Initial revision

1 files changed, 193 insertions, 0 deletions

diff --git a/gtk/gtkalignment.c b/gtk/gtkalignment.c
new file mode 100644
index 000000000..b562cff77
--- /dev/null
+++ b/gtk/gtkalignment.c
@@ -0,0 +1,193 @@
+/* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include "gtkalignment.h"
+
+
+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);
+
+
+guint
+gtk_alignment_get_type ()
+{
+  static guint alignment_type = 0;
+
+  if (!alignment_type)
+    {
+      GtkTypeInfo alignment_info =
+      {
+	"GtkAlignment",
+	sizeof (GtkAlignment),
+	sizeof (GtkAlignmentClass),
+	(GtkClassInitFunc) gtk_alignment_class_init,
+	(GtkObjectInitFunc) gtk_alignment_init,
+	(GtkArgFunc) NULL,
+      };
+
+      alignment_type = gtk_type_unique (gtk_bin_get_type (), &alignment_info);
+    }
+
+  return alignment_type;
+}
+
+static void
+gtk_alignment_class_init (GtkAlignmentClass *class)
+{
+  GtkWidgetClass *widget_class;
+
+  widget_class = (GtkWidgetClass*) class;
+
+  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 | GTK_BASIC);
+
+  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);
+}
+
+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))
+    {
+      gtk_widget_size_request (bin->child, &bin->child->requisition);
+
+      requisition->width += bin->child->requisition.width;
+      requisition->height += bin->child->requisition.height;
+    }
+}
+
+static void
+gtk_alignment_size_allocate (GtkWidget     *widget,
+			     GtkAllocation *allocation)
+{
+  GtkAlignment *alignment;
+  GtkBin *bin;
+  GtkAllocation child_allocation;
+  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))
+    {
+      x = GTK_CONTAINER (alignment)->border_width;
+      y = GTK_CONTAINER (alignment)->border_width;
+      width = allocation->width - 2 * x;
+      height = allocation->height - 2 * y;
+
+      if (width > bin->child->requisition.width)
+	child_allocation.width = (bin->child->requisition.width *
+				  (1.0 - alignment->xscale) +
+				  width * alignment->xscale);
+      else
+	child_allocation.width = width;
+
+      if (height > bin->child->requisition.height)
+	child_allocation.height = (bin->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);
+    }
+}