/// <summary>
/// Returns information needed for exporting multiple pages on one sheet. You normally
/// don't need to use this method, but you can use it to speed up multiple displays.
/// </summary>
/// <returns></returns>
public TImgExportInfo GetFirstPageExportInfo()
{
FRenderer.CreateFontCache();
try
{
using (Bitmap bmp = BitmapConstructor.CreateBitmap(1, 1))
{
using (Graphics imgData = Graphics.FromImage(bmp))
{
IFlxGraphics aCanvas = new GdiPlusGraphics(imgData);
imgData.PageUnit = GraphicsUnit.Point;
FRenderer.SetCanvas(aCanvas);
try
{
return(GetExportInfo(aCanvas));
}
finally
{
FRenderer.SetCanvas(null);
}
}
}
}
finally
{
FRenderer.DisposeFontCache();
}
}
/// <summary>
/// Exports the associated xls workbook to a graphics stream. You need to provide a
/// Graphics object with the correct dimensions. (To get the needed dimensions, use <see cref="GetRealPageSize()"/>
/// </summary>
/// <param name="imgData">Graphics where the image will be stored. Set it to null to skip the page.</param>
/// <param name="exportInfo"> Information needed to export, cached for speed. The first time you call this method (or when you change xls.ActiveSheet), make exportInfo=null</param>
public bool ExportNext(Graphics imgData, ref TImgExportInfo exportInfo)
{
FRenderer.CreateFontCache();
try
{
Bitmap bmp = null;
try
{
if (imgData == null)
{
bmp = BitmapConstructor.CreateBitmap(1, 1);
imgData = Graphics.FromImage(bmp);
imgData.PageUnit = GraphicsUnit.Point;
}
IFlxGraphics aCanvas = new GdiPlusGraphics(imgData);
GraphicsUnit OriginalUnits = imgData.PageUnit;
try
{
imgData.PageUnit = GraphicsUnit.Point;
FRenderer.SetCanvas(aCanvas);
try
{
if (exportInfo == null)
{
exportInfo = GetExportInfo(aCanvas);
}
exportInfo.IncCurrentPage();
if (exportInfo.CurrentPage > exportInfo.TotalPages)
{
return(false);
}
int SaveActiveSheet = Workbook.ActiveSheet;
try
{
Workbook.ActiveSheet = exportInfo.CurrentSheet;
int CurrentLogicalPage = -1;
if (ResetPageNumberOnEachSheet)
{
CurrentLogicalPage = exportInfo.ActiveSheet.FCurrentPage;
}
else
{
CurrentLogicalPage = exportInfo.CurrentPage;
}
TOneImgExportInfo OneResult = exportInfo.ActiveSheet;
if (LastInitSheet != exportInfo.CurrentSheet)
{
TXlsCellRange ra; int p; RectangleF[] r;
FRenderer.InitializePrint(aCanvas, OneResult.PageBounds, OneResult.PageBounds, OneResult.PrintRanges, out r, out p, out ra);
LastInitSheet = exportInfo.CurrentSheet;
}
if (bmp == null)
{
OnBeforePaint(new ImgPaintEventArgs(imgData, CalcPageBounds(exportInfo.ActiveSheet.PageBounds), exportInfo.CurrentPage, exportInfo.ActiveSheet.CurrentPage, exportInfo.TotalPages));
}
FRenderer.GenericPrint(aCanvas, OneResult.PageBounds, OneResult.PrintRanges, CurrentLogicalPage,
OneResult.PaintClipRect, exportInfo.TotalLogicalPages(ResetPageNumberOnEachSheet), bmp == null,
OneResult.PagePrintRange, ref OneResult.FCurrentPrintArea);
aCanvas.ResetClip();
if (bmp == null)
{
OnAfterPaint(new ImgPaintEventArgs(imgData, CalcPageBounds(exportInfo.ActiveSheet.PageBounds), exportInfo.CurrentPage, exportInfo.ActiveSheet.CurrentPage, exportInfo.TotalPages));
}
}
finally
{
Workbook.ActiveSheet = SaveActiveSheet;
}
}
finally
{
FRenderer.SetCanvas(null);
}
}
finally
{
imgData.PageUnit = OriginalUnits;
}
}
finally
{
if (bmp != null)
{
bmp.Dispose();
imgData.Dispose();
}
}
}
finally
{
FRenderer.DisposeFontCache();
}
return(true);
}
/// <summary>
/// Raises the <see cref="PrintDocument.PrintPage"/> event. It is called before a page prints.
/// </summary>
/// <remarks>
/// This method is overridden to print an Excel document.
/// After doing its own work, it will call <see cref="PrintDocument.PrintPage"/> so you can draw your own thing over it.
/// </remarks>
/// <param name="e">A <see cref="PrintPageEventArgs"/> that contains the event data.</param>
protected override void OnPrintPage(PrintPageEventArgs e)
{
// There is a bug in Vs2005 (but not in 2003) where the VisibleClipBounds property does not change with the PageUnit, and it remains the same as when the graphics was created.
// See http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=230594 (VisibleClipBounds does not produce correct results for different PageUnit)
// So, we are going to store the VisibleClipBounds here. It looks like if we do not call e.Graphics.Save, things work fine.
// Other bug in the framework (and this is also in .NET 1.1)
//This code alone in an OnPrintPage event:
/*
* e.Graphics.PageUnit=GraphicsUnit.Inch;
* RectangleF r = e.Graphics.VisibleClipBounds;
* e.Graphics.PageUnit=GraphicsUnit.Point;
*
* Font fnt = new Font("arial", 12, FontStyle.Underline);
* e.Graphics.DrawString("hello", fnt, Brushes.Tomato, 100, 100);
*
* will not print the underline, even if printing to a virtual printer.
* (preview will work fine). If instead of GraphicsUnit.Inch we use GraphicsUnit.Display,
* Underline gets drawn in the wrong place!
*
* Using GraphicsUnit.Point in both places seems to fix it.
*/
RectangleF VisibleClipInches100;
GraphicsUnit SaveUnits = e.Graphics.PageUnit;
try
{
e.Graphics.PageUnit = GraphicsUnit.Point; //NEEDS TO BE Point, since this is what we will use later. Other unit will confuse GDI+.
VisibleClipInches100 = e.Graphics.VisibleClipBounds;
VisibleClipInches100 = new RectangleF(VisibleClipInches100.X / 72F * 100, VisibleClipInches100.Y / 72F * 100,
VisibleClipInches100.Width / 72F * 100, VisibleClipInches100.Height / 72F * 100);
}
finally
{
e.Graphics.PageUnit = SaveUnits;
}
if (FRenderer == null || FRenderer.Workbook == null)
{
return;
}
System.Drawing.Drawing2D.GraphicsState InitialState = e.Graphics.Save();
try
{
IFlxGraphics aCanvas = new GdiPlusGraphics(e.Graphics);
//We could change the interpolation mode for images here.
//e.Graphics.InterpolationMode = InterpolationMode.HighQualityBilinear;
//e.Graphics.SmoothingMode = SmoothingMode.HighQuality;
//e.Graphics.PageUnit=GraphicsUnit.Display; //Display is not reliable as unit as it might change depending on the device. We will be using Point.
e.Graphics.PageUnit = GraphicsUnit.Point;
if (AntiAliasedText)
{
e.Graphics.TextRenderingHint = TextRenderingHint.AntiAliasGridFit;
}
if (CurrentSheetPage == 1)
{
FRenderer.SetCanvas(aCanvas);
MyPrintRange = FRenderer.InternalCalcPrintArea(FPrintRange);
if (CurrentWorkbookPage == 1 && AllVisibleSheets)
{
TotalWorkbookPages = GetPagesToPrint(e, aCanvas, VisibleClipInches100);
}
FRenderer.InitializePrint(aCanvas, ConvertToUnits(e.PageBounds, false),
ConvertToMargins(e.Graphics, e.PageBounds, VisibleClipInches100, false), MyPrintRange, out PaintClipRect, out TotalSheetPages, out PagePrintRange);
if (!AllVisibleSheets)
{
TotalWorkbookPages = TotalSheetPages;
}
PagesToPrint = TotalWorkbookPages;
if (CurrentWorkbookPage == 1) //skip the first non printing pages.
{
if (PrinterSettings.FromPage > 0 && PrinterSettings.ToPage >= PrinterSettings.FromPage)
{
PagesToPrint = Math.Min(PrinterSettings.ToPage, TotalWorkbookPages);
for (int i = 1; i < PrinterSettings.FromPage; i++)
{
if (CurrentWorkbookPage > TotalWorkbookPages)
{
return;
}
OnBeforePrintPage(e);
FRenderer.GenericPrint(aCanvas, ConvertToUnits(e.PageBounds, false), MyPrintRange, 0, PaintClipRect, 0, false, PagePrintRange, ref CurrentPrintArea);
IncCurrentPage();
}
}
}
}
if (CurrentWorkbookPage <= PagesToPrint)
{
int CurrentPage = ResetPageNumberOnEachSheet ? CurrentSheetPage : CurrentWorkbookPage;
int TotalPages = ResetPageNumberOnEachSheet ? TotalSheetPages : TotalWorkbookPages;
OnBeforePrintPage(e);
FRenderer.GenericPrint(aCanvas, ConvertToUnits(e.PageBounds, false), MyPrintRange, CurrentPage, PaintClipRect, TotalPages, true, PagePrintRange, ref CurrentPrintArea);
IncCurrentPage();
}
e.HasMorePages = CurrentWorkbookPage <= PagesToPrint;
}
finally
{
e.Graphics.Restore(InitialState);
}
base.OnPrintPage(e);
}