Initial revision

1 files changed, 305 insertions, 0 deletions

diff --git a/gtk/gtkruler.c b/gtk/gtkruler.c
new file mode 100644
index 0000000000..dad0e11f64
--- /dev/null
+++ b/gtk/gtkruler.c
@@ -0,0 +1,305 @@
+/* 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 "gtkruler.h"
+
+
+static void gtk_ruler_class_init    (GtkRulerClass  *klass);
+static void gtk_ruler_init          (GtkRuler       *ruler);
+static void gtk_ruler_realize       (GtkWidget      *widget);
+static void gtk_ruler_unrealize     (GtkWidget      *widget);
+static void gtk_ruler_size_allocate (GtkWidget      *widget,
+				     GtkAllocation  *allocation);
+static gint gtk_ruler_expose        (GtkWidget      *widget,
+				     GdkEventExpose *event);
+static void gtk_ruler_make_pixmap   (GtkRuler       *ruler);
+
+
+static GtkRulerMetric ruler_metrics[] =
+{
+  {"Pixels", "Pi", 1.0, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
+  {"Inches", "In", 72.0, { 1, 2, 4, 8, 16, 32, 64, 128, 256, 512 }, { 1, 2, 4, 8, 16 }},
+  {"Centimeters", "Cn", 28.35, { 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000 }, { 1, 5, 10, 50, 100 }},
+};
+
+
+guint
+gtk_ruler_get_type ()
+{
+  static guint ruler_type = 0;
+
+  if (!ruler_type)
+    {
+      GtkTypeInfo ruler_info =
+      {
+	"GtkRuler",
+	sizeof (GtkRuler),
+	sizeof (GtkRulerClass),
+	(GtkClassInitFunc) gtk_ruler_class_init,
+	(GtkObjectInitFunc) gtk_ruler_init,
+	(GtkArgFunc) NULL,
+      };
+
+      ruler_type = gtk_type_unique (gtk_widget_get_type (), &ruler_info);
+    }
+
+  return ruler_type;
+}
+
+static void
+gtk_ruler_class_init (GtkRulerClass *class)
+{
+  GtkObjectClass *object_class;
+  GtkWidgetClass *widget_class;
+
+  object_class = (GtkObjectClass*) class;
+  widget_class = (GtkWidgetClass*) class;
+
+  widget_class->realize = gtk_ruler_realize;
+  widget_class->unrealize = gtk_ruler_unrealize;
+  widget_class->size_allocate = gtk_ruler_size_allocate;
+  widget_class->expose_event = gtk_ruler_expose;
+
+  class->draw_ticks = NULL;
+  class->draw_pos = NULL;
+}
+
+static void
+gtk_ruler_init (GtkRuler *ruler)
+{
+  ruler->backing_store = NULL;
+  ruler->non_gr_exp_gc = NULL;
+  ruler->xsrc = 0;
+  ruler->ysrc = 0;
+  ruler->slider_size = 0;
+  ruler->lower = 0;
+  ruler->upper = 0;
+  ruler->position = 0;
+  ruler->max_size = 0;
+
+  gtk_ruler_set_metric (ruler, GTK_PIXELS);
+}
+
+void
+gtk_ruler_set_metric (GtkRuler      *ruler,
+		      GtkMetricType  metric)
+{
+  g_return_if_fail (ruler != NULL);
+  g_return_if_fail (GTK_IS_RULER (ruler));
+
+  ruler->metric = &ruler_metrics[metric];
+
+  if (GTK_WIDGET_DRAWABLE (ruler))
+    gtk_widget_queue_draw (GTK_WIDGET (ruler));
+}
+
+void
+gtk_ruler_set_range (GtkRuler *ruler,
+		     gfloat    lower,
+		     gfloat    upper,
+		     gfloat    position,
+		     gfloat    max_size)
+{
+  g_return_if_fail (ruler != NULL);
+  g_return_if_fail (GTK_IS_RULER (ruler));
+
+  ruler->lower = lower;
+  ruler->upper = upper;
+  ruler->position = position;
+  ruler->max_size = max_size;
+
+  if (GTK_WIDGET_DRAWABLE (ruler))
+    gtk_widget_queue_draw (GTK_WIDGET (ruler));
+}
+
+void
+gtk_ruler_draw_ticks (GtkRuler *ruler)
+{
+  g_return_if_fail (ruler != NULL);
+  g_return_if_fail (GTK_IS_RULER (ruler));
+
+  if (GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_ticks)
+    (* GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_ticks) (ruler);
+}
+
+void
+gtk_ruler_draw_pos (GtkRuler *ruler)
+{
+  g_return_if_fail (ruler != NULL);
+  g_return_if_fail (GTK_IS_RULER (ruler));
+
+  if (GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_pos)
+    (* GTK_RULER_CLASS (GTK_OBJECT (ruler)->klass)->draw_pos) (ruler);
+}
+
+
+static void
+gtk_ruler_realize (GtkWidget *widget)
+{
+  GtkRuler *ruler;
+  GdkWindowAttr attributes;
+  gint attributes_mask;
+
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_RULER (widget));
+
+  ruler = GTK_RULER (widget);
+  GTK_WIDGET_SET_FLAGS (ruler, GTK_REALIZED);
+
+  attributes.window_type = GDK_WINDOW_CHILD;
+  attributes.x = widget->allocation.x;
+  attributes.y = widget->allocation.y;
+  attributes.width = widget->allocation.width;
+  attributes.height = widget->allocation.height;
+  attributes.wclass = GDK_INPUT_OUTPUT;
+  attributes.visual = gtk_widget_get_visual (widget);
+  attributes.colormap = gtk_widget_get_colormap (widget);
+  attributes.event_mask = gtk_widget_get_events (widget);
+  attributes.event_mask |= (GDK_EXPOSURE_MASK |
+			    GDK_POINTER_MOTION_MASK |
+			    GDK_POINTER_MOTION_HINT_MASK);
+
+  attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
+
+  widget->window = gdk_window_new (widget->parent->window, &attributes, attributes_mask);
+  gdk_window_set_user_data (widget->window, ruler);
+
+  widget->style = gtk_style_attach (widget->style, widget->window);
+  gtk_style_set_background (widget->style, widget->window, GTK_STATE_ACTIVE);
+
+  gtk_ruler_make_pixmap (ruler);
+}
+
+static void
+gtk_ruler_unrealize (GtkWidget *widget)
+{
+  GtkRuler *ruler;
+
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_RULER (widget));
+
+  ruler = GTK_RULER (widget);
+  GTK_WIDGET_UNSET_FLAGS (widget, GTK_REALIZED | GTK_MAPPED);
+
+  gtk_style_detach (widget->style);
+  gdk_window_destroy (widget->window);
+  widget->window = NULL;
+
+  if (ruler->backing_store)
+    gdk_pixmap_destroy (ruler->backing_store);
+  if (ruler->non_gr_exp_gc)
+    gdk_gc_destroy (ruler->non_gr_exp_gc);
+
+  ruler->backing_store = NULL;
+  ruler->non_gr_exp_gc = NULL;
+}
+
+static void
+gtk_ruler_size_allocate (GtkWidget     *widget,
+			 GtkAllocation *allocation)
+{
+  GtkRuler *ruler;
+
+  g_return_if_fail (widget != NULL);
+  g_return_if_fail (GTK_IS_RULER (widget));
+
+  ruler = GTK_RULER (widget);
+  widget->allocation = *allocation;
+
+  if (GTK_WIDGET_REALIZED (widget))
+    {
+      gdk_window_move_resize (widget->window,
+			      allocation->x, allocation->y,
+			      allocation->width, allocation->height);
+
+      gtk_ruler_make_pixmap (ruler);
+    }
+}
+
+static gint
+gtk_ruler_expose (GtkWidget      *widget,
+		  GdkEventExpose *event)
+{
+  GtkRuler *ruler;
+
+  g_return_val_if_fail (widget != NULL, FALSE);
+  g_return_val_if_fail (GTK_IS_RULER (widget), FALSE);
+  g_return_val_if_fail (event != NULL, FALSE);
+
+  if (GTK_WIDGET_DRAWABLE (widget))
+    {
+      ruler = GTK_RULER (widget);
+
+      gdk_draw_rectangle (ruler->backing_store,
+			  widget->style->bg_gc[GTK_STATE_NORMAL],
+			  TRUE, 0, 0,
+			  widget->allocation.width,
+			  widget->allocation.height);
+
+      gtk_ruler_draw_ticks (ruler);
+
+      gtk_draw_shadow (widget->style, ruler->backing_store,
+		       GTK_STATE_NORMAL, GTK_SHADOW_OUT, 0, 0,
+		       widget->allocation.width,
+		       widget->allocation.height);
+
+      gdk_draw_pixmap (widget->window,
+		       ruler->non_gr_exp_gc,
+		       ruler->backing_store,
+		       0, 0, 0, 0,
+		       widget->allocation.width,
+		       widget->allocation.height);
+
+      gtk_ruler_draw_pos (ruler);
+    }
+
+  return FALSE;
+}
+
+static void
+gtk_ruler_make_pixmap (GtkRuler *ruler)
+{
+  GtkWidget *widget;
+  gint width;
+  gint height;
+
+  widget = GTK_WIDGET (ruler);
+
+  if (ruler->backing_store)
+    {
+      gdk_window_get_size (ruler->backing_store, &width, &height);
+      if ((width == widget->allocation.width) &&
+	  (height == widget->allocation.height))
+	return;
+
+      gdk_pixmap_destroy (ruler->backing_store);
+    }
+
+  ruler->backing_store = gdk_pixmap_new (widget->window,
+					 widget->allocation.width,
+					 widget->allocation.height,
+					 -1);
+
+  ruler->xsrc = 0;
+  ruler->ysrc = 0;
+
+  if (!ruler->non_gr_exp_gc)
+    {
+      ruler->non_gr_exp_gc = gdk_gc_new (widget->window);
+      gdk_gc_set_exposures (ruler->non_gr_exp_gc, FALSE);
+    }
+}