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094397ad94
2008-05-29 Sven Neumann <sven@gimp.org> * themes/Default/images/Makefile.am (STOCK_TOOL_IMAGES): * themes/Default/images/tools/stock-tool-polygon-select-16.png * themes/Default/images/tools/stock-tool-polygon-select-22.png: removed unused tool icon. * libgimpwidgets/gimpstock.[ch]: don't register GIMP_STOCK_TOOL_POLYGON_SELECT. * libgimpwidgets/gimphruler.c * libgimpwidgets/gimpvruler.c: added missing API docs. svn path=/trunk/; revision=25855
352 lines
10 KiB
C
352 lines
10 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <string.h>
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#include <gtk/gtk.h>
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#include "libgimpmath/gimpmath.h"
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#include "gimpwidgetstypes.h"
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#include "gimpvruler.h"
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#define RULER_WIDTH 13
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#define MINIMUM_INCR 5
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static const struct
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{
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gdouble ruler_scale[16];
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gint subdivide[5];
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} ruler_metric =
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{
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{ 1, 2, 5, 10, 25, 50, 100, 250, 500, 1000, 2500, 5000, 10000, 25000, 50000, 100000 },
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{ 1, 5, 10, 50, 100 }
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};
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typedef struct
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{
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gint xsrc;
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gint ysrc;
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} GimpVRulerPrivate;
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static gint gimp_vruler_motion_notify (GtkWidget *widget,
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GdkEventMotion *event);
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static void gimp_vruler_draw_ticks (GimpRuler *ruler);
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static void gimp_vruler_draw_pos (GimpRuler *ruler);
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G_DEFINE_TYPE (GimpVRuler, gimp_vruler, GIMP_TYPE_RULER)
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#define GIMP_VRULER_GET_PRIVATE(ruler) \
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G_TYPE_INSTANCE_GET_PRIVATE (ruler, GIMP_TYPE_VRULER, GimpVRulerPrivate)
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static void
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gimp_vruler_class_init (GimpVRulerClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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GimpRulerClass *ruler_class = GIMP_RULER_CLASS (klass);
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widget_class->motion_notify_event = gimp_vruler_motion_notify;
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ruler_class->draw_ticks = gimp_vruler_draw_ticks;
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ruler_class->draw_pos = gimp_vruler_draw_pos;
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g_type_class_add_private (object_class, sizeof (GimpVRulerPrivate));
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}
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static void
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gimp_vruler_init (GimpVRuler *vruler)
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{
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GtkWidget *widget = GTK_WIDGET (vruler);
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widget->requisition.width = widget->style->xthickness * 2 + RULER_WIDTH;
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widget->requisition.height = widget->style->ythickness * 2 + 1;
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}
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/**
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* gimp_vruler_new:
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*
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* Creates a new vertical ruler.
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*
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* Return value: a new #GimpVRuler widget.
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*
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* Since: GIMP 2.8
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**/
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GtkWidget*
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gimp_vruler_new (void)
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{
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return g_object_new (GIMP_TYPE_VRULER, NULL);
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}
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static gint
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gimp_vruler_motion_notify (GtkWidget *widget,
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GdkEventMotion *event)
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{
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GimpRuler *ruler = GIMP_RULER (widget);
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gdouble lower;
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gdouble upper;
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gint y;
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gdk_event_request_motions (event);
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y = event->y;
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gimp_ruler_get_range (ruler, &lower, &upper, NULL);
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gimp_ruler_set_position (ruler,
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lower +
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((upper - lower) * y) / widget->allocation.height);
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return FALSE;
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}
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static void
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gimp_vruler_draw_ticks (GimpRuler *ruler)
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{
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GtkWidget *widget = GTK_WIDGET (ruler);
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GdkDrawable *backing_store;
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cairo_t *cr;
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gint i, j;
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gint width, height;
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gint xthickness;
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gint ythickness;
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gint length, ideal_length;
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gdouble lower, upper; /* Upper and lower limits, in ruler units */
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gdouble increment; /* Number of pixels per unit */
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gint scale; /* Number of units per major unit */
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gdouble start, end, cur;
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gchar unit_str[32];
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gint digit_height;
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gint digit_offset;
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gint text_height;
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gint pos;
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gdouble max_size;
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GimpUnit unit;
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PangoLayout *layout;
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PangoRectangle logical_rect, ink_rect;
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if (! GTK_WIDGET_DRAWABLE (widget))
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return;
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backing_store = _gimp_ruler_get_backing_store (ruler);
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xthickness = widget->style->xthickness;
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ythickness = widget->style->ythickness;
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layout = _gimp_ruler_create_pango_layout (widget, "012456789");
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pango_layout_get_extents (layout, &ink_rect, &logical_rect);
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digit_height = PANGO_PIXELS (ink_rect.height) + 2;
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digit_offset = ink_rect.y;
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width = widget->allocation.height;
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height = widget->allocation.width - ythickness * 2;
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gtk_paint_box (widget->style, backing_store,
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GTK_STATE_NORMAL, GTK_SHADOW_OUT,
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NULL, widget, "vruler",
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0, 0,
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widget->allocation.width, widget->allocation.height);
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cr = gdk_cairo_create (backing_store);
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gdk_cairo_set_source_color (cr, &widget->style->fg[widget->state]);
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cairo_rectangle (cr,
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height + xthickness,
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ythickness,
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1,
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widget->allocation.height - 2 * ythickness);
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gimp_ruler_get_range (ruler, &lower, &upper, &max_size);
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if ((upper - lower) == 0)
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goto out;
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increment = (gdouble) width / (upper - lower);
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/* determine the scale
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* use the maximum extents of the ruler to determine the largest
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* possible number to be displayed. Calculate the height in pixels
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* of this displayed text. Use this height to find a scale which
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* leaves sufficient room for drawing the ruler.
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*/
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scale = ceil (max_size);
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g_snprintf (unit_str, sizeof (unit_str), "%d", scale);
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text_height = strlen (unit_str) * digit_height + 1;
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for (scale = 0; scale < G_N_ELEMENTS (ruler_metric.ruler_scale); scale++)
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if (ruler_metric.ruler_scale[scale] * fabs (increment) > 2 * text_height)
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break;
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if (scale == G_N_ELEMENTS (ruler_metric.ruler_scale))
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scale = G_N_ELEMENTS (ruler_metric.ruler_scale) - 1;
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unit = gimp_ruler_get_unit (ruler);
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/* drawing starts here */
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length = 0;
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for (i = G_N_ELEMENTS (ruler_metric.subdivide) - 1; i >= 0; i--)
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{
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gdouble subd_incr;
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/* hack to get proper subdivisions at full pixels */
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if (unit == GIMP_UNIT_PIXEL && scale == 1 && i == 1)
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subd_incr = 1.0;
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else
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subd_incr = ((gdouble) ruler_metric.ruler_scale[scale] /
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(gdouble) ruler_metric.subdivide[i]);
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if (subd_incr * fabs (increment) <= MINIMUM_INCR)
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continue;
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/* don't subdivide pixels */
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if (unit == GIMP_UNIT_PIXEL && subd_incr < 1)
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continue;
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/* Calculate the length of the tickmarks. Make sure that
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* this length increases for each set of ticks
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*/
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ideal_length = height / (i + 1) - 1;
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if (ideal_length > ++length)
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length = ideal_length;
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if (lower < upper)
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{
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start = floor (lower / subd_incr) * subd_incr;
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end = ceil (upper / subd_incr) * subd_incr;
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}
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else
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{
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start = floor (upper / subd_incr) * subd_incr;
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end = ceil (lower / subd_incr) * subd_incr;
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}
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for (cur = start; cur <= end; cur += subd_incr)
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{
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pos = ROUND ((cur - lower) * increment);
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cairo_rectangle (cr,
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height + xthickness - length, pos,
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length, 1);
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/* draw label */
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if (i == 0)
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{
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g_snprintf (unit_str, sizeof (unit_str), "%d", (int) cur);
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for (j = 0; j < (int) strlen (unit_str); j++)
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{
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pango_layout_set_text (layout, unit_str + j, 1);
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pango_layout_get_extents (layout, NULL, &logical_rect);
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gtk_paint_layout (widget->style,
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backing_store,
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GTK_WIDGET_STATE (widget),
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FALSE,
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NULL,
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widget,
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"vruler",
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xthickness + 1,
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pos + digit_height * j + 2 + PANGO_PIXELS (logical_rect.y - digit_offset),
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layout);
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}
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}
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}
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}
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cairo_fill (cr);
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out:
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cairo_destroy (cr);
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g_object_unref (layout);
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}
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static void
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gimp_vruler_draw_pos (GimpRuler *ruler)
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{
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GtkWidget *widget = GTK_WIDGET (ruler);
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if (GTK_WIDGET_DRAWABLE (ruler))
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{
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GimpVRulerPrivate *priv = GIMP_VRULER_GET_PRIVATE (ruler);
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gint x, y;
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gint width, height;
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gint bs_width, bs_height;
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gint xthickness;
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gint ythickness;
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xthickness = widget->style->xthickness;
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ythickness = widget->style->ythickness;
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width = widget->allocation.width - xthickness * 2;
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height = widget->allocation.height;
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bs_height = width / 2 + 2;
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bs_height |= 1; /* make sure it's odd */
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bs_width = bs_height / 2 + 1;
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if ((bs_width > 0) && (bs_height > 0))
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{
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GdkDrawable *backing_store = _gimp_ruler_get_backing_store (ruler);
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cairo_t *cr = gdk_cairo_create (widget->window);
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gdouble lower;
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gdouble upper;
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gdouble position;
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gdouble increment;
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/* If a backing store exists, restore the ruler */
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if (backing_store)
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gdk_draw_drawable (widget->window,
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widget->style->black_gc,
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backing_store,
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priv->xsrc, priv->ysrc,
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priv->xsrc, priv->ysrc,
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bs_width, bs_height);
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position = gimp_ruler_get_position (ruler);
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gimp_ruler_get_range (ruler, &lower, &upper, NULL);
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increment = (gdouble) height / (upper - lower);
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x = (width + bs_width) / 2 + xthickness;
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y = ROUND ((position - lower) * increment) + (ythickness - bs_height) / 2 - 1;
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gdk_cairo_set_source_color (cr, &widget->style->fg[widget->state]);
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cairo_move_to (cr, x, y);
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cairo_line_to (cr, x + bs_width, y + bs_height / 2.);
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cairo_line_to (cr, x, y + bs_height);
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cairo_fill (cr);
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cairo_destroy (cr);
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priv->xsrc = x;
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priv->ysrc = y;
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}
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}
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}
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