Fix resize and change of scroll bar width for Gtk3.

* configure.in: Add emacsgtkfixed.o to GTK_OBJ if HAVE_GTK3.

* src/emacsgtkfixed.c, src/emacsgtkfixed.h: New files.

* src/gtkutil.c: Include src/emacsgtkfixed.h if HAVE_GTK3.
(int_gtk_range_get_value): Move to the scroll bar part of the file.
(style_changed_cb): Call update_theme_scrollbar_width and call
x_set_scroll_bar_default_width and xg_frame_set_char_size for
all frames.
(xg_create_frame_widgets): Call emacs_fixed_new if HAVE_GTK3 (Bug#8505).
Call gtk_window_set_resizable if HAVE_GTK3.
(x_wm_set_size_hint): Call emacs_fixed_set_min_size with min width
and height if HAVE_GTK3 (Bug#8505).
(scroll_bar_width_for_theme): New variable.
(update_theme_scrollbar_width): New function.
(xg_get_default_scrollbar_width): Move code to
update_theme_scrollbar_width, just return scroll_bar_width_for_theme.
(xg_initialize): Call update_theme_scrollbar_width.

* src/gtkutil.h (xg_get_default_scrollbar_width): Remove argument.

* src/xfns.c (x_set_scroll_bar_default_width): Remove argument to
xg_get_default_scrollbar_width.

1 files changed, 123 insertions, 0 deletions

diff --git a/src/emacsgtkfixed.c b/src/emacsgtkfixed.c
new file mode 100644
index 00000000000..fe3514bce93
--- /dev/null
+++ b/src/emacsgtkfixed.c
@@ -0,0 +1,123 @@
+/* A Gtk Widget that inherits GtkFixed, but can be shrinked. 
+
+Copyright (C) 2011  Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+GNU Emacs 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "emacsgtkfixed.h"
+
+
+struct _EmacsFixedPrivate
+{
+  int minwidth, minheight;
+};
+
+
+static void emacs_fixed_get_preferred_width  (GtkWidget *widget,
+                                              gint      *minimum,
+                                              gint      *natural);
+static void emacs_fixed_get_preferred_height (GtkWidget *widget,
+                                              gint      *minimum,
+                                              gint      *natural);
+G_DEFINE_TYPE (EmacsFixed, emacs_fixed, GTK_TYPE_FIXED)
+
+static void
+emacs_fixed_class_init (EmacsFixedClass *klass)
+{
+  GtkWidgetClass *widget_class;
+  GtkFixedClass *fixed_class;
+
+  widget_class = (GtkWidgetClass*) klass;
+  fixed_class = (GtkFixedClass*) klass;
+
+  widget_class->get_preferred_width = emacs_fixed_get_preferred_width;
+  widget_class->get_preferred_height = emacs_fixed_get_preferred_height;
+  g_type_class_add_private (klass, sizeof (EmacsFixedPrivate));
+}
+
+static GType
+emacs_fixed_child_type (GtkFixed *container)
+{
+  return GTK_TYPE_WIDGET;
+}
+
+static void
+emacs_fixed_init (EmacsFixed *fixed)
+{
+  fixed->priv = G_TYPE_INSTANCE_GET_PRIVATE (fixed, EMACS_TYPE_FIXED,
+                                             EmacsFixedPrivate);
+  fixed->priv->minwidth = fixed->priv->minheight = 0;
+}
+
+/**
+ * emacs_fixed_new:
+ *
+ * Creates a new #EmacsFixed.
+ *
+ * Returns: a new #EmacsFixed.
+ */
+GtkWidget*
+emacs_fixed_new (void)
+{
+  return g_object_new (EMACS_TYPE_FIXED, NULL);
+}
+
+static GtkWidgetClass *
+get_parent_class (EmacsFixed *fixed)
+{
+  EmacsFixedClass *klass = EMACS_FIXED_GET_CLASS (fixed);
+  GtkFixedClass *parent_class = g_type_class_peek_parent (klass);
+  return (GtkWidgetClass*) parent_class;
+}
+
+static void
+emacs_fixed_get_preferred_width (GtkWidget *widget,
+                                 gint      *minimum,
+                                 gint      *natural)
+{
+  EmacsFixed *fixed = EMACS_FIXED (widget);
+  EmacsFixedPrivate *priv = fixed->priv;
+  GtkWidgetClass *widget_class = get_parent_class (fixed);
+  widget_class->get_preferred_width (widget, minimum, natural);
+  if (minimum) *minimum = priv->minwidth;
+}
+
+static void
+emacs_fixed_get_preferred_height (GtkWidget *widget,
+                                  gint      *minimum,
+                                  gint      *natural)
+{
+  EmacsFixed *fixed = EMACS_FIXED (widget);
+  EmacsFixedPrivate *priv = fixed->priv;
+  GtkWidgetClass *widget_class = get_parent_class (fixed);
+  widget_class->get_preferred_height (widget, minimum, natural);
+  if (minimum) *minimum = priv->minheight;
+}
+
+void
+emacs_fixed_set_min_size (EmacsFixed *widget, int width, int height)
+{
+  EmacsFixedPrivate *priv = widget->priv;
+  GtkWidgetClass *widget_class = get_parent_class (widget);
+  int mw, nw, mh, nh;
+
+  widget_class->get_preferred_height (GTK_WIDGET (widget), &mh, &nh);
+  widget_class->get_preferred_width (GTK_WIDGET (widget), &mw, &nw);
+
+  /* Gtk complains if min size is less than natural size.  */
+  if (width <= nw) priv->minwidth = width;
+  if (height <= nh) priv->minheight = height;
+}