public void DrawAxisText(ModelViewSurface surface, SKCanvas canvas)
{
SKPaint axisPaint = new SKPaint()
{
Style = SKPaintStyle.StrokeAndFill,
Color = Color.LightGray.ToSKColor(),
IsAntialias = true,
BlendMode = SKBlendMode.Lighten,
StrokeWidth = 1,
TextAlign = SKTextAlign.Center,
TextSize = surface.ViewHeight / 75
};
for (float x = gridStartXbig; x < surface.ViewWidth * surface.ScaleFactor; x += ScaledStep * 10)
{
SKPoint pt = IssoConvert.IssoPoint2DToSkPoint(new IssoPoint2D()
{
X = x, Y = surface.Origin.Y
},
surface.ScaleFactor, surface.Origin, surface.ViewHeight);
pt.Y -= axisPaint.TextSize * 2;
canvas.DrawText(x.ToString("F1"), pt, axisPaint);
}
axisPaint.TextAlign = SKTextAlign.Left;
for (float y = gridStartYbig + ScaledStep * 10; y < surface.ViewHeight * surface.ScaleFactor; y += ScaledStep * 10)
{
SKPoint pt = IssoConvert.IssoPoint2DToSkPoint(new IssoPoint2D()
{
X = surface.Origin.X,
Y = y
}, surface.ScaleFactor, surface.Origin, surface.ViewHeight);
pt.X += axisPaint.TextSize;
pt.Y += axisPaint.TextSize / 2;
canvas.DrawText(y.ToString("F1"), pt, axisPaint);
}
}
public void DrawGrid(ModelViewSurface surface, SKCanvas canvas)
{
if (UpdateNeeded)
{
gridBMP = new SKBitmap((int)Math.Round(surface.ViewWidth), (int)Math.Round(surface.ViewHeight));
gridBuffer = new SKCanvas(gridBMP);
float x = surface.Origin.X;
float y = surface.Origin.Y;
// Найдём ближайшее кратное
// Количество крупных и мелких делений сетки всегда примерно определённое.
// Берём ширину окна просмотра и делим её на сто частей
float stepx = surface.ViewWidth / 100;
// Определим, скольки линейным единицам модели равен этот шаг
// И округлим его
ScaledStep = (float)Math.Round(stepx / surface.ScaleFactor, 1);
// Теперь найдём кратное ScaledStep число, ближайшее к surface.Origin
gridStartX = (float)Math.Floor(x / ScaledStep) * ScaledStep;
gridStartY = (float)Math.Floor(y / ScaledStep) * ScaledStep;
if (gridStartX < x)
{
gridStartX += ScaledStep;
}
if (gridStartY < y)
{
gridStartY += ScaledStep;
}
gridStartXbig = (float)Math.Floor(x / (ScaledStep * 10)) * ScaledStep * 10;
gridStartYbig = (float)Math.Floor(y / (ScaledStep * 10)) * ScaledStep * 10;
if (gridStartX < x)
{
gridStartX += ScaledStep;
}
if (gridStartY < y)
{
gridStartY += ScaledStep;
}
if (gridStartXbig < x)
{
gridStartXbig += ScaledStep * 10;
}
if (gridStartYbig < y)
{
gridStartYbig += ScaledStep * 10;
}
// Теперь рисуем. Для крупных и мелких делений - своя структура SKPaint
SKPaint PaintSmall = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = Color.FromRgb(20, 20, 20).ToSKColor(),
IsAntialias = true,
StrokeWidth = 1
};
SKPaint PaintBig = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = PaintSmall.Color,
IsAntialias = true,
StrokeWidth = 3
};
SKPoint smallStart = IssoConvert.IssoPoint2DToSkPoint(new IssoPoint2D()
{
X = gridStartX, Y = gridStartY
},
surface.ScaleFactor, surface.Origin, surface.ViewHeight);
SKPoint bigStart = IssoConvert.IssoPoint2DToSkPoint(new IssoPoint2D()
{
X = gridStartXbig, Y = gridStartYbig
},
surface.ScaleFactor, surface.Origin, surface.ViewHeight);
for (x = smallStart.X; x < surface.ViewWidth; x += ScaledStep * surface.ScaleFactor)
{
gridBuffer.DrawLine(x, 0, x, surface.ViewHeight, PaintSmall);
}
for (x = bigStart.X; x < surface.ViewWidth; x += ScaledStep * 10 * surface.ScaleFactor)
{
gridBuffer.DrawLine(x, 0, x, surface.ViewHeight, PaintBig);
}
for (y = smallStart.Y; y > 0; y -= ScaledStep * surface.ScaleFactor)
{
gridBuffer.DrawLine(0, y, surface.ViewWidth, y, PaintSmall);
}
for (y = bigStart.Y; y > 0; y -= ScaledStep * 10 * surface.ScaleFactor)
{
gridBuffer.DrawLine(0, y, surface.ViewWidth, y, PaintBig);
}
DrawCoordinationSystem(surface, gridBuffer);
DrawAxisText(surface, gridBuffer);
UpdateNeeded = false;
}
canvas.DrawBitmap(gridBMP, 0, 0);
}
public void Touch(SKTouchEventArgs e)
{
if (e.ActionType == SKTouchAction.WheelChanged)
{
WheelZoom(e.WheelDelta);
return;
}
if (e.MouseButton == SKMouseButton.Right)
{
CancelAction();
return;
}
try
{
IssoPoint2D pt1 = IssoConvert.SkPointToIssoPoint2D(e.Location, ScaleFactor, ModelViewFragment, ViewHeight);
// TODO: Обработать активность привязок
pt1 = Grid.Snap(pt1);
modelVM.SnapPoint = modelVM.SnapToNodes(pt1);
if (modelVM.SnapPoint.X != float.MinValue)
{
pt1.X = modelVM.SnapPoint.X;
}
if (modelVM.SnapPoint.Y != float.MinValue)
{
pt1.Y = modelVM.SnapPoint.Y;
}
// TODO: Окончание создания компонентов при "касательном" вводе
// НАЖАТИЕ
if (e.ActionType == SKTouchAction.Pressed)
{
switch (EditorAction)
{
case EditorActions.None: StartPt = pt1; SelectComponent(pt1); break;
case EditorActions.SelectFrame: SelectByFrame(pt1, SelectionStarted); break;
case EditorActions.NewLinearFirstPoint: CreateNewLinear(pt1); break;
case EditorActions.NewLinearLastPoint: FinishNewLinear(pt1, e.MouseButton); break;
case EditorActions.EditNode: CreateOrEditNode(pt1); break;
case EditorActions.NewDimensionFirstNode: DimensionFirstNode(pt1); break;
case EditorActions.NewDimensionVFirstNode: DimensionFirstNode(pt1); break;
case EditorActions.NewDimensionLastNode: DimensionLastNode(pt1); break;
case EditorActions.NewDimensionLinePlace: DimensionLinePlace(pt1); break;
case EditorActions.NewForce: CreateForce(pt1); break;
case EditorActions.NewDstLoad: CreateDistLoad(pt1); break;
case EditorActions.MirrorElements: MirrorElements(pt1, true); break;
case EditorActions.CopyElements: CopyElements(pt1, CopyBasePointDefined); break;
}
}
// ДВИЖЕНИЕ
if (e.ActionType == SKTouchAction.Moved)
{
EndPt = pt1;
MovingView = e.InContact && (IssoDist.PointDst(StartPt, EndPt) > (5 / ScaleFactor));
switch (EditorAction)
{
case EditorActions.NewLinearLastPoint: ChangeLastPoint(pt1); break;
case EditorActions.NewDimensionLastNode: ChangeDimPlace(pt1); break;
case EditorActions.NewDimensionLinePlace: ChangeDimPlace(pt1); break;
case EditorActions.SelectFrame: if (SelectionStarted)
{
SelectByFrame(pt1, false);
}
break;
case EditorActions.MirrorElements: MirrorElements(pt1, false); break;
case EditorActions.None: if (MovingView)
{
MoveOrigin();
}
break;
case EditorActions.CopyElements: CopyTargetPoint = pt1; break;
}
return;
}
}
finally
{
// ОТОБРАЖАЕМ ПРОЦЕСС РЕДАКТИРОВАНИЯ
if (EditorAction != EditorActions.None)
{
RModelView.InvalidateSurface();
}
OnVisualStates?.Invoke(EditorAction);
}
}
