1 files changed, 510 insertions, 0 deletions

diff --git a/gtk/gtkscrolledwindow.c b/gtk/gtkscrolledwindow.c
new file mode 100644
index 000000000..79cc67aaf
--- /dev/null
+++ b/gtk/gtkscrolledwindow.c
@@ -0,0 +1,510 @@
+/* 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 "gtkscrolledwindow.h"
+#include "gtksignal.h"
+
+
+#define SCROLLBAR_SPACING  5
+
+
+static void gtk_scrolled_window_class_init         (GtkScrolledWindowClass *klass);
+static void gtk_scrolled_window_init               (GtkScrolledWindow      *scrolled_window);
+static void gtk_scrolled_window_destroy            (GtkObject              *object);
+static void gtk_scrolled_window_map                (GtkWidget              *widget);
+static void gtk_scrolled_window_unmap              (GtkWidget              *widget);
+static void gtk_scrolled_window_draw               (GtkWidget              *widget,
+						    GdkRectangle           *area);
+static void gtk_scrolled_window_size_request       (GtkWidget              *widget,
+						    GtkRequisition         *requisition);
+static void gtk_scrolled_window_size_allocate      (GtkWidget              *widget,
+						    GtkAllocation          *allocation);
+static void gtk_scrolled_window_add                (GtkContainer           *container,
+						    GtkWidget              *widget);
+static void gtk_scrolled_window_remove             (GtkContainer           *container,
+						    GtkWidget              *widget);
+static void gtk_scrolled_window_foreach            (GtkContainer           *container,
+						    GtkCallback             callback,
+						    gpointer                callback_data);
+static void gtk_scrolled_window_viewport_allocate  (GtkWidget              *widget,
+						    GtkAllocation          *allocation);
+static void gtk_scrolled_window_adjustment_changed (GtkAdjustment          *adjustment,
+						    gpointer                data);
+
+
+static GtkContainerClass *parent_class = NULL;
+
+
+guint
+gtk_scrolled_window_get_type ()
+{
+  static guint scrolled_window_type = 0;
+
+  if (!scrolled_window_type)
+    {
+      GtkTypeInfo scrolled_window_info =
+      {
+	"GtkScrolledWindow",
+	sizeof (GtkScrolledWindow),
+	sizeof (GtkScrolledWindowClass),
+	(GtkClassInitFunc) gtk_scrolled_window_class_init,
+	(GtkObjectInitFunc) gtk_scrolled_window_init,
+	(GtkArgFunc) NULL,
+      };
+
+      scrolled_window_type = gtk_type_unique (gtk_container_get_type (), &scrolled_window_info);
+    }
+
+  return scrolled_window_type;
+}
+
+static void
+gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
+{
+  GtkObjectClass *object_class;
+  GtkWidgetClass *widget_class;
+  GtkContainerClass *container_class;
+
+  object_class = (GtkObjectClass*) class;
+  widget_class = (GtkWidgetClass*) class;
+  container_class = (GtkContainerClass*) class;
+
+  parent_class = gtk_type_class (gtk_container_get_type ());
+
+  object_class->destroy = gtk_scrolled_window_destroy;
+
+  widget_class->map = gtk_scrolled_window_map;
+  widget_class->unmap = gtk_scrolled_window_unmap;
+  widget_class->draw = gtk_scrolled_window_draw;
+  widget_class->size_request = gtk_scrolled_window_size_request;
+  widget_class->size_allocate = gtk_scrolled_window_size_allocate;
+
+  container_class->add = gtk_scrolled_window_add;
+  container_class->remove = gtk_scrolled_window_remove;
+  container_class->foreach = gtk_scrolled_window_foreach;
+}
+
+static void
+gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window)
+{
+  GTK_WIDGET_SET_FLAGS (scrolled_window, GTK_NO_WINDOW);
+
+  scrolled_window->hscrollbar = NULL;
+  scrolled_window->vscrollbar = NULL;
+  scrolled_window->hscrollbar_policy = GTK_POLICY_ALWAYS;
+  scrolled_window->vscrollbar_policy = GTK_POLICY_ALWAYS;
+}
+
+GtkWidget*
+gtk_scrolled_window_new (GtkAdjustment *hadjustment,
+			 GtkAdjustment *vadjustment)
+{
+  GtkScrolledWindow *scrolled_window;
+
+  scrolled_window = gtk_type_new (gtk_scrolled_window_get_type ());
+
+  scrolled_window->viewport = gtk_viewport_new (hadjustment, vadjustment);
+  hadjustment = gtk_viewport_get_hadjustment (GTK_VIEWPORT (scrolled_window->viewport));
+  vadjustment = gtk_viewport_get_vadjustment (GTK_VIEWPORT (scrolled_window->viewport));
+
+  gtk_signal_connect (GTK_OBJECT (hadjustment), "changed",
+		      (GtkSignalFunc) gtk_scrolled_window_adjustment_changed,
+		      (gpointer) scrolled_window);
+  gtk_signal_connect (GTK_OBJECT (vadjustment), "changed",
+		      (GtkSignalFunc) gtk_scrolled_window_adjustment_changed,
+		      (gpointer) scrolled_window);
+
+  scrolled_window->hscrollbar = gtk_hscrollbar_new (hadjustment);
+  scrolled_window->vscrollbar = gtk_vscrollbar_new (vadjustment);
+
+  gtk_widget_set_parent (scrolled_window->viewport, GTK_WIDGET (scrolled_window));
+  gtk_widget_set_parent (scrolled_window->hscrollbar, GTK_WIDGET (scrolled_window));
+  gtk_widget_set_parent (scrolled_window->vscrollbar, GTK_WIDGET (scrolled_window));
+
+  gtk_widget_show (scrolled_window->viewport);
+  gtk_widget_show (scrolled_window->hscrollbar);
+  gtk_widget_show (scrolled_window->vscrollbar);
+
+  return GTK_WIDGET (scrolled_window);
+}
+
+GtkAdjustment*
+gtk_scrolled_window_get_hadjustment (GtkScrolledWindow *scrolled_window)
+{
+  g_return_val_if_fail (scrolled_window != NULL, NULL);
+  g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
+
+  return gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar));
+}
+
+GtkAdjustment*
+gtk_scrolled_window_get_vadjustment (GtkScrolledWindow *scrolled_window)
+{
+  g_return_val_if_fail (scrolled_window != NULL, NULL);
+  g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
+
+  return gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar));
+}
+
+void
+gtk_scrolled_window_set_policy (GtkScrolledWindow *scrolled_window,
+				GtkPolicyType      hscrollbar_policy,
+				GtkPolicyType      vscrollbar_policy)
+{
+  g_return_if_fail (scrolled_window != NULL);
+  g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
+
+  if ((scrolled_window->hscrollbar_policy != hscrollbar_policy) ||
+      (scrolled_window->vscrollbar_policy != vscrollbar_policy))
+    {
+      scrolled_window->hscrollbar_policy = hscrollbar_policy;
+      scrolled_window->vscrollbar_policy = vscrollbar_policy;
+
+      if (GTK_WIDGET (scrolled_window)->parent)
+	gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
+    }
+}
+
+
+static void
+gtk_scrolled_window_destroy (GtkObject *object)
+{
+  GtkScrolledWindow *scrolled_window;
+
+  g_return_if_fail (object != NULL);
+  g_return_if_fail (GTK_IS_SCROLLED_WINDOW (object));
+
+  scrolled_window = GTK_SCROLLED_WINDOW (object);
+
+  gtk_widget_destroy (scrolled_window->viewport);
+  gtk_widget_destroy (scrolled_window->hscrollbar);
+  gtk_widget_destroy (scrolled_window->vscrollbar);
+
+  if (GTK_OBJECT_CLASS (parent_class)->destroy)
+    (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
+}
+
+static void
+gtk_scrolled_window_map (GtkWidget *widget)
+{
+  GtkScrolledWindow *scrolled_window;
+
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
+
+  if (!GTK_WIDGET_MAPPED (widget))
+    {
+      GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
+      scrolled_window = GTK_SCROLLED_WINDOW (widget);
+
+      if (GTK_WIDGET_VISIBLE (scrolled_window->viewport) &&
+	  !GTK_WIDGET_MAPPED (scrolled_window->viewport))
+	gtk_widget_map (scrolled_window->viewport);
+
+      if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar) &&
+	  !GTK_WIDGET_MAPPED (scrolled_window->hscrollbar))
+	gtk_widget_map (scrolled_window->hscrollbar);
+
+      if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar) &&
+	  !GTK_WIDGET_MAPPED (scrolled_window->vscrollbar))
+	gtk_widget_map (scrolled_window->vscrollbar);
+    }
+}
+
+static void
+gtk_scrolled_window_unmap (GtkWidget *widget)
+{
+  GtkScrolledWindow *scrolled_window;
+
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
+
+  if (GTK_WIDGET_MAPPED (widget))
+    {
+      GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
+      scrolled_window = GTK_SCROLLED_WINDOW (widget);
+
+      if (GTK_WIDGET_MAPPED (scrolled_window->viewport))
+	gtk_widget_unmap (scrolled_window->viewport);
+
+      if (GTK_WIDGET_MAPPED (scrolled_window->hscrollbar))
+	gtk_widget_unmap (scrolled_window->hscrollbar);
+
+      if (GTK_WIDGET_MAPPED (scrolled_window->vscrollbar))
+	gtk_widget_unmap (scrolled_window->vscrollbar);
+    }
+}
+
+static void
+gtk_scrolled_window_draw (GtkWidget    *widget,
+			  GdkRectangle *area)
+{
+  GtkScrolledWindow *scrolled_window;
+  GdkRectangle child_area;
+
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
+  g_return_if_fail (area != NULL);
+
+  if (GTK_WIDGET_DRAWABLE (widget))
+    {
+      scrolled_window = GTK_SCROLLED_WINDOW (widget);
+
+      if (gtk_widget_intersect (scrolled_window->viewport, area, &child_area))
+	gtk_widget_draw (scrolled_window->viewport, &child_area);
+
+      if (gtk_widget_intersect (scrolled_window->hscrollbar, area, &child_area))
+	gtk_widget_draw (scrolled_window->hscrollbar, &child_area);
+
+      if (gtk_widget_intersect (scrolled_window->vscrollbar, area, &child_area))
+	gtk_widget_draw (scrolled_window->vscrollbar, &child_area);
+    }
+}
+
+static void
+gtk_scrolled_window_size_request (GtkWidget      *widget,
+				  GtkRequisition *requisition)
+{
+  GtkScrolledWindow *scrolled_window;
+  gint extra_height;
+  gint extra_width;
+
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
+  g_return_if_fail (requisition != NULL);
+
+  scrolled_window = GTK_SCROLLED_WINDOW (widget);
+
+  requisition->width = 0;
+  requisition->height = 0;
+
+  if (GTK_WIDGET_VISIBLE (scrolled_window->viewport))
+    {
+      gtk_widget_size_request (scrolled_window->viewport, &scrolled_window->viewport->requisition);
+
+      requisition->width += scrolled_window->viewport->requisition.width;
+      requisition->height += scrolled_window->viewport->requisition.height;
+    }
+
+  extra_width = 0;
+  extra_height = 0;
+
+  if ((scrolled_window->hscrollbar_policy == GTK_POLICY_AUTOMATIC) ||
+      GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
+    {
+      gtk_widget_size_request (scrolled_window->hscrollbar,
+			       &scrolled_window->hscrollbar->requisition);
+
+      requisition->width = MAX (requisition->width, scrolled_window->hscrollbar->requisition.width);
+      extra_height = SCROLLBAR_SPACING + scrolled_window->hscrollbar->requisition.height;
+    }
+
+  if ((scrolled_window->vscrollbar_policy == GTK_POLICY_AUTOMATIC) ||
+      GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
+    {
+      gtk_widget_size_request (scrolled_window->vscrollbar,
+			       &scrolled_window->vscrollbar->requisition);
+
+      requisition->height = MAX (requisition->height, scrolled_window->vscrollbar->requisition.height);
+      extra_width = SCROLLBAR_SPACING + scrolled_window->vscrollbar->requisition.width;
+    }
+
+  requisition->width += GTK_CONTAINER (widget)->border_width * 2 + extra_width;
+  requisition->height += GTK_CONTAINER (widget)->border_width * 2 + extra_height;
+}
+
+static void
+gtk_scrolled_window_size_allocate (GtkWidget     *widget,
+				   GtkAllocation *allocation)
+{
+  GtkScrolledWindow *scrolled_window;
+  GtkAllocation viewport_allocation;
+  GtkAllocation child_allocation;
+  guint previous_hvis;
+  guint previous_vvis;
+
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
+  g_return_if_fail (allocation != NULL);
+
+  scrolled_window = GTK_SCROLLED_WINDOW (widget);
+  widget->allocation = *allocation;
+
+  gtk_scrolled_window_viewport_allocate (widget, &viewport_allocation);
+
+  gtk_container_disable_resize (GTK_CONTAINER (scrolled_window));
+
+  if (GTK_WIDGET_VISIBLE (scrolled_window->viewport))
+    {
+      do {
+	gtk_scrolled_window_viewport_allocate (widget, &viewport_allocation);
+
+	child_allocation.x = viewport_allocation.x + allocation->x;
+	child_allocation.y = viewport_allocation.y + allocation->y;
+	child_allocation.width = viewport_allocation.width;
+	child_allocation.height = viewport_allocation.height;
+
+	previous_hvis = GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar);
+	previous_vvis = GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar);
+
+	gtk_widget_size_allocate (scrolled_window->viewport, &child_allocation);
+      } while ((previous_hvis != GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar)) ||
+	       (previous_vvis != GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar)));
+    }
+
+  if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
+    {
+      child_allocation.x = viewport_allocation.x;
+      child_allocation.y = viewport_allocation.y + viewport_allocation.height + SCROLLBAR_SPACING;
+      child_allocation.width = viewport_allocation.width;
+      child_allocation.height = scrolled_window->hscrollbar->requisition.height;
+      child_allocation.x += allocation->x;
+      child_allocation.y += allocation->y;
+
+      gtk_widget_size_allocate (scrolled_window->hscrollbar, &child_allocation);
+    }
+
+  if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
+    {
+      child_allocation.x = viewport_allocation.x + viewport_allocation.width + SCROLLBAR_SPACING;
+      child_allocation.y = viewport_allocation.y;
+      child_allocation.width = scrolled_window->vscrollbar->requisition.width;
+      child_allocation.height = viewport_allocation.height;
+      child_allocation.x += allocation->x;
+      child_allocation.y += allocation->y;
+
+      gtk_widget_size_allocate (scrolled_window->vscrollbar, &child_allocation);
+    }
+
+  gtk_container_enable_resize (GTK_CONTAINER (scrolled_window));
+}
+
+static void
+gtk_scrolled_window_add (GtkContainer *container,
+			 GtkWidget    *widget)
+{
+  GtkScrolledWindow *scrolled_window;
+
+  g_return_if_fail (container != NULL);
+  g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
+  g_return_if_fail (widget != NULL);
+
+  scrolled_window = GTK_SCROLLED_WINDOW (container);
+  gtk_container_add (GTK_CONTAINER (scrolled_window->viewport), widget);
+}
+
+static void
+gtk_scrolled_window_remove (GtkContainer *container,
+			    GtkWidget    *widget)
+{
+  GtkScrolledWindow *scrolled_window;
+
+  g_return_if_fail (container != NULL);
+  g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
+  g_return_if_fail (widget != NULL);
+
+  scrolled_window = GTK_SCROLLED_WINDOW (container);
+  gtk_container_remove (GTK_CONTAINER (scrolled_window->viewport), widget);
+}
+
+static void
+gtk_scrolled_window_foreach (GtkContainer *container,
+			     GtkCallback   callback,
+			     gpointer      callback_data)
+{
+  GtkScrolledWindow *scrolled_window;
+
+  g_return_if_fail (container != NULL);
+  g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
+  g_return_if_fail (callback != NULL);
+
+  scrolled_window = GTK_SCROLLED_WINDOW (container);
+
+  (* callback) (scrolled_window->viewport, callback_data);
+}
+
+static void
+gtk_scrolled_window_viewport_allocate (GtkWidget     *widget,
+				       GtkAllocation *allocation)
+{
+  GtkScrolledWindow *scrolled_window;
+
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (allocation != NULL);
+
+  scrolled_window = GTK_SCROLLED_WINDOW (widget);
+
+  allocation->x = GTK_CONTAINER (widget)->border_width;
+  allocation->y = GTK_CONTAINER (widget)->border_width;
+  allocation->width = widget->allocation.width - allocation->x * 2;
+  allocation->height = widget->allocation.height - allocation->y * 2;
+
+  if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
+    allocation->width -= scrolled_window->vscrollbar->requisition.width + SCROLLBAR_SPACING;
+  if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
+    allocation->height -= scrolled_window->hscrollbar->requisition.height + SCROLLBAR_SPACING;
+}
+
+static void
+gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
+					gpointer       data)
+{
+  GtkScrolledWindow *scrolled_win;
+  GtkWidget *scrollbar;
+  gint hide_scrollbar;
+  gint policy;
+
+  g_return_if_fail (adjustment != NULL);
+  g_return_if_fail (data != NULL);
+
+  scrolled_win = GTK_SCROLLED_WINDOW (data);
+
+  if (adjustment == gtk_range_get_adjustment (GTK_RANGE (scrolled_win->hscrollbar)))
+    {
+      scrollbar = scrolled_win->hscrollbar;
+      policy = scrolled_win->hscrollbar_policy;
+    }
+  else if (adjustment == gtk_range_get_adjustment (GTK_RANGE (scrolled_win->vscrollbar)))
+    {
+      scrollbar = scrolled_win->vscrollbar;
+      policy = scrolled_win->vscrollbar_policy;
+    }
+  else
+    {
+      g_warning ("could not determine which adjustment scrollbar received change signal for");
+      return;
+    }
+
+  if (policy == GTK_POLICY_AUTOMATIC)
+    {
+      hide_scrollbar = FALSE;
+
+      if ((adjustment->upper - adjustment->lower) <= adjustment->page_size)
+	hide_scrollbar = TRUE;
+
+      if (hide_scrollbar)
+	{
+	  if (GTK_WIDGET_VISIBLE (scrollbar))
+	    gtk_widget_hide (scrollbar);
+	}
+      else
+	{
+	  if (!GTK_WIDGET_VISIBLE (scrollbar))
+	    gtk_widget_show (scrollbar);
+	}
+    }
+}