/* 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 Library 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 * Library General Public License for more details. * * You should have received a copy of the GNU Library 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. */ #include "gtkalignment.h" enum { ARG_0, ARG_XALIGN, ARG_YALIGN, ARG_XSCALE, ARG_YSCALE }; static void gtk_alignment_class_init (GtkAlignmentClass *klass); static void gtk_alignment_init (GtkAlignment *alignment); static void gtk_alignment_size_request (GtkWidget *widget, GtkRequisition *requisition); static void gtk_alignment_size_allocate (GtkWidget *widget, GtkAllocation *allocation); static void gtk_alignment_set_arg (GtkObject *object, GtkArg *arg, guint arg_id); static void gtk_alignment_get_arg (GtkObject *object, GtkArg *arg, guint arg_id); GtkType gtk_alignment_get_type (void) { static GtkType alignment_type = 0; if (!alignment_type) { static const GtkTypeInfo alignment_info = { "GtkAlignment", sizeof (GtkAlignment), sizeof (GtkAlignmentClass), (GtkClassInitFunc) gtk_alignment_class_init, (GtkObjectInitFunc) gtk_alignment_init, /* reserved_1 */ NULL, /* reserved_2 */ NULL, (GtkClassInitFunc) NULL, }; alignment_type = gtk_type_unique (GTK_TYPE_BIN, &alignment_info); } return alignment_type; } static void gtk_alignment_class_init (GtkAlignmentClass *class) { GtkObjectClass *object_class; GtkWidgetClass *widget_class; object_class = (GtkObjectClass*) class; widget_class = (GtkWidgetClass*) class; gtk_object_add_arg_type ("GtkAlignment::xalign", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_XALIGN); gtk_object_add_arg_type ("GtkAlignment::yalign", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_YALIGN); gtk_object_add_arg_type ("GtkAlignment::xscale", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_XSCALE); gtk_object_add_arg_type ("GtkAlignment::yscale", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_YSCALE); object_class->set_arg = gtk_alignment_set_arg; object_class->get_arg = gtk_alignment_get_arg; widget_class->size_request = gtk_alignment_size_request; widget_class->size_allocate = gtk_alignment_size_allocate; } static void gtk_alignment_init (GtkAlignment *alignment) { GTK_WIDGET_SET_FLAGS (alignment, GTK_NO_WINDOW); alignment->xalign = 0.5; alignment->yalign = 0.5; alignment->xscale = 1.0; alignment->yscale = 1.0; } GtkWidget* gtk_alignment_new (gfloat xalign, gfloat yalign, gfloat xscale, gfloat yscale) { GtkAlignment *alignment; alignment = gtk_type_new (gtk_alignment_get_type ()); alignment->xalign = CLAMP (xalign, 0.0, 1.0); alignment->yalign = CLAMP (yalign, 0.0, 1.0); alignment->xscale = CLAMP (xscale, 0.0, 1.0); alignment->yscale = CLAMP (yscale, 0.0, 1.0); return GTK_WIDGET (alignment); } static void gtk_alignment_set_arg (GtkObject *object, GtkArg *arg, guint arg_id) { GtkAlignment *alignment; alignment = GTK_ALIGNMENT (object); switch (arg_id) { case ARG_XALIGN: gtk_alignment_set (alignment, GTK_VALUE_FLOAT (*arg), alignment->yalign, alignment->xscale, alignment->yscale); break; case ARG_YALIGN: gtk_alignment_set (alignment, alignment->xalign, GTK_VALUE_FLOAT (*arg), alignment->xscale, alignment->yscale); break; case ARG_XSCALE: gtk_alignment_set (alignment, alignment->xalign, alignment->yalign, GTK_VALUE_FLOAT (*arg), alignment->yscale); break; case ARG_YSCALE: gtk_alignment_set (alignment, alignment->xalign, alignment->yalign, alignment->xscale, GTK_VALUE_FLOAT (*arg)); break; default: break; } } static void gtk_alignment_get_arg (GtkObject *object, GtkArg *arg, guint arg_id) { GtkAlignment *alignment; alignment = GTK_ALIGNMENT (object); switch (arg_id) { case ARG_XALIGN: GTK_VALUE_FLOAT (*arg) = alignment->xalign; break; case ARG_YALIGN: GTK_VALUE_FLOAT (*arg) = alignment->yalign; break; case ARG_XSCALE: GTK_VALUE_FLOAT (*arg) = alignment->xscale; break; case ARG_YSCALE: GTK_VALUE_FLOAT (*arg) = alignment->yscale; break; default: arg->type = GTK_TYPE_INVALID; break; } } void gtk_alignment_set (GtkAlignment *alignment, gfloat xalign, gfloat yalign, gfloat xscale, gfloat yscale) { g_return_if_fail (alignment != NULL); g_return_if_fail (GTK_IS_ALIGNMENT (alignment)); xalign = CLAMP (xalign, 0.0, 1.0); yalign = CLAMP (yalign, 0.0, 1.0); xscale = CLAMP (xscale, 0.0, 1.0); yscale = CLAMP (yscale, 0.0, 1.0); if ((alignment->xalign != xalign) || (alignment->yalign != yalign) || (alignment->xscale != xscale) || (alignment->yscale != yscale)) { alignment->xalign = xalign; alignment->yalign = yalign; alignment->xscale = xscale; alignment->yscale = yscale; gtk_widget_size_allocate (GTK_WIDGET (alignment), &(GTK_WIDGET (alignment)->allocation)); gtk_widget_queue_draw (GTK_WIDGET (alignment)); } } static void gtk_alignment_size_request (GtkWidget *widget, GtkRequisition *requisition) { GtkAlignment *alignment; GtkBin *bin; g_return_if_fail (widget != NULL); g_return_if_fail (GTK_IS_ALIGNMENT (widget)); g_return_if_fail (requisition != NULL); alignment = GTK_ALIGNMENT (widget); bin = GTK_BIN (widget); requisition->width = GTK_CONTAINER (widget)->border_width * 2; requisition->height = GTK_CONTAINER (widget)->border_width * 2; if (bin->child && GTK_WIDGET_VISIBLE (bin->child)) { GtkRequisition child_requisition; gtk_widget_size_request (bin->child, &child_requisition); requisition->width += child_requisition.width; requisition->height += child_requisition.height; } } static void gtk_alignment_size_allocate (GtkWidget *widget, GtkAllocation *allocation) { GtkAlignment *alignment; GtkBin *bin; GtkAllocation child_allocation; GtkRequisition child_requisition; gint width, height; gint x, y; g_return_if_fail (widget != NULL); g_return_if_fail (GTK_IS_ALIGNMENT (widget)); g_return_if_fail (allocation != NULL); widget->allocation = *allocation; alignment = GTK_ALIGNMENT (widget); bin = GTK_BIN (widget); if (bin->child && GTK_WIDGET_VISIBLE (bin->child)) { gtk_widget_get_child_requisition (bin->child, &child_requisition); x = GTK_CONTAINER (alignment)->border_width; y = GTK_CONTAINER (alignment)->border_width; width = MAX (allocation->width - 2 * x, 0); height = MAX (allocation->height - 2 * y, 0); if (width > child_requisition.width) child_allocation.width = (child_requisition.width * (1.0 - alignment->xscale) + width * alignment->xscale); else child_allocation.width = width; if (height > child_requisition.height) child_allocation.height = (child_requisition.height * (1.0 - alignment->yscale) + height * alignment->yscale); else child_allocation.height = height; child_allocation.x = alignment->xalign * (width - child_allocation.width) + allocation->x + x; child_allocation.y = alignment->yalign * (height - child_allocation.height) + allocation->y + y; gtk_widget_size_allocate (bin->child, &child_allocation); } }