWidget *scale; GtkWidget *active_button; GtkOrientation orientation; GtkOrientation applied_orientation; guint autoscroll_timeout; GtkScrollType autoscroll_step; gboolean autoscrolling; char **icon_list; GtkAdjustment *adjustment; /* needed because it must be settable in init() */ } GtkScaleButtonPrivate; static void gtk_scale_button_constructed (GObject *object); static void gtk_scale_button_dispose (GObject *object); static void gtk_scale_button_finalize (GObject *object); static void gtk_scale_button_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_scale_button_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gtk_scale_button_size_allocate (GtkWidget *widget, int width, int height, int baseline); static void gtk_scale_button_measure (GtkWidget *widget, GtkOrientation orientation, int for_size, int *minimum, int *natural, int *minimum_baseline, int *natural_baseline); static void gtk_scale_button_set_orientation_private (GtkScaleButton *button, GtkOrientation orientation); static void gtk_scale_button_popup (GtkWidget *widget); static void gtk_scale_button_popdown (GtkWidget *widget); static void cb_button_clicked (GtkWidget *button, gpointer user_data); static void gtk_scale_button_update_icon (GtkScaleButton *button); static void cb_scale_value_changed (GtkRange *range, gpointer user_data); static void cb_popup_mapped (GtkWidget *popup, gpointer user_data); static gboolean gtk_scale_button_scroll_controller_scroll (GtkEventControllerScroll *scroll, double dx, double dy, GtkScaleButton *button); G_DEFINE_TYPE_WITH_CODE (GtkScaleButton, gtk_scale_button, GTK_TYPE_WIDGET, G_ADD_PRIVATE (GtkScaleButton) G_IMPLEMENT_INTERFACE (GTK_TYPE_ORIENTABLE, NULL)) static guint signals[LAST_SIGNAL] = { 0, }; static void gtk_scale_button_class_init (GtkScaleButtonClass *klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass); gobject_class->constructed = gtk_scale_button_constructed; gobject_class->finalize = gtk_scale_button_finalize; gobject_class->dispose = gtk_scale_button_dispose; gobject_class->set_property = gtk_scale_button_set_property; gobject_class->get_property = gtk_scale_button_get_property; widget_class->measure = gtk_scale_button_measure; widget_class->size_allocate = gtk_scale_button_size_allocate; widget_class->focus = gtk_widget_focus_child; widget_class->grab_focus = gtk_widget_grab_focus_child; /** * GtkScaleButton:orientation: * * The orientation of the #GtkScaleButton's popup window. * * Note that #GtkScaleButton implements the #GtkOrientable interface * which has its own @orientation property. However, we redefine the * property here in order to override its default horizontal orientation. **/ g_object_class_override_property (gobject_class, PROP_ORIENTATION, "orientation"); g_object_class_install_property (gobject_class, PROP_VALUE, g_param_spec_double ("value", P_("Value"), P_("The value of the scale"), -G_MAXDOUBLE, G_MAXDOUBLE, 0, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY)); g_object_class_install_property (gobject_class, PROP_ADJUSTMENT, g_param_spec_object ("adjustment", P_("Adjustment"), P_("The GtkAdjustment that contains the current value of this scale button object"), GTK_TYPE_ADJUSTMENT, GTK_PARAM_READWRITE)); /** * GtkScaleButton:icons: * * The names of the icons to be used by the scale button. * The first item in the array will be used in the button * when the current value is the lowest value, the second * item for the highest value. All the subsequent icons will * be used for all the other values, spread evenly over the * range of values. * * If there's only one icon name in the @icons array, it will * be used for all the values. If only two icon names are in * the @icons array, the first one will be used for the bottom * 50% of the scale, and the second one for the top 50%. * * It is recommended to use at least 3 icons so that the * #GtkScaleButton reflects the current value of the scale * better for the users. */ g_object_class_install_property (gobject_class, PROP_ICONS, g_param_spec_boxed ("icons", P_("Icons"), P_("List of icon names"), G_TYPE_STRV, GTK_PARAM_READWRITE)); /** * GtkScaleButton::value-changed: * @button: the object which received the signal * @value: the new value * * The ::value-changed signal is emitted when the value field has * changed. */ signals[VALUE_CHANGED] = g_signal_new (I_("value-changed"), G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkScaleButtonClass, value_changed), NULL, NULL, NULL, G_TYPE_NONE, 1, G_TYPE_DOUBLE); /** * GtkScaleButton::popup: * @button: the object which received the signal * * The ::popup signal is a * [keybinding signal][GtkSignalAction] * which gets emitted to popup the scale widget. * * The default bindings for this signal are Space, Enter and Return. */ signals[POPUP] = g_signal_new_class_handler (I_("popup"), G_OBJECT_CLASS_TYPE (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_CALLBACK (gtk_scale_button_popup), NULL, NULL, NULL, G_TYPE_NONE, 0); /** * GtkScaleButton::popdown: * @button: the object which received the signal * * The ::popdown signal is a * [keybinding signal][GtkSignalAction] * which gets emitted to popdown the scale widget. * * The default binding for this signal is Escape. */ signals[POPDOWN] = g_signal_new_class_handler (I_("popdown"), G_OBJECT_CLASS_TYPE (klass), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_CALLBACK (gtk_scale_button_popdown), NULL, NULL, NULL, G_TYPE_NONE, 0); /* Key bindings */ gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_space, 0, "popup", NULL); gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_KP_Space, 0, "popup", NULL); gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_Return, 0, "popup", NULL); gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_ISO_Enter, 0, "popup", NULL); gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_KP_Enter, 0, "popup", NULL); gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_Escape, 0, "popdown", NULL); /* Bind class to template */ gtk_widget_class_set_template_from_resource (widget_class, "/org/gtk/libgtk/ui/gtkscalebutton.ui"); gtk_widget_class_bind_template_child_private (widget_class, GtkScaleButton, button); gtk_widget_class_bind_template_child_internal_private (widget_class, GtkScaleButton, plus_button); gtk_widget_class_bind_template_child_internal_private (widget_class, GtkScaleButton, minus_button); gtk_widget_class_bind_template_child_private (widget_class, GtkScaleButton, dock); gtk_widget_class_bind_template_child_private (widget_class, GtkScaleButton, box); gtk_widget_class_bind_template_child_private (widget_class, GtkScaleButton, scale); gtk_widget_class_bind_template_callback (widget_class, cb_button_clicked); gtk_widget_class_bind_template_callback (widget_class, cb_scale_value_changed); gtk_widget_class_bind_template_callback (widget_class, cb_popup_mapped); gtk_widget_class_set_css_name (widget_class, I_("scalebutton")); } static gboolean start_autoscroll (gpointer data) { GtkScaleButton *button = data; GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); gtk_range_start_autoscroll (GTK_RANGE (priv->scale), priv->autoscroll_step); priv->autoscrolling = TRUE; priv->autoscroll_timeout = 0; return G_SOURCE_REMOVE; } static void button_pressed_cb (GtkGesture *gesture, int n_press, double x, double y, GtkScaleButton *button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); GtkWidget *widget; widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture)); if (widget == priv->plus_button) priv->autoscroll_step = GTK_SCROLL_PAGE_FORWARD; else priv->autoscroll_step = GTK_SCROLL_PAGE_BACKWARD; priv->autoscroll_timeout = g_timeout_add (200, start_autoscroll, button); } static void gtk_scale_button_toggled (GtkScaleButton *button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); gboolean active; active = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (priv->button)); if (active) gtk_popover_popup (GTK_POPOVER (priv->dock)); else gtk_popover_popdown (GTK_POPOVER (priv->dock)); } static void gtk_scale_button_closed (GtkScaleButton *button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->button), FALSE); } static void gtk_scale_button_init (GtkScaleButton *button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); GtkEventController *controller; priv->orientation = GTK_ORIENTATION_VERTICAL; priv->applied_orientation = GTK_ORIENTATION_VERTICAL; gtk_widget_init_template (GTK_WIDGET (button)); gtk_widget_set_parent (priv->dock, GTK_WIDGET (button)); /* Need a local reference to the adjustment */ priv->adjustment = gtk_adjustment_new (0, 0, 100, 2, 20, 0); g_object_ref_sink (priv->adjustment); gtk_range_set_adjustment (GTK_RANGE (priv->scale), priv->adjustment); gtk_accessible_update_property (GTK_ACCESSIBLE (button), GTK_ACCESSIBLE_PROPERTY_VALUE_MAX, gtk_adjustment_get_upper (priv->adjustment), GTK_ACCESSIBLE_PROPERTY_VALUE_MIN, gtk_adjustment_get_lower (priv->adjustment), GTK_ACCESSIBLE_PROPERTY_VALUE_NOW, gtk_adjustment_get_value (priv->adjustment), -1); gtk_widget_add_css_class (GTK_WIDGET (button), "scale"); controller = gtk_event_controller_scroll_new (GTK_EVENT_CONTROLLER_SCROLL_VERTICAL); g_signal_connect (controller, "scroll", G_CALLBACK (gtk_scale_button_scroll_controller_scroll), button); gtk_widget_add_controller (GTK_WIDGET (button), controller); g_signal_connect_swapped (priv->dock, "closed", G_CALLBACK (gtk_scale_button_closed), button); g_signal_connect_swapped (priv->button, "toggled", G_CALLBACK (gtk_scale_button_toggled), button); g_signal_connect (gtk_button_get_gesture (GTK_BUTTON (priv->plus_button)), "pressed", G_CALLBACK (button_pressed_cb), button); g_signal_connect (gtk_button_get_gesture (GTK_BUTTON (priv->minus_button)), "pressed", G_CALLBACK (button_pressed_cb), button); } static void gtk_scale_button_constructed (GObject *object) { GtkScaleButton *button = GTK_SCALE_BUTTON (object); G_OBJECT_CLASS (gtk_scale_button_parent_class)->constructed (object); /* set button text and size */ gtk_scale_button_update_icon (button); } static void gtk_scale_button_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkScaleButton *button = GTK_SCALE_BUTTON (object); switch (prop_id) { case PROP_ORIENTATION: gtk_scale_button_set_orientation_private (button, g_value_get_enum (value)); break; case PROP_VALUE: gtk_scale_button_set_value (button, g_value_get_double (value)); break; case PROP_ADJUSTMENT: gtk_scale_button_set_adjustment (button, g_value_get_object (value)); break; case PROP_ICONS: gtk_scale_button_set_icons (button, (const char **)g_value_get_boxed (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_scale_button_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkScaleButton *button = GTK_SCALE_BUTTON (object); GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); switch (prop_id) { case PROP_ORIENTATION: g_value_set_enum (value, priv->orientation); break; case PROP_VALUE: g_value_set_double (value, gtk_scale_button_get_value (button)); break; case PROP_ADJUSTMENT: g_value_set_object (value, gtk_scale_button_get_adjustment (button)); break; case PROP_ICONS: g_value_set_boxed (value, priv->icon_list); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_scale_button_finalize (GObject *object) { GtkScaleButton *button = GTK_SCALE_BUTTON (object); GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); g_clear_pointer (&priv->icon_list, g_strfreev); g_clear_object (&priv->adjustment); g_clear_handle_id (&priv->autoscroll_timeout, g_source_remove); G_OBJECT_CLASS (gtk_scale_button_parent_class)->finalize (object); } static void gtk_scale_button_dispose (GObject *object) { GtkScaleButton *button = GTK_SCALE_BUTTON (object); GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); g_clear_pointer (&priv->dock, gtk_widget_unparent); g_clear_pointer (&priv->button, gtk_widget_unparent); G_OBJECT_CLASS (gtk_scale_button_parent_class)->dispose (object); } /** * gtk_scale_button_new: * @min: the minimum value of the scale (usually 0) * @max: the maximum value of the scale (usually 100) * @step: the stepping of value when a scroll-wheel event, * or up/down arrow event occurs (usually 2) * @icons: (allow-none) (array zero-terminated=1): a %NULL-terminated * array of icon names, or %NULL if you want to set the list * later with gtk_scale_button_set_icons() * * Creates a #GtkScaleButton, with a range between @min and @max, with * a stepping of @step. * * Returns: a new #GtkScaleButton */ GtkWidget * gtk_scale_button_new (double min, double max, double step, const char **icons) { GtkScaleButton *button; GtkAdjustment *adjustment; adjustment = gtk_adjustment_new (min, min, max, step, 10 * step, 0); button = g_object_new (GTK_TYPE_SCALE_BUTTON, "adjustment", adjustment, "icons", icons, NULL); return GTK_WIDGET (button); } /** * gtk_scale_button_get_value: * @button: a #GtkScaleButton * * Gets the current value of the scale button. * * Returns: current value of the scale button */ double gtk_scale_button_get_value (GtkScaleButton * button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), 0); return gtk_adjustment_get_value (priv->adjustment); } /** * gtk_scale_button_set_value: * @button: a #GtkScaleButton * @value: new value of the scale button * * Sets the current value of the scale; if the value is outside * the minimum or maximum range values, it will be clamped to fit * inside them. The scale button emits the #GtkScaleButton::value-changed * signal if the value changes. */ void gtk_scale_button_set_value (GtkScaleButton *button, double value) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); g_return_if_fail (GTK_IS_SCALE_BUTTON (button)); gtk_range_set_value (GTK_RANGE (priv->scale), value); g_object_notify (G_OBJECT (button), "value"); } /** * gtk_scale_button_set_icons: * @button: a #GtkScaleButton * @icons: (array zero-terminated=1): a %NULL-terminated array of icon names * * Sets the icons to be used by the scale button. * For details, see the #GtkScaleButton:icons property. */ void gtk_scale_button_set_icons (GtkScaleButton *button, const char **icons) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); char **tmp; g_return_if_fail (GTK_IS_SCALE_BUTTON (button)); tmp = priv->icon_list; priv->icon_list = g_strdupv ((char **) icons); g_strfreev (tmp); gtk_scale_button_update_icon (button); g_object_notify (G_OBJECT (button), "icons"); } /** * gtk_scale_button_get_adjustment: * @button: a #GtkScaleButton * * Gets the #GtkAdjustment associated with the #GtkScaleButton’s scale. * See gtk_range_get_adjustment() for details. * * Returns: (transfer none): the adjustment associated with the scale */ GtkAdjustment* gtk_scale_button_get_adjustment (GtkScaleButton *button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL); return priv->adjustment; } /** * gtk_scale_button_set_adjustment: * @button: a #GtkScaleButton * @adjustment: a #GtkAdjustment * * Sets the #GtkAdjustment to be used as a model * for the #GtkScaleButton’s scale. * See gtk_range_set_adjustment() for details. */ void gtk_scale_button_set_adjustment (GtkScaleButton *button, GtkAdjustment *adjustment) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); g_return_if_fail (GTK_IS_SCALE_BUTTON (button)); 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_object_unref (priv->adjustment); priv->adjustment = g_object_ref_sink (adjustment); if (priv->scale) gtk_range_set_adjustment (GTK_RANGE (priv->scale), adjustment); g_object_notify (G_OBJECT (button), "adjustment"); gtk_accessible_update_property (GTK_ACCESSIBLE (button), GTK_ACCESSIBLE_PROPERTY_VALUE_MAX, gtk_adjustment_get_upper (adjustment), GTK_ACCESSIBLE_PROPERTY_VALUE_MIN, gtk_adjustment_get_lower (adjustment), GTK_ACCESSIBLE_PROPERTY_VALUE_NOW, gtk_adjustment_get_value (adjustment), -1); } } /** * gtk_scale_button_get_plus_button: * @button: a #GtkScaleButton * * Retrieves the plus button of the #GtkScaleButton. * * Returns: (transfer none) (type Gtk.Button): the plus button of the #GtkScaleButton as a #GtkButton */ GtkWidget * gtk_scale_button_get_plus_button (GtkScaleButton *button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL); return priv->plus_button; } /** * gtk_scale_button_get_minus_button: * @button: a #GtkScaleButton * * Retrieves the minus button of the #GtkScaleButton. * * Returns: (transfer none) (type Gtk.Button): the minus button of the #GtkScaleButton as a #GtkButton */ GtkWidget * gtk_scale_button_get_minus_button (GtkScaleButton *button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL); return priv->minus_button; } /** * gtk_scale_button_get_popup: * @button: a #GtkScaleButton * * Retrieves the popup of the #GtkScaleButton. * * Returns: (transfer none): the popup of the #GtkScaleButton */ GtkWidget * gtk_scale_button_get_popup (GtkScaleButton *button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); g_return_val_if_fail (GTK_IS_SCALE_BUTTON (button), NULL); return priv->dock; } static void gtk_scale_button_set_orientation_private (GtkScaleButton *button, GtkOrientation orientation) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); if (priv->orientation != orientation) { priv->orientation = orientation; g_object_notify (G_OBJECT (button), "orientation"); } } static gboolean gtk_scale_button_scroll_controller_scroll (GtkEventControllerScroll *scroll, double dx, double dy, GtkScaleButton *button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); GtkAdjustment *adjustment; double d; adjustment = priv->adjustment; d = CLAMP (gtk_scale_button_get_value (button) - (dy * gtk_adjustment_get_step_increment (adjustment)), gtk_adjustment_get_lower (adjustment), gtk_adjustment_get_upper (adjustment)); gtk_scale_button_set_value (button, d); return GDK_EVENT_STOP; } /* * button callbacks. */ static void gtk_scale_popup (GtkWidget *widget) { GtkScaleButton *button = GTK_SCALE_BUTTON (widget); GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->button), TRUE); } static void gtk_scale_button_popdown (GtkWidget *widget) { GtkScaleButton *button = GTK_SCALE_BUTTON (widget); GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (priv->button), FALSE); } static void gtk_scale_button_popup (GtkWidget *widget) { gtk_scale_popup (widget); } /* * +/- button callbacks. */ static gboolean button_click (GtkScaleButton *button, GtkWidget *active) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); GtkAdjustment *adjustment = priv->adjustment; gboolean can_continue = TRUE; double val; val = gtk_scale_button_get_value (button); if (active == priv->plus_button) val += gtk_adjustment_get_page_increment (adjustment); else val -= gtk_adjustment_get_page_increment (adjustment); if (val <= gtk_adjustment_get_lower (adjustment)) { can_continue = FALSE; val = gtk_adjustment_get_lower (adjustment); } else if (val > gtk_adjustment_get_upper (adjustment)) { can_continue = FALSE; val = gtk_adjustment_get_upper (adjustment); } gtk_scale_button_set_value (button, val); return can_continue; } static void cb_button_clicked (GtkWidget *widget, gpointer user_data) { GtkScaleButton *button = GTK_SCALE_BUTTON (user_data); GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); if (priv->autoscroll_timeout) { g_source_remove (priv->autoscroll_timeout); priv->autoscroll_timeout = 0; } if (priv->autoscrolling) { gtk_range_stop_autoscroll (GTK_RANGE (priv->scale)); priv->autoscrolling = FALSE; return; } button_click (button, widget); } static void gtk_scale_button_update_icon (GtkScaleButton *button) { GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); GtkAdjustment *adjustment; double value; const char *name; guint num_icons; if (!priv->icon_list || priv->icon_list[0][0] == '\0') { gtk_button_set_icon_name (GTK_BUTTON (priv->button), "image-missing"); return; } num_icons = g_strv_length (priv->icon_list); /* The 1-icon special case */ if (num_icons == 1) { gtk_button_set_icon_name (GTK_BUTTON (priv->button), priv->icon_list[0]); return; } adjustment = priv->adjustment; value = gtk_scale_button_get_value (button); /* The 2-icons special case */ if (num_icons == 2) { double limit; limit = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment)) / 2 + gtk_adjustment_get_lower (adjustment); if (value < limit) name = priv->icon_list[0]; else name = priv->icon_list[1]; gtk_button_set_icon_name (GTK_BUTTON (priv->button), name); return; } /* With 3 or more icons */ if (value == gtk_adjustment_get_lower (adjustment)) { name = priv->icon_list[0]; } else if (value == gtk_adjustment_get_upper (adjustment)) { name = priv->icon_list[1]; } else { double step; guint i; step = (gtk_adjustment_get_upper (adjustment) - gtk_adjustment_get_lower (adjustment)) / (num_icons - 2); i = (guint) ((value - gtk_adjustment_get_lower (adjustment)) / step) + 2; g_assert (i < num_icons); name = priv->icon_list[i]; } gtk_button_set_icon_name (GTK_BUTTON (priv->button), name); } static void cb_scale_value_changed (GtkRange *range, gpointer user_data) { GtkScaleButton *button = user_data; GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); double value; double upper, lower; value = gtk_range_get_value (range); upper = gtk_adjustment_get_upper (priv->adjustment); lower = gtk_adjustment_get_lower (priv->adjustment); gtk_scale_button_update_icon (button); gtk_widget_set_sensitive (priv->plus_button, value < upper); gtk_widget_set_sensitive (priv->minus_button, lower < value); g_signal_emit (button, signals[VALUE_CHANGED], 0, value); g_object_notify (G_OBJECT (button), "value"); gtk_accessible_update_property (GTK_ACCESSIBLE (button), GTK_ACCESSIBLE_PROPERTY_VALUE_NOW, value, -1); } static void cb_popup_mapped (GtkWidget *popup, gpointer user_data) { GtkScaleButton *button = user_data; GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); gtk_widget_grab_focus (priv->scale); } static void gtk_scale_button_measure (GtkWidget *widget, GtkOrientation orientation, int for_size, int *minimum, int *natural, int *minimum_baseline, int *natural_baseline) { GtkScaleButton *button = GTK_SCALE_BUTTON (widget); GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); gtk_widget_measure (priv->button, orientation, for_size, minimum, natural, minimum_baseline, natural_baseline); } static void gtk_scale_button_size_allocate (GtkWidget *widget, int width, int height, int baseline) { GtkScaleButton *button = GTK_SCALE_BUTTON (widget); GtkScaleButtonPrivate *priv = gtk_scale_button_get_instance_private (button); gtk_widget_size_allocate (priv->button, &(GtkAllocation) { 0, 0, width, height }, baseline); gtk_native_check_resize (GTK_NATIVE (priv->dock)); }