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-rw-r--r--app/display/gimpcanvassamplepoint.c356
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diff --git a/app/display/gimpcanvassamplepoint.c b/app/display/gimpcanvassamplepoint.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimpcanvassamplepoint.c
+ * Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+
+#include "libgimpbase/gimpbase.h"
+#include "libgimpmath/gimpmath.h"
+
+#include "display-types.h"
+
+#include "gimpcanvas.h"
+#include "gimpcanvas-style.h"
+#include "gimpcanvassamplepoint.h"
+#include "gimpdisplayshell.h"
+
+
+#define GIMP_SAMPLE_POINT_DRAW_SIZE 14
+
+
+enum
+{
+ PROP_0,
+ PROP_X,
+ PROP_Y,
+ PROP_INDEX,
+ PROP_SAMPLE_POINT_STYLE
+};
+
+
+typedef struct _GimpCanvasSamplePointPrivate GimpCanvasSamplePointPrivate;
+
+struct _GimpCanvasSamplePointPrivate
+{
+ gint x;
+ gint y;
+ gint index;
+ gboolean sample_point_style;
+};
+
+#define GET_PRIVATE(sample_point) \
+ ((GimpCanvasSamplePointPrivate *) gimp_canvas_sample_point_get_instance_private ((GimpCanvasSamplePoint *) (sample_point)))
+
+
+/* local function prototypes */
+
+static void gimp_canvas_sample_point_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_sample_point_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gimp_canvas_sample_point_draw (GimpCanvasItem *item,
+ cairo_t *cr);
+static cairo_region_t * gimp_canvas_sample_point_get_extents (GimpCanvasItem *item);
+static void gimp_canvas_sample_point_stroke (GimpCanvasItem *item,
+ cairo_t *cr);
+static void gimp_canvas_sample_point_fill (GimpCanvasItem *item,
+ cairo_t *cr);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasSamplePoint, gimp_canvas_sample_point,
+ GIMP_TYPE_CANVAS_ITEM)
+
+#define parent_class gimp_canvas_sample_point_parent_class
+
+
+static void
+gimp_canvas_sample_point_class_init (GimpCanvasSamplePointClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
+
+ object_class->set_property = gimp_canvas_sample_point_set_property;
+ object_class->get_property = gimp_canvas_sample_point_get_property;
+
+ item_class->draw = gimp_canvas_sample_point_draw;
+ item_class->get_extents = gimp_canvas_sample_point_get_extents;
+ item_class->stroke = gimp_canvas_sample_point_stroke;
+ item_class->fill = gimp_canvas_sample_point_fill;
+
+ g_object_class_install_property (object_class, PROP_X,
+ g_param_spec_int ("x", NULL, NULL,
+ -GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE, 0,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_Y,
+ g_param_spec_int ("y", NULL, NULL,
+ -GIMP_MAX_IMAGE_SIZE,
+ GIMP_MAX_IMAGE_SIZE, 0,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_INDEX,
+ g_param_spec_int ("index", NULL, NULL,
+ 0, G_MAXINT, 0,
+ GIMP_PARAM_READWRITE));
+
+ g_object_class_install_property (object_class, PROP_SAMPLE_POINT_STYLE,
+ g_param_spec_boolean ("sample-point-style",
+ NULL, NULL,
+ FALSE,
+ GIMP_PARAM_READWRITE));
+}
+
+static void
+gimp_canvas_sample_point_init (GimpCanvasSamplePoint *sample_point)
+{
+}
+
+static void
+gimp_canvas_sample_point_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasSamplePointPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_X:
+ private->x = g_value_get_int (value);
+ break;
+ case PROP_Y:
+ private->y = g_value_get_int (value);
+ break;
+ case PROP_INDEX:
+ private->index = g_value_get_int (value);
+ break;
+ case PROP_SAMPLE_POINT_STYLE:
+ private->sample_point_style = g_value_get_boolean (value);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_sample_point_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpCanvasSamplePointPrivate *private = GET_PRIVATE (object);
+
+ switch (property_id)
+ {
+ case PROP_X:
+ g_value_set_int (value, private->x);
+ break;
+ case PROP_Y:
+ g_value_set_int (value, private->x);
+ break;
+ case PROP_INDEX:
+ g_value_set_int (value, private->x);
+ break;
+ case PROP_SAMPLE_POINT_STYLE:
+ g_value_set_boolean (value, private->sample_point_style);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_canvas_sample_point_transform (GimpCanvasItem *item,
+ gdouble *x,
+ gdouble *y)
+{
+ GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item);
+
+ gimp_canvas_item_transform_xy_f (item,
+ private->x + 0.5,
+ private->y + 0.5,
+ x, y);
+
+ *x = floor (*x) + 0.5;
+ *y = floor (*y) + 0.5;
+}
+
+#define HALF_SIZE (GIMP_SAMPLE_POINT_DRAW_SIZE / 2)
+
+static void
+gimp_canvas_sample_point_draw (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item);
+ GtkWidget *canvas = gimp_canvas_item_get_canvas (item);
+ PangoLayout *layout;
+ gdouble x, y;
+ gint x1, x2, y1, y2;
+
+ gimp_canvas_sample_point_transform (item, &x, &y);
+
+ x1 = x - GIMP_SAMPLE_POINT_DRAW_SIZE;
+ x2 = x + GIMP_SAMPLE_POINT_DRAW_SIZE;
+ y1 = y - GIMP_SAMPLE_POINT_DRAW_SIZE;
+ y2 = y + GIMP_SAMPLE_POINT_DRAW_SIZE;
+
+ cairo_move_to (cr, x, y1);
+ cairo_line_to (cr, x, y1 + HALF_SIZE);
+
+ cairo_move_to (cr, x, y2);
+ cairo_line_to (cr, x, y2 - HALF_SIZE);
+
+ cairo_move_to (cr, x1, y);
+ cairo_line_to (cr, x1 + HALF_SIZE, y);
+
+ cairo_move_to (cr, x2, y);
+ cairo_line_to (cr, x2 - HALF_SIZE, y);
+
+ cairo_arc_negative (cr, x, y, HALF_SIZE, 0.0, 0.5 * G_PI);
+
+ _gimp_canvas_item_stroke (item, cr);
+
+ layout = gimp_canvas_get_layout (GIMP_CANVAS (canvas),
+ "%d", private->index);
+
+ cairo_move_to (cr, x + 3, y + 3);
+ pango_cairo_show_layout (cr, layout);
+
+ _gimp_canvas_item_stroke (item, cr);
+}
+
+static cairo_region_t *
+gimp_canvas_sample_point_get_extents (GimpCanvasItem *item)
+{
+ GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item);
+ GtkWidget *canvas = gimp_canvas_item_get_canvas (item);
+ cairo_rectangle_int_t rectangle;
+ PangoLayout *layout;
+ PangoRectangle ink;
+ gdouble x, y;
+ gint x1, x2, y1, y2;
+
+ gimp_canvas_sample_point_transform (item, &x, &y);
+
+ x1 = floor (x - GIMP_SAMPLE_POINT_DRAW_SIZE);
+ x2 = ceil (x + GIMP_SAMPLE_POINT_DRAW_SIZE);
+ y1 = floor (y - GIMP_SAMPLE_POINT_DRAW_SIZE);
+ y2 = ceil (y + GIMP_SAMPLE_POINT_DRAW_SIZE);
+
+ layout = gimp_canvas_get_layout (GIMP_CANVAS (canvas),
+ "%d", private->index);
+
+ pango_layout_get_extents (layout, &ink, NULL);
+
+ x2 = MAX (x2, 3 + ink.width);
+ y2 = MAX (y2, 3 + ink.height);
+
+ rectangle.x = x1 - 1.5;
+ rectangle.y = y1 - 1.5;
+ rectangle.width = x2 - x1 + 3.0;
+ rectangle.height = y2 - y1 + 3.0;
+
+ return cairo_region_create_rectangle (&rectangle);
+}
+
+static void
+gimp_canvas_sample_point_stroke (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item);
+
+ if (private->sample_point_style)
+ {
+ gimp_canvas_set_tool_bg_style (gimp_canvas_item_get_canvas (item), cr);
+ cairo_stroke_preserve (cr);
+
+ gimp_canvas_set_sample_point_style (gimp_canvas_item_get_canvas (item), cr,
+ gimp_canvas_item_get_highlight (item));
+ cairo_stroke (cr);
+ }
+ else
+ {
+ GIMP_CANVAS_ITEM_CLASS (parent_class)->stroke (item, cr);
+ }
+}
+
+static void
+gimp_canvas_sample_point_fill (GimpCanvasItem *item,
+ cairo_t *cr)
+{
+ GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item);
+
+ if (private->sample_point_style)
+ {
+ gimp_canvas_set_sample_point_style (gimp_canvas_item_get_canvas (item), cr,
+ gimp_canvas_item_get_highlight (item));
+ cairo_fill (cr);
+ }
+ else
+ {
+ GIMP_CANVAS_ITEM_CLASS (parent_class)->fill (item, cr);
+ }
+}
+
+GimpCanvasItem *
+gimp_canvas_sample_point_new (GimpDisplayShell *shell,
+ gint x,
+ gint y,
+ gint index,
+ gboolean sample_point_style)
+{
+ g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL);
+
+ return g_object_new (GIMP_TYPE_CANVAS_SAMPLE_POINT,
+ "shell", shell,
+ "x", x,
+ "y", y,
+ "index", index,
+ "sample-point-style", sample_point_style,
+ NULL);
+}
+
+void
+gimp_canvas_sample_point_set (GimpCanvasItem *sample_point,
+ gint x,
+ gint y)
+{
+ g_return_if_fail (GIMP_IS_CANVAS_SAMPLE_POINT (sample_point));
+
+ gimp_canvas_item_begin_change (sample_point);
+
+ g_object_set (sample_point,
+ "x", x,
+ "y", y,
+ NULL);
+
+ gimp_canvas_item_end_change (sample_point);
+}
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