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Printing Events

You can customize the print output through the PrintElementFormatting and PrintElementPaint events. PrintElementFormatting provides you with a print element which has style properties available so you can customize it as you see fit. The PrintElementPaint gives you direct access to the graphical context and allows you to directly draw to the print output.

PrintElementFormatting

The following example demonstrates how you can use the PrintContext property to determine what element is being printed and to change the styling accordingly.

private void radGanttView1_PrintElementFormatting(object sender, GanttViewPrintElementFormattingEventArgs e)
{
    switch (e.PrintContext)
    {
        case GanttViewPrintElementContext.HeaderCell:
            e.PrintElement.BackColor = Color.LightBlue;
            break;
        case GanttViewPrintElementContext.DataCell:
            e.PrintElement.BorderColor = Color.Cyan;
            break;
        case GanttViewPrintElementContext.TaskElement:
            e.PrintElement.ForeColor = Color.Green;
            break;
        case GanttViewPrintElementContext.SummaryTaskElement:
            e.PrintElement.BorderColor = Color.Red;
            break;
        case GanttViewPrintElementContext.MilestoneElement:
            e.PrintElement.BackColor = Color.Orange;
            break;
        case GanttViewPrintElementContext.TimelineUpperElement:
            e.PrintElement.BackColor = Color.LightCoral;
            break;
        case GanttViewPrintElementContext.TimelineBottomElement:
            e.PrintElement.BackColor = Color.LightGray;
            break;
    }
}

Private Sub GanttViewPrintElementFormattingEventArgs(sender As Object, e As GanttViewPrintElementFormattingEventArgs)
    Select Case e.PrintContext
        Case GanttViewPrintElementContext.HeaderCell
            e.PrintElement.BackColor = Color.LightBlue
            Exit Select
        Case GanttViewPrintElementContext.DataCell
            e.PrintElement.BorderColor = Color.Cyan
            Exit Select
        Case GanttViewPrintElementContext.TaskElement
            e.PrintElement.ForeColor = Color.Green
            Exit Select
        Case GanttViewPrintElementContext.SummaryTaskElement
            e.PrintElement.BorderColor = Color.Red
            Exit Select
        Case GanttViewPrintElementContext.MilestoneElement
            e.PrintElement.BackColor = Color.Orange
            Exit Select
        Case GanttViewPrintElementContext.TimelineUpperElement
            e.PrintElement.BackColor = Color.LightCoral
            Exit Select
        Case GanttViewPrintElementContext.TimelineBottomElement
            e.PrintElement.BackColor = Color.LightGray
            Exit Select
    End Select
End Sub

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PrintElementPaint

This example demonstrates how you can paint the text of summary items next to the printed graphical representation.

private void radGanttView1_PrintElementPaint(object sender, GanttViewPrintElementPaintEventArgs e)
{
    if (e.PrintContext == GanttViewPrintElementContext.SummaryTaskElement)
    {
        GanttViewDataItem dataItem = e.DataContext as GanttViewDataItem;
        SizeF textSize = e.Graphics.MeasureString(dataItem.Title, this.radGanttView1.Font);
        RectangleF rect = new RectangleF(e.Rectangle.Right + 10, e.Rectangle.Y, textSize.Width, e.Rectangle.Height);
        e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixelGridFit;
        e.Graphics.DrawString(dataItem.Title, this.radGanttView1.Font, Brushes.Black, rect);
    }
}

Private Sub radGanttView1_PrintElementPaint(sender As Object, e As GanttViewPrintElementPaintEventArgs)
    If e.PrintContext = GanttViewPrintElementContext.SummaryTaskElement Then
        Dim dataItem As GanttViewDataItem = TryCast(e.DataContext, GanttViewDataItem)
        Dim textSize As SizeF = e.Graphics.MeasureString(dataItem.Title, Me.radGanttView1.Font)
        Dim rect As New RectangleF(e.Rectangle.Right + 10, e.Rectangle.Y, textSize.Width, e.Rectangle.Height)
        e.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.SingleBitPerPixelGridFit
        e.Graphics.DrawString(dataItem.Title, Me.radGanttView1.Font, Brushes.Black, rect)
    End If
End Sub

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