Queries the specified location to determine whether the point is over an
ImageListItem.
Syntax
Visual Basic (Declaration) | |
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Public Function HitTest( _
ByVal point As Point _
) As Integer |
Visual Basic (Usage) | Copy Code |
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Dim instance As ImageList
Dim point As Point
Dim value As Integer
value = instance.HitTest(point)
|
Parameters
- point
- Represents the horizontal and vertical position of the coordinate in client coordinates.
Return Value
An
ImageListItem object under the given location, or null
(Nothing in Visual Basic) if no
ImageListItem is under the location.
Example
This example will create and populate a ImageList control, and then perform hittesting
when the user right-clicks on the control and views the item information.
Visual Basic | Copy Code |
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Private Class MyWindow3 : Inherits Window
Private imageList As ImageList
Public Sub New(ByVal title As String)
title = title
Width = 400
Height = 200
imageList = New ImageList()
imageList.Background = Brushes.Red
imageList.SelectionMode = SelectionMode.Single
imageList.Width = Width
imageList.Height = Height
Content = imageList
Dim imagesPath As String = "C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\"
For i As Integer = 0 To 2
Dim index As Integer = i + 1
Dim imageFileName As String = imagesPath & "Image" & index.ToString() & ".jpg"
Dim item As ImageListItem = New ImageListItem(New BitmapImage(New Uri(imageFileName)), "item" & index.ToString())
If i = 0 Then
item.IsSelected = True
End If
imageList.Items.Add(item)
Next i
AddHandler imageList.PreviewMouseDown, AddressOf ImageList_MouseDown
End Sub
Private Sub ImageList_MouseDown(ByVal sender As Object, ByVal e As MouseButtonEventArgs)
If e.RightButton = MouseButtonState.Pressed Then
Dim imageList As ImageList = CType(IIf(TypeOf sender Is ImageList, sender, Nothing), ImageList)
Dim item As ImageListItem = CType(IIf(TypeOf imageList.Items(imageList.HitTest(e.GetPosition(imageList))) Is ImageListItem, imageList.Items(imageList.HitTest(e.GetPosition(imageList))), Nothing), ImageListItem)
If Not item Is Nothing Then
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 |
C# | Copy Code |
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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 = @"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\"; 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(new BitmapImage(new Uri(imageFileName)), "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(); } |
Requirements
Target Platforms: Microsoft .NET Framework 3.0, Windows XP, Windows Vista, and Windows Server 2003 family
See Also