Question

In traditional desktop app, I perform my custom canvas drawing as follow

class ChartingView : System.Windows.Controls.Canvas
{
    protected override void OnRender(DrawingContext drawingContext)
    {
        // ... All the juicy drawing code right here.
    }
}

However, how about in Metro? As in Windows.UI.Xaml.Controls.Canvas, I cannot find OnRender method for me to override.

Answer 1

You can use Children property to populate Canvas. You can put there primitives (shapes, lines, etc.) as well as “complex” controls. And as noted in the @Aaron Murgatroyd comment:

there is no way to just simply draw on a canvas frame by frame

To adjust them on the Canvas you should use Canvas.SetXYZ methods (see for example Canvas.SetLeft and Canvas.SetTop methods).