private static SafeControlHandle GetHandle(SurfaceHandler handler, bool scrollable, int width, int height, out Libui.uiAreaHandler outHandler)
{
outHandler = new Libui.uiAreaHandler
{
Draw = (nativeHandler, surface, args) =>
{
DrawEventArgs e = new DrawEventArgs(args);
handler.Draw(surfaceCache[surface], ref e);
},
MouseEvent = (nativeHandler, surface, args) =>
{
MouseEventArgs e = new MouseEventArgs(args);
handler.MouseEvent(surfaceCache[surface], ref e);
},
MouseCrossed = (nativeHandler, surface, left) =>
{
handler.MouseCrossed(surfaceCache[surface], left);
},
DragBroken = (nativeHandler, surface) => handler.DragBroken(surfaceCache[surface]),
KeyEvent = (nativeHandler, surface, args) =>
{
KeyEventArgs e = new KeyEventArgs(args);
return(handler.KeyEvent(surfaceCache[surface], ref e));
}
};
return(!scrollable
? new SafeControlHandle(Libui.Call <Libui.uiNewArea>()(outHandler))
: new SafeControlHandle(Libui.Call <Libui.uiNewScrollingArea>()(outHandler, width, height)));
}
/// <summary>
/// Initializes a new instance of the <see cref="Surface"/> class with the specified handler.
/// </summary>
/// <param name="events">The specified event handler.</param>
/// <param name="scrollable">Whether this surface is scrollable or not.</param>
/// <param name="width">The width of the scrollable surface.</param>
/// <param name="height">The height of the scrollable surface.</param>
public Surface(ISurfaceHandler events, bool scrollable = false, int width = -1, int height = -1)
{
SurfaceHandler surfaceEvents = new SurfaceHandler
{
Draw = (IntPtr surfaceHandler, IntPtr surface, ref Libui.uiAreaDrawParams args) =>
{
Surface realSurface = Surfaces[surface];
DrawEventArgs a = new DrawEventArgs(new Context(args.Context), new RectangleD(args.ClipX, args.ClipY, args.ClipWidth, args.ClipHeight), new SizeD(args.AreaWidth, args.AreaHeight));
events.Draw(realSurface, ref a);
},
MouseEvent = (IntPtr surfaceHandler, IntPtr surface, ref Libui.uiAreaMouseEvent args) =>
{
Surface realSurface = Surfaces[surface];
MouseEventArgs a = new MouseEventArgs(new PointD(args.X, args.Y), new SizeD(args.AreaWidth, args.AreaHeight), args.Up, args.Down, args.Count, args.Modifiers, args.Held1To64);
events.MouseEvent(realSurface, ref a);
},
MouseCrossed = (IntPtr surfaceHandler, IntPtr surface, bool left) =>
{
Surface realSurface = Surfaces[surface];
MouseCrossedEventArgs a = new MouseCrossedEventArgs(left);
events.MouseCrossed(realSurface, a);
},
DragBroken = (IntPtr surfaceHandler, IntPtr surface) =>
{
Surface realSurface = Surfaces[surface];
events.DragBroken(realSurface);
},
KeyEvent = (IntPtr surfaceHandler, IntPtr surface, ref Libui.uiAreaKeyEvent args) =>
{
Surface realSurface = Surfaces[surface];
KeyEventArgs a = new KeyEventArgs(args.Key, args.ExtKey, args.Modifier, args.Modifiers, args.Up);
return(events.KeyEvent(realSurface, ref a));
}
};
EventHandler = new Libui.uiAreaHandler
{
DragBroken = Marshal.GetFunctionPointerForDelegate(surfaceEvents.DragBroken),
Draw = Marshal.GetFunctionPointerForDelegate(surfaceEvents.Draw),
KeyEvent = Marshal.GetFunctionPointerForDelegate(surfaceEvents.KeyEvent),
MouseCrossed = Marshal.GetFunctionPointerForDelegate(surfaceEvents.MouseCrossed),
MouseEvent = Marshal.GetFunctionPointerForDelegate(surfaceEvents.MouseEvent)
};
IsScrollable = scrollable;
if (scrollable)
{
Handle = Libui.uiNewScrollingArea(EventHandler, width, height);
}
else
{
Handle = Libui.uiNewArea(EventHandler);
}
Surfaces[Handle] = this;
}
