/// <summary>
/// Initialize paint settings. This is initialized after the base shape
/// has been painted.
/// </summary>
public PaintHelper(DiagramPaintEventArgs e, ExternalConstraintShape constraintShape)
{
StyleSet styleSet = constraintShape.StyleSet;
StyleSetResourceId penId = constraintShape.OutlinePenId;
Pen pen = styleSet.GetPen(penId);
Brush brush = styleSet.GetBrush(ExternalConstraintBrush);
SolidBrush coloredBrush = brush as SolidBrush;
// Keep the pen color in sync with the color being used for highlighting
Color startColor = constraintShape.UpdateDynamicColor(constraintShape.OutlinePenId, pen);
if (startColor.IsEmpty)
{
startColor = constraintShape.UpdateGeometryLuminosity(e.View, pen);
}
else
{
constraintShape.UpdateGeometryLuminosity(e.View, pen);
}
myPenStartColor = startColor;
Color newColor = pen.Color;
if (coloredBrush != null)
{
myBrushStartColor = coloredBrush.Color;
coloredBrush.Color = newColor;
}
else
{
myBrushStartColor = Color.Empty;
}
myBrush = brush;
myPen = pen;
}
/// <summary>
/// Replacement for <see cref="ShapeField.GetBackgroundBrush"/> that recognizes
/// <see cref="IDynamicColorGeometryHost"/>
/// </summary>
public override Pen GetPen(DiagramClientView view, ShapeElement parentShape, ref Color oldColor)
{
StyleSet styleSet = (parentShape != null) ? parentShape.StyleSet : null;
Color restoreColor = Color.Empty;
Pen pen = null;
if (styleSet != null)
{
StyleSetResourceId penId = GetPenId(parentShape);
pen = styleSet.GetPen(penId);
IDynamicColorGeometryHost dynamicColors = parentShape as IDynamicColorGeometryHost;
if (dynamicColors == null ||
(restoreColor = dynamicColors.UpdateDynamicColor(penId, pen)).IsEmpty)
{
if (view != null)
{
restoreColor = parentShape.UpdateGeometryLuminosity(view, pen);
}
}
else if (view != null)
{
parentShape.UpdateGeometryLuminosity(view, pen);
}
}
if (pen != null && !restoreColor.IsEmpty)
{
restoreColor = pen.Color;
}
return(pen);
}
/// <summary>
/// Paint the shape contents based on the operator type.
/// </summary>
protected override void OnPaintShape(DiagramPaintEventArgs e, ref PaintHelper helper)
{
base.OnPaintShape(e, ref helper);
ValueComparisonConstraint comparisonConstraint = this.AssociatedValueComparisonConstraint;
RectangleD bounds = this.AbsoluteBounds;
RectangleF boundsF = RectangleD.ToRectangleF(bounds);
Graphics g = e.Graphics;
ValueComparisonOperator comparisonOperator = comparisonConstraint.Operator;
Brush brush = helper.Brush;
// Draw the left and right comparison dots
float heightF = boundsF.Height;
float dotDiameter = heightF * DOT_FACTOR;
float dotRadius = dotDiameter / 2;
float dotTop = boundsF.Top + heightF / 2 - dotRadius;
g.FillEllipse(brush, boundsF.Left - dotRadius, dotTop, dotDiameter, dotDiameter);
g.FillEllipse(brush, boundsF.Right - dotRadius, dotTop, dotDiameter, dotDiameter);
if (comparisonOperator != ValueComparisonOperator.Undefined) // Undefined just draws the error state
{
// Draw the operator using a different pen.
Pen pen = StyleSet.GetPen(OperatorResource);
// Get the correct pen color from the provided outline pen
Color startColor = pen.Color;
Color shapeColor = helper.Pen.Color; // The paint helper has already updated the color, just use it.
bool updateColor;
if (updateColor = (startColor != shapeColor))
{
pen.Color = shapeColor;
}
// Get a clipping rectangle we can draw inside of. This
// gives us a nice vertical clip on the open side of the
// comparator, as well as a region safely inside the shape
// outline.
const double inscribedRectAngle = 1d / 3 * Math.PI; // 60 degrees from center point of shape to shape border.
const float equalsOffsetFactor = .8f;
const double noEqualityPiDivisor = 6d; // 30 degree angle on comparator line
const double withEqualityPiDivisor = 7.5d; // 24 degree angle on comparator line
double inscribedCos = Math.Cos(inscribedRectAngle);
double inscribedSin = Math.Sin(inscribedRectAngle);
double width = bounds.Width;
double height = bounds.Height;
bounds = new RectangleD(
bounds.Left + (1 - inscribedCos) * width / 2,
bounds.Top + (1 - inscribedSin) * height / 2,
inscribedCos * width,
inscribedSin * height);
//width = bounds.Width; // not used below
height = bounds.Height;
boundsF = RectangleD.ToRectangleF(bounds);
bool drawComparator = true;
bool drawEquality = false;
bool slashEquality = false;
float penWidth = pen.Width;
float openSideX = 0f;
float closedSideX = 0f;
switch (comparisonOperator)
{
case ValueComparisonOperator.LessThanOrEqual:
drawEquality = true;
goto case ValueComparisonOperator.LessThan;
case ValueComparisonOperator.LessThan:
openSideX = boundsF.Right;
closedSideX = boundsF.Left + penWidth / 2;
break;
case ValueComparisonOperator.GreaterThanOrEqual:
drawEquality = true;
goto case ValueComparisonOperator.GreaterThan;
case ValueComparisonOperator.GreaterThan:
openSideX = boundsF.Left;
closedSideX = boundsF.Right - penWidth / 2;
break;
case ValueComparisonOperator.Equal:
drawComparator = false;
drawEquality = true;
break;
case ValueComparisonOperator.NotEqual:
drawComparator = false;
drawEquality = true;
slashEquality = true;
break;
}
double halfHeight = height / 2;
double top = bounds.Top;
float middle = (float)(top + halfHeight);
float topTip;
float bottomTip;
if (drawComparator)
{
g.SetClip(boundsF);
// Use a path so that we get a clean join between the top and bottom lines.
float equalsOffset = drawEquality ? penWidth * equalsOffsetFactor : 0f;
double offsetSin = Math.Sin(Math.PI / (drawEquality ? withEqualityPiDivisor : noEqualityPiDivisor));
topTip = (float)(top + halfHeight * (1d - offsetSin));
bottomTip = (float)(top + halfHeight * (1d + offsetSin));
using (GraphicsPath path = new GraphicsPath())
{
path.AddLines(new PointF[] {
new PointF(openSideX, topTip - equalsOffset),
new PointF(closedSideX, middle - equalsOffset),
new PointF(openSideX, bottomTip - equalsOffset)
});
g.DrawPath(pen, path);
}
if (drawEquality)
{
bottomTip += equalsOffset;
g.DrawLine(
pen,
boundsF.Left,
bottomTip,
boundsF.Right,
bottomTip);
}
}
else if (drawEquality)
{
g.SetClip(boundsF);
openSideX = boundsF.Left; // Convenient variables, used for left and right
closedSideX = boundsF.Right;
float equalsOffset = 1.5f * penWidth;
topTip = middle - equalsOffset;
bottomTip = middle + equalsOffset;
g.DrawLine(pen, openSideX, topTip, closedSideX, topTip);
g.DrawLine(pen, openSideX, bottomTip, closedSideX, bottomTip);
if (slashEquality)
{
// Clip tighter so that the top and bottom of the lines
// are clipped horizontally and don't touch the edge lines.
g.ResetClip();
boundsF.Inflate(0f, -penWidth * 1.25f);
g.SetClip(boundsF);
g.DrawLine(pen, openSideX + penWidth, boundsF.Bottom, closedSideX - penWidth, boundsF.Top);
}
}
g.ResetClip();
// Restore the pen color
if (updateColor)
{
pen.Color = startColor;
}
}
}
/// <summary>
/// Copy of <see cref="TextField.DoPaint"/> modified to support the
/// <see cref="IDynamicColorGeometryHost"/> on the parent shape.
/// </summary>
public override void DoPaint(DiagramPaintEventArgs e, ShapeElement parentShape)
{
DiagramClientView clientView = e.View;
if (!HasPendingEdit(parentShape, clientView))
{
if (GetVisible(parentShape))
{
string text = GetDisplayText(parentShape);
StyleSet styleSet = parentShape.StyleSet;
Graphics g = e.Graphics;
RectangleF clip = g.ClipBounds;
clip.Inflate(InflateFocus, InflateFocus);
clip.Height -= InflateFocus;
g.SetClip(clip);
RectangleD shapeBounds = GetBounds(parentShape);
RectangleF shapeRect = RectangleD.ToRectangleF(shapeBounds);
Matrix startTransform = null;
if (!DefaultIsHorizontal)
{
PointF point = PointD.ToPointF(shapeBounds.Center);
startTransform = g.Transform;
Matrix verticalTransform = g.Transform;
verticalTransform.RotateAt(-90f, point);
verticalTransform.Translate(0f, (-point.X / 2f) - shapeRect.X);
g.Transform = verticalTransform;
}
if (parentShape.ClipWhenDrawingFields)
{
RectangleD parentBounds = parentShape.BoundingBox;
shapeRect.Intersect(new RectangleF(0f, 0f, (float)parentBounds.Width, (float)parentBounds.Height));
}
if (FillBackground)
{
Color startColor = Color.White;
Brush brush = GetBackgroundBrush(clientView, parentShape, ref startColor);
g.FillRectangle(brush, shapeRect);
SolidBrush solidBrush = brush as SolidBrush;
if (solidBrush != null)
{
solidBrush.Color = startColor;
}
}
if (DrawBorder)
{
Color oldColor = Color.White;
Pen pen = GetPen(clientView, parentShape, ref oldColor);
GeometryUtility.SafeDrawRectangle(g, pen, shapeRect.X, shapeRect.Y, shapeRect.Width, shapeRect.Height);
pen.Color = oldColor;
}
if (text.Length > 0x0)
{
using (Font font = GetFont(parentShape))
{
// Note that this ignores the base GetTextBrush, which is trivial
// and has no overrides. Note that we follow the convention used with
// the base and do not update luminosity on the text.
StyleSetResourceId textBrushId = GetTextBrushId(clientView, parentShape);
Brush textBrush = styleSet.GetBrush(textBrushId);
Color restoreTextColor = Color.Empty;
IDynamicColorGeometryHost dynamicColors = parentShape as IDynamicColorGeometryHost;
if (dynamicColors != null)
{
restoreTextColor = dynamicColors.UpdateDynamicColor(textBrushId, textBrush);
}
g.DrawString(text, font, textBrush, shapeRect, GetStringFormat(parentShape));
SolidBrush solidTextBrush;
if (!restoreTextColor.IsEmpty &&
null != (solidTextBrush = textBrush as SolidBrush))
{
solidTextBrush.Color = restoreTextColor;
}
}
}
if (HasFocusedAppearance(parentShape, clientView))
{
// Note that the base makes a copy of shapeRect and
// assymetrically modifies the focus rectangle. I don't
// think this adds anything and gives focus floating shapes a
// focus rectangle that arbitrarily overlaps nearby shapes.
//RectangleF focusRect = shapeRect;
//focusRect.Inflate(0f, InflateFocus);
//focusRect.Height -= InflateFocus;
//GeometryUtility.SafeDrawRectangle(g, styleSet.GetPen(DiagramPens.FocusIndicatorBackground), focusRect.X, focusRect.Y, focusRect.Width, focusRect.Height);
//GeometryUtility.SafeDrawRectangle(g, styleSet.GetPen(DiagramPens.FocusIndicator), focusRect.X, focusRect.Y, focusRect.Width, focusRect.Height);
// UNDONE: The bottom line is drawing clipped. The original code has the same problem
// with both the top and bottom lines. This appears to be an issue with the Center
// alignment on the default focus indicator pens.
shapeRect.Inflate(0f, TextFocusTopPadding);
shapeRect.Height -= TextFocusTopPadding - TextFocusBottomPadding;
GeometryUtility.SafeDrawRectangle(g, styleSet.GetPen(DiagramPens.FocusIndicatorBackground), shapeRect.X, shapeRect.Y, shapeRect.Width, shapeRect.Height);
GeometryUtility.SafeDrawRectangle(g, styleSet.GetPen(DiagramPens.FocusIndicator), shapeRect.X, shapeRect.Y, shapeRect.Width, shapeRect.Height);
}
if (startTransform != null)
{
g.Transform = startTransform;
}
}
}
}