Canvas Test

 /*
 * File : canvastest.c
 *
 * Description : Simple application to demonstrate the use of the GnomeCanvas
 *         with libglade, and hopefully gdk-pixbuf's.
 *
 * Dependencies : canvastest.glade
 *
 * Author : Andrae Muys <andrae@humbug.org.au>
 *
 * Date : 22nd November 2000
 *
 * License : GPL.
 *
 */


 #include <glade/glade.h>
 #include <glade/glade-build.h>
 #include <gdk-pixbuf/gdk-pixbuf.h>
 #include <gnome.h>

 #define FILENAME "canvastest.glade"

 GladeXML *xml;

 GtkWidget? *NewGnomeCanvas?(GladeXML *xml, GladeWidgetInfo? *info) {
double x1, x2, y1, y2;
double ppu = 1.0;
int aa = 1;
GList *attrlist = info->attributes;
GnomeCanvas *canvas;

gdk_rgb_init();

while(attrlist) {
GladeAttribute? *attr = (GladeAttribute? *)attrlist->data;
if (strcmp(attr->name, "scroll_x1")) {
x1 = atof(attr->value);
} else if (!strcmp(attr->name, "scroll_x2")) {
x2 = atof(attr->value);
} else if (!strcmp(attr->name, "scroll_y1")) {
y1 = atof(attr->value);
} else if (!strcmp(attr->name, "scroll_y2")) {
y2 = atof(attr->value);
} else if (!strcmp(attr->name, "anti-aliased")) {
if (!strcmp(attr->value, "False")) {
aa = 0;
} else {
aa = 1;
}
} else if (!strcmp(attr->name, "pixels_per_unit")) {
ppu = atof(attr->value);
}
attrlist = g_list_next(attrlist);
}
if (aa) {
/*
gtk_widget_push_visual(gdk_rgb_get_visual());
gtk_widget_push_colormap(gdk_rgb_get_cmap());
 */
canvas = (GnomeCanvas*)gnome_canvas_new_aa();
/*
gtk_widget_pop_visual();
gtk_widget_pop_colormap();
 */
} else {
g_warning("Gdk mode for gnomeCanvas Depreciated.");
gtk_widget_push_visual(gdk_imlib_get_visual());
gtk_widget_push_colormap(gdk_imlib_get_colormap());
canvas = (GnomeCanvas*)gnome_canvas_new();
gtk_widget_pop_visual();
gtk_widget_pop_colormap();
}

gnome_canvas_set_scroll_region(canvas, x1, y1, x2, y2);
gnome_canvas_set_pixels_per_unit(canvas, ppu);

return GTK_WIDGET(canvas);
 }

 GladeWidgetBuildData? customWidgets[] = {
{ "GnomeCanvas", NewGnomeCanvas?, NULL },
{ NULL, NULL, NULL },
 };

 int main(int argc, char *argv[]) {
GtkWidget? *canvas;
GnomeCanvasItem? *item;
GnomeCanvasItem? *pixitem;
GdkPixbuf? *pixbuf;

gnome_init("canvastest", "0.01", argc, argv);
glade_init();

glade_register_widgets(customWidgets);

xml = glade_xml_new(FILENAME, "mainWindow");
if(!xml) {
g_warning("Could not load interface.");
return 1;
}

canvas = glade_xml_get_widget(xml, "canvas");
 /*
item = gnome_canvas_item_new(gnome_canvas_root(GNOME_CANVAS(canvas)),
gnome_canvas_rect_get_type(),
"x1", 100.0,
"y1", 100.0,
"x2", 300.0,
"y2", 300.0,
"fill_color_rgba", 0x3cb37180,
"outline_color", "black",
"width_units", 4.0,
NULL);
 */

pixbuf = gdk_pixbuf_new_from_file("/export/home/andrae/src/outlandish/water.jpg");
if (pixbuf == NULL) {
g_warning("couldn't load pixmap");
} else {
pixitem = gnome_canvas_item_new(gnome_canvas_root(GNOME_CANVAS(canvas)),
gnome_canvas_pixbuf_get_type(),
"pixbuf", pixbuf,
NULL);
gdk_pixbuf_unref(pixbuf);
}

glade_xml_signal_autoconnect(xml);
gtk_object_unref(GTK_OBJECT(xml));

gtk_main();

return 0;
 }