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Knowledge Base - Get selected text's rectangle (before adding annotation) Android

In some cases, you may need to get the rectangle of the selected text, without adding an annotation (export motives for example).

To do so, you can use the below method, which will return the rectangle of the selected text in PDF coordinates.

You can call the below method in PDFLayoutView.onTouchSelect as follows:

case MotionEvent.ACTION_CANCEL:
if(m_sel != null)
{
m_sel.SetSel( m_annot_pos.x, m_annot_pos.y,
m_annot_page.ToPDFX(event.getX(), m_layout.vGetX()),
m_annot_page.ToPDFY(event.getY(), m_layout.vGetY()) );
invalidate();
float[] rect = getSelectionRect(event.getX(), event.getY());
if(m_listener != null) m_listener.OnPDFSelectEnd(m_sel.GetSelString());
}
break;

getSelectionRect:

private float[] getSelectionRect(float lastX, float lastY) {
float pt[] = new float[2];
pt[0] = m_annot_pos.x;
pt[1] = m_annot_pos.y;
Page page = m_doc.GetPage(m_annot_pos.pageno);
page.ObjsStart();
int index1 = page.ObjsGetCharIndex(pt);
pt[0] = m_annot_page.ToPDFX(lastX, m_layout.vGetX());
pt[1] = m_annot_page.ToPDFY(lastY, m_layout.vGetY());
int index2 = page.ObjsGetCharIndex(pt);
if( index1 > index2 ) {
int tmp = index1;
index1 = index2;
index2 = tmp;
}

index1 = page.ObjsAlignWord(index1, -1);
index2 = page.ObjsAlignWord(index2, 1);
float[] rect = new float[4];
float[] selectRect = new float[4];
page.ObjsGetCharRect(index1, rect);
selectRect[0] = rect[0];
selectRect[1] = rect[1];
selectRect[2] = rect[2];
selectRect[3] = rect[3];
int tmp = index1 + 1;
while( tmp <= index2 ) {
page.ObjsGetCharRect(tmp, rect);
float gap = (rect[3] - rect[1])/2;
if( selectRect[1] == rect[1] && selectRect[3] == rect[3] &&
selectRect[2] + gap > rect[0] && selectRect[0] - gap < rect[2] ) {
if( selectRect[0] > rect[0] ) selectRect[0] = rect[0];
if( selectRect[2] < rect[2] ) selectRect[2] = rect[2];
}
else {
if( selectRect[0] > rect[0] ) selectRect[0] = rect[0];
selectRect[1] = rect[1];
if( selectRect[2] < rect[2] ) selectRect[2] = rect[2];
if( selectRect[3] < rect[3] ) selectRect[3] = rect[3];
}
tmp++;
}
return selectRect;
}

 

Applies To

RadaeePDF SDK for Android

Details

Created : 2017-07-11 12:40:32, Last Modified : 2017-07-11 12:48:54

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