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Diffstat (limited to 'app/display/gimpcanvascanvasboundary.c')
| -rw-r--r-- | app/display/gimpcanvascanvasboundary.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/app/display/gimpcanvascanvasboundary.c b/app/display/gimpcanvascanvasboundary.c new file mode 100644 index 0000000..01ac5a3 --- /dev/null +++ b/app/display/gimpcanvascanvasboundary.c @@ -0,0 +1,270 @@ +/* GIMP - The GNU Image Manipulation Program + * Copyright (C) 1995 Spencer Kimball and Peter Mattis + * + * gimpcanvascanvasboundary.c + * Copyright (C) 2019 Ell + * + * 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 "core/gimpimage.h" + +#include "gimpcanvas-style.h" +#include "gimpcanvascanvasboundary.h" +#include "gimpdisplayshell.h" + + +enum +{ + PROP_0, + PROP_IMAGE +}; + + +typedef struct _GimpCanvasCanvasBoundaryPrivate GimpCanvasCanvasBoundaryPrivate; + +struct _GimpCanvasCanvasBoundaryPrivate +{ + GimpImage *image; +}; + +#define GET_PRIVATE(canvas_boundary) \ + ((GimpCanvasCanvasBoundaryPrivate *) gimp_canvas_canvas_boundary_get_instance_private ((GimpCanvasCanvasBoundary *) (canvas_boundary))) + + +/* local function prototypes */ + +static void gimp_canvas_canvas_boundary_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gimp_canvas_canvas_boundary_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); +static void gimp_canvas_canvas_boundary_finalize (GObject *object); +static void gimp_canvas_canvas_boundary_draw (GimpCanvasItem *item, + cairo_t *cr); +static cairo_region_t * gimp_canvas_canvas_boundary_get_extents (GimpCanvasItem *item); +static void gimp_canvas_canvas_boundary_stroke (GimpCanvasItem *item, + cairo_t *cr); + + +G_DEFINE_TYPE_WITH_PRIVATE (GimpCanvasCanvasBoundary, gimp_canvas_canvas_boundary, + GIMP_TYPE_CANVAS_RECTANGLE) + +#define parent_class gimp_canvas_canvas_boundary_parent_class + + +static void +gimp_canvas_canvas_boundary_class_init (GimpCanvasCanvasBoundaryClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpCanvasItemClass *item_class = GIMP_CANVAS_ITEM_CLASS (klass); + + object_class->set_property = gimp_canvas_canvas_boundary_set_property; + object_class->get_property = gimp_canvas_canvas_boundary_get_property; + object_class->finalize = gimp_canvas_canvas_boundary_finalize; + + item_class->draw = gimp_canvas_canvas_boundary_draw; + item_class->get_extents = gimp_canvas_canvas_boundary_get_extents; + item_class->stroke = gimp_canvas_canvas_boundary_stroke; + + g_object_class_install_property (object_class, PROP_IMAGE, + g_param_spec_object ("image", NULL, NULL, + GIMP_TYPE_IMAGE, + GIMP_PARAM_READWRITE)); +} + +static void +gimp_canvas_canvas_boundary_init (GimpCanvasCanvasBoundary *canvas_boundary) +{ +} + +static void +gimp_canvas_canvas_boundary_finalize (GObject *object) +{ + GimpCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (object); + + if (private->image) + g_object_remove_weak_pointer (G_OBJECT (private->image), + (gpointer) &private->image); + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +static void +gimp_canvas_canvas_boundary_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_IMAGE: + if (private->image) + g_object_remove_weak_pointer (G_OBJECT (private->image), + (gpointer) &private->image); + private->image = g_value_get_object (value); /* don't ref */ + if (private->image) + g_object_add_weak_pointer (G_OBJECT (private->image), + (gpointer) &private->image); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_canvas_boundary_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (object); + + switch (property_id) + { + case PROP_IMAGE: + g_value_set_object (value, private->image); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_canvas_canvas_boundary_draw (GimpCanvasItem *item, + cairo_t *cr) +{ + GimpCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (item); + + if (private->image) + GIMP_CANVAS_ITEM_CLASS (parent_class)->draw (item, cr); +} + +static cairo_region_t * +gimp_canvas_canvas_boundary_get_extents (GimpCanvasItem *item) +{ + GimpCanvasCanvasBoundaryPrivate *private = GET_PRIVATE (item); + + if (private->image) + return GIMP_CANVAS_ITEM_CLASS (parent_class)->get_extents (item); + + return NULL; +} + +static void +gimp_canvas_canvas_boundary_stroke (GimpCanvasItem *item, + cairo_t *cr) +{ + GimpDisplayShell *shell = gimp_canvas_item_get_shell (item); + + gimp_canvas_set_canvas_style (gimp_canvas_item_get_canvas (item), cr, + shell->offset_x, shell->offset_y); + cairo_stroke (cr); +} + +GimpCanvasItem * +gimp_canvas_canvas_boundary_new (GimpDisplayShell *shell) +{ + g_return_val_if_fail (GIMP_IS_DISPLAY_SHELL (shell), NULL); + + return g_object_new (GIMP_TYPE_CANVAS_CANVAS_BOUNDARY, + "shell", shell, + NULL); +} + +void +gimp_canvas_canvas_boundary_set_image (GimpCanvasCanvasBoundary *boundary, + GimpImage *image) +{ + GimpCanvasCanvasBoundaryPrivate *private; + + g_return_if_fail (GIMP_IS_CANVAS_CANVAS_BOUNDARY (boundary)); + g_return_if_fail (image == NULL || GIMP_IS_IMAGE (image)); + + private = GET_PRIVATE (boundary); + + if (image != private->image) + { + gimp_canvas_item_begin_change (GIMP_CANVAS_ITEM (boundary)); + + if (image) + { + g_object_set (boundary, + "x", (gdouble) 0, + "y", (gdouble) 0, + "width", (gdouble) gimp_image_get_width (image), + "height", (gdouble) gimp_image_get_height (image), + NULL); + } + + g_object_set (boundary, + "image", image, + NULL); + + gimp_canvas_item_end_change (GIMP_CANVAS_ITEM (boundary)); + } + else if (image && image == private->image) + { + gint lx, ly, lw, lh; + gdouble x, y, w ,h; + + lx = 0; + ly = 0; + lw = gimp_image_get_width (image); + lh = gimp_image_get_height (image); + + g_object_get (boundary, + "x", &x, + "y", &y, + "width", &w, + "height", &h, + NULL); + + if (lx != (gint) x || + ly != (gint) y || + lw != (gint) w || + lh != (gint) h) + { + gimp_canvas_item_begin_change (GIMP_CANVAS_ITEM (boundary)); + + g_object_set (boundary, + "x", (gdouble) lx, + "y", (gdouble) ly, + "width", (gdouble) lw, + "height", (gdouble) lh, + NULL); + + gimp_canvas_item_end_change (GIMP_CANVAS_ITEM (boundary)); + } + } +} |