Bug 553585 – Add orientation API to GtkRuler

2008-10-02  Michael Natterer  <mitch@imendio.com>

	Bug 553585 – Add orientation API to GtkRuler

	* gtk/gtkruler.[ch]: implement the GtkOrientable interface and
	swallow all code from GtkHRuler and GtkVRuler. Add gtk_ruler_new()
	which takes a GtkOrientation argument.

	* gtk/gtkhruler.c
	* gtk/gtkvruler.c: remove all code except the constructor and
	call gtk_orientable_set_orientation() in init().

	* gtk/gtk.symbols: add gtk_ruler_new().


svn path=/trunk/; revision=21565

1 files changed, 6 insertions, 263 deletions

diff --git a/gtk/gtkvruler.c b/gtk/gtkvruler.c
index 612307a8a8..7dc104b1af 100644
--- a/gtk/gtkvruler.c
+++ b/gtk/gtkvruler.c
@@ -21,291 +21,34 @@
  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  * file for a list of people on the GTK+ Team.  See the ChangeLog
  * files for a list of changes.  These files are distributed with
- * GTK+ at ftp://ftp.gtk.org/pub/gtk/. 
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  */
 
 #include "config.h"
-#include <math.h>
-#include <string.h>
+
+#include "gtkorientable.h"
 #include "gtkvruler.h"
-#include "gtkintl.h"
 #include "gtkalias.h"
 
-#include <glib/gprintf.h>
-
-
-#define RULER_WIDTH           14
-#define MINIMUM_INCR          5
-#define MAXIMUM_SUBDIVIDE     5
-#define MAXIMUM_SCALES        10
-
-#define ROUND(x) ((int) ((x) + 0.5))
-
-
-static gint gtk_vruler_motion_notify (GtkWidget      *widget,
-				      GdkEventMotion *event);
-static void gtk_vruler_draw_ticks    (GtkRuler       *ruler);
-static void gtk_vruler_draw_pos      (GtkRuler       *ruler);
-
 G_DEFINE_TYPE (GtkVRuler, gtk_vruler, GTK_TYPE_RULER)
 
 static void
 gtk_vruler_class_init (GtkVRulerClass *klass)
 {
-  GtkWidgetClass *widget_class;
-  GtkRulerClass *ruler_class;
-
-  widget_class = (GtkWidgetClass*) klass;
-  ruler_class = (GtkRulerClass*) klass;
-
-  widget_class->motion_notify_event = gtk_vruler_motion_notify;
-
-  ruler_class->draw_ticks = gtk_vruler_draw_ticks;
-  ruler_class->draw_pos = gtk_vruler_draw_pos;
 }
 
 static void
 gtk_vruler_init (GtkVRuler *vruler)
 {
-  GtkWidget *widget;
-
-  widget = GTK_WIDGET (vruler);
-  widget->requisition.width = widget->style->xthickness * 2 + RULER_WIDTH;
-  widget->requisition.height = widget->style->ythickness * 2 + 1;
+  gtk_orientable_set_orientation (GTK_ORIENTABLE (vruler),
+                                  GTK_ORIENTATION_VERTICAL);
 }
 
-GtkWidget*
+GtkWidget *
 gtk_vruler_new (void)
 {
   return g_object_new (GTK_TYPE_VRULER, NULL);
 }
 
-
-static gint
-gtk_vruler_motion_notify (GtkWidget      *widget,
-			  GdkEventMotion *event)
-{
-  GtkRuler *ruler;
-  gint y;
-
-  ruler = GTK_RULER (widget);
-
-  gdk_event_request_motions (event);
-  y = event->y;
-
-  ruler->position = ruler->lower + ((ruler->upper - ruler->lower) * y) / widget->allocation.height;
-  g_object_notify (G_OBJECT (ruler), "position");
-
-  /*  Make sure the ruler has been allocated already  */
-  if (ruler->backing_store != NULL)
-    gtk_ruler_draw_pos (ruler);
-
-  return FALSE;
-}
-
-static void
-gtk_vruler_draw_ticks (GtkRuler *ruler)
-{
-  GtkWidget *widget;
-  cairo_t *cr;
-  gint i, j;
-  gint width, height;
-  gint xthickness;
-  gint ythickness;
-  gint length, ideal_length;
-  gdouble lower, upper;		/* Upper and lower limits, in ruler units */
-  gdouble increment;		/* Number of pixels per unit */
-  gint scale;			/* Number of units per major unit */
-  gdouble subd_incr;
-  gdouble start, end, cur;
-  gchar unit_str[32];
-  gint digit_height;
-  gint digit_offset;
-  gint text_height;
-  gint pos;
-  PangoLayout *layout;
-  PangoRectangle logical_rect, ink_rect;
-
-  if (!GTK_WIDGET_DRAWABLE (ruler)) 
-    return;
-
-  widget = GTK_WIDGET (ruler);
-
-  xthickness = widget->style->xthickness;
-  ythickness = widget->style->ythickness;
-
-  layout = gtk_widget_create_pango_layout (widget, "012456789");
-  pango_layout_get_extents (layout, &ink_rect, &logical_rect);
-  
-  digit_height = PANGO_PIXELS (ink_rect.height) + 2;
-  digit_offset = ink_rect.y;
-
-  width = widget->allocation.height;
-  height = widget->allocation.width - ythickness * 2;
-
-  gtk_paint_box (widget->style, ruler->backing_store,
-		 GTK_STATE_NORMAL, GTK_SHADOW_OUT, 
-		 NULL, widget, "vruler",
-		 0, 0, 
-		  widget->allocation.width, widget->allocation.height);
-  
-  cr = gdk_cairo_create (ruler->backing_store);
-  gdk_cairo_set_source_color (cr, &widget->style->fg[widget->state]);
- 
-  cairo_rectangle (cr, 
-		   height + xthickness,
-		   ythickness,
-		   1,
-		   widget->allocation.height - 2 * ythickness);
-
-  upper = ruler->upper / ruler->metric->pixels_per_unit;
-  lower = ruler->lower / ruler->metric->pixels_per_unit;
-
-  if ((upper - lower) == 0)
-    goto out;
-
-  increment = (gdouble) width / (upper - lower);
-
-  /* determine the scale
-   *   use the maximum extents of the ruler to determine the largest
-   *   possible number to be displayed.  Calculate the height in pixels
-   *   of this displayed text. Use this height to find a scale which
-   *   leaves sufficient room for drawing the ruler.  
-   */
-  scale = ceil (ruler->max_size / ruler->metric->pixels_per_unit);
-  g_snprintf (unit_str, sizeof (unit_str), "%d", scale);
-  text_height = strlen (unit_str) * digit_height + 1;
-
-  for (scale = 0; scale < MAXIMUM_SCALES; scale++)
-    if (ruler->metric->ruler_scale[scale] * fabs(increment) > 2 * text_height)
-      break;
-
-  if (scale == MAXIMUM_SCALES)
-    scale = MAXIMUM_SCALES - 1;
-
-  /* drawing starts here */
-  length = 0;
-  for (i = MAXIMUM_SUBDIVIDE - 1; i >= 0; i--)
-    {
-      subd_incr = (gdouble) ruler->metric->ruler_scale[scale] / 
-	          (gdouble) ruler->metric->subdivide[i];
-      if (subd_incr * fabs(increment) <= MINIMUM_INCR) 
-	continue;
-
-      /* Calculate the length of the tickmarks. Make sure that
-       * this length increases for each set of ticks
-       */
-      ideal_length = height / (i + 1) - 1;
-      if (ideal_length > ++length)
-	length = ideal_length;
-
-      if (lower < upper)
-	{
-	  start = floor (lower / subd_incr) * subd_incr;
-	  end   = ceil  (upper / subd_incr) * subd_incr;
-	}
-      else
-	{
-	  start = floor (upper / subd_incr) * subd_incr;
-	  end   = ceil  (lower / subd_incr) * subd_incr;
-	}
-
-      for (cur = start; cur <= end; cur += subd_incr)
-	{
-	  pos = ROUND ((cur - lower) * increment);
-
-	  cairo_rectangle (cr, 
-			   height + xthickness - length, pos,
-			   length,                       1);
-
-	  /* draw label */
-	  if (i == 0)
-	    {
-	      g_snprintf (unit_str, sizeof (unit_str), "%d", (int) cur);
-	      
-	      for (j = 0; j < (int) strlen (unit_str); j++)
-		{
-		  pango_layout_set_text (layout, unit_str + j, 1);
-		  pango_layout_get_extents (layout, NULL, &logical_rect);
-
-      
-                  gtk_paint_layout (widget->style,
-                                    ruler->backing_store,
-                                    GTK_WIDGET_STATE (widget),
-				    FALSE,
-                                    NULL,
-                                    widget,
-                                    "vruler",
-                                    xthickness + 1,
-                                    pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset),
-                                    layout);
-		}
-	    }
-	}
-    }
-
-  cairo_fill (cr);
-out:
-  cairo_destroy (cr);
-
-  g_object_unref (layout);
-}
-
-
-static void
-gtk_vruler_draw_pos (GtkRuler *ruler)
-{
-  GtkWidget *widget = GTK_WIDGET (ruler);
-  gint x, y;
-  gint width, height;
-  gint bs_width, bs_height;
-  gint xthickness;
-  gint ythickness;
-  gdouble increment;
-
-  if (GTK_WIDGET_DRAWABLE (ruler))
-    {
-      xthickness = widget->style->xthickness;
-      ythickness = widget->style->ythickness;
-      width = widget->allocation.width - xthickness * 2;
-      height = widget->allocation.height;
-
-      bs_height = width / 2 + 2;
-      bs_height |= 1;  /* make sure it's odd */
-      bs_width = bs_height / 2 + 1;
-
-      if ((bs_width > 0) && (bs_height > 0))
-	{
-	  cairo_t *cr = gdk_cairo_create (widget->window);
-      
-	  /*  If a backing store exists, restore the ruler  */
-	  if (ruler->backing_store)
-	    gdk_draw_drawable (widget->window,
-			       widget->style->black_gc,
-			       ruler->backing_store,
-			       ruler->xsrc, ruler->ysrc,
-			       ruler->xsrc, ruler->ysrc,
-			       bs_width, bs_height);
-
-	  increment = (gdouble) height / (ruler->upper - ruler->lower);
-
-	  x = (width + bs_width) / 2 + xthickness;
-	  y = ROUND ((ruler->position - ruler->lower) * increment) + (ythickness - bs_height) / 2 - 1;
-	  
-	  gdk_cairo_set_source_color (cr, &widget->style->fg[widget->state]);
-
-	  cairo_move_to (cr, x,            y);
-	  cairo_line_to (cr, x + bs_width, y + bs_height / 2.);
-	  cairo_line_to (cr, x,            y + bs_height);
-	  cairo_fill (cr);
-
-	  cairo_destroy (cr);
-
-	  ruler->xsrc = x;
-	  ruler->ysrc = y;
-	}
-    }
-}
-
 #define __GTK_VRULER_C__
 #include "gtkaliasdef.c"