public static void Run()
{
// ExStart:1
// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_WorkingWithTransparency();
// Create new XPS Document
XpsDocument doc = new XpsDocument();
// Just to demonstrate transparency
doc.AddPath(doc.CreatePathGeometry("M120,0 H400 v1000 H120")).Fill = doc.CreateSolidColorBrush(Color.Gray);
doc.AddPath(doc.CreatePathGeometry("M300,120 h600 V420 h-600")).Fill = doc.CreateSolidColorBrush(Color.Gray);
// Create path with closed rectangle geometry
XpsPath path1 = doc.CreatePath(doc.CreatePathGeometry("M20,20 h200 v200 h-200 z"));
// Set blue solid brush to fill path1
path1.Fill = doc.CreateSolidColorBrush(Color.Blue);
// Add it to the current page
XpsPath path2 = doc.Add(path1);
// path1 and path2 are the same as soon as path1 hasn't been placed inside any other element
// (which means that path1 had no parent element).
// Because of that rectangle's color on the page effectively turns to green
path2.Fill = doc.CreateSolidColorBrush(Color.Green);
// Now add path2 once again. Now path2 has parent. So path3 won't be the same as path2.
// Thus a new rectangle is painted on the page ...
XpsPath path3 = doc.Add(path2);
// ... and we shift it 300 units lower ...
path3.RenderTransform = doc.CreateMatrix(1, 0, 0, 1, 0, 300);
// ... and set red solid brush to fill it
path3.Fill = doc.CreateSolidColorBrush(Color.Red);
// Create new path4 with path2's geometry ...
XpsPath path4 = doc.AddPath(path2.Data);
// ... shift it 300 units to the right ...
path4.RenderTransform = doc.CreateMatrix(1, 0, 0, 1, 300, 0);
// ... and set blue solid fill
path4.Fill = doc.CreateSolidColorBrush(Color.Blue);
// Add path4 once again.
XpsPath path5 = doc.Add(path4);
// path4 and path5 are not the same again ...
// (move path5 300 units lower)
path5.RenderTransform = path5.RenderTransform.Clone(); // to disconnect RenderTransform value from path4 (see next comment about Fill property)
path5.RenderTransform.Translate(0, 300);
// ... but if we set the opacity of Fill property, it will take effect on both path5 and path4
// because brush is a complex property value which remains the same for path5 and path4
path5.Fill.Opacity = 0.8f;
// Create new path6 with path2's geometry ...
XpsPath path6 = doc.AddPath(path2.Data);
// ... shift it 600 units to the right ...
path6.RenderTransform = doc.CreateMatrix(1, 0, 0, 1, 600, 0);
// ... and set yellow solid fill
path6.Fill = doc.CreateSolidColorBrush(Color.Yellow);
// Now add path6's clone ...
XpsPath path7 = doc.Add(path6.Clone());
// (move path5 300 units lower)
path7.RenderTransform = path7.RenderTransform.Clone();
path7.RenderTransform.Translate(0, 300);
// ... and set opacity for path7
path7.Fill.Opacity = 0.8f;
// Now opacity effects independantly as soon as property values are cloned along with the element
// The following code block is equivalent to the previous one.
// Add path6 itself. path6 and path7 are not the same. Although their Fill property values are the same
//XpsPath path7 = doc.Add(path6);
//path7.RenderTransform = path7.RenderTransform.Clone();
//path7.RenderTransform.Translate(0, 300);
// To "disconnect" path7's Fill property from path6's Fill property reassign it to its clone (or path6's Fill clone)
//path7.Fill = ((XpsSolidColorBrush)path7.Fill).Clone();
//path7.Fill.Opacity = 0.8f;
// Save resultant XPS document
doc.Save(dataDir + "WorkingWithTransparency_out.xps");
// ExEnd:1
}
