Re: [gnomemm] Rotating an item in gnomecanvas...............

[Murray Cumming <murrayc usa net>]

This list is for discussion of the C++ wrappers.

On Mon, 2003-09-29 at 11:10, Suresh Kumar wrote:
> Hi,
> 
>      I have drwan a rectangle in the canvas. When i used 
> gnome_canvas_item_rotate() to rotate the rectangle, i got the 
> error message "undefine reference to gnome_canvas_item_rotate".  
> Is gnomecanvas doesnt support this command? Does have to use 
> affine transforms for this?
> 
>      I want to rotate the rectangle to some degree based on some 
> origin points. For example, rotate the rectangle, which has the 
> boundary points (100,100) (200,200), to 45.0 degree based on the 
> point (100,100 ). How can i do it?
> 
> static void
> create_canvas_items(GtkWidget* canvas)
> {
>    GnomeCanvasGroup* group;
>    GnomeCanvasItem* item;
> 
>    group = gnome_canvas_root(GNOME_CANVAS(canvas));
> 
>    /* A translucent rectangle */
>    item = gnome_canvas_item_new (group,
>                                       
> gnome_canvas_rect_get_type(),
>                                       "x1", 100.0,
>                                       "y1", 100.0,
>                                       "x2", 200.0,
>                                       "y2", 200.0,
>                                       "fill_color_rgba", 
> 0x3cb37180,
>                                       "outline_color", "black",
>                                       "width_units", 4.0,
>                                       NULL);
> 
>     /*  Rotate  the rectangle */
> 
>    gnome_canvas_item_rotate(item,100.0,100.0,45.0);
> }
> 
> 
> Thanx.
> 
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-- 
Murray Cumming
murrayc usa net
www.murrayc.com