// 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);
}
protected override void OnPaint(Wimp.RedrawEventArgs e)
{
IntPtr trans_table = Sprites[0].TransTable;
// Render as is.
OS.Move(e.Origin.X + 40, e.Origin.Y + WindowHeight - 170);
Sprites[0].Plot(OSSpriteOp.PlotAction.OverWrite);
// Render scaled by factor of 2.
Sprites[0].PlotScaled(e.Origin.X + 180,
e.Origin.Y + WindowHeight - 220,
OSSpriteOp.PlotAction.OverWrite,
new OS.ScaleFactors(2, 2, 1, 1),
trans_table);
// Render transformed using matrix.
// Transformed sprites are not plotted at the current graphics position;
// the matrix/destination rectangle is used to place the sprite at the
// required position.
// The translation has to be applied here because we don't know ahead
// of time where the screen position is and it will change as the
// window is moved.
// A copy of the matrix has to be used so that the translation is applied
// only once to the original matrix rather than multiple times.
var local_matrix = (OS.Matrix)matrix.Clone();
local_matrix.Translate(e.Origin.X + 480, e.Origin.Y + WindowHeight - 170);
Sprites[0].PlotTransformed(OSSpriteOp.PlotAction.OverWrite,
local_matrix,
trans_table);
// Render transformed to destination parallelogram
var block = new OSSpriteOp.DestCoordBlock();
block.x0 = OS.ToDrawUnits(e.Origin.X + 600);
block.y0 = OS.ToDrawUnits(e.Origin.Y + WindowHeight - 70);
block.x1 = OS.ToDrawUnits(e.Origin.X + 800);
block.y1 = block.y0;
block.x2 = block.x1 + OS.ToDrawUnits(50);
block.y2 = OS.ToDrawUnits(e.Origin.Y + WindowHeight - 200);
block.x3 = block.x0 + OS.ToDrawUnits(50);
block.y3 = block.y2;
Sprites[0].PlotTransformed(OSSpriteOp.PlotAction.OverWrite,
block,
trans_table);
}