public void SetCanvas(PictureBoxObj pb)
{
lock (_canvasSync)
{
if (pb == null || pb.Image == null)
{
return;
}
Width = pb.Width;
Height = pb.Height;
_backPicture = pb;
this.Controls.Add(_backPicture);
_backPicture.SendToBack();
_backPicture.Invalidate();
_frontPicture = new PictureBoxObj(_backPicture.ClientID, _backPicture.UniqueID, PictureBoxStatus.Canvas);
this.Controls.Add(_frontPicture);
_frontPicture.Width = pb.Width;
_frontPicture.Height = pb.Width;
_frontPicture.Image = new Bitmap(Width, Height);
_frontPicture.BringToFront();
_editPBDrawObjects[0] = new DrawObjectList(0);
}
_isCleared = false;
_needUpdateFrontPicture = true;
AppLogger.Log("Picture loaded: width " + Width + ", height " + Height);
}
public void UpdateCanvas()
{
if (!_needUpdateFrontPicture || IsCleared)
{
return;
}
lock (_canvasSync)
{
using (Graphics gr = Graphics.FromImage(_frontPicture.Image))
{
gr.DrawImage(_backPicture.Image, new Rectangle(0, 0, _frontPicture.Width, _frontPicture.Height),
new Rectangle(0, 0, _backPicture.Width, _backPicture.Height), GraphicsUnit.Pixel);
PictureBoxObj[] pbs = _drawObjects.GetValues();
if (pbs != null)
{
for (int i = 0; i < pbs.Length; i++)
{
if (pbs[i] == null || pbs[i].Image == null)
{
continue;
}
Rectangle rectFrom = new Rectangle(0, 0, pbs[i].Width, pbs[i].Height);
Rectangle rectTo = new Rectangle(pbs[i].Location.X, pbs[i].Location.Y, pbs[i].Width, pbs[i].Height);
gr.DrawImage(pbs[i].Image, rectTo, rectFrom, GraphicsUnit.Pixel);
}
}
}
_frontPicture.Invalidate();
_needUpdateFrontPicture = false;
}
}
public void ApplyPictureObj(long picID)
{
lock (_canvasSync)
{
PictureBoxObj pic;
_drawObjects.TryGetValue(picID, out pic);
if (pic == null || pic.Image == null)
{
return;
}
Bitmap bm = new Bitmap(pic.Image);
using (Graphics gr = Graphics.FromImage(_backPicture.Image)){
gr.DrawImage(bm, pic.Location);
}
_drawObjects.Remove(picID);
_backPicture.Controls.Remove(pic);
pic.Dispose();
RemoveDrawObjectList(picID);
_backPicture.Invalidate();
_needUpdateFrontPicture = true;
}
}
public void AddPictureObj(PictureBoxObj pic, Point location)
{
if (IsCleared || pic == null)
{
return;
}
lock (_canvasSync)
{
if (_drawObjects.ContainsKey(pic.UniqueID))
{
return;
}
_backPicture.Controls.Add(pic);
pic.Location = location;
_drawObjects.Add(pic.UniqueID, pic);
_editPBDrawObjects.Add(pic.UniqueID, new DrawObjectList(pic.UniqueID));
pic.Invalidate();
}
AppLogger.Log("Created new pictureBox, location: " + location + " size: " + pic.Size);
}