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-rw-r--r--libgnomecanvas/gnome-canvas-widget.c599
1 files changed, 599 insertions, 0 deletions
diff --git a/libgnomecanvas/gnome-canvas-widget.c b/libgnomecanvas/gnome-canvas-widget.c
new file mode 100644
index 0000000000..d94942c8a5
--- /dev/null
+++ b/libgnomecanvas/gnome-canvas-widget.c
@@ -0,0 +1,599 @@
+/*
+ * Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation
+ * All rights reserved.
+ *
+ * This file is part of the Gnome Library.
+ *
+ * The Gnome Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The Gnome Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with the Gnome Library; see the file COPYING.LIB. If not,
+ * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+/*
+ @NOTATION@
+ */
+/* Widget item type for GnomeCanvas widget
+ *
+ * GnomeCanvas is basically a port of the Tk toolkit's most excellent canvas widget. Tk is
+ * copyrighted by the Regents of the University of California, Sun Microsystems, and other parties.
+ *
+ *
+ * Author: Federico Mena <federico@nuclecu.unam.mx>
+ */
+
+#include <config.h>
+#include <math.h>
+#include <gtk/gtksignal.h>
+#include "gnome-canvas-widget.h"
+
+enum {
+ PROP_0,
+ PROP_WIDGET,
+ PROP_X,
+ PROP_Y,
+ PROP_WIDTH,
+ PROP_HEIGHT,
+ PROP_ANCHOR,
+ PROP_SIZE_PIXELS
+};
+
+
+static void gnome_canvas_widget_class_init (GnomeCanvasWidgetClass *class);
+static void gnome_canvas_widget_init (GnomeCanvasWidget *witem);
+static void gnome_canvas_widget_destroy (GtkObject *object);
+static void gnome_canvas_widget_get_property (GObject *object,
+ guint param_id,
+ GValue *value,
+ GParamSpec *pspec);
+static void gnome_canvas_widget_set_property (GObject *object,
+ guint param_id,
+ const GValue *value,
+ GParamSpec *pspec);
+
+static void gnome_canvas_widget_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags);
+static double gnome_canvas_widget_point (GnomeCanvasItem *item, double x, double y,
+ int cx, int cy, GnomeCanvasItem **actual_item);
+static void gnome_canvas_widget_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2);
+
+static void gnome_canvas_widget_render (GnomeCanvasItem *item,
+ GnomeCanvasBuf *buf);
+static void gnome_canvas_widget_draw (GnomeCanvasItem *item,
+ GdkDrawable *drawable,
+ int x, int y,
+ int width, int height);
+
+static GnomeCanvasItemClass *parent_class;
+
+
+GType
+gnome_canvas_widget_get_type (void)
+{
+ static GType widget_type;
+
+ if (!widget_type) {
+ const GTypeInfo object_info = {
+ sizeof (GnomeCanvasWidgetClass),
+ (GBaseInitFunc) NULL,
+ (GBaseFinalizeFunc) NULL,
+ (GClassInitFunc) gnome_canvas_widget_class_init,
+ (GClassFinalizeFunc) NULL,
+ NULL, /* class_data */
+ sizeof (GnomeCanvasWidget),
+ 0, /* n_preallocs */
+ (GInstanceInitFunc) gnome_canvas_widget_init,
+ NULL /* value_table */
+ };
+
+ widget_type = g_type_register_static (GNOME_TYPE_CANVAS_ITEM, "GnomeCanvasWidget",
+ &object_info, 0);
+ }
+
+ return widget_type;
+}
+
+static void
+gnome_canvas_widget_class_init (GnomeCanvasWidgetClass *class)
+{
+ GObjectClass *gobject_class;
+ GtkObjectClass *object_class;
+ GnomeCanvasItemClass *item_class;
+
+ gobject_class = (GObjectClass *) class;
+ object_class = (GtkObjectClass *) class;
+ item_class = (GnomeCanvasItemClass *) class;
+
+ parent_class = g_type_class_peek_parent (class);
+
+ gobject_class->set_property = gnome_canvas_widget_set_property;
+ gobject_class->get_property = gnome_canvas_widget_get_property;
+
+ g_object_class_install_property
+ (gobject_class,
+ PROP_WIDGET,
+ g_param_spec_object ("widget", NULL, NULL,
+ GTK_TYPE_WIDGET,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+ g_object_class_install_property
+ (gobject_class,
+ PROP_X,
+ g_param_spec_double ("x", NULL, NULL,
+ -G_MAXDOUBLE, G_MAXDOUBLE, 0.0,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+ g_object_class_install_property
+ (gobject_class,
+ PROP_Y,
+ g_param_spec_double ("y", NULL, NULL,
+ -G_MAXDOUBLE, G_MAXDOUBLE, 0.0,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+ g_object_class_install_property
+ (gobject_class,
+ PROP_WIDTH,
+ g_param_spec_double ("width", NULL, NULL,
+ -G_MAXDOUBLE, G_MAXDOUBLE, 0.0,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+ g_object_class_install_property
+ (gobject_class,
+ PROP_HEIGHT,
+ g_param_spec_double ("height", NULL, NULL,
+ -G_MAXDOUBLE, G_MAXDOUBLE, 0.0,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+ g_object_class_install_property
+ (gobject_class,
+ PROP_ANCHOR,
+ g_param_spec_enum ("anchor", NULL, NULL,
+ GTK_TYPE_ANCHOR_TYPE,
+ GTK_ANCHOR_NW,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+ g_object_class_install_property
+ (gobject_class,
+ PROP_SIZE_PIXELS,
+ g_param_spec_boolean ("size_pixels", NULL, NULL,
+ FALSE,
+ (G_PARAM_READABLE | G_PARAM_WRITABLE)));
+
+ object_class->destroy = gnome_canvas_widget_destroy;
+
+ item_class->update = gnome_canvas_widget_update;
+ item_class->point = gnome_canvas_widget_point;
+ item_class->bounds = gnome_canvas_widget_bounds;
+ item_class->render = gnome_canvas_widget_render;
+ item_class->draw = gnome_canvas_widget_draw;
+}
+
+static void
+gnome_canvas_widget_init (GnomeCanvasWidget *witem)
+{
+ witem->x = 0.0;
+ witem->y = 0.0;
+ witem->width = 0.0;
+ witem->height = 0.0;
+ witem->anchor = GTK_ANCHOR_NW;
+ witem->size_pixels = FALSE;
+}
+
+static void
+gnome_canvas_widget_destroy (GtkObject *object)
+{
+ GnomeCanvasWidget *witem;
+
+ g_return_if_fail (object != NULL);
+ g_return_if_fail (GNOME_IS_CANVAS_WIDGET (object));
+
+ witem = GNOME_CANVAS_WIDGET (object);
+
+ if (witem->widget && !witem->in_destroy) {
+ g_signal_handler_disconnect (witem->widget, witem->destroy_id);
+ gtk_widget_destroy (witem->widget);
+ witem->widget = NULL;
+ }
+
+ if (GTK_OBJECT_CLASS (parent_class)->destroy)
+ (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
+}
+
+static void
+recalc_bounds (GnomeCanvasWidget *witem)
+{
+ GnomeCanvasItem *item;
+ double wx, wy;
+
+ item = GNOME_CANVAS_ITEM (witem);
+
+ /* Get world coordinates */
+
+ wx = witem->x;
+ wy = witem->y;
+ gnome_canvas_item_i2w (item, &wx, &wy);
+
+ /* Get canvas pixel coordinates */
+
+ gnome_canvas_w2c (item->canvas, wx, wy, &witem->cx, &witem->cy);
+
+ /* Anchor widget item */
+
+ switch (witem->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_SW:
+ break;
+
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_S:
+ witem->cx -= witem->cwidth / 2;
+ break;
+
+ case GTK_ANCHOR_NE:
+ case GTK_ANCHOR_E:
+ case GTK_ANCHOR_SE:
+ witem->cx -= witem->cwidth;
+ break;
+
+ default:
+ break;
+ }
+
+ switch (witem->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_NE:
+ break;
+
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_E:
+ witem->cy -= witem->cheight / 2;
+ break;
+
+ case GTK_ANCHOR_SW:
+ case GTK_ANCHOR_S:
+ case GTK_ANCHOR_SE:
+ witem->cy -= witem->cheight;
+ break;
+
+ default:
+ break;
+ }
+
+ /* Bounds */
+
+ item->x1 = witem->cx;
+ item->y1 = witem->cy;
+ item->x2 = witem->cx + witem->cwidth;
+ item->y2 = witem->cy + witem->cheight;
+
+ if (witem->widget)
+ gtk_layout_move (GTK_LAYOUT (item->canvas), witem->widget,
+ witem->cx + item->canvas->zoom_xofs,
+ witem->cy + item->canvas->zoom_yofs);
+}
+
+static void
+do_destroy (GtkObject *object, gpointer data)
+{
+ GnomeCanvasWidget *witem;
+
+ witem = data;
+
+ witem->in_destroy = TRUE;
+
+ gtk_object_destroy (data);
+}
+
+static void
+gnome_canvas_widget_set_property (GObject *object,
+ guint param_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GnomeCanvasItem *item;
+ GnomeCanvasWidget *witem;
+ GObject *obj;
+ int update;
+ int calc_bounds;
+
+ g_return_if_fail (object != NULL);
+ g_return_if_fail (GNOME_IS_CANVAS_WIDGET (object));
+
+ item = GNOME_CANVAS_ITEM (object);
+ witem = GNOME_CANVAS_WIDGET (object);
+
+ update = FALSE;
+ calc_bounds = FALSE;
+
+ switch (param_id) {
+ case PROP_WIDGET:
+ if (witem->widget) {
+ g_signal_handler_disconnect (witem->widget, witem->destroy_id);
+ gtk_container_remove (GTK_CONTAINER (item->canvas), witem->widget);
+ }
+
+ obj = g_value_get_object (value);
+ if (obj) {
+ witem->widget = GTK_WIDGET (obj);
+ witem->destroy_id = g_signal_connect (obj, "destroy",
+ G_CALLBACK (do_destroy),
+ witem);
+ gtk_layout_put (GTK_LAYOUT (item->canvas), witem->widget,
+ witem->cx + item->canvas->zoom_xofs,
+ witem->cy + item->canvas->zoom_yofs);
+ }
+
+ update = TRUE;
+ break;
+
+ case PROP_X:
+ if (witem->x != g_value_get_double (value))
+ {
+ witem->x = g_value_get_double (value);
+ calc_bounds = TRUE;
+ }
+ break;
+
+ case PROP_Y:
+ if (witem->y != g_value_get_double (value))
+ {
+ witem->y = g_value_get_double (value);
+ calc_bounds = TRUE;
+ }
+ break;
+
+ case PROP_WIDTH:
+ if (witem->width != fabs (g_value_get_double (value)))
+ {
+ witem->width = fabs (g_value_get_double (value));
+ update = TRUE;
+ }
+ break;
+
+ case PROP_HEIGHT:
+ if (witem->height != fabs (g_value_get_double (value)))
+ {
+ witem->height = fabs (g_value_get_double (value));
+ update = TRUE;
+ }
+ break;
+
+ case PROP_ANCHOR:
+ if (witem->anchor != g_value_get_enum (value))
+ {
+ witem->anchor = g_value_get_enum (value);
+ update = TRUE;
+ }
+ break;
+
+ case PROP_SIZE_PIXELS:
+ if (witem->size_pixels != g_value_get_boolean (value))
+ {
+ witem->size_pixels = g_value_get_boolean (value);
+ update = TRUE;
+ }
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+ break;
+ }
+
+ if (update)
+ (* GNOME_CANVAS_ITEM_GET_CLASS (item)->update) (item, NULL, NULL, 0);
+
+ if (calc_bounds)
+ recalc_bounds (witem);
+}
+
+static void
+gnome_canvas_widget_get_property (GObject *object,
+ guint param_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GnomeCanvasWidget *witem;
+
+ g_return_if_fail (object != NULL);
+ g_return_if_fail (GNOME_IS_CANVAS_WIDGET (object));
+
+ witem = GNOME_CANVAS_WIDGET (object);
+
+ switch (param_id) {
+ case PROP_WIDGET:
+ g_value_set_object (value, (GObject *) witem->widget);
+ break;
+
+ case PROP_X:
+ g_value_set_double (value, witem->x);
+ break;
+
+ case PROP_Y:
+ g_value_set_double (value, witem->y);
+ break;
+
+ case PROP_WIDTH:
+ g_value_set_double (value, witem->width);
+ break;
+
+ case PROP_HEIGHT:
+ g_value_set_double (value, witem->height);
+ break;
+
+ case PROP_ANCHOR:
+ g_value_set_enum (value, witem->anchor);
+ break;
+
+ case PROP_SIZE_PIXELS:
+ g_value_set_boolean (value, witem->size_pixels);
+ break;
+
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
+ break;
+ }
+}
+
+static void
+gnome_canvas_widget_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
+{
+ GnomeCanvasWidget *witem;
+
+ witem = GNOME_CANVAS_WIDGET (item);
+
+ if (parent_class->update)
+ (* parent_class->update) (item, affine, clip_path, flags);
+
+ if (witem->widget) {
+ if (witem->size_pixels) {
+ witem->cwidth = (int) (witem->width + 0.5);
+ witem->cheight = (int) (witem->height + 0.5);
+ } else {
+ witem->cwidth = (int) (witem->width * item->canvas->pixels_per_unit + 0.5);
+ witem->cheight = (int) (witem->height * item->canvas->pixels_per_unit + 0.5);
+ }
+
+ gtk_widget_set_size_request (witem->widget, witem->cwidth, witem->cheight);
+ } else {
+ witem->cwidth = 0.0;
+ witem->cheight = 0.0;
+ }
+
+ recalc_bounds (witem);
+}
+
+static void
+gnome_canvas_widget_render (GnomeCanvasItem *item,
+ GnomeCanvasBuf *buf)
+{
+#if 0
+ GnomeCanvasWidget *witem;
+
+ witem = GNOME_CANVAS_WIDGET (item);
+
+ if (witem->widget)
+ gtk_widget_queue_draw (witem->widget);
+#endif
+
+}
+
+static void
+gnome_canvas_widget_draw (GnomeCanvasItem *item,
+ GdkDrawable *drawable,
+ int x, int y,
+ int width, int height)
+{
+#if 0
+ GnomeCanvasWidget *witem;
+
+ witem = GNOME_CANVAS_WIDGET (item);
+
+ if (witem->widget)
+ gtk_widget_queue_draw (witem->widget);
+#endif
+}
+
+static double
+gnome_canvas_widget_point (GnomeCanvasItem *item, double x, double y,
+ int cx, int cy, GnomeCanvasItem **actual_item)
+{
+ GnomeCanvasWidget *witem;
+ double x1, y1, x2, y2;
+ double dx, dy;
+
+ witem = GNOME_CANVAS_WIDGET (item);
+
+ *actual_item = item;
+
+ gnome_canvas_c2w (item->canvas, witem->cx, witem->cy, &x1, &y1);
+
+ x2 = x1 + (witem->cwidth - 1) / item->canvas->pixels_per_unit;
+ y2 = y1 + (witem->cheight - 1) / item->canvas->pixels_per_unit;
+
+ /* Is point inside widget bounds? */
+
+ if ((x >= x1) && (y >= y1) && (x <= x2) && (y <= y2))
+ return 0.0;
+
+ /* Point is outside widget bounds */
+
+ if (x < x1)
+ dx = x1 - x;
+ else if (x > x2)
+ dx = x - x2;
+ else
+ dx = 0.0;
+
+ if (y < y1)
+ dy = y1 - y;
+ else if (y > y2)
+ dy = y - y2;
+ else
+ dy = 0.0;
+
+ return sqrt (dx * dx + dy * dy);
+}
+
+static void
+gnome_canvas_widget_bounds (GnomeCanvasItem *item, double *x1, double *y1, double *x2, double *y2)
+{
+ GnomeCanvasWidget *witem;
+
+ witem = GNOME_CANVAS_WIDGET (item);
+
+ *x1 = witem->x;
+ *y1 = witem->y;
+
+ switch (witem->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_SW:
+ break;
+
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_S:
+ *x1 -= witem->width / 2.0;
+ break;
+
+ case GTK_ANCHOR_NE:
+ case GTK_ANCHOR_E:
+ case GTK_ANCHOR_SE:
+ *x1 -= witem->width;
+ break;
+
+ default:
+ break;
+ }
+
+ switch (witem->anchor) {
+ case GTK_ANCHOR_NW:
+ case GTK_ANCHOR_N:
+ case GTK_ANCHOR_NE:
+ break;
+
+ case GTK_ANCHOR_W:
+ case GTK_ANCHOR_CENTER:
+ case GTK_ANCHOR_E:
+ *y1 -= witem->height / 2.0;
+ break;
+
+ case GTK_ANCHOR_SW:
+ case GTK_ANCHOR_S:
+ case GTK_ANCHOR_SE:
+ *y1 -= witem->height;
+ break;
+
+ default:
+ break;
+ }
+
+ *x2 = *x1 + witem->width;
+ *y2 = *y1 + witem->height;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-30 17:18:44 +0800