RasterImagePainter Class (original) (raw)
Syntax
public static class RasterImagePainter public ref class RasterImagePainter abstract sealed class RasterImagePainter: Example
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Drawing;
using Leadtools.ImageProcessing;
public void PaintExample()
{
PaintForm f = new PaintForm();
f.ShowDialog();
}
class PaintForm : Form
{
private RasterImage image;
private RasterPaintProperties props;
public PaintForm()
{
// Load the image
RasterCodecs codecs = new RasterCodecs();
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Ocr1.tif");
image = codecs.Load(srcFileName);
Text = "Normal - doubleclick to change.";
props = RasterPaintProperties.Default;
props.PaintDisplayMode = RasterPaintDisplayModeFlags.None;
}
protected override void Dispose(bool disposing)
{
// Clean up
if (disposing)
{
image.Dispose();
}
base.Dispose(disposing);
}
protected override void OnDoubleClick(EventArgs e)
{
if ((props.PaintDisplayMode & RasterPaintDisplayModeFlags.ScaleToGray) == RasterPaintDisplayModeFlags.ScaleToGray)
{
Text = "Normal - doubleclick to change.";
props.PaintDisplayMode &= ~RasterPaintDisplayModeFlags.ScaleToGray;
}
else
{
Text = "ScaleToGray - doubleclick to change.";
props.PaintDisplayMode |= RasterPaintDisplayModeFlags.ScaleToGray;
}
Invalidate();
base.OnDoubleClick(e);
}
protected override void OnPaint(PaintEventArgs e)
{
// Draw the image fit and center on this form
LeadRect destRect = LeadRect.FromLTRB(ClientRectangle.Left, ClientRectangle.Top, ClientRectangle.Right, ClientRectangle.Bottom);
destRect = RasterImage.CalculatePaintModeRectangle(
image.ImageWidth,
image.ImageHeight,
destRect,
RasterPaintSizeMode.Fit,
RasterPaintAlignMode.Center,
RasterPaintAlignMode.Center);
RasterImagePainter.Paint(image, e.Graphics, LeadRect.Empty, destRect, props);
base.OnPaint(e);
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}