Below are some examples showing the use of relative positioning of objects to arrange an image and a text ("myImage" in those samples is an object of type System.Drawing.Image declared elsewhere in code):
This code places the text below the image simply adding one object after another into the regular block flow:
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Dim doc as New C1PrintDocument
Dim rt as New RenderText("test")
Dim ri as New RenderImage(myImage)
Dim ra As New RenderArea()
ra.Children.Add(ri)
ra.Children.Add(rt)
doc.Body.Children.Add(ra)
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C1PrintDocument doc = new C1PrintDocument();
RenderText rt = new RenderText("test");
RenderImage ri = new RenderImage(myImage);
RenderArea ra = new RenderArea();
ra.Children.Add(ri);
ra.Children.Add(rt);
doc.Body.Children.Add(ra);
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This code produces equivalent result (text below image) while the children are added to the area in inverse order (because both objects have non-auto coordinates specified explicitly, neither is inserted into the block flow):
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Dim doc as New C1PrintDocument
Dim rt as New RenderText("test")
Dim ri as New RenderImage(myImage)
Dim ra As New RenderArea()
' place image at the top of the parent:
ri.Y = 0
' place text below next sibling:
rt.Y = "next.bottom"
' auto-size text width:
rt.Width = Unit.Auto
ra.Children.Add(ri)
ra.Children.Add(rt)
doc.Body.Children.Add(ra)
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C1PrintDocument doc = new C1PrintDocument();
RenderText rt = new RenderText("test");
RenderImage ri = new RenderImage(myImage);
RenderArea ra = new RenderArea();
// place image at the top of the parent:
ri.Y = 0;
// place text below next sibling:
rt.Y = "next.bottom";
// auto-size text width:
rt.Width = Unit.Auto;
ra.Children.Add(rt);
ra.Children.Add(ri);
doc.Body.Children.Add(ra);
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The following code inserts the image into the regular block flow, while putting the text to the right of the image, centering it vertically relative to the image:
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Dim doc as New C1PrintDocument
Dim rt as New RenderText("test")
Dim ri as New RenderImage(myImage)
Dim ra As New RenderArea()
ra.Children.Add(ri)
rt.Width = Unit.Auto
' add text after the image:
ra.Children.Add(rt)
rt.X = "prev.right"
rt.Y = "prev.height/2-self.height/2"
doc.Body.Children.Add(ra)
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C1PrintDocument doc = new C1PrintDocument();
RenderText rt = new RenderText("test");
RenderImage ri = new RenderImage(myImage);
RenderArea ra = new RenderArea();
ra.Children.Add(ri);
rt.Width = Unit.Auto;
// add text after the image:
ra.Children.Add(rt);
rt.X = "prev.right";
rt.Y = "prev.height/2-self.height/2";
doc.Body.Children.Add(ra);
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This code also places the text to the right of the image, centered vertically - but uses the RenderObject.Name in the positioning expressions rather than relative id "prev", Also, the text is shifted 2mm to the right, demonstrating the use of absolute lengths in expressions:
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Dim doc as New C1PrintDocument
Dim rt as New RenderText("test")
Dim ri as New RenderImage(myImage)
Dim ra As New RenderArea()
ri.Name = "myImage"
rt.Width = "auto"
rt.X = "myImage.right+2mm"
rt.Y = "myImage.height/2-self.height/2"
ra.Children.Add(ri)
ra.Children.Add(rt)
doc.Body.Children.Add(ra)
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C1PrintDocument doc = new C1PrintDocument();
RenderText rt = new RenderText("test");
RenderImage ri = new RenderImage(myImage);
RenderArea ra = new RenderArea();
ri.Name = "myImage";
rt.Width = "auto";
rt.X = "myImage.right+2mm";
rt.Y = "myImage.height/2-self.height/2";
ra.Children.Add(ri);
ra.Children.Add(rt);
doc.Body.Children.Add(ra);
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The code below modifies the same example so that the text is shifted to the right at least 6cm, using the built-in Max functions:
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Dim doc as New C1PrintDocument
Dim rt as New RenderText("test")
Dim ri as New RenderImage(myImage)
Dim ra As New RenderArea()
ri.Name = "myImage"
rt.Width = "auto"
rt.X = "Max(myImage.right+2mm,6cm)"
rt.Y = "myImage.height/2-self.height/2"
ra.Children.Add(ri)
ra.Children.Add(rt)
doc.Body.Children.Add(ra)
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C1PrintDocument doc = new C1PrintDocument();
RenderText rt = new RenderText("test");
RenderImage ri = new RenderImage(myImage);
RenderArea ra = new RenderArea();
ri.Name = "myImage";
rt.Width = "auto";
rt.X = "Max(myImage.right+2mm,6cm)";
rt.Y = "myImage.height/2-self.height/2";
ra.Children.Add(ri);
ra.Children.Add(rt);
doc.Body.Children.Add(ra);
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The following code snippet aligns image to the right side of the page (utilizing the default value for the width of a render area - parent width), while the text is left-aligned, and centered vertically relative to the image:
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Dim doc as New C1PrintDocument
Dim rt as New RenderText("test")
Dim ri as New RenderImage(myImage)
Dim ra As New RenderArea()
ri.Name = "myImage"
' right-align image:
ri.X = "parent.right-width"
' left-align text:
rt.X = "0"
rt.Y = "myImage.height/2-height/2"
ra.Children.Add(ri)
ra.Children.Add(rt)
doc.Body.Children.Add(ra)
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To write code in C#
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C1PrintDocument doc = new C1PrintDocument();
RenderText rt = new RenderText("test");
RenderImage ri = new RenderImage(myImage);
RenderArea ra = new RenderArea();
ri.Name = "myImage";
// right-align image:
ri.X = "parent.right-width";
// left-align text:
rt.X = "0";
rt.Y = "myImage.height/2-height/2";
ra.Children.Add(ri);
ra.Children.Add(rt);
doc.Body.Children.Add(ra);
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