protected Control(int x, int y, int width, int height)
{
area = new Rect(x, y, width, height);
children = new ControlCollection(this);
//X = x;
//Y = y;
//Width = width;
//Height = height;
}
public DrawingContext(Bitmap bmp)
{
bitmap = bmp;
clipRect = new Rect(0, 0, bitmap.Width, bitmap.Height); // in screen coords
}
// in screen coordinates
public void PushClippingRectangle(Rect ctrlScreenArea)
{
if (ctrlScreenArea.Width < 0 || ctrlScreenArea.Height < 0)
throw new ArgumentException();
dx = ctrlScreenArea.X - translationX;
dy = ctrlScreenArea.Y - translationY;
translationX += dx;
translationY += dy;
Rect rect = ctrlScreenArea;
if (clippingRectangles.Count > 0)
{
Rect previousRect = (Rect)clippingRectangles.Peek();
//Rect previousRect = (Rect)clippingRectangles[clippingRectangles.Count - 1];
rect = ctrlScreenArea.Intersection(previousRect);
}
clippingRectangles.Push(rect);
//clippingRectangles.Add(rect);
clipRect = rect;
bitmap.SetClippingRectangle(rect.X, rect.Y, rect.Width, rect.Height);
}
public void PopClippingRectangle()
{
if (clippingRectangles.Count > 0)
{
clippingRectangles.Pop();
//clippingRectangles.RemoveAt(clippingRectangles.Count - 1);
Rect rect;
if (clippingRectangles.Count == 0)
rect = new Rect(0, 0, bitmap.Width, bitmap.Height);
else
rect = (Rect)clippingRectangles.Peek();
translationX -= dx;
translationY -= dy;
clipRect = rect;
//bitmap.SetClippingRectangle(res.X, res.Y, res.Width, res.Height);
}
else
{
Rect rect = new Rect(0, 0, bitmap.Width, bitmap.Height);
clipRect = rect;
translationX -= dx;
translationY -= dy;
//bitmap.SetClippingRectangle(rect.X, rect.Y, rect.Width, rect.Height);
}
}
public RenderTask(Control sender, Rect dirtyArea)
{
Sender = sender;
DirtyArea = dirtyArea;
}
private void RenderTask(RenderTask task)
{
Rect contentRect = new Rect(0, 0, desktop.Width, desktop.Height);
var dirtyRect = contentRect;
if (task != null)
dirtyRect = task.DirtyArea.Intersection(contentRect);
if (dirtyRect.IsZero)
return;
//dt = DateTime.Now;
var dc = new DrawingContext(bitmap);
dc.PushClippingRectangle(dirtyRect);
if (!dc.ClippingRectangle.IsZero)
{
desktop.RenderRecursive(dc);
desktop.PostRenderRecursive(dc);
}
dc.PopClippingRectangle();
dc.Close();
//ts = DateTime.Now - dt;
if (OnRenderRequest != null)
OnRenderRequest(bitmap, dirtyRect);
else
bitmap.Flush(dirtyRect.X, dirtyRect.Y, dirtyRect.Width, dirtyRect.Height);
//Rect dirtyRect2 = new Rect(0, 0, 300, 20);
//dc = new DrawingContext(screen);
//dc.PushClippingRectangle(dirtyRect2);
//Font font = Resources.GetFont(Resources.FontResources.CourierNew_10);
//dc.DrawRectangle(new SolidColorBrush(Color.White), null, 0, 0, 300, 20);
//dc.DrawText(dirtyRect.ToString() + "; Render: " + ts.ToString(), font, Color.Red, 3, 3);
//dc.PopClippingRectangle();
//dc.Close();
//screen.Flush(dirtyRect2.X, dirtyRect2.Y, dirtyRect2.Width, dirtyRect2.Height);
//Debug.Print("Render task: " + ts.ToString());
}
public void Invalidate(Rect rect)
{
if (!isSuspended)
{
//scrollManager.Update();
Rect sa = ScreenArea;
Rect r;
if (!rect.IsZero)
r = rect;
else
{
r = dirtyArea;
r.Combine(sa);
}
ProcessTask(new RenderTask(this, r));
if (rect.IsZero)
dirtyArea = sa;
}
}
public bool IntersectsScreenRect(Rect r)
{
return ScreenArea.Intersects(r);
}
protected override void OnRender(DrawingContext dc)
{
bool horizontal = orientation == Orientation.Horizontal;
// background
int trackRatio = 7;
int a = horizontal ? Height / trackRatio : Width / trackRatio;
if (horizontal)
trackArea = new Rect(0, (Height - a) / 2, Width, a);
else
trackArea = new Rect((Width - a) / 2, 0, a, Height);
Brush b = background ?? new SolidColorBrush(Color.DarkGray);
Pen border = new Pen(Color.Gray, 0);
dc.DrawRectangle(b, border, trackArea.X, trackArea.Y, trackArea.Width, trackArea.Height);
// thumb
int workarea = horizontal ? Width - thumbSize : Height - thumbSize;
int x = horizontal ? workarea * value / 100 : 0;
int y = horizontal ? 0 : Height - thumbSize - workarea * value / 100;
if (horizontal)
thumbArea = new Rect(x, y, thumbSize, Height);
else
thumbArea = new Rect(x, y, Width, thumbSize);
Brush bb = foreground ?? new LinearGradientBrush(Color.LightGray, Color.Black);
dc.DrawRectangle(bb, thumbBorder, thumbArea.X, thumbArea.Y, thumbArea.Width, thumbArea.Height);
}
