[Gtk-sharp-list] GnomeCanvas questions

[Jorge García]

Hi,

I have found the answer to the second question: in
gnome/glue/canvaspoints.c there is the g_print of the coordinates. 

Doesn't it be removed?

Jorge


GnomeCanvasPoints* gtksharp_gnome_canvas_points_new_from_array (guint
num_points, double *coords)
{
        int i, len;
        GnomeCanvasPoints *pts = gnome_canvas_points_new (num_points);
                                                                                                    
        g_print ("{");
                                                                                                    
        len = num_points * 2;
        for (i = 0; i < len; i++) {
                pts->coords[i] = coords[i];
                g_print ("%f ", pts->coords[i]);
        }
        g_print ("}\n");
                                                                                                    
        return pts;
}


On dl, 2004-04-26 at 19:41, Jorge García wrote:
> Hi,
> 
> does someone know how is the best method for declare a CanvasGroup?
> 
> With this sentence I get the following error:
> CanvasGroup group = new CanvasGroup(canvas.Root(),CanvasGroup.GType);		
> 
> ui.cs(196) error CS1501: No overload for method `Gnome.CanvasGroup'
> takes `2' arguments
> 
> But if I make like samples/Fifteen.cs example and I define a subclass of
> CanvasGroup then it works:
> 
> MyGroup group = new MyGroup(canvas.Root());
> 
> ...
> 
> public class MyGroup: Gnome.CanvasGroup{
> 		public MyGroup (CanvasGroup group)
> 			: base (group, CanvasGroup.GType)
> 			{
> 				
> 			}
> }
> 
> 
> 
> Another question that I have is how to write lines fast. I use this
> function (ported from George Lebl's DeveloperWorks article):
> 
> void DrawALine(CanvasGroup group,double x1, double y1, double x2, double
> y2, string color){
> 
> 	double[] coords = {x1, y1, x2, y2};
> 	/* allocate a new points array */
> 	CanvasPoints points = new CanvasPoints(coords);
> 
> 	/* draw the line */
> 	CanvasLine item = new CanvasLine(group);
> 	item.Points = points;
> 	item.FillColor = color;
> 	item.WidthUnits = 1.0;
> 	item.CanvasEvent += new Gnome.CanvasEventHandler (Item_Event);
> }
> 
> The problem with this function is that each time that it calls to
> "new CanvasPoints(coords)" the coordinates are showed by the console,
> and its makes veeeery slow my program (that uses thousands of lines)
> 
> 
> Thank you very much in advance,
> 
> Jorge
> 
> 
> 
> 
> 
> 
> 
> 
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