private void DrawGuideLine(DrawingContext dc, BasicStyleCache cache, GuidePoint point0, GuidePoint point1)
{
var gs = new GuidelineSet(
new double[] { point0.X + cache.HalfThickness, point1.X + cache.HalfThickness },
new double[] { point0.Y + cache.HalfThickness, point1.Y + cache.HalfThickness });
gs.Freeze();
dc.PushGuidelineSet(gs);
dc.DrawLine(cache.StrokePen, new Point(point0.X, point0.Y), new Point(point1.X, point1.Y));
dc.Pop();
}
private void DrawImage(DrawingContext dc, Rect rect)
{
ImageSource source = Image;
if (source != null)
{
double opacity = ImageOpacity;
if (IsNineGrid)
{
// make sure we don't step out of borders
Thickness margin = Clamp(ImageMargin, new Size(source.Width, source.Height), rect.Size);
double[] xGuidelines = { 0, margin.Left, rect.Width - margin.Right, rect.Width };
double[] yGuidelines = { 0, margin.Top, rect.Height - margin.Bottom, rect.Height };
GuidelineSet guidelineSet = new GuidelineSet(xGuidelines, yGuidelines);
guidelineSet.Freeze();
dc.PushGuidelineSet(guidelineSet);
double[] vx = { 0D, margin.Left / source.Width, (source.Width - margin.Right) / source.Width, 1D };
double[] vy = { 0D, margin.Top / source.Height, (source.Height - margin.Bottom) / source.Height, 1D };
double[] x = { rect.Left, rect.Left + margin.Left, rect.Right - margin.Right, rect.Right };
double[] y = { rect.Top, rect.Top + margin.Top, rect.Bottom - margin.Bottom, rect.Bottom };
for (int i = 0; i < 3; ++i)
{
for (int j = 0; j < 3; ++j)
{
var brush = new ImageBrush(source)
{
Opacity = opacity,
Viewbox = new Rect(vx[j], vy[i], Math.Max(0D, (vx[j + 1] - vx[j])),
Math.Max(0D, (vy[i + 1] - vy[i])))
};
dc.DrawRectangle(brush, null,
new Rect(x[j], y[i], Math.Max(0D, (x[j + 1] - x[j])), Math.Max(0D, (y[i + 1] - y[i]))));
}
}
dc.Pop();
}
else
{
var brush = new ImageBrush(source) { Opacity = opacity };
dc.DrawRectangle(brush, null, rect);
}
}
}
/// <summary>
/// PushGuidelineY2 -
/// Explicitly push a pair of horizontal guidelines.
/// </summary>
/// <param name="leadingCoordinate"> The coordinate of leading guideline. </param>
/// <param name="offsetToDrivenCoordinate">
/// The offset from leading guideline to driven guideline.
/// </param>
internal override void PushGuidelineY2(
Double leadingCoordinate,
Double offsetToDrivenCoordinate)
{
#if DEBUG
MediaTrace.DrawingContextOp.Trace("PushGuidelineY2");
#endif
//
// Verify that parameters & state are valid
//
VerifyApiNonstructuralChange();
//
// Instantiate a new drawing group and set it as the _currentDrawingGroup
//
PushNewDrawingGroup();
//
// Convert compact record to generic GuidelineSet.
//
GuidelineSet guidelineCollection = new GuidelineSet(
null, // x guidelines
new double[]
{
leadingCoordinate,
offsetToDrivenCoordinate
}, // y guidelines
true // dynamic flag
);
guidelineCollection.Freeze();
//
// Set the guideline collection on the new DrawingGroup
//
_currentDrawingGroup.GuidelineSet = guidelineCollection;
}
