protected override void OnDoubleClick(EventArgs e)
{
int i = PageCoordinatesToLineIndex(mouseDoubleClickPosition);
if (i >= 0)
{
TextLineInformation lineToBeChanged =
(TextLineInformation)documentLines[i];
lineToBeChanged.Text = lineToBeChanged.Text.ToUpper();
Graphics dc = CreateGraphics();
uint newWidth = (uint)dc.MeasureString(lineToBeChanged.Text,
mainFont).Width;
if (newWidth > lineToBeChanged.Width)
{
lineToBeChanged.Width = newWidth;
}
if (newWidth + 2 * margin > documentSize.Width)
{
documentSize.Width = (int)newWidth;
AutoScrollMinSize = documentSize;
}
Rectangle changedRectangle = new Rectangle(
LineIndexToPageCoordinates(i),
new Size((int)newWidth,
(int)lineHeight));
Invalidate(changedRectangle);
}
base.OnDoubleClick(e);
}
private int WorldCoordinatesToLineIndex(Point position)
{
if (!documentHasData)
{
return(-1);
}
if (position.Y < margin || position.X < margin)
{
return(-1);
}
int index = (int)(position.Y - margin) / (int)lineHeight;
// check position isn't below document
if (index >= documentLines.Count)
{
return(-1);
}
// now check that horizontal position is within this line
TextLineInformation theLine =
(TextLineInformation)documentLines[index];
if (position.X > margin + theLine.Width)
{
return(-1);
}
// all is OK. We can return answer
return(index);
}
private void LoadFile(string FileName)
{
StreamReader sr = new StreamReader(FileName);
string nextLine;
documentLines.Clear();
nLines = 0;
TextLineInformation nextLineInfo;
while ((nextLine = sr.ReadLine()) != null)
{
nextLineInfo = new TextLineInformation();
nextLineInfo.Text = nextLine;
documentLines.Add(nextLineInfo);
++nLines;
}
sr.Close();
if (nLines > 0)
{
documentHasData = true;
menuFilePrint.Enabled = true;
menuFilePrintPreview.Enabled = true;
}
else
{
documentHasData = false;
menuFilePrint.Enabled = false;
menuFilePrintPreview.Enabled = false;
}
CalculateLineWidths();
CalculateDocumentSize();
Text = standardTitle + " - " + FileName;
Invalidate();
}