/// <summary>
/// Event handler for buttonFind click event.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void buttonFind_Click(object sender, EventArgs e)
{
_foundBitmapLocations.Clear();
var bitmapsToFind = _fileNames.Select(fileName => new Bitmap(fileName)).ToList();
Cursor = Cursors.WaitCursor;
using (var screenBitmap = BitmapOperations.GetFullScreenBitmap())
{
foreach (var smallBitmap in bitmapsToFind)
{
if (smallBitmap.Height > screenBitmap.Height || smallBitmap.Width > screenBitmap.Width)
{
MessageBox.Show("One of the bitmaps is larger than the screen - it's not possible to find it.", "Invalid input", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
var foundLocations = BitmapOperations.SearchBitmap(smallBitmap, screenBitmap, 0).ToList();
_foundBitmapLocations.AddRange(foundLocations);
foreach (var foundLocation in foundLocations)
{
_foundTexts.Add(TextOperations.GetTextNearLocation(screenBitmap, foundLocation));
}
smallBitmap.Dispose();
}
}
Cursor = Cursors.Default;
if (_foundBitmapLocations.Count > 0)
{
var message =
new StringBuilder((bitmapsToFind.Count > 1 ? "The bitmaps were" : "The bitmap was") +
" found at the following location(s):\n");
for (var i = 0; i < _foundBitmapLocations.Count; i++)
{
message.Append(String.Format("({0},{1}): The text on the right-hand side of the bitmap was '{2}'\n", _foundBitmapLocations[i].X, _foundBitmapLocations[i].Y, _foundTexts[i].Trim()));
}
MessageBox.Show(message.ToString());
}
else
{
var message =
new StringBuilder((bitmapsToFind.Count > 1 ? "The bitmaps were" : "The bitmap was") +
" not found on the screen.");
MessageBox.Show(message.ToString());
}
}
/// <summary>
/// Parses and returns any text on the right-hand side of the location on the bitmap using Tesseract.
/// </summary>
/// <param name="bitmap"></param>
/// <param name="location"></param>
/// <returns>The text that was found.</returns>
public static string GetTextNearLocation(Bitmap bitmap, Point location)
{
//Just some sample values for debugging and testing...
var croppedArea = new Rectangle(new Point(location.X + 40, location.Y), new Size(150, 17));
using (var croppedBitmap = new Bitmap(croppedArea.Width, croppedArea.Height))
{
using (var graphics = Graphics.FromImage(croppedBitmap))
{
graphics.DrawImage(bitmap, -croppedArea.X, -croppedArea.Y);
using (var scaledBitmap = BitmapOperations.ResizeBitmap(croppedBitmap, croppedBitmap.Width * 3, croppedBitmap.Height * 3))
{
using (var engine = new TesseractEngine(@"./tessdata", "eng", EngineMode.Default))
{
using (var page = engine.Process(scaledBitmap, PageSegMode.SingleLine))
{
return(page.GetText());
}
}
}
}
}
}
