public void PatternsAndImages (Context ctx, double x, double y)
{
ctx.Save ();
ctx.Translate (x, y);
ctx.SetColor (Colors.Black);
// Dashed lines
ctx.SetLineWidth (2);
ctx.SetLineDash (15, 10, 10, 5, 5);
ctx.Rectangle (10, 10, 100, 100);
ctx.Stroke ();
ctx.SetLineDash (0);
// Image
var arcColor = new Color (1, 0, 1);
ImageBuilder ib = new ImageBuilder (30, 30);
ib.Context.Arc (15, 15, 15, 0, 360);
ib.Context.SetColor (arcColor);
ib.Context.Fill ();
ib.Context.SetColor (Colors.DarkKhaki);
ib.Context.Rectangle (0, 0, 5, 5);
ib.Context.Fill ();
var img = ib.ToVectorImage ();
ctx.DrawImage (img, 0, 0);
ctx.DrawImage (img, 0, 50, 50, 10);
ctx.Arc (100, 100, 15, 0, 360);
arcColor.Alpha = 0.4;
ctx.SetColor (arcColor);
ctx.Fill ();
// ImagePattern
ctx.Save ();
ctx.Translate (x + 130, y);
ctx.Pattern = new ImagePattern (img);
ctx.Rectangle (0, 0, 100, 100);
ctx.Fill ();
ctx.Restore ();
ctx.Restore ();
// Setting pixels
ctx.SetLineWidth (1);
for (int i=0; i<50;i++) {
for (var j=0; j<50;j++) {
Color c = Color.FromHsl (0.5, (double)i / 50d, (double)j / 50d);
ctx.Rectangle (i, j, 1, 1);
ctx.SetColor (c);
ctx.Fill ();
}
}
}
public override void OnRenderFrames ()
{
var prev = PreviousFrame;
var next = NextFrame;
for (int n=0; n<10; n++) {
var img1 = next.WithAlpha (((double)(n))/10.0);
var img2 = prev.WithAlpha (((double)(9-n))/10.0);
var ib = new ImageBuilder (img1.Size.Width, img2.Size.Height);
ib.Context.DrawImage (img1, 0, 0, ((double)(n)) / 10.0);
ib.Context.DrawImage (img2, 0, 0, ((double)(9 - n)) / 10.0);
AddImage (ib.ToVectorImage ());
AddPause (60);
}
}
protected override void OnSelectionChanged(EventArgs e)
{
if (SelectedRow == null)
return;
object value = store.GetNavigatorAt(SelectedRow).GetValue(nameCol);
if (value is BaseAlgorithm) {
TextLayout text = new TextLayout();
text.Text = value.ToString();
Size textSize = text.GetSize();
var ib = new ImageBuilder(textSize.Width, textSize.Height);
ib.Context.DrawTextLayout(text, 0, 0);
var d = CreateDragOperation();
d.Data.AddValue(value.GetType().AssemblyQualifiedName);
d.SetDragImage(ib.ToVectorImage(), -6, -4);
d.AllowedActions = DragDropAction.Link;
d.Start();
d.Finished += (object sender, DragFinishedEventArgs e2) => this.UnselectAll();
text.Dispose();
ib.Dispose();
} else {
this.UnselectRow(SelectedRow);
}
}
/// <summary>
/// Reloads file tree information.
/// </summary>
/// <param name="scans">Collection of loaded scans</param>
/// <param name="currentScan">Current focused scan</param>
/// <param name="save">Update scan collection</param>
public void Reload(ScanCollection scans, BaseScan currentScan = null, bool save = true)
{
if (scans.Count > 0) {
scans.Sort(scans[0]);
}
if (save) {
scanCollection = scans;
}
DataSource = store;
store.Clear();
TreePosition pos = null;
fiberTypeNodes = new Dictionary<string, TreePosition>();
foreach (BaseScan scan in scans) {
TreePosition currentNode;
if (fiberTypeNodes.ContainsKey(scan.FiberType)) {
currentNode = fiberTypeNodes[scan.FiberType];
} else {
TextLayout text = new TextLayout();
text.Text = scan.FiberType;
ImageBuilder ib = new ImageBuilder(text.GetSize().Width, text.GetSize().Height);
ib.Context.DrawTextLayout(text, Point.Zero);
currentNode = store.AddNode(null).SetValue(thumbnailCol, ib.ToVectorImage()).CurrentPosition;
fiberTypeNodes[scan.FiberType] = currentNode;
text.Dispose();
ib.Dispose();
}
var v = store.AddNode(currentNode)
.SetValue(nameCol, scan.ToString())
.SetValue(finishCol, scan.IsFinish() ? tick : cross)
.SetValue(saveStateCol, scan.HasUnsaved() ? "*" : "")
.CurrentPosition;
scan.position = v;
scan.parentPosition = currentNode;
if (currentScan != null) {
if (currentScan == scan) {
pos = v;
}
} else {
if (pos == null) {
pos = v;
}
}
scan.ScanDataChanged += OnScanDataChanged;
}
if (scans.Count > 0) {
ExpandToRow(pos);
SelectRow(pos);
}
LoadPreviewsAsync(scans);
}
public DrawingTest()
: base()
{
// Canvas size requests
WidthRequest = 400;
HeightRequest = 400;
Point p = new Point (centre, centre);
ib = new ImageBuilder (size, size);
// Draw off-screen images and convert to bitmap/vector
ib.Context.SetColor (Colors.Green);
DrawFocus (ib.Context, p);
bitmap = ib.ToBitmap ();
ib.Context.SetColor (Colors.Blue);
DrawFocus (ib.Context, p);
vectorImage = ib.ToVectorImage ();
}