337 lines
10 KiB
C
337 lines
10 KiB
C
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/* PIKA - Photo and Image Kooker Application
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* a rebranding of The GNU Image Manipulation Program (created with heckimp)
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* A derived work which may be trivial. However, any changes may be (C)2023 by Aldercone Studio
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*
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* Original copyright, applying to most contents (license remains unchanged):
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* pikafgbgview.c
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* Copyright (C) 2005 Sven Neumann <sven@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 <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <string.h>
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#include <gegl.h>
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#include <gtk/gtk.h>
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#include "libpikabase/pikabase.h"
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#include "libpikacolor/pikacolor.h"
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#include "libpikawidgets/pikawidgets.h"
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#include "widgets-types.h"
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#include "config/pikacoreconfig.h"
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#include "core/pika.h"
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#include "core/pikacontext.h"
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#include "pikadnd.h"
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#include "pikafgbgview.h"
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enum
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{
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PROP_0,
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PROP_CONTEXT
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};
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static void pika_fg_bg_view_dispose (GObject *object);
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static void pika_fg_bg_view_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 pika_fg_bg_view_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 gboolean pika_fg_bg_view_draw (GtkWidget *widget,
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cairo_t *cr);
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static void pika_fg_bg_view_create_transform (PikaFgBgView *view);
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static void pika_fg_bg_view_destroy_transform (PikaFgBgView *view);
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G_DEFINE_TYPE (PikaFgBgView, pika_fg_bg_view, GTK_TYPE_WIDGET)
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#define parent_class pika_fg_bg_view_parent_class
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static void
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pika_fg_bg_view_class_init (PikaFgBgViewClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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object_class->dispose = pika_fg_bg_view_dispose;
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object_class->set_property = pika_fg_bg_view_set_property;
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object_class->get_property = pika_fg_bg_view_get_property;
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widget_class->draw = pika_fg_bg_view_draw;
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g_object_class_install_property (object_class, PROP_CONTEXT,
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g_param_spec_object ("context",
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NULL, NULL,
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PIKA_TYPE_CONTEXT,
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PIKA_PARAM_READWRITE));
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gtk_widget_class_set_css_name (widget_class, "PikaFgBgView");
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}
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static void
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pika_fg_bg_view_init (PikaFgBgView *view)
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{
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gtk_widget_set_has_window (GTK_WIDGET (view), FALSE);
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pika_widget_track_monitor (GTK_WIDGET (view),
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G_CALLBACK (pika_fg_bg_view_destroy_transform),
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NULL, NULL);
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}
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static void
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pika_fg_bg_view_dispose (GObject *object)
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{
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PikaFgBgView *view = PIKA_FG_BG_VIEW (object);
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if (view->context)
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pika_fg_bg_view_set_context (view, NULL);
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G_OBJECT_CLASS (parent_class)->dispose (object);
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}
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static void
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pika_fg_bg_view_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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PikaFgBgView *view = PIKA_FG_BG_VIEW (object);
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switch (property_id)
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{
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case PROP_CONTEXT:
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pika_fg_bg_view_set_context (view, g_value_get_object (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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pika_fg_bg_view_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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PikaFgBgView *view = PIKA_FG_BG_VIEW (object);
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switch (property_id)
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{
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case PROP_CONTEXT:
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g_value_set_object (value, view->context);
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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 gboolean
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pika_fg_bg_view_draw (GtkWidget *widget,
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cairo_t *cr)
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{
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PikaFgBgView *view = PIKA_FG_BG_VIEW (widget);
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GtkStyleContext *style = gtk_widget_get_style_context (widget);
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GtkAllocation allocation;
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GtkBorder border;
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GtkBorder padding;
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GdkRectangle rect;
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PikaRGB color;
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gtk_widget_get_allocation (widget, &allocation);
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gtk_style_context_save (style);
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gtk_style_context_get_border (style, gtk_style_context_get_state (style),
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&border);
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gtk_style_context_get_padding (style, gtk_style_context_get_state (style),
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&padding);
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border.left += padding.left;
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border.right += padding.right;
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border.top += padding.top;
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border.bottom += padding.bottom;
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rect.width = (allocation.width - border.left - border.right) * 3 / 4;
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rect.height = (allocation.height - border.top - border.bottom) * 3 / 4;
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if (! view->transform)
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pika_fg_bg_view_create_transform (view);
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/* draw the background area */
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rect.x = allocation.width - rect.width - border.right;
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rect.y = allocation.height - rect.height - border.bottom;
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if (view->context)
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{
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pika_context_get_background (view->context, &color);
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if (view->transform)
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pika_color_transform_process_pixels (view->transform,
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babl_format ("R'G'B'A double"),
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&color,
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babl_format ("R'G'B'A double"),
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&color,
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1);
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pika_cairo_set_source_rgb (cr, &color);
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cairo_rectangle (cr, rect.x, rect.y, rect.width, rect.height);
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cairo_fill (cr);
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}
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gtk_style_context_add_class (style, GTK_STYLE_CLASS_FRAME);
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gtk_render_frame (style, cr, rect.x, rect.y, rect.width, rect.height);
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/* draw the foreground area */
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rect.x = border.left;
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rect.y = border.top;
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if (view->context)
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{
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pika_context_get_foreground (view->context, &color);
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if (view->transform)
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pika_color_transform_process_pixels (view->transform,
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babl_format ("R'G'B'A double"),
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&color,
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babl_format ("R'G'B'A double"),
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&color,
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1);
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pika_cairo_set_source_rgb (cr, &color);
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cairo_rectangle (cr, rect.x, rect.y, rect.width, rect.height);
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cairo_fill (cr);
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}
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gtk_render_frame (style, cr, rect.x, rect.y, rect.width, rect.height);
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gtk_style_context_restore (style);
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return TRUE;
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}
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static void
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pika_fg_bg_view_create_transform (PikaFgBgView *view)
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{
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if (view->color_config)
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{
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static PikaColorProfile *profile = NULL;
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if (G_UNLIKELY (! profile))
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profile = pika_color_profile_new_rgb_srgb ();
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view->transform =
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pika_widget_get_color_transform (GTK_WIDGET (view),
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view->color_config,
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profile,
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babl_format ("R'G'B'A double"),
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babl_format ("R'G'B'A double"),
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NULL,
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PIKA_COLOR_RENDERING_INTENT_RELATIVE_COLORIMETRIC,
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FALSE);
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}
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}
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static void
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pika_fg_bg_view_destroy_transform (PikaFgBgView *view)
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{
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g_clear_object (&view->transform);
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gtk_widget_queue_draw (GTK_WIDGET (view));
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}
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/* public functions */
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GtkWidget *
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pika_fg_bg_view_new (PikaContext *context)
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{
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g_return_val_if_fail (context == NULL || PIKA_IS_CONTEXT (context), NULL);
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return g_object_new (PIKA_TYPE_FG_BG_VIEW,
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"context", context,
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NULL);
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}
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void
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pika_fg_bg_view_set_context (PikaFgBgView *view,
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PikaContext *context)
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{
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g_return_if_fail (PIKA_IS_FG_BG_VIEW (view));
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g_return_if_fail (context == NULL || PIKA_IS_CONTEXT (context));
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if (context != view->context)
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{
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if (view->context)
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{
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g_signal_handlers_disconnect_by_func (view->context,
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gtk_widget_queue_draw,
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view);
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g_clear_object (&view->context);
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g_signal_handlers_disconnect_by_func (view->color_config,
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pika_fg_bg_view_destroy_transform,
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view);
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g_clear_object (&view->color_config);
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}
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view->context = context;
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if (context)
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{
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g_object_ref (context);
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g_signal_connect_swapped (context, "foreground-changed",
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G_CALLBACK (gtk_widget_queue_draw),
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view);
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g_signal_connect_swapped (context, "background-changed",
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G_CALLBACK (gtk_widget_queue_draw),
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view);
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view->color_config = g_object_ref (context->pika->config->color_management);
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g_signal_connect_swapped (view->color_config, "notify",
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G_CALLBACK (pika_fg_bg_view_destroy_transform),
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view);
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}
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pika_fg_bg_view_destroy_transform (view);
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g_object_notify (G_OBJECT (view), "context");
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}
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}
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