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app: add a guide line canvas item class
This commit is contained in:
Michael Natterer
parent
612aee9f33
commit
8dbab53fae
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@ -19,6 +19,8 @@ libappdisplay_a_sources = \
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display-types.h \
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display-types.h \
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gimpcanvas.c \
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gimpcanvas.c \
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gimpcanvas.h \
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gimpcanvas.h \
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gimpcanvasguide.c \
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gimpcanvasguide.h \
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gimpcanvashandle.c \
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gimpcanvashandle.c \
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gimpcanvashandle.h \
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gimpcanvashandle.h \
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gimpcanvasitem.c \
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gimpcanvasitem.c \
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236
app/display/gimpcanvasguide.c
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236
app/display/gimpcanvasguide.c
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@ -0,0 +1,236 @@
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/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpcanvasguide.c
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* Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libgimpbase/gimpbase.h"
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#include "libgimpmath/gimpmath.h"
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#include "display-types.h"
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#include "gimpcanvasguide.h"
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#include "gimpdisplayshell.h"
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#include "gimpdisplayshell-transform.h"
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enum
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{
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PROP_0,
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PROP_ORIENTATION,
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PROP_POSITION
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};
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typedef struct _GimpCanvasGuidePrivate GimpCanvasGuidePrivate;
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struct _GimpCanvasGuidePrivate
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{
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GimpOrientationType orientation;
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gint position;
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};
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#define GET_PRIVATE(guide) \
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G_TYPE_INSTANCE_GET_PRIVATE (guide, \
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GIMP_TYPE_CANVAS_GUIDE, \
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GimpCanvasGuidePrivate)
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/* local function prototypes */
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static void gimp_canvas_guide_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gimp_canvas_guide_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void gimp_canvas_guide_draw (GimpCanvasItem *item,
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GimpDisplayShell *shell,
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cairo_t *cr);
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static GdkRegion * gimp_canvas_guide_get_extents (GimpCanvasItem *item,
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GimpDisplayShell *shell);
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G_DEFINE_TYPE (GimpCanvasGuide, gimp_canvas_guide, GIMP_TYPE_CANVAS_ITEM)
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#define parent_class gimp_canvas_guide_parent_class
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static void
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gimp_canvas_guide_class_init (GimpCanvasGuideClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass);
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object_class->set_property = gimp_canvas_guide_set_property;
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object_class->get_property = gimp_canvas_guide_get_property;
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item_class->draw = gimp_canvas_guide_draw;
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item_class->get_extents = gimp_canvas_guide_get_extents;
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g_object_class_install_property (object_class, PROP_ORIENTATION,
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g_param_spec_enum ("orientation", NULL, NULL,
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GIMP_TYPE_ORIENTATION_TYPE,
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GIMP_ORIENTATION_HORIZONTAL,
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GIMP_PARAM_READWRITE));
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g_object_class_install_property (object_class, PROP_POSITION,
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g_param_spec_int ("position", NULL, NULL,
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-GIMP_MAX_IMAGE_SIZE,
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GIMP_MAX_IMAGE_SIZE, 0,
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GIMP_PARAM_READWRITE));
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g_type_class_add_private (klass, sizeof (GimpCanvasGuidePrivate));
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}
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static void
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gimp_canvas_guide_init (GimpCanvasGuide *guide)
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{
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}
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static void
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gimp_canvas_guide_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GimpCanvasGuidePrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_ORIENTATION:
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private->orientation = g_value_get_enum (value);
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break;
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case PROP_POSITION:
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private->position = g_value_get_int (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_canvas_guide_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GimpCanvasGuidePrivate *private = GET_PRIVATE (object);
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switch (property_id)
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{
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case PROP_ORIENTATION:
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g_value_set_enum (value, private->orientation);
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break;
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case PROP_POSITION:
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g_value_set_int (value, private->position);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_canvas_guide_transform (GimpCanvasItem *item,
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GimpDisplayShell *shell,
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gdouble *x1,
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gdouble *y1,
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gdouble *x2,
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gdouble *y2)
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{
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GimpCanvasGuidePrivate *private = GET_PRIVATE (item);
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GtkAllocation allocation;
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gint x, y;
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gtk_widget_get_allocation (shell->canvas, &allocation);
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*x1 = 0;
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*y1 = 0;
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*x2 = allocation.width;
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*y2 = allocation.height;
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switch (private->orientation)
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{
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case GIMP_ORIENTATION_HORIZONTAL:
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gimp_display_shell_transform_xy (shell, 0, private->position, &x, &y);
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*y1 = *y2 = y + 0.5;
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break;
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case GIMP_ORIENTATION_VERTICAL:
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gimp_display_shell_transform_xy (shell, private->position, 0, &x, &y);
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*x1 = *x2 = x + 0.5;
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break;
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case GIMP_ORIENTATION_UNKNOWN:
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return;
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}
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}
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static void
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gimp_canvas_guide_draw (GimpCanvasItem *item,
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GimpDisplayShell *shell,
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cairo_t *cr)
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{
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gdouble x1, y1;
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gdouble x2, y2;
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gimp_canvas_guide_transform (item, shell, &x1, &y1, &x2, &y2);
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cairo_move_to (cr, x1, y1);
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cairo_line_to (cr, x2, y2);
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_gimp_canvas_item_stroke (item, shell, cr);
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}
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static GdkRegion *
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gimp_canvas_guide_get_extents (GimpCanvasItem *item,
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GimpDisplayShell *shell)
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{
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GdkRectangle rectangle;
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gdouble x1, y1;
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gdouble x2, y2;
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gimp_canvas_guide_transform (item, shell, &x1, &y1, &x2, &y2);
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rectangle.x = MIN (x1, x2) - 1.5;
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rectangle.y = MIN (y1, y2) - 1.5;
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rectangle.width = ABS (x2 - x1) + 3.0;
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rectangle.height = ABS (y2 - y1) + 3.0;
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return gdk_region_rectangle (&rectangle);
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}
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GimpCanvasItem *
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gimp_canvas_guide_new (GimpOrientationType orientation,
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gint position)
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{
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return g_object_new (GIMP_TYPE_CANVAS_GUIDE,
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"orientation", orientation,
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"position", position,
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NULL);
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}
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56
app/display/gimpcanvasguide.h
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56
app/display/gimpcanvasguide.h
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@ -0,0 +1,56 @@
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/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimpcanvasguide.h
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* Copyright (C) 2010 Michael Natterer <mitch@gimp.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __GIMP_CANVAS_GUIDE_H__
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#define __GIMP_CANVAS_GUIDE_H__
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#include "gimpcanvasitem.h"
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#define GIMP_TYPE_CANVAS_GUIDE (gimp_canvas_guide_get_type ())
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#define GIMP_CANVAS_GUIDE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_CANVAS_GUIDE, GimpCanvasGuide))
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#define GIMP_CANVAS_GUIDE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_CANVAS_GUIDE, GimpCanvasGuideClass))
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#define GIMP_IS_CANVAS_GUIDE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_CANVAS_GUIDE))
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#define GIMP_IS_CANVAS_GUIDE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_CANVAS_GUIDE))
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#define GIMP_CANVAS_GUIDE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_CANVAS_GUIDE, GimpCanvasGuideClass))
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typedef struct _GimpCanvasGuide GimpCanvasGuide;
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typedef struct _GimpCanvasGuideClass GimpCanvasGuideClass;
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struct _GimpCanvasGuide
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{
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GimpCanvasItem parent_instance;
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};
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struct _GimpCanvasGuideClass
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{
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GimpCanvasItemClass parent_class;
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};
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GType gimp_canvas_guide_get_type (void) G_GNUC_CONST;
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GimpCanvasItem * gimp_canvas_guide_new (GimpOrientationType orientation,
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gint position);
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#endif /* __GIMP_CANVAS_GUIDE_H__ */
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