/* 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 #include #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; }