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Diffstat (limited to 'app/widgets/gimppivotselector.c')
| -rw-r--r-- | app/widgets/gimppivotselector.c | 547 |
1 files changed, 547 insertions, 0 deletions
diff --git a/app/widgets/gimppivotselector.c b/app/widgets/gimppivotselector.c new file mode 100644 index 0000000..598513a --- /dev/null +++ b/app/widgets/gimppivotselector.c @@ -0,0 +1,547 @@ +/* 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; +} |