Re: Problem with Search Results of PDFDocument-Class

[Claus Dietrich <claus.dietrich@xxxxxxxxxx>]

Am 01.09.24 um 06:35 schrieb BB:
> guess we need to determine a range based on the topmost-leftmost 
> character and the bottommost-rightmost character position (as the last 
> line may not be as wide) for both realms and work out a conversion 
> from there. 

The following solution seems to do what we need and also worked 
perfectly with a complex PDF document. It even marked words correctly 
which were part of the footer and turned by 90 degrees:

Public Sub DocumentView1_Draw(Page As Integer, Width As Integer, Height 
As Integer)
    Dim hOverlayImage As Image
    Dim aRectF As RectF[]
    Dim i As Integer
    Dim xFactor As Float  <----- new
    Dim yFactor As Float  <----- new

    'Draw the overlay of search results if any
    If cSearchResult.Exist(Page) Then
       xFactor = Width / hDoc[Page].W     <------ new
       yFactor = Height / hDoc[Page].H    <------ new
       aRectF = cSearchResult[Page]
       hOverlayImage = New Image(width, Height)
       Paint.Begin(hOverlayImage)
         Paint.Brush = Paint.Color(Color.SetAlpha(Color.red, 180))
         For i = 0 To aRectF.Max
           'Paint.Rectangle(aRectF[i].x, aRectF[i].y, aRectF[i].w, 
aRectF[i].h) 'old
           Paint.Rectangle(aRectF[i].x * xFactor, Height - aRectF[i].h 
* yFactor - aRectF[i].y * yFactor, aRectF[i].w * xFactor, aRectF[i].h * 
yfactor) '<---- new
           Paint.Fill
         Next
       Paint.End
    End If

    .....

This is what it does (point 4. was guess work):

1. The different co-ordinate realms of the DocumentViewer and the 
PDFDocument are used to calculate translation factors,

2. the coordinates and dimensions of the hit rectangles are corrected by 
the factors,

3. the target coordinates are used upside down,

4. and the target coordinates are shifted by the height of the corrected 
hit rectangle.

I regard the subject as solved.

Regards

Claus