PreviewPages Sample (C#)
This sample illustrates application-generated output.
The source code is located at C:\Program Files (x86)\Softelvdm\SftPrintPreview OCX 1.0\Samples\Visual Studio - CSharp\PreviewPages\Form1.cs or C:\Program Files\Softelvdm\SftPrintPreview OCX 1.0\Samples\Visual Studio - CSharp\PreviewPages\Form1.cs (on 32-bit Windows versions).
private void menuExit_Click(object sender, System.EventArgs e) {
Application.Exit();
}
private void Form1_Load(object sender, System.EventArgs e)
{
axSftPrintPreview1.Dock = DockStyle.Fill;
// Use the RenderContent event to render pages
axSftPrintPreview1.ContentProviderCallback(0, IntPtr.Zero, IntPtr.Zero);
Show(); // Show this form so we get the form and the messagebox at the same time
MessageBox.Show("This example demonstrates application-generated output.\r\n\r\nIt prints one bitmap and 50 lines of text a total of 20 times. " +
"The included source code illustrates how an application can print one page at a time, with an easy " +
"mechanism to keep track of restart positions.");
}
private void axSftPrintPreview1_CloseWanted(object sender, System.EventArgs e)
{
Application.Exit();
}
private void axSftPrintPreview1_HelpWanted(object sender, AxSftPrintPreviewLib10._ISftPrintPreviewEvents_HelpWantedEvent e)
{
MessageBox.Show("Sorry, this sample doesn't offer a help file");
}
private void axSftPrintPreview1_PageSetupWanted(object sender, System.EventArgs e)
{
axSftPrintPreview1.PageSetup(0);
}
private void axSftPrintPreview1_RenderContent(object sender, AxSftPrintPreviewLib10._ISftPrintPreviewEvents_RenderContentEvent e)
{
// This function is called by SftPrintPreview to print pages, to initialize and
// terminate printing (to prepare and free resources) and for page positioning
if (e.function == SftPrintPreviewRenderContentConstants.renderSftPrintPreview_Init)
m_PrintFont = new Font("Arial", 10);
else if (e.function == SftPrintPreviewRenderContentConstants.renderSftPrintPreview_Term)
m_PrintFont = null;
else if (e.function == SftPrintPreviewRenderContentConstants.renderSftPrintPreview_1Page)
PrintOnePage(ref e.visitedPageInfo, ref e.lastPage);
}
private void PrintOnePage(ref object visitedPageInfo, ref int lastPage)
{
// Print one page (can occur multiple times)
// RenderingInfo.CurrentPage has the absolute page # to print (0..n)
// RenderingInfo.PreviousVisitedPageInfo contains the value you returned in
// RenderingInfo.VisitedPageInfo when you finished printing the previous page
// This allows you to simply restart where you left off.
// The information you return in RenderingInfo.VisitedPageInfo is of type
// object, so it can be a simple counter or even a complex object, with cached
// information.
// In this example we print 1 bitmap, then 50 lines of text,
// 20 times
// We use RenderingInfo.PreviousVisitedPageInfo to resume printing.
// We simply start at 0 and add 1 for each bitmap or line we
// printed. Using a simple formula, we can determine where we
// left off. In an application, the concept remains the same, but
// instead of a simple counter, you could use RenderingInfo.VisitedPageInfo
// to store more complex information.
// Set up a Graphics object where we render the page
Graphics g = Graphics.FromHdc((IntPtr)axSftPrintPreview1.RenderingInfo.hDC);
g.PageUnit = GraphicsUnit.Pixel; // set it to pixel mode
// It is also possible to set it to GraphicsUnit.Inch or GraphicsUnit.Millimeter or the other
// unit modes. Information in RenderingInfo is available in pixels and .
long counter = 0;
SolidBrush brush = new SolidBrush(Color.Black);// Color printers support other colors too
Rectangle outRect = new Rectangle(axSftPrintPreview1.RenderingInfo.OutputRectDisplayPix.left, axSftPrintPreview1.RenderingInfo.OutputRectDisplayPix.top,
axSftPrintPreview1.RenderingInfo.OutputRectDisplayPix.right-axSftPrintPreview1.RenderingInfo.OutputRectDisplayPix.left, axSftPrintPreview1.RenderingInfo.OutputRectDisplayPix.bottom-axSftPrintPreview1.RenderingInfo.OutputRectDisplayPix.top);
if (axSftPrintPreview1.RenderingInfo.PreviousVisitedPageInfo != null)
counter = (long) axSftPrintPreview1.RenderingInfo.PreviousVisitedPageInfo;// we left off here on the previous page
// starting output position on this page
int xPrinter, yPrinter;
xPrinter = outRect.Left;
yPrinter = outRect.Top;
for ( ; ; )
{
if (counter >= (1+50)*20) // 1 bitmap, 50 lines of text, 20 times
{
// we have printed 1 bitmap and 50 lines 20 times, we're done
lastPage = axSftPrintPreview1.RenderingInfo.CurrentPage; // return that this is the last page
break;
}
if ((counter % (50+1)) == 0)
{
// Print a bitmap
// get bitmap size
Bitmap bmp = new Bitmap(pictureBox1.Image);
int wPrinterPix, hPrinterPix, wDispPix, hDispPix;
IntPtr hBmp = bmp.GetHbitmap();
axSftPrintPreview1.GetDDBSize((int) hBmp, (int) axSftPrintPreview1.RenderingInfo.hDC, out wPrinterPix, out hPrinterPix, out wDispPix, out hDispPix);
// make sure entire image fits on remaining page
if (yPrinter + hPrinterPix > outRect.Bottom) {
DeleteObject(hBmp);
break;
}
// print bitmap, horizontally centered
axSftPrintPreview1.PrintDDB((int) hBmp, axSftPrintPreview1.RenderingInfo.hDC, xPrinter +(outRect.Width-wPrinterPix)/2,
yPrinter, wPrinterPix, hPrinterPix, wDispPix, hDispPix);
DeleteObject(hBmp);
yPrinter += hPrinterPix; // next available space
}
else
{
// Print line
// get text size
SizeF s = g.MeasureString(m_drawText, m_PrintFont);
// make sure text fits on remaining page
if (yPrinter + s.Height > outRect.Bottom)
break;
Point pt = new Point(outRect.Left + (outRect.Width - (int) s.Width)/2, yPrinter);
g.DrawString(m_drawText, m_PrintFont, brush, pt);
yPrinter += (int) s.Height;
}
++counter; // one more item done
}
visitedPageInfo = counter; // we left off here
}
On
Off