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|
public class Report : FrameworkElement
{
public DataTemplate PageHeaderTemplate
{
get { return (DataTemplate)GetValue(PageHeaderTemplateProperty); }
set { SetValue(PageHeaderTemplateProperty, value); }
}
public static readonly DependencyProperty PageHeaderTemplateProperty =
DependencyProperty.Register("PageHeaderTemplate", typeof(DataTemplate), typeof(Report), new PropertyMetadata(null));
public DataTemplate PageFooterTemplate
{
get { return (DataTemplate)GetValue(PageFooterTemplateProperty); }
set { SetValue(PageFooterTemplateProperty, value); }
}
public static readonly DependencyProperty PageFooterTemplateProperty =
DependencyProperty.Register("PageFooterTemplate", typeof(DataTemplate), typeof(Report), new PropertyMetadata(null));
public DataTemplate ItemTemplate
{
get { return (DataTemplate)GetValue(ItemTemplateProperty); }
set { SetValue(ItemTemplateProperty, value); }
}
public static readonly DependencyProperty ItemTemplateProperty =
DependencyProperty.Register("ItemTemplate", typeof(DataTemplate), typeof(Report), new PropertyMetadata(null));
public DataTemplate ReportFooterTemplate
{
get { return (DataTemplate)GetValue(ReportFooterTemplateProperty); }
set { SetValue(ReportFooterTemplateProperty, value); }
}
public static readonly DependencyProperty ReportFooterTemplateProperty =
DependencyProperty.Register("ReportFooterTemplate", typeof(DataTemplate), typeof(Report), new PropertyMetadata(null));
public IEnumerable ItemsSource
{
get { return (IEnumerable)GetValue(ItemsSourceProperty); }
set { SetValue(ItemsSourceProperty, value); }
}
public static readonly DependencyProperty ItemsSourceProperty =
DependencyProperty.Register("ItemsSource", typeof(IEnumerable), typeof(Report), new PropertyMetadata(null));
public string Title
{
get { return (string)GetValue(TitleProperty); }
set { SetValue(TitleProperty, value); }
}
public static readonly DependencyProperty TitleProperty =
DependencyProperty.Register("Title", typeof(string), typeof(Report), new PropertyMetadata("Report"));
//#region Columns Visibility
public Visibility DateVisibility
{
get { return (Visibility)GetValue(DateVisibilityProperty); }
set { SetValue(DateVisibilityProperty, value); }
}
public static readonly DependencyProperty DateVisibilityProperty =
DependencyProperty.Register("DateVisibility", typeof(Visibility), typeof(Report), new PropertyMetadata(null));
public int CurrentPageNumber
{
get { return (int)GetValue(CurrentPageNumberProperty); }
private set { SetValue(CurrentPageNumberProperty, value); }
}
public static readonly DependencyProperty CurrentPageNumberProperty =
DependencyProperty.Register("CurrentPageNumber", typeof(int), typeof(Report), new PropertyMetadata(0));
public int TotalPageCount
{
get { return (int)GetValue(TotalPageCountProperty); }
private set { SetValue(TotalPageCountProperty, value); }
}
public static readonly DependencyProperty TotalPageCountProperty =
DependencyProperty.Register("TotalPageCount", typeof(int), typeof(Report), new PropertyMetadata(0));
private PrintDocument _printDocument = new PrintDocument();
public PrintDocument PrintDocument
{
get { return _printDocument; }
}
public event EventHandler EndPrint;
protected void OnEndPrint(EventArgs args)
{
if (EndPrint != null)
EndPrint(this, args);
}
public event EventHandler BeginPrint;
protected void OnBeginPrint(EventArgs args)
{
if (BeginPrint != null)
BeginPrint(this, args);
}
public event EventHandler EndBuildReport;
protected void OnEndBuildReport(EventArgs args)
{
if (EndBuildReport != null)
EndBuildReport(this, args);
}
public event EventHandler BeginBuildReport;
protected void OnBeginBuildReport(EventArgs args)
{
if (BeginBuildReport != null)
BeginBuildReport(this, args);
}
public event EventHandler EndBuildReportItem;
protected void OnEndBuildReportItem(EventArgs args)
{
if (EndBuildReportItem != null)
EndBuildReportItem(this, args);
}
public event EventHandler<PrintingEventArgs> BeginBuildReportItem;
protected void OnBeginBuildReportItem(PrintingEventArgs args)
{
if (BeginBuildReportItem != null)
BeginBuildReportItem(this, args);
}
public event EventHandler<PrintingEventArgs> BeginBuildReportFooter;
protected void OnBeginBuildReportFooter(PrintingEventArgs args)
{
if (BeginBuildReportFooter != null)
BeginBuildReportFooter(this, args);
}
private int _pageTreeIndex = 0;
private void PrintDocumentPrintPageHandler(object sender, PrintPageEventArgs e)
{
if (_pageTreeIndex == 0)
{
BuildReport(e.PrintableArea);
TotalPageCount = _pageTrees.Count;
CurrentPageNumber = 0;
}
if (_pageTrees.Count > 0)
{
CurrentPageNumber++;
e.PageVisual = _pageTrees[_pageTreeIndex];
}
e.HasMorePages = _pageTreeIndex < _pageTrees.Count - 1;
_pageTreeIndex++;
}
private void PrintDocumentBeginPrintHandler(object sender, BeginPrintEventArgs e)
{
OnBeginPrint(EventArgs.Empty);
}
private void PrintDocumentEndPrintHandler(object sender, EndPrintEventArgs e)
{
OnEndPrint(EventArgs.Empty);
// remove event handlers so we don't have any references hanging around
_printDocument.PrintPage -= PrintDocumentPrintPageHandler;
_printDocument.BeginPrint -= PrintDocumentBeginPrintHandler;
_printDocument.EndPrint -= PrintDocumentEndPrintHandler;
}
public void Print()
{
Print(null);
}
public void Print(PrinterFallbackSettings settings)
{
CurrentPageNumber = 0;
_pageTreeIndex = 0;
_printDocument.PrintPage += PrintDocumentPrintPageHandler;
_printDocument.BeginPrint += PrintDocumentBeginPrintHandler;
_printDocument.EndPrint += PrintDocumentEndPrintHandler;
if (settings != null)
_printDocument.Print(Title.Replace(" ", ""), settings);
else
_printDocument.Print(Title.Replace(" ", ""));
}
private List<UIElement> _pageTrees = new List<UIElement>();
// Pre-calculates pages. This allows for total page count
// as well as better handling of page breaks, and eventual
// inclusion of groups and whatnot. If this takes too long, though
// it'll exceed the timeout and make the printing fail in a
// sandboxed silverlight application. Alternative would be to make
// printing a two-step operation: First, build report, Second, user
// clicks button to do the actual printing. That approach
// introduces issues with data changing in-between the steps.
private void BuildReport(Size printableArea)
{
_pageTrees.Clear();
CurrentPageNumber = 0;
OnBeginBuildReport(EventArgs.Empty);
if (ItemsSource == null)
return;
IEnumerable reportItems = ItemsSource;
IEnumerator reportItemsEnumerator = reportItems.GetEnumerator();
reportItemsEnumerator.Reset();
StackPanel itemsPanel = null;
Grid pagePanel = null;
Size itemsPanelMaxSize = new Size();
// create first page
pagePanel = GetNewPage(printableArea, out itemsPanel, out itemsPanelMaxSize);
// add the items
while (reportItemsEnumerator.MoveNext())
{
object currentItem = reportItemsEnumerator.Current;
PrintingEventArgs args = new PrintingEventArgs();
args.DataContext = currentItem;
OnBeginBuildReportItem(args);
// create row. Set data context.
FrameworkElement row = ItemTemplate.LoadContent() as FrameworkElement;
row.DataContext = args.DataContext;
// ContentPresenter approach was tried to see if it helped resolve Run
// inlines with binding. No go.
//ContentPresenter row = new ContentPresenter();
//row.ContentTemplate = ItemTemplate;
//row.Content = currentItem;
row.Measure(printableArea);
// create a new page if we're out of room here
if (row.DesiredSize.Height + itemsPanel.DesiredSize.Height > itemsPanelMaxSize.Height)
{
pagePanel = GetNewPage(printableArea, out itemsPanel, out itemsPanelMaxSize);
}
itemsPanel.Children.Add(row);
itemsPanel.Measure(printableArea);
}
// create report footer. This goes at the very end of the report and typically
// includes totals and other summary information
if (ReportFooterTemplate != null)
{
PrintingEventArgs reportFooterEventArgs = new PrintingEventArgs();
reportFooterEventArgs.DataContext = this;
OnBeginBuildReportFooter(reportFooterEventArgs);
FrameworkElement reportFooter = ReportFooterTemplate.LoadContent() as FrameworkElement;
if (reportFooter != null)
{
reportFooter.DataContext = reportFooterEventArgs.DataContext;
reportFooter.Measure(printableArea);
// fit the footer into the report
if (reportFooter.DesiredSize.Height + itemsPanel.DesiredSize.Height > itemsPanelMaxSize.Height)
{
pagePanel = GetNewPage(printableArea, out itemsPanel, out itemsPanelMaxSize);
}
itemsPanel.Children.Add(reportFooter);
}
}
OnEndBuildReport(EventArgs.Empty);
}
private Grid GetNewPage(Size printableArea, out StackPanel itemsPanel, out Size itemsPanelMaxSize)
{
const int HeaderGridRowNumber = 0;
const int BodyGridRowNumber = 1;
const int FooterGridRowNumber = 2;
CurrentPageNumber++;
Grid pagePanel = new Grid();
RowDefinition headerRow = new RowDefinition();
headerRow.Height = GridLength.Auto;
pagePanel.Background = new SolidColorBrush { Color = Colors.White };
RowDefinition itemsRow = new RowDefinition();
itemsRow.Height = new GridLength(1, GridUnitType.Star);
RowDefinition footerRow = new RowDefinition();
footerRow.Height = GridLength.Auto;
pagePanel.RowDefinitions.Add(headerRow);
pagePanel.RowDefinitions.Add(itemsRow);
pagePanel.RowDefinitions.Add(footerRow);
// page header. Typically includes column headers and whatnot
double headerDesiredHeight = 0;
if (PageHeaderTemplate != null)
{
FrameworkElement header = PageHeaderTemplate.LoadContent() as FrameworkElement;
header.DataContext = this;
Grid.SetRow(header, HeaderGridRowNumber);
pagePanel.Children.Add(header);
header.Measure(new Size(printableArea.Width, printableArea.Height));
headerDesiredHeight = header.DesiredSize.Height;
}
// create body to fit in between
itemsPanel = new StackPanel();
itemsPanel.Orientation = Orientation.Vertical;
itemsPanel.HorizontalAlignment = HorizontalAlignment.Stretch;
itemsPanel.VerticalAlignment = VerticalAlignment.Top;
itemsPanel.Background = new SolidColorBrush { Color = Colors.White };
Grid.SetRow(itemsPanel, BodyGridRowNumber);
pagePanel.Children.Add(itemsPanel);
// create page footer. Typically includes the page number
double footerDesiredHeight = 0;
if (PageFooterTemplate != null)
{
FrameworkElement footer = PageFooterTemplate.LoadContent() as FrameworkElement;
footer.DataContext = this;
Grid.SetRow(footer, FooterGridRowNumber);
pagePanel.Children.Add(footer);
footer.Measure(new Size(printableArea.Width, printableArea.Height));
footerDesiredHeight = footer.DesiredSize.Height;
}
itemsPanelMaxSize = new Size(printableArea.Width, printableArea.Height - footerDesiredHeight - headerDesiredHeight);
_pageTrees.Add(pagePanel);
return pagePanel;
}
} |
Problème de RelativeSource DataBinding
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