public ScrollbarSample ()
{
WidthRequest = 300;
HeightRequest = 300;
canvas = new Canvas ();
label = new Label ("Use the scrollbars\nto move this label");
canvas.AddChild (label);
Add (canvas, 0, 0, hexpand:true, vexpand:true);
vscroll = new VScrollbar () {
LowerValue = 0,
UpperValue = 300,
PageIncrement = 10,
PageSize = 50,
StepIncrement = 1
};
Add (vscroll, 1, 0, vexpand:true);
hscroll = new HScrollbar () {
LowerValue = 0,
UpperValue = 300,
PageIncrement = 10,
PageSize = 50,
StepIncrement = 1
};
Add (hscroll, 0, 1, hexpand:true);
vscroll.ValueChanged += HandleValueChanged;
hscroll.ValueChanged += HandleValueChanged;
}
void IXwtRender.CreateForWidgetContext(IRenderer renderer, IRenderOwner rendererimpl, Canvas widget)
{
Xwt.Canvas view = null;
IntPtr hwnd;
EventHandler sizefunc = null;
if (Xwt.Toolkit.CurrentEngine.Type == ToolkitType.Wpf)
{
hwnd = GetHwnd(widget.ParentWindow);
}
else
{
hwnd = GetHwndFromGtk(Xwt.Toolkit.CurrentEngine.GetSafeBackend(widget));
if (hwnd == GetHwndFromGtk(widget.ParentWindow))
{
view = new global::Xwt.Canvas()
{
ExpandHorizontal = true, ExpandVertical = true, HorizontalPlacement = WidgetPlacement.Fill, VerticalPlacement = WidgetPlacement.Fill, MinWidth = 1, MinHeight = 1, BackgroundColor = Xwt.Drawing.Colors.Black
};
(widget as global::Xwt.Canvas).AddChild(view);
var viewbackend = Xwt.Toolkit.CurrentEngine.GetSafeBackend(view) as Xwt.Backends.ICanvasBackend;
var gtkview = viewbackend.GetType().GetPropertyValue(viewbackend, "Widget");
gtkview.GetType().SetPropertyValue(gtkview, "DoubleBuffered", false);
hwnd = GetHwndFromGtk(viewbackend);
Debug.Assert(hwnd != GetHwndFromGtk(widget.ParentWindow));
sizefunc = new EventHandler((s, a) => (widget as global::Xwt.Canvas).SetChildBounds(view, new Rectangle(Point.Zero, widget.Size)));
(widget as global::Xwt.Canvas).BoundsChanged += sizefunc;
sizefunc(null, EventArgs.Empty);
}
}
IWindowInfo WindowInfo = null;
IGraphicsContext gfxcontext = null;
WindowInfo = Utilities.CreateWindowsWindowInfo(hwnd);
gfxcontext = new global::OpenTK.Graphics.GraphicsContext(new GraphicsMode(new ColorFormat(8, 8, 8, 8), 24, 8), WindowInfo, null, 3, 2, GraphicsContextFlags.Default);
views[widget] = new viewinfo(WindowInfo, gfxcontext)
{
viewcanvas = view, sizefunc = sizefunc
};
gfxcontext.MakeCurrent(WindowInfo);
gfxcontext.LoadAll();
int major, minor;
GL.GetInteger(GetPName.MajorVersion, out major);
GL.GetInteger(GetPName.MinorVersion, out minor);
Console.WriteLine($"OpenGL {major}.{minor}");
gfxcontext.MakeCurrent(null);
}
public GridView()
{
this.minWidthPerChild = 0;
this.minHeightPerChild = 0;
this.canvas = new Canvas();
this.Content = canvas;
canvas.HorizontalPlacement = WidgetPlacement.Center;
canvas.VerticalPlacement = WidgetPlacement.Center;
canvas.BoundsChanged += (object sender, EventArgs e) => RecalculatePosition();
}
internal OpenTKRenderer(FrameFactory owner, IXwtRender xwtrender, Xwt.Canvas window, IRenderOwner renderer, size videosize)
{
// OpenTKRenderer.usecnt = 1;
this.owner = owner;
this.Xwt = xwtrender;
this.videosize = videosize;
this.window = window;
this.renderer = renderer;
this.viewsize = window.Size;
window.BoundsChanged += viewsizechanged;
this.actionthread = new Thread(run)
{
Name = "opentk"
};
this.actionthread.Start();
var _this = this;
this.Xwt.CreateForWidgetContext(this, this.renderer, window);
// Invoke(() =>
// {
this.Lock(false);
try
{
try
{
// GL.GetInternalformat(TextureTarget.Texture2D, SizedInternalFormat.Rgba8, InternalFormatParameter..TEXTUREIMAGEFORMAT, 1, &preferred_format).
this.vertices1 = new vertices(_vertices);
this.vertices2 = new vertices(_vertices2);
/* GL.GenBuffers(1, out buf_vertices2); // Generate 1 buffer
* GL.BindBuffer(BufferTarget.ArrayBuffer, buf_vertices2);
* GL.VertexAttribPointer(0, 2, VertexAttribPointerType.Float, false, 4 * sizeof(float), 0);
* GL.VertexAttribPointer(1, 2, VertexAttribPointerType.Float, false, 4 * sizeof(float), 2 * sizeof(float));
* GL.BufferData(BufferTarget.ArrayBuffer, sizeof(float) * vertices2.Length, vertices2, BufferUsageHint.StaticDraw);
* GL.EnableVertexAttribArray(0);
* GL.EnableVertexAttribArray(1);
*
* GL.GenBuffers(1, out buf_vertices3); // Generate 1 buffer
* GL.BindBuffer(BufferTarget.ArrayBuffer, buf_vertices3);
* GL.VertexAttribPointer(0, 2, VertexAttribPointerType.Float, false, 4 * sizeof(float), 0);
* GL.VertexAttribPointer(1, 2, VertexAttribPointerType.Float, false, 4 * sizeof(float), 2 * sizeof(float));
* GL.BufferData(BufferTarget.ArrayBuffer, sizeof(float) * vertices3.Length, vertices3, BufferUsageHint.StaticDraw);
* GL.EnableVertexAttribArray(0);
* GL.EnableVertexAttribArray(1);*/
// GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
/* this.presentshader = new shader(shadervertex, shaderfragment, vertices1);
* GL.UseProgram(this.presentshader);
* var pos = GL.GetUniformLocation(this.presentshader, "tex");
* GL.Uniform1(pos, 0);
*/
/* this.combineshader = new shader(combineshadervertex, combineshaderfragment, vertices1);
*
* GL.UseProgram(combineshader);
* var pos = GL.GetUniformLocation(this.combineshader, "tex");
* GL.Uniform1(pos, 0);
* pos = GL.GetUniformLocation(this.combineshader, "vpHeight");
* GL.Uniform1(pos, (float)videosize.height);
*
* this.deinterlaceblendshader = new shader(combineshadervertex, blendshaderfragment, vertices1);
* GL.UseProgram(deinterlaceblendshader);
* pos = GL.GetUniformLocation(this.deinterlaceblendshader, "vpHeight");
* GL.Uniform1(pos, (float)videosize.height);
*
* this.deinterlacesplitshader = new shader(combineshadervertex, splitshaderfragment, vertices1);
*
* GL.UseProgram(deinterlacesplitshader);
* pos = GL.GetUniformLocation(this.deinterlacesplitshader, "vpHeight");
* GL.Uniform1(pos, (float)videosize.height);*/
}
catch (Exception e)
{
// Log.LogException(e);
Dispose(true);
GC.SuppressFinalize(this);
throw;
}
}
finally
{
Unlock(false);
}
// });
}
