/// <summary>
/// Construct a canvas with the basic scene graph consisting of a root, camera,
/// and layer. Event handlers for zooming and panning are automatically
/// installed.
/// </summary>
public PCanvas()
{
// This call is required by the Windows.Forms Form Designer.
InitializeComponent();
CURRENT_PCANVAS = this;
cursorStack = new Stack();
Camera = PUtil.CreateBasicScenegraph();
DefaultRenderQuality = RenderQuality.HighQuality;
AnimatingRenderQuality = RenderQuality.LowQuality;
InteractingRenderQuality = RenderQuality.LowQuality;
//PanEventHandler = new PPanEventHandler();
ZoomEventHandler = new PZoomEventHandler();
//BackColor = Color.White;
//AllowDrop = true;
//SetStyle(ControlStyles.DoubleBuffer, true);
//SetStyle(ControlStyles.Selectable, true);
//SetStyle(ControlStyles.UserPaint, true);
//SetStyle(ControlStyles.AllPaintingInWmPaint, true);
realGraphics = CreateGraphics();
offscreenBitmap = new Bitmap(ClientSize.Width, ClientSize.Height); // 240, 294);
offscreenGraphics = Graphics.FromImage(offscreenBitmap);
}
//****************************************************************
// Scene Graph - Methods for constructing the scene graph.
//****************************************************************
/// <summary>
/// Override this method to modify the way the scene graph is created.
/// </summary>
/// <returns>The main camera node in the new scene graph.</returns>
protected virtual PCamera CreateBasicScenegraph()
{
return(PUtil.CreateBasicScenegraph());
}
