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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:30:19 +0000 |
commit | 5c1676dfe6d2f3c837a5e074117b45613fd29a72 (patch) | |
tree | cbffb45144febf451e54061db2b21395faf94bfe /libgimp/gimpgradientselectbutton.c | |
parent | Initial commit. (diff) | |
download | gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.tar.xz gimp-5c1676dfe6d2f3c837a5e074117b45613fd29a72.zip |
Adding upstream version 2.10.34.upstream/2.10.34upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | libgimp/gimpgradientselectbutton.c | 628 |
1 files changed, 628 insertions, 0 deletions
diff --git a/libgimp/gimpgradientselectbutton.c b/libgimp/gimpgradientselectbutton.c new file mode 100644 index 0000000..fac6e3a --- /dev/null +++ b/libgimp/gimpgradientselectbutton.c @@ -0,0 +1,628 @@ +/* LIBGIMP - The GIMP Library + * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball + * + * gimpgradientselectbutton.c + * Copyright (C) 1998 Andy Thomas + * + * This library is free software: you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 3 of the License, or (at your option) any later version. + * + * This library 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 + * Library General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <https://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <gegl.h> +#include <gtk/gtk.h> + +#include "libgimpwidgets/gimpwidgets.h" + +#include "gimp.h" + +#include "gimpuitypes.h" +#include "gimpgradientselectbutton.h" +#include "gimpuimarshal.h" + +#include "libgimp-intl.h" + + +/** + * SECTION: gimpgradientselectbutton + * @title: GimpGradientSelectButton + * @short_description: A button which pops up a gradient select dialog. + * + * A button which pops up a gradient select dialog. + **/ + + +#define CELL_HEIGHT 18 +#define CELL_WIDTH 84 + + +#define GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE(obj) ((GimpGradientSelectButtonPrivate *) gimp_gradient_select_button_get_instance_private ((GimpGradientSelectButton *) (obj))) + +typedef struct _GimpGradientSelectButtonPrivate GimpGradientSelectButtonPrivate; + +struct _GimpGradientSelectButtonPrivate +{ + gchar *title; + + gchar *gradient_name; /* Local copy */ + gint sample_size; + gboolean reverse; + gint n_samples; + gdouble *gradient_data; /* Local copy */ + + GtkWidget *inside; + GtkWidget *preview; +}; + +enum +{ + GRADIENT_SET, + LAST_SIGNAL +}; + +enum +{ + PROP_0, + PROP_TITLE, + PROP_GRADIENT_NAME +}; + + +/* local function prototypes */ + +static void gimp_gradient_select_button_finalize (GObject *object); + +static void gimp_gradient_select_button_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec); +static void gimp_gradient_select_button_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec); + +static void gimp_gradient_select_button_clicked (GimpGradientSelectButton *button); + +static void gimp_gradient_select_button_callback (const gchar *gradient_name, + gint n_samples, + const gdouble *gradient_data, + gboolean dialog_closing, + gpointer user_data); + +static void gimp_gradient_select_preview_size_allocate + (GtkWidget *widget, + GtkAllocation *allocation, + GimpGradientSelectButton *button); +static gboolean gimp_gradient_select_preview_expose (GtkWidget *preview, + GdkEventExpose *event, + GimpGradientSelectButton *button); + +static void gimp_gradient_select_drag_data_received (GimpGradientSelectButton *button, + GdkDragContext *context, + gint x, + gint y, + GtkSelectionData *selection, + guint info, + guint time); + +static GtkWidget * gimp_gradient_select_button_create_inside (GimpGradientSelectButton *button); + + +static const GtkTargetEntry target = { "application/x-gimp-gradient-name", 0 }; + +static guint gradient_button_signals[LAST_SIGNAL] = { 0 }; + + +G_DEFINE_TYPE_WITH_PRIVATE (GimpGradientSelectButton, + gimp_gradient_select_button, + GIMP_TYPE_SELECT_BUTTON) + + +static void +gimp_gradient_select_button_class_init (GimpGradientSelectButtonClass *klass) +{ + GObjectClass *object_class = G_OBJECT_CLASS (klass); + GimpSelectButtonClass *select_button_class = GIMP_SELECT_BUTTON_CLASS (klass); + + object_class->finalize = gimp_gradient_select_button_finalize; + object_class->set_property = gimp_gradient_select_button_set_property; + object_class->get_property = gimp_gradient_select_button_get_property; + + select_button_class->select_destroy = gimp_gradient_select_destroy; + + klass->gradient_set = NULL; + + /** + * GimpGradientSelectButton:title: + * + * The title to be used for the gradient selection popup dialog. + * + * Since: 2.4 + */ + g_object_class_install_property (object_class, PROP_TITLE, + g_param_spec_string ("title", + "Title", + "The title to be used for the gradient selection popup dialog", + _("Gradient Selection"), + GIMP_PARAM_READWRITE | + G_PARAM_CONSTRUCT_ONLY)); + + /** + * GimpGradientSelectButton:gradient-name: + * + * The name of the currently selected gradient. + * + * Since: 2.4 + */ + g_object_class_install_property (object_class, PROP_GRADIENT_NAME, + g_param_spec_string ("gradient-name", + "Gradient name", + "The name of the currently selected gradient", + NULL, + GIMP_PARAM_READWRITE)); + + /** + * GimpGradientSelectButton::gradient-set: + * @widget: the object which received the signal. + * @gradient_name: the name of the currently selected gradient. + * @width: width of the gradient + * @grad_data: gradient data + * @dialog_closing: whether the dialog was closed or not. + * + * The ::gradient-set signal is emitted when the user selects a gradient. + * + * Since: 2.4 + */ + gradient_button_signals[GRADIENT_SET] = + g_signal_new ("gradient-set", + G_TYPE_FROM_CLASS (klass), + G_SIGNAL_RUN_FIRST, + G_STRUCT_OFFSET (GimpGradientSelectButtonClass, gradient_set), + NULL, NULL, + _gimpui_marshal_VOID__STRING_INT_POINTER_BOOLEAN, + G_TYPE_NONE, 4, + G_TYPE_STRING, + G_TYPE_INT, + G_TYPE_POINTER, + G_TYPE_BOOLEAN); +} + +static void +gimp_gradient_select_button_init (GimpGradientSelectButton *button) +{ + GimpGradientSelectButtonPrivate *priv; + + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button); + + priv->gradient_name = gimp_context_get_gradient (); + priv->sample_size = CELL_WIDTH; + priv->reverse = FALSE; + + priv->inside = gimp_gradient_select_button_create_inside (button); + gtk_container_add (GTK_CONTAINER (button), priv->inside); +} + +/** + * gimp_gradient_select_button_new: + * @title: Title of the dialog to use or %NULL to use the default title. + * @gradient_name: Initial gradient name. + * + * Creates a new #GtkWidget that completely controls the selection of + * a gradient. This widget is suitable for placement in a table in a + * plug-in dialog. + * + * Returns: A #GtkWidget that you can use in your UI. + * + * Since: 2.4 + */ +GtkWidget * +gimp_gradient_select_button_new (const gchar *title, + const gchar *gradient_name) +{ + GtkWidget *button; + + if (title) + button = g_object_new (GIMP_TYPE_GRADIENT_SELECT_BUTTON, + "title", title, + "gradient-name", gradient_name, + NULL); + else + button = g_object_new (GIMP_TYPE_GRADIENT_SELECT_BUTTON, + "gradient-name", gradient_name, + NULL); + + return button; +} + +/** + * gimp_gradient_select_button_get_gradient: + * @button: A #GimpGradientSelectButton + * + * Retrieves the name of currently selected gradient. + * + * Returns: an internal copy of the gradient name which must not be freed. + * + * Since: 2.4 + */ +const gchar * +gimp_gradient_select_button_get_gradient (GimpGradientSelectButton *button) +{ + GimpGradientSelectButtonPrivate *priv; + + g_return_val_if_fail (GIMP_IS_GRADIENT_SELECT_BUTTON (button), NULL); + + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button); + return priv->gradient_name; +} + +/** + * gimp_gradient_select_button_set_gradient: + * @button: A #GimpGradientSelectButton + * @gradient_name: Gradient name to set. + * + * Sets the current gradient for the gradient select button. + * + * Since: 2.4 + */ +void +gimp_gradient_select_button_set_gradient (GimpGradientSelectButton *button, + const gchar *gradient_name) +{ + GimpGradientSelectButtonPrivate *priv; + GimpSelectButton *select_button; + + g_return_if_fail (GIMP_IS_GRADIENT_SELECT_BUTTON (button)); + + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button); + select_button = GIMP_SELECT_BUTTON (button); + + if (select_button->temp_callback) + { + gimp_gradients_set_popup (select_button->temp_callback, gradient_name); + } + else + { + gchar *name; + gdouble *samples; + gint n_samples; + + if (gradient_name && *gradient_name) + name = g_strdup (gradient_name); + else + name = gimp_context_get_gradient (); + + if (gimp_gradient_get_uniform_samples (name, + priv->sample_size, + priv->reverse, + &n_samples, + &samples)) + { + gimp_gradient_select_button_callback (name, + n_samples, samples, + FALSE, button); + + g_free (samples); + } + + g_free (name); + } +} + + +/* private functions */ + +static void +gimp_gradient_select_button_finalize (GObject *object) +{ + GimpGradientSelectButtonPrivate *priv; + + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (object); + + g_clear_pointer (&priv->gradient_name, g_free); + g_clear_pointer (&priv->gradient_data, g_free); + g_clear_pointer (&priv->title, g_free); + + G_OBJECT_CLASS (gimp_gradient_select_button_parent_class)->finalize (object); +} + +static void +gimp_gradient_select_button_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + GimpGradientSelectButton *button; + GimpGradientSelectButtonPrivate *priv; + + button = GIMP_GRADIENT_SELECT_BUTTON (object); + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button); + + switch (property_id) + { + case PROP_TITLE: + priv->title = g_value_dup_string (value); + break; + case PROP_GRADIENT_NAME: + gimp_gradient_select_button_set_gradient (button, + g_value_get_string (value)); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_gradient_select_button_get_property (GObject *object, + guint property_id, + GValue *value, + GParamSpec *pspec) +{ + GimpGradientSelectButton *button; + GimpGradientSelectButtonPrivate *priv; + + button = GIMP_GRADIENT_SELECT_BUTTON (object); + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button); + + switch (property_id) + { + case PROP_TITLE: + g_value_set_string (value, priv->title); + break; + case PROP_GRADIENT_NAME: + g_value_set_string (value, priv->gradient_name); + break; + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +gimp_gradient_select_button_callback (const gchar *gradient_name, + gint n_samples, + const gdouble *gradient_data, + gboolean dialog_closing, + gpointer user_data) +{ + GimpGradientSelectButton *button; + GimpGradientSelectButtonPrivate *priv; + GimpSelectButton *select_button; + + button = GIMP_GRADIENT_SELECT_BUTTON (user_data); + + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button); + select_button = GIMP_SELECT_BUTTON (button); + + g_free (priv->gradient_name); + g_free (priv->gradient_data); + + priv->gradient_name = g_strdup (gradient_name); + priv->n_samples = n_samples; + priv->gradient_data = g_memdup (gradient_data, n_samples * sizeof (gdouble)); + + gtk_widget_queue_draw (priv->preview); + + if (dialog_closing) + select_button->temp_callback = NULL; + + g_signal_emit (button, gradient_button_signals[GRADIENT_SET], 0, + gradient_name, n_samples, gradient_data, dialog_closing); + g_object_notify (G_OBJECT (button), "gradient-name"); +} + +static void +gimp_gradient_select_button_clicked (GimpGradientSelectButton *button) +{ + GimpGradientSelectButtonPrivate *priv; + GimpSelectButton *select_button; + + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button); + select_button = GIMP_SELECT_BUTTON (button); + + if (select_button->temp_callback) + { + /* calling gimp_gradients_set_popup() raises the dialog */ + gimp_gradients_set_popup (select_button->temp_callback, + priv->gradient_name); + } + else + { + select_button->temp_callback = + gimp_gradient_select_new (priv->title, priv->gradient_name, + priv->sample_size, + gimp_gradient_select_button_callback, + button); + } +} + +static void +gimp_gradient_select_preview_size_allocate (GtkWidget *widget, + GtkAllocation *allocation, + GimpGradientSelectButton *button) +{ + gdouble *samples; + gint n_samples; + GimpGradientSelectButtonPrivate *priv; + + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button); + + if (gimp_gradient_get_uniform_samples (priv->gradient_name, + allocation->width, + priv->reverse, + &n_samples, + &samples)) + { + g_free (priv->gradient_data); + + priv->sample_size = allocation->width; + priv->n_samples = n_samples; + priv->gradient_data = samples; + } +} + +static gboolean +gimp_gradient_select_preview_expose (GtkWidget *widget, + GdkEventExpose *event, + GimpGradientSelectButton *button) +{ + GimpGradientSelectButtonPrivate *priv; + GtkAllocation allocation; + cairo_t *cr; + cairo_pattern_t *pattern; + cairo_surface_t *surface; + const gdouble *src; + guchar *dest; + gint width; + gint x; + + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (button); + + src = priv->gradient_data; + if (! src) + return FALSE; + + gtk_widget_get_allocation (widget, &allocation); + + cr = gdk_cairo_create (event->window); + + gdk_cairo_region (cr, event->region); + cairo_clip (cr); + + pattern = gimp_cairo_checkerboard_create (cr, GIMP_CHECK_SIZE_SM, NULL, NULL); + cairo_set_source (cr, pattern); + cairo_pattern_destroy (pattern); + + cairo_paint (cr); + + width = priv->n_samples / 4; + + surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, 1); + + for (x = 0, dest = cairo_image_surface_get_data (surface); + x < width; + x++, src += 4, dest += 4) + { + GimpRGB color; + guchar r, g, b, a; + + gimp_rgba_set (&color, src[0], src[1], src[2], src[3]); + gimp_rgba_get_uchar (&color, &r, &g, &b, &a); + + GIMP_CAIRO_ARGB32_SET_PIXEL(dest, r, g, b, a); + } + + cairo_surface_mark_dirty (surface); + + pattern = cairo_pattern_create_for_surface (surface); + cairo_pattern_set_extend (pattern, CAIRO_EXTEND_REFLECT); + cairo_surface_destroy (surface); + + cairo_scale (cr, (gdouble) allocation.width / (gdouble) width, 1.0); + + cairo_set_source (cr, pattern); + cairo_pattern_destroy (pattern); + + cairo_paint (cr); + + cairo_destroy (cr); + + return FALSE; +} + +static void +gimp_gradient_select_drag_data_received (GimpGradientSelectButton *button, + GdkDragContext *context, + gint x, + gint y, + GtkSelectionData *selection, + guint info, + guint time) +{ + gint length = gtk_selection_data_get_length (selection); + gchar *str; + + if (gtk_selection_data_get_format (selection) != 8 || length < 1) + { + g_warning ("%s: received invalid gradient data", G_STRFUNC); + return; + } + + str = g_strndup ((const gchar *) gtk_selection_data_get_data (selection), + length); + + if (g_utf8_validate (str, -1, NULL)) + { + gint pid; + gpointer unused; + gint name_offset = 0; + + if (sscanf (str, "%i:%p:%n", &pid, &unused, &name_offset) >= 2 && + pid == gimp_getpid () && name_offset > 0) + { + gchar *name = str + name_offset; + + gimp_gradient_select_button_set_gradient (button, name); + } + } + + g_free (str); +} + +static GtkWidget * +gimp_gradient_select_button_create_inside (GimpGradientSelectButton *gradient_button) +{ + GtkWidget *button; + GimpGradientSelectButtonPrivate *priv; + + priv = GIMP_GRADIENT_SELECT_BUTTON_GET_PRIVATE (gradient_button); + + gtk_widget_push_composite_child (); + + button = gtk_button_new (); + + priv->preview = gtk_drawing_area_new (); + gtk_widget_set_size_request (priv->preview, CELL_WIDTH, CELL_HEIGHT); + gtk_container_add (GTK_CONTAINER (button), priv->preview); + + g_signal_connect (priv->preview, "size-allocate", + G_CALLBACK (gimp_gradient_select_preview_size_allocate), + gradient_button); + + g_signal_connect (priv->preview, "expose-event", + G_CALLBACK (gimp_gradient_select_preview_expose), + gradient_button); + + gtk_widget_show_all (button); + + g_signal_connect_swapped (button, "clicked", + G_CALLBACK (gimp_gradient_select_button_clicked), + gradient_button); + + gtk_drag_dest_set (GTK_WIDGET (button), + GTK_DEST_DEFAULT_HIGHLIGHT | + GTK_DEST_DEFAULT_MOTION | + GTK_DEST_DEFAULT_DROP, + &target, 1, + GDK_ACTION_COPY); + + g_signal_connect_swapped (button, "drag-data-received", + G_CALLBACK (gimp_gradient_select_drag_data_received), + gradient_button); + + gtk_widget_pop_composite_child (); + + return button; +} |