本文整理汇总了C#中Xwt.Drawing.Context.TransformPoints方法的典型用法代码示例。如果您正苦于以下问题：C# Context.TransformPoints方法的具体用法？C# Context.TransformPoints怎么用？C# Context.TransformPoints使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Xwt.Drawing.Context的用法示例。
在下文中一共展示了Context.TransformPoints方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: DrawTick
//.........这里部分代码省略.........
else {
// start location.
textCenterX = tickStart.X;
textCenterY = tickStart.Y;
// offset due to text box size.
textCenterX -= 0.5 * x1 * textSize.Width;
textCenterY -= 0.5 * y1 * textSize.Height;
// bring text away from the axis a little bit.
textCenterX -= x1*(2.0+FontScale);
textCenterY -= y1*(2.0+FontScale);
}
// If tick text is angled..
if (TickTextAngle != 0) {
// determine the point we want to rotate text about.
Point textScaledTickVector = new Point (
TickScale * x1 * (textSize.Height/2),
TickScale * y1 * (textSize.Height/2) );
Point rotatePoint;
if (TickTextNextToAxis) {
rotatePoint = new Point (
tickStart.X - textScaledTickVector.X,
tickStart.Y - textScaledTickVector.Y);
}
else {
rotatePoint = new Point (
tickEnd.X + textScaledTickVector.X,
tickEnd.Y + textScaledTickVector.Y);
}
double actualAngle;
if (FlipTickText) {
double radAngle = TickTextAngle * Math.PI / 180;
rotatePoint.X += textSize.Width * Math.Cos (radAngle);
rotatePoint.Y += textSize.Width * Math.Sin (radAngle);
actualAngle = TickTextAngle + 180;
}
else {
actualAngle = TickTextAngle;
}
ctx.Save ();
ctx.Translate (rotatePoint.X, rotatePoint.Y);
ctx.Rotate (actualAngle);
Point [] recPoints = new Point [2];
recPoints[0] = new Point (0.0, -textSize.Height/2);
recPoints[1] = new Point (textSize.Width, textSize.Height);
ctx.TransformPoints (recPoints);
double t_x1 = Math.Min (recPoints[0].X, recPoints[1].X);
double t_x2 = Math.Max (recPoints[0].X, recPoints[1].X);
double t_y1 = Math.Min (recPoints[0].Y, recPoints[1].Y);
double t_y2 = Math.Max (recPoints[0].Y, recPoints[1].Y);
boundingBox = Rectangle.Union (boundingBox, new Rectangle (t_x1, t_y1, (t_x2-t_x1), (t_y2-t_y1)));
ctx.DrawTextLayout (layout, 0, -textSize.Height/2);
t_x2 -= tickStart.X;
t_y2 -= tickStart.Y;
t_x2 *= 1.25;
t_y2 *= 1.25;
labelOffset = new Point (t_x2, t_y2);
ctx.Restore ();
//ctx.Rectangle (boundingBox.X, boundingBox.Y, boundingBox.Width, boundingBox.Height);
//ctx.Stroke ();
}
else {
double bx1 = (textCenterX - textSize.Width/2);
double by1 = (textCenterY - textSize.Height/2);
double bx2 = textSize.Width;
double by2 = textSize.Height;
Rectangle drawRect = new Rectangle (bx1, by1, bx2, by2);
// ctx.Rectangle (drawRect);
boundingBox = Rectangle.Union (boundingBox, drawRect);
// ctx.Rectangle (boundingBox);
ctx.DrawTextLayout (layout, bx1, by1);
textCenterX -= tickStart.X;
textCenterY -= tickStart.Y;
textCenterX *= 2.3;
textCenterY *= 2.3;
labelOffset = new Point (textCenterX, textCenterY);
}
}
}示例2: DrawLabel
/// <summary>
/// Draw the Axis Label
/// </summary>
/// <param name="ctx>The Drawing Context with which to draw.</param>
/// <param name="offset">offset from axis. Should be calculated so as to make sure axis label misses tick labels.</param>
/// <param name="axisPhysicalMin">The physical position corresponding to the world minimum of the axis.</param>
/// <param name="axisPhysicalMax">The physical position corresponding to the world maximum of the axis.</param>
/// <returns>boxed Rectangle indicating bounding box of label. null if no label printed.</returns>
public object DrawLabel(Context ctx, Point offset, Point axisPhysicalMin, Point axisPhysicalMax)
{
if (Label != "") {
// first calculate any extra offset for axis label spacing.
double extraOffsetAmount = LabelOffset;
extraOffsetAmount += 2; // empirically determed - text was too close to axis before this.
if (AutoScaleText && LabelOffsetScaled) {
extraOffsetAmount *= FontScale;
}
// now extend offset.
double offsetLength = Math.Sqrt (offset.X*offset.X + offset.Y*offset.Y);
if (offsetLength > 0.01) {
double x_component = offset.X / offsetLength;
double y_component = offset.Y / offsetLength;
x_component *= extraOffsetAmount;
y_component *= extraOffsetAmount;
if (LabelOffsetAbsolute) {
offset.X = x_component;
offset.Y = y_component;
}
else {
offset.X += x_component;
offset.Y += y_component;
}
}
// determine angle of axis in degrees
double theta = Math.Atan2 (
axisPhysicalMax.Y - axisPhysicalMin.Y,
axisPhysicalMax.X - axisPhysicalMin.X);
theta = theta * 180.0 / Math.PI;
Point average = new Point (
(axisPhysicalMax.X + axisPhysicalMin.X)/2,
(axisPhysicalMax.Y + axisPhysicalMin.Y)/2);
ctx.Save ();
ctx.Translate (average.X + offset.X , average.Y + offset.Y); // this is done last.
ctx.Rotate (theta); // this is done first.
TextLayout layout = new TextLayout ();
layout.Font = labelFontScaled;
layout.Text = Label;
Size labelSize = layout.GetSize ();
//Draw label centered around zero.
ctx.DrawTextLayout (layout, -labelSize.Width/2, -labelSize.Height/2);
// now work out physical bounds of Rotated and Translated label.
Point [] recPoints = new Point [2];
recPoints[0] = new Point (-labelSize.Width/2, -labelSize.Height/2);
recPoints[1] = new Point ( labelSize.Width/2, labelSize.Height/2);
ctx.TransformPoints (recPoints);
double x1 = Math.Min (recPoints[0].X, recPoints[1].X);
double x2 = Math.Max (recPoints[0].X, recPoints[1].X);
double y1 = Math.Min (recPoints[0].Y, recPoints[1].Y);
double y2 = Math.Max (recPoints[0].Y, recPoints[1].Y);
ctx.Restore ();
// and return label bounding box.
return new Rectangle (x1, y1, (x2-x1), (y2-y1));
}
return null;
}