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LEADTOOLS WPF and Silverlight (Leadtools.Windows.Controls assembly)

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HitTest(Point) Method






The horizontal and vertical position of the coordinate in client coordinates.
Queries the specified location to determine if the point is over an IImageListItem.
Syntax
public int HitTest( 
   Point point
)
'Declaration
 
Public Function HitTest( _
   ByVal point As Point _
) As Integer
'Usage
 
Dim instance As ImageList
Dim point As Point
Dim value As Integer
 
value = instance.HitTest(point)

            

            
public:
int HitTest( 
   Point point
) 

Parameters

point
The horizontal and vertical position of the coordinate in client coordinates.

Return Value

The index of the item in ItemsSource under the given location, or -1 if no IImageListItem is under the location.
Example
Copy Code  
Imports Leadtools.Windows.Controls
Imports Leadtools.Codecs
Imports Leadtools

Private Class MyWindow3 : Inherits Window
   Private imageList As ImageList
   Public Sub New(ByVal title As String)
      title = title

      ' Set the size of the form
      Width = 400
      Height = 200

      ' Create a new ImageList control
      imageList = New ImageList()
      imageList.Background = Brushes.Red
      imageList.SelectionMode = SelectionMode.Single
      imageList.Width = Width
      imageList.Height = Height

      Content = imageList

      ' Create three items
      Dim imagesPath As String = LEAD_VARS.ImagesDir

      For i As Integer = 0 To 2
         ' Load the image
         Dim index As Integer = i + 1
         Dim imageFileName As String = Path.Combine(imagesPath, "ImageProcessingDemo\Image" & index.ToString() & ".jpg")

         Dim item As ImageListItem = New ImageListItem()
         item.Source = New BitmapImage(New Uri(imageFileName))
         item.Text = "item" & index.ToString()

         ' Select the first item
         If i = 0 Then
            item.IsSelected = True
         End If

         ' Add the item to the image list
         imageList.Items.Add(item)
      Next i

      ' Add a handler to the MouseDown event
      AddHandler imageList.PreviewMouseDown, AddressOf ImageList_MouseDown
   End Sub

   Private Sub ImageList_MouseDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
      ' Check for right button clicks
      If e.RightButton = MouseButtonState.Pressed Then
         ' Check if any item is under the cursor poisition
         Dim imageList As ImageList = TryCast(sender, ImageList)
         Dim item As ImageListItem = TryCast(imageList.Items(imageList.HitTest(e.GetPosition(imageList))), ImageListItem)
         If Not item Is Nothing Then
            ' Yes, show the item text in a message box
            MessageBox.Show(Me, item.Text)
         End If
      End If
   End Sub
End Class

Public Sub ImageList_HitTest(ByVal title As String)
   Dim window As MyWindow3 = New MyWindow3(title)
   window.ShowDialog()
End Sub

Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
using Leadtools.Help;
using Leadtools.Windows.Controls;
using Leadtools;
using Leadtools.Codecs;

class MyWindow3 : Window
{
   ImageList imageList;
   public MyWindow3(string title)
   {
      Title = title;

      // Set the size of the form
      Width = 400;
      Height = 200;

      // Create a new ImageList control
      imageList = new ImageList();
      imageList.Background = Brushes.Red;
      imageList.SelectionMode = SelectionMode.Single;
      imageList.Width = Width;
      imageList.Height = Height;

      Content = imageList;

      // Create three items
      string imagesPath = LEAD_VARS.ImagesDir;

      for (int i = 0; i < 3; i++)
      {
         // Load the image
         int index = i + 1;
         string imageFileName = Path.Combine(imagesPath, @"ImageProcessingDemo\Image" + index.ToString() + ".jpg");

         ImageListItem item = new ImageListItem();
         item.Source = new BitmapImage(new Uri(imageFileName));
         item.Text = "item" + index.ToString();

         // Select the first item
         if (i == 0)
            item.IsSelected = true;

         // Add the item to the image list
         imageList.Items.Add(item);
      }

      // Add a handler to the MouseDown event
      AddHandler(ImageListItem.MouseDownEvent, new MouseButtonEventHandler(ImageList_MouseDown));
      imageList.PreviewMouseDown += new MouseButtonEventHandler(ImageList_MouseDown);
   }

   private void ImageList_MouseDown(object sender, MouseButtonEventArgs e)
   {
      // Check for right button clicks
      if (e.RightButton == MouseButtonState.Pressed)
      {
         // Check if any item is under the cursor poisition
         ImageList imageList = sender as ImageList;
         ImageListItem item = imageList.Items[imageList.HitTest(e.GetPosition(imageList))] as ImageListItem;
         if (item != null)
         {
            // Yes, show the item text in a message box
            MessageBox.Show(this, item.Text);
         }
      }
   }
}

public void ImageList_HitTest(string title)
{
   MyWindow3 window = new MyWindow3(title);
   window.ShowDialog();
}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
using Leadtools.Help;
using Leadtools.Windows.Controls;

class MyWindow3 : ChildWindow
{
   ImageList imageList;
   public MyWindow3(string title)
   {
      Title = title;

      // Set the size of the form
      Width = 400;
      Height = 200;

      // Create a new ImageList control
      imageList = new ImageList();
      imageList.Background = new SolidColorBrush(Colors.Red);
      imageList.SelectionMode = SelectionMode.Single;
      imageList.Width = Width;
      imageList.Height = Height;

      Content = imageList;

      // Create three items
      string imagesPath = LeadtoolsExamples.Common.ImagesPath.Path;

      for (int i = 0; i < 3; i++)
      {
         // Load the image
         int index = i + 1;
         string imageFileName = imagesPath + "Image" + index.ToString() + ".jpg";

         ImageListItem item = new ImageListItem();
         item.Source = new BitmapImage(new Uri(imageFileName));
         item.Text = "item" + index.ToString();

         // Select the first item
         if (i == 0)
            item.IsSelected = true;

         // Add the item to the image list
         imageList.Items.Add(item);
      }

      // Add a handler to the MouseDown event
      AddHandler(ImageListItem.MouseLeftButtonDownEvent, new MouseButtonEventHandler(imageList_MouseLeftButtonDown), false);
      imageList.MouseLeftButtonDown +=new MouseButtonEventHandler(imageList_MouseLeftButtonDown);
   }

   void imageList_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
   {
      // Check if any item is under the cursor position
      ImageList imageList = sender as ImageList;
      ImageListItem item = imageList.Items[imageList.HitTest(e.GetPosition(imageList))] as ImageListItem;
      if (item != null)
      {
         // Yes, show the item text in a message box
         MessageBox.Show(item.Text);
      }
   }
}

public void ImageList_HitTest(string title)
{
   MyWindow3 window = new MyWindow3(title);
   window.Show();
}
Imports Leadtools.Windows.Controls

Private Class MyWindow3 : Inherits ChildWindow
   Private imageList As ImageList
   Public Sub New(ByVal title As String)
      title = title

      ' Set the size of the form
      Width = 400
      Height = 200

      ' Create a new ImageList control
      imageList = New ImageList()
      imageList.Background = New SolidColorBrush(Colors.Red)
      imageList.SelectionMode = SelectionMode.Single
      imageList.Width = Width
      imageList.Height = Height

      Content = imageList

      ' Create three items
      Dim imagesPath As String = LeadtoolsExamples.Common.ImagesPath.Path

      For i As Integer = 0 To 2
         ' Load the image
         Dim index As Integer = i + 1
         Dim imageFileName As String = imagesPath & "Image" & index.ToString() & ".jpg"

         Dim item As ImageListItem = New ImageListItem()
         item.Source = New BitmapImage(New Uri(imageFileName))
         item.Text = "item" & index.ToString()

         ' Select the first item
         If i = 0 Then
            item.IsSelected = True
         End If

         ' Add the item to the image list
         imageList.Items.Add(item)
      Next i

      ' Add a handler to the MouseDown event
      AddHandler imageList.MouseLeftButtonDown, AddressOf imageList_MouseLeftButtonDown
   End Sub

   Private Sub imageList_MouseLeftButtonDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
      ' Check if any item is under the cursor position
      Dim imageList As ImageList = TryCast(sender, ImageList)
      Dim item As ImageListItem = TryCast(imageList.Items(imageList.HitTest(e.GetPosition(imageList))), ImageListItem)
      If Not item Is Nothing Then
         ' Yes, show the item text in a message box
         MessageBox.Show(item.Text)
      End If
   End Sub
End Class

Public Sub ImageList_HitTest(ByVal title As String)
   Dim window As MyWindow3 = New MyWindow3(title)
   window.Show()
End Sub
Requirements

Target Platforms

See Also

Reference

ImageList Class
ImageList Members

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