void Item_Event(object obj, Gnome.CanvasEventArgs args)
{
EventButton ev = new EventButton(args.Event.Handle);
CanvasRE item = (CanvasRE)obj;
switch (ev.Type)
{
case EventType.ButtonPress:
if (ev.Button == 1)
{
remember_x = ev.X;
remember_y = ev.Y;
args.RetVal = true;
return;
}
else if (ev.Button == 3)
{
item.Destroy();
args.RetVal = true;
return;
}
break;
case EventType.TwoButtonPress:
ChangeItemColor(item);
args.RetVal = true;
return;
case EventType.MotionNotify:
Gdk.ModifierType state = (Gdk.ModifierType)ev.State;
if ((state & Gdk.ModifierType.Button1Mask) != 0)
{
double new_x = ev.X, new_y = ev.Y;
item.Move(new_x - remember_x, new_y - remember_y);
remember_x = new_x;
remember_y = new_y;
args.RetVal = true;
return;
}
break;
case EventType.EnterNotify:
item.WidthUnits = 3.0;
args.RetVal = true;
return;
case EventType.LeaveNotify:
item.WidthUnits = 1.0;
args.RetVal = true;
return;
}
args.RetVal = false;
return;
}
void AddObject(object obj, EventArgs args)
{
double x1 = random.Next(width);
double y1 = random.Next(height);
double x2 = random.Next(width);
double y2 = random.Next(height);
if (x1 > x2)
{
Swap(ref x1, ref x2);
}
if (y1 > y2)
{
Swap(ref y1, ref y2);
}
if ((x2 - x1) < 10)
{
x2 += 10;
}
if ((y2 - y1) < 10)
{
y2 += 10;
}
CanvasRE item = null;
if (random.Next(2) > 0)
{
item = new CanvasRect(canvas.Root());
}
else
{
item = new CanvasEllipse(canvas.Root());
}
item.X1 = x1;
item.Y1 = y1;
item.X2 = x2;
item.Y2 = y2;
item.FillColor = "white";
item.OutlineColor = "black";
item.WidthUnits = 1.0;
item.CanvasEvent += new Gnome.CanvasEventHandler(Item_Event);
}
void ChangeItemColor (CanvasRE item)
{
string[] colors = new string[] {"red", "yellow", "green", "cyan", "blue", "magenta"};
item.FillColor = colors[random.Next (colors.Length)];
}
void ChangeItemColor(CanvasRE item)
{
string[] colors = new string[] { "red", "yellow", "green", "cyan", "blue", "magenta" };
item.FillColor = colors[random.Next(colors.Length)];
}
