/* GIMP - The GNU Image Manipulation Program * Copyright (C) 1995 Spencer Kimball and Peter Mattis * * gimpcanvassamplepoint.c * Copyright (C) 2010 Michael Natterer * * 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 . */ #include "config.h" #include #include #include "libgimpbase/gimpbase.h" #include "libgimpmath/gimpmath.h" #include "display-types.h" #include "gimpcanvas.h" #include "gimpcanvassamplepoint.h" #include "gimpdisplayshell.h" #include "gimpdisplayshell-style.h" #include "gimpdisplayshell-transform.h" #define GIMP_SAMPLE_POINT_DRAW_SIZE 10 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) \ G_TYPE_INSTANCE_GET_PRIVATE (sample_point, \ GIMP_TYPE_CANVAS_SAMPLE_POINT, \ GimpCanvasSamplePointPrivate) /* 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, GimpDisplayShell *shell, cairo_t *cr); static cairo_region_t * gimp_canvas_sample_point_get_extents (GimpCanvasItem *item, GimpDisplayShell *shell); static void gimp_canvas_sample_point_stroke (GimpCanvasItem *item, GimpDisplayShell *shell, cairo_t *cr); static void gimp_canvas_sample_point_fill (GimpCanvasItem *item, GimpDisplayShell *shell, cairo_t *cr); G_DEFINE_TYPE (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)); g_type_class_add_private (klass, sizeof (GimpCanvasSamplePointPrivate)); } 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, GimpDisplayShell *shell, gdouble *x, gdouble *y) { GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item); gimp_display_shell_transform_xy_f (shell, 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, GimpDisplayShell *shell, cairo_t *cr) { GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item); PangoLayout *layout; gdouble x, y; gint x1, x2, y1, y2; gimp_canvas_sample_point_transform (item, shell, &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 (shell->canvas), "%d", private->index); cairo_move_to (cr, x + 2.5, y + 2.5); pango_cairo_show_layout (cr, layout); _gimp_canvas_item_fill (item, cr); } static cairo_region_t * gimp_canvas_sample_point_get_extents (GimpCanvasItem *item, GimpDisplayShell *shell) { cairo_rectangle_int_t rectangle; gdouble x, y; gint x1, x2, y1, y2; gimp_canvas_sample_point_transform (item, shell, &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); rectangle.x = x1 - 1.5; rectangle.y = y1 - 1.5; rectangle.width = x2 - x1 + 3.0; rectangle.height = y2 - y1 + 3.0; /* HACK: add 5 so the number gets cleared too */ rectangle.width += 5; rectangle.height += 5; return cairo_region_create_rectangle (&rectangle); } static void gimp_canvas_sample_point_stroke (GimpCanvasItem *item, GimpDisplayShell *shell, cairo_t *cr) { GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item); if (private->sample_point_style) { gimp_display_shell_set_sample_point_style (shell, cr, gimp_canvas_item_get_highlight (item)); cairo_stroke (cr); } else { GIMP_CANVAS_ITEM_CLASS (parent_class)->stroke (item, shell, cr); } } static void gimp_canvas_sample_point_fill (GimpCanvasItem *item, GimpDisplayShell *shell, cairo_t *cr) { GimpCanvasSamplePointPrivate *private = GET_PRIVATE (item); if (private->sample_point_style) { gimp_display_shell_set_sample_point_style (shell, cr, gimp_canvas_item_get_highlight (item)); cairo_fill (cr); } else { GIMP_CANVAS_ITEM_CLASS (parent_class)->fill (item, shell, 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); }