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#1 2016-12-26 05:52:09
- sirmfletcher
- Member
- Registered: 2016-12-10
- Posts: 8
How to Center Printouts Horizontally, Vertically or Both
I've added some code to enable the ability to print out content centered on a sheet
horizontally (i need this) and/or vertically (i don't need this).
in the file print.cs around line 625-626
RGFloat scaling = this.printSettings == null ? 1f : (this.printSettings.PageScaling);
Rectangle paperBounds = this.GetPaperPrintBounds();
// added by M. Fletcher 12/25/16
if (PrintSettings.CenterHorizontally || PrintSettings.CenterVertically)
paperBounds = PrintContentCentered(printContentBounds); // new function to calculate margins for centering
RGFloat paperWidth = paperBounds.Width / scaling;
RGFloat paperHeight = paperBounds.Height / scaling;
// added by M. Fletcher 12/25/16
if (PrintSettings.CenterHorizontally || PrintSettings.CenterVertically)
paperBounds = PrintContentCentered(printContentBounds);new function added in print.cs
/// <summary>
/// Center the printout horizontally and/or vertically if user set CenterHorizontally or CenterVertically in printsettings
/// This will readjust the margins so that printout if its less than the dimension of the page will look centered in the axis specified.
/// </summary>
/// <param name="printContentBounds"></param>
/// <returns></returns>
internal Rectangle PrintContentCentered(Rectangle printContentBounds)
{
RGFloat pWidth;
RGFloat pHeight;
// get true page dimensions to work with in our calculations
if (this.PrintSettings.Landscape)
{
pWidth = this.PrintSettings.PaperHeight * 100;
pHeight = this.PrintSettings.PaperWidth * 100;
}
else // portrait orientation
{
pWidth = this.PrintSettings.PaperWidth * 100;
pHeight = this.PrintSettings.PaperHeight * 100;
}
// see if we need to center Horizontally
if (this.PrintSettings.CenterHorizontally)
{
// center our width if possible
if (printContentBounds.Width < pWidth)
{
float leftmargin = (float)Math.Round(((pWidth - printContentBounds.Width) / 200), 2);
// since we can't always get exact same, let right be more or less than left
float rightmargin = ((pWidth - printContentBounds.Width) / 100 - leftmargin);
PageMargins pm = this.PrintSettings.Margins;
if (leftmargin != pm.Left || rightmargin != pm.Right)
{
pm.Left = leftmargin;
pm.Right = rightmargin;
// update our printsettings
this.PrintSettings.Margins = pm;
}
}
} // end of if CenterHorizontally
if (this.PrintSettings.CenterVertically)
{
// center our height if possible
if (printContentBounds.Height < pHeight)
{
float topmargin = (float)Math.Round(((pHeight - printContentBounds.Height) / 200), 2);
float bottommargin = ((pHeight - printContentBounds.Height) / 100 - topmargin);
PageMargins pm = this.PrintSettings.Margins;
if (topmargin != pm.Top || bottommargin != pm.Bottom)
{
pm.Top = topmargin;
pm.Bottom = bottommargin;
// update our print settings
this.PrintSettings.Margins = pm;
}
}
} // end of if CenterVertically
return this.GetPaperPrintBounds();
} // end of PrintContentCentered()in the PrintSettings.cs file 2 properties added
/// <summary>
/// Get or set the paper margins.
/// </summary>
public PageMargins Margins { get; set; }
// around line 93 added
//--- Added by M.Fletcher 12/25/16 CenterHorizontally and CenterVertically
/// <summary>
/// Get or set whether printout should be centered accross the page horizontally (ignores margin left/right settings)
/// </summary>
public bool CenterHorizontally { get; set; }
/// <summary>
/// Get or set whether printout should be centered down the page vertically (ignores margin top/bottom settings)
/// </summary>
public bool CenterVertically { get; set; }
//--- end Added by M.Fletcher 12/25/16 CenterHorizontally and CenterVertically
/// <summary>
/// Construct print settings instance.
/// </summary>
public PrintSettings()
this.PageScaling = 1f;
this.PageOrder = PrintPageOrder.DownThenOver;
//this.PaperSize = PaperSize.Letter;
this.PaperName = Print.PaperSize.Letter.ToString();
this.PaperWidth = 8.5f;
this.PaperHeight = 11f;
this.Landscape = false;
this.CenterHorizontally = false; // added by M. Fletcher default to false
this.CenterVertically = false; // added by M. Fletcher default to false
this.Margins = new PageMargins(1f);
}
// and added to Clone function/method
public object Clone()
{
return new PrintSettings()
{
PrinterName = this.PrinterName,
PageOrder = this.PageOrder,
PageScaling = this.PageScaling,
ShowMargins = this.ShowMargins,
ShowGridLines = this.ShowGridLines,
//PaperSize = this.PaperSize,
PaperName = PaperName,
PaperWidth = this.PaperWidth,
PaperHeight = this.PaperHeight,
Landscape = this.Landscape,
CenterHorizontally = this.CenterHorizontally, // added by M. Fletcher 12/25/16
CenterVertically = this.CenterVertically, //added by M. Fletcher 12/25/16
Margins = this.Margins,
};
}updated printsettingsdialog.cs in reogrid Editor Demo
4 new lines of code (3 new controls as pictured above, a groupbox, and 2 checkboxes)
in protected overrid void OnLoad(EventArgs e)
...
// around line #75 after chckPrintGridLines.Checked = ps.ShowGridLines
chkCenterHorizontally.Checked = ps.CenterHorizontally; // added by M.Fletcher 12/25/16
chkCenterVertically.Checked = ps.CenterVertically; // added by M.Fletcher 12/25/16
...
and
private void btnOK_Click(object sender, EventArgs e)
...
// around line 126 after ps.ShowGridLines = chkPrintGridLines.Checked;
ps.CenterHorizontally = chkCenterHorizontally.Checked; //added by M.Fletcher 12/25/16
ps.CenterVertically = chkCenterVertically.Checked; // added by M.Fletcher 12/25/16
....
Results
Horizontally Centered only..
Vertically and Horizontally Centered
I noticed that some of my test sheets had an extra blank column in the print area by default
causing the print preview to be off-center, until i adjusted the print area.
Now if only I could zoom above 100% like in excel... hummm
Fletch
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#2 2016-12-26 07:10:05
- Jingwood
- Moderator
- From: jing at reogrid.net
- Registered: 2014-06-03
- Posts: 615
Re: How to Center Printouts Horizontally, Vertically or Both
Hi Fletch, thank you for sharing the nice improvements like this! Do you use GitHub? if so we can merge your code more directly and quickly.
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#3 2016-12-26 16:52:29
- sirmfletcher
- Member
- Registered: 2016-12-10
- Posts: 8
Re: How to Center Printouts Horizontally, Vertically or Both
Jing,
Yes I do have github installed on my computer.
I've made additional improvements this morning, to take into account scaling both below and above 100%.
now print content can be enlarged or reduced with scaling factor to fit more of the paper
changes to PrintContentCentered, added new parameter from calling function , the scaling factor
internal Rectangle PrintContentCentered(Rectangle printContentBounds, RGFloat scaling)
{
RGFloat pWidth;
RGFloat pHeight;
RGFloat pcWidth;
RGFloat pcHeight;
// get true page dimensions to work with in our calculations
if (this.PrintSettings.Landscape)
{
pWidth = this.PrintSettings.PaperHeight * 100;
pHeight = this.PrintSettings.PaperWidth * 100;
}
else // portrait orientation
{
pWidth = this.PrintSettings.PaperWidth * 100;
pHeight = this.PrintSettings.PaperHeight * 100;
}
// get width of content scaled at whatever factor we chose
pcWidth = (int)Math.Round(printContentBounds.Width * scaling);
// get height of content scaled at whatever factor we chose
pcHeight = (int)Math.Round(printContentBounds.Height * scaling);
// see if we need to center Horizontally
if (this.PrintSettings.CenterHorizontally)
{
// center our width if possible
if (printContentBounds.Width < pWidth)
{
float leftmargin = (float)Math.Round(((pWidth - pcWidth) / 200), 2); //printContentBounds.Width
// since we can't always get exact same, let right be more or less than left
float rightmargin = ((pWidth - pcWidth) / 100 - leftmargin); //printContentBounds.Width
PageMargins pm = this.PrintSettings.Margins;
if (leftmargin != pm.Left || rightmargin != pm.Right)
{
pm.Left = leftmargin;
pm.Right = rightmargin;
// update our printsettings
this.PrintSettings.Margins = pm;
}
}
} // end of if CenterHorizontally
if (this.PrintSettings.CenterVertically)
{
// center our height if possible
if (printContentBounds.Height < pHeight)
{
float topmargin = (float)Math.Round(((pHeight -pcHeight) / 200), 2);
// since we can't always get exact same, let bottom be more or less than top
float bottommargin = ((pHeight - pcHeight) / 100 - topmargin);
PageMargins pm = this.PrintSettings.Margins;
if (topmargin != pm.Top || bottommargin != pm.Bottom)
{
pm.Top = topmargin;
pm.Bottom = bottommargin;
// update our print settings
this.PrintSettings.Margins = pm;
}
}
} // end of if CenterVertically
return this.GetPaperPrintBounds();
} // end of PrintContentCentered()and in the calling function
// added by M. Fletcher 12/25/16
if (PrintSettings.CenterHorizontally || PrintSettings.CenterVertically)
paperBounds = PrintContentCentered(printContentBounds, scaling);
screenshots of the results
Page Centered Horizontally and Vertically at 75% Scale
Page Centered Horizontally with Top Margin 1" at 75% Scale
Page Centered Horizontally and Vertically at 155% Scale
Page Centered Horizontally with 0.5" Top Margin at 155% Scale
I also adjusted the limits on the NumericUpDown control on the printsettingsdialog.cs to allow values upto 500(%) for testing the scaling up and down.
The only other issue i've noticed, is adjusting the print bounding rect causes scaling factor to revert back to 100% instead of staying above 100%
Getting closer to what I need in my application which will print and display reports using your control!
Thanks,
Fletch
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