HitTestItemPart Method (original) (raw)
Summary
Specific part of the item under a physical (in viewer pixel) coordinates.
Syntax
Parameters
item
The reference item. This value cannot be null.
point
The point in physical (in viewer pixel) coordinates.
Return Value
The specific item part under the specified point, or ImageViewerItemPart.View if the point is not over the item.
Example
using Leadtools;
using Leadtools.Controls;
using Leadtools.Codecs;
using Leadtools.Drawing;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Color;
public void ImageViewerHitTestItem_Example()
{
// Clear all the images already the viewer
_imageViewer.Items.Clear();
// Use vertical view layout
_imageViewer.ViewLayout = new ImageViewerVerticalViewLayout();
// Make sure the item size is larger than the image size (thumbnails mode)
_imageViewer.ItemSize = LeadSize.Create(200, 200);
_imageViewer.ItemPadding = new Padding(8, 8, 8, 20);
_imageViewer.ImageBorderThickness = 1;
// Add 4 items to the viewer
using (var codecs = new RasterCodecs())
{
for (var page = 1; page <= 4; page++)
{
var 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);
}
item.Text = string.Format("Item {0}", page - 1);
_imageViewer.Items.Add(item);
}
}
string[] itemPartNames =
{
"View",
"Item",
"Content",
"Image",
"TextArea",
"Text",
"Floater"
};
// Hook to the viewer mouse click event
_imageViewer.MouseClick += (sender, e) =>
{
var point = LeadPoint.Create(e.X, e.Y);
// Hit-test the item
var item = _imageViewer.HitTestItem(point);
// If we have an item, find out the part
if (item != null)
{
var part = _imageViewer.HitTestItemPart(item, point);
_label.Text = string.Format("Clicked the {0} part of item at index {1}",
itemPartNames[(int)part],
_imageViewer.Items.IndexOf(item));
}
else
{
_label.Text = "Click the view";
}
};
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}