Drag Over PictureBox over other PictureBox with transparency-CodePudding

The

private void CommonPiece_Mouse_Move(object sender, MouseEventArgs e) { if (Piece_Selected) { int MousePositionX = pictureBox1.PointToClient(Cursor.Position).X; int MousePositionY = pictureBox1.PointToClient(Cursor.Position).Y; (sender as PictureBox).Left = MousePositionX - 35; (sender as PictureBox).Top = MousePositionY - 25; } }

What would be a good way to go about it?

CodePudding user response：

I did something similar, but I did not use Drag & Drop events

On MouseDown I assumed a drag operation started, I've opened a translucent unfocused window on top of the drop area, and started drawing dragged image on that form. Since the form is translucent it can show images with transparency on top of everything. I did not use images, but instead draw rectangles where users could drop. If my memory serves me correct, MouseMove events are forwarded to the dragged component, the original chess piece in your case, or the opened but unfocused form, so I can easily track the location. On MouseUp event I wrapped everything.

Since you can draw the image on the new form you can tilt image chess piece image to the left or right for a nice touch.

I developed a very strict forms designer application using this technique.

CodePudding user response：

You can use the panel instead of using the pictureBox and display the image in the background of the controls. Remember that your images must be "png" and the surrounding of the image must be completely transparent. Also, the background color of the controls of the panels Set by events so that it becomes transparent during drag and returns to the cell color after drag and drop. Good luck.