mirror of https://github.com/GNOME/gimp.git
794 lines
23 KiB
C
794 lines
23 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* gimppreview.c
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* Copyright (C) 2001 Michael Natterer <mitch@gimp.org>
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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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, 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 <gtk/gtk.h>
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#include "libgimpcolor/gimpcolor.h"
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#include "libgimpmath/gimpmath.h"
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#include "libgimpbase/gimpbase.h"
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#include "libgimpwidgets/gimpwidgets.h"
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#include "widgets-types.h"
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#include "core/gimpmarshal.h"
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#include "core/gimpviewable.h"
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#include "gimpdnd.h"
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#include "gimppreview.h"
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#include "gimppreview-popup.h"
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#include "gimppreviewrenderer.h"
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#include "gimppreviewrenderer-utils.h"
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#define PREVIEW_EVENT_MASK (GDK_BUTTON_PRESS_MASK | \
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GDK_BUTTON_RELEASE_MASK | \
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GDK_ENTER_NOTIFY_MASK | \
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GDK_LEAVE_NOTIFY_MASK)
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enum
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{
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CLICKED,
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DOUBLE_CLICKED,
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CONTEXT,
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LAST_SIGNAL
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};
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static void gimp_preview_class_init (GimpPreviewClass *klass);
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static void gimp_preview_init (GimpPreview *preview);
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static void gimp_preview_destroy (GtkObject *object);
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static void gimp_preview_realize (GtkWidget *widget);
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static void gimp_preview_unrealize (GtkWidget *widget);
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static void gimp_preview_map (GtkWidget *widget);
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static void gimp_preview_unmap (GtkWidget *widget);
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static void gimp_preview_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gimp_preview_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gboolean gimp_preview_expose_event (GtkWidget *widget,
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GdkEventExpose *event);
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static gboolean gimp_preview_button_press_event (GtkWidget *widget,
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GdkEventButton *bevent);
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static gboolean gimp_preview_button_release_event (GtkWidget *widget,
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GdkEventButton *bevent);
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static gboolean gimp_preview_enter_notify_event (GtkWidget *widget,
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GdkEventCrossing *event);
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static gboolean gimp_preview_leave_notify_event (GtkWidget *widget,
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GdkEventCrossing *event);
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static void gimp_preview_update_callback (GimpPreviewRenderer *renderer,
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GimpPreview *preview);
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static GimpViewable * gimp_preview_drag_viewable (GtkWidget *widget,
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gpointer data);
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static guint preview_signals[LAST_SIGNAL] = { 0 };
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static GtkWidgetClass *parent_class = NULL;
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GType
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gimp_preview_get_type (void)
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{
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static GType preview_type = 0;
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if (! preview_type)
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{
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static const GTypeInfo preview_info =
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{
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sizeof (GimpPreviewClass),
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NULL, /* base_init */
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NULL, /* base_finalize */
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(GClassInitFunc) gimp_preview_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (GimpPreview),
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0, /* n_preallocs */
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(GInstanceInitFunc) gimp_preview_init,
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};
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preview_type = g_type_register_static (GTK_TYPE_WIDGET,
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"GimpPreview",
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&preview_info, 0);
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}
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return preview_type;
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}
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static void
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gimp_preview_class_init (GimpPreviewClass *klass)
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{
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GtkObjectClass *object_class;
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GtkWidgetClass *widget_class;
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object_class = GTK_OBJECT_CLASS (klass);
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widget_class = GTK_WIDGET_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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preview_signals[CLICKED] =
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g_signal_new ("clicked",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GimpPreviewClass, clicked),
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NULL, NULL,
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gimp_marshal_VOID__FLAGS,
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G_TYPE_NONE, 1,
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GDK_TYPE_MODIFIER_TYPE);
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preview_signals[DOUBLE_CLICKED] =
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g_signal_new ("double_clicked",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GimpPreviewClass, double_clicked),
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NULL, NULL,
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gimp_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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preview_signals[CONTEXT] =
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g_signal_new ("context",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GimpPreviewClass, context),
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NULL, NULL,
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gimp_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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object_class->destroy = gimp_preview_destroy;
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widget_class->activate_signal = preview_signals[CLICKED];
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widget_class->realize = gimp_preview_realize;
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widget_class->unrealize = gimp_preview_unrealize;
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widget_class->map = gimp_preview_map;
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widget_class->unmap = gimp_preview_unmap;
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widget_class->size_request = gimp_preview_size_request;
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widget_class->size_allocate = gimp_preview_size_allocate;
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widget_class->expose_event = gimp_preview_expose_event;
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widget_class->button_press_event = gimp_preview_button_press_event;
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widget_class->button_release_event = gimp_preview_button_release_event;
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widget_class->enter_notify_event = gimp_preview_enter_notify_event;
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widget_class->leave_notify_event = gimp_preview_leave_notify_event;
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klass->clicked = NULL;
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klass->double_clicked = NULL;
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klass->context = NULL;
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}
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static void
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gimp_preview_init (GimpPreview *preview)
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{
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GTK_WIDGET_SET_FLAGS (preview, GTK_NO_WINDOW);
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preview->viewable = NULL;
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preview->renderer = NULL;
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preview->clickable = FALSE;
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preview->eat_button_events = TRUE;
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preview->show_popup = FALSE;
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preview->expand = FALSE;
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preview->in_button = FALSE;
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}
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static void
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gimp_preview_destroy (GtkObject *object)
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{
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GimpPreview *preview;
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preview = GIMP_PREVIEW (object);
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if (preview->viewable)
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gimp_preview_set_viewable (preview, NULL);
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if (preview->renderer)
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{
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g_object_unref (preview->renderer);
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preview->renderer = NULL;
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}
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GTK_OBJECT_CLASS (parent_class)->destroy (object);
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}
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static void
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gimp_preview_realize (GtkWidget *widget)
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{
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GimpPreview *preview;
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GdkWindowAttr attributes;
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gint attributes_mask;
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preview = GIMP_PREVIEW (widget);
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GTK_WIDGET_CLASS (parent_class)->realize (widget);
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.x = widget->allocation.x;
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attributes.y = widget->allocation.y;
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attributes.width = widget->allocation.width;
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attributes.height = widget->allocation.height;
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attributes.wclass = GDK_INPUT_ONLY;
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attributes.event_mask = gtk_widget_get_events (widget);
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attributes.event_mask |= PREVIEW_EVENT_MASK;
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attributes_mask = GDK_WA_X | GDK_WA_Y;
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preview->event_window = gdk_window_new (widget->window,
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&attributes, attributes_mask);
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gdk_window_set_user_data (preview->event_window, preview);
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}
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static void
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gimp_preview_unrealize (GtkWidget *widget)
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{
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GimpPreview *preview = GIMP_PREVIEW (widget);
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if (preview->event_window)
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{
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gdk_window_set_user_data (preview->event_window, NULL);
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gdk_window_destroy (preview->event_window);
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preview->event_window = NULL;
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}
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GTK_WIDGET_CLASS (parent_class)->unrealize (widget);
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}
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static void
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gimp_preview_map (GtkWidget *widget)
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{
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GimpPreview *preview = GIMP_PREVIEW (widget);
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GTK_WIDGET_CLASS (parent_class)->map (widget);
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if (preview->event_window)
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gdk_window_show (preview->event_window);
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}
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static void
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gimp_preview_unmap (GtkWidget *widget)
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{
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GimpPreview *preview = GIMP_PREVIEW (widget);
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if (preview->has_grab)
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gtk_grab_remove (widget);
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if (preview->event_window)
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gdk_window_hide (preview->event_window);
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GTK_WIDGET_CLASS (parent_class)->unmap (widget);
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}
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static void
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gimp_preview_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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GimpPreview *preview;
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preview = GIMP_PREVIEW (widget);
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if (preview->expand)
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{
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requisition->width = 2 * preview->renderer->border_width + 1;
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requisition->height = 2 * preview->renderer->border_width + 1;
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}
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else
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{
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requisition->width = (preview->renderer->width +
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2 * preview->renderer->border_width);
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requisition->height = (preview->renderer->height +
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2 * preview->renderer->border_width);
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}
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if (GTK_WIDGET_CLASS (parent_class)->size_request)
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GTK_WIDGET_CLASS (parent_class)->size_request (widget, requisition);
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}
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static void
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gimp_preview_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GimpPreview *preview;
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gint width;
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gint height;
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preview = GIMP_PREVIEW (widget);
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if (preview->expand)
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{
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width = MIN (GIMP_VIEWABLE_MAX_PREVIEW_SIZE,
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allocation->width - 2 * preview->renderer->border_width);
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height = MIN (GIMP_VIEWABLE_MAX_PREVIEW_SIZE,
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allocation->height - 2 * preview->renderer->border_width);
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if (preview->renderer->width != width ||
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preview->renderer->height != height)
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{
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gint border_width = preview->renderer->border_width;
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if (preview->renderer->size != -1 && preview->renderer->viewable)
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{
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gint preview_width;
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gint preview_height;
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gint scaled_width;
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gint scaled_height;
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gimp_viewable_get_preview_size (preview->renderer->viewable,
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GIMP_VIEWABLE_MAX_PREVIEW_SIZE,
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preview->renderer->is_popup,
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preview->renderer->dot_for_dot,
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&preview_width,
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&preview_height);
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gimp_viewable_calc_preview_size (preview->renderer->viewable,
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preview_width,
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preview_height,
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width, height,
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TRUE, 1.0, 1.0,
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&scaled_width, &scaled_height,
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NULL);
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if (scaled_width > width)
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{
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scaled_height = scaled_height * width / scaled_width;
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scaled_width = scaled_width * width / scaled_width;
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}
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else if (scaled_height > height)
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{
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scaled_width = scaled_width * height / scaled_height;
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scaled_height = scaled_height * height / scaled_height;
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}
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gimp_preview_renderer_set_size (preview->renderer,
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MAX (scaled_width, scaled_height),
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border_width);
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}
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else
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{
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gimp_preview_renderer_set_size_full (preview->renderer,
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width, height,
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border_width);
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}
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gimp_preview_renderer_remove_idle (preview->renderer);
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}
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}
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width = (preview->renderer->width +
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2 * preview->renderer->border_width);
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height = (preview->renderer->height +
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2 * preview->renderer->border_width);
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if (allocation->width > width)
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allocation->x += (allocation->width - width) / 2;
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if (allocation->height > height)
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allocation->y += (allocation->height - height) / 2;
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allocation->width = width;
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allocation->height = height;
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widget->allocation = *allocation;
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if (GTK_WIDGET_REALIZED (widget))
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gdk_window_move_resize (preview->event_window,
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allocation->x,
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allocation->y,
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allocation->width,
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allocation->height);
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}
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static gboolean
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gimp_preview_expose_event (GtkWidget *widget,
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GdkEventExpose *event)
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{
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if (! GTK_WIDGET_DRAWABLE (widget))
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return FALSE;
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gimp_preview_renderer_draw (GIMP_PREVIEW (widget)->renderer,
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widget->window, widget,
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&widget->allocation,
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&event->area);
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return FALSE;
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}
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#define DEBUG_MEMSIZE 1
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#ifdef DEBUG_MEMSIZE
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extern gboolean gimp_debug_memsize;
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#endif
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static gboolean
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gimp_preview_button_press_event (GtkWidget *widget,
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GdkEventButton *bevent)
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{
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GimpPreview *preview;
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preview = GIMP_PREVIEW (widget);
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#ifdef DEBUG_MEMSIZE
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if (bevent->type == GDK_BUTTON_PRESS && bevent->button == 2)
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{
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gimp_debug_memsize = TRUE;
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gimp_object_get_memsize (GIMP_OBJECT (preview->viewable), NULL);
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gimp_debug_memsize = FALSE;
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}
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#endif /* DEBUG_MEMSIZE */
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if (! preview->clickable &&
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! preview->show_popup)
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return FALSE;
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if (! GTK_WIDGET_REALIZED (widget))
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return FALSE;
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if (bevent->type == GDK_BUTTON_PRESS)
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{
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if (bevent->button == 1)
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{
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gtk_grab_add (widget);
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preview->has_grab = TRUE;
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preview->press_state = bevent->state;
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if (preview->show_popup)
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{
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bevent->x += widget->allocation.x;
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bevent->y += widget->allocation.y;
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gimp_preview_popup_show (widget, bevent,
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preview->viewable,
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preview->renderer->width,
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preview->renderer->height,
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preview->renderer->dot_for_dot);
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}
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}
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else
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{
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preview->press_state = 0;
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if (bevent->button == 3)
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g_signal_emit (widget, preview_signals[CONTEXT], 0);
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else
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return FALSE;
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}
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}
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else if (bevent->type == GDK_2BUTTON_PRESS)
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{
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if (bevent->button == 1)
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g_signal_emit (widget, preview_signals[DOUBLE_CLICKED], 0);
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}
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return preview->eat_button_events ? TRUE : FALSE;
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}
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static gboolean
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gimp_preview_button_release_event (GtkWidget *widget,
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GdkEventButton *bevent)
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{
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GimpPreview *preview;
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preview = GIMP_PREVIEW (widget);
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if (! preview->clickable &&
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! preview->show_popup)
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return FALSE;
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if (bevent->button == 1)
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{
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gtk_grab_remove (widget);
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preview->has_grab = FALSE;
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if (preview->clickable && preview->in_button)
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{
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g_signal_emit (widget, preview_signals[CLICKED], 0,
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preview->press_state);
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}
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}
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else
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{
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return FALSE;
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}
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return preview->eat_button_events ? TRUE : FALSE;
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}
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static gboolean
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gimp_preview_enter_notify_event (GtkWidget *widget,
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GdkEventCrossing *event)
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{
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GimpPreview *preview;
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GtkWidget *event_widget;
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preview = GIMP_PREVIEW (widget);
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event_widget = gtk_get_event_widget ((GdkEvent *) event);
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if ((event_widget == widget) &&
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(event->detail != GDK_NOTIFY_INFERIOR))
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{
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preview->in_button = TRUE;
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}
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return FALSE;
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}
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static gboolean
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gimp_preview_leave_notify_event (GtkWidget *widget,
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GdkEventCrossing *event)
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{
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GimpPreview *preview;
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GtkWidget *event_widget;
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preview = GIMP_PREVIEW (widget);
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event_widget = gtk_get_event_widget ((GdkEvent *) event);
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if ((event_widget == widget) &&
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|
(event->detail != GDK_NOTIFY_INFERIOR))
|
|
{
|
|
preview->in_button = FALSE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/* public functions */
|
|
|
|
GtkWidget *
|
|
gimp_preview_new (GimpViewable *viewable,
|
|
gint size,
|
|
gint border_width,
|
|
gboolean is_popup)
|
|
{
|
|
GtkWidget *preview;
|
|
|
|
g_return_val_if_fail (GIMP_IS_VIEWABLE (viewable), NULL);
|
|
|
|
preview = gimp_preview_new_by_types (GIMP_TYPE_PREVIEW,
|
|
G_TYPE_FROM_INSTANCE (viewable),
|
|
size, border_width, is_popup);
|
|
|
|
if (preview)
|
|
gimp_preview_set_viewable (GIMP_PREVIEW (preview), viewable);
|
|
|
|
gimp_preview_renderer_remove_idle (GIMP_PREVIEW (preview)->renderer);
|
|
|
|
return preview;
|
|
}
|
|
|
|
GtkWidget *
|
|
gimp_preview_new_full (GimpViewable *viewable,
|
|
gint width,
|
|
gint height,
|
|
gint border_width,
|
|
gboolean is_popup,
|
|
gboolean clickable,
|
|
gboolean show_popup)
|
|
{
|
|
GtkWidget *preview;
|
|
|
|
g_return_val_if_fail (GIMP_IS_VIEWABLE (viewable), NULL);
|
|
|
|
preview = gimp_preview_new_full_by_types (GIMP_TYPE_PREVIEW,
|
|
G_TYPE_FROM_INSTANCE (viewable),
|
|
width, height, border_width,
|
|
is_popup, clickable, show_popup);
|
|
|
|
if (preview)
|
|
gimp_preview_set_viewable (GIMP_PREVIEW (preview), viewable);
|
|
|
|
gimp_preview_renderer_remove_idle (GIMP_PREVIEW (preview)->renderer);
|
|
|
|
return preview;
|
|
}
|
|
|
|
GtkWidget *
|
|
gimp_preview_new_by_types (GType preview_type,
|
|
GType viewable_type,
|
|
gint size,
|
|
gint border_width,
|
|
gboolean is_popup)
|
|
{
|
|
GimpPreviewRenderer *renderer;
|
|
GimpPreview *preview;
|
|
|
|
g_return_val_if_fail (g_type_is_a (preview_type, GIMP_TYPE_PREVIEW), NULL);
|
|
g_return_val_if_fail (g_type_is_a (viewable_type, GIMP_TYPE_VIEWABLE), NULL);
|
|
g_return_val_if_fail (size > 0 &&
|
|
size <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE, NULL);
|
|
g_return_val_if_fail (border_width >= 0 &&
|
|
border_width <= GIMP_PREVIEW_MAX_BORDER_WIDTH, NULL);
|
|
|
|
renderer = gimp_preview_renderer_new (viewable_type, size,
|
|
border_width, is_popup);
|
|
|
|
g_return_val_if_fail (renderer != NULL, NULL);
|
|
|
|
preview = g_object_new (preview_type, NULL);
|
|
|
|
g_signal_connect (renderer, "update",
|
|
G_CALLBACK (gimp_preview_update_callback),
|
|
preview);
|
|
|
|
preview->renderer = renderer;
|
|
|
|
return GTK_WIDGET (preview);
|
|
}
|
|
|
|
GtkWidget *
|
|
gimp_preview_new_full_by_types (GType preview_type,
|
|
GType viewable_type,
|
|
gint width,
|
|
gint height,
|
|
gint border_width,
|
|
gboolean is_popup,
|
|
gboolean clickable,
|
|
gboolean show_popup)
|
|
{
|
|
GimpPreviewRenderer *renderer;
|
|
GimpPreview *preview;
|
|
|
|
g_return_val_if_fail (g_type_is_a (preview_type, GIMP_TYPE_PREVIEW), NULL);
|
|
g_return_val_if_fail (g_type_is_a (viewable_type, GIMP_TYPE_VIEWABLE), NULL);
|
|
g_return_val_if_fail (width > 0 &&
|
|
width <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE, NULL);
|
|
g_return_val_if_fail (height > 0 &&
|
|
height <= GIMP_VIEWABLE_MAX_PREVIEW_SIZE, NULL);
|
|
g_return_val_if_fail (border_width >= 0 &&
|
|
border_width <= GIMP_PREVIEW_MAX_BORDER_WIDTH, NULL);
|
|
|
|
renderer = gimp_preview_renderer_new_full (viewable_type, width, height,
|
|
border_width, is_popup);
|
|
|
|
g_return_val_if_fail (renderer != NULL, NULL);
|
|
|
|
preview = g_object_new (preview_type, NULL);
|
|
|
|
g_signal_connect (renderer, "update",
|
|
G_CALLBACK (gimp_preview_update_callback),
|
|
preview);
|
|
|
|
preview->renderer = renderer;
|
|
preview->clickable = clickable ? TRUE : FALSE;
|
|
preview->show_popup = show_popup ? TRUE : FALSE;
|
|
|
|
return GTK_WIDGET (preview);
|
|
}
|
|
|
|
void
|
|
gimp_preview_set_viewable (GimpPreview *preview,
|
|
GimpViewable *viewable)
|
|
{
|
|
GType viewable_type = G_TYPE_NONE;
|
|
|
|
g_return_if_fail (GIMP_IS_PREVIEW (preview));
|
|
g_return_if_fail (viewable == NULL || GIMP_IS_VIEWABLE (viewable));
|
|
|
|
if (viewable)
|
|
{
|
|
viewable_type = G_TYPE_FROM_INSTANCE (viewable);
|
|
|
|
g_return_if_fail (g_type_is_a (G_TYPE_FROM_INSTANCE (preview->renderer),
|
|
gimp_preview_renderer_type_from_viewable_type (viewable_type)));
|
|
}
|
|
|
|
if (viewable == preview->viewable)
|
|
return;
|
|
|
|
if (preview->viewable)
|
|
{
|
|
g_object_remove_weak_pointer (G_OBJECT (preview->viewable),
|
|
(gpointer *) &preview->viewable);
|
|
|
|
if (! viewable && ! preview->renderer->is_popup)
|
|
{
|
|
if (gimp_dnd_viewable_source_unset (GTK_WIDGET (preview),
|
|
G_TYPE_FROM_INSTANCE (preview->viewable)))
|
|
{
|
|
gtk_drag_source_unset (GTK_WIDGET (preview));
|
|
}
|
|
}
|
|
}
|
|
else if (viewable && ! preview->renderer->is_popup)
|
|
{
|
|
if (gimp_dnd_drag_source_set_by_type (GTK_WIDGET (preview),
|
|
GDK_BUTTON1_MASK | GDK_BUTTON2_MASK,
|
|
viewable_type,
|
|
GDK_ACTION_COPY))
|
|
{
|
|
gimp_dnd_viewable_source_set (GTK_WIDGET (preview),
|
|
viewable_type,
|
|
gimp_preview_drag_viewable,
|
|
NULL);
|
|
}
|
|
}
|
|
|
|
gimp_preview_renderer_set_viewable (preview->renderer, viewable);
|
|
preview->viewable = viewable;
|
|
|
|
if (preview->viewable)
|
|
{
|
|
g_object_add_weak_pointer (G_OBJECT (preview->viewable),
|
|
(gpointer *) &preview->viewable);
|
|
}
|
|
}
|
|
|
|
void
|
|
gimp_preview_set_expand (GimpPreview *preview,
|
|
gboolean expand)
|
|
{
|
|
g_return_if_fail (GIMP_IS_PREVIEW (preview));
|
|
|
|
if (preview->expand != expand)
|
|
{
|
|
preview->expand = expand ? TRUE : FALSE;
|
|
gtk_widget_queue_resize (GTK_WIDGET (preview));
|
|
}
|
|
}
|
|
|
|
|
|
/* private functions */
|
|
|
|
static void
|
|
gimp_preview_update_callback (GimpPreviewRenderer *renderer,
|
|
GimpPreview *preview)
|
|
{
|
|
GtkWidget *widget;
|
|
gint width;
|
|
gint height;
|
|
|
|
widget = GTK_WIDGET (preview);
|
|
|
|
width = renderer->width + 2 * renderer->border_width;
|
|
height = renderer->height + 2 * renderer->border_width;
|
|
|
|
if (width != widget->requisition.width ||
|
|
height != widget->requisition.height)
|
|
{
|
|
widget->requisition.width = width;
|
|
widget->requisition.height = height;
|
|
|
|
gtk_widget_queue_resize (widget);
|
|
}
|
|
else
|
|
{
|
|
gtk_widget_queue_draw (widget);
|
|
}
|
|
}
|
|
|
|
static GimpViewable *
|
|
gimp_preview_drag_viewable (GtkWidget *widget,
|
|
gpointer data)
|
|
{
|
|
return GIMP_PREVIEW (widget)->viewable;
|
|
}
|