/* GTK - The GIMP Toolkit * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald * * 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 1997-2000. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ /** * SECTION:gtkbbox * @Short_description: Base class for GtkHButtonBox and GtkVButtonBox * @Title: GtkButtonBox * @See_also: #GtkVButtonBox, #GtkHButtonBox * * The primary purpose of this class is to keep track of the various properties * of #GtkHButtonBox and #GtkVButtonBox widgets. * * gtk_button_box_get_child_size() retrieves the minimum width and height * for widgets in a given button box. * * The internal padding of buttons can be retrieved and changed per button box * using gtk_button_box_get_child_ipadding() and * gtk_button_box_set_child_ipadding() respectively. * * gtk_button_box_get_spacing() and gtk_button_box_set_spacing() retrieve and * change default number of pixels between buttons, respectively. * * gtk_button_box_get_layout() and gtk_button_box_set_layout() retrieve and * alter the method used to spread the buttons in a button box across the * container, respectively. * * The main purpose of GtkButtonBox is to make sure the children have all the * same size. Therefore it ignores the homogeneous property which it inherited * from GtkBox, and always behaves as if homogeneous was %TRUE. */ #include "config.h" #include "gtkbbox.h" #include "gtkhbbox.h" #include "gtkvbbox.h" #include "gtkorientable.h" #include "gtkprivate.h" #include "gtkintl.h" #include "gtkalias.h" enum { PROP_0, PROP_LAYOUT_STYLE }; enum { CHILD_PROP_0, CHILD_PROP_SECONDARY }; static void gtk_button_box_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_button_box_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gtk_button_box_size_request (GtkWidget *widget, GtkRequisition *requisition); static void gtk_button_box_size_allocate (GtkWidget *widget, GtkAllocation *allocation); static void gtk_button_box_set_child_property (GtkContainer *container, GtkWidget *child, guint property_id, const GValue *value, GParamSpec *pspec); static void gtk_button_box_get_child_property (GtkContainer *container, GtkWidget *child, guint property_id, GValue *value, GParamSpec *pspec); #define DEFAULT_CHILD_MIN_WIDTH 85 #define DEFAULT_CHILD_MIN_HEIGHT 27 #define DEFAULT_CHILD_IPAD_X 4 #define DEFAULT_CHILD_IPAD_Y 0 G_DEFINE_ABSTRACT_TYPE (GtkButtonBox, gtk_button_box, GTK_TYPE_BOX) static void gtk_button_box_class_init (GtkButtonBoxClass *class) { GtkWidgetClass *widget_class; GObjectClass *gobject_class; GtkContainerClass *container_class; gobject_class = G_OBJECT_CLASS (class); widget_class = (GtkWidgetClass*) class; container_class = (GtkContainerClass*) class; gobject_class->set_property = gtk_button_box_set_property; gobject_class->get_property = gtk_button_box_get_property; widget_class->size_request = gtk_button_box_size_request; widget_class->size_allocate = gtk_button_box_size_allocate; container_class->set_child_property = gtk_button_box_set_child_property; container_class->get_child_property = gtk_button_box_get_child_property; /* FIXME we need to override the "spacing" property on GtkBox once * libgobject allows that. */ gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("child-min-width", P_("Minimum child width"), P_("Minimum width of buttons inside the box"), 0, G_MAXINT, DEFAULT_CHILD_MIN_WIDTH, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("child-min-height", P_("Minimum child height"), P_("Minimum height of buttons inside the box"), 0, G_MAXINT, DEFAULT_CHILD_MIN_HEIGHT, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("child-internal-pad-x", P_("Child internal width padding"), P_("Amount to increase child's size on either side"), 0, G_MAXINT, DEFAULT_CHILD_IPAD_X, GTK_PARAM_READABLE)); gtk_widget_class_install_style_property (widget_class, g_param_spec_int ("child-internal-pad-y", P_("Child internal height padding"), P_("Amount to increase child's size on the top and bottom"), 0, G_MAXINT, DEFAULT_CHILD_IPAD_Y, GTK_PARAM_READABLE)); g_object_class_install_property (gobject_class, PROP_LAYOUT_STYLE, g_param_spec_enum ("layout-style", P_("Layout style"), P_("How to layout the buttons in the box. Possible values are default, spread, edge, start and end"), GTK_TYPE_BUTTON_BOX_STYLE, GTK_BUTTONBOX_DEFAULT_STYLE, GTK_PARAM_READWRITE)); gtk_container_class_install_child_property (container_class, CHILD_PROP_SECONDARY, g_param_spec_boolean ("secondary", P_("Secondary"), P_("If TRUE, the child appears in a secondary group of children, suitable for, e.g., help buttons"), FALSE, GTK_PARAM_READWRITE)); } static void gtk_button_box_init (GtkButtonBox *button_box) { GTK_BOX (button_box)->spacing = 0; button_box->child_min_width = GTK_BUTTONBOX_DEFAULT; button_box->child_min_height = GTK_BUTTONBOX_DEFAULT; button_box->child_ipad_x = GTK_BUTTONBOX_DEFAULT; button_box->child_ipad_y = GTK_BUTTONBOX_DEFAULT; button_box->layout_style = GTK_BUTTONBOX_DEFAULT_STYLE; } static void gtk_button_box_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { switch (prop_id) { case PROP_LAYOUT_STYLE: gtk_button_box_set_layout (GTK_BUTTON_BOX (object), g_value_get_enum (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_button_box_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { switch (prop_id) { case PROP_LAYOUT_STYLE: g_value_set_enum (value, GTK_BUTTON_BOX (object)->layout_style); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_button_box_set_child_property (GtkContainer *container, GtkWidget *child, guint property_id, const GValue *value, GParamSpec *pspec) { switch (property_id) { case CHILD_PROP_SECONDARY: gtk_button_box_set_child_secondary (GTK_BUTTON_BOX (container), child, g_value_get_boolean (value)); break; default: GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec); break; } } static void gtk_button_box_get_child_property (GtkContainer *container, GtkWidget *child, guint property_id, GValue *value, GParamSpec *pspec) { switch (property_id) { case CHILD_PROP_SECONDARY: g_value_set_boolean (value, gtk_button_box_get_child_secondary (GTK_BUTTON_BOX (container), child)); break; default: GTK_CONTAINER_WARN_INVALID_CHILD_PROPERTY_ID (container, property_id, pspec); break; } } /** * gtk_button_box_set_layout: * @widget: a #GtkButtonBox * @layout_style: the new layout style * * Changes the way buttons are arranged in their container. */ void gtk_button_box_set_layout (GtkButtonBox *widget, GtkButtonBoxStyle layout_style) { g_return_if_fail (GTK_IS_BUTTON_BOX (widget)); g_return_if_fail (layout_style >= GTK_BUTTONBOX_DEFAULT_STYLE && layout_style <= GTK_BUTTONBOX_CENTER); if (widget->layout_style != layout_style) { widget->layout_style = layout_style; g_object_notify (G_OBJECT (widget), "layout-style"); gtk_widget_queue_resize (GTK_WIDGET (widget)); } } /** * gtk_button_box_get_layout: * @widget: a #GtkButtonBox * * Retrieves the method being used to arrange the buttons in a button box. * * Returns: the method used to layout buttons in @widget. */ GtkButtonBoxStyle gtk_button_box_get_layout (GtkButtonBox *widget) { g_return_val_if_fail (GTK_IS_BUTTON_BOX (widget), GTK_BUTTONBOX_SPREAD); return widget->layout_style; } /** * gtk_button_box_get_child_secondary: * @widget: a #GtkButtonBox * @child: a child of @widget * * Returns whether @child should appear in a secondary group of children. * * Return value: whether @child should appear in a secondary group of children. * * Since: 2.4 **/ gboolean gtk_button_box_get_child_secondary (GtkButtonBox *widget, GtkWidget *child) { GList *list; GtkBoxChild *child_info; g_return_val_if_fail (GTK_IS_BUTTON_BOX (widget), FALSE); g_return_val_if_fail (GTK_IS_WIDGET (child), FALSE); child_info = NULL; list = GTK_BOX (widget)->children; while (list) { child_info = list->data; if (child_info->widget == child) break; list = list->next; } g_return_val_if_fail (list != NULL, FALSE); return child_info->is_secondary; } /** * gtk_button_box_set_child_secondary * @widget: a #GtkButtonBox * @child: a child of @widget * @is_secondary: if %TRUE, the @child appears in a secondary group of the * button box. * * Sets whether @child should appear in a secondary group of children. * A typical use of a secondary child is the help button in a dialog. * * This group appears after the other children if the style * is %GTK_BUTTONBOX_START, %GTK_BUTTONBOX_SPREAD or * %GTK_BUTTONBOX_EDGE, and before the other children if the style * is %GTK_BUTTONBOX_END. For horizontal button boxes, the definition * of before/after depends on direction of the widget (see * gtk_widget_set_direction()). If the style is %GTK_BUTTONBOX_START * or %GTK_BUTTONBOX_END, then the secondary children are aligned at * the other end of the button box from the main children. For the * other styles, they appear immediately next to the main children. **/ void gtk_button_box_set_child_secondary (GtkButtonBox *widget, GtkWidget *child, gboolean is_secondary) { GList *list; g_return_if_fail (GTK_IS_BUTTON_BOX (widget)); g_return_if_fail (GTK_IS_WIDGET (child)); g_return_if_fail (child->parent == GTK_WIDGET (widget)); list = GTK_BOX (widget)->children; while (list) { GtkBoxChild *child_info = list->data; if (child_info->widget == child) { child_info->is_secondary = is_secondary; break; } list = list->next; } gtk_widget_child_notify (child, "secondary"); if (gtk_widget_get_visible (GTK_WIDGET (widget)) && gtk_widget_get_visible (child)) gtk_widget_queue_resize (child); } /* Ask children how much space they require and round up to match minimum size and internal padding. Returns the size each single child should have. */ void _gtk_button_box_child_requisition (GtkWidget *widget, int *nvis_children, int *nvis_secondaries, int *width, int *height) { GtkButtonBox *bbox; GtkBoxChild *child; GList *children; gint nchildren; gint nsecondaries; gint needed_width; gint needed_height; GtkRequisition child_requisition; gint ipad_w; gint ipad_h; gint width_default; gint height_default; gint ipad_x_default; gint ipad_y_default; gint child_min_width; gint child_min_height; gint ipad_x; gint ipad_y; g_return_if_fail (GTK_IS_BUTTON_BOX (widget)); bbox = GTK_BUTTON_BOX (widget); gtk_widget_style_get (widget, "child-min-width", &width_default, "child-min-height", &height_default, "child-internal-pad-x", &ipad_x_default, "child-internal-pad-y", &ipad_y_default, NULL); child_min_width = bbox->child_min_width != GTK_BUTTONBOX_DEFAULT ? bbox->child_min_width : width_default; child_min_height = bbox->child_min_height !=GTK_BUTTONBOX_DEFAULT ? bbox->child_min_height : height_default; ipad_x = bbox->child_ipad_x != GTK_BUTTONBOX_DEFAULT ? bbox->child_ipad_x : ipad_x_default; ipad_y = bbox->child_ipad_y != GTK_BUTTONBOX_DEFAULT ? bbox->child_ipad_y : ipad_y_default; nchildren = 0; nsecondaries = 0; children = GTK_BOX(bbox)->children; needed_width = child_min_width; needed_height = child_min_height; ipad_w = ipad_x * 2; ipad_h = ipad_y * 2; while (children) { child = children->data; children = children->next; if (gtk_widget_get_visible (child->widget)) { nchildren += 1; gtk_widget_size_request (child->widget, &child_requisition); if (child_requisition.width + ipad_w > needed_width) needed_width = child_requisition.width + ipad_w; if (child_requisition.height + ipad_h > needed_height) needed_height = child_requisition.height + ipad_h; if (child->is_secondary) nsecondaries++; } } if (nvis_children) *nvis_children = nchildren; if (nvis_secondaries) *nvis_secondaries = nsecondaries; if (width) *width = needed_width; if (height) *height = needed_height; } /* this is a kludge function to support the deprecated * gtk_[vh]button_box_set_layout_default() just in case anyone is still * using it (why?) */ static GtkButtonBoxStyle gtk_button_box_kludge_get_layout_default (GtkButtonBox *widget) { GtkOrientation orientation; orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)); if (orientation == GTK_ORIENTATION_HORIZONTAL) return _gtk_hbutton_box_get_layout_default (); else return _gtk_vbutton_box_get_layout_default (); } static void gtk_button_box_size_request (GtkWidget *widget, GtkRequisition *requisition) { GtkBox *box; GtkButtonBox *bbox; gint nvis_children; gint child_width; gint child_height; gint spacing; GtkButtonBoxStyle layout; GtkOrientation orientation; box = GTK_BOX (widget); bbox = GTK_BUTTON_BOX (widget); orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)); spacing = box->spacing; layout = bbox->layout_style != GTK_BUTTONBOX_DEFAULT_STYLE ? bbox->layout_style : gtk_button_box_kludge_get_layout_default (GTK_BUTTON_BOX (widget)); _gtk_button_box_child_requisition (widget, &nvis_children, NULL, &child_width, &child_height); if (nvis_children == 0) { requisition->width = 0; requisition->height = 0; } else { switch (layout) { case GTK_BUTTONBOX_SPREAD: if (orientation == GTK_ORIENTATION_HORIZONTAL) requisition->width = nvis_children*child_width + ((nvis_children+1)*spacing); else requisition->height = nvis_children*child_height + ((nvis_children+1)*spacing); break; case GTK_BUTTONBOX_EDGE: case GTK_BUTTONBOX_START: case GTK_BUTTONBOX_END: case GTK_BUTTONBOX_CENTER: if (orientation == GTK_ORIENTATION_HORIZONTAL) requisition->width = nvis_children*child_width + ((nvis_children-1)*spacing); else requisition->height = nvis_children*child_height + ((nvis_children-1)*spacing); break; default: g_assert_not_reached (); break; } if (orientation == GTK_ORIENTATION_HORIZONTAL) requisition->height = child_height; else requisition->width = child_width; } requisition->width += GTK_CONTAINER (box)->border_width * 2; requisition->height += GTK_CONTAINER (box)->border_width * 2; } static void gtk_button_box_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GtkBox *base_box; GtkButtonBox *box; GtkBoxChild *child; GList *children; GtkAllocation child_allocation; gint nvis_children; gint n_secondaries; gint child_width; gint child_height; gint x = 0; gint y = 0; gint secondary_x = 0; gint secondary_y = 0; gint width = 0; gint height = 0; gint childspace; gint childspacing = 0; GtkButtonBoxStyle layout; gint spacing; GtkOrientation orientation; orientation = gtk_orientable_get_orientation (GTK_ORIENTABLE (widget)); base_box = GTK_BOX (widget); box = GTK_BUTTON_BOX (widget); spacing = base_box->spacing; layout = box->layout_style != GTK_BUTTONBOX_DEFAULT_STYLE ? box->layout_style : gtk_button_box_kludge_get_layout_default (GTK_BUTTON_BOX (widget)); _gtk_button_box_child_requisition (widget, &nvis_children, &n_secondaries, &child_width, &child_height); widget->allocation = *allocation; if (orientation == GTK_ORIENTATION_HORIZONTAL) width = allocation->width - GTK_CONTAINER (box)->border_width*2; else height = allocation->height - GTK_CONTAINER (box)->border_width*2; switch (layout) { case GTK_BUTTONBOX_SPREAD: if (orientation == GTK_ORIENTATION_HORIZONTAL) { childspacing = (width - (nvis_children * child_width)) / (nvis_children + 1); x = allocation->x + GTK_CONTAINER (box)->border_width + childspacing; secondary_x = x + ((nvis_children - n_secondaries) * (child_width + childspacing)); } else { childspacing = (height - (nvis_children * child_height)) / (nvis_children + 1); y = allocation->y + GTK_CONTAINER (box)->border_width + childspacing; secondary_y = y + ((nvis_children - n_secondaries) * (child_height + childspacing)); } break; case GTK_BUTTONBOX_EDGE: if (orientation == GTK_ORIENTATION_HORIZONTAL) { if (nvis_children >= 2) { childspacing = (width - (nvis_children * child_width)) / (nvis_children - 1); x = allocation->x + GTK_CONTAINER (box)->border_width; secondary_x = x + ((nvis_children - n_secondaries) * (child_width + childspacing)); } else { /* one or zero children, just center */ childspacing = width; x = secondary_x = allocation->x + (allocation->width - child_width) / 2; } } else { if (nvis_children >= 2) { childspacing = (height - (nvis_children*child_height)) / (nvis_children-1); y = allocation->y + GTK_CONTAINER (box)->border_width; secondary_y = y + ((nvis_children - n_secondaries) * (child_height + childspacing)); } else { /* one or zero children, just center */ childspacing = height; y = secondary_y = allocation->y + (allocation->height - child_height) / 2; } } break; case GTK_BUTTONBOX_START: if (orientation == GTK_ORIENTATION_HORIZONTAL) { childspacing = spacing; x = allocation->x + GTK_CONTAINER (box)->border_width; secondary_x = allocation->x + allocation->width - child_width * n_secondaries - spacing * (n_secondaries - 1) - GTK_CONTAINER (box)->border_width; } else { childspacing = spacing; y = allocation->y + GTK_CONTAINER (box)->border_width; secondary_y = allocation->y + allocation->height - child_height * n_secondaries - spacing * (n_secondaries - 1) - GTK_CONTAINER (box)->border_width; } break; case GTK_BUTTONBOX_END: if (orientation == GTK_ORIENTATION_HORIZONTAL) { childspacing = spacing; x = allocation->x + allocation->width - child_width * (nvis_children - n_secondaries) - spacing * (nvis_children - n_secondaries - 1) - GTK_CONTAINER (box)->border_width; secondary_x = allocation->x + GTK_CONTAINER (box)->border_width; } else { childspacing = spacing; y = allocation->y + allocation->height - child_height * (nvis_children - n_secondaries) - spacing * (nvis_children - n_secondaries - 1) - GTK_CONTAINER (box)->border_width; secondary_y = allocation->y + GTK_CONTAINER (box)->border_width; } break; case GTK_BUTTONBOX_CENTER: if (orientation == GTK_ORIENTATION_HORIZONTAL) { childspacing = spacing; x = allocation->x + (allocation->width - (child_width * (nvis_children - n_secondaries) + spacing * (nvis_children - n_secondaries - 1))) / 2 + (n_secondaries * child_width + n_secondaries * spacing) / 2; secondary_x = allocation->x + GTK_CONTAINER (box)->border_width; } else { childspacing = spacing; y = allocation->y + (allocation->height - (child_height * (nvis_children - n_secondaries) + spacing * (nvis_children - n_secondaries - 1))) / 2 + (n_secondaries * child_height + n_secondaries * spacing) / 2; secondary_y = allocation->y + GTK_CONTAINER (box)->border_width; } break; default: g_assert_not_reached (); break; } if (orientation == GTK_ORIENTATION_HORIZONTAL) { y = allocation->y + (allocation->height - child_height) / 2; childspace = child_width + childspacing; } else { x = allocation->x + (allocation->width - child_width) / 2; childspace = child_height + childspacing; } children = GTK_BOX (box)->children; while (children) { child = children->data; children = children->next; if (gtk_widget_get_visible (child->widget)) { child_allocation.width = child_width; child_allocation.height = child_height; if (orientation == GTK_ORIENTATION_HORIZONTAL) { child_allocation.y = y; if (child->is_secondary) { child_allocation.x = secondary_x; secondary_x += childspace; } else { child_allocation.x = x; x += childspace; } if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) child_allocation.x = (allocation->x + allocation->width) - (child_allocation.x + child_width - allocation->x); } else { child_allocation.x = x; if (child->is_secondary) { child_allocation.y = secondary_y; secondary_y += childspace; } else { child_allocation.y = y; y += childspace; } } gtk_widget_size_allocate (child->widget, &child_allocation); } } } #define __GTK_BUTTON_BOX_C__ #include "gtkaliasdef.c"