552 lines
18 KiB
C
552 lines
18 KiB
C
/* 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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* pikapivotselector.c
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* Copyright (C) 2019 Ell
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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 <gegl.h>
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#include <gtk/gtk.h>
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#include "libpikabase/pikabase.h"
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#include "libpikamath/pikamath.h"
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#include "libpikawidgets/pikawidgets.h"
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#include "widgets-types.h"
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#include "pikapivotselector.h"
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#define EPSILON 1e-6
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enum
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{
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CHANGED,
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LAST_SIGNAL
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};
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enum
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{
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PROP_0,
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PROP_LEFT,
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PROP_TOP,
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PROP_RIGHT,
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PROP_BOTTOM,
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PROP_X,
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PROP_Y
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};
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struct _PikaPivotSelectorPrivate
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{
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gdouble left;
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gdouble top;
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gdouble right;
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gdouble bottom;
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gdouble x;
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gdouble y;
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GtkWidget *buttons[9];
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GtkWidget *active_button;
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};
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/* local function prototypes */
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static void pika_pivot_selector_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_pivot_selector_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 pika_pivot_selector_button_toggled (GtkToggleButton *button,
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PikaPivotSelector *selector);
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static GtkWidget * pika_pivot_selector_position_to_button (PikaPivotSelector *selector,
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gdouble x,
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gdouble y);
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static void pika_pivot_selector_button_to_position (PikaPivotSelector *selector,
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GtkWidget *button,
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gdouble *x,
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gdouble *y);
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static void pika_pivot_selector_update_active_button (PikaPivotSelector *selector);
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G_DEFINE_TYPE_WITH_PRIVATE (PikaPivotSelector, pika_pivot_selector, GTK_TYPE_GRID)
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#define parent_class pika_pivot_selector_parent_class
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static guint pivot_selector_signals[LAST_SIGNAL];
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/* private functions */
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static void
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pika_pivot_selector_class_init (PikaPivotSelectorClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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pivot_selector_signals[CHANGED] =
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g_signal_new ("changed",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (PikaPivotSelectorClass, changed),
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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object_class->get_property = pika_pivot_selector_get_property;
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object_class->set_property = pika_pivot_selector_set_property;
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g_object_class_install_property (object_class, PROP_LEFT,
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g_param_spec_double ("left",
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NULL, NULL,
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-G_MAXDOUBLE,
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+G_MAXDOUBLE,
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0.0,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_TOP,
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g_param_spec_double ("top",
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NULL, NULL,
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-G_MAXDOUBLE,
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+G_MAXDOUBLE,
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0.0,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_RIGHT,
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g_param_spec_double ("right",
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NULL, NULL,
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-G_MAXDOUBLE,
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+G_MAXDOUBLE,
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0.0,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_BOTTOM,
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g_param_spec_double ("bottom",
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NULL, NULL,
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-G_MAXDOUBLE,
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+G_MAXDOUBLE,
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0.0,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_X,
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g_param_spec_double ("x",
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NULL, NULL,
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-G_MAXDOUBLE,
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+G_MAXDOUBLE,
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0.0,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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g_object_class_install_property (object_class, PROP_Y,
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g_param_spec_double ("y",
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NULL, NULL,
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-G_MAXDOUBLE,
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+G_MAXDOUBLE,
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0.0,
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PIKA_PARAM_READWRITE |
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G_PARAM_CONSTRUCT));
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}
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static void
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pika_pivot_selector_init (PikaPivotSelector *selector)
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{
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GtkWidget *widget = GTK_WIDGET (selector);
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GtkGrid *grid = GTK_GRID (selector);
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gint i;
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selector->priv = pika_pivot_selector_get_instance_private (selector);
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gtk_widget_set_halign (widget, GTK_ALIGN_CENTER);
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gtk_widget_set_valign (widget, GTK_ALIGN_CENTER);
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gtk_grid_set_row_homogeneous (grid, TRUE);
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gtk_grid_set_column_homogeneous (grid, TRUE);
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for (i = 0; i < 9; i++)
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{
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static const gchar *icon_names[9] = {
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PIKA_ICON_PIVOT_NORTH_WEST,
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PIKA_ICON_PIVOT_NORTH,
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PIKA_ICON_PIVOT_NORTH_EAST,
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PIKA_ICON_PIVOT_WEST,
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PIKA_ICON_PIVOT_CENTER,
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PIKA_ICON_PIVOT_EAST,
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PIKA_ICON_PIVOT_SOUTH_WEST,
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PIKA_ICON_PIVOT_SOUTH,
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PIKA_ICON_PIVOT_SOUTH_EAST
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};
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GtkWidget *button;
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GtkWidget *image;
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gint x, y;
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x = i % 3;
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y = i / 3;
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button = gtk_toggle_button_new ();
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gtk_widget_set_can_focus (button, FALSE);
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gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
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gtk_grid_attach (grid, button, x, y, 1, 1);
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gtk_widget_show (button);
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selector->priv->buttons[i] = button;
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g_signal_connect (button, "toggled",
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G_CALLBACK (pika_pivot_selector_button_toggled),
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selector);
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image = gtk_image_new_from_icon_name (icon_names[i], GTK_ICON_SIZE_MENU);
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gtk_image_set_pixel_size (GTK_IMAGE (image), 12);
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gtk_container_add (GTK_CONTAINER (button), image);
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gtk_widget_show (image);
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}
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}
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static void
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pika_pivot_selector_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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PikaPivotSelector *selector = PIKA_PIVOT_SELECTOR (object);
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switch (property_id)
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{
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case PROP_LEFT:
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pika_pivot_selector_set_bounds (selector,
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g_value_get_double (value),
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selector->priv->top,
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selector->priv->right,
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selector->priv->bottom);
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break;
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case PROP_TOP:
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pika_pivot_selector_set_bounds (selector,
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selector->priv->left,
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g_value_get_double (value),
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selector->priv->right,
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selector->priv->bottom);
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break;
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case PROP_RIGHT:
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pika_pivot_selector_set_bounds (selector,
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selector->priv->left,
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selector->priv->top,
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g_value_get_double (value),
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selector->priv->bottom);
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break;
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case PROP_BOTTOM:
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pika_pivot_selector_set_bounds (selector,
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selector->priv->left,
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selector->priv->top,
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selector->priv->right,
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g_value_get_double (value));
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break;
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case PROP_X:
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pika_pivot_selector_set_position (selector,
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g_value_get_double (value),
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selector->priv->y);
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break;
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case PROP_Y:
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pika_pivot_selector_set_position (selector,
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selector->priv->x,
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g_value_get_double (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_pivot_selector_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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PikaPivotSelector *selector = PIKA_PIVOT_SELECTOR (object);
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switch (property_id)
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{
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case PROP_LEFT:
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g_value_set_double (value, selector->priv->left);
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break;
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case PROP_TOP:
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g_value_set_double (value, selector->priv->top);
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break;
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case PROP_RIGHT:
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g_value_set_double (value, selector->priv->right);
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break;
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case PROP_BOTTOM:
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g_value_set_double (value, selector->priv->bottom);
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break;
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case PROP_X:
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g_value_set_double (value, selector->priv->x);
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break;
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case PROP_Y:
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g_value_set_double (value, selector->priv->y);
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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_pivot_selector_button_toggled (GtkToggleButton *button,
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PikaPivotSelector *selector)
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{
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if (GTK_WIDGET (button) == selector->priv->active_button)
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{
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gtk_toggle_button_set_active (button, TRUE);
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}
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else
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{
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gdouble x, y;
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pika_pivot_selector_button_to_position (selector, GTK_WIDGET (button),
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&x, &y);
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pika_pivot_selector_set_position (selector, x, y);
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}
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}
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static GtkWidget *
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pika_pivot_selector_position_to_button (PikaPivotSelector *selector,
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gdouble x,
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gdouble y)
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{
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gint ix;
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gint iy;
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if (selector->priv->left == selector->priv->right ||
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selector->priv->top == selector->priv->bottom)
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{
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return NULL;
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}
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x = 2.0 * (x - selector->priv->left) /
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(selector->priv->right - selector->priv->left);
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y = 2.0 * (y - selector->priv->top) /
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(selector->priv->bottom - selector->priv->top);
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ix = RINT (x);
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iy = RINT (y);
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if (fabs (x - ix) > EPSILON || fabs (y - iy) > EPSILON)
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return NULL;
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if (ix < 0 || ix > 2 || iy < 0 || iy > 2)
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return NULL;
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return selector->priv->buttons[3 * iy + ix];
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}
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static void
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pika_pivot_selector_button_to_position (PikaPivotSelector *selector,
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GtkWidget *button,
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gdouble *x,
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gdouble *y)
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{
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gint i;
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for (i = 0; selector->priv->buttons[i] != button; i++);
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*x = selector->priv->left +
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(selector->priv->right - selector->priv->left) * (i % 3) / 2.0;
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*y = selector->priv->top +
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(selector->priv->bottom - selector->priv->top) * (i / 3) / 2.0;
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}
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static void
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pika_pivot_selector_update_active_button (PikaPivotSelector *selector)
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{
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GtkWidget *button;
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button = pika_pivot_selector_position_to_button (selector,
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selector->priv->x,
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selector->priv->y);
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if (button != selector->priv->active_button)
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{
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if (selector->priv->active_button)
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{
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g_signal_handlers_block_by_func (
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selector->priv->active_button,
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pika_pivot_selector_button_toggled,
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selector);
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gtk_toggle_button_set_active (
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GTK_TOGGLE_BUTTON (selector->priv->active_button), FALSE);
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g_signal_handlers_unblock_by_func (
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selector->priv->active_button,
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pika_pivot_selector_button_toggled,
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selector);
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}
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selector->priv->active_button = button;
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if (selector->priv->active_button)
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{
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g_signal_handlers_block_by_func (
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selector->priv->active_button,
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pika_pivot_selector_button_toggled,
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selector);
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gtk_toggle_button_set_active (
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GTK_TOGGLE_BUTTON (selector->priv->active_button), TRUE);
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g_signal_handlers_unblock_by_func (
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selector->priv->active_button,
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pika_pivot_selector_button_toggled,
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selector);
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}
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}
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}
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/* public functions */
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GtkWidget *
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pika_pivot_selector_new (gdouble left,
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gdouble top,
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gdouble right,
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gdouble bottom)
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{
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return g_object_new (PIKA_TYPE_PIVOT_SELECTOR,
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"left", left,
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"top", top,
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"right", right,
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"bottom", bottom,
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"x", (left + right) / 2.0,
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"y", (top + bottom) / 2.0,
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NULL);
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}
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void
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pika_pivot_selector_set_bounds (PikaPivotSelector *selector,
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gdouble left,
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gdouble top,
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gdouble right,
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gdouble bottom)
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{
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g_return_if_fail (PIKA_IS_PIVOT_SELECTOR (selector));
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if (left != selector->priv->left || top != selector->priv->top ||
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right != selector->priv->right || bottom != selector->priv->bottom)
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{
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g_object_freeze_notify (G_OBJECT (selector));
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selector->priv->left = left;
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selector->priv->top = top;
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selector->priv->right = right;
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selector->priv->bottom = bottom;
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pika_pivot_selector_update_active_button (selector);
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if (left != selector->priv->left)
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g_object_notify (G_OBJECT (selector), "left");
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if (top != selector->priv->top)
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g_object_notify (G_OBJECT (selector), "top");
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if (right != selector->priv->right)
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g_object_notify (G_OBJECT (selector), "right");
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if (left != selector->priv->bottom)
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g_object_notify (G_OBJECT (selector), "bottom");
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g_object_thaw_notify (G_OBJECT (selector));
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}
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}
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void
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pika_pivot_selector_get_bounds (PikaPivotSelector *selector,
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gdouble *left,
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gdouble *top,
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gdouble *right,
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gdouble *bottom)
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{
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g_return_if_fail (PIKA_IS_PIVOT_SELECTOR (selector));
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if (left) *left = selector->priv->left;
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if (top) *top = selector->priv->top;
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if (right) *right = selector->priv->right;
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if (bottom) *bottom = selector->priv->bottom;
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}
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void
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pika_pivot_selector_set_position (PikaPivotSelector *selector,
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gdouble x,
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gdouble y)
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{
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g_return_if_fail (PIKA_IS_PIVOT_SELECTOR (selector));
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if (x != selector->priv->x || y != selector->priv->y)
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{
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g_object_freeze_notify (G_OBJECT (selector));
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selector->priv->x = x;
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selector->priv->y = y;
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pika_pivot_selector_update_active_button (selector);
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g_signal_emit (selector, pivot_selector_signals[CHANGED], 0);
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if (x != selector->priv->x)
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g_object_notify (G_OBJECT (selector), "x");
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if (y != selector->priv->y)
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g_object_notify (G_OBJECT (selector), "y");
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g_object_thaw_notify (G_OBJECT (selector));
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}
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}
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void
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pika_pivot_selector_get_position (PikaPivotSelector *selector,
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gdouble *x,
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gdouble *y)
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{
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g_return_if_fail (PIKA_IS_PIVOT_SELECTOR (selector));
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if (x) *x = selector->priv->x;
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if (y) *y = selector->priv->y;
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|
}
|
