protected override void OnMouseDown(Document document, ToolMouseEventArgs e)
{
// We only do stuff with the left mouse button
if (e.MouseButton != MouseButton.Left)
{
return;
}
// Ctrl click is set origin, regular click is begin drawing
if (!e.IsControlPressed)
{
if (origin.IsNotSet())
{
return;
}
painting = true;
if (offset.IsNotSet())
{
offset = new Cairo.Point(e.Point.X - origin.X, e.Point.Y - origin.Y);
}
document.Layers.ToolLayer.Clear();
document.Layers.ToolLayer.Hidden = false;
surface_modified = false;
undo_surface = document.Layers.CurrentUserLayer.Surface.Clone();
}
else
{
origin = e.Point;
}
}
protected override void OnMouseMove(Document document, ToolMouseEventArgs e)
{
if (!painting || offset.IsNotSet())
{
return;
}
var x = e.Point.X;
var y = e.Point.Y;
if (last_point.IsNotSet())
{
last_point = e.Point;
return;
}
using (var g = document.CreateClippedToolContext()) {
g.Antialias = UseAntialiasing ? Cairo.Antialias.Subpixel : Cairo.Antialias.None;
g.MoveTo(last_point.X, last_point.Y);
g.LineTo(x, y);
g.SetSource(document.Layers.CurrentUserLayer.Surface, offset.X, offset.Y);
g.LineWidth = BrushWidth;
g.LineCap = Cairo.LineCap.Round;
g.Stroke();
}
var dirty_rect = CairoExtensions.GetRectangleFromPoints(last_point, e.Point, BrushWidth + 2);
last_point = e.Point;
surface_modified = true;
document.Workspace.Invalidate(dirty_rect);
}
