gtk.tar.gz_Gtk+ 图_gtk

#include <gtk-2.0/gtk/gtk.h> #include <math.h> static gint expose_event(GtkWidget *widget, GdkEventExpose *event) { int i; GdkGC *gc; GdkColormap *colormap; GdkColor color; gc=gdk_gc_new(widget->window); colormap=gtk_widget_get_colormap(widget); gdk_color_parse("red",&color); gdk_color_alloc(colormap,&color); gdk_gc_set_foreground(gc,&color); /*画正弦曲线*/ for(i=1;i<400;i++) { gdk_draw_line(widget->window,gc,i,200+100*sin(6.28*i/400),i+1,200+100*sin(6.28*(i+1)/400)); } gdk_gc_unref(gc); return FALSE; } int main(int argc,char **argv) { GtkWidget *win_main, *draw_area; gtk_init(&argc,&argv); win_main=gtk_window_new(GTK_WINDOW_TOPLEVEL); gtk_widget_set_usize(win_main,400,400); draw_area = gtk_drawing_area_new(); gtk_container_add(GTK_CONTAINER(win_main), draw_area); gtk_widget_show(draw_area); gtk_signal_connect(GTK_OBJECT(draw_area), "expose_event", (GtkSignalFunc) expose_event, NULL); gtk_signal_connect (GTK_OBJECT (win_main), "destroy", GTK_SIGNAL_FUNC (gtk_exit), NULL); gtk_widget_set_events(draw_area, GDK_EXPOSURE_MASK); gtk_widget_show(win_main); gtk_main(); return 0; }