// For a derived class, it is recommended to override the event notifier rather
// than subscribe to the event.
protected override void OnPaint(Wimp.RedrawEventArgs e)
{
var local_matrix = (OS.Matrix)matrix.Clone();
// Matrix translation is used to position the drawfile on screen within
// the window.
local_matrix.Translate(e.Origin.X, e.Origin.Y);
Drawfile.Render(0, draw_file, local_matrix, ref e.Redraw.Clip, 0);
// Technically, we should call the base method to ensure that event subscribers
// are also notified of this event, but I don't think that's necessary in this
// case.
// base.OnPaint (e);
}
public DrawDocument(string name) : base("MainWindow")
{
using (var file = new BinaryReader(File.Open(name, FileMode.Open)))
{
draw_file = new byte [file.BaseStream.Length];
file.Read(draw_file, 0, (int)file.BaseStream.Length);
// File is closed automatically at the end of the using scope.
}
OS.Rect bbox = Drawfile.GetBounds(0, draw_file, null);
// Convert the bounding box from Draw units to OS units
bbox.MinX >>= 8;
bbox.MinY >>= 8;
bbox.MaxX >>= 8;
bbox.MaxY >>= 8;
// Set the window extent to the size of the draw file.
Extent = new OS.Rect(0, 0, bbox.MinX + bbox.MaxX, bbox.MinX + bbox.MaxY);
Title = name;
}
