/* 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, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /* * 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 #include #include #include "gtkalias.h" #include "gtkintl.h" #include "gtkmain.h" #include "gtkmarshalers.h" #include "gtkrange.h" #include "gtkintl.h" #include "gtkscrollbar.h" #define SCROLL_INITIAL_DELAY 250 /* must hold button this long before ... */ #define SCROLL_LATER_DELAY 100 /* ... it starts repeating at this rate */ #define UPDATE_DELAY 300 /* Delay for queued update */ enum { PROP_0, PROP_UPDATE_POLICY, PROP_ADJUSTMENT, PROP_INVERTED }; enum { VALUE_CHANGED, ADJUST_BOUNDS, MOVE_SLIDER, CHANGE_VALUE, LAST_SIGNAL }; typedef enum { MOUSE_OUTSIDE, MOUSE_STEPPER_A, MOUSE_STEPPER_B, MOUSE_STEPPER_C, MOUSE_STEPPER_D, MOUSE_TROUGH, MOUSE_SLIDER, MOUSE_WIDGET /* inside widget but not in any of the above GUI elements */ } MouseLocation; struct _GtkRangeLayout { /* These are in widget->window coordinates */ GdkRectangle stepper_a; GdkRectangle stepper_b; GdkRectangle stepper_c; GdkRectangle stepper_d; /* The trough rectangle is the area the thumb can slide in, not the * entire range_rect */ GdkRectangle trough; GdkRectangle slider; /* Layout-related state */ MouseLocation mouse_location; /* last mouse coords we got, or -1 if mouse is outside the range */ gint mouse_x; gint mouse_y; /* "grabbed" mouse location, OUTSIDE for no grab */ MouseLocation grab_location; gint grab_button; /* 0 if none */ }; static void gtk_range_class_init (GtkRangeClass *klass); static void gtk_range_init (GtkRange *range); 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_destroy (GtkObject *object); static void gtk_range_finalize (GObject *object); static void gtk_range_size_request (GtkWidget *widget, GtkRequisition *requisition); static void gtk_range_size_allocate (GtkWidget *widget, GtkAllocation *allocation); static void gtk_range_realize (GtkWidget *widget); static void gtk_range_unrealize (GtkWidget *widget); static void gtk_range_map (GtkWidget *widget); static void gtk_range_unmap (GtkWidget *widget); static gint gtk_range_expose (GtkWidget *widget, GdkEventExpose *event); static gint gtk_range_button_press (GtkWidget *widget, GdkEventButton *event); static gint gtk_range_button_release (GtkWidget *widget, GdkEventButton *event); static gint gtk_range_motion_notify (GtkWidget *widget, GdkEventMotion *event); static gint gtk_range_enter_notify (GtkWidget *widget, GdkEventCrossing *event); static gint gtk_range_leave_notify (GtkWidget *widget, GdkEventCrossing *event); static void gtk_range_grab_notify (GtkWidget *widget, gboolean was_grabbed); static void gtk_range_state_changed (GtkWidget *widget, GtkStateType previous_state); static gint gtk_range_scroll_event (GtkWidget *widget, GdkEventScroll *event); static void gtk_range_style_set (GtkWidget *widget, GtkStyle *previous_style); static void update_slider_position (GtkRange *range, gint mouse_x, gint mouse_y); /* Range methods */ static void gtk_range_move_slider (GtkRange *range, GtkScrollType scroll); /* Internals */ static void gtk_range_scroll (GtkRange *range, GtkScrollType scroll); static gboolean gtk_range_update_mouse_location (GtkRange *range); static void gtk_range_calc_layout (GtkRange *range, gdouble adjustment_value); static void gtk_range_get_props (GtkRange *range, gint *slider_width, gint *stepper_size, gint *trough_border, gint *stepper_spacing, gint *arrow_displacement_x, gint *arrow_displacement_y); static void gtk_range_calc_request (GtkRange *range, gint slider_width, gint stepper_size, gint trough_border, gint stepper_spacing, GdkRectangle *range_rect, GtkBorder *border, gint *n_steppers_p, gint *slider_length_p); 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 void gtk_range_reset_update_timer (GtkRange *range); static void gtk_range_remove_update_timer (GtkRange *range); static GdkRectangle* get_area (GtkRange *range, MouseLocation location); static gboolean gtk_range_real_change_value (GtkRange *range, GtkScrollType scroll, gdouble value); static void gtk_range_update_value (GtkRange *range); static GtkWidgetClass *parent_class = NULL; static guint signals[LAST_SIGNAL]; GType gtk_range_get_type (void) { static GType range_type = 0; if (!range_type) { static const GTypeInfo range_info = { sizeof (GtkRangeClass), NULL, /* base_init */ NULL, /* base_finalize */ (GClassInitFunc) gtk_range_class_init, NULL, /* class_finalize */ NULL, /* class_data */ sizeof (GtkRange), 0, /* n_preallocs */ (GInstanceInitFunc) gtk_range_init, NULL, /* value_table */ }; range_type = g_type_register_static (GTK_TYPE_WIDGET, "GtkRange", &range_info, G_TYPE_FLAG_ABSTRACT); } return range_type; } static void gtk_range_class_init (GtkRangeClass *class) { GObjectClass *gobject_class; GtkObjectClass *object_class; GtkWidgetClass *widget_class; gobject_class = G_OBJECT_CLASS (class); object_class = (GtkObjectClass*) class; widget_class = (GtkWidgetClass*) class; parent_class = g_type_class_peek_parent (class); gobject_class->set_property = gtk_range_set_property; gobject_class->get_property = gtk_range_get_property; gobject_class->finalize = gtk_range_finalize; object_class->destroy = gtk_range_destroy; widget_class->size_request = gtk_range_size_request; widget_class->size_allocate = gtk_range_size_allocate; widget_class->realize = gtk_range_realize; widget_class->unrealize = gtk_range_unrealize; widget_class->map = gtk_range_map; widget_class->unmap = gtk_range_unmap; widget_class->expose_event = gtk_range_expose; widget_class->button_press_event = gtk_range_button_press; widget_class->button_release_event = gtk_range_button_release; widget_class->motion_notify_event = gtk_range_motion_notify; widget_class->scroll_event = gtk_range_scroll_event; widget_class->enter_notify_event = gtk_range_enter_notify; widget_class->leave_notify_event = gtk_range_leave_notify; widget_class->grab_notify = gtk_range_grab_notify; widget_class->state_changed = gtk_range_state_changed; widget_class->style_set = gtk_range_style_set; class->move_slider = gtk_range_move_slider; class->change_value = gtk_range_real_change_value; class->slider_detail = "slider"; class->stepper_detail = "stepper"; signals[VALUE_CHANGED] = g_signal_new ("value_changed", G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkRangeClass, value_changed), NULL, NULL, _gtk_marshal_NONE__NONE, G_TYPE_NONE, 0); signals[ADJUST_BOUNDS] = g_signal_new ("adjust_bounds", G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkRangeClass, adjust_bounds), NULL, NULL, _gtk_marshal_VOID__DOUBLE, G_TYPE_NONE, 1, G_TYPE_DOUBLE); signals[MOVE_SLIDER] = g_signal_new ("move_slider", G_TYPE_FROM_CLASS (gobject_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkRangeClass, move_slider), NULL, NULL, _gtk_marshal_VOID__ENUM, G_TYPE_NONE, 1, GTK_TYPE_SCROLL_TYPE); /** * GtkRange::change-value: * @range: the range that received the signal. * @scroll: the type of scroll action that was performed. * @value: the new value resulting from the scroll action. * @returns: %TRUE to prevent other handlers from being invoked for the * signal. %FALSE to propagate the signal further. * * The ::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 ::change-value signal is responsible for clamping the value to * the desired number of digits; the default GTK+ handler clamps the * value based on @range->round_digits. * * It is not possible to use delayed update policies in an overridden * ::change-value handler. * * Since: 2.6 */ signals[CHANGE_VALUE] = g_signal_new ("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_install_property (gobject_class, PROP_UPDATE_POLICY, g_param_spec_enum ("update_policy", P_("Update policy"), P_("How the range should be updated on the screen"), GTK_TYPE_UPDATE_TYPE, GTK_UPDATE_CONTINUOUS, G_PARAM_READWRITE)); 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 range object"), GTK_TYPE_ADJUSTMENT, G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); g_object_class_install_property (gobject_class, PROP_INVERTED, g_param_spec_boolean ("inverted", P_("Inverted"), P_("Invert direction slider moves to increase range value"), FALSE, G_PARAM_READWRITE)); gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("slider_width", P_("Slider Width"), P_("Width of scrollbar or scale thumb"), 0, G_MAXINT, 14, G_PARAM_READABLE)); gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("trough_border", P_("Trough Border"), P_("Spacing between thumb/steppers and outer trough bevel"), 0, G_MAXINT, 1, G_PARAM_READABLE)); gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("stepper_size", P_("Stepper Size"), P_("Length of step buttons at ends"), 0, G_MAXINT, 14, G_PARAM_READABLE)); gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("stepper_spacing", P_("Stepper Spacing"), P_("Spacing between step buttons and thumb"), 0, G_MAXINT, 0, G_PARAM_READABLE)); gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("arrow_displacement_x", P_("Arrow X Displacement"), P_("How far in the x direction to move the arrow when the button is depressed"), G_MININT, G_MAXINT, 0, G_PARAM_READABLE)); gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("arrow_displacement_y", P_("Arrow Y Displacement"), P_("How far in the y direction to move the arrow when the button is depressed"), G_MININT, G_MAXINT, 0, G_PARAM_READABLE)); } static void gtk_range_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkRange *range; range = GTK_RANGE (object); switch (prop_id) { case PROP_UPDATE_POLICY: gtk_range_set_update_policy (range, g_value_get_enum (value)); 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; 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; range = GTK_RANGE (object); switch (prop_id) { case PROP_UPDATE_POLICY: g_value_set_enum (value, range->update_policy); break; case PROP_ADJUSTMENT: g_value_set_object (value, range->adjustment); break; case PROP_INVERTED: g_value_set_boolean (value, range->inverted); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_range_init (GtkRange *range) { GTK_WIDGET_SET_FLAGS (range, GTK_NO_WINDOW); range->adjustment = NULL; range->update_policy = GTK_UPDATE_CONTINUOUS; range->inverted = FALSE; range->flippable = FALSE; range->min_slider_size = 1; range->has_stepper_a = FALSE; range->has_stepper_b = FALSE; range->has_stepper_c = FALSE; range->has_stepper_d = FALSE; range->need_recalc = TRUE; range->round_digits = -1; range->layout = g_new0 (GtkRangeLayout, 1); range->layout->mouse_location = MOUSE_OUTSIDE; range->layout->mouse_x = -1; range->layout->mouse_y = -1; range->layout->grab_location = MOUSE_OUTSIDE; range->layout->grab_button = 0; range->timer = NULL; } /** * 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. * * Return value: a #GtkAdjustment **/ GtkAdjustment* gtk_range_get_adjustment (GtkRange *range) { g_return_val_if_fail (GTK_IS_RANGE (range), NULL); if (!range->adjustment) gtk_range_set_adjustment (range, NULL); return range->adjustment; } /** * gtk_range_set_update_policy: * @range: a #GtkRange * @policy: update policy * * Sets the update policy for the range. #GTK_UPDATE_CONTINUOUS means that * anytime the range slider is moved, the range value will change and the * value_changed signal will be emitted. #GTK_UPDATE_DELAYED means that * the value will be updated after a brief timeout where no slider motion * occurs, so updates are spaced by a short time rather than * continuous. #GTK_UPDATE_DISCONTINUOUS means that the value will only * be updated when the user releases the button and ends the slider * drag operation. * **/ void gtk_range_set_update_policy (GtkRange *range, GtkUpdateType policy) { g_return_if_fail (GTK_IS_RANGE (range)); if (range->update_policy != policy) { range->update_policy = policy; g_object_notify (G_OBJECT (range), "update_policy"); } } /** * gtk_range_get_update_policy: * @range: a #GtkRange * * Gets the update policy of @range. See gtk_range_set_update_policy(). * * Return value: the current update policy **/ GtkUpdateType gtk_range_get_update_policy (GtkRange *range) { g_return_val_if_fail (GTK_IS_RANGE (range), GTK_UPDATE_CONTINUOUS); return range->update_policy; } /** * 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) { g_return_if_fail (GTK_IS_RANGE (range)); if (!adjustment) adjustment = (GtkAdjustment*) 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 (range->adjustment != adjustment) { if (range->adjustment) { g_signal_handlers_disconnect_by_func (range->adjustment, gtk_range_adjustment_changed, range); g_signal_handlers_disconnect_by_func (range->adjustment, gtk_range_adjustment_value_changed, range); g_object_unref (range->adjustment); } range->adjustment = adjustment; g_object_ref (adjustment); gtk_object_sink (GTK_OBJECT (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); g_object_notify (G_OBJECT (range), "adjustment"); } } /** * 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) { g_return_if_fail (GTK_IS_RANGE (range)); setting = setting != FALSE; if (setting != range->inverted) { range->inverted = setting; g_object_notify (G_OBJECT (range), "inverted"); gtk_widget_queue_resize (GTK_WIDGET (range)); } } /** * gtk_range_get_inverted: * @range: a #GtkRange * * Gets the value set by gtk_range_set_inverted(). * * Return value: %TRUE if the range is inverted **/ gboolean gtk_range_get_inverted (GtkRange *range) { g_return_val_if_fail (GTK_IS_RANGE (range), FALSE); return range->inverted; } /** * 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) { g_return_if_fail (GTK_IS_RANGE (range)); range->adjustment->step_increment = step; range->adjustment->page_increment = page; gtk_adjustment_changed (range->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) { gdouble value; g_return_if_fail (GTK_IS_RANGE (range)); g_return_if_fail (min < max); range->adjustment->lower = min; range->adjustment->upper = max; value = CLAMP (range->adjustment->value, range->adjustment->lower, (range->adjustment->upper - range->adjustment->page_size)); gtk_adjustment_set_value (range->adjustment, value); gtk_adjustment_changed (range->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 "value_changed" signal if the value * changes. * **/ void gtk_range_set_value (GtkRange *range, gdouble value) { g_return_if_fail (GTK_IS_RANGE (range)); value = CLAMP (value, range->adjustment->lower, (range->adjustment->upper - range->adjustment->page_size)); gtk_adjustment_set_value (range->adjustment, value); } /** * gtk_range_get_value: * @range: a #GtkRange * * Gets the current value of the range. * * Return value: current value of the range. **/ gdouble gtk_range_get_value (GtkRange *range) { g_return_val_if_fail (GTK_IS_RANGE (range), 0.0); return range->adjustment->value; } static gboolean should_invert (GtkRange *range) { if (range->orientation == GTK_ORIENTATION_HORIZONTAL) return (range->inverted && !range->flippable) || (range->inverted && range->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_LTR) || (!range->inverted && range->flippable && gtk_widget_get_direction (GTK_WIDGET (range)) == GTK_TEXT_DIR_RTL); else return range->inverted; } static void gtk_range_finalize (GObject *object) { GtkRange *range = GTK_RANGE (object); g_free (range->layout); (* G_OBJECT_CLASS (parent_class)->finalize) (object); } static void gtk_range_destroy (GtkObject *object) { GtkRange *range = GTK_RANGE (object); gtk_range_remove_step_timer (range); gtk_range_remove_update_timer (range); if (range->adjustment) { g_signal_handlers_disconnect_by_func (range->adjustment, gtk_range_adjustment_changed, range); g_signal_handlers_disconnect_by_func (range->adjustment, gtk_range_adjustment_value_changed, range); g_object_unref (range->adjustment); range->adjustment = NULL; } (* GTK_OBJECT_CLASS (parent_class)->destroy) (object); } static void gtk_range_size_request (GtkWidget *widget, GtkRequisition *requisition) { GtkRange *range; gint slider_width, stepper_size, trough_border, stepper_spacing; GdkRectangle range_rect; GtkBorder border; range = GTK_RANGE (widget); gtk_range_get_props (range, &slider_width, &stepper_size, &trough_border, &stepper_spacing, NULL, NULL); gtk_range_calc_request (range, slider_width, stepper_size, trough_border, stepper_spacing, &range_rect, &border, NULL, NULL); requisition->width = range_rect.width + border.left + border.right; requisition->height = range_rect.height + border.top + border.bottom; } static void gtk_range_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GtkRange *range; range = GTK_RANGE (widget); widget->allocation = *allocation; range->need_recalc = TRUE; gtk_range_calc_layout (range, range->adjustment->value); if (GTK_WIDGET_REALIZED (range)) gdk_window_move_resize (range->event_window, widget->allocation.x, widget->allocation.y, widget->allocation.width, widget->allocation.height); } static void gtk_range_realize (GtkWidget *widget) { GtkRange *range; GdkWindowAttr attributes; gint attributes_mask; range = GTK_RANGE (widget); gtk_range_calc_layout (range, range->adjustment->value); GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED); widget->window = gtk_widget_get_parent_window (widget); g_object_ref (widget->window); attributes.window_type = GDK_WINDOW_CHILD; attributes.x = widget->allocation.x; attributes.y = widget->allocation.y; attributes.width = widget->allocation.width; attributes.height = widget->allocation.height; attributes.wclass = GDK_INPUT_ONLY; attributes.event_mask = gtk_widget_get_events (widget); attributes.event_mask |= (GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_ENTER_NOTIFY_MASK | GDK_LEAVE_NOTIFY_MASK | GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK); attributes_mask = GDK_WA_X | GDK_WA_Y; range->event_window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask); gdk_window_set_user_data (range->event_window, range); widget->style = gtk_style_attach (widget->style, widget->window); } static void gtk_range_unrealize (GtkWidget *widget) { GtkRange *range = GTK_RANGE (widget); gtk_range_remove_step_timer (range); gtk_range_remove_update_timer (range); gdk_window_set_user_data (range->event_window, NULL); gdk_window_destroy (range->event_window); range->event_window = NULL; if (GTK_WIDGET_CLASS (parent_class)->unrealize) (* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget); } static void gtk_range_map (GtkWidget *widget) { GtkRange *range = GTK_RANGE (widget); gdk_window_show (range->event_window); GTK_WIDGET_CLASS (parent_class)->map (widget); } static void gtk_range_unmap (GtkWidget *widget) { GtkRange *range = GTK_RANGE (widget); gdk_window_hide (range->event_window); GTK_WIDGET_CLASS (parent_class)->unmap (widget); } static void draw_stepper (GtkRange *range, GdkRectangle *rect, GtkArrowType arrow_type, gboolean clicked, gboolean prelighted, GdkRectangle *area) { GtkStateType state_type; GtkShadowType shadow_type; GdkRectangle intersection; GtkWidget *widget = GTK_WIDGET (range); gint arrow_x; gint arrow_y; gint arrow_width; gint arrow_height; /* More to get the right clip region than for efficiency */ if (!gdk_rectangle_intersect (area, rect, &intersection)) return; intersection.x += widget->allocation.x; intersection.y += widget->allocation.y; if (!GTK_WIDGET_IS_SENSITIVE (range)) state_type = GTK_STATE_INSENSITIVE; else if (clicked) state_type = GTK_STATE_ACTIVE; else if (prelighted) state_type = GTK_STATE_PRELIGHT; else state_type = GTK_STATE_NORMAL; if (clicked) shadow_type = GTK_SHADOW_IN; else shadow_type = GTK_SHADOW_OUT; gtk_paint_box (widget->style, widget->window, state_type, shadow_type, &intersection, widget, GTK_RANGE_GET_CLASS (range)->stepper_detail, widget->allocation.x + rect->x, widget->allocation.y + rect->y, rect->width, rect->height); arrow_width = rect->width / 2; arrow_height = rect->height / 2; arrow_x = widget->allocation.x + rect->x + (rect->width - arrow_width) / 2; arrow_y = widget->allocation.y + rect->y + (rect->height - arrow_height) / 2; if (clicked) { gint arrow_displacement_x; gint arrow_displacement_y; gtk_range_get_props (GTK_RANGE (widget), NULL, NULL, NULL, NULL, &arrow_displacement_x, &arrow_displacement_y); arrow_x += arrow_displacement_x; arrow_y += arrow_displacement_y; } gtk_paint_arrow (widget->style, widget->window, state_type, shadow_type, &intersection, widget, GTK_RANGE_GET_CLASS (range)->stepper_detail, arrow_type, TRUE, arrow_x, arrow_y, arrow_width, arrow_height); } static gint gtk_range_expose (GtkWidget *widget, GdkEventExpose *event) { GtkRange *range; gboolean sensitive; GtkStateType state; GdkRectangle expose_area; /* Relative to widget->allocation */ GdkRectangle area; gint focus_line_width = 0; gint focus_padding = 0; range = GTK_RANGE (widget); if (GTK_WIDGET_CAN_FOCUS (range)) { gtk_widget_style_get (GTK_WIDGET (range), "focus-line-width", &focus_line_width, "focus-padding", &focus_padding, NULL); } expose_area = event->area; expose_area.x -= widget->allocation.x; expose_area.y -= widget->allocation.y; gtk_range_calc_layout (range, range->adjustment->value); sensitive = GTK_WIDGET_IS_SENSITIVE (widget); /* Just to be confusing, we draw the trough for the whole * range rectangle, not the trough rectangle (the trough * rectangle is just for hit detection) */ /* The gdk_rectangle_intersect is more to get the right * clip region (limited to range_rect) than for efficiency */ if (gdk_rectangle_intersect (&expose_area, &range->range_rect, &area)) { area.x += widget->allocation.x; area.y += widget->allocation.y; gtk_paint_box (widget->style, widget->window, sensitive ? GTK_STATE_ACTIVE : GTK_STATE_INSENSITIVE, GTK_SHADOW_IN, &area, GTK_WIDGET(range), "trough", widget->allocation.x + range->range_rect.x + focus_line_width + focus_padding, widget->allocation.y + range->range_rect.y + focus_line_width + focus_padding, range->range_rect.width - 2 * (focus_line_width + focus_padding), range->range_rect.height - 2 * (focus_line_width + focus_padding)); if (sensitive && GTK_WIDGET_HAS_FOCUS (range)) gtk_paint_focus (widget->style, widget->window, GTK_WIDGET_STATE (widget), &area, widget, "trough", widget->allocation.x + range->range_rect.x, widget->allocation.y + range->range_rect.y, range->range_rect.width, range->range_rect.height); } if (!sensitive) state = GTK_STATE_INSENSITIVE; else if (range->layout->mouse_location == MOUSE_SLIDER) state = GTK_STATE_PRELIGHT; else state = GTK_STATE_NORMAL; if (gdk_rectangle_intersect (&expose_area, &range->layout->slider, &area)) { area.x += widget->allocation.x; area.y += widget->allocation.y; gtk_paint_slider (widget->style, widget->window, state, GTK_SHADOW_OUT, &area, widget, GTK_RANGE_GET_CLASS (range)->slider_detail, widget->allocation.x + range->layout->slider.x, widget->allocation.y + range->layout->slider.y, range->layout->slider.width, range->layout->slider.height, range->orientation); } if (range->has_stepper_a) draw_stepper (range, &range->layout->stepper_a, range->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT, range->layout->grab_location == MOUSE_STEPPER_A, range->layout->mouse_location == MOUSE_STEPPER_A, &expose_area); if (range->has_stepper_b) draw_stepper (range, &range->layout->stepper_b, range->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT, range->layout->grab_location == MOUSE_STEPPER_B, range->layout->mouse_location == MOUSE_STEPPER_B, &expose_area); if (range->has_stepper_c) draw_stepper (range, &range->layout->stepper_c, range->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_UP : GTK_ARROW_LEFT, range->layout->grab_location == MOUSE_STEPPER_C, range->layout->mouse_location == MOUSE_STEPPER_C, &expose_area); if (range->has_stepper_d) draw_stepper (range, &range->layout->stepper_d, range->orientation == GTK_ORIENTATION_VERTICAL ? GTK_ARROW_DOWN : GTK_ARROW_RIGHT, range->layout->grab_location == MOUSE_STEPPER_D, range->layout->mouse_location == MOUSE_STEPPER_D, &expose_area); return FALSE; } static void range_grab_add (GtkRange *range, MouseLocation location, gint button) { /* we don't actually gtk_grab, since a button is down */ gtk_grab_add (GTK_WIDGET (range)); range->layout->grab_location = location; range->layout->grab_button = button; if (gtk_range_update_mouse_location (range)) gtk_widget_queue_draw (GTK_WIDGET (range)); } static void range_grab_remove (GtkRange *range) { gtk_grab_remove (GTK_WIDGET (range)); range->layout->grab_location = MOUSE_OUTSIDE; range->layout->grab_button = 0; if (gtk_range_update_mouse_location (range)) gtk_widget_queue_draw (GTK_WIDGET (range)); } static GtkScrollType range_get_scroll_for_grab (GtkRange *range) { gboolean invert; invert = should_invert (range); switch (range->layout->grab_location) { /* Backward stepper */ case MOUSE_STEPPER_A: case MOUSE_STEPPER_C: switch (range->layout->grab_button) { case 1: return invert ? GTK_SCROLL_STEP_FORWARD : GTK_SCROLL_STEP_BACKWARD; break; case 2: return invert ? GTK_SCROLL_PAGE_FORWARD : GTK_SCROLL_PAGE_BACKWARD; break; case 3: return invert ? GTK_SCROLL_END : GTK_SCROLL_START; break; } break; /* Forward stepper */ case MOUSE_STEPPER_B: case MOUSE_STEPPER_D: switch (range->layout->grab_button) { case 1: return invert ? GTK_SCROLL_STEP_BACKWARD : GTK_SCROLL_STEP_FORWARD; break; case 2: return invert ? GTK_SCROLL_PAGE_BACKWARD : GTK_SCROLL_PAGE_FORWARD; break; case 3: return invert ? GTK_SCROLL_START : GTK_SCROLL_END; break; } break; /* In the trough */ case MOUSE_TROUGH: { if (range->trough_click_forward) return GTK_SCROLL_PAGE_FORWARD; else return GTK_SCROLL_PAGE_BACKWARD; } break; case MOUSE_OUTSIDE: case MOUSE_SLIDER: case MOUSE_WIDGET: break; } return GTK_SCROLL_NONE; } static gdouble coord_to_value (GtkRange *range, gint coord) { gdouble frac; gdouble value; if (range->orientation == GTK_ORIENTATION_VERTICAL) if (range->layout->trough.height == range->layout->slider.height) frac = 1.0; else frac = ((coord - range->layout->trough.y) / (gdouble) (range->layout->trough.height - range->layout->slider.height)); else if (range->layout->trough.width == range->layout->slider.width) frac = 1.0; else frac = ((coord - range->layout->trough.x) / (gdouble) (range->layout->trough.width - range->layout->slider.width)); if (should_invert (range)) frac = 1.0 - frac; value = range->adjustment->lower + frac * (range->adjustment->upper - range->adjustment->lower - range->adjustment->page_size); return value; } static gint gtk_range_button_press (GtkWidget *widget, GdkEventButton *event) { GtkRange *range = GTK_RANGE (widget); if (!GTK_WIDGET_HAS_FOCUS (widget)) gtk_widget_grab_focus (widget); /* ignore presses when we're already doing something else. */ if (range->layout->grab_location != MOUSE_OUTSIDE) return FALSE; range->layout->mouse_x = event->x; range->layout->mouse_y = event->y; if (gtk_range_update_mouse_location (range)) gtk_widget_queue_draw (widget); if (range->layout->mouse_location == MOUSE_TROUGH && event->button == 1) { /* button 1 steps by page increment, as with button 2 on a stepper */ GtkScrollType scroll; gdouble click_value; click_value = coord_to_value (range, range->orientation == GTK_ORIENTATION_VERTICAL ? event->y : event->x); range->trough_click_forward = click_value > range->adjustment->value; range_grab_add (range, MOUSE_TROUGH, event->button); scroll = range_get_scroll_for_grab (range); gtk_range_add_step_timer (range, scroll); return TRUE; } else if ((range->layout->mouse_location == MOUSE_STEPPER_A || range->layout->mouse_location == MOUSE_STEPPER_B || range->layout->mouse_location == MOUSE_STEPPER_C || range->layout->mouse_location == MOUSE_STEPPER_D) && (event->button == 1 || event->button == 2 || event->button == 3)) { GdkRectangle *stepper_area; GtkScrollType scroll; range_grab_add (range, range->layout->mouse_location, event->button); stepper_area = get_area (range, range->layout->mouse_location); gtk_widget_queue_draw_area (widget, widget->allocation.x + stepper_area->x, widget->allocation.y + stepper_area->y, stepper_area->width, stepper_area->height); scroll = range_get_scroll_for_grab (range); if (scroll != GTK_SCROLL_NONE) gtk_range_add_step_timer (range, scroll); return TRUE; } else if ((range->layout->mouse_location == MOUSE_TROUGH && event->button == 2) || range->layout->mouse_location == MOUSE_SLIDER) { gboolean need_value_update = FALSE; /* Any button can be used to drag the slider, but you can start * dragging the slider with a trough click using button 2; * On button 2 press, we warp the slider to mouse position, * then begin the slider drag. */ if (event->button == 2) { gdouble slider_low_value, slider_high_value, new_value; slider_high_value = coord_to_value (range, range->orientation == GTK_ORIENTATION_VERTICAL ? event->y : event->x); slider_low_value = coord_to_value (range, range->orientation == GTK_ORIENTATION_VERTICAL ? event->y - range->layout->slider.height : event->x - range->layout->slider.width); /* compute new value for warped slider */ new_value = slider_low_value + (slider_high_value - slider_low_value) / 2; /* recalc slider, so we can set slide_initial_slider_position * properly */ range->need_recalc = TRUE; gtk_range_calc_layout (range, new_value); /* defer adjustment updates to update_slider_position() in order * to keep pixel quantisation */ need_value_update = TRUE; } if (range->orientation == GTK_ORIENTATION_VERTICAL) { range->slide_initial_slider_position = range->layout->slider.y; range->slide_initial_coordinate = event->y; } else { range->slide_initial_slider_position = range->layout->slider.x; range->slide_initial_coordinate = event->x; } if (need_value_update) update_slider_position (range, event->x, event->y); range_grab_add (range, MOUSE_SLIDER, event->button); return TRUE; } return FALSE; } /* 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) { gint delta; gint c; gdouble new_value; gboolean handled; if (range->orientation == GTK_ORIENTATION_VERTICAL) delta = mouse_y - range->slide_initial_coordinate; else delta = mouse_x - range->slide_initial_coordinate; c = range->slide_initial_slider_position + delta; new_value = coord_to_value (range, c); g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, new_value, &handled); } static void stop_scrolling (GtkRange *range) { range_grab_remove (range); gtk_range_remove_step_timer (range); /* Flush any pending discontinuous/delayed updates */ gtk_range_update_value (range); /* Just be lazy about this, if we scrolled it will all redraw anyway, * so no point optimizing the button deactivate case */ gtk_widget_queue_draw (GTK_WIDGET (range)); } static gint gtk_range_button_release (GtkWidget *widget, GdkEventButton *event) { GtkRange *range = GTK_RANGE (widget); if (event->window == range->event_window) { range->layout->mouse_x = event->x; range->layout->mouse_y = event->y; } else { gdk_window_get_pointer (range->event_window, &range->layout->mouse_x, &range->layout->mouse_y, NULL); } if (range->layout->grab_button == event->button) { if (range->layout->grab_location == MOUSE_SLIDER) update_slider_position (range, range->layout->mouse_x, range->layout->mouse_y); stop_scrolling (range); return TRUE; } return FALSE; } /** * _gtk_range_get_wheel_delta: * @range: a #GtkRange * @direction: A #GdkScrollDirection * * Returns a good step value for the mouse wheel. * * Return value: A good step value for the mouse wheel. * * Since: 2.4 **/ gdouble _gtk_range_get_wheel_delta (GtkRange *range, GdkScrollDirection direction) { GtkAdjustment *adj = range->adjustment; gdouble delta; if (GTK_IS_SCROLLBAR (range)) delta = pow (adj->page_size, 2.0 / 3.0); else delta = adj->step_increment * 2; if (direction == GDK_SCROLL_UP || direction == GDK_SCROLL_LEFT) delta = - delta; if (range->inverted) delta = - delta; return delta; } static gint gtk_range_scroll_event (GtkWidget *widget, GdkEventScroll *event) { GtkRange *range = GTK_RANGE (widget); if (GTK_WIDGET_REALIZED (range)) { GtkAdjustment *adj = GTK_RANGE (range)->adjustment; gdouble delta; gboolean handled; delta = _gtk_range_get_wheel_delta (range, event->direction); g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_JUMP, adj->value + delta, &handled); /* Policy DELAYED makes sense with scroll events, * but DISCONTINUOUS doesn't, so we update immediately * for DISCONTINUOUS */ if (range->update_policy == GTK_UPDATE_DISCONTINUOUS) gtk_range_update_value (range); } return TRUE; } static gint gtk_range_motion_notify (GtkWidget *widget, GdkEventMotion *event) { GtkRange *range; gint x, y; range = GTK_RANGE (widget); gdk_window_get_pointer (range->event_window, &x, &y, NULL); range->layout->mouse_x = x; range->layout->mouse_y = y; if (gtk_range_update_mouse_location (range)) gtk_widget_queue_draw (widget); if (range->layout->grab_location == MOUSE_SLIDER) update_slider_position (range, x, y); /* We handled the event if the mouse was in the range_rect */ return range->layout->mouse_location != MOUSE_OUTSIDE; } static gint gtk_range_enter_notify (GtkWidget *widget, GdkEventCrossing *event) { GtkRange *range = GTK_RANGE (widget); range->layout->mouse_x = event->x; range->layout->mouse_y = event->y; if (gtk_range_update_mouse_location (range)) gtk_widget_queue_draw (widget); return TRUE; } static gint gtk_range_leave_notify (GtkWidget *widget, GdkEventCrossing *event) { GtkRange *range = GTK_RANGE (widget); range->layout->mouse_x = -1; range->layout->mouse_y = -1; if (gtk_range_update_mouse_location (range)) gtk_widget_queue_draw (widget); return TRUE; } static void gtk_range_grab_notify (GtkWidget *widget, gboolean was_grabbed) { if (!was_grabbed) stop_scrolling (GTK_RANGE (widget)); } static void gtk_range_state_changed (GtkWidget *widget, GtkStateType previous_state) { if (!GTK_WIDGET_IS_SENSITIVE (widget)) stop_scrolling (GTK_RANGE (widget)); } static void gtk_range_adjustment_changed (GtkAdjustment *adjustment, gpointer data) { GtkRange *range = GTK_RANGE (data); range->need_recalc = TRUE; gtk_widget_queue_draw (GTK_WIDGET (range)); /* Note that we don't round off to range->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); range->need_recalc = TRUE; gtk_widget_queue_draw (GTK_WIDGET (range)); /* This is so we don't lag the widget being scrolled. */ if (GTK_WIDGET_REALIZED (range)) gdk_window_process_updates (GTK_WIDGET (range)->window, FALSE); /* Note that we don't round off to range->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); } static void gtk_range_style_set (GtkWidget *widget, GtkStyle *previous_style) { GtkRange *range = GTK_RANGE (widget); range->need_recalc = TRUE; (* GTK_WIDGET_CLASS (parent_class)->style_set) (widget, previous_style); } static void step_back (GtkRange *range) { gdouble newval; gboolean handled; newval = range->adjustment->value - range->adjustment->step_increment; g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_STEP_BACKWARD, newval, &handled); } static void step_forward (GtkRange *range) { gdouble newval; gboolean handled; newval = range->adjustment->value + range->adjustment->step_increment; g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_STEP_FORWARD, newval, &handled); } static void page_back (GtkRange *range) { gdouble newval; gboolean handled; newval = range->adjustment->value - range->adjustment->page_increment; g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_PAGE_BACKWARD, newval, &handled); } static void page_forward (GtkRange *range) { gdouble newval; gboolean handled; newval = range->adjustment->value + range->adjustment->page_increment; g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_PAGE_FORWARD, newval, &handled); } static void scroll_begin (GtkRange *range) { gboolean handled; g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_START, range->adjustment->lower, &handled); } static void scroll_end (GtkRange *range) { gdouble newval; gboolean handled; newval = range->adjustment->upper - range->adjustment->page_size; g_signal_emit (range, signals[CHANGE_VALUE], 0, GTK_SCROLL_END, newval, &handled); } static void gtk_range_scroll (GtkRange *range, GtkScrollType scroll) { switch (scroll) { case GTK_SCROLL_STEP_LEFT: if (should_invert (range)) step_forward (range); else step_back (range); break; case GTK_SCROLL_STEP_UP: if (should_invert (range)) step_forward (range); else step_back (range); break; case GTK_SCROLL_STEP_RIGHT: if (should_invert (range)) step_back (range); else step_forward (range); break; case GTK_SCROLL_STEP_DOWN: if (should_invert (range)) 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 (range)) page_forward (range); else page_back (range); break; case GTK_SCROLL_PAGE_UP: if (should_invert (range)) page_forward (range); else page_back (range); break; case GTK_SCROLL_PAGE_RIGHT: if (should_invert (range)) page_back (range); else page_forward (range); break; case GTK_SCROLL_PAGE_DOWN: if (should_invert (range)) 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: break; } } static void gtk_range_move_slider (GtkRange *range, GtkScrollType scroll) { gtk_range_scroll (range, scroll); /* Policy DELAYED makes sense with key events, * but DISCONTINUOUS doesn't, so we update immediately * for DISCONTINUOUS */ if (range->update_policy == GTK_UPDATE_DISCONTINUOUS) gtk_range_update_value (range); } static void gtk_range_get_props (GtkRange *range, gint *slider_width, gint *stepper_size, gint *trough_border, gint *stepper_spacing, gint *arrow_displacement_x, gint *arrow_displacement_y) { GtkWidget *widget = GTK_WIDGET (range); gint tmp_slider_width, tmp_stepper_size, tmp_trough_border, tmp_stepper_spacing; gint tmp_arrow_displacement_x, tmp_arrow_displacement_y; gtk_widget_style_get (widget, "slider_width", &tmp_slider_width, "trough_border", &tmp_trough_border, "stepper_size", &tmp_stepper_size, "stepper_spacing", &tmp_stepper_spacing, "arrow_displacement_x", &tmp_arrow_displacement_x, "arrow_displacement_y", &tmp_arrow_displacement_y, NULL); if (GTK_WIDGET_CAN_FOCUS (range)) { gint focus_line_width; gint focus_padding; gtk_widget_style_get (GTK_WIDGET (range), "focus-line-width", &focus_line_width, "focus-padding", &focus_padding, NULL); tmp_trough_border += focus_line_width + focus_padding; } if (slider_width) *slider_width = tmp_slider_width; if (trough_border) *trough_border = tmp_trough_border; if (stepper_size) *stepper_size = tmp_stepper_size; if (stepper_spacing) *stepper_spacing = tmp_stepper_spacing; if (arrow_displacement_x) *arrow_displacement_x = tmp_arrow_displacement_x; if (arrow_displacement_y) *arrow_displacement_y = tmp_arrow_displacement_y; } #define POINT_IN_RECT(xcoord, ycoord, rect) \ ((xcoord) >= (rect).x && \ (xcoord) < ((rect).x + (rect).width) && \ (ycoord) >= (rect).y && \ (ycoord) < ((rect).y + (rect).height)) /* Update mouse location, return TRUE if it changes */ static gboolean gtk_range_update_mouse_location (GtkRange *range) { gint x, y; MouseLocation old; GtkWidget *widget; widget = GTK_WIDGET (range); old = range->layout->mouse_location; x = range->layout->mouse_x; y = range->layout->mouse_y; if (range->layout->grab_location != MOUSE_OUTSIDE) range->layout->mouse_location = range->layout->grab_location; else if (POINT_IN_RECT (x, y, range->layout->stepper_a)) range->layout->mouse_location = MOUSE_STEPPER_A; else if (POINT_IN_RECT (x, y, range->layout->stepper_b)) range->layout->mouse_location = MOUSE_STEPPER_B; else if (POINT_IN_RECT (x, y, range->layout->stepper_c)) range->layout->mouse_location = MOUSE_STEPPER_C; else if (POINT_IN_RECT (x, y, range->layout->stepper_d)) range->layout->mouse_location = MOUSE_STEPPER_D; else if (POINT_IN_RECT (x, y, range->layout->slider)) range->layout->mouse_location = MOUSE_SLIDER; else if (POINT_IN_RECT (x, y, range->layout->trough)) range->layout->mouse_location = MOUSE_TROUGH; else if (POINT_IN_RECT (x, y, widget->allocation)) range->layout->mouse_location = MOUSE_WIDGET; else range->layout->mouse_location = MOUSE_OUTSIDE; return old != range->layout->mouse_location; } /* Clamp rect, border inside widget->allocation, such that we prefer * to take space from border not rect in all directions, and prefer to * give space to border over rect in one direction. */ static void clamp_dimensions (GtkWidget *widget, GdkRectangle *rect, GtkBorder *border, gboolean border_expands_horizontally) { gint extra, shortage; g_return_if_fail (rect->x == 0); g_return_if_fail (rect->y == 0); g_return_if_fail (rect->width >= 0); g_return_if_fail (rect->height >= 0); /* Width */ extra = widget->allocation.width - border->left - border->right - rect->width; if (extra > 0) { if (border_expands_horizontally) { border->left += extra / 2; border->right += extra / 2 + extra % 2; } else { rect->width += extra; } } /* See if we can fit rect, if not kill the border */ shortage = rect->width - widget->allocation.width; if (shortage > 0) { rect->width = widget->allocation.width; /* lose the border */ border->left = 0; border->right = 0; } else { /* See if we can fit rect with borders */ shortage = rect->width + border->left + border->right - widget->allocation.width; if (shortage > 0) { /* Shrink borders */ border->left -= shortage / 2; border->right -= shortage / 2 + shortage % 2; } } /* Height */ extra = widget->allocation.height - border->top - border->bottom - rect->height; if (extra > 0) { if (border_expands_horizontally) { /* don't expand border vertically */ rect->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 = rect->height - widget->allocation.height; if (shortage > 0) { rect->height = widget->allocation.height; /* lose the border */ border->top = 0; border->bottom = 0; } else { /* See if we can fit rect with borders */ shortage = rect->height + border->top + border->bottom - widget->allocation.height; if (shortage > 0) { /* Shrink borders */ border->top -= shortage / 2; border->bottom -= shortage / 2 + shortage % 2; } } } static void gtk_range_calc_request (GtkRange *range, gint slider_width, gint stepper_size, gint trough_border, gint stepper_spacing, GdkRectangle *range_rect, GtkBorder *border, gint *n_steppers_p, gint *slider_length_p) { gint slider_length; gint n_steppers; border->left = 0; border->right = 0; border->top = 0; border->bottom = 0; if (GTK_RANGE_GET_CLASS (range)->get_range_border) (* GTK_RANGE_GET_CLASS (range)->get_range_border) (range, border); n_steppers = 0; if (range->has_stepper_a) n_steppers += 1; if (range->has_stepper_b) n_steppers += 1; if (range->has_stepper_c) n_steppers += 1; if (range->has_stepper_d) n_steppers += 1; slider_length = range->min_slider_size; range_rect->x = 0; range_rect->y = 0; /* We never expand to fill available space in the small dimension * (i.e. vertical scrollbars are always a fixed width) */ if (range->orientation == GTK_ORIENTATION_VERTICAL) { range_rect->width = trough_border * 2 + slider_width; range_rect->height = stepper_size * n_steppers + stepper_spacing * 2 + trough_border * 2 + slider_length; } else { range_rect->width = stepper_size * n_steppers + stepper_spacing * 2 + trough_border * 2 + slider_length; range_rect->height = trough_border * 2 + slider_width; } if (n_steppers_p) *n_steppers_p = n_steppers; if (slider_length_p) *slider_length_p = slider_length; } static void gtk_range_calc_layout (GtkRange *range, gdouble adjustment_value) { gint slider_width, stepper_size, trough_border, stepper_spacing; gint slider_length; GtkBorder border; gint n_steppers; GdkRectangle range_rect; GtkRangeLayout *layout; GtkWidget *widget; if (!range->need_recalc) return; /* If we have a too-small allocation, we prefer the steppers over * the trough/slider, probably the steppers are a more useful * feature in small spaces. * * Also, we prefer to draw the range itself rather than the border * areas if there's a conflict, since the borders will be decoration * not controls. Though this depends on subclasses cooperating by * not drawing on range->range_rect. */ widget = GTK_WIDGET (range); layout = range->layout; gtk_range_get_props (range, &slider_width, &stepper_size, &trough_border, &stepper_spacing, NULL, NULL); gtk_range_calc_request (range, slider_width, stepper_size, trough_border, stepper_spacing, &range_rect, &border, &n_steppers, &slider_length); /* We never expand to fill available space in the small dimension * (i.e. vertical scrollbars are always a fixed width) */ if (range->orientation == GTK_ORIENTATION_VERTICAL) { clamp_dimensions (widget, &range_rect, &border, TRUE); } else { clamp_dimensions (widget, &range_rect, &border, FALSE); } range_rect.x = border.left; range_rect.y = border.top; range->range_rect = range_rect; if (range->orientation == GTK_ORIENTATION_VERTICAL) { gint stepper_width, stepper_height; /* Steppers are the width of the range, and stepper_size in * height, or if we don't have enough height, divided equally * among available space. */ stepper_width = range_rect.width - trough_border * 2; if (stepper_width < 1) stepper_width = range_rect.width; /* screw the trough border */ if (n_steppers == 0) stepper_height = 0; /* avoid divide by n_steppers */ else stepper_height = MIN (stepper_size, (range_rect.height / n_steppers)); /* Stepper A */ layout->stepper_a.x = range_rect.x + trough_border; layout->stepper_a.y = range_rect.y + trough_border; if (range->has_stepper_a) { layout->stepper_a.width = stepper_width; layout->stepper_a.height = stepper_height; } else { layout->stepper_a.width = 0; layout->stepper_a.height = 0; } /* Stepper B */ layout->stepper_b.x = layout->stepper_a.x; layout->stepper_b.y = layout->stepper_a.y + layout->stepper_a.height; if (range->has_stepper_b) { layout->stepper_b.width = stepper_width; layout->stepper_b.height = stepper_height; } else { layout->stepper_b.width = 0; layout->stepper_b.height = 0; } /* Stepper D */ if (range->has_stepper_d) { layout->stepper_d.width = stepper_width; layout->stepper_d.height = stepper_height; } else { layout->stepper_d.width = 0; layout->stepper_d.height = 0; } layout->stepper_d.x = layout->stepper_a.x; layout->stepper_d.y = range_rect.y + range_rect.height - layout->stepper_d.height - trough_border; /* Stepper C */ if (range->has_stepper_c) { layout->stepper_c.width = stepper_width; layout->stepper_c.height = stepper_height; } else { layout->stepper_c.width = 0; layout->stepper_c.height = 0; } layout->stepper_c.x = layout->stepper_a.x; layout->stepper_c.y = layout->stepper_d.y - layout->stepper_c.height; /* Now the trough is the remaining space between steppers B and C, * if any */ layout->trough.x = range_rect.x; layout->trough.y = layout->stepper_b.y + layout->stepper_b.height; layout->trough.width = range_rect.width; layout->trough.height = layout->stepper_c.y - (layout->stepper_b.y + layout->stepper_b.height); /* Slider fits into the trough, with stepper_spacing on either side, * and the size/position based on the adjustment or fixed, depending. */ layout->slider.x = layout->trough.x + trough_border; layout->slider.width = layout->trough.width - trough_border * 2; /* Compute slider position/length */ { gint y, bottom, top, height; top = layout->trough.y + stepper_spacing; bottom = layout->trough.y + layout->trough.height - stepper_spacing; /* slider height is the fraction (page_size / * total_adjustment_range) times the trough height in pixels */ if (range->adjustment->upper - range->adjustment->lower != 0) height = ((bottom - top) * (range->adjustment->page_size / (range->adjustment->upper - range->adjustment->lower))); else height = range->min_slider_size; if (height < range->min_slider_size || range->slider_size_fixed) height = range->min_slider_size; height = MIN (height, (layout->trough.height - stepper_spacing * 2)); y = top; if (range->adjustment->upper - range->adjustment->lower - range->adjustment->page_size != 0) y += (bottom - top - height) * ((adjustment_value - range->adjustment->lower) / (range->adjustment->upper - range->adjustment->lower - range->adjustment->page_size)); y = CLAMP (y, top, bottom); if (should_invert (range)) y = bottom - (y - top + height); layout->slider.y = y; layout->slider.height = height; /* These are publically exported */ range->slider_start = layout->slider.y; range->slider_end = layout->slider.y + layout->slider.height; } } else { gint stepper_width, stepper_height; /* Steppers are the height of the range, and stepper_size in * width, or if we don't have enough width, divided equally * among available space. */ stepper_height = range_rect.height - trough_border * 2; if (stepper_height < 1) stepper_height = range_rect.height; /* screw the trough border */ if (n_steppers == 0) stepper_width = 0; /* avoid divide by n_steppers */ else stepper_width = MIN (stepper_size, (range_rect.width / n_steppers)); /* Stepper A */ layout->stepper_a.x = range_rect.x + trough_border; layout->stepper_a.y = range_rect.y + trough_border; if (range->has_stepper_a) { layout->stepper_a.width = stepper_width; layout->stepper_a.height = stepper_height; } else { layout->stepper_a.width = 0; layout->stepper_a.height = 0; } /* Stepper B */ layout->stepper_b.x = layout->stepper_a.x + layout->stepper_a.width; layout->stepper_b.y = layout->stepper_a.y; if (range->has_stepper_b) { layout->stepper_b.width = stepper_width; layout->stepper_b.height = stepper_height; } else { layout->stepper_b.width = 0; layout->stepper_b.height = 0; } /* Stepper D */ if (range->has_stepper_d) { layout->stepper_d.width = stepper_width; layout->stepper_d.height = stepper_height; } else { layout->stepper_d.width = 0; layout->stepper_d.height = 0; } layout->stepper_d.x = range_rect.x + range_rect.width - layout->stepper_d.width - trough_border; layout->stepper_d.y = layout->stepper_a.y; /* Stepper C */ if (range->has_stepper_c) { layout->stepper_c.width = stepper_width; layout->stepper_c.height = stepper_height; } else { layout->stepper_c.width = 0; layout->stepper_c.height = 0; } layout->stepper_c.x = layout->stepper_d.x - layout->stepper_c.width; layout->stepper_c.y = layout->stepper_a.y; /* Now the trough is the remaining space between steppers B and C, * if any */ layout->trough.x = layout->stepper_b.x + layout->stepper_b.width; layout->trough.y = range_rect.y; layout->trough.width = layout->stepper_c.x - (layout->stepper_b.x + layout->stepper_b.width); layout->trough.height = range_rect.height; /* Slider fits into the trough, with stepper_spacing on either side, * and the size/position based on the adjustment or fixed, depending. */ layout->slider.y = layout->trough.y + trough_border; layout->slider.height = layout->trough.height - trough_border * 2; /* Compute slider position/length */ { gint x, left, right, width; left = layout->trough.x + stepper_spacing; right = layout->trough.x + layout->trough.width - stepper_spacing; /* slider width is the fraction (page_size / * total_adjustment_range) times the trough width in pixels */ if (range->adjustment->upper - range->adjustment->lower != 0) width = ((right - left) * (range->adjustment->page_size / (range->adjustment->upper - range->adjustment->lower))); else width = range->min_slider_size; if (width < range->min_slider_size || range->slider_size_fixed) width = range->min_slider_size; width = MIN (width, (layout->trough.width - stepper_spacing * 2)); x = left; if (range->adjustment->upper - range->adjustment->lower - range->adjustment->page_size != 0) x += (right - left - width) * ((adjustment_value - range->adjustment->lower) / (range->adjustment->upper - range->adjustment->lower - range->adjustment->page_size)); x = CLAMP (x, left, right); if (should_invert (range)) x = right - (x - left + width); layout->slider.x = x; layout->slider.width = width; /* These are publically exported */ range->slider_start = layout->slider.x; range->slider_end = layout->slider.x + layout->slider.width; } } gtk_range_update_mouse_location (range); } static GdkRectangle* get_area (GtkRange *range, MouseLocation location) { switch (location) { case MOUSE_STEPPER_A: return &range->layout->stepper_a; case MOUSE_STEPPER_B: return &range->layout->stepper_b; case MOUSE_STEPPER_C: return &range->layout->stepper_c; case MOUSE_STEPPER_D: return &range->layout->stepper_d; case MOUSE_TROUGH: return &range->layout->trough; case MOUSE_SLIDER: return &range->layout->slider; case MOUSE_WIDGET: case MOUSE_OUTSIDE: break; } g_warning (G_STRLOC": bug"); return NULL; } static gboolean gtk_range_real_change_value (GtkRange *range, GtkScrollType scroll, gdouble value) { /* potentially adjust the bounds _before we clamp */ g_signal_emit (range, signals[ADJUST_BOUNDS], 0, value); value = CLAMP (value, range->adjustment->lower, (range->adjustment->upper - range->adjustment->page_size)); if (range->round_digits >= 0) { glong power; gint i; i = range->round_digits; power = 1; while (i--) power *= 10; value = floor ((value * power) + 0.5) / power; } if (range->adjustment->value != value) { range->need_recalc = TRUE; gtk_widget_queue_draw (GTK_WIDGET (range)); switch (range->update_policy) { case GTK_UPDATE_CONTINUOUS: gtk_adjustment_set_value (range->adjustment, value); break; /* Delayed means we update after a period of inactivity */ case GTK_UPDATE_DELAYED: gtk_range_reset_update_timer (range); /* FALL THRU */ /* Discontinuous means we update on button release */ case GTK_UPDATE_DISCONTINUOUS: /* don't emit value_changed signal */ range->adjustment->value = value; range->update_pending = TRUE; break; } } return FALSE; } static void gtk_range_update_value (GtkRange *range) { gtk_range_remove_update_timer (range); if (range->update_pending) { gtk_adjustment_value_changed (range->adjustment); range->update_pending = FALSE; } } struct _GtkRangeStepTimer { guint timeout_id; GtkScrollType step; }; static gboolean second_timeout (gpointer data) { GtkRange *range; GDK_THREADS_ENTER (); range = GTK_RANGE (data); gtk_range_scroll (range, range->timer->step); GDK_THREADS_LEAVE (); return TRUE; } static gboolean initial_timeout (gpointer data) { GtkRange *range; GDK_THREADS_ENTER (); range = GTK_RANGE (data); range->timer->timeout_id = g_timeout_add (SCROLL_LATER_DELAY, second_timeout, range); GDK_THREADS_LEAVE (); /* remove self */ return FALSE; } static void gtk_range_add_step_timer (GtkRange *range, GtkScrollType step) { g_return_if_fail (range->timer == NULL); g_return_if_fail (step != GTK_SCROLL_NONE); range->timer = g_new (GtkRangeStepTimer, 1); range->timer->timeout_id = g_timeout_add (SCROLL_INITIAL_DELAY, initial_timeout, range); range->timer->step = step; gtk_range_scroll (range, range->timer->step); } static void gtk_range_remove_step_timer (GtkRange *range) { if (range->timer) { if (range->timer->timeout_id != 0) g_source_remove (range->timer->timeout_id); g_free (range->timer); range->timer = NULL; } } static gboolean update_timeout (gpointer data) { GtkRange *range; GDK_THREADS_ENTER (); range = GTK_RANGE (data); gtk_range_update_value (range); range->update_timeout_id = 0; GDK_THREADS_LEAVE (); /* self-remove */ return FALSE; } static void gtk_range_reset_update_timer (GtkRange *range) { gtk_range_remove_update_timer (range); range->update_timeout_id = g_timeout_add (UPDATE_DELAY, update_timeout, range); } static void gtk_range_remove_update_timer (GtkRange *range) { if (range->update_timeout_id != 0) { g_source_remove (range->update_timeout_id); range->update_timeout_id = 0; } }