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Number of columns to use with this layout.
public int Columns { get; set; }
public:
property int Columns
{
int get()
void set(int value)
}
The number of columns to use with this layout. Default value is 1.
For more information on how this value effect the layout, refer to ImageViewerVerticalViewLayout.
using Leadtools;
using Leadtools.Controls;
using Leadtools.Codecs;
using Leadtools.Drawing;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
public ImageViewerForm _form = new ImageViewerForm();
public ComboBox comboBox = new ComboBox();
public ImageViewer _imageViewer;
public void ImageViewerViewLayoutExample()
{
// Get the ImageViewer control from the form
_imageViewer = _form.ImageViewer;
// Clear all the images already the viewer
_imageViewer.Items.Clear();
// Use vertical view layout
_imageViewer.ViewLayout = new ImageViewerVerticalViewLayout();
// Item Border
_imageViewer.ItemBorderThickness = 1;
// Make sure the item size is larger than the image size (thumbnails mode)
_imageViewer.ItemSize = LeadSize.Create(200, 200);
// Add 4 items to the viewer
using (var codecs = new RasterCodecs())
{
for (var page = 1; page <= 4; page++)
{
ImageViewerItem item = new ImageViewerItem();
var fileName = Path.Combine(LEAD_VARS.ImagesDir, string.Format("ocr{0}.tif", page));
// Create a thumbnail from the image
using (var image = codecs.Load(fileName, page))
{
item.Image = image.CreateThumbnail(180, 180, 24, RasterViewPerspective.TopLeft, RasterSizeFlags.Resample);
}
_imageViewer.Items.Add(item);
}
}
// Add a combo box control to show the view layout modes
comboBox.Top = _form.ClientRectangle.Top;
_form.Controls.Add(comboBox);
// Add an entry for each view mode to the combo box
comboBox.Items.Add("Single view layout");
comboBox.Items.Add("Vertical view layout");
comboBox.Items.Add("Horizontal view layout");
comboBox.Items.Add("Vertical view layout - 2 Columns");
comboBox.Items.Add("Horizontal view layout - 2 Rows");
comboBox.BringToFront();
// When the user selects a view layout mode from the combo box
comboBox.SelectedIndexChanged += ComboBox_SelectedIndexChanged;
}
private void ComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
ComboBox comboBox = sender as ComboBox;
ImageViewerViewLayout layout;
switch (comboBox.SelectedItem.ToString())
{
case "Single view layout":
layout = new ImageViewerSingleViewLayout();
break;
case "Vertical view layout":
default:
layout = new ImageViewerVerticalViewLayout();
break;
case "Horizontal view layout":
layout = new ImageViewerHorizontalViewLayout();
break;
case "Vertical view layout - 2 Columns":
layout = new ImageViewerVerticalViewLayout() { Columns = 2 };
break;
case "Horizontal view layout - 2 Rows":
layout = new ImageViewerHorizontalViewLayout() { Rows = 2 };
break;
}
_imageViewer.ViewLayout = layout;
_imageViewer.UpdateTransform();
// Call Zoom with current values to update ImageViewer.ViewLayout values
_imageViewer.Zoom(_imageViewer.SizeMode, _imageViewer.ScaleFactor, _imageViewer.DefaultZoomOrigin);
string msg = string.Format("Layout.Name = {0}\nLayout.SizeModeHeight = {1}\nLayout.SizeModeHeightItemCount = {2}\nLayout.SizeModeWidth = {3}\nLayout.SizeModeWidthItemCount = {4}\n",
_imageViewer.ViewLayout.Name,
_imageViewer.ViewLayout.SizeModeHeight,
_imageViewer.ViewLayout.SizeModeHeightItemCount,
_imageViewer.ViewLayout.SizeModeWidth,
_imageViewer.ViewLayout.SizeModeWidthItemCount);
Debug.WriteLine(msg, "ImageViewerLayout Information");
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images";
}
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