mirror of https://github.com/GNOME/gimp.git
536 lines
16 KiB
C
536 lines
16 KiB
C
/* GIMP - The GNU Image Manipulation Program
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* Copyright (C) 1995 Spencer Kimball and Peter Mattis
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*
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* GimpOverlayBox
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* Copyright (C) 2009 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 3 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, see <https://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "widgets-types.h"
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#include "gimpoverlaybox.h"
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#include "gimpoverlaychild.h"
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/* local function prototypes */
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static void gimp_overlay_box_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec);
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static void gimp_overlay_box_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec);
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static void gimp_overlay_box_realize (GtkWidget *widget);
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static void gimp_overlay_box_unrealize (GtkWidget *widget);
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static void gimp_overlay_box_get_preferred_width (GtkWidget *widget,
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gint *minimum_width,
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gint *natural_width);
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static void gimp_overlay_box_get_preferred_height(GtkWidget *widget,
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gint *minimum_height,
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gint *natural_height);
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static void gimp_overlay_box_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gboolean gimp_overlay_box_draw (GtkWidget *widget,
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cairo_t *cr);
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static gboolean gimp_overlay_box_damage (GtkWidget *widget,
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GdkEventExpose *event);
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static void gimp_overlay_box_add (GtkContainer *container,
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GtkWidget *widget);
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static void gimp_overlay_box_remove (GtkContainer *container,
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GtkWidget *widget);
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static void gimp_overlay_box_forall (GtkContainer *container,
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gboolean include_internals,
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GtkCallback callback,
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gpointer callback_data);
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static GType gimp_overlay_box_child_type (GtkContainer *container);
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static GdkWindow * gimp_overlay_box_pick_embedded_child (GdkWindow *window,
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gdouble x,
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gdouble y,
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GimpOverlayBox *box);
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G_DEFINE_TYPE (GimpOverlayBox, gimp_overlay_box, GTK_TYPE_CONTAINER)
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#define parent_class gimp_overlay_box_parent_class
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static void
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gimp_overlay_box_class_init (GimpOverlayBoxClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
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GtkContainerClass *container_class = GTK_CONTAINER_CLASS (klass);
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object_class->set_property = gimp_overlay_box_set_property;
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object_class->get_property = gimp_overlay_box_get_property;
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widget_class->realize = gimp_overlay_box_realize;
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widget_class->unrealize = gimp_overlay_box_unrealize;
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widget_class->get_preferred_width = gimp_overlay_box_get_preferred_width;
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widget_class->get_preferred_height = gimp_overlay_box_get_preferred_height;
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widget_class->size_allocate = gimp_overlay_box_size_allocate;
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widget_class->draw = gimp_overlay_box_draw;
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g_signal_override_class_handler ("damage-event",
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GIMP_TYPE_OVERLAY_BOX,
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G_CALLBACK (gimp_overlay_box_damage));
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container_class->add = gimp_overlay_box_add;
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container_class->remove = gimp_overlay_box_remove;
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container_class->forall = gimp_overlay_box_forall;
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container_class->child_type = gimp_overlay_box_child_type;
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}
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static void
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gimp_overlay_box_init (GimpOverlayBox *box)
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{
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gtk_widget_set_has_window (GTK_WIDGET (box), TRUE);
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}
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static void
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gimp_overlay_box_set_property (GObject *object,
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guint property_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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switch (property_id)
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{
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_overlay_box_get_property (GObject *object,
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guint property_id,
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GValue *value,
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GParamSpec *pspec)
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{
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switch (property_id)
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{
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static void
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gimp_overlay_box_realize (GtkWidget *widget)
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{
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GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
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GtkAllocation allocation;
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GdkWindowAttr attributes;
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gint attributes_mask;
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GList *list;
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gtk_widget_set_realized (widget, TRUE);
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gtk_widget_get_allocation (widget, &allocation);
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attributes.x = allocation.x;
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attributes.y = allocation.y;
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attributes.width = allocation.width;
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attributes.height = allocation.height;
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attributes.window_type = GDK_WINDOW_CHILD;
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attributes.wclass = GDK_INPUT_OUTPUT;
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attributes.visual = gtk_widget_get_visual (widget);
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attributes.event_mask = gtk_widget_get_events (widget);
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attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL;
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gtk_widget_set_window (widget,
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gdk_window_new (gtk_widget_get_parent_window (widget),
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&attributes, attributes_mask));
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gdk_window_set_user_data (gtk_widget_get_window (widget), widget);
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g_signal_connect (gtk_widget_get_window (widget), "pick-embedded-child",
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G_CALLBACK (gimp_overlay_box_pick_embedded_child),
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widget);
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for (list = box->children; list; list = g_list_next (list))
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gimp_overlay_child_realize (box, list->data);
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}
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static void
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gimp_overlay_box_unrealize (GtkWidget *widget)
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{
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GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
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GList *list;
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for (list = box->children; list; list = g_list_next (list))
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gimp_overlay_child_unrealize (box, list->data);
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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_overlay_box_get_preferred_width (GtkWidget *widget,
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gint *minimum_width,
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gint *natural_width)
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{
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GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
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GList *list;
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*minimum_width = *natural_width = 0;
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for (list = box->children; list; list = g_list_next (list))
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{
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gint minimum;
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gint natural;
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gimp_overlay_child_get_preferred_width (box, list->data,
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&minimum, &natural);
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*minimum_width = MAX (*minimum_width, minimum);
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*natural_width = MAX (*natural_width, natural);
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}
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*minimum_width = 0;
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*minimum_width +=
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2 * gtk_container_get_border_width (GTK_CONTAINER (widget)) + 1;
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*natural_width +=
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2 * gtk_container_get_border_width (GTK_CONTAINER (widget)) + 1;
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}
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static void
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gimp_overlay_box_get_preferred_height (GtkWidget *widget,
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gint *minimum_height,
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gint *natural_height)
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{
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GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
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GList *list;
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*minimum_height = *natural_height = 0;
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for (list = box->children; list; list = g_list_next (list))
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{
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gint minimum;
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gint natural;
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gimp_overlay_child_get_preferred_height (box, list->data,
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&minimum, &natural);
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*minimum_height = MAX (*minimum_height, minimum);
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*natural_height = MAX (*natural_height, natural);
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}
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*minimum_height = 0;
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*minimum_height +=
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2 * gtk_container_get_border_width (GTK_CONTAINER (widget)) + 1;
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*natural_height +=
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2 * gtk_container_get_border_width (GTK_CONTAINER (widget)) + 1;
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}
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static void
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gimp_overlay_box_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
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GList *list;
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GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
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for (list = box->children; list; list = g_list_next (list))
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gimp_overlay_child_size_allocate (box, list->data);
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}
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static gboolean
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gimp_overlay_box_draw (GtkWidget *widget,
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cairo_t *cr)
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{
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GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
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GList *list;
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for (list = box->children; list; list = g_list_next (list))
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{
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if (gimp_overlay_child_draw (box, list->data, cr))
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return FALSE;
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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_overlay_box_damage (GtkWidget *widget,
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GdkEventExpose *event)
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{
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GimpOverlayBox *box = GIMP_OVERLAY_BOX (widget);
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GList *list;
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for (list = box->children; list; list = g_list_next (list))
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{
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if (gimp_overlay_child_damage (box, list->data, event))
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return FALSE;
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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_overlay_box_add (GtkContainer *container,
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GtkWidget *widget)
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{
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gimp_overlay_box_add_child (GIMP_OVERLAY_BOX (container), widget, 0.5, 0.5);
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}
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static void
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gimp_overlay_box_remove (GtkContainer *container,
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GtkWidget *widget)
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{
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GimpOverlayBox *box = GIMP_OVERLAY_BOX (container);
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GimpOverlayChild *child = gimp_overlay_child_find (box, widget);
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if (child)
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{
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if (gtk_widget_get_visible (widget))
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gimp_overlay_child_invalidate (box, child);
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box->children = g_list_remove (box->children, child);
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gimp_overlay_child_free (box, child);
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}
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}
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static void
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gimp_overlay_box_forall (GtkContainer *container,
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gboolean include_internals,
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GtkCallback callback,
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gpointer callback_data)
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{
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GimpOverlayBox *box = GIMP_OVERLAY_BOX (container);
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GList *list;
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list = box->children;
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while (list)
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{
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GimpOverlayChild *child = list->data;
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list = list->next;
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(* callback) (child->widget, callback_data);
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}
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}
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static GType
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gimp_overlay_box_child_type (GtkContainer *container)
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{
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return GTK_TYPE_WIDGET;
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}
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static GdkWindow *
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gimp_overlay_box_pick_embedded_child (GdkWindow *parent,
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gdouble parent_x,
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gdouble parent_y,
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GimpOverlayBox *box)
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{
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GList *list;
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for (list = box->children; list; list = g_list_next (list))
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{
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GimpOverlayChild *child = list->data;
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if (gimp_overlay_child_pick (box, child, parent_x, parent_y))
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return child->window;
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}
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return NULL;
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}
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/* public functions */
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/**
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* gimp_overlay_box_new:
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*
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* Creates a new #GimpOverlayBox widget.
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*
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* Returns: a new #GimpOverlayBox widget
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**/
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GtkWidget *
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gimp_overlay_box_new (void)
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{
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return g_object_new (GIMP_TYPE_OVERLAY_BOX, NULL);
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}
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void
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gimp_overlay_box_add_child (GimpOverlayBox *box,
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GtkWidget *widget,
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gdouble xalign,
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gdouble yalign)
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{
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GimpOverlayChild *child;
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g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
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g_return_if_fail (GTK_IS_WIDGET (widget));
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child = gimp_overlay_child_new (box, widget, xalign, yalign, 0.0, 0.85);
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box->children = g_list_append (box->children, child);
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}
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void
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gimp_overlay_box_set_child_alignment (GimpOverlayBox *box,
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GtkWidget *widget,
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gdouble xalign,
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gdouble yalign)
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{
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GimpOverlayChild *child = gimp_overlay_child_find (box, widget);
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if (child)
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{
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xalign = CLAMP (xalign, 0.0, 1.0);
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yalign = CLAMP (yalign, 0.0, 1.0);
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if (child->has_position ||
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child->xalign != xalign ||
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child->yalign != yalign)
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{
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gimp_overlay_child_invalidate (box, child);
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child->has_position = FALSE;
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child->xalign = xalign;
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child->yalign = yalign;
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gtk_widget_queue_resize (widget);
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}
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}
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}
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void
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gimp_overlay_box_set_child_position (GimpOverlayBox *box,
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GtkWidget *widget,
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gdouble x,
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gdouble y)
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{
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GimpOverlayChild *child = gimp_overlay_child_find (box, widget);
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if (child)
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{
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if (! child->has_position ||
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child->x != x ||
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child->y != y)
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{
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gimp_overlay_child_invalidate (box, child);
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child->has_position = TRUE;
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child->x = x;
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child->y = y;
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gtk_widget_queue_resize (widget);
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}
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}
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}
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void
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gimp_overlay_box_set_child_angle (GimpOverlayBox *box,
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GtkWidget *widget,
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gdouble angle)
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{
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GimpOverlayChild *child = gimp_overlay_child_find (box, widget);
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if (child)
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{
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if (child->angle != angle)
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{
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gimp_overlay_child_invalidate (box, child);
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child->angle = angle;
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gtk_widget_queue_draw (widget);
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}
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}
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}
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void
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gimp_overlay_box_set_child_opacity (GimpOverlayBox *box,
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GtkWidget *widget,
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gdouble opacity)
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{
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GimpOverlayChild *child = gimp_overlay_child_find (box, widget);
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if (child)
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{
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opacity = CLAMP (opacity, 0.0, 1.0);
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if (child->opacity != opacity)
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{
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child->opacity = opacity;
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gtk_widget_queue_draw (widget);
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}
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}
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}
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/**
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* gimp_overlay_box_scroll:
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* @box: the #GimpOverlayBox widget to scroll.
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* @offset_x: the x scroll amount.
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* @offset_y: the y scroll amount.
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*
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* Scrolls the box using gdk_window_scroll(), taking care of properly
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* handling overlay children.
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**/
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void
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gimp_overlay_box_scroll (GimpOverlayBox *box,
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gint offset_x,
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gint offset_y)
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{
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GtkWidget *widget;
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GdkWindow *window;
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GList *list;
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g_return_if_fail (GIMP_IS_OVERLAY_BOX (box));
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widget = GTK_WIDGET (box);
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/* bug 761118 */
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if (! gtk_widget_get_realized (widget))
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return;
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window = gtk_widget_get_window (widget);
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/* Undraw all overlays */
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for (list = box->children; list; list = g_list_next (list))
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{
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GimpOverlayChild *child = list->data;
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gimp_overlay_child_invalidate (box, child);
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}
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gdk_window_scroll (window, offset_x, offset_y);
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/* Re-draw all overlays */
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for (list = box->children; list; list = g_list_next (list))
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{
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GimpOverlayChild *child = list->data;
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gimp_overlay_child_invalidate (box, child);
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}
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}
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