protected override void OnLoad(EventArgs e)
{
if (!DesignMode)
{
// Check if have a previous operation
var findText = _documentViewer.Text.LastFindText;
if (findText == null)
{
findText = new DocumentViewerFindText();
}
_matchCaseCheckBox.Checked = findText.MatchCase;
_wholeWordsOnlyCheckBox.Checked = findText.WholeWordsOnly;
_findTextBox.Text = findText.Text;
}
base.OnLoad(e);
}
private void FindText(bool findNext)
{
var text = _findTextBox.Text;
if (string.IsNullOrEmpty(text))
{
return;
}
var findTextOptions = _documentViewer.Text.LastFindText;
if (findTextOptions == null)
{
findTextOptions = new DocumentViewerFindText();
}
findTextOptions.Text = text;
findTextOptions.SelectFirstResult = true;
// Set both to true to highlight all results
findTextOptions.FindAll = false;
findTextOptions.RenderResults = false;
findTextOptions.MatchCase = _matchCaseCheckBox.Checked;
findTextOptions.WholeWordsOnly = _wholeWordsOnlyCheckBox.Checked;
findTextOptions.Loop = true;
// We search the whole document, or just one page (more combinations are possible)
DocumentViewerTextPosition searchBoundsBegin = null;
DocumentViewerTextPosition searchBoundsEnd = null;
bool currentPageOnly = _currentPageOnlyCheckBox.Checked;
int currentPage = _documentViewer.CurrentPageNumber;
var firstPosition = DocumentViewerTextPosition.CreateBeginOfPage(currentPageOnly ? currentPage : 1);
var lastPosition = DocumentViewerTextPosition.CreateEndOfPage(currentPageOnly ? currentPage : _documentViewer.PageCount);
if (findNext)
{
searchBoundsBegin = firstPosition;
searchBoundsEnd = lastPosition;
}
else
{
searchBoundsBegin = lastPosition;
searchBoundsEnd = firstPosition;
}
findTextOptions.BeginPosition = searchBoundsBegin;
findTextOptions.EndPosition = searchBoundsEnd;
if (_documentViewer.Text.HasAnySelectedText)
{
// If we have a selection, we can start our search with the character after it (in direction of search,
// as specified by beginPosition/endPosition)
// If no selected text actually exists, search will default to beginPosition
findTextOptions.Start = DocumentViewerFindTextStart.AfterSelection;
}
// Find out if this might take some time, if so, run it as a busy operation
// Condition is we have a previous find, and we either have all text cached
// or we have text for current page and the operation is in current page only
var mightTakeTime = !_documentViewer.Text.HasDocumentPageText(0);
if (mightTakeTime)
{
// is it same page and we have text for it?
if (currentPageOnly && _documentViewer.Text.HasDocumentPageText(currentPage))
{
mightTakeTime = false;
}
}
MainForm mainForm = this.Owner as MainForm;
new BusyOperation <bool>("Find Text")
{
Begin = () =>
{
if (mightTakeTime)
{
mainForm.BeginBusyOperation();
this.Enabled = false;
}
},
InThread = () =>
{
_documentViewer.Text.ClearRenderedFoundText();
var found = _documentViewer.Text.Find(findTextOptions) != null;
return(found);
},
End = () =>
{
if (mightTakeTime)
{
mainForm.EndBusyOperation();
if (this.InvokeRequired)
{
BeginInvoke((MethodInvoker) delegate
{
this.Enabled = true;
});
}
else
{
this.Enabled = true;
}
}
},
ThenInvoke = (bool textFound) =>
{
if (!textFound)
{
// Check if we have all the text, if not, let the user know
var message = "Finished searching. No more results found";
if (!_documentViewer.Text.AutoGetText && !_documentViewer.Text.HasDocumentPageText(0))
{
message = Helper.AddTextNote(message, false);
}
Helper.ShowInformation(this, message);
}
},
Error = (Exception ex) =>
{
Helper.ShowError(this, ex);
}
}
.Run(this);
}
