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-rw-r--r--app/widgets/gimppivotselector.c547
1 files changed, 547 insertions, 0 deletions
diff --git a/app/widgets/gimppivotselector.c b/app/widgets/gimppivotselector.c
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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimppivotselector.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 "libgimpwidgets/gimpwidgets.h"
+
+#include "widgets-types.h"
+
+#include "core/gimpmarshal.h"
+
+#include "gimppivotselector.h"
+
+
+#define EPSILON 1e-6
+
+
+enum
+{
+ CHANGED,
+ LAST_SIGNAL
+};
+
+enum
+{
+ PROP_0,
+ PROP_LEFT,
+ PROP_TOP,
+ PROP_RIGHT,
+ PROP_BOTTOM,
+ PROP_X,
+ PROP_Y
+};
+
+
+struct _GimpPivotSelectorPrivate
+{
+ gdouble left;
+ gdouble top;
+ gdouble right;
+ gdouble bottom;
+
+ gdouble x;
+ gdouble y;
+
+ GtkWidget *buttons[9];
+ GtkWidget *active_button;
+};
+
+
+/* local function prototypes */
+
+static void gimp_pivot_selector_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec);
+static void gimp_pivot_selector_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec);
+
+static void gimp_pivot_selector_button_toggled (GtkToggleButton *button,
+ GimpPivotSelector *selector);
+
+static GtkWidget * gimp_pivot_selector_position_to_button (GimpPivotSelector *selector,
+ gdouble x,
+ gdouble y);
+static void gimp_pivot_selector_button_to_position (GimpPivotSelector *selector,
+ GtkWidget *button,
+ gdouble *x,
+ gdouble *y);
+
+static void gimp_pivot_selector_update_active_button (GimpPivotSelector *selector);
+
+
+G_DEFINE_TYPE_WITH_PRIVATE (GimpPivotSelector, gimp_pivot_selector, GTK_TYPE_TABLE)
+
+#define parent_class gimp_pivot_selector_parent_class
+
+static guint pivot_selector_signals[LAST_SIGNAL];
+
+
+/* private functions */
+
+
+static void
+gimp_pivot_selector_class_init (GimpPivotSelectorClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ pivot_selector_signals[CHANGED] =
+ g_signal_new ("changed",
+ G_TYPE_FROM_CLASS (klass),
+ G_SIGNAL_RUN_FIRST,
+ G_STRUCT_OFFSET (GimpPivotSelectorClass, changed),
+ NULL, NULL,
+ gimp_marshal_VOID__VOID,
+ G_TYPE_NONE, 0);
+
+ object_class->get_property = gimp_pivot_selector_get_property;
+ object_class->set_property = gimp_pivot_selector_set_property;
+
+ g_object_class_install_property (object_class, PROP_LEFT,
+ g_param_spec_double ("left",
+ NULL, NULL,
+ -G_MAXDOUBLE,
+ +G_MAXDOUBLE,
+ 0.0,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+
+ g_object_class_install_property (object_class, PROP_TOP,
+ g_param_spec_double ("top",
+ NULL, NULL,
+ -G_MAXDOUBLE,
+ +G_MAXDOUBLE,
+ 0.0,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+
+ g_object_class_install_property (object_class, PROP_RIGHT,
+ g_param_spec_double ("right",
+ NULL, NULL,
+ -G_MAXDOUBLE,
+ +G_MAXDOUBLE,
+ 0.0,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+
+ g_object_class_install_property (object_class, PROP_BOTTOM,
+ g_param_spec_double ("bottom",
+ NULL, NULL,
+ -G_MAXDOUBLE,
+ +G_MAXDOUBLE,
+ 0.0,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+
+ g_object_class_install_property (object_class, PROP_X,
+ g_param_spec_double ("x",
+ NULL, NULL,
+ -G_MAXDOUBLE,
+ +G_MAXDOUBLE,
+ 0.0,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+
+ g_object_class_install_property (object_class, PROP_Y,
+ g_param_spec_double ("y",
+ NULL, NULL,
+ -G_MAXDOUBLE,
+ +G_MAXDOUBLE,
+ 0.0,
+ GIMP_PARAM_READWRITE |
+ G_PARAM_CONSTRUCT));
+}
+
+static void
+gimp_pivot_selector_init (GimpPivotSelector *selector)
+{
+ GtkTable *table = GTK_TABLE (selector);
+ gint i;
+
+ selector->priv = gimp_pivot_selector_get_instance_private (selector);
+
+ gtk_table_resize (table, 3, 3);
+ gtk_table_set_homogeneous (table, TRUE);
+
+ for (i = 0; i < 9; i++)
+ {
+ static const gchar *icon_names[9] = {
+ GIMP_ICON_PIVOT_NORTH_WEST,
+ GIMP_ICON_PIVOT_NORTH,
+ GIMP_ICON_PIVOT_NORTH_EAST,
+
+ GIMP_ICON_PIVOT_WEST,
+ GIMP_ICON_PIVOT_CENTER,
+ GIMP_ICON_PIVOT_EAST,
+
+ GIMP_ICON_PIVOT_SOUTH_WEST,
+ GIMP_ICON_PIVOT_SOUTH,
+ GIMP_ICON_PIVOT_SOUTH_EAST
+ };
+
+ GtkWidget *button;
+ GtkWidget *image;
+ gint x, y;
+
+ x = i % 3;
+ y = i / 3;
+
+ button = gtk_toggle_button_new ();
+ gtk_widget_set_can_focus (button, FALSE);
+ gtk_button_set_relief (GTK_BUTTON (button), GTK_RELIEF_NONE);
+ gtk_table_attach_defaults (table, button,
+ x, x + 1, y, y + 1);
+ gtk_widget_show (button);
+
+ selector->priv->buttons[i] = button;
+
+ g_signal_connect (button, "toggled",
+ G_CALLBACK (gimp_pivot_selector_button_toggled),
+ selector);
+
+ image = gtk_image_new_from_icon_name (icon_names[i], GTK_ICON_SIZE_MENU);
+ gtk_image_set_pixel_size (GTK_IMAGE (image), 12);
+ gtk_container_add (GTK_CONTAINER (button), image);
+ gtk_widget_show (image);
+ }
+}
+
+static void
+gimp_pivot_selector_set_property (GObject *object,
+ guint property_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GimpPivotSelector *selector = GIMP_PIVOT_SELECTOR (object);
+
+ switch (property_id)
+ {
+ case PROP_LEFT:
+ gimp_pivot_selector_set_bounds (selector,
+ g_value_get_double (value),
+ selector->priv->top,
+ selector->priv->right,
+ selector->priv->bottom);
+ break;
+ case PROP_TOP:
+ gimp_pivot_selector_set_bounds (selector,
+ selector->priv->left,
+ g_value_get_double (value),
+ selector->priv->right,
+ selector->priv->bottom);
+ break;
+ case PROP_RIGHT:
+ gimp_pivot_selector_set_bounds (selector,
+ selector->priv->left,
+ selector->priv->top,
+ g_value_get_double (value),
+ selector->priv->bottom);
+ break;
+ case PROP_BOTTOM:
+ gimp_pivot_selector_set_bounds (selector,
+ selector->priv->left,
+ selector->priv->top,
+ selector->priv->right,
+ g_value_get_double (value));
+ break;
+
+ case PROP_X:
+ gimp_pivot_selector_set_position (selector,
+ g_value_get_double (value),
+ selector->priv->y);
+ break;
+ case PROP_Y:
+ gimp_pivot_selector_set_position (selector,
+ selector->priv->x,
+ g_value_get_double (value));
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_pivot_selector_get_property (GObject *object,
+ guint property_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GimpPivotSelector *selector = GIMP_PIVOT_SELECTOR (object);
+
+ switch (property_id)
+ {
+ case PROP_LEFT:
+ g_value_set_double (value, selector->priv->left);
+ break;
+ case PROP_TOP:
+ g_value_set_double (value, selector->priv->top);
+ break;
+ case PROP_RIGHT:
+ g_value_set_double (value, selector->priv->right);
+ break;
+ case PROP_BOTTOM:
+ g_value_set_double (value, selector->priv->bottom);
+ break;
+
+ case PROP_X:
+ g_value_set_double (value, selector->priv->x);
+ break;
+ case PROP_Y:
+ g_value_set_double (value, selector->priv->y);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+ break;
+ }
+}
+
+static void
+gimp_pivot_selector_button_toggled (GtkToggleButton *button,
+ GimpPivotSelector *selector)
+{
+ if (GTK_WIDGET (button) == selector->priv->active_button)
+ {
+ gtk_toggle_button_set_active (button, TRUE);
+ }
+ else
+ {
+ gdouble x, y;
+
+ gimp_pivot_selector_button_to_position (selector, GTK_WIDGET (button),
+ &x, &y);
+
+ gimp_pivot_selector_set_position (selector, x, y);
+ }
+}
+
+static GtkWidget *
+gimp_pivot_selector_position_to_button (GimpPivotSelector *selector,
+ gdouble x,
+ gdouble y)
+{
+ gint ix;
+ gint iy;
+
+ if (selector->priv->left == selector->priv->right ||
+ selector->priv->top == selector->priv->bottom)
+ {
+ return NULL;
+ }
+
+ x = 2.0 * (x - selector->priv->left) /
+ (selector->priv->right - selector->priv->left);
+ y = 2.0 * (y - selector->priv->top) /
+ (selector->priv->bottom - selector->priv->top);
+
+ ix = RINT (x);
+ iy = RINT (y);
+
+ if (fabs (x - ix) > EPSILON || fabs (y - iy) > EPSILON)
+ return NULL;
+
+ if (ix < 0 || ix > 2 || iy < 0 || iy > 2)
+ return NULL;
+
+ return selector->priv->buttons[3 * iy + ix];
+}
+
+static void
+gimp_pivot_selector_button_to_position (GimpPivotSelector *selector,
+ GtkWidget *button,
+ gdouble *x,
+ gdouble *y)
+{
+ gint i;
+
+ for (i = 0; selector->priv->buttons[i] != button; i++);
+
+ *x = selector->priv->left +
+ (selector->priv->right - selector->priv->left) * (i % 3) / 2.0;
+ *y = selector->priv->top +
+ (selector->priv->bottom - selector->priv->top) * (i / 3) / 2.0;
+}
+
+static void
+gimp_pivot_selector_update_active_button (GimpPivotSelector *selector)
+{
+ GtkWidget *button;
+
+ button = gimp_pivot_selector_position_to_button (selector,
+ selector->priv->x,
+ selector->priv->y);
+
+ if (button != selector->priv->active_button)
+ {
+ if (selector->priv->active_button)
+ {
+ g_signal_handlers_block_by_func (
+ selector->priv->active_button,
+ gimp_pivot_selector_button_toggled,
+ selector);
+
+ gtk_toggle_button_set_active (
+ GTK_TOGGLE_BUTTON (selector->priv->active_button), FALSE);
+
+ g_signal_handlers_unblock_by_func (
+ selector->priv->active_button,
+ gimp_pivot_selector_button_toggled,
+ selector);
+ }
+
+ selector->priv->active_button = button;
+
+ if (selector->priv->active_button)
+ {
+ g_signal_handlers_block_by_func (
+ selector->priv->active_button,
+ gimp_pivot_selector_button_toggled,
+ selector);
+
+ gtk_toggle_button_set_active (
+ GTK_TOGGLE_BUTTON (selector->priv->active_button), TRUE);
+
+ g_signal_handlers_unblock_by_func (
+ selector->priv->active_button,
+ gimp_pivot_selector_button_toggled,
+ selector);
+ }
+ }
+}
+
+
+/* public functions */
+
+
+GtkWidget *
+gimp_pivot_selector_new (gdouble left,
+ gdouble top,
+ gdouble right,
+ gdouble bottom)
+{
+ return g_object_new (GIMP_TYPE_PIVOT_SELECTOR,
+
+ "left", left,
+ "top", top,
+ "right", right,
+ "bottom", bottom,
+
+ "x", (left + right) / 2.0,
+ "y", (top + bottom) / 2.0,
+
+ NULL);
+}
+
+void
+gimp_pivot_selector_set_bounds (GimpPivotSelector *selector,
+ gdouble left,
+ gdouble top,
+ gdouble right,
+ gdouble bottom)
+{
+ g_return_if_fail (GIMP_IS_PIVOT_SELECTOR (selector));
+
+ if (left != selector->priv->left || top != selector->priv->top ||
+ right != selector->priv->right || bottom != selector->priv->bottom)
+ {
+ g_object_freeze_notify (G_OBJECT (selector));
+
+ selector->priv->left = left;
+ selector->priv->top = top;
+ selector->priv->right = right;
+ selector->priv->bottom = bottom;
+
+ gimp_pivot_selector_update_active_button (selector);
+
+ if (left != selector->priv->left)
+ g_object_notify (G_OBJECT (selector), "left");
+ if (top != selector->priv->top)
+ g_object_notify (G_OBJECT (selector), "top");
+ if (right != selector->priv->right)
+ g_object_notify (G_OBJECT (selector), "right");
+ if (left != selector->priv->bottom)
+ g_object_notify (G_OBJECT (selector), "bottom");
+
+ g_object_thaw_notify (G_OBJECT (selector));
+ }
+}
+
+void
+gimp_pivot_selector_get_bounds (GimpPivotSelector *selector,
+ gdouble *left,
+ gdouble *top,
+ gdouble *right,
+ gdouble *bottom)
+{
+ g_return_if_fail (GIMP_IS_PIVOT_SELECTOR (selector));
+
+ if (left) *left = selector->priv->left;
+ if (top) *top = selector->priv->top;
+ if (right) *right = selector->priv->right;
+ if (bottom) *bottom = selector->priv->bottom;
+}
+
+void
+gimp_pivot_selector_set_position (GimpPivotSelector *selector,
+ gdouble x,
+ gdouble y)
+{
+ g_return_if_fail (GIMP_IS_PIVOT_SELECTOR (selector));
+
+ if (x != selector->priv->x || y != selector->priv->y)
+ {
+ g_object_freeze_notify (G_OBJECT (selector));
+
+ selector->priv->x = x;
+ selector->priv->y = y;
+
+ gimp_pivot_selector_update_active_button (selector);
+
+ g_signal_emit (selector, pivot_selector_signals[CHANGED], 0);
+
+ if (x != selector->priv->x)
+ g_object_notify (G_OBJECT (selector), "x");
+ if (y != selector->priv->y)
+ g_object_notify (G_OBJECT (selector), "y");
+
+ g_object_thaw_notify (G_OBJECT (selector));
+ }
+}
+
+void
+gimp_pivot_selector_get_position (GimpPivotSelector *selector,
+ gdouble *x,
+ gdouble *y)
+{
+ g_return_if_fail (GIMP_IS_PIVOT_SELECTOR (selector));
+
+ if (x) *x = selector->priv->x;
+ if (y) *y = selector->priv->y;
+}