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/*
* $Id: layer.h 23053 2021-01-12 12:20:36Z yeti-dn $
* Copyright (C) 2016 David Necas (Yeti).
* E-mail: yeti@gwyddion.net.
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GWY_LAYER_H__
#define __GWY_LAYER_H__ 1
enum {
PROXIMITY_DISTANCE = 8,
CROSS_SIZE = 8,
};
G_GNUC_UNUSED
static inline void
gwy_vector_layer_transform_line_to_target(GwyVectorLayer *layer,
GdkDrawable *drawable,
GwyRenderingTarget target,
gdouble xfrom, gdouble yfrom,
gdouble xto, gdouble yto,
gint *xifrom, gint *yifrom,
gint *xito, gint *yito)
{
GwyDataView *data_view;
gdouble xreal, yreal;
gint width, height;
gdk_drawable_get_size(drawable, &width, &height);
data_view = GWY_DATA_VIEW(GWY_DATA_VIEW_LAYER(layer)->parent);
g_return_if_fail(data_view);
gwy_data_view_get_real_data_sizes(data_view, &xreal, &yreal);
if (target == GWY_RENDERING_TARGET_PIXMAP_IMAGE) {
*xifrom = floor((xfrom)*width/xreal);
*yifrom = floor((yfrom)*height/yreal);
*xito = floor((xto)*width/xreal);
*yito = floor((yto)*height/yreal);
return;
}
g_return_if_fail(target == GWY_RENDERING_TARGET_SCREEN);
gwy_data_view_coords_real_to_xy(data_view, xfrom, yfrom, xifrom, yifrom);
gwy_data_view_coords_real_to_xy(data_view, xto, yto, xito, yito);
gwy_data_view_coords_xy_cut_line(data_view, xifrom, yifrom, xito, yito);
}
/* GwySelection has no public interface for direct access to coordinates, even
* for reading, but layers are friends. Wrap the ugliness in a function... */
G_GNUC_UNUSED
static inline const gdouble*
gwy_vector_layer_selection_data(GwyVectorLayer *layer)
{
return &g_array_index(layer->selection->objects, gdouble, 0);
}
G_GNUC_UNUSED
static inline guint
gwy_vector_layer_n_selected(GwyVectorLayer *layer)
{
return gwy_selection_get_data(layer->selection, NULL);
}
#endif
/* vim: set cin et ts=4 sw=4 cino=>1s,e0,n0,f0,{0,}0,^0,\:1s,=0,g1s,h0,t0,+1s,c3,(0,u0 : */
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