private void LoadHandler(object sender, EventArgs e)
{
// Set up caps
GL.Disable(EnableCap.DepthTest);
GL.Enable(EnableCap.RescaleNormal);
// Set up blending
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
// Set background color
GL.ClearColor(Color.White);
// Init keyboard to ensure first frame won't NPE
_keyboard = Keyboard.GetState();
_mouse = Mouse.GetState();
GlNanoVG.nvgCreateGL(ref _nvg, (int)NvgCreateFlags.AntiAlias | (int)NvgCreateFlags.StencilStrokes);
NanoVG.nvgStrokeWidth(_nvg, 1);
NanoVG.nvgStrokeColor(_nvg, NanoVG.nvgRGBA(0, 0, 0, 255));
_simulator = new Simulator();
}
private void Render(object sender, FrameEventArgs e)
{
// Reset the view
GL.Clear(ClearBufferMask.ColorBufferBit |
ClearBufferMask.DepthBufferBit |
ClearBufferMask.StencilBufferBit);
//GL.PushMatrix();
NanoVG.nvgBeginFrame(Nvg, Width, Height, 1);
NanoVG.nvgSave(Nvg);
NanoVG.nvgScale(Nvg, Zoom, Zoom);
//_grid.Draw();
NanoVG.nvgTranslate(Nvg, _nodeRenderer.gridOffset.X, _nodeRenderer.gridOffset.Y);
NanoVG.nvgStrokeWidth(Nvg, 2);
NanoVG.nvgStrokeColor(Nvg, NanoVG.nvgRGBA(0, 0, 0, 255));
NanoVG.nvgBeginPath(Nvg);
NanoVG.nvgMoveTo(Nvg, -_nodeRenderer.gridPitch, 0);
NanoVG.nvgLineTo(Nvg, _nodeRenderer.gridPitch, 0);
NanoVG.nvgStroke(Nvg);
NanoVG.nvgBeginPath(Nvg);
NanoVG.nvgMoveTo(Nvg, 0, -_nodeRenderer.gridPitch);
NanoVG.nvgLineTo(Nvg, 0, _nodeRenderer.gridPitch);
NanoVG.nvgStroke(Nvg);
const int cxnLineWidth = 3;
NanoVG.nvgStrokeWidth(Nvg, cxnLineWidth);
if (Selection.DraggingConnection != null)
{
var end = _mouseCanvasSpace;
if (Selection.CreatingConnectedNode)
{
end = new Vector2(_contextMenu.X, _contextMenu.Y);
}
var picked = Selection.HoveringConnection;
if (picked != null && picked.Side != Selection.DraggingConnection.Side)
{
var b = picked.GetBounds();
end = new Vector2(b.X, b.Y);
}
_nodeRenderer.RenderConnection(Selection.DraggingConnection, end);
}
foreach (var node in Graph)
{
_nodeRenderer.RenderConnections(node);
}
foreach (var node in Graph)
{
_nodeRenderer.RenderNode(node);
}
if (Selection.SelectionRectangle != null && Selection.SelectionRectangle.Width != 0 && Selection.SelectionRectangle.Height != 0)
{
NanoVG.nvgFillColor(Nvg, _selectionRectangleColor.ToNvgColor());
NanoVG.nvgBeginPath(Nvg);
var r = Selection.SelectionRectangle;
var x = Math.Min(r.X, r.X + r.Width);
var y = Math.Min(r.Y, r.Y + r.Height);
var w = Math.Abs(r.Width);
var h = Math.Abs(r.Height);
NanoVG.nvgRect(Nvg, x, y, w, h);
NanoVG.nvgFill(Nvg);
}
NanoVG.nvgRestore(Nvg);
_contextMenu.Render();
GL.Color4(0, 0, 0, 1f);
if (Keyboard[Key.D] && Focused && TextBoxHandler.TextBox == null)
{
// Static diagnostic header
NanoVG.nvgSave(Nvg);
NanoVG.nvgFillColor(Nvg, Color.Black.ToNvgColor());
NvgHelper.RenderString($"{Zoom}x Zoom");
NanoVG.nvgTranslate(Nvg, 0, FontLineHeight);
NvgHelper.RenderString($"{Graph.Count} Nodes");
// Sparklines
// GL.Translate(5, (int)(Height - Font.Common.LineHeight * 1.4f * 2), 0);
// _fpsSparkline.Render(Color.Blue, Color.LimeGreen);
// GL.Translate(0, (int)(Font.Common.LineHeight * 1.4f), 0);
// _renderTimeSparkline.Render(Color.Blue, Color.LimeGreen);
NanoVG.nvgRestore(Nvg);
}
NanoVG.nvgEndFrame(Nvg);
// Swap the graphics buffer
SwapBuffers();
}
public override void Draw(NVGcontext ctx)
{
base.Draw(ctx);
Theme style = this.theme;
NVGcolor gradTopColor = style.buttonGradientTopUnfocusedColor;
NVGcolor gradBotColor = style.buttonGradientBotUnfocusedColor;
if (this.pushed)
{
gradTopColor = style.buttonGradientTopPushedColor;
gradBotColor = style.buttonGradientBotPushedColor;
}
else
{
gradTopColor = style.buttonGradientTopFocusedColor;
gradBotColor = style.buttonGradientBotFocusedColor;
}
Vector2 pos = this.localPosition;
Vector2 size = this.size;
NanoVG.nvgBeginPath(ctx);
NanoVG.nvgRoundedRect(ctx, pos.X + 1f, pos.Y + 1f, size.X - 2f, size.Y - 2f
, style.buttonCornerRadius - 1f);
NanoVG.nvgFillColor(ctx, gradTopColor);
NanoVG.nvgFill(ctx);
if (0f < this.backgroundColor.a)
{
// fill background.
}
NVGpaint gradient = NanoVG.nvgLinearGradient(ctx, pos.X, pos.Y, pos.X, pos.Y + size.Y
, gradTopColor, gradBotColor);
NanoVG.nvgFillPaint(ctx, gradient);
NanoVG.nvgFill(ctx);
NanoVG.nvgBeginPath(ctx);
NanoVG.nvgStrokeWidth(ctx, 1f);
NanoVG.nvgRoundedRect(ctx, pos.X + 0.5f, pos.Y + (this.pushed ? 0.5f : 1.5f)
, size.X - 1f, size.Y - 1 - (this.pushed ? 0f : 1f)
, style.buttonCornerRadius);
NanoVG.nvgStrokeColor(ctx, style.borderLightColor);
NanoVG.nvgStroke(ctx);
NanoVG.nvgBeginPath(ctx);
NanoVG.nvgRoundedRect(ctx, pos.X + 0.5f, pos.Y + 0.5f
, size.X - 1f, size.Y - 2f
, style.buttonCornerRadius);
NanoVG.nvgStrokeColor(ctx, style.borderDarkColor);
NanoVG.nvgStroke(ctx);
int currFontSize = 0 > this.fontSize ? style.buttonFontSize : this.fontSize;
NanoVG.nvgFontSize(ctx, currFontSize);
NanoVG.nvgFontFace(ctx, style.fontBold);
float tw = NanoVG.nvgTextBounds(ctx, 0f, 0f, this.caption, null);
Vector2 center = pos + size * 0.5f;
Vector2 textPos = new Vector2(center.X - tw * 0.5f, center.Y - 1f);
NVGcolor currTextColor = GetCurrTextColor();
int btnIcon = this.icon;
if (0 != btnIcon)
{
float iw, ih;
iw = 0f;
ih = currFontSize;
byte[] icon = Fonts.GetIconUTF8(btnIcon);
if (NanoVG.nvgIsFontIcon(btnIcon))
{
ih *= 1.5f;
NanoVG.nvgFontSize(ctx, ih);
NanoVG.nvgFontFace(ctx, style.fontIcons);
iw = NanoVG.nvgTextBounds(ctx, 0, 0, icon, null);
}
else
{
int w, h;
w = h = 1;
ih *= 0.9f;
NanoVG.nvgImageSize(ctx, btnIcon, ref w, ref h);
if (0 < h)
{
iw = w * ih / h;
}
}
if (!string.IsNullOrEmpty(this.caption))
{
iw += size.Y * 0.15f;
}
NanoVG.nvgFillColor(ctx, currTextColor);
NanoVG.nvgTextAlign(ctx, (int)(NVGalign.NVG_ALIGN_LEFT | NVGalign.NVG_ALIGN_MIDDLE));
Vector2 iconPos = center;
iconPos.Y -= 1f;
switch (this.iconAnchorType)
{
case IconAnchorType.LeftCentered:
{
iconPos.X -= (tw + iw) * 0.5f;
textPos.X += iw * 0.5f;
}
break;
case IconAnchorType.RightCentered:
{
textPos.X -= iw * 0.5f;
iconPos.X += tw * 0.5f;
}
break;
case IconAnchorType.Left:
{
iconPos.X = pos.X + 8f;
}
break;
case IconAnchorType.Right:
{
iconPos.X = pos.X + size.X - iw - 8f;
}
break;
default:
break;
}
if (NanoVG.nvgIsFontIcon(btnIcon))
{
// NOTE: icon rendering bug, any unicode > 0x10000 not being rendered correctly.
// e.g. 0x1F680 (Font.Entypo.ICON_ROCKET).
NanoVG.nvgText(ctx, iconPos.X, iconPos.Y + 1f, icon);
}
else
{
float imgAlpha = this.enabled ? 0.5f : 0.25f;
NVGpaint imgPaint = NanoVG.nvgImagePattern(
ctx
, iconPos.X, iconPos.Y - ih * 0.5f, iw, ih
, 0f, btnIcon, imgAlpha);
NanoVG.nvgFillPaint(ctx, imgPaint);
NanoVG.nvgFill(ctx);
}
// DEBUG: ICON BOUNDS
//NanoVG.nvgStrokeWidth (ctx, 1.0f);
//NanoVG.nvgBeginPath (ctx);
//NanoVG.nvgRect (ctx, iconPos.X, iconPos.Y - ih * 0.5f, iw, ih);
//NanoVG.nvgStrokeColor (ctx, textColor);
//NanoVG.nvgStroke(ctx);
}
NanoVG.nvgFontSize(ctx, currFontSize);
NanoVG.nvgFontFace(ctx, style.fontBold);
NanoVG.nvgTextAlign(ctx, (int)(NVGalign.NVG_ALIGN_LEFT | NVGalign.NVG_ALIGN_MIDDLE));
NanoVG.nvgFillColor(ctx, style.textShadowColor);
NanoVG.nvgText(ctx, textPos.X, textPos.Y, this.caption);
NanoVG.nvgFillColor(ctx, currTextColor);
NanoVG.nvgText(ctx, textPos.X, textPos.Y + 1f, this.caption);
}
public void Execute(NVGcontext ctx)
{
NanoVG.nvgStrokeWidth(ctx, Width);
}
