private void OnPictureBoxPaint(object sender, PaintEventArgs e)
{
Debug.WriteLine("OnPictureBoxPaint: Image="
+ ((Image == null) ? "null" : Image.GetType().Name)
+ " LinesImage="
+ ((LinesImage == null) ? "null" : LinesImage.GetType().Name)
+ " OverlayImage="
+ ((OverlayImage == null) ? "null" : OverlayImage.GetType().Name));
if (Image == null)
{
return;
}
Graphics g = e.Graphics;
g.Clear(pictureBox.BackColor);
g.DrawImage(Image, pictureBox.ClientRectangle, ViewRectangle,
GraphicsUnit.Pixel);
if (LinesImage != null)
{
g.DrawImage(LinesImage, pictureBox.ClientRectangle, ViewRectangle,
GraphicsUnit.Pixel);
}
// Handle EDIT mode
if (ActiveMode == Mode.EDIT && OverlayImage != null)
{
g.DrawImage(OverlayImage, pictureBox.ClientRectangle, ViewRectangle,
GraphicsUnit.Pixel);
}
}
/// <summary>
/// Clears the Lines.
/// </summary>
public void clearLines()
{
endLine();
Lines.clear();
if (LinesImage != null)
{
LinesImage.Dispose();
}
LinesImage = new Bitmap(Image.Width, Image.Height);
cleanupEdit();
}
/// <summary>
/// Sets the initial, unzoomed, origin at top left ViewRectangle. Uses
/// the Current Image or loads a new one depending on replace.
/// </summary>
/// <param name="fileName">Name of an image file.</param>
/// <param name="replace">Whether to load a new Image from the fileName.</param>
private void resetImage(string fileName, bool replace)
{
if (replace)
{
if (Image != null)
{
Image.Dispose();
}
Image = new Bitmap(fileName);
if (LinesImage != null)
{
LinesImage.Dispose();
}
LinesImage = new Bitmap(Image.Width, Image.Height);
CurrentFileName = fileName;
Text = Title + ": " + CurrentFileName;
}
ZoomFactor = 1.0F;
Size clientSize = pictureBox.ClientSize;
ViewRectangle = new RectangleF(0, 0, clientSize.Width, clientSize.Height);
pictureBox.Invalidate();
}