HitTest(ImGearPoint,IImGearScrollableView,ImGearPageDisplay,Graphics,Int32,Int32) Method

In This Topic

Returns the index of topmost annotation mark of a hit test.

Syntax

Visual Basic
C#
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Function HitTest( _
   ByVal devicePoint As ImGearPoint, _
   ByVal pageView As IImGearScrollableView, _
   ByVal pageDisplay As ImGearPageDisplay, _
   ByVal graphics As Graphics, _
   ByVal offsetLeft As Integer, _
   ByVal offsetTop As Integer _
) As Integer

'Usage
 
Dim instance As ImGearARTPage
Dim devicePoint As ImGearPoint
Dim pageView As IImGearScrollableView
Dim pageDisplay As ImGearPageDisplay
Dim graphics As Graphics
Dim offsetLeft As Integer
Dim offsetTop As Integer
Dim value As Integer
 
value = instance.HitTest(devicePoint, pageView, pageDisplay, graphics, offsetLeft, offsetTop)

public int HitTest( 
   ImGearPoint devicePoint,
   IImGearScrollableView pageView,
   ImGearPageDisplay pageDisplay,
   Graphics graphics,
   int offsetLeft,
   int offsetTop
)

public: int HitTest( 
   ImGearPoint devicePoint,
   IImGearScrollableView* pageView,
   ImGearPageDisplay* pageDisplay,
   Graphics* graphics,
   int offsetLeft,
   int offsetTop
)

public:
int HitTest( 
   ImGearPoint devicePoint,
   IImGearScrollableView^ pageView,
   ImGearPageDisplay^ pageDisplay,
   Graphics^ graphics,
   int offsetLeft,
   int offsetTop
)

Parameters

devicePoint: Screen point to test.
pageView: PageView control that contains the marks.
pageDisplay: PageDisplay associated with PageView control.
graphics: System graphics.
offsetLeft: Offset from left.
offsetTop: Offset from top.

Return Value

Integer value.

Remarks

Returns the index of the mark located at the screen position [x, y]. If there are no marks at [x,y], the return value from this method is -1.

Example

C#
Visual Basic

// Within a MouseDown event where e.X and e.Y are coordinates
// relative to the page view control:

// Create point parameter for current mouse position.
ImGearPoint igPoint = new ImGearPoint(e.X, e.Y);
// Get the Graphics object for the current PageView.
Graphics igGraphics = imGearPageView1.CreateGraphics();
// Run HitTest on current position getting the top most mark.
int markID = igARTPage.HitTest(igPoint, imGearPageView1,
    imGearPageView1.Display, igGraphics, 0, 0);
// Check if any mark was found.
if (markID >= 0)
{
    // Select the mark found at the hit test.
    igARTPage.MarkSelect(markID, true);
    // Update the page view.
    imGearPageView1.Invalidate();
}

' Within a MouseDown event where e.X and e.Y are coordinates
' relative to the page view control:

' Create point parameter for current mouse position.
Dim igPoint As ImGearPoint = New ImGearPoint(e.X, e.Y)
' Get the Graphics object for the current PageView.
Dim igGraphics As Graphics = ImGearPageView1.CreateGraphics()
' Run HitTest on current position getting the top most mark.
Dim markID As Integer = igARTPage.HitTest(igPoint, ImGearPageView1, _
 ImGearPageView1.Display, igGraphics, 0, 0)
' Check if any mark was found.
If (markID >= 0) Then
    ' Select the mark found at the hit test.
    igARTPage.MarkSelect(markID, True)
    ' Update the page view.
    ImGearPageView1.Invalidate()
End If

Reference

ImGearARTPage Class
ImGearARTPage Members
ImGearPoint Structure
IImGearScrollableView Interface
ImGearPageDisplay Class

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