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/* Gtk+ User Interface Builder
* Copyright (C) 1999 Damon Chaplin
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <gnome.h>
#include "../gb.h"
/* Include the 21x21 icon pixmap for this widget, to be used in the palette */
#include "../graphics/gnome-canvas.xpm"
/*
* This is the GbWidget struct for this widget (see ../gbwidget.h).
* It is initialized in the init() function at the end of this file
*/
static GbWidget gbwidget;
static gchar *AntiAliased = "GnomeCanvas::aa";
static gchar *ScrollX1 = "GnomeCanvas::scroll_x1";
static gchar *ScrollY1 = "GnomeCanvas::scroll_y1";
static gchar *ScrollX2 = "GnomeCanvas::scroll_x2";
static gchar *ScrollY2 = "GnomeCanvas::scroll_y2";
static gchar *PixelsPerUnit = "GnomeCanvas::pixels_per_unit";
/******
* NOTE: To use these functions you need to uncomment them AND add a pointer
* to the function in the GbWidget struct at the end of this file.
******/
/*
* Creates a new GtkWidget of class GnomeCanvas, performing any specialized
* initialization needed for the widget to work correctly in this environment.
* If a dialog box is used to initialize the widget, return NULL from this
* function, and call data->callback with your new widget when it is done.
*/
/*
static GtkWidget*
gb_gnome_canvas_new (GbWidgetNewData *data)
{
}
*/
/*
* Creates the components needed to edit the extra properties of this widget.
*/
static void
gb_gnome_canvas_create_properties (GtkWidget * widget, GbWidgetCreateArgData * data)
{
property_add_bool (AntiAliased, _("Anti-Aliased:"),
_("If the canvas is anti-aliased, to smooth the edges of text and graphics"));
property_add_float (ScrollX1, _("X1:"), _("The minimum x coordinate"));
property_add_float (ScrollY1, _("Y1:"), _("The minimum y coordinate"));
property_add_float (ScrollX2, _("X2:"), _("The maximum x coordinate"));
property_add_float (ScrollY2, _("Y2:"), _("The maximum y coordinate"));
property_add_float (PixelsPerUnit, _("Pixels Per Unit:"),
_("The number of pixels corresponding to one unit"));
}
/*
* Gets the properties of the widget. This is used for both displaying the
* properties in the property editor, and also for saving the properties.
*/
static void
gb_gnome_canvas_get_properties (GtkWidget *widget, GbWidgetGetArgData * data)
{
gb_widget_output_bool (data, AntiAliased,
GPOINTER_TO_INT (gtk_object_get_data (GTK_OBJECT (widget), AntiAliased)));
gb_widget_output_float (data, ScrollX1, GNOME_CANVAS (widget)->scroll_x1);
gb_widget_output_float (data, ScrollY1, GNOME_CANVAS (widget)->scroll_y1);
gb_widget_output_float (data, ScrollX2, GNOME_CANVAS (widget)->scroll_x2);
gb_widget_output_float (data, ScrollY2, GNOME_CANVAS (widget)->scroll_y2);
gb_widget_output_float (data, PixelsPerUnit,
GNOME_CANVAS (widget)->pixels_per_unit);
}
/*
* Sets the properties of the widget. This is used for both applying the
* properties changed in the property editor, and also for loading.
*/
static void
gb_gnome_canvas_set_properties (GtkWidget * widget, GbWidgetSetArgData * data)
{
gboolean antialiased;
gfloat value;
gfloat scroll_x1, scroll_y1, scroll_x2, scroll_y2;
gfloat old_scroll_x1, old_scroll_y1, old_scroll_x2, old_scroll_y2;
gfloat pixels_per_unit;
antialiased = gb_widget_input_bool (data, AntiAliased);
if (data->apply)
gtk_object_set_data (GTK_OBJECT (widget), AntiAliased,
GINT_TO_POINTER (antialiased));
/* Also check for the old name we used for this. */
if (data->action == GB_LOADING)
{
antialiased = gb_widget_input_bool (data, "anti_aliased");
if (data->apply)
gtk_object_set_data (GTK_OBJECT (widget), AntiAliased,
GINT_TO_POINTER (antialiased));
}
scroll_x1 = old_scroll_x1 = GNOME_CANVAS (widget)->scroll_x1;
scroll_y1 = old_scroll_y1 = GNOME_CANVAS (widget)->scroll_y1;
scroll_x2 = old_scroll_x2 = GNOME_CANVAS (widget)->scroll_x2;
scroll_y2 = old_scroll_y2 = GNOME_CANVAS (widget)->scroll_y2;
value = gb_widget_input_float (data, ScrollX1);
if (data->apply)
scroll_x1 = value;
value = gb_widget_input_float (data, ScrollY1);
if (data->apply)
scroll_y1 = value;
value = gb_widget_input_float (data, ScrollX2);
if (data->apply)
scroll_x2 = value;
value = gb_widget_input_float (data, ScrollY2);
if (data->apply)
scroll_y2 = value;
if (scroll_x1 != old_scroll_x1 || scroll_y1 != old_scroll_y1
|| scroll_x2 != old_scroll_x2 || scroll_y2 != old_scroll_y2)
{
gnome_canvas_set_scroll_region (GNOME_CANVAS (widget),
scroll_x1, scroll_y1,
scroll_x2, scroll_y2);
}
pixels_per_unit = gb_widget_input_float (data, PixelsPerUnit);
if (data->apply)
gnome_canvas_set_pixels_per_unit (GNOME_CANVAS (widget), pixels_per_unit);
}
/*
* Sets the properties for the child widget specific to this type of
* parent widget.
*/
/*
static void
gb_gnome_canvas_set_child_props (GtkWidget * widget, GtkWidget * child, GbWidgetSetArgData * data)
{
}
*/
/*
* Adds menu items to a context menu which is just about to appear!
* Add commands to aid in editing a GnomeCanvas, with signals pointing to
* other functions in this file.
*/
/*
static void
gb_gnome_canvas_create_popup_menu (GtkWidget * widget, GbWidgetCreateMenuData * data)
{
}
*/
/*
* Writes the source code needed to create this widget.
* You have to output everything necessary to create the widget here, though
* there are some convenience functions to help.
*/
static void
gb_gnome_canvas_write_source (GtkWidget * widget, GbWidgetWriteSourceData * data)
{
if (data->create_widget)
{
if (gtk_object_get_data (GTK_OBJECT (widget), AntiAliased))
{
source_add (data,
" %s = gnome_canvas_new_aa ();\n",
data->wname);
}
else
{
source_add (data,
" %s = gnome_canvas_new ();\n",
data->wname);
}
}
gb_widget_write_standard_source (widget, data);
source_add (data,
" gnome_canvas_set_scroll_region (GNOME_CANVAS (%s), %g, %g, %g, %g);\n",
data->wname,
GNOME_CANVAS (widget)->scroll_x1,
GNOME_CANVAS (widget)->scroll_y1,
GNOME_CANVAS (widget)->scroll_x2,
GNOME_CANVAS (widget)->scroll_y2);
if (GNOME_CANVAS (widget)->pixels_per_unit != 1.0)
source_add (data,
" gnome_canvas_set_pixels_per_unit (GNOME_CANVAS (%s), %g);\n",
data->wname,
GNOME_CANVAS (widget)->pixels_per_unit);
}
/*
* Initializes the GbWidget structure.
* I've placed this at the end of the file so we don't have to include
* declarations of all the functions.
*/
GbWidget*
gb_gnome_canvas_init ()
{
/* Initialise the GTK type */
volatile GtkType type;
type = gnome_canvas_get_type();
/* Initialize the GbWidget structure */
gb_widget_init_struct(&gbwidget);
/* Fill in the pixmap struct & tooltip */
gbwidget.pixmap_struct = gnome_canvas_xpm;
gbwidget.tooltip = _("GnomeCanvas");
/* Fill in any functions that this GbWidget has */
gbwidget.gb_widget_create_properties = gb_gnome_canvas_create_properties;
gbwidget.gb_widget_get_properties = gb_gnome_canvas_get_properties;
gbwidget.gb_widget_set_properties = gb_gnome_canvas_set_properties;
gbwidget.gb_widget_write_source = gb_gnome_canvas_write_source;
/*
gbwidget.gb_widget_new = gb_gnome_canvas_new;
gbwidget.gb_widget_set_child_props = gb_gnome_canvas_set_child_props;
gbwidget.gb_widget_create_popup_menu = gb_gnome_canvas_create_popup_menu;
*/
return &gbwidget;
}
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