line.h

linux下的人机对话编程

 /*画线*/
int show_line(GtkWidget * canvas){
int i;
  GnomeCanvasPoints *points;
  GnomeCanvasGroup *group;
  group=gnome_canvas_root(GNOME_CANVAS(canvas));
  GnomeCanvasItem *line;
  points=gnome_canvas_points_new(31);
 
 
  double linepoints[62]={
       20.0,260.0,
       240.0,260.0,
       540.0,260.0,
       520.0,200.0,
       260.0,200.0,
       240.0,260.0,
       570.0,260.0,
       590.0,320.0,
       170.0,320.0,
       190.0,260.0,
       170.0,260.0,
       190.0,320.0,
       15.0,320.0,
       775.0,320.0,
       630.0,320.0,
       650.0,380.0,
       630.0,380.0,
       650.0,320.0,
       630.0,380.0,
       785.0,380.0,
       590.0,380.0,
       570.0,440.0,
       320.0,440.0,
       300.0,380.0,
       590.0,380.0,
       260.0,380.0,
       240.0,320.0,
       120.0,320.0,
       100.0,380.0,
       260.0,380.0,
       30.0,380.0
};


  for(i=0;i<62;i++){
  points->coords[i]=linepoints[i];
 }

  line= gnome_canvas_item_new(group,gnome_canvas_line_get_type(),
                      "points",points,"fill_color", "blue","width_units",4.0,
                      "join_style", GDK_CAP_BUTT,"line_style",
                      GDK_LINE_SOLID,NULL);
   
  gnome_canvas_points_unref(points);
 
 return 0;

}

int show_resist(GtkWidget * canvas){

  GnomeCanvasPoints *points,*points0;
  GnomeCanvasGroup *group;
  group=gnome_canvas_root(GNOME_CANVAS(canvas));
  
  int i,j;
 
  double points1[5][2]={
    20.0,260.0,
    15.0,320.0,
    30.0,380.0,
    775.0,320.0,
    800.0,380.0
  };
  double points2[4][2]={
    180.0,290.0,
    110.0,350.0,
    250.0,350.0,
    640.0,350.0
  };
  for(i=0;i<5;i++){
   points=gnome_canvas_points_new(2);
   
    points->coords[0]=points1[i][0];
    points->coords[1]=points1[i][1]-5.0;
    points->coords[2]=points1[i][0];
    points->coords[3]=points1[i][1]+5.0;

      
 

 gnome_canvas_item_new(group,gnome_canvas_line_get_type(),
                      "points",points,"fill_color", "white","width_units",1.0,
                      "join_style", GDK_CAP_BUTT,"line_style",
                      GDK_LINE_SOLID,NULL);
   
  gnome_canvas_points_unref(points);
   }
 for(j=0;j<4;j++){
   points0=gnome_canvas_points_new(2);
   
    points0->coords[0]=points2[j][0]+5.0;
    points0->coords[1]=points2[j][1];
    points0->coords[2]=points2[j][0]-5.0;
    points0->coords[3]=points2[j][1];

      
 

   gnome_canvas_item_new(group,gnome_canvas_line_get_type(),
                      "points",points0,"fill_color", "white","width_units",1.0,
                      "join_style", GDK_CAP_BUTT,"line_style",
                      GDK_LINE_SOLID,NULL);
   
  gnome_canvas_points_unref(points0);
   }

 return 1;
}