mirror of https://github.com/GNOME/gimp.git
528 lines
17 KiB
C
528 lines
17 KiB
C
/* LIBGIMP - The GIMP Library
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* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
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*
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* gimppatternmenu.c
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* Copyright (C) 1998 Andy Thomas
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <string.h>
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#include "gimp.h"
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#include "gimpui.h"
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#include "libgimp-intl.h"
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#define PATTERN_SELECT_DATA_KEY "gimp-pattern-select-data"
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#define CELL_SIZE 20
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typedef struct _PatternSelect PatternSelect;
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struct _PatternSelect
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{
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gchar *title;
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GimpRunPatternCallback callback;
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gpointer data;
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GtkWidget *preview;
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GtkWidget *button;
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GtkWidget *popup;
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gchar *pattern_name; /* Local copy */
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gint width;
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gint height;
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gint bytes;
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guchar *mask_data; /* local copy */
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const gchar *temp_pattern_callback;
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};
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static void gimp_pattern_select_widget_callback (const gchar *name,
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gint width,
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gint height,
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gint bytes,
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const guchar *mask_data,
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gboolean closing,
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gpointer data);
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static void gimp_pattern_select_widget_clicked (GtkWidget *widget,
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PatternSelect *pattern_sel);
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static void gimp_pattern_select_widget_destroy (GtkWidget *widget,
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PatternSelect *pattern_sel);
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static gboolean gimp_pattern_select_preview_events (GtkWidget *widget,
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GdkEvent *event,
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PatternSelect *pattern_sel);
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static void gimp_pattern_select_preview_update (GtkWidget *preview,
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gint width,
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gint height,
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gint bytes,
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const guchar *mask_data);
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static void gimp_pattern_select_preview_resize (PatternSelect *pattern_sel);
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static void gimp_pattern_select_popup_open (PatternSelect *pattern_sel,
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gint x,
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gint y);
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static void gimp_pattern_select_popup_close (PatternSelect *pattern_sel);
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static void gimp_pattern_select_drag_data_received (GtkWidget *preview,
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GdkDragContext *context,
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gint x,
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gint y,
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GtkSelectionData *selection,
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guint info,
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guint time,
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GtkWidget *widget);
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static const GtkTargetEntry target = { "application/x-gimp-pattern-name", 0 };
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/**
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* gimp_pattern_select_widget_new:
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* @title: Title of the dialog to use or %NULL to use the default title.
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* @pattern_name: Initial pattern name or %NULL to use current selection.
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* @callback: A function to call when the selected pattern changes.
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* @data: A pointer to arbitary data to be used in the call to @callback.
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*
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* Creates a new #GtkWidget that completely controls the selection of
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* a pattern. This widget is suitable for placement in a table in a
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* plug-in dialog.
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*
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* Returns: A #GtkWidget that you can use in your UI.
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*/
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GtkWidget *
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gimp_pattern_select_widget_new (const gchar *title,
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const gchar *pattern_name,
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GimpRunPatternCallback callback,
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gpointer data)
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{
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PatternSelect *pattern_sel;
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GtkWidget *frame;
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GtkWidget *hbox;
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gint mask_data_size;
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g_return_val_if_fail (callback != NULL, NULL);
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if (! title)
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title = _("Pattern Selection");
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pattern_sel = g_new0 (PatternSelect, 1);
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pattern_sel->title = g_strdup (title);
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pattern_sel->callback = callback;
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pattern_sel->data = data;
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hbox = gtk_hbox_new (FALSE, 6);
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frame = gtk_frame_new (NULL);
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gtk_frame_set_shadow_type (GTK_FRAME(frame), GTK_SHADOW_IN);
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gtk_box_pack_start (GTK_BOX (hbox), frame, FALSE, FALSE, 0);
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gtk_widget_show (frame);
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pattern_sel->preview = gimp_preview_area_new ();
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gtk_widget_add_events (pattern_sel->preview,
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GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK);
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gtk_widget_set_size_request (pattern_sel->preview, CELL_SIZE, CELL_SIZE);
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gtk_container_add (GTK_CONTAINER (frame), pattern_sel->preview);
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gtk_widget_show (pattern_sel->preview);
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g_signal_connect_swapped (pattern_sel->preview, "size-allocate",
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G_CALLBACK (gimp_pattern_select_preview_resize),
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pattern_sel);
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g_signal_connect (pattern_sel->preview, "event",
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G_CALLBACK (gimp_pattern_select_preview_events),
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pattern_sel);
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gtk_drag_dest_set (GTK_WIDGET (pattern_sel->preview),
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GTK_DEST_DEFAULT_HIGHLIGHT |
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GTK_DEST_DEFAULT_MOTION |
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GTK_DEST_DEFAULT_DROP,
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&target, 1,
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GDK_ACTION_COPY);
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g_signal_connect (pattern_sel->preview, "drag-data-received",
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G_CALLBACK (gimp_pattern_select_drag_data_received),
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hbox);
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pattern_sel->button = gtk_button_new_with_mnemonic (_("_Browse..."));
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gtk_box_pack_start (GTK_BOX (hbox), pattern_sel->button, TRUE, TRUE, 0);
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gtk_widget_show (pattern_sel->button);
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g_signal_connect (pattern_sel->button, "clicked",
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G_CALLBACK (gimp_pattern_select_widget_clicked),
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pattern_sel);
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g_signal_connect (pattern_sel->button, "destroy",
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G_CALLBACK (gimp_pattern_select_widget_destroy),
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pattern_sel);
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/* Do initial pattern setup */
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if (! pattern_name || ! strlen (pattern_name))
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pattern_sel->pattern_name = gimp_context_get_pattern ();
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else
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pattern_sel->pattern_name = g_strdup (pattern_name);
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gimp_pattern_get_pixels (pattern_sel->pattern_name,
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&pattern_sel->width,
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&pattern_sel->height,
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&pattern_sel->bytes,
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&mask_data_size,
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&pattern_sel->mask_data);
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g_object_set_data (G_OBJECT (hbox), PATTERN_SELECT_DATA_KEY, pattern_sel);
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return hbox;
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}
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/**
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* gimp_pattern_select_widget_close:
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* @widget: A pattern select widget.
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*
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* Closes the popup window associated with @widget.
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*/
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void
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gimp_pattern_select_widget_close (GtkWidget *widget)
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{
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PatternSelect *pattern_sel;
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g_return_if_fail (GTK_IS_WIDGET (widget));
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pattern_sel = g_object_get_data (G_OBJECT (widget), PATTERN_SELECT_DATA_KEY);
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g_return_if_fail (pattern_sel != NULL);
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if (pattern_sel->temp_pattern_callback)
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{
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gimp_pattern_select_destroy (pattern_sel->temp_pattern_callback);
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pattern_sel->temp_pattern_callback = NULL;
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}
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}
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/**
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* gimp_pattern_select_widget_set:
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* @widget: A pattern select widget.
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* @pattern_name: Pattern name to set. NULL means no change.
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*
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* Sets the current pattern for the pattern select widget. Calls the
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* callback function if one was supplied in the call to
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* gimp_pattern_select_widget_new().
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*/
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void
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gimp_pattern_select_widget_set (GtkWidget *widget,
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const gchar *pattern_name)
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{
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PatternSelect *pattern_sel;
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g_return_if_fail (GTK_IS_WIDGET (widget));
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pattern_sel = g_object_get_data (G_OBJECT (widget), PATTERN_SELECT_DATA_KEY);
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g_return_if_fail (pattern_sel != NULL);
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if (pattern_sel->temp_pattern_callback)
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{
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gimp_patterns_set_popup (pattern_sel->temp_pattern_callback,
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pattern_name);
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}
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else
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{
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gint width;
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gint height;
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gint bytes;
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gint mask_data_size;
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guint8 *mask_data;
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gchar *name;
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if (! pattern_name || ! strlen (pattern_name))
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name = gimp_context_get_pattern ();
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else
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name = g_strdup (pattern_name);
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if (gimp_pattern_get_pixels (name,
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&width,
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&height,
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&bytes,
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&mask_data_size,
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&mask_data))
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{
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gimp_pattern_select_widget_callback (name, width, height, bytes,
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mask_data, FALSE, pattern_sel);
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g_free (mask_data);
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}
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g_free (name);
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}
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}
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/* private functions */
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static void
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gimp_pattern_select_widget_callback (const gchar *name,
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gint width,
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gint height,
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gint bytes,
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const guchar *mask_data,
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gboolean closing,
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gpointer data)
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{
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PatternSelect *pattern_sel = (PatternSelect *) data;
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g_free (pattern_sel->pattern_name);
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g_free (pattern_sel->mask_data);
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pattern_sel->pattern_name = g_strdup (name);
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pattern_sel->width = width;
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pattern_sel->height = height;
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pattern_sel->bytes = bytes;
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pattern_sel->mask_data = g_memdup (mask_data, width * height * bytes);
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gimp_pattern_select_preview_update (pattern_sel->preview,
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width, height, bytes, mask_data);
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if (pattern_sel->callback)
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pattern_sel->callback (name, width, height, bytes,
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mask_data, closing, pattern_sel->data);
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if (closing)
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pattern_sel->temp_pattern_callback = NULL;
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}
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static void
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gimp_pattern_select_widget_clicked (GtkWidget *widget,
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PatternSelect *pattern_sel)
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{
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if (pattern_sel->temp_pattern_callback)
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{
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/* calling gimp_patterns_set_popup() raises the dialog */
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gimp_patterns_set_popup (pattern_sel->temp_pattern_callback,
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pattern_sel->pattern_name);
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}
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else
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{
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pattern_sel->temp_pattern_callback =
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gimp_pattern_select_new (pattern_sel->title,
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pattern_sel->pattern_name,
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gimp_pattern_select_widget_callback,
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pattern_sel);
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}
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}
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static void
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gimp_pattern_select_widget_destroy (GtkWidget *widget,
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PatternSelect *pattern_sel)
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{
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if (pattern_sel->temp_pattern_callback)
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{
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gimp_pattern_select_destroy (pattern_sel->temp_pattern_callback);
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pattern_sel->temp_pattern_callback = NULL;
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}
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g_free (pattern_sel->title);
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g_free (pattern_sel->pattern_name);
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g_free (pattern_sel->mask_data);
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g_free (pattern_sel);
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}
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static void
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gimp_pattern_select_preview_resize (PatternSelect *pattern_sel)
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{
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if (pattern_sel->width > 0 && pattern_sel->height > 0)
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gimp_pattern_select_preview_update (pattern_sel->preview,
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pattern_sel->width,
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pattern_sel->height,
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pattern_sel->bytes,
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pattern_sel->mask_data);
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}
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static gboolean
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gimp_pattern_select_preview_events (GtkWidget *widget,
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GdkEvent *event,
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PatternSelect *pattern_sel)
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{
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GdkEventButton *bevent;
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if (pattern_sel->mask_data)
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{
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switch (event->type)
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{
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case GDK_BUTTON_PRESS:
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bevent = (GdkEventButton *) event;
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if (bevent->button == 1)
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{
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gtk_grab_add (widget);
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gimp_pattern_select_popup_open (pattern_sel,
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bevent->x, bevent->y);
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}
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break;
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case GDK_BUTTON_RELEASE:
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bevent = (GdkEventButton *) event;
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if (bevent->button == 1)
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{
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gtk_grab_remove (widget);
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gimp_pattern_select_popup_close (pattern_sel);
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}
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break;
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default:
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break;
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}
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}
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return FALSE;
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}
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static void
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gimp_pattern_select_preview_update (GtkWidget *preview,
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gint width,
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gint height,
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gint bytes,
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const guchar *mask_data)
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{
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GimpImageType type;
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switch (bytes)
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{
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case 1: type = GIMP_GRAY_IMAGE; break;
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case 2: type = GIMP_GRAYA_IMAGE; break;
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case 3: type = GIMP_RGB_IMAGE; break;
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case 4: type = GIMP_RGBA_IMAGE; break;
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default:
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return;
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}
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gimp_preview_area_draw (GIMP_PREVIEW_AREA (preview),
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0, 0, width, height,
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type,
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mask_data,
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width * bytes);
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}
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static void
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gimp_pattern_select_popup_open (PatternSelect *pattern_sel,
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gint x,
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gint y)
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{
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GtkWidget *frame;
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GtkWidget *preview;
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GdkScreen *screen;
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gint x_org;
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gint y_org;
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gint scr_w;
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gint scr_h;
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if (pattern_sel->popup)
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gimp_pattern_select_popup_close (pattern_sel);
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if (pattern_sel->width <= CELL_SIZE && pattern_sel->height <= CELL_SIZE)
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return;
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pattern_sel->popup = gtk_window_new (GTK_WINDOW_POPUP);
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frame = gtk_frame_new (NULL);
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gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_OUT);
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gtk_container_add (GTK_CONTAINER (pattern_sel->popup), frame);
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gtk_widget_show (frame);
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preview = gimp_preview_area_new ();
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gtk_widget_set_size_request (preview,
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pattern_sel->width, pattern_sel->height);
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gtk_container_add (GTK_CONTAINER (frame), preview);
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gtk_widget_show (preview);
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/* decide where to put the popup */
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gdk_window_get_origin (pattern_sel->preview->window, &x_org, &y_org);
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screen = gtk_widget_get_screen (pattern_sel->popup);
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scr_w = gdk_screen_get_width (screen);
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scr_h = gdk_screen_get_height (screen);
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x = x_org + x - (pattern_sel->width / 2);
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y = y_org + y - (pattern_sel->height / 2);
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x = (x < 0) ? 0 : x;
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y = (y < 0) ? 0 : y;
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x = (x + pattern_sel->width > scr_w) ? scr_w - pattern_sel->width : x;
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y = (y + pattern_sel->height > scr_h) ? scr_h - pattern_sel->height : y;
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gtk_window_move (GTK_WINDOW (pattern_sel->popup), x, y);
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gtk_widget_show (pattern_sel->popup);
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/* Draw the pattern */
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gimp_pattern_select_preview_update (preview,
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pattern_sel->width, pattern_sel->height,
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pattern_sel->bytes,
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pattern_sel->mask_data);
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}
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static void
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gimp_pattern_select_popup_close (PatternSelect *pattern_sel)
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{
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if (pattern_sel->popup)
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{
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gtk_widget_destroy (pattern_sel->popup);
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pattern_sel->popup = NULL;
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}
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}
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static void
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gimp_pattern_select_drag_data_received (GtkWidget *preview,
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GdkDragContext *context,
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gint x,
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gint y,
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GtkSelectionData *selection,
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guint info,
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guint time,
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GtkWidget *widget)
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{
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gchar *str;
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if ((selection->format != 8) || (selection->length < 1))
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{
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g_warning ("Received invalid pattern data!");
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return;
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}
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str = g_strndup ((const gchar *) selection->data, selection->length);
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if (g_utf8_validate (str, -1, NULL))
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{
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gint pid;
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gpointer unused;
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gint name_offset = 0;
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if (sscanf (str, "%i:%p:%n", &pid, &unused, &name_offset) >= 2 &&
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pid == gimp_getpid () && name_offset > 0)
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{
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gchar *name = str + name_offset;
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gimp_pattern_select_widget_set (widget, name);
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}
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}
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g_free (str);
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}
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